├── .github
    ├── dependabot.yml
    └── workflows
    │   ├── release.yml
    │   └── rust.yml
├── .gitignore
├── Cargo.lock
├── Cargo.toml
├── LICENSE
├── README.md
├── flake.lock
├── flake.nix
├── src
    ├── lib.rs
    ├── main.rs
    ├── server.rs
    └── snippets
    │   ├── config.rs
    │   ├── external.rs
    │   ├── mod.rs
    │   └── vscode.rs
└── tests
    └── basic.rs


/.github/dependabot.yml:
--------------------------------------------------------------------------------
 1 | # Please see the documentation for all configuration options:
 2 | # https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
 3 | 
 4 | version: 2
 5 | updates:
 6 |   - package-ecosystem: "cargo"
 7 |     directory: "/"
 8 |     schedule:
 9 |       interval: "weekly"
10 | 


--------------------------------------------------------------------------------
/.github/workflows/release.yml:
--------------------------------------------------------------------------------
 1 | name: Release
 2 | 
 3 | permissions:
 4 |   contents: write
 5 | 
 6 | on:
 7 |   push:
 8 |     tags:
 9 |       - v[0-9]+.*
10 | 
11 | jobs:
12 |   create-release:
13 |     runs-on: ubuntu-latest
14 |     steps:
15 |       - uses: actions/checkout@v4
16 |       - uses: taiki-e/create-gh-release-action@v1
17 |         with:
18 |           # (optional) Path to changelog.
19 |           changelog: CHANGELOG.md
20 |           # (required) GitHub token for creating GitHub Releases.
21 |           token: ${{ secrets.GITHUB_TOKEN }}
22 | 
23 |   upload-assets:
24 |     needs: create-release
25 |     strategy:
26 |       matrix:
27 |         include:
28 |           - target: x86_64-unknown-linux-gnu
29 |             os: ubuntu-latest
30 |           - target: x86_64-apple-darwin
31 |             os: macos-latest
32 |           - target: aarch64-apple-darwin
33 |             os: macos-latest
34 |           - target: x86_64-pc-windows-msvc
35 |             os: windows-latest
36 |     runs-on: ${{ matrix.os }}
37 |     steps:
38 |       - uses: actions/checkout@v4
39 |       - uses: taiki-e/upload-rust-binary-action@v1
40 |         with:
41 |           # (required) Comma-separated list of binary names (non-extension portion of filename) to build and upload.
42 |           # Note that glob pattern is not supported yet.
43 |           bin: simple-completion-language-server
44 |           # (optional) Target triple, default is host triple.
45 |           # This is optional but it is recommended that this always be set to
46 |           # clarify which target you are building for if macOS is included in
47 |           # the matrix because GitHub Actions changed the default architecture
48 |           # of macos-latest since macos-14.
49 |           target: ${{ matrix.target }}
50 |           # (optional) On which platform to distribute the `.tar.gz` file.
51 |           # [default value: unix]
52 |           # [possible values: all, unix, windows, none]
53 |           tar: unix
54 |           # (optional) On which platform to distribute the `.zip` file.
55 |           # [default value: windows]
56 |           # [possible values: all, unix, windows, none]
57 |           zip: windows
58 |           # (required) GitHub token for uploading assets to GitHub Releases.
59 |           token: ${{ secrets.GITHUB_TOKEN }}
60 | 


--------------------------------------------------------------------------------
/.github/workflows/rust.yml:
--------------------------------------------------------------------------------
 1 | name: tests suite
 2 | 
 3 | on: [push, pull_request]
 4 | 
 5 | jobs:
 6 |   test:
 7 |     name: clippy&test
 8 |     runs-on: ubuntu-latest
 9 |     steps:
10 |       - uses: actions/checkout@v4
11 |       - uses: dtolnay/rust-toolchain@stable
12 |         with:
13 |           components: clippy
14 |       - run: cargo clippy --all-features
15 |       - run: cargo test --all-features
16 | 


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
1 | /target
2 | 


--------------------------------------------------------------------------------
/Cargo.lock:
--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
/Cargo.toml:
--------------------------------------------------------------------------------
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 4 | edition = "2021"
 5 | 
 6 | [[bin]]
 7 | name = "simple-completion-language-server"
 8 | path = "src/main.rs"
 9 | 
10 | [features]
11 | default = []
12 | citation = ["regex-cursor", "biblatex"]
13 | 
14 | [dependencies]
15 | anyhow = "1.0"
16 | ropey = "1.6"
17 | aho-corasick = "1.1"
18 | tokio = { version = "1", features = ["rt", "rt-multi-thread", "io-std", "macros"] }
19 | tower-lsp = { version = "0.20", features = ["runtime-tokio"] }
20 | serde = { version = "1", features = ["serde_derive"] }
21 | serde_json = { version = "1" }
22 | caseless = "0.2"
23 | toml = "0.8"
24 | etcetera = "0.10"
25 | xshell = "0.2"
26 | 
27 | # citation completion
28 | regex-cursor = { version = "0.1", optional = true }
29 | biblatex = { version = "0.10", optional = true }
30 | 
31 | tracing = "0.1"
32 | tracing-subscriber = { version =  "0.3", features = ["env-filter", "fmt"] }
33 | tracing-appender = "0.2" 
34 | 
35 | [dev-dependencies]
36 | test-log = { version = "0.2", default-features = false, features = ["trace"] }
37 | 


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
 1 | MIT License
 2 | 
 3 | Copyright (c) 2023 Evgeniy Tatarkin
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
  1 | <div align="center">
  2 |   <p><h1>simple-completion-language-server</h1> </p>
  3 |   <p><strong>Allow to use common word completion and snippets for <a href="https://helix-editor.com/">Helix editor</a></strong></p>
  4 |   <p></p>
  5 | </div>
  6 | 
  7 | 
  8 | https://github.com/estin/simple-completion-language-server/assets/520814/10566ad4-d6d1-475b-8561-2e909be0f875
  9 | 
 10 | Based on [comment](https://github.com/helix-editor/helix/pull/3328#issuecomment-1559031060)
 11 | 
 12 | ### Install
 13 | 
 14 | #### From source
 15 | 
 16 | From GitHub:
 17 | 
 18 | ```console
 19 | $ cargo install --git https://github.com/estin/simple-completion-language-server.git
 20 | ```
 21 | 
 22 | From local repository:
 23 | 
 24 | ```console
 25 | $ git clone https://github.com/estin/simple-completion-language-server.git
 26 | $ cd simple-completion-language-server
 27 | $ cargo install --path .
 28 | ```
 29 | 
 30 | #### Nix
 31 | 
 32 | You can install `simple-completion-language-server` using the [nix package manager](https://nixos.org/) from [nixpkgs](https://search.nixos.org/packages?channel=unstable&show=simple-completion-language-server&from=0&size=50&sort=relevance&type=packages&query=simple-comple).
 33 | 
 34 | > [!NOTE]  
 35 | > At the moment the package is only available on the [unstable](https://nixos.org/manual/nixpkgs/unstable/#overview-of-nixpkgs) channel of nixpkgs.
 36 | 
 37 | ```console
 38 | # Add it to a temporary shell environment
 39 | nix shell nixpkgs#simple-completion-language-server
 40 | # Add it to your current profile
 41 | nix profile install nixpkgs#simple-completion-language-server
 42 | ```
 43 | 
 44 | > [!NOTE]
 45 | > The above instructions assume you have enabled the *experimental features* `nix-command` `flakes`. If you are unsure about what this means or how to check read [here](https://nixos.wiki/wiki/Flakes).
 46 | 
 47 | If you are on [NixOS](https://nixos.org/) or are using [home-manager](https://nix-community.github.io/home-manager/) you can do one of the following:
 48 | 
 49 | ```nix
 50 | # NixOS configuration.nix
 51 | environment.systemPackages = [pkgs.simple-completion-language-server];
 52 | 
 53 | # or home-manager config
 54 | home.packages = [pkgs.simple-completion-language-server];
 55 | # This will let `hx` know about the location of the binary without putting it in your $PATH
 56 | programs.helix.extraPackages = [pkgs.simple-completion-language-server];
 57 | ```
 58 | 
 59 | ### Configure
 60 | 
 61 | For Helix on `~/.config/helix/languages.toml`
 62 | 
 63 | ```toml
 64 | # introduce new language server
 65 | [language-server.scls]
 66 | command = "simple-completion-language-server"
 67 | 
 68 | [language-server.scls.config]
 69 | max_completion_items = 100           # set max completion results len for each group: words, snippets, unicode-input
 70 | feature_words = true                 # enable completion by word
 71 | feature_snippets = true              # enable snippets
 72 | snippets_first = true                # completions will return before snippets by default
 73 | snippets_inline_by_word_tail = false # suggest snippets by WORD tail, for example text `xsq|` become `x^2|` when snippet `sq` has body `^2`
 74 | feature_unicode_input = false        # enable "unicode input"
 75 | feature_paths = false                # enable path completion
 76 | feature_citations = false            # enable citation completion (only on `citation` feature enabled)
 77 | 
 78 | 
 79 | # write logs to /tmp/completion.log
 80 | [language-server.scls.environment]
 81 | RUST_LOG = "info,simple-completion-language-server=info"
 82 | LOG_FILE = "/tmp/completion.log"
 83 | 
 84 | # append language server to existed languages
 85 | [[language]]
 86 | name = "rust"
 87 | language-servers = [ "scls", "rust-analyzer" ]
 88 | 
 89 | [[language]]
 90 | name = "git-commit"
 91 | language-servers = [ "scls" ]
 92 | 
 93 | # etc..
 94 | 
 95 | # introduce a new language to enable completion on any doc by forcing set language with :set-language stub
 96 | [[language]]
 97 | name = "stub"
 98 | scope = "text.stub"
 99 | file-types = []
100 | shebangs = []
101 | roots = []
102 | auto-format = false
103 | language-servers = [ "scls" ]
104 | ```
105 | 
106 | ### Snippets
107 | 
108 | Read snippets from dir `~/.config/helix/snippets` or specify snippets path via `SNIPPETS_PATH` env.
109 | 
110 | Default lookup directory can be overriden via `SCLS_CONFIG_SUBDIRECTORY` as well (e.g. when SCLS_CONFIG_SUBDIRECTORY = `vim`, SCLS will perform it's lookups in `~/.config/vim` instead)
111 | 
112 | Currently, it supports our own `toml` format and vscode `json` (a basic effort).
113 | 
114 | Filename used as snippet scope ([language id][1]), filename `snippets.(toml|json)` will not attach scope to snippets.
115 | 
116 | For example, snippets with the filename `python.toml` or `python.json` would have a `python` scope.
117 | 
118 | Snippets format
119 | 
120 | ```toml
121 | [[snippets]]
122 | prefix = "ld"
123 | scope = [ "python" ]  # language id https://code.visualstudio.com/docs/languages/identifiers#_known-language-identifiers
124 | body = 'log.debug("$1")'
125 | description = "log at debug level"
126 | ```
127 | 
128 | ### Use external snippets collections from git repos
129 | 
130 | Configure sources in `~/.config/helix/external-snippets.toml` (or via env `EXTERNAL_SNIPPETS_CONFIG`)
131 | 
132 | 1. Declare list of sources by key `[[sources]]`
133 | 
134 | 2. Optionally, declare paths to load snippets on current source by `[[source.paths]]`.
135 | 
136 | Highly recommended to declare concrete paths with scopes. To explicit configure required snippets and its scopes.
137 | 
138 | Snippets suggestion filtered out by document scope.
139 | 
140 | Scope it's [language id](https://code.visualstudio.com/docs/languages/identifiers#_known-language-identifiers) and **not file extension** by language server protocol.
141 | 
142 | If `[[source.paths]]` isn't specified for source then all files with extensions `.json` and `.toml` would be tried to load. Scope at that case would be equal filename.
143 | To apply snippets the filename must be one of known language id.
144 | 
145 | 3. Run commands to fetch and validate snippets
146 | 
147 | ```console
148 | 
149 | # Clone or update snippets source repos to `~/.config/helix/external-snippets/<repo path>`
150 | simple-completion-language-server fetch-external-snippets
151 | 
152 | # Try to find and parse snippets
153 | simple-completion-language-server validate-snippets
154 | 
155 | ```
156 | 
157 | #### Config format for external snippets
158 | 
159 | ```toml
160 | # first external source to load snippets
161 | [[sources]] # list of sources to load
162 | name = "source1" # optional name shown on snippet description 
163 | git = "https://example.com/source1.git" # git repo with snippets collections
164 | 
165 | [[sources.paths]] # explicit list of paths to load on current source
166 | scope = ["scope1", "scope2"] # optional scopes (language id) for current snippets
167 | path = "path-in-repo/snippets1.json" # where snippet file or dir located in repo
168 | 
169 | [[sources.paths]]
170 | scope = ["scope3"]
171 | path = "path-in-repo/snippets2.json"
172 | 
173 | # next external source to load snippets
174 | [[sources]]
175 | name = "source2"  
176 | git = "https://example.com/source2.git"
177 | 
178 | [[sources.paths]]
179 | scope = ["scope1"]
180 | path = "path-in-repo-of-source2/snippets1.json"
181 | ```
182 | 
183 | #### Example
184 | 
185 | Load python snippets from file https://github.com/rafamadriz/friendly-snippets/blob/main/snippets/python/python.json
186 | 
187 | File `~/.config/helix/external-snippets.toml`
188 | 
189 | ```toml
190 | [[sources]] 
191 | name = "friendly-snippets"  
192 | git = "https://github.com/rafamadriz/friendly-snippets.git" 
193 | 
194 | [[sources.paths]] 
195 | scope = ["python"]  
196 | path = "snippets/python/python.json"  
197 | ```
198 | 
199 | Clone or update snippets source repos to `~/.config/helix/external-snippets/<repo path>`
200 | 
201 | ```console
202 | $ simple-completion-language-server fetch-external-snippets
203 | ```
204 | 
205 | Validate snippets
206 | 
207 | ```console
208 | $ simple-completion-language-server validate-snippets
209 | ```
210 | 
211 | ### Unicode input
212 | 
213 | Read unicode input config as each file from dir `~/.config/helix/unicode-input` (or specify path via `UNICODE_INPUT_PATH` env).
214 | 
215 | Unicode input format (toml key-value), for example `~/.config/helix/unicode-input/base.toml`
216 | 
217 | ```toml
218 | alpha = "α"
219 | betta = "β"
220 | gamma = "γ"
221 | fire = "🔥"
222 | ```
223 | 
224 | 
225 | Validate unicode input config
226 | 
227 | ```console
228 | $ simple-completion-language-server validate-unicode-input
229 | ```
230 | 
231 | ### Citation completion
232 | 
233 | Citation keys completion from bibliography file declared in current document.
234 | When completion is triggered with a prefixed `@` (which can be configured via `citation_prefix_trigger` settings), scls will try to extract the bibliography file path from the current document (regex can be configured via the `citation_bibfile_extract_regexp` setting) to parse and use it as a completion source.
235 | 
236 | To enable this feature, scls must be compiled with the `--features citation` flag. 
237 | 
238 | ```console
239 | $ cargo install --features citation --git https://github.com/estin/simple-completion-language-server.git
240 | ```
241 | 
242 | And initialize scls with `feature_citations = true`.
243 | 
244 | ```toml
245 | [language-server.scls.config]
246 | max_completion_items = 20
247 | feature_citations = true
248 | ```
249 | 
250 | For more info, please check https://github.com/estin/simple-completion-language-server/issues/78
251 | 
252 | ### Similar projects
253 | 
254 | - [erasin/hx-lsp](https://github.com/erasin/hx-lsp)
255 | - [metafates/buffer-language-server](https://github.com/metafates/buffer-language-server)
256 | - [rajasegar/helix-snippets-ls](https://github.com/rajasegar/helix-snippets-ls)
257 | - [quantonganh/snippets-ls](https://github.com/quantonganh/snippets-ls)
258 | - [Stanislav-Lapata/snippets-ls](https://github.com/Stanislav-Lapata/snippets-ls)
259 | - ...(please add another useful links here)
260 | 
261 | ### Useful snippets collections
262 | 
263 | - [rafamadriz/friendly-snippets](https://github.com/rafamadriz/friendly-snippets)
264 | - ...(please add another useful links here)
265 | 
266 | [1]: <https://code.visualstudio.com/docs/languages/identifiers#_known-language-identifiers> "Known language identifiers"
267 | 


--------------------------------------------------------------------------------
/flake.lock:
--------------------------------------------------------------------------------
 1 | {
 2 |   "nodes": {
 3 |     "flake-utils": {
 4 |       "inputs": {
 5 |         "systems": "systems"
 6 |       },
 7 |       "locked": {
 8 |         "lastModified": 1731533236,
 9 |         "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
10 |         "owner": "numtide",
11 |         "repo": "flake-utils",
12 |         "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
13 |         "type": "github"
14 |       },
15 |       "original": {
16 |         "owner": "numtide",
17 |         "repo": "flake-utils",
18 |         "type": "github"
19 |       }
20 |     },
21 |     "naersk": {
22 |       "inputs": {
23 |         "nixpkgs": [
24 |           "nixpkgs"
25 |         ]
26 |       },
27 |       "locked": {
28 |         "lastModified": 1736429655,
29 |         "narHash": "sha256-BwMekRuVlSB9C0QgwKMICiJ5EVbLGjfe4qyueyNQyGI=",
30 |         "owner": "nix-community",
31 |         "repo": "naersk",
32 |         "rev": "0621e47bd95542b8e1ce2ee2d65d6a1f887a13ce",
33 |         "type": "github"
34 |       },
35 |       "original": {
36 |         "owner": "nix-community",
37 |         "ref": "master",
38 |         "repo": "naersk",
39 |         "type": "github"
40 |       }
41 |     },
42 |     "nixpkgs": {
43 |       "locked": {
44 |         "lastModified": 1738136902,
45 |         "narHash": "sha256-pUvLijVGARw4u793APze3j6mU1Zwdtz7hGkGGkD87qw=",
46 |         "owner": "NixOS",
47 |         "repo": "nixpkgs",
48 |         "rev": "9a5db3142ce450045840cc8d832b13b8a2018e0c",
49 |         "type": "github"
50 |       },
51 |       "original": {
52 |         "owner": "NixOS",
53 |         "ref": "nixpkgs-unstable",
54 |         "repo": "nixpkgs",
55 |         "type": "github"
56 |       }
57 |     },
58 |     "root": {
59 |       "inputs": {
60 |         "flake-utils": "flake-utils",
61 |         "naersk": "naersk",
62 |         "nixpkgs": "nixpkgs"
63 |       }
64 |     },
65 |     "systems": {
66 |       "locked": {
67 |         "lastModified": 1681028828,
68 |         "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
69 |         "owner": "nix-systems",
70 |         "repo": "default",
71 |         "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
72 |         "type": "github"
73 |       },
74 |       "original": {
75 |         "owner": "nix-systems",
76 |         "repo": "default",
77 |         "type": "github"
78 |       }
79 |     }
80 |   },
81 |   "root": "root",
82 |   "version": 7
83 | }
84 | 


--------------------------------------------------------------------------------
/flake.nix:
--------------------------------------------------------------------------------
 1 | {
 2 |   description = "A simple language server protocol for snippets.";
 3 | 
 4 |   inputs = {
 5 |     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
 6 |     naersk = {
 7 |       url = "github:nix-community/naersk/master";
 8 |       inputs.nixpkgs.follows = "nixpkgs";
 9 |     };
10 |     flake-utils.url = "github:numtide/flake-utils";
11 |   };
12 | 
13 |   outputs = { self, nixpkgs, flake-utils, naersk }:
14 |     flake-utils.lib.eachDefaultSystem (system:
15 |       let
16 |         pkgs = import nixpkgs { inherit system; };
17 |         naersk-lib = pkgs.callPackage naersk { };
18 |       in {
19 |         defaultPackage = naersk-lib.buildPackage ./.;
20 |         devShell = with pkgs;
21 |           mkShell {
22 |             buildInputs =
23 |               [ cargo rustc rustfmt pre-commit rustPackages.clippy ];
24 |             RUST_SRC_PATH = rustPlatform.rustLibSrc;
25 |           };
26 |       });
27 | }
28 | 


--------------------------------------------------------------------------------
/src/lib.rs:
--------------------------------------------------------------------------------
   1 | use aho_corasick::AhoCorasick;
   2 | use anyhow::Result;
   3 | use ropey::Rope;
   4 | use serde::Deserialize;
   5 | use std::borrow::Cow;
   6 | use std::collections::{HashMap, HashSet};
   7 | use std::io::prelude::*;
   8 | use std::path::PathBuf;
   9 | use tokio::sync::{mpsc, oneshot};
  10 | use tower_lsp::lsp_types::*;
  11 | 
  12 | #[cfg(feature = "citation")]
  13 | use biblatex::Type;
  14 | #[cfg(feature = "citation")]
  15 | use regex_cursor::{engines::meta::Regex, Input, RopeyCursor};
  16 | 
  17 | pub mod server;
  18 | pub mod snippets;
  19 | 
  20 | use snippets::{Snippet, UnicodeInputItem};
  21 | 
  22 | pub struct StartOptions {
  23 |     pub home_dir: String,
  24 |     pub external_snippets_config_path: std::path::PathBuf,
  25 |     pub snippets_path: std::path::PathBuf,
  26 |     pub unicode_input_path: std::path::PathBuf,
  27 | }
  28 | 
  29 | #[derive(Deserialize)]
  30 | pub struct BackendSettings {
  31 |     pub max_completion_items: usize,
  32 |     pub max_chars_prefix_len: usize,
  33 |     pub min_chars_prefix_len: usize,
  34 |     pub snippets_first: bool,
  35 |     pub snippets_inline_by_word_tail: bool,
  36 |     // citation
  37 |     pub citation_prefix_trigger: String,
  38 |     pub citation_bibfile_extract_regexp: String,
  39 |     // feature flags
  40 |     pub feature_words: bool,
  41 |     pub feature_snippets: bool,
  42 |     pub feature_unicode_input: bool,
  43 |     pub feature_paths: bool,
  44 |     pub feature_citations: bool,
  45 | }
  46 | 
  47 | #[derive(Deserialize)]
  48 | pub struct PartialBackendSettings {
  49 |     pub max_completion_items: Option<usize>,
  50 |     pub max_chars_prefix_len: Option<usize>,
  51 |     pub min_chars_prefix_len: Option<usize>,
  52 |     pub max_path_chars: Option<usize>,
  53 |     pub snippets_first: Option<bool>,
  54 |     pub snippets_inline_by_word_tail: Option<bool>,
  55 |     // citation
  56 |     pub citation_prefix_trigger: Option<String>,
  57 |     pub citation_bibfile_extract_regexp: Option<String>,
  58 |     // feature flags
  59 |     pub feature_words: Option<bool>,
  60 |     pub feature_snippets: Option<bool>,
  61 |     pub feature_unicode_input: Option<bool>,
  62 |     pub feature_paths: Option<bool>,
  63 |     pub feature_citations: Option<bool>,
  64 | 
  65 |     #[serde(flatten)]
  66 |     pub extra: Option<serde_json::Value>,
  67 | }
  68 | 
  69 | impl Default for BackendSettings {
  70 |     fn default() -> Self {
  71 |         BackendSettings {
  72 |             min_chars_prefix_len: 2,
  73 |             max_completion_items: 100,
  74 |             max_chars_prefix_len: 64,
  75 |             snippets_first: false,
  76 |             snippets_inline_by_word_tail: false,
  77 |             citation_prefix_trigger: "@".to_string(),
  78 |             citation_bibfile_extract_regexp: r#"bibliography:\s*['"\[]*([~\w\./\\-]*)['"\]]*"#
  79 |                 .to_string(),
  80 |             feature_words: true,
  81 |             feature_snippets: true,
  82 |             feature_unicode_input: false,
  83 |             feature_paths: false,
  84 |             feature_citations: false,
  85 |         }
  86 |     }
  87 | }
  88 | 
  89 | impl BackendSettings {
  90 |     pub fn apply_partial_settings(&self, settings: PartialBackendSettings) -> Self {
  91 |         Self {
  92 |             max_completion_items: settings
  93 |                 .max_completion_items
  94 |                 .unwrap_or(self.max_completion_items),
  95 |             max_chars_prefix_len: settings.max_path_chars.unwrap_or(self.max_chars_prefix_len),
  96 |             min_chars_prefix_len: settings
  97 |                 .min_chars_prefix_len
  98 |                 .unwrap_or(self.min_chars_prefix_len),
  99 |             snippets_first: settings.snippets_first.unwrap_or(self.snippets_first),
 100 |             snippets_inline_by_word_tail: settings
 101 |                 .snippets_inline_by_word_tail
 102 |                 .unwrap_or(self.snippets_inline_by_word_tail),
 103 |             citation_prefix_trigger: settings
 104 |                 .citation_prefix_trigger
 105 |                 .clone()
 106 |                 .unwrap_or_else(|| self.citation_prefix_trigger.to_owned()),
 107 |             citation_bibfile_extract_regexp: settings
 108 |                 .citation_prefix_trigger
 109 |                 .clone()
 110 |                 .unwrap_or_else(|| self.citation_bibfile_extract_regexp.to_owned()),
 111 |             feature_words: settings.feature_words.unwrap_or(self.feature_words),
 112 |             feature_snippets: settings.feature_snippets.unwrap_or(self.feature_snippets),
 113 |             feature_unicode_input: settings
 114 |                 .feature_unicode_input
 115 |                 .unwrap_or(self.feature_unicode_input),
 116 |             feature_paths: settings.feature_paths.unwrap_or(self.feature_paths),
 117 |             feature_citations: settings.feature_citations.unwrap_or(self.feature_citations),
 118 |         }
 119 |     }
 120 | }
 121 | 
 122 | #[inline]
 123 | pub fn char_is_word(ch: char) -> bool {
 124 |     ch.is_alphanumeric() || ch == '_' || ch == '-'
 125 | }
 126 | 
 127 | #[inline]
 128 | pub fn char_is_char_prefix(ch: char) -> bool {
 129 |     ch != ' ' && ch != '\n' && ch != '\t'
 130 | }
 131 | 
 132 | #[inline]
 133 | pub fn starts_with(source: &str, s: &str) -> bool {
 134 |     if s.len() > source.len() {
 135 |         return false;
 136 |     }
 137 |     let Some(part) = source.get(..s.len()) else {
 138 |         return false;
 139 |     };
 140 |     caseless::default_caseless_match_str(part, s)
 141 | }
 142 | 
 143 | enum PathLogic {
 144 |     Full,
 145 |     Tilde,
 146 |     RelativeCurrent,
 147 |     RelativeParent,
 148 | }
 149 | 
 150 | struct PathState<'a> {
 151 |     logic: PathLogic,
 152 |     home_dir: &'a str,
 153 |     current_dir: PathBuf,
 154 |     parent_dir: Option<PathBuf>,
 155 | }
 156 | 
 157 | impl From<&str> for PathLogic {
 158 |     fn from(s: &str) -> Self {
 159 |         if s.starts_with("~/") {
 160 |             PathLogic::Tilde
 161 |         } else if s.starts_with("./") {
 162 |             PathLogic::RelativeCurrent
 163 |         } else if s.starts_with("../") {
 164 |             PathLogic::RelativeParent
 165 |         } else {
 166 |             PathLogic::Full
 167 |         }
 168 |     }
 169 | }
 170 | 
 171 | impl<'a> PathState<'a> {
 172 |     fn new(s: &'a str, home_dir: &'a str, document_path: &'a str) -> Self {
 173 |         let logic = PathLogic::from(s);
 174 |         let current_dir = PathBuf::from(document_path);
 175 |         let current_dir = current_dir
 176 |             .parent()
 177 |             .map(PathBuf::from)
 178 |             .unwrap_or(current_dir);
 179 |         Self {
 180 |             home_dir,
 181 |             parent_dir: if matches!(logic, PathLogic::RelativeParent) {
 182 |                 current_dir.parent().map(PathBuf::from)
 183 |             } else {
 184 |                 None
 185 |             },
 186 |             logic,
 187 |             current_dir,
 188 |         }
 189 |     }
 190 | 
 191 |     fn expand(&'a self, s: &'a str) -> Cow<'a, str> {
 192 |         match self.logic {
 193 |             PathLogic::Full => Cow::Borrowed(s),
 194 |             PathLogic::Tilde => Cow::Owned(s.replacen('~', self.home_dir, 1)),
 195 |             PathLogic::RelativeCurrent => {
 196 |                 if let Some(dir) = self.current_dir.to_str() {
 197 |                     tracing::warn!("Can't represent current_dir {:?} as str", self.current_dir);
 198 |                     Cow::Owned(s.replacen(".", dir, 1))
 199 |                 } else {
 200 |                     Cow::Borrowed(s)
 201 |                 }
 202 |             }
 203 |             PathLogic::RelativeParent => {
 204 |                 if let Some(dir) = self.parent_dir.as_ref().and_then(|p| p.to_str()) {
 205 |                     tracing::warn!("Can't represent current_dir {:?} as str", self.current_dir);
 206 |                     Cow::Owned(s.replacen("..", dir, 1))
 207 |                 } else {
 208 |                     Cow::Borrowed(s)
 209 |                 }
 210 |             }
 211 |         }
 212 |     }
 213 |     fn fold(&'a self, s: &'a str) -> Cow<'a, str> {
 214 |         match self.logic {
 215 |             PathLogic::Full => Cow::Borrowed(s),
 216 |             PathLogic::Tilde => Cow::Owned(s.replacen(self.home_dir, "~", 1)),
 217 |             PathLogic::RelativeCurrent => {
 218 |                 if let Some(dir) = self.current_dir.to_str() {
 219 |                     tracing::warn!("Can't represent current_dir {:?} as str", self.current_dir);
 220 |                     Cow::Owned(s.replacen(dir, ".", 1))
 221 |                 } else {
 222 |                     Cow::Borrowed(s)
 223 |                 }
 224 |             }
 225 | 
 226 |             PathLogic::RelativeParent => {
 227 |                 if let Some(dir) = self.parent_dir.as_ref().and_then(|p| p.to_str()) {
 228 |                     tracing::warn!("Can't represent current_dir {:?} as str", self.current_dir);
 229 |                     Cow::Owned(s.replacen(dir, "..", 1))
 230 |                 } else {
 231 |                     Cow::Borrowed(s)
 232 |                 }
 233 |             }
 234 |         }
 235 |     }
 236 | }
 237 | 
 238 | impl PathLogic {}
 239 | 
 240 | pub struct RopeReader<'a> {
 241 |     tail: Vec<u8>,
 242 |     chunks: ropey::iter::Chunks<'a>,
 243 | }
 244 | 
 245 | impl<'a> RopeReader<'a> {
 246 |     pub fn new(rope: &'a ropey::Rope) -> Self {
 247 |         RopeReader {
 248 |             tail: Vec::new(),
 249 |             chunks: rope.chunks(),
 250 |         }
 251 |     }
 252 | }
 253 | 
 254 | impl std::io::Read for RopeReader<'_> {
 255 |     fn read(&mut self, mut buf: &mut [u8]) -> std::io::Result<usize> {
 256 |         match self.chunks.next() {
 257 |             Some(chunk) => {
 258 |                 let tail_len = self.tail.len();
 259 | 
 260 |                 // write previous tail
 261 |                 if tail_len > 0 {
 262 |                     let tail = self.tail.drain(..);
 263 |                     Write::write_all(&mut buf, tail.as_slice())?;
 264 |                 }
 265 | 
 266 |                 // find last ending word
 267 |                 let data = if let Some((byte_pos, _)) = chunk
 268 |                     .char_indices()
 269 |                     .rev()
 270 |                     .find(|(_, ch)| !char_is_word(*ch))
 271 |                 {
 272 |                     if byte_pos != 0 {
 273 |                         Write::write_all(&mut self.tail, &chunk.as_bytes()[byte_pos..])?;
 274 |                         &chunk[0..byte_pos]
 275 |                     } else {
 276 |                         chunk
 277 |                     }
 278 |                 } else {
 279 |                     chunk
 280 |                 };
 281 |                 Write::write_all(&mut buf, data.as_bytes())?;
 282 |                 Ok(tail_len + data.len())
 283 |             }
 284 |             _ => {
 285 |                 let tail_len = self.tail.len();
 286 | 
 287 |                 if tail_len == 0 {
 288 |                     return Ok(0);
 289 |                 }
 290 | 
 291 |                 // write previous tail
 292 |                 let tail = self.tail.drain(..);
 293 |                 Write::write_all(&mut buf, tail.as_slice())?;
 294 |                 Ok(tail_len)
 295 |             }
 296 |         }
 297 |     }
 298 | }
 299 | 
 300 | pub fn ac_searcher(prefix: &str) -> Result<AhoCorasick> {
 301 |     AhoCorasick::builder()
 302 |         .ascii_case_insensitive(true)
 303 |         .build([&prefix])
 304 |         .map_err(|e| anyhow::anyhow!("error {e}"))
 305 | }
 306 | 
 307 | pub fn search(
 308 |     prefix: &str,
 309 |     text: &Rope,
 310 |     ac: &AhoCorasick,
 311 |     max_completion_items: usize,
 312 |     result: &mut HashSet<String>,
 313 | ) -> Result<()> {
 314 |     let searcher = ac.try_stream_find_iter(RopeReader::new(text))?;
 315 | 
 316 |     for mat in searcher {
 317 |         let mat = mat?;
 318 | 
 319 |         let Ok(start_char_idx) = text.try_byte_to_char(mat.start()) else {
 320 |             continue;
 321 |         };
 322 |         let Ok(mat_end) = text.try_byte_to_char(mat.end()) else {
 323 |             continue;
 324 |         };
 325 | 
 326 |         // check is word start
 327 |         if mat.start() > 0 {
 328 |             let Ok(s) = text.try_byte_to_char(mat.start() - 1) else {
 329 |                 continue;
 330 |             };
 331 |             let Some(ch) = text.get_char(s) else {
 332 |                 continue;
 333 |             };
 334 |             if char_is_word(ch) {
 335 |                 continue;
 336 |             }
 337 |         }
 338 | 
 339 |         // search word end
 340 |         let word_end = text
 341 |             .chars()
 342 |             .skip(mat_end)
 343 |             .take_while(|ch| char_is_word(*ch))
 344 |             .count();
 345 | 
 346 |         let Ok(word_end) = text.try_char_to_byte(mat_end + word_end) else {
 347 |             continue;
 348 |         };
 349 |         let Ok(end_char_idx) = text.try_byte_to_char(word_end) else {
 350 |             continue;
 351 |         };
 352 | 
 353 |         let item = text.slice(start_char_idx..end_char_idx);
 354 |         if let Some(item) = item.as_str() {
 355 |             if item != prefix && starts_with(item, prefix) {
 356 |                 result.insert(item.to_string());
 357 |                 if result.len() >= max_completion_items {
 358 |                     return Ok(());
 359 |                 }
 360 |             }
 361 |         }
 362 |     }
 363 | 
 364 |     Ok(())
 365 | }
 366 | 
 367 | #[derive(Debug)]
 368 | pub enum BackendRequest {
 369 |     NewDoc(DidOpenTextDocumentParams),
 370 |     ChangeDoc(DidChangeTextDocumentParams),
 371 |     ChangeConfiguration(DidChangeConfigurationParams),
 372 |     SaveDoc(DidSaveTextDocumentParams),
 373 |     CompletionRequest(
 374 |         (
 375 |             oneshot::Sender<anyhow::Result<BackendResponse>>,
 376 |             CompletionParams,
 377 |         ),
 378 |     ),
 379 | }
 380 | 
 381 | #[derive(Debug)]
 382 | pub enum BackendResponse {
 383 |     CompletionResponse(CompletionResponse),
 384 | }
 385 | 
 386 | pub struct Document {
 387 |     uri: Url,
 388 |     text: Rope,
 389 |     language_id: String,
 390 | }
 391 | 
 392 | pub struct BackendState {
 393 |     home_dir: String,
 394 |     settings: BackendSettings,
 395 |     docs: HashMap<Url, Document>,
 396 |     snippets: Vec<Snippet>,
 397 |     unicode_input: Vec<UnicodeInputItem>,
 398 |     max_unicode_input_prefix_len: usize,
 399 |     max_snippet_input_prefix_len: usize,
 400 |     rx: mpsc::UnboundedReceiver<BackendRequest>,
 401 | 
 402 |     #[cfg(feature = "citation")]
 403 |     citation_bibliography_re: Option<Regex>,
 404 | }
 405 | 
 406 | impl BackendState {
 407 |     pub async fn new(
 408 |         home_dir: String,
 409 |         snippets: Vec<Snippet>,
 410 |         unicode_input: Vec<UnicodeInputItem>,
 411 |     ) -> (mpsc::UnboundedSender<BackendRequest>, Self) {
 412 |         let (request_tx, request_rx) = mpsc::unbounded_channel::<BackendRequest>();
 413 | 
 414 |         let settings = BackendSettings::default();
 415 |         (
 416 |             request_tx,
 417 |             BackendState {
 418 |                 home_dir,
 419 |                 #[cfg(feature = "citation")]
 420 |                 citation_bibliography_re: Regex::new(&settings.citation_bibfile_extract_regexp)
 421 |                     .map_err(|e| {
 422 |                         tracing::error!("Invalid citation bibliography regex: {e}");
 423 |                         e
 424 |                     })
 425 |                     .ok(),
 426 | 
 427 |                 settings,
 428 |                 docs: HashMap::new(),
 429 |                 max_unicode_input_prefix_len: unicode_input
 430 |                     .iter()
 431 |                     .map(|s| s.prefix.len())
 432 |                     .max()
 433 |                     .unwrap_or_default(),
 434 |                 max_snippet_input_prefix_len: snippets
 435 |                     .iter()
 436 |                     .map(|s| s.prefix.len())
 437 |                     .max()
 438 |                     .unwrap_or_default(),
 439 |                 snippets,
 440 |                 unicode_input,
 441 |                 rx: request_rx,
 442 |             },
 443 |         )
 444 |     }
 445 | 
 446 |     fn save_doc(&mut self, params: DidSaveTextDocumentParams) -> Result<()> {
 447 |         let Some(doc) = self.docs.get_mut(&params.text_document.uri) else {
 448 |             anyhow::bail!("Document {} not found", params.text_document.uri)
 449 |         };
 450 |         doc.text = if let Some(text) = &params.text {
 451 |             Rope::from_str(text)
 452 |         } else {
 453 |             // Sync read content from file
 454 |             let file = std::fs::File::open(params.text_document.uri.path())?;
 455 |             Rope::from_reader(file)?
 456 |         };
 457 |         Ok(())
 458 |     }
 459 | 
 460 |     fn change_doc(&mut self, params: DidChangeTextDocumentParams) -> Result<()> {
 461 |         let Some(doc) = self.docs.get_mut(&params.text_document.uri) else {
 462 |             tracing::error!("Doc {} not found", params.text_document.uri);
 463 |             return Ok(());
 464 |         };
 465 |         for change in params.clone().content_changes {
 466 |             let Some(range) = change.range else { continue };
 467 |             let start_idx = doc
 468 |                 .text
 469 |                 .try_line_to_char(range.start.line as usize)
 470 |                 .map(|idx| idx + range.start.character as usize);
 471 |             let end_idx = doc
 472 |                 .text
 473 |                 .try_line_to_char(range.end.line as usize)
 474 |                 .map(|idx| idx + range.end.character as usize)
 475 |                 .and_then(|c| {
 476 |                     if c > doc.text.len_chars() {
 477 |                         Err(ropey::Error::CharIndexOutOfBounds(c, doc.text.len_chars()))
 478 |                     } else {
 479 |                         Ok(c)
 480 |                     }
 481 |                 });
 482 | 
 483 |             match (start_idx, end_idx) {
 484 |                 (Ok(start_idx), Err(_)) => {
 485 |                     doc.text.try_remove(start_idx..)?;
 486 |                     doc.text.try_insert(start_idx, &change.text)?;
 487 |                 }
 488 |                 (Ok(start_idx), Ok(end_idx)) => {
 489 |                     doc.text.try_remove(start_idx..end_idx)?;
 490 |                     doc.text.try_insert(start_idx, &change.text)?;
 491 |                 }
 492 |                 (Err(_), _) => {
 493 |                     *doc = Document {
 494 |                         uri: doc.uri.clone(),
 495 |                         text: Rope::from(change.text),
 496 |                         language_id: doc.language_id.clone(),
 497 |                     }
 498 |                 }
 499 |             }
 500 |         }
 501 |         Ok(())
 502 |     }
 503 | 
 504 |     fn change_configuration(&mut self, params: DidChangeConfigurationParams) -> Result<()> {
 505 |         self.settings = self
 506 |             .settings
 507 |             .apply_partial_settings(serde_json::from_value(params.settings)?);
 508 | 
 509 |         #[cfg(feature = "citation")]
 510 |         {
 511 |             self.citation_bibliography_re =
 512 |                 Some(Regex::new(&self.settings.citation_bibfile_extract_regexp)?);
 513 |         };
 514 | 
 515 |         Ok(())
 516 |     }
 517 | 
 518 |     fn get_prefix(
 519 |         &self,
 520 |         max_chars: usize,
 521 |         params: &CompletionParams,
 522 |     ) -> Result<(Option<&str>, Option<&str>, &Document)> {
 523 |         let Some(doc) = self
 524 |             .docs
 525 |             .get(&params.text_document_position.text_document.uri)
 526 |         else {
 527 |             anyhow::bail!(
 528 |                 "Document {} not found",
 529 |                 params.text_document_position.text_document.uri
 530 |             )
 531 |         };
 532 | 
 533 |         // word prefix
 534 |         let cursor = doc
 535 |             .text
 536 |             .try_line_to_char(params.text_document_position.position.line as usize)?
 537 |             + params.text_document_position.position.character as usize;
 538 |         let mut iter = doc
 539 |             .text
 540 |             .get_chars_at(cursor)
 541 |             .ok_or_else(|| anyhow::anyhow!("bounds error"))?;
 542 |         iter.reverse();
 543 |         let offset = iter.take_while(|ch| char_is_word(*ch)).count();
 544 |         let start_offset_word = cursor.saturating_sub(offset);
 545 | 
 546 |         let len_chars = doc.text.len_chars();
 547 | 
 548 |         if start_offset_word > len_chars || cursor > len_chars {
 549 |             anyhow::bail!("bounds error")
 550 |         }
 551 | 
 552 |         let mut iter = doc
 553 |             .text
 554 |             .get_chars_at(cursor)
 555 |             .ok_or_else(|| anyhow::anyhow!("bounds error"))?;
 556 |         iter.reverse();
 557 |         let offset = iter
 558 |             .enumerate()
 559 |             .take_while(|(i, ch)| *i < max_chars && char_is_char_prefix(*ch))
 560 |             .count();
 561 |         let start_offset_chars = cursor.saturating_sub(offset);
 562 | 
 563 |         if start_offset_chars > len_chars || cursor > len_chars {
 564 |             anyhow::bail!("bounds error")
 565 |         }
 566 | 
 567 |         let prefix = doc.text.slice(start_offset_word..cursor).as_str();
 568 |         let chars_prefix = doc.text.slice(start_offset_chars..cursor).as_str();
 569 |         Ok((prefix, chars_prefix, doc))
 570 |     }
 571 | 
 572 |     fn completion(&self, prefix: &str, current_doc: &Document) -> Result<HashSet<String>> {
 573 |         // prepare search pattern
 574 |         let ac = ac_searcher(prefix)?;
 575 |         let mut result = HashSet::with_capacity(self.settings.max_completion_items);
 576 | 
 577 |         // search in current doc at first
 578 |         search(
 579 |             prefix,
 580 |             &current_doc.text,
 581 |             &ac,
 582 |             self.settings.max_completion_items,
 583 |             &mut result,
 584 |         )?;
 585 |         if result.len() >= self.settings.max_completion_items {
 586 |             return Ok(result);
 587 |         }
 588 | 
 589 |         for doc in self.docs.values().filter(|doc| doc.uri != current_doc.uri) {
 590 |             search(
 591 |                 prefix,
 592 |                 &doc.text,
 593 |                 &ac,
 594 |                 self.settings.max_completion_items,
 595 |                 &mut result,
 596 |             )?;
 597 |             if result.len() >= self.settings.max_completion_items {
 598 |                 return Ok(result);
 599 |             }
 600 |         }
 601 | 
 602 |         Ok(result)
 603 |     }
 604 | 
 605 |     fn words(&self, prefix: &str, doc: &Document) -> impl Iterator<Item = CompletionItem> {
 606 |         match self.completion(prefix, doc) {
 607 |             Ok(words) => words.into_iter(),
 608 |             Err(e) => {
 609 |                 tracing::error!("On complete by words: {e}");
 610 |                 HashSet::new().into_iter()
 611 |             }
 612 |         }
 613 |         .map(|word| CompletionItem {
 614 |             label: word,
 615 |             kind: Some(CompletionItemKind::TEXT),
 616 |             ..Default::default()
 617 |         })
 618 |     }
 619 | 
 620 |     fn snippets<'a>(
 621 |         &'a self,
 622 |         prefix: &'a str,
 623 |         filter_text_prefix: &'a str,
 624 |         exact_match: bool,
 625 |         doc: &'a Document,
 626 |         params: &'a CompletionParams,
 627 |     ) -> impl Iterator<Item = CompletionItem> + 'a {
 628 |         self.snippets
 629 |             .iter()
 630 |             .filter(move |s| {
 631 |                 let filter_by_scope = if let Some(scope) = &s.scope {
 632 |                     scope.is_empty() | scope.contains(&doc.language_id)
 633 |                 } else {
 634 |                     true
 635 |                 };
 636 |                 if !filter_by_scope {
 637 |                     return false;
 638 |                 }
 639 |                 if exact_match {
 640 |                     caseless::default_caseless_match_str(s.prefix.as_str(), prefix)
 641 |                 } else {
 642 |                     starts_with(s.prefix.as_str(), prefix)
 643 |                 }
 644 |             })
 645 |             .map(move |s| {
 646 |                 let line = params.text_document_position.position.line;
 647 |                 let start = params.text_document_position.position.character - prefix.len() as u32;
 648 |                 let replace_end = params.text_document_position.position.character;
 649 |                 let range = Range {
 650 |                     start: Position {
 651 |                         line,
 652 |                         character: start,
 653 |                     },
 654 |                     end: Position {
 655 |                         line,
 656 |                         character: replace_end,
 657 |                     },
 658 |                 };
 659 |                 CompletionItem {
 660 |                     label: s.prefix.to_owned(),
 661 |                     sort_text: Some(s.prefix.to_string()),
 662 |                     filter_text: Some(if filter_text_prefix.is_empty() {
 663 |                         s.prefix.to_string()
 664 |                     } else {
 665 |                         filter_text_prefix.to_string()
 666 |                     }),
 667 |                     kind: Some(CompletionItemKind::SNIPPET),
 668 |                     detail: Some(s.body.to_string()),
 669 |                     documentation: Some(if let Some(description) = &s.description {
 670 |                         Documentation::MarkupContent(MarkupContent {
 671 |                             kind: MarkupKind::Markdown,
 672 |                             value: format!(
 673 |                                 "{description}\n```{}\n{}\n```",
 674 |                                 doc.language_id, s.body
 675 |                             ),
 676 |                         })
 677 |                     } else {
 678 |                         Documentation::String(s.body.to_string())
 679 |                     }),
 680 |                     text_edit: Some(CompletionTextEdit::InsertAndReplace(InsertReplaceEdit {
 681 |                         replace: range,
 682 |                         insert: range,
 683 |                         new_text: s.body.to_string(),
 684 |                     })),
 685 |                     insert_text_format: Some(InsertTextFormat::SNIPPET),
 686 |                     ..Default::default()
 687 |                 }
 688 |             })
 689 |             .take(self.settings.max_completion_items)
 690 |     }
 691 | 
 692 |     fn snippets_by_word_tail<'a>(
 693 |         &'a self,
 694 |         chars_prefix: &'a str,
 695 |         doc: &'a Document,
 696 |         params: &'a CompletionParams,
 697 |     ) -> impl Iterator<Item = CompletionItem> + 'a {
 698 |         let mut chars_snippets: Vec<CompletionItem> = Vec::new();
 699 | 
 700 |         for index in 0..=chars_prefix.len() {
 701 |             let Some(part) = chars_prefix.get(index..) else {
 702 |                 continue;
 703 |             };
 704 |             if part.is_empty() {
 705 |                 break;
 706 |             }
 707 |             // try to find tail for prefix to start completion
 708 |             if part.len() > self.max_snippet_input_prefix_len {
 709 |                 continue;
 710 |             }
 711 |             if part.len() < self.settings.min_chars_prefix_len {
 712 |                 break;
 713 |             }
 714 |             chars_snippets.extend(self.snippets(part, chars_prefix, false, doc, params));
 715 |             if chars_snippets.len() >= self.settings.max_completion_items {
 716 |                 break;
 717 |             }
 718 |         }
 719 | 
 720 |         chars_snippets.into_iter()
 721 |     }
 722 | 
 723 |     fn unicode_input(
 724 |         &self,
 725 |         word_prefix: &str,
 726 |         chars_prefix: &str,
 727 |         params: &CompletionParams,
 728 |     ) -> impl Iterator<Item = CompletionItem> {
 729 |         let mut chars_snippets: Vec<CompletionItem> = Vec::new();
 730 | 
 731 |         for index in 0..=chars_prefix.len() {
 732 |             let Some(part) = chars_prefix.get(index..) else {
 733 |                 continue;
 734 |             };
 735 |             if part.is_empty() {
 736 |                 break;
 737 |             }
 738 |             // try to find tail for prefix to start completion
 739 |             if part.len() > self.max_unicode_input_prefix_len {
 740 |                 continue;
 741 |             }
 742 |             if part.len() < self.settings.min_chars_prefix_len {
 743 |                 break;
 744 |             }
 745 | 
 746 |             let items = self
 747 |                 .unicode_input
 748 |                 .iter()
 749 |                 .filter_map(|s| {
 750 |                     if !starts_with(&s.prefix, part) {
 751 |                         return None;
 752 |                     }
 753 |                     tracing::info!(
 754 |                         "Chars prefix: {} index: {}, part: {} {s:?}",
 755 |                         chars_prefix,
 756 |                         index,
 757 |                         part
 758 |                     );
 759 |                     let line = params.text_document_position.position.line;
 760 |                     let start =
 761 |                         params.text_document_position.position.character - part.len() as u32;
 762 |                     let replace_end = params.text_document_position.position.character;
 763 |                     let range = Range {
 764 |                         start: Position {
 765 |                             line,
 766 |                             character: start,
 767 |                         },
 768 |                         end: Position {
 769 |                             line,
 770 |                             character: replace_end,
 771 |                         },
 772 |                     };
 773 |                     Some(CompletionItem {
 774 |                         label: s.body.to_string(),
 775 |                         filter_text: format!("{word_prefix}{}", s.prefix).into(),
 776 |                         kind: Some(CompletionItemKind::TEXT),
 777 |                         documentation: Documentation::String(s.prefix.to_string()).into(),
 778 |                         text_edit: Some(CompletionTextEdit::InsertAndReplace(InsertReplaceEdit {
 779 |                             replace: range,
 780 |                             insert: range,
 781 |                             new_text: s.body.to_string(),
 782 |                         })),
 783 |                         ..Default::default()
 784 |                     })
 785 |                 })
 786 |                 .take(self.settings.max_completion_items - chars_snippets.len());
 787 |             chars_snippets.extend(items);
 788 |             if chars_snippets.len() >= self.settings.max_completion_items {
 789 |                 break;
 790 |             }
 791 |         }
 792 | 
 793 |         chars_snippets
 794 |             .into_iter()
 795 |             .enumerate()
 796 |             .map(move |(index, item)| CompletionItem {
 797 |                 sort_text: format!("{:0width$}", index, width = 2).into(),
 798 |                 ..item
 799 |             })
 800 |     }
 801 | 
 802 |     fn paths(
 803 |         &self,
 804 |         word_prefix: &str,
 805 |         chars_prefix: &str,
 806 |         params: &CompletionParams,
 807 |         current_document: &Document,
 808 |     ) -> impl Iterator<Item = CompletionItem> {
 809 |         // check is it path
 810 |         if !chars_prefix.contains(std::path::MAIN_SEPARATOR) {
 811 |             return Vec::new().into_iter();
 812 |         }
 813 | 
 814 |         let Some(first_char) = chars_prefix.chars().nth(0) else {
 815 |             return Vec::new().into_iter();
 816 |         };
 817 |         let Some(last_char) = chars_prefix.chars().last() else {
 818 |             return Vec::new().into_iter();
 819 |         };
 820 | 
 821 |         // sanitize surround chars
 822 |         let chars_prefix = if first_char.is_alphabetic()
 823 |             || first_char == std::path::MAIN_SEPARATOR
 824 |             || first_char == '~'
 825 |             || first_char == '.'
 826 |         {
 827 |             chars_prefix
 828 |         } else {
 829 |             &chars_prefix[1..]
 830 |         };
 831 | 
 832 |         let chars_prefix_len = chars_prefix.len() as u32;
 833 |         let document_path = current_document.uri.path();
 834 |         let path_state = PathState::new(chars_prefix, &self.home_dir, document_path);
 835 | 
 836 |         let chars_prefix = path_state.expand(chars_prefix);
 837 | 
 838 |         // build path
 839 |         let path = std::path::Path::new(chars_prefix.as_ref());
 840 | 
 841 |         // normalize filename
 842 |         let (filename, parent_dir) = if last_char == std::path::MAIN_SEPARATOR {
 843 |             (String::new(), path)
 844 |         } else {
 845 |             let Some(filename) = path.file_name().and_then(|f| f.to_str()) else {
 846 |                 return Vec::new().into_iter();
 847 |             };
 848 |             let Some(parent_dir) = path.parent() else {
 849 |                 return Vec::new().into_iter();
 850 |             };
 851 |             (filename.to_lowercase(), parent_dir)
 852 |         };
 853 | 
 854 |         let items = match parent_dir.read_dir() {
 855 |             Ok(items) => items,
 856 |             Err(e) => {
 857 |                 tracing::warn!("On read dir {parent_dir:?}: {e}");
 858 |                 return Vec::new().into_iter();
 859 |             }
 860 |         };
 861 | 
 862 |         items
 863 |             .into_iter()
 864 |             .filter_map(|item| item.ok())
 865 |             .filter_map(|item| {
 866 |                 // convert to regular &str
 867 |                 let fname = item.file_name();
 868 |                 let item_filename = fname.to_str()?;
 869 |                 let item_filename = item_filename.to_lowercase();
 870 |                 if !filename.is_empty() && !item_filename.starts_with(&filename) {
 871 |                     return None;
 872 |                 }
 873 | 
 874 |                 // use full path
 875 |                 let path = item.path();
 876 |                 let full_path = path.to_str()?;
 877 | 
 878 |                 // fold back
 879 |                 let full_path = path_state.fold(full_path);
 880 | 
 881 |                 let line = params.text_document_position.position.line;
 882 |                 let start = params.text_document_position.position.character - chars_prefix_len;
 883 |                 let replace_end = params.text_document_position.position.character;
 884 |                 let range = Range {
 885 |                     start: Position {
 886 |                         line,
 887 |                         character: start,
 888 |                     },
 889 |                     end: Position {
 890 |                         line,
 891 |                         character: replace_end,
 892 |                     },
 893 |                 };
 894 |                 Some(CompletionItem {
 895 |                     label: full_path.to_string(),
 896 |                     sort_text: Some(full_path.to_string()),
 897 |                     filter_text: Some(format!("{word_prefix}{full_path}")),
 898 |                     kind: Some(if path.is_dir() {
 899 |                         CompletionItemKind::FOLDER
 900 |                     } else {
 901 |                         CompletionItemKind::FILE
 902 |                     }),
 903 |                     text_edit: Some(CompletionTextEdit::InsertAndReplace(InsertReplaceEdit {
 904 |                         replace: range,
 905 |                         insert: range,
 906 |                         new_text: full_path.to_string(),
 907 |                     })),
 908 |                     ..Default::default()
 909 |                 })
 910 |             })
 911 |             .take(self.settings.max_completion_items)
 912 |             .collect::<Vec<_>>()
 913 |             .into_iter()
 914 |     }
 915 | 
 916 |     #[cfg(feature = "citation")]
 917 |     fn citations<'a>(
 918 |         &'a self,
 919 |         word_prefix: &str,
 920 |         chars_prefix: &str,
 921 |         doc: &'a Document,
 922 |         params: &CompletionParams,
 923 |     ) -> impl Iterator<Item = CompletionItem> {
 924 |         let mut items: Vec<CompletionItem> = Vec::new();
 925 | 
 926 |         tracing::debug!("Citation word_prefix: {word_prefix}, chars_prefix: {chars_prefix}");
 927 | 
 928 |         let Some(re) = &self.citation_bibliography_re else {
 929 |             tracing::warn!("Citation bibliography regex empty or invalid");
 930 |             return Vec::new().into_iter();
 931 |         };
 932 | 
 933 |         let Some(slice) = doc.text.get_slice(..) else {
 934 |             tracing::warn!("Failed to get rope slice");
 935 |             return Vec::new().into_iter();
 936 |         };
 937 | 
 938 |         let cursor = RopeyCursor::new(slice);
 939 | 
 940 |         for span in re
 941 |             .captures_iter(Input::new(cursor))
 942 |             .filter_map(|c| c.get_group(1))
 943 |         {
 944 |             if items.len() >= self.settings.max_completion_items {
 945 |                 break;
 946 |             }
 947 | 
 948 |             let Some(path) = slice.get_byte_slice(span.start..span.end) else {
 949 |                 tracing::error!("Failed to get path by span");
 950 |                 continue;
 951 |             };
 952 | 
 953 |             // TODO any ways get &str from whole RopeSlice
 954 |             let path = path.to_string();
 955 | 
 956 |             let path = if path.contains("~") {
 957 |                 path.replacen('~', &self.home_dir, 1)
 958 |             } else {
 959 |                 path
 960 |             };
 961 | 
 962 |             // TODO read and parse only if file changed
 963 |             tracing::debug!("Citation try to read: {path}");
 964 |             let bib = match std::fs::read_to_string(&path) {
 965 |                 Err(e) => {
 966 |                     tracing::error!("Failed to read file {path}: {e}");
 967 |                     continue;
 968 |                 }
 969 |                 Ok(r) => r,
 970 |             };
 971 | 
 972 |             let bib = match biblatex::Bibliography::parse(&bib) {
 973 |                 Err(e) => {
 974 |                     tracing::error!("Failed to parse bib file {path}: {e}");
 975 |                     continue;
 976 |                 }
 977 |                 Ok(r) => r,
 978 |             };
 979 | 
 980 |             items.extend(
 981 |                 bib.iter()
 982 |                     .filter_map(|b| {
 983 |                         let matched = starts_with(&b.key, word_prefix);
 984 |                         tracing::debug!(
 985 |                             "Citation from file: {path} prefix: {word_prefix} key: {} - match: {}",
 986 |                             b.key,
 987 |                             matched,
 988 |                         );
 989 |                         if !matched {
 990 |                             return None;
 991 |                         }
 992 |                         let line = params.text_document_position.position.line;
 993 |                         let start = params.text_document_position.position.character
 994 |                             - word_prefix.len() as u32;
 995 |                         let replace_end = params.text_document_position.position.character;
 996 |                         let range = Range {
 997 |                             start: Position {
 998 |                                 line,
 999 |                                 character: start,
1000 |                             },
1001 |                             end: Position {
1002 |                                 line,
1003 |                                 character: replace_end,
1004 |                             },
1005 |                         };
1006 |                         let documentation = {
1007 |                             let entry_type = b.entry_type.to_string();
1008 |                             let title = b
1009 |                                 .title()
1010 |                                 .ok()?
1011 |                                 .iter()
1012 |                                 .map(|chunk| chunk.v.get())
1013 |                                 .collect::<Vec<_>>()
1014 |                                 .join("");
1015 |                             let authors = b
1016 |                                 .author()
1017 |                                 .ok()?
1018 |                                 .into_iter()
1019 |                                 .map(|person| person.to_string())
1020 |                                 .collect::<Vec<_>>()
1021 |                                 .join(",");
1022 | 
1023 |                             let date = match b.date() {
1024 |                                 Ok(d) => match d {
1025 |                                     biblatex::PermissiveType::Typed(date) => date.to_chunks(),
1026 |                                     biblatex::PermissiveType::Chunks(v) => v,
1027 |                                 }
1028 |                                 .iter()
1029 |                                 .map(|chunk| chunk.v.get())
1030 |                                 .collect::<Vec<_>>()
1031 |                                 .join(""),
1032 |                                 Err(e) => {
1033 |                                     tracing::error!("On parse date field on entry {b:?}: {e}");
1034 |                                     String::new()
1035 |                                 }
1036 |                             };
1037 | 
1038 |                             Some(format!(
1039 |                                 "# {title:?}\n*{authors}*\n\n{entry_type}{}",
1040 |                                 if date.is_empty() {
1041 |                                     date
1042 |                                 } else {
1043 |                                     format!(", {date}")
1044 |                                 }
1045 |                             ))
1046 |                         };
1047 |                         Some(CompletionItem {
1048 |                             label: format!("@{}", b.key),
1049 |                             sort_text: Some(word_prefix.to_string()),
1050 |                             filter_text: Some(word_prefix.to_string()),
1051 |                             kind: Some(CompletionItemKind::REFERENCE),
1052 |                             text_edit: Some(CompletionTextEdit::InsertAndReplace(
1053 |                                 InsertReplaceEdit {
1054 |                                     replace: range,
1055 |                                     insert: range,
1056 |                                     new_text: b.key.to_string(),
1057 |                                 },
1058 |                             )),
1059 |                             documentation: Some(Documentation::MarkupContent(MarkupContent {
1060 |                                 kind: MarkupKind::Markdown,
1061 |                                 value: documentation.unwrap_or_else(|| {
1062 |                                     format!(
1063 |                                         "'''{}'''\n\n*fallback to biblatex format*",
1064 |                                         b.to_biblatex_string()
1065 |                                     )
1066 |                                 }),
1067 |                             })),
1068 |                             ..Default::default()
1069 |                         })
1070 |                     })
1071 |                     .take(self.settings.max_completion_items - items.len()),
1072 |             );
1073 |         }
1074 | 
1075 |         items.into_iter()
1076 |     }
1077 | 
1078 |     pub async fn start(mut self) {
1079 |         loop {
1080 |             let Some(cmd) = self.rx.recv().await else {
1081 |                 continue;
1082 |             };
1083 | 
1084 |             match cmd {
1085 |                 BackendRequest::NewDoc(params) => {
1086 |                     self.docs.insert(
1087 |                         params.text_document.uri.clone(),
1088 |                         Document {
1089 |                             uri: params.text_document.uri,
1090 |                             text: Rope::from_str(&params.text_document.text),
1091 |                             language_id: params.text_document.language_id,
1092 |                         },
1093 |                     );
1094 |                 }
1095 |                 BackendRequest::SaveDoc(params) => {
1096 |                     if let Err(e) = self.save_doc(params) {
1097 |                         tracing::error!("Error on save doc: {e}");
1098 |                     }
1099 |                 }
1100 |                 BackendRequest::ChangeDoc(params) => {
1101 |                     if let Err(e) = self.change_doc(params) {
1102 |                         tracing::error!("Error on change doc: {e}");
1103 |                     }
1104 |                 }
1105 |                 BackendRequest::ChangeConfiguration(params) => {
1106 |                     if let Err(e) = self.change_configuration(params) {
1107 |                         tracing::error!("Error on change configuration: {e}");
1108 |                     }
1109 |                 }
1110 |                 BackendRequest::CompletionRequest((tx, params)) => {
1111 |                     let now = std::time::Instant::now();
1112 | 
1113 |                     let Ok((prefix, chars_prefix, doc)) =
1114 |                         self.get_prefix(self.settings.max_chars_prefix_len, &params)
1115 |                     else {
1116 |                         if tx
1117 |                             .send(Err(anyhow::anyhow!("Failed to get prefix")))
1118 |                             .is_err()
1119 |                         {
1120 |                             tracing::error!("Error on send completion response");
1121 |                         }
1122 |                         continue;
1123 |                     };
1124 | 
1125 |                     let Some(chars_prefix) = chars_prefix else {
1126 |                         if tx
1127 |                             .send(Err(anyhow::anyhow!("Failed to get char prefix")))
1128 |                             .is_err()
1129 |                         {
1130 |                             tracing::error!("Error on send completion response");
1131 |                         }
1132 |                         continue;
1133 |                     };
1134 | 
1135 |                     if chars_prefix.is_empty() || chars_prefix.starts_with(' ') {
1136 |                         if tx
1137 |                             .send(Ok(BackendResponse::CompletionResponse(
1138 |                                 CompletionResponse::Array(Vec::new()),
1139 |                             )))
1140 |                             .is_err()
1141 |                         {
1142 |                             tracing::error!("Error on send completion response");
1143 |                         }
1144 |                         continue;
1145 |                     };
1146 | 
1147 |                     let base_completion = || {
1148 |                         Vec::new()
1149 |                             .into_iter()
1150 |                             // snippets first
1151 |                             .chain(
1152 |                                 match (
1153 |                                     self.settings.feature_snippets,
1154 |                                     self.settings.snippets_inline_by_word_tail,
1155 |                                     self.settings.snippets_first,
1156 |                                     prefix,
1157 |                                 ) {
1158 |                                     (true, true, true, _) if !chars_prefix.is_empty() => {
1159 |                                         Some(self.snippets_by_word_tail(chars_prefix, doc, &params))
1160 |                                     }
1161 |                                     _ => None,
1162 |                                 }
1163 |                                 .into_iter()
1164 |                                 .flatten(),
1165 |                             )
1166 |                             .chain(
1167 |                                 match (
1168 |                                     self.settings.feature_snippets,
1169 |                                     self.settings.snippets_inline_by_word_tail,
1170 |                                     self.settings.snippets_first,
1171 |                                     prefix,
1172 |                                 ) {
1173 |                                     (true, false, true, Some(prefix)) if !prefix.is_empty() => {
1174 |                                         Some(self.snippets(prefix, "", true, doc, &params))
1175 |                                     }
1176 |                                     _ => None,
1177 |                                 }
1178 |                                 .into_iter()
1179 |                                 .flatten(),
1180 |                             )
1181 |                             // words
1182 |                             .chain(
1183 |                                 if let Some(prefix) = prefix {
1184 |                                     if self.settings.feature_words {
1185 |                                         Some(self.words(prefix, doc))
1186 |                                     } else {
1187 |                                         None
1188 |                                     }
1189 |                                 } else {
1190 |                                     None
1191 |                                 }
1192 |                                 .into_iter()
1193 |                                 .flatten(),
1194 |                             )
1195 |                             // snippets last
1196 |                             .chain(
1197 |                                 match (
1198 |                                     self.settings.feature_snippets,
1199 |                                     self.settings.snippets_inline_by_word_tail,
1200 |                                     self.settings.snippets_first,
1201 |                                     prefix,
1202 |                                 ) {
1203 |                                     (true, true, false, _) if !chars_prefix.is_empty() => {
1204 |                                         Some(self.snippets_by_word_tail(chars_prefix, doc, &params))
1205 |                                     }
1206 |                                     _ => None,
1207 |                                 }
1208 |                                 .into_iter()
1209 |                                 .flatten(),
1210 |                             )
1211 |                             .chain(
1212 |                                 match (
1213 |                                     self.settings.feature_snippets,
1214 |                                     self.settings.snippets_inline_by_word_tail,
1215 |                                     self.settings.snippets_first,
1216 |                                     prefix,
1217 |                                 ) {
1218 |                                     (true, false, false, Some(prefix)) if !prefix.is_empty() => {
1219 |                                         Some(self.snippets(prefix, "", false, doc, &params))
1220 |                                     }
1221 |                                     _ => None,
1222 |                                 }
1223 |                                 .into_iter()
1224 |                                 .flatten(),
1225 |                             )
1226 |                             .chain(
1227 |                                 if self.settings.feature_unicode_input {
1228 |                                     Some(self.unicode_input(
1229 |                                         prefix.unwrap_or_default(),
1230 |                                         chars_prefix,
1231 |                                         &params,
1232 |                                     ))
1233 |                                 } else {
1234 |                                     None
1235 |                                 }
1236 |                                 .into_iter()
1237 |                                 .flatten(),
1238 |                             )
1239 |                             .chain(
1240 |                                 if self.settings.feature_paths {
1241 |                                     Some(self.paths(
1242 |                                         prefix.unwrap_or_default(),
1243 |                                         chars_prefix,
1244 |                                         &params,
1245 |                                         doc,
1246 |                                     ))
1247 |                                 } else {
1248 |                                     None
1249 |                                 }
1250 |                                 .into_iter()
1251 |                                 .flatten(),
1252 |                             )
1253 |                             .collect()
1254 |                     };
1255 | 
1256 |                     #[cfg(feature = "citation")]
1257 |                     let results: Vec<CompletionItem> = if self.settings.feature_citations
1258 |                         & chars_prefix.contains(&self.settings.citation_prefix_trigger)
1259 |                     {
1260 |                         self.citations(prefix.unwrap_or_default(), chars_prefix, doc, &params)
1261 |                             .collect()
1262 |                     } else {
1263 |                         base_completion()
1264 |                     };
1265 | 
1266 |                     #[cfg(not(feature = "citation"))]
1267 |                     let results: Vec<CompletionItem> = base_completion();
1268 | 
1269 |                     tracing::debug!(
1270 |                         "completion request by prefix: {prefix:?} chars prefix: {chars_prefix:?} took {:.2}ms with {} result items",
1271 |                         now.elapsed().as_millis(),
1272 |                         results.len(),
1273 |                     );
1274 | 
1275 |                     let response =
1276 |                         BackendResponse::CompletionResponse(CompletionResponse::Array(results));
1277 | 
1278 |                     if tx.send(Ok(response)).is_err() {
1279 |                         tracing::error!("Error on send completion response");
1280 |                     }
1281 |                 }
1282 |             };
1283 |         }
1284 |     }
1285 | }
1286 | 


--------------------------------------------------------------------------------
/src/main.rs:
--------------------------------------------------------------------------------
  1 | use etcetera::base_strategy::{choose_base_strategy, BaseStrategy};
  2 | use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
  3 | use xshell::{cmd, Shell};
  4 | 
  5 | use simple_completion_language_server::{
  6 |     server,
  7 |     snippets::config::{load_snippets, load_unicode_input_from_path},
  8 |     snippets::external::ExternalSnippets,
  9 |     StartOptions,
 10 | };
 11 | 
 12 | async fn serve(start_options: &StartOptions) {
 13 |     let _guard = if let Ok(log_file) = &std::env::var("LOG_FILE") {
 14 |         let log_file = std::path::Path::new(log_file);
 15 |         let file_appender = tracing_appender::rolling::never(
 16 |             log_file
 17 |                 .parent()
 18 |                 .expect("Failed to parse LOG_FILE parent part"),
 19 |             log_file
 20 |                 .file_name()
 21 |                 .expect("Failed to parse LOG_FILE file_name part"),
 22 |         );
 23 |         let (non_blocking, _guard) = tracing_appender::non_blocking(file_appender);
 24 |         tracing_subscriber::registry()
 25 |             .with(tracing_subscriber::EnvFilter::new(
 26 |                 std::env::var("RUST_LOG")
 27 |                     .unwrap_or_else(|_| "info,simple-completion-language-server=info".into()),
 28 |             ))
 29 |             .with(tracing_subscriber::fmt::layer().with_writer(non_blocking))
 30 |             .init();
 31 |         Some(_guard)
 32 |     } else {
 33 |         None
 34 |     };
 35 | 
 36 |     let stdin = tokio::io::stdin();
 37 |     let stdout = tokio::io::stdout();
 38 | 
 39 |     let snippets = load_snippets(start_options).unwrap_or_else(|e| {
 40 |         tracing::error!("On read snippets: {e}");
 41 |         Vec::new()
 42 |     });
 43 | 
 44 |     let unicode_input = load_unicode_input_from_path(&start_options.unicode_input_path)
 45 |         .unwrap_or_else(|e| {
 46 |             tracing::error!("On read 'unicode input' config: {e}");
 47 |             Default::default()
 48 |         });
 49 | 
 50 |     server::start(
 51 |         stdin,
 52 |         stdout,
 53 |         snippets,
 54 |         unicode_input,
 55 |         start_options.home_dir.clone(),
 56 |     )
 57 |     .await;
 58 | }
 59 | 
 60 | fn help() {
 61 |     println!(
 62 |         "usage:
 63 | simple-completion-language-server fetch-external-snippets
 64 |     Fetch external snippets (git clone or git pull).
 65 | 
 66 | simple-completion-language-server validate-snippets
 67 |     Read all snippets to ensure correctness.
 68 | 
 69 | simple-completion-language-server validate-unicode-input
 70 |     Read all unicode-input to ensure correctness.
 71 | 
 72 | simple-completion-language-server
 73 |     Start language server protocol on stdin+stdout."
 74 |     );
 75 | }
 76 | 
 77 | fn fetch_external_snippets(start_options: &StartOptions) -> anyhow::Result<()> {
 78 |     tracing::info!(
 79 |         "Try read config from: {:?}",
 80 |         start_options.external_snippets_config_path
 81 |     );
 82 | 
 83 |     let path = std::path::Path::new(&start_options.external_snippets_config_path);
 84 | 
 85 |     if !path.exists() {
 86 |         return Ok(());
 87 |     }
 88 | 
 89 |     let Some(base_path) = path.parent() else {
 90 |         anyhow::bail!("Failed to get base path")
 91 |     };
 92 | 
 93 |     let base_path = base_path.join("external-snippets");
 94 | 
 95 |     let content = std::fs::read_to_string(path)?;
 96 | 
 97 |     let sources = toml::from_str::<ExternalSnippets>(&content)
 98 |         .map(|sc| sc.sources)
 99 |         .map_err(|e| anyhow::anyhow!(e))?;
100 | 
101 |     let sh = Shell::new()?;
102 |     for source in sources {
103 |         let git_repo = &source.git;
104 |         let destination_path = base_path.join(source.destination_path()?);
105 | 
106 |         // TODO don't fetch full history?
107 |         if destination_path.exists() {
108 |             sh.change_dir(&destination_path);
109 |             tracing::info!("Try update: {:?}", destination_path);
110 |             cmd!(sh, "git pull --rebase").run()?;
111 |         } else {
112 |             tracing::info!("Try clone {} to {:?}", git_repo, destination_path);
113 |             sh.create_dir(&destination_path)?;
114 |             cmd!(sh, "git clone {git_repo} {destination_path}").run()?;
115 |         }
116 |     }
117 | 
118 |     Ok(())
119 | }
120 | 
121 | fn validate_snippets(start_options: &StartOptions) -> anyhow::Result<()> {
122 |     let snippets = load_snippets(start_options)?;
123 |     tracing::info!("Successful. Total: {}", snippets.len());
124 |     Ok(())
125 | }
126 | 
127 | fn validate_unicode_input(start_options: &StartOptions) -> anyhow::Result<()> {
128 |     let unicode_input = load_unicode_input_from_path(&start_options.unicode_input_path)?;
129 |     tracing::info!("Successful. Total: {}", unicode_input.len());
130 |     Ok(())
131 | }
132 | 
133 | #[tokio::main]
134 | async fn main() {
135 |     let args: Vec<String> = std::env::args().collect();
136 | 
137 |     let strategy = choose_base_strategy().expect("Unable to find the config directory!");
138 |     let mut config_dir = strategy.config_dir();
139 |     let config_subdirectory_name =
140 |         std::env::var("SCLS_CONFIG_SUBDIRECTORY").unwrap_or_else(|_| "helix".to_owned());
141 |     config_dir.push(config_subdirectory_name);
142 | 
143 |     let start_options = StartOptions {
144 |         home_dir: etcetera::home_dir()
145 |             .expect("Unable to get home dir!")
146 |             .to_str()
147 |             .expect("Unable to get home dir as string!")
148 |             .to_string(),
149 |         snippets_path: std::env::var("SNIPPETS_PATH")
150 |             .map(std::path::PathBuf::from)
151 |             .unwrap_or_else(|_| {
152 |                 let mut filepath = config_dir.clone();
153 |                 filepath.push("snippets");
154 |                 filepath
155 |             }),
156 |         external_snippets_config_path: std::env::var("EXTERNAL_SNIPPETS_CONFIG")
157 |             .map(std::path::PathBuf::from)
158 |             .unwrap_or_else(|_| {
159 |                 let mut filepath = config_dir.clone();
160 |                 filepath.push("external-snippets.toml");
161 |                 filepath
162 |             }),
163 |         unicode_input_path: std::env::var("UNICODE_INPUT_PATH")
164 |             .map(std::path::PathBuf::from)
165 |             .unwrap_or_else(|_| {
166 |                 let mut filepath = config_dir.clone();
167 |                 filepath.push("unicode-input");
168 |                 filepath
169 |             }),
170 |     };
171 | 
172 |     match args.len() {
173 |         2.. => {
174 |             tracing_subscriber::registry()
175 |                 .with(tracing_subscriber::EnvFilter::new(
176 |                     std::env::var("RUST_LOG")
177 |                         .unwrap_or_else(|_| "info,simple-completion-language-server=info".into()),
178 |                 ))
179 |                 .with(tracing_subscriber::fmt::layer())
180 |                 .init();
181 | 
182 |             let cmd = args[1].parse::<String>().expect("command required");
183 | 
184 |             if cmd.contains("-h") || cmd.contains("help") {
185 |                 help();
186 |                 return;
187 |             }
188 | 
189 |             match cmd.as_str() {
190 |                 "fetch-external-snippets" => fetch_external_snippets(&start_options)
191 |                     .expect("Failed to fetch external snippets"),
192 |                 "validate-snippets" => {
193 |                     validate_snippets(&start_options).expect("Failed to validate snippets")
194 |                 }
195 |                 "validate-unicode-input" => validate_unicode_input(&start_options)
196 |                     .expect("Failed to validate 'unicode input' config"),
197 |                 _ => help(),
198 |             }
199 |         }
200 |         _ => serve(&start_options).await,
201 |     };
202 | }
203 | 


--------------------------------------------------------------------------------
/src/server.rs:
--------------------------------------------------------------------------------
  1 | use crate::{
  2 |     snippets::{Snippet, UnicodeInputItem},
  3 |     BackendRequest, BackendResponse, BackendState,
  4 | };
  5 | use tokio::io::{AsyncRead, AsyncWrite};
  6 | use tokio::sync::{mpsc, oneshot};
  7 | use tower_lsp::jsonrpc::Result;
  8 | use tower_lsp::lsp_types::*;
  9 | use tower_lsp::{Client, LanguageServer, LspService, Server};
 10 | 
 11 | #[derive(Debug)]
 12 | pub struct Backend {
 13 |     client: Client,
 14 |     tx: mpsc::UnboundedSender<BackendRequest>,
 15 |     _task: tokio::task::JoinHandle<()>,
 16 | }
 17 | 
 18 | impl Backend {
 19 |     async fn log_info(&self, message: &str) {
 20 |         tracing::info!(message);
 21 |         self.client.log_message(MessageType::INFO, message).await;
 22 |     }
 23 |     async fn log_err(&self, message: &str) {
 24 |         tracing::error!(message);
 25 |         self.client.log_message(MessageType::ERROR, message).await;
 26 |     }
 27 |     async fn send_request(&self, request: BackendRequest) -> anyhow::Result<()> {
 28 |         if self.tx.send(request).is_err() {
 29 |             self.log_err("error on send request").await;
 30 |             anyhow::bail!("Failed to send request");
 31 |         }
 32 |         Ok(())
 33 |     }
 34 | }
 35 | 
 36 | #[tower_lsp::async_trait]
 37 | impl LanguageServer for Backend {
 38 |     async fn initialize(&self, _: InitializeParams) -> Result<InitializeResult> {
 39 |         Ok(InitializeResult {
 40 |             capabilities: ServerCapabilities {
 41 |                 position_encoding: Some(PositionEncodingKind::UTF32),
 42 |                 text_document_sync: Some(TextDocumentSyncCapability::Kind(
 43 |                     TextDocumentSyncKind::INCREMENTAL,
 44 |                 )),
 45 |                 completion_provider: Some(CompletionOptions {
 46 |                     resolve_provider: Some(false),
 47 |                     trigger_characters: Some(vec![std::path::MAIN_SEPARATOR_STR.to_string()]),
 48 |                     ..CompletionOptions::default()
 49 |                 }),
 50 |                 ..Default::default()
 51 |             },
 52 |             ..Default::default()
 53 |         })
 54 |     }
 55 | 
 56 |     async fn initialized(&self, _: InitializedParams) {
 57 |         self.log_info("server initialized!").await;
 58 |     }
 59 | 
 60 |     async fn shutdown(&self) -> Result<()> {
 61 |         Ok(())
 62 |     }
 63 | 
 64 |     async fn did_open(&self, params: DidOpenTextDocumentParams) {
 65 |         let _ = self.send_request(BackendRequest::NewDoc(params)).await;
 66 |     }
 67 | 
 68 |     async fn did_save(&self, params: DidSaveTextDocumentParams) {
 69 |         tracing::debug!("Did save: {params:?}");
 70 |         let _ = self.send_request(BackendRequest::SaveDoc(params)).await;
 71 |     }
 72 | 
 73 |     async fn did_change(&self, params: DidChangeTextDocumentParams) {
 74 |         tracing::debug!("Did change: {params:?}");
 75 |         let _ = self.send_request(BackendRequest::ChangeDoc(params)).await;
 76 |     }
 77 | 
 78 |     async fn did_change_configuration(&self, params: DidChangeConfigurationParams) {
 79 |         self.log_info(&format!("Did change configuration: {params:?}"))
 80 |             .await;
 81 |         let _ = self
 82 |             .send_request(BackendRequest::ChangeConfiguration(params))
 83 |             .await;
 84 |     }
 85 | 
 86 |     async fn completion(&self, params: CompletionParams) -> Result<Option<CompletionResponse>> {
 87 |         tracing::debug!("Completion: {params:?}");
 88 |         let (tx, rx) = oneshot::channel::<anyhow::Result<BackendResponse>>();
 89 | 
 90 |         self.send_request(BackendRequest::CompletionRequest((tx, params)))
 91 |             .await
 92 |             .map_err(|_| tower_lsp::jsonrpc::Error::internal_error())?;
 93 | 
 94 |         let Ok(result) = rx.await else {
 95 |             self.log_err("Error on receive completion response").await;
 96 |             return Err(tower_lsp::jsonrpc::Error::internal_error());
 97 |         };
 98 | 
 99 |         match result {
100 |             Ok(BackendResponse::CompletionResponse(r)) => Ok(Some(r)),
101 |             Err(e) => {
102 |                 self.log_err(&format!("Completion error: {e}")).await;
103 |                 return Err(tower_lsp::jsonrpc::Error::internal_error());
104 |             }
105 |         }
106 |     }
107 | 
108 |     // mock completionItem/resolve
109 |     async fn completion_resolve(&self, params: CompletionItem) -> Result<CompletionItem> {
110 |         Ok(params)
111 |     }
112 | }
113 | 
114 | pub async fn start<I, O>(
115 |     read: I,
116 |     write: O,
117 |     snippets: Vec<Snippet>,
118 |     unicode_input: Vec<UnicodeInputItem>,
119 |     home_dir: String,
120 | ) where
121 |     I: AsyncRead + Unpin,
122 |     O: AsyncWrite,
123 | {
124 |     let (tx, backend_state) = BackendState::new(home_dir, snippets, unicode_input).await;
125 | 
126 |     let task = tokio::spawn(backend_state.start());
127 | 
128 |     let (service, socket) = LspService::new(|client| Backend {
129 |         client,
130 |         tx,
131 |         _task: task,
132 |     });
133 |     Server::new(read, write, socket).serve(service).await;
134 | }
135 | 


--------------------------------------------------------------------------------
/src/snippets/config.rs:
--------------------------------------------------------------------------------
  1 | use crate::snippets::external::ExternalSnippets;
  2 | use crate::snippets::vscode::VSSnippetsConfig;
  3 | use crate::StartOptions;
  4 | use anyhow::Result;
  5 | use serde::Deserialize;
  6 | use std::collections::{BTreeMap, HashMap};
  7 | use std::fs;
  8 | use std::path::Path;
  9 | 
 10 | #[derive(Deserialize)]
 11 | pub struct SnippetsConfig {
 12 |     pub snippets: Vec<Snippet>,
 13 | }
 14 | 
 15 | #[derive(Debug, Deserialize)]
 16 | pub struct Snippet {
 17 |     pub scope: Option<Vec<String>>,
 18 |     pub prefix: String,
 19 |     pub body: String,
 20 |     pub description: Option<String>,
 21 | }
 22 | 
 23 | #[derive(Debug, Deserialize)]
 24 | pub struct UnicodeInputItem {
 25 |     pub prefix: String,
 26 |     pub body: String,
 27 | }
 28 | 
 29 | #[derive(Deserialize)]
 30 | pub struct UnicodeInputConfig {
 31 |     #[serde(flatten)]
 32 |     pub inner: BTreeMap<String, String>,
 33 | }
 34 | 
 35 | fn walk_dir<F>(dir: &Path, filter: &F, files: &mut Vec<std::path::PathBuf>)
 36 | where
 37 |     F: Fn(&Path) -> bool,
 38 | {
 39 |     if let Ok(entries) = fs::read_dir(dir) {
 40 |         for entry in entries.flatten() {
 41 |             let path = entry.path();
 42 |             if path.is_dir() {
 43 |                 walk_dir(&path, filter, files);
 44 |             } else if filter(&path) {
 45 |                 files.push(path);
 46 |             }
 47 |         }
 48 |     }
 49 | }
 50 | 
 51 | pub fn load_snippets(start_options: &StartOptions) -> Result<Vec<Snippet>> {
 52 |     let mut snippets = load_snippets_from_path(&start_options.snippets_path, &None)?;
 53 | 
 54 |     tracing::info!(
 55 |         "Try read config from: {:?}",
 56 |         start_options.external_snippets_config_path
 57 |     );
 58 | 
 59 |     let path = std::path::Path::new(&start_options.external_snippets_config_path);
 60 | 
 61 |     if path.exists() {
 62 |         let Some(base_path) = path.parent() else {
 63 |             anyhow::bail!("Failed to get base path")
 64 |         };
 65 | 
 66 |         let base_path = base_path.join("external-snippets");
 67 | 
 68 |         let content = std::fs::read_to_string(path)?;
 69 | 
 70 |         let sources = toml::from_str::<ExternalSnippets>(&content)
 71 |             .map(|sc| sc.sources)
 72 |             .map_err(|e| anyhow::anyhow!(e))?;
 73 | 
 74 |         for source in sources {
 75 |             let source_name = source.name.as_ref().unwrap_or(&source.git);
 76 | 
 77 |             let source_dst = source.destination_path()?;
 78 | 
 79 |             if source.paths.is_empty() {
 80 |                 let mut files = Vec::new();
 81 |                 walk_dir(
 82 |                     &base_path.join(&source_dst),
 83 |                     &|filepath| {
 84 |                         let Some(ext) = filepath.extension() else {
 85 |                             return false;
 86 |                         };
 87 |                         ext == "json" || ext == "toml"
 88 |                     },
 89 |                     &mut files,
 90 |                 );
 91 |                 snippets.extend(
 92 |                     files
 93 |                         .into_iter()
 94 |                         .filter_map(|filepath| match load_snippets_from_path(&filepath, &None) {
 95 |                             Ok(s) => s
 96 |                                 .into_iter()
 97 |                                 .map(|mut s| {
 98 |                                     s.description = Some(format!(
 99 |                                         "{source_name}\n\n{}",
100 |                                         s.description.unwrap_or_default(),
101 |                                     ));
102 |                                     s
103 |                                 })
104 |                                 .into(),
105 |                             Err(e) => {
106 |                                 tracing::warn!(
107 |                                     "Skip. failed to load snippets from: {filepath:?} - {e}"
108 |                                 );
109 |                                 None
110 |                             }
111 |                         })
112 |                         .flatten()
113 |                         .collect::<Vec<_>>(),
114 |                 );
115 |             } else {
116 |                 for item in &source.paths {
117 |                     snippets.extend(
118 |                         load_snippets_from_path(
119 |                             &base_path.join(&source_dst).join(&item.path),
120 |                             &item.scope,
121 |                         )?
122 |                         .into_iter()
123 |                         .map(|mut s| {
124 |                             s.description = Some(format!(
125 |                                 "{source_name}\n\n{}",
126 |                                 s.description.unwrap_or_default(),
127 |                             ));
128 |                             s
129 |                         })
130 |                         .collect::<Vec<_>>(),
131 |                     );
132 |                 }
133 |             }
134 |         }
135 |     }
136 | 
137 |     snippets.sort_unstable_by(|a, b| a.prefix.cmp(&b.prefix));
138 | 
139 |     Ok(snippets)
140 | }
141 | 
142 | pub fn load_snippets_from_file(
143 |     path: &std::path::PathBuf,
144 |     scope: &Option<Vec<String>>,
145 | ) -> Result<Vec<Snippet>> {
146 |     let scope = if scope.is_none() {
147 |         path.file_stem()
148 |             .and_then(|v| v.to_str())
149 |             .filter(|v| *v != "snippets")
150 |             .map(|v| vec![v.to_string()])
151 |     } else {
152 |         scope.clone()
153 |     };
154 | 
155 |     tracing::info!("Try load snippets from: {path:?} for scope: {scope:?}");
156 | 
157 |     let content = std::fs::read_to_string(path)?;
158 | 
159 |     let result = match path.extension().and_then(|v| v.to_str()) {
160 |         Some("toml") => toml::from_str::<SnippetsConfig>(&content)
161 |             .map(|sc| sc.snippets)
162 |             .map_err(|e| anyhow::anyhow!(e)),
163 |         Some("json") => serde_json::from_str::<VSSnippetsConfig>(&content)
164 |             .map(|s| {
165 |                 s.snippets
166 |                     .into_iter()
167 |                     .map(|(prefix, snippet)| {
168 |                         if snippet.prefix.is_some() {
169 |                             return snippet;
170 |                         }
171 |                         snippet.prefix(prefix)
172 |                     })
173 |                     .flat_map(Into::<Vec<Snippet>>::into)
174 |                     .collect()
175 |             })
176 |             .map_err(|e| anyhow::anyhow!(e)),
177 |         _ => {
178 |             anyhow::bail!("Unsupported snipptes format: {path:?}")
179 |         }
180 |     };
181 | 
182 |     let snippets = result?;
183 | 
184 |     if let Some(scope) = scope {
185 |         // add global scope to each snippet
186 |         Ok(snippets
187 |             .into_iter()
188 |             .map(|mut s| {
189 |                 s.scope = Some(if let Some(mut v) = s.scope {
190 |                     // TODO unique scope items
191 |                     v.extend(scope.clone());
192 |                     v
193 |                 } else {
194 |                     scope.clone()
195 |                 });
196 |                 s
197 |             })
198 |             .collect())
199 |     } else {
200 |         Ok(snippets)
201 |     }
202 | }
203 | 
204 | pub fn load_snippets_from_path(
205 |     snippets_path: &std::path::PathBuf,
206 |     scope: &Option<Vec<String>>,
207 | ) -> Result<Vec<Snippet>> {
208 |     if snippets_path.is_file() {
209 |         return load_snippets_from_file(snippets_path, scope);
210 |     }
211 | 
212 |     let mut snippets = Vec::new();
213 |     match std::fs::read_dir(snippets_path) {
214 |         Ok(entries) => {
215 |             for entry in entries {
216 |                 let Ok(entry) = entry else { continue };
217 | 
218 |                 let path = entry.path();
219 |                 if path.is_dir() {
220 |                     continue;
221 |                 };
222 | 
223 |                 match load_snippets_from_file(&path, scope) {
224 |                     Ok(r) => snippets.extend(r),
225 |                     Err(e) => {
226 |                         tracing::error!("On read snippets from {path:?}: {e}");
227 |                         continue;
228 |                     }
229 |                 }
230 |             }
231 |         }
232 |         Err(e) => tracing::error!("On read dir {snippets_path:?}: {e}"),
233 |     }
234 | 
235 |     Ok(snippets)
236 | }
237 | 
238 | pub fn load_unicode_input_from_file(path: &std::path::PathBuf) -> Result<Vec<(String, String)>> {
239 |     tracing::info!("Try load 'unicode input' config from: {path:?}");
240 | 
241 |     let content = std::fs::read_to_string(path)?;
242 | 
243 |     let result = match path.extension().and_then(|v| v.to_str()) {
244 |         Some("toml") => toml::from_str::<HashMap<String, String>>(&content)
245 |             .map(|sc| sc.into_iter().collect())?,
246 |         _ => {
247 |             anyhow::bail!("Unsupported unicode format: {path:?}")
248 |         }
249 |     };
250 | 
251 |     Ok(result)
252 | }
253 | 
254 | pub fn load_unicode_input_from_path(
255 |     filepath: &std::path::PathBuf,
256 | ) -> Result<Vec<UnicodeInputItem>> {
257 |     let result = if filepath.is_file() {
258 |         load_unicode_input_from_file(filepath)?
259 |     } else {
260 |         let mut result = Vec::new();
261 |         match std::fs::read_dir(filepath) {
262 |             Ok(entries) => {
263 |                 for entry in entries {
264 |                     let Ok(entry) = entry else { continue };
265 | 
266 |                     let path = entry.path();
267 |                     if path.is_dir() {
268 |                         continue;
269 |                     };
270 | 
271 |                     match load_unicode_input_from_file(&path) {
272 |                         Ok(r) => result.extend(r),
273 |                         Err(e) => {
274 |                             tracing::error!("On read 'unicode input' config from {path:?}: {e}");
275 |                             continue;
276 |                         }
277 |                     }
278 |                 }
279 |             }
280 |             Err(e) => tracing::error!("On read dir {filepath:?}: {e}"),
281 |         }
282 |         result
283 |     };
284 | 
285 |     // sort items from largest to smallest by prefix
286 |     let mut items = result.into_iter().collect::<Vec<_>>();
287 |     items.sort_unstable_by(|(a, _), (b, _)| (a.len(), a).cmp(&(b.len(), b)));
288 |     items.reverse();
289 | 
290 |     Ok(items
291 |         .into_iter()
292 |         .map(|(prefix, body)| UnicodeInputItem { prefix, body })
293 |         .collect())
294 | }
295 | 


--------------------------------------------------------------------------------
/src/snippets/external.rs:
--------------------------------------------------------------------------------
 1 | use anyhow::Result;
 2 | use serde::Deserialize;
 3 | use std::str::FromStr;
 4 | 
 5 | #[derive(Debug, Deserialize)]
 6 | pub struct ExternalSnippets {
 7 |     pub sources: Vec<SnippetSource>,
 8 | }
 9 | 
10 | #[derive(Debug, Deserialize)]
11 | pub struct SnippetSource {
12 |     pub name: Option<String>,
13 |     pub git: String,
14 |     #[serde(default)]
15 |     pub paths: Vec<SourcePath>,
16 | }
17 | 
18 | #[derive(Debug, Deserialize)]
19 | pub struct SourcePath {
20 |     pub scope: Option<Vec<String>>,
21 |     pub path: String,
22 | }
23 | 
24 | impl SnippetSource {
25 |     pub fn destination_path(&self) -> Result<std::path::PathBuf> {
26 |         // TODO may be use Url crate?
27 |         // normalize url
28 |         let url = self
29 |             .git
30 |             .split('?')
31 |             .nth(0)
32 |             .ok_or_else(|| anyhow::anyhow!("Failed to parse {}", self.git))?;
33 |         let source = url
34 |             .split("://")
35 |             .nth(1)
36 |             .ok_or_else(|| anyhow::anyhow!("Failed to parse {}", self.git))?;
37 | 
38 |         Ok(std::path::PathBuf::from_str(source)?)
39 |     }
40 | }
41 | 


--------------------------------------------------------------------------------
/src/snippets/mod.rs:
--------------------------------------------------------------------------------
1 | pub mod config;
2 | pub mod external;
3 | pub mod vscode;
4 | 
5 | pub use config::{Snippet, SnippetsConfig, UnicodeInputItem};
6 | 


--------------------------------------------------------------------------------
/src/snippets/vscode.rs:
--------------------------------------------------------------------------------
 1 | use crate::Snippet;
 2 | use serde::Deserialize;
 3 | use std::collections::HashMap;
 4 | 
 5 | #[derive(Deserialize)]
 6 | pub struct VSSnippetsConfig {
 7 |     #[serde(flatten)]
 8 |     pub snippets: HashMap<String, VSCodeSnippet>,
 9 | }
10 | 
11 | #[derive(Deserialize)]
12 | #[serde(untagged)]
13 | pub enum VSCodeSnippetValue {
14 |     Single(String),
15 |     List(Vec<String>),
16 | }
17 | 
18 | #[derive(Deserialize)]
19 | pub struct VSCodeSnippet {
20 |     pub scope: Option<String>,
21 |     pub prefix: Option<VSCodeSnippetValue>,
22 |     pub body: VSCodeSnippetValue,
23 |     pub description: Option<VSCodeSnippetValue>,
24 | }
25 | 
26 | impl VSCodeSnippet {
27 |     pub fn prefix(self, prefix: String) -> Self {
28 |         Self {
29 |             prefix: Some(VSCodeSnippetValue::Single(prefix)),
30 |             ..self
31 |         }
32 |     }
33 | }
34 | 
35 | impl std::fmt::Display for VSCodeSnippetValue {
36 |     fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
37 |         write!(
38 |             f,
39 |             "{}",
40 |             match self {
41 |                 VSCodeSnippetValue::Single(v) => v.to_owned(),
42 |                 VSCodeSnippetValue::List(v) => v.join("\n"),
43 |             }
44 |         )
45 |     }
46 | }
47 | 
48 | impl From<VSCodeSnippet> for Vec<Snippet> {
49 |     fn from(value: VSCodeSnippet) -> Vec<Snippet> {
50 |         let scope = value
51 |             .scope
52 |             .map(|v| v.split(',').map(String::from).collect());
53 |         let body = value.body.to_string();
54 |         let description = value.description.map(|v| v.to_string());
55 | 
56 |         match value.prefix {
57 |             Some(VSCodeSnippetValue::Single(prefix)) => {
58 |                 vec![Snippet {
59 |                     scope,
60 |                     prefix,
61 |                     body,
62 |                     description,
63 |                 }]
64 |             }
65 |             Some(VSCodeSnippetValue::List(prefixes)) => prefixes
66 |                 .into_iter()
67 |                 .map(|prefix| Snippet {
68 |                     scope: scope.clone(),
69 |                     prefix,
70 |                     body: body.clone(),
71 |                     description: description.clone(),
72 |                 })
73 |                 .collect(),
74 |             None => Vec::new(),
75 |         }
76 |     }
77 | }
78 | 


--------------------------------------------------------------------------------
/tests/basic.rs:
--------------------------------------------------------------------------------
  1 | use simple_completion_language_server::{ac_searcher, search, server, snippets, RopeReader};
  2 | use std::io::Read;
  3 | 
  4 | use std::pin::Pin;
  5 | use std::str::FromStr;
  6 | use std::task::{Context, Poll};
  7 | use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
  8 | use tokio::sync::mpsc::{self, UnboundedReceiver, UnboundedSender};
  9 | use tower_lsp::{jsonrpc, lsp_types};
 10 | 
 11 | pub struct AsyncIn(UnboundedReceiver<String>);
 12 | pub struct AsyncOut(UnboundedSender<String>);
 13 | 
 14 | fn encode_message(content_type: Option<&str>, message: &str) -> String {
 15 |     let content_type = content_type
 16 |         .map(|ty| format!("\r\nContent-Type: {ty}"))
 17 |         .unwrap_or_default();
 18 | 
 19 |     format!(
 20 |         "Content-Length: {}{}\r\n\r\n{}",
 21 |         message.len(),
 22 |         content_type,
 23 |         message
 24 |     )
 25 | }
 26 | 
 27 | impl AsyncRead for AsyncIn {
 28 |     fn poll_read(
 29 |         self: Pin<&mut Self>,
 30 |         cx: &mut Context<'_>,
 31 |         buf: &mut ReadBuf<'_>,
 32 |     ) -> Poll<std::io::Result<()>> {
 33 |         let rx = self.get_mut();
 34 |         match rx.0.poll_recv(cx) {
 35 |             Poll::Ready(Some(v)) => {
 36 |                 tracing::debug!("read value: {:?}", v);
 37 |                 buf.put_slice(v.as_bytes());
 38 |                 Poll::Ready(Ok(()))
 39 |             }
 40 |             _ => Poll::Pending,
 41 |         }
 42 |     }
 43 | }
 44 | 
 45 | impl AsyncWrite for AsyncOut {
 46 |     fn poll_write(
 47 |         self: Pin<&mut Self>,
 48 |         _cx: &mut Context<'_>,
 49 |         buf: &[u8],
 50 |     ) -> Poll<std::io::Result<usize>> {
 51 |         let tx = self.get_mut();
 52 |         let value = String::from_utf8(buf.to_vec()).unwrap();
 53 |         tracing::debug!("write value: {value:?}");
 54 |         let _ = tx.0.send(value);
 55 |         Poll::Ready(Ok(buf.len()))
 56 |     }
 57 | 
 58 |     fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<std::io::Result<()>> {
 59 |         Poll::Ready(Ok(()))
 60 |     }
 61 | 
 62 |     fn poll_shutdown(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<std::io::Result<()>> {
 63 |         Poll::Ready(Ok(()))
 64 |     }
 65 | }
 66 | 
 67 | struct TestContext {
 68 |     pub request_tx: UnboundedSender<String>,
 69 |     pub response_rx: UnboundedReceiver<String>,
 70 |     pub _server: tokio::task::JoinHandle<()>,
 71 |     pub _client: tokio::task::JoinHandle<()>,
 72 | }
 73 | 
 74 | impl Default for TestContext {
 75 |     fn default() -> Self {
 76 |         TestContext::new(Default::default(), Default::default(), Default::default())
 77 |     }
 78 | }
 79 | 
 80 | impl TestContext {
 81 |     pub fn new(
 82 |         snippets: Vec<snippets::Snippet>,
 83 |         unicode_input: Vec<snippets::UnicodeInputItem>,
 84 |         home_dir: String,
 85 |     ) -> Self {
 86 |         let (request_tx, rx) = mpsc::unbounded_channel::<String>();
 87 |         let (tx, mut client_response_rx) = mpsc::unbounded_channel::<String>();
 88 |         let (client_tx, response_rx) = mpsc::unbounded_channel::<String>();
 89 | 
 90 |         let async_in = AsyncIn(rx);
 91 |         let async_out = AsyncOut(tx);
 92 | 
 93 |         let server = tokio::spawn(async move {
 94 |             server::start(async_in, async_out, snippets, unicode_input, home_dir).await
 95 |         });
 96 | 
 97 |         let client = tokio::spawn(async move {
 98 |             loop {
 99 |                 let Some(response) = client_response_rx.recv().await else {
100 |                     continue;
101 |                 };
102 |                 if client_tx.send(response).is_err() {
103 |                     tracing::error!("Failed to pass client response");
104 |                 }
105 |             }
106 |         });
107 | 
108 |         Self {
109 |             request_tx,
110 |             response_rx,
111 |             _server: server,
112 |             _client: client,
113 |         }
114 |     }
115 | 
116 |     pub async fn send_all(&mut self, messages: &[&str]) -> anyhow::Result<()> {
117 |         for message in messages {
118 |             self.send(&jsonrpc::Request::from_str(message)?).await?;
119 |         }
120 |         Ok(())
121 |     }
122 | 
123 |     pub async fn send(&mut self, request: &jsonrpc::Request) -> anyhow::Result<()> {
124 |         self.request_tx
125 |             .send(encode_message(None, &serde_json::to_string(request)?))?;
126 |         Ok(())
127 |     }
128 | 
129 |     pub async fn recv<R: std::fmt::Debug + serde::de::DeserializeOwned>(
130 |         &mut self,
131 |     ) -> anyhow::Result<R> {
132 |         // TODO split response for single messages
133 |         loop {
134 |             let response = self
135 |                 .response_rx
136 |                 .recv()
137 |                 .await
138 |                 .ok_or_else(|| anyhow::anyhow!("empty response"))?;
139 |             // decode response
140 |             let payload = response.split('\n').next_back().unwrap_or_default();
141 | 
142 |             // skip log messages
143 |             if payload.contains("window/logMessage") {
144 |                 tracing::debug!("log: {payload}");
145 |                 continue;
146 |             }
147 |             let response = serde_json::from_str::<jsonrpc::Response>(payload)?;
148 |             let (_id, result) = response.into_parts();
149 |             return Ok(serde_json::from_value(result?)?);
150 |         }
151 |     }
152 | 
153 |     pub async fn request<R: std::fmt::Debug + serde::de::DeserializeOwned>(
154 |         &mut self,
155 |         request: &jsonrpc::Request,
156 |     ) -> anyhow::Result<R> {
157 |         self.send(request).await?;
158 |         self.recv().await
159 |     }
160 | 
161 |     pub async fn initialize(&mut self) -> anyhow::Result<()> {
162 |         let request = jsonrpc::Request::build("initialize")
163 |             .id(1)
164 |             .params(serde_json::json!({"capabilities":{}}))
165 |             .finish();
166 | 
167 |         let _ = self
168 |             .request::<lsp_types::InitializeResult>(&request)
169 |             .await?;
170 | 
171 |         Ok(())
172 |     }
173 | }
174 | 
175 | #[test_log::test]
176 | fn chunks_by_words() -> anyhow::Result<()> {
177 |     let rope = ropey::Rope::from_iter((0..1000).map(|_| "word ".to_string()));
178 | 
179 |     let mut reader = RopeReader::new(&rope);
180 | 
181 |     let mut buf = vec![0; 1000 * 5];
182 | 
183 |     let mut whole_text = String::new();
184 | 
185 |     loop {
186 |         let n = reader.read(&mut buf)?;
187 | 
188 |         if n == 0 {
189 |             break;
190 |         }
191 | 
192 |         let text = std::str::from_utf8(&buf[..n])?;
193 | 
194 |         whole_text.push_str(text);
195 | 
196 |         let text = text.trim();
197 |         if text.is_empty() {
198 |             continue;
199 |         }
200 | 
201 |         let last_word = text.split(" ").last().unwrap();
202 | 
203 |         assert_eq!(last_word, "word");
204 |     }
205 |     let words = whole_text.trim().split(" ");
206 |     assert_eq!(words.clone().count(), 1000);
207 | 
208 |     Ok(())
209 | }
210 | 
211 | #[test_log::test]
212 | fn words_search() -> anyhow::Result<()> {
213 |     let text = r#"Word 求 btask_timeout HANDLERS["loggers"]"#;
214 |     let doc = ropey::Rope::from_str(text);
215 |     let mut words = std::collections::HashSet::new();
216 | 
217 |     let prefix = "BTA";
218 |     search(prefix, &doc, &ac_searcher(prefix)?, 10, &mut words)?;
219 |     assert_eq!(
220 |         words.iter().next().map(|v| v.as_str()),
221 |         Some("btask_timeout")
222 |     );
223 | 
224 |     words.clear();
225 | 
226 |     let prefix = "logge";
227 |     search(prefix, &doc, &ac_searcher(prefix)?, 10, &mut words)?;
228 |     assert_eq!(words.iter().next().map(|v| v.as_str()), Some("loggers"));
229 | 
230 |     Ok(())
231 | }
232 | 
233 | #[test_log::test(tokio::test)]
234 | async fn initialize() -> anyhow::Result<()> {
235 |     let mut context = TestContext::default();
236 | 
237 |     let request = jsonrpc::Request::build("initialize")
238 |         .id(1)
239 |         .params(serde_json::json!({"capabilities":{}}))
240 |         .finish();
241 | 
242 |     let response = context
243 |         .request::<lsp_types::InitializeResult>(&request)
244 |         .await?;
245 | 
246 |     assert_eq!(
247 |         response.capabilities.completion_provider,
248 |         Some(lsp_types::CompletionOptions {
249 |             resolve_provider: Some(false),
250 |             trigger_characters: Some(vec![std::path::MAIN_SEPARATOR_STR.to_string()]),
251 |             ..lsp_types::CompletionOptions::default()
252 |         })
253 |     );
254 |     assert_eq!(
255 |         response.capabilities.text_document_sync,
256 |         Some(lsp_types::TextDocumentSyncCapability::Kind(
257 |             lsp_types::TextDocumentSyncKind::INCREMENTAL,
258 |         ))
259 |     );
260 | 
261 |     Ok(())
262 | }
263 | 
264 | #[test_log::test(tokio::test)]
265 | async fn completion() -> anyhow::Result<()> {
266 |     let mut context = TestContext::default();
267 |     context.initialize().await?;
268 |     context.send_all(&[
269 |         r#"{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"languageId":"python","text":"hello\nhe","uri":"file:///tmp/main.py","version":0}}}"#,
270 |         r#"{"jsonrpc":"2.0","method":"textDocument/completion","params":{"position":{"character":2,"line":1},"textDocument":{"uri":"file:///tmp/main.py"}},"id":3}"#
271 |     ]).await?;
272 | 
273 |     let response = context.recv::<lsp_types::CompletionResponse>().await?;
274 | 
275 |     let lsp_types::CompletionResponse::Array(items) = response else {
276 |         anyhow::bail!("completion array expected")
277 |     };
278 | 
279 |     assert_eq!(items.len(), 1);
280 |     assert_eq!(
281 |         items.into_iter().map(|i| i.label).collect::<Vec<_>>(),
282 |         vec!["hello"]
283 |     );
284 | 
285 |     context.send_all(&[
286 |         r#"{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"languageId":"python","text":"hello\nel","uri":"file:///tmp/main2.py","version":0}}}"#,
287 |         r#"{"jsonrpc":"2.0","method":"textDocument/completion","params":{"position":{"character":2,"line":1},"textDocument":{"uri":"file:///tmp/main2.py"}},"id":3}"#
288 |     ]).await?;
289 | 
290 |     let response = context.recv::<lsp_types::CompletionResponse>().await?;
291 | 
292 |     let lsp_types::CompletionResponse::Array(items) = response else {
293 |         anyhow::bail!("completion array expected")
294 |     };
295 | 
296 |     assert_eq!(items.len(), 0);
297 | 
298 |     Ok(())
299 | }
300 | 
301 | #[test_log::test(tokio::test)]
302 | async fn completion_by_quoted_word() -> anyhow::Result<()> {
303 |     let mut context = TestContext::default();
304 |     context.initialize().await?;
305 |     context.send_all(&[
306 |         r#"{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"languageId":"python","text":"function(\"hello\")\nhe","uri":"file:///tmp/main.py","version":0}}}"#,
307 |         r#"{"jsonrpc":"2.0","method":"textDocument/completion","params":{"position":{"character":2,"line":1},"textDocument":{"uri":"file:///tmp/main.py"}},"id":3}"#
308 |     ]).await?;
309 | 
310 |     let response = context.recv::<lsp_types::CompletionResponse>().await?;
311 | 
312 |     let lsp_types::CompletionResponse::Array(items) = response else {
313 |         anyhow::bail!("completion array expected")
314 |     };
315 | 
316 |     assert_eq!(items.len(), 1);
317 |     assert_eq!(
318 |         items.into_iter().map(|i| i.label).collect::<Vec<_>>(),
319 |         vec!["hello"]
320 |     );
321 | 
322 |     Ok(())
323 | }
324 | 
325 | #[test_log::test(tokio::test)]
326 | async fn snippets() -> anyhow::Result<()> {
327 |     let mut context = TestContext::new(
328 |         vec![
329 |             snippets::Snippet {
330 |                 scope: Some(vec!["python".to_string()]),
331 |                 prefix: "ma".to_string(),
332 |                 body: "def main(): pass".to_string(),
333 |                 description: None,
334 |             },
335 |             snippets::Snippet {
336 |                 scope: Some(vec!["c".to_string()]),
337 |                 prefix: "ma".to_string(),
338 |                 body: "malloc".to_string(),
339 |                 description: None,
340 |             },
341 |         ],
342 |         Default::default(),
343 |         Default::default(),
344 |     );
345 |     context.initialize().await?;
346 |     context.send_all(&[
347 |         r#"{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"languageId":"python","text":"ma","uri":"file:///tmp/main.py","version":0}}}"#,
348 |         r#"{"jsonrpc":"2.0","method":"textDocument/completion","params":{"position":{"character":2,"line":0},"textDocument":{"uri":"file:///tmp/main.py"}},"id":3}"#
349 |     ]).await?;
350 | 
351 |     let response = context.recv::<lsp_types::CompletionResponse>().await?;
352 | 
353 |     let lsp_types::CompletionResponse::Array(items) = response else {
354 |         anyhow::bail!("completion array expected")
355 |     };
356 | 
357 |     assert_eq!(items.len(), 1);
358 |     assert_eq!(
359 |         items
360 |             .into_iter()
361 |             .filter_map(|i| i.text_edit.and_then(|l| match l {
362 |                 lsp_types::CompletionTextEdit::InsertAndReplace(t) => Some(t.new_text),
363 |                 _ => None,
364 |             }))
365 |             .collect::<Vec<_>>(),
366 |         vec!["def main(): pass"]
367 |     );
368 | 
369 |     Ok(())
370 | }
371 | 
372 | #[test_log::test(tokio::test)]
373 | async fn snippets_inline_by_word_tail() -> anyhow::Result<()> {
374 |     let mut context = TestContext::new(
375 |         vec![snippets::Snippet {
376 |             scope: Some(vec!["python".to_string()]),
377 |             prefix: "sq".to_string(),
378 |             body: "^2".to_string(),
379 |             description: None,
380 |         }],
381 |         Default::default(),
382 |         Default::default(),
383 |     );
384 |     context.initialize().await?;
385 | 
386 |     let request = jsonrpc::Request::from_str(&serde_json::to_string(&serde_json::json!(
387 |         {
388 |             "jsonrpc": "2.0",
389 |             "method": "workspace/didChangeConfiguration",
390 |             "params": {
391 |                 "settings": {
392 |                     "snippets_inline_by_word_tail": true,
393 |                     "feature_snippets": true,
394 |                     "feature_citations": false,
395 |                     "feature_words": false,
396 |                     "feature_unicode_input": false,
397 |                     "feature_paths": false,
398 |                 }
399 |             }
400 |         }
401 |     ))?)?;
402 |     context.send(&request).await?;
403 | 
404 |     context.send_all(&[
405 |         r#"{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"languageId":"python","text":"xsq","uri":"file:///tmp/main.py","version":0}}}"#,
406 |         r#"{"jsonrpc":"2.0","method":"textDocument/completion","params":{"position":{"character":3,"line":0},"textDocument":{"uri":"file:///tmp/main.py"}},"id":3}"#
407 |     ]).await?;
408 | 
409 |     let response = context.recv::<lsp_types::CompletionResponse>().await?;
410 | 
411 |     let lsp_types::CompletionResponse::Array(items) = response else {
412 |         anyhow::bail!("completion array expected")
413 |     };
414 | 
415 |     assert_eq!(items.len(), 1);
416 |     assert_eq!(
417 |         items
418 |             .into_iter()
419 |             .filter_map(|i| i.text_edit.and_then(|l| match l {
420 |                 lsp_types::CompletionTextEdit::InsertAndReplace(t) => Some(t.new_text),
421 |                 _ => None,
422 |             }))
423 |             .collect::<Vec<_>>(),
424 |         vec!["^2"]
425 |     );
426 | 
427 |     Ok(())
428 | }
429 | 
430 | #[test_log::test(tokio::test)]
431 | async fn unicode_input() -> anyhow::Result<()> {
432 |     let mut context = TestContext::new(
433 |         Default::default(),
434 |         vec![
435 |             snippets::UnicodeInputItem {
436 |                 prefix: "alpha".to_string(),
437 |                 body: "α".to_string(),
438 |             },
439 |             snippets::UnicodeInputItem {
440 |                 prefix: "betta".to_string(),
441 |                 body: "β".to_string(),
442 |             },
443 |         ],
444 |         Default::default(),
445 |     );
446 |     context.initialize().await?;
447 | 
448 |     let request = jsonrpc::Request::from_str(&serde_json::to_string(&serde_json::json!(
449 |         {
450 |             "jsonrpc": "2.0",
451 |             "method": "workspace/didChangeConfiguration",
452 |             "params": {
453 |                 "settings": {
454 |                     "snippets_inline_by_word_tail": false,
455 |                     "feature_snippets": false,
456 |                     "feature_citations": false,
457 |                     "feature_words": false,
458 |                     "feature_unicode_input": true,
459 |                     "feature_paths": false,
460 |                 }
461 |             }
462 |         }
463 |     ))?)?;
464 |     context.send(&request).await?;
465 | 
466 |     context.send_all(&[
467 |         r#"{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"languageId":"python","text":"α+bet","uri":"file:///tmp/main.py","version":0}}}"#,
468 |         r#"{"jsonrpc":"2.0","method":"textDocument/completion","params":{"position":{"character":5,"line":0},"textDocument":{"uri":"file:///tmp/main.py"}},"id":3}"#
469 |     ]).await?;
470 | 
471 |     let response = context.recv::<lsp_types::CompletionResponse>().await?;
472 | 
473 |     let lsp_types::CompletionResponse::Array(items) = response else {
474 |         anyhow::bail!("completion array expected")
475 |     };
476 | 
477 |     assert_eq!(
478 |         items
479 |             .into_iter()
480 |             .filter_map(|i| match i.text_edit {
481 |                 Some(lsp_types::CompletionTextEdit::InsertAndReplace(te)) => Some(te.new_text),
482 |                 _ => None,
483 |             })
484 |             .collect::<Vec<_>>(),
485 |         vec!["β"]
486 |     );
487 | 
488 |     Ok(())
489 | }
490 | 
491 | #[test_log::test(tokio::test)]
492 | async fn paths() -> anyhow::Result<()> {
493 |     std::fs::create_dir_all("/tmp/scls-test/sub-folder")?;
494 | 
495 |     let mut context = TestContext::new(Default::default(), Default::default(), "/tmp".to_string());
496 |     context.initialize().await?;
497 | 
498 |     let request = jsonrpc::Request::from_str(&serde_json::to_string(&serde_json::json!(
499 |         {
500 |             "jsonrpc": "2.0",
501 |             "method": "workspace/didChangeConfiguration",
502 |             "params": {
503 |                 "settings": {
504 |                     "snippets_inline_by_word_tail": false,
505 |                     "feature_snippets": false,
506 |                     "feature_citations": false,
507 |                     "feature_words": false,
508 |                     "feature_unicode_input": false,
509 |                     "feature_paths": true,
510 |                 }
511 |             }
512 |         }
513 |     ))?)?;
514 |     context.send(&request).await?;
515 | 
516 |     context.send_all(&[
517 |         r#"{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"languageId":"python","text":"/tmp/scls-test/","uri":"file:///tmp/main.py","version":0}}}"#,
518 |         r#"{"jsonrpc":"2.0","method":"textDocument/completion","params":{"position":{"character":15,"line":0},"textDocument":{"uri":"file:///tmp/main.py"}},"id":3}"#
519 |     ]).await?;
520 | 
521 |     let response = context.recv::<lsp_types::CompletionResponse>().await?;
522 | 
523 |     let lsp_types::CompletionResponse::Array(items) = response else {
524 |         anyhow::bail!("completion array expected")
525 |     };
526 | 
527 |     assert_eq!(
528 |         items
529 |             .into_iter()
530 |             .filter_map(|i| match i.text_edit {
531 |                 Some(lsp_types::CompletionTextEdit::InsertAndReplace(te)) => Some(te.new_text),
532 |                 _ => None,
533 |             })
534 |             .collect::<Vec<_>>(),
535 |         vec!["/tmp/scls-test/sub-folder"]
536 |     );
537 | 
538 |     context.send_all(&[
539 |         r#"{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"languageId":"python","text":"/tmp/scls-test/su","uri":"file:///tmp/main2.py","version":0}}}"#,
540 |         r#"{"jsonrpc":"2.0","method":"textDocument/completion","params":{"position":{"character":17,"line":0},"textDocument":{"uri":"file:///tmp/main2.py"}},"id":3}"#
541 |     ]).await?;
542 | 
543 |     let response = context.recv::<lsp_types::CompletionResponse>().await?;
544 | 
545 |     let lsp_types::CompletionResponse::Array(items) = response else {
546 |         anyhow::bail!("completion array expected")
547 |     };
548 | 
549 |     assert_eq!(
550 |         items
551 |             .into_iter()
552 |             .filter_map(|i| match i.text_edit {
553 |                 Some(lsp_types::CompletionTextEdit::InsertAndReplace(te)) => Some(te.new_text),
554 |                 _ => None,
555 |             })
556 |             .collect::<Vec<_>>(),
557 |         vec!["/tmp/scls-test/sub-folder"]
558 |     );
559 | 
560 |     context.send_all(&[
561 |         r#"{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"languageId":"python","text":"~/scls-test/su","uri":"file:///tmp/main3.py","version":0}}}"#,
562 |         r#"{"jsonrpc":"2.0","method":"textDocument/completion","params":{"position":{"character":14,"line":0},"textDocument":{"uri":"file:///tmp/main3.py"}},"id":3}"#
563 |     ]).await?;
564 | 
565 |     let response = context.recv::<lsp_types::CompletionResponse>().await?;
566 | 
567 |     let lsp_types::CompletionResponse::Array(items) = response else {
568 |         anyhow::bail!("completion array expected")
569 |     };
570 | 
571 |     assert_eq!(
572 |         items
573 |             .into_iter()
574 |             .filter_map(|i| match i.text_edit {
575 |                 Some(lsp_types::CompletionTextEdit::InsertAndReplace(te)) => Some(te.new_text),
576 |                 _ => None,
577 |             })
578 |             .collect::<Vec<_>>(),
579 |         vec!["~/scls-test/sub-folder"]
580 |     );
581 | 
582 |     context.send_all(&[
583 |         r#"{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"languageId":"python","text":"./scls-test/su","uri":"file:///tmp/main4.py","version":0}}}"#,
584 |         r#"{"jsonrpc":"2.0","method":"textDocument/completion","params":{"position":{"character":14,"line":0},"textDocument":{"uri":"file:///tmp/main4.py"}},"id":3}"#
585 |     ]).await?;
586 | 
587 |     let response = context.recv::<lsp_types::CompletionResponse>().await?;
588 | 
589 |     let lsp_types::CompletionResponse::Array(items) = response else {
590 |         anyhow::bail!("completion array expected")
591 |     };
592 | 
593 |     assert_eq!(
594 |         items
595 |             .into_iter()
596 |             .filter_map(|i| match i.text_edit {
597 |                 Some(lsp_types::CompletionTextEdit::InsertAndReplace(te)) => Some(te.new_text),
598 |                 _ => None,
599 |             })
600 |             .collect::<Vec<_>>(),
601 |         vec!["./scls-test/sub-folder"]
602 |     );
603 | 
604 |     context.send_all(&[
605 |         r#"{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"languageId":"python","text":"../scls-test/su","uri":"file:///tmp/scls-test/main5.py","version":0}}}"#,
606 |         r#"{"jsonrpc":"2.0","method":"textDocument/completion","params":{"position":{"character":15,"line":0},"textDocument":{"uri":"file:///tmp/scls-test/main5.py"}},"id":3}"#
607 |     ]).await?;
608 | 
609 |     let response = context.recv::<lsp_types::CompletionResponse>().await?;
610 | 
611 |     let lsp_types::CompletionResponse::Array(items) = response else {
612 |         anyhow::bail!("completion array expected")
613 |     };
614 | 
615 |     assert_eq!(
616 |         items
617 |             .into_iter()
618 |             .filter_map(|i| match i.text_edit {
619 |                 Some(lsp_types::CompletionTextEdit::InsertAndReplace(te)) => Some(te.new_text),
620 |                 _ => None,
621 |             })
622 |             .collect::<Vec<_>>(),
623 |         vec!["../scls-test/sub-folder"]
624 |     );
625 | 
626 |     Ok(())
627 | }
628 | 
629 | #[test_log::test(tokio::test)]
630 | #[cfg(feature = "citation")]
631 | async fn citations() -> anyhow::Result<()> {
632 |     std::fs::create_dir_all("/tmp/scls-test-citation")?;
633 | 
634 |     let doc = r#"
635 | ---
636 | bibliography: "/tmp/scls-test-citation/test.bib" # could also be surrounded by brackets instead of quotation marks
637 | ---
638 | 
639 | # Heading      
640 | @b
641 | "#;
642 | 
643 |     let bib = r#"
644 | @online{irfanullah_open_acces_global_south_2021,
645 | 	author = {Irfanullah, Haseeb},
646 | 	title = {{Open Access and Global South}},
647 | 	subtitle = {It is More Than a Matter of Inclusion},
648 | 	date = {2021-02-08},
649 | 	urldate = {2024-08-04},
650 | 	language = {english},
651 | 	url = {https://web.archive.org/web/20240303223926/https://scholarlykitchen.sspnet.org/2021/01/28/open-access-and-global-south-it-is-more-than-a-matter-of-inclusion/},
652 | }
653 | 
654 | @article{brainard_pay-to-publ_model_open_acces_2024,
655 | 	author = {Brainard, Jeffrey},
656 | 	title = {{Is the pay-to-publish model for open access pricing scientists
657 | 	         out?}},
658 | 	journal = {American Association for the Advancement of Science},
659 | 	volume = {385},
660 | 	issue = {6708},
661 | 	date = {2024-08-01},
662 | 	urldate = {2024-08-04},
663 | 	doi = {10.1126/science.zp80ua9},
664 | }
665 | 
666 | @article{brembs_replacing_academic_journals_2023,
667 | 	author = {Brembs, Björn and Huneman, Philippe and Schönbrodt, Felix and
668 | 	          Nilsonne, Gustav and Susi, Toma and Siems, Renke and Perakakis,
669 | 	          Pandelis and Trachana, Varvara and Ma, Lai and Rodriguez-Cuadrado,
670 | 	          Sara},
671 | 	title = {Replacing academic journals},
672 | 	year = {2023},
673 | 	month = may,
674 | 	doi = {10.5281/zenodo.7974116},
675 | } 
676 |     "#;
677 | 
678 |     std::fs::write("/tmp/scls-test-citation/test.bib", bib)?;
679 | 
680 |     let mut context = TestContext::default();
681 |     context.initialize().await?;
682 | 
683 |     let request = jsonrpc::Request::from_str(&serde_json::to_string(&serde_json::json!(
684 |         {
685 |             "jsonrpc": "2.0",
686 |             "method": "workspace/didChangeConfiguration",
687 |             "params": {
688 |                 "settings": {
689 |                     "feature_citations": true,
690 |                     "feature_words": false,
691 |                     "feature_snippets": false,
692 |                     "feature_unicode_input": false,
693 |                     "feature_paths": false,
694 |                 }
695 |             }
696 |         }
697 |     ))?)?;
698 |     context.send(&request).await?;
699 | 
700 |     context
701 |         .send_all(&[
702 |             &serde_json::to_string(&serde_json::json!(
703 |                 {
704 |                     "jsonrpc": "2.0",
705 |                     "method": "textDocument/didOpen",
706 |                     "params": {
707 |                         "textDocument": {
708 |                             "languageId": "markdown",
709 |                             "text": doc,
710 |                             "uri": "file:///tmp/doc.md",
711 |                             "version":0
712 |                         }
713 |                     }
714 |                 }
715 |             ))?,
716 |             &serde_json::to_string(&serde_json::json!(
717 |                 {
718 |                     "jsonrpc": "2.0",
719 |                     "id": 3,
720 |                     "method": "textDocument/completion",
721 |                     "params": {
722 |                         "position": {
723 |                             "character": 2,
724 |                             "line": doc.lines().count() - 1
725 |                         },
726 |                         "textDocument": {
727 |                             "uri": "file:///tmp/doc.md"
728 |                         }
729 |                     }
730 |                 }
731 |             ))?,
732 |         ])
733 |         .await?;
734 | 
735 |     let response = context.recv::<lsp_types::CompletionResponse>().await?;
736 | 
737 |     let lsp_types::CompletionResponse::Array(items) = response else {
738 |         anyhow::bail!("completion array expected")
739 |     };
740 | 
741 |     assert_eq!(items.len(), 2);
742 | 
743 |     assert_eq!(
744 |         items
745 |             .into_iter()
746 |             .filter_map(|i| match i.text_edit {
747 |                 Some(lsp_types::CompletionTextEdit::InsertAndReplace(te)) => Some(te.new_text),
748 |                 _ => None,
749 |             })
750 |             .collect::<Vec<_>>(),
751 |         vec![
752 |             "brainard_pay-to-publ_model_open_acces_2024",
753 |             "brembs_replacing_academic_journals_2023"
754 |         ]
755 |     );
756 |     Ok(())
757 | }
758 | 


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