├── .gitignore ├── COPYING ├── Cargo.toml ├── README.md ├── benches ├── example.html ├── full_example.html ├── my_benchmark.rs └── page_habrahabr-70330.html └── src ├── lib.rs └── tests.rs /.gitignore: -------------------------------------------------------------------------------- 1 | /target 2 | Cargo.lock 3 | -------------------------------------------------------------------------------- /COPYING: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | 676 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "rusthtml" 3 | version = "0.2.4" 4 | authors = ["void-life"] 5 | edition = "2018" 6 | description = "A html parser written in rust" 7 | repository = "https://github.com/moelife-coder/rusthtml" 8 | license = "GPL-3.0-only" 9 | keywords = ["html", "parser"] 10 | 11 | 12 | [dependencies] 13 | 14 | [dev-dependencies] 15 | criterion = "0.3" 16 | 17 | [[bench]] 18 | name = "my_benchmark" 19 | harness = false 20 | 21 | [profile.release] 22 | lto = true 23 | codegen-units = 1 24 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # RustHtml - a small html parser 2 | 3 | 4 | ## About The Project 5 | 6 | `RustHtml` is a small html parser written in rust. 7 | 8 | > Warning: this library is not production-ready. Many of the tags and standard are not implemented (mainly located in `tag_optimize()`). PRs are welcomed. 9 | 10 | Completed & planned features: 11 | 12 | - [x] Parse simple html 13 | - [x] Parse html with void elements 14 | - [x] Parse html with javascript 15 | - [ ] Parse html with complicated elements (such as html without `head` ending tag, etc) 16 | 17 | ## Benchmarking 18 | 19 | Run `cargo bench` to benchmark the program. 20 | 21 | On my local device, parsing a `43833` lines html requires `18.697 ms` to complete 22 | 23 | 24 | ## License 25 | 26 | Distributed under the GPL-3.0-Only License. See `LICENSE` for more information. 27 | -------------------------------------------------------------------------------- /benches/example.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | TEST HTML PAGE 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
13 | 19 |
20 |
21 |

Heading...

22 |

Heading...

23 |

Heading...

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Heading...

25 |
Heading...
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Heading...
27 |

28 | Lorem ipsum dolor sit amet, consectetur adipiscing elit. Phasellus nisi lacus, auctor sit amet purus vel, gravida luctus lectus. Aenean rhoncus dapibus enim, sit amet faucibus leo ornare vitae.
29 | span 30 | Bold word 31 | italic 32 | emphasis 33 | mark 34 | small 35 | sub 36 | sup 37 | Statements... 38 | NASA 39 | strikethrough 40 | deprecated info new info 41 | not relevant 42 | link 43 | 44 | ruby baseannotation 45 |
46 | CTRL+ALT+CANC 47 |

48 |
49 | 50 |

This is a short quote

51 |
This instead is a long quote that is going to use a lot of words and also cite who said that. —Some People
52 | 53 |
    54 |
  1. data tag
    2. 55 |
  2. data tag
    3. 56 |
  3. data tag
    4. 57 |
  4. List item
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    63 |
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70 | 71 |
72 | 73 | 76 | 77 | 84 | 85 | 86 | Please install the Shockwave plugin to watch this movie. 87 | 88 | 89 | 
 90 | 
 91 |                                        _,'/
 92 |                                   _.-''._:
 93 |                           ,-:`-.-'    .:.|
 94 |                          ;-.''       .::.|
 95 |           _..------.._  / (:.       .:::.|
 96 |        ,'.   .. . .  .`/  : :.     .::::.|
 97 |      ,'. .    .  .   ./    \ ::. .::::::.|
 98 |    ,'. .  .    .   . /      `.,,::::::::.;\
 99 |   /  .            . /       ,',';_::::::,:_:
100 |  / . .  .   .      /      ,',','::`--'':;._;
101 | : .             . /     ,',',':::::::_:'_,'
102 | |..  .   .   .   /    ,',','::::::_:'_,'
103 | |.              /,-. /,',':::::_:'_,'
104 | | ..    .    . /) /-:/,'::::_:',-'
105 | : . .     .   // / ,'):::_:',' ;
106 |  \ .   .     // /,' /,-.','  ./
107 |   \ . .  `::./,// ,'' ,'   . /
108 |    `. .   . `;;;,/_.'' . . ,'
109 |     ,`. .   :;;' `:.  .  ,'
110 |    /   `-._,'  ..  ` _.-'
111 |   (     _,'``------'' 
112 |    `--''
113 | 
114 |
115 | 116 | 117 | // code tag 118 | #include 119 | 120 | using namespace std; 121 | 122 | int main() 123 | { 124 | cout << "Hello World!" << endl; 125 | return 0; 126 | } 127 | 128 |

129 | variable = 1000; 130 | Traceback (most recent call last):
NameError: name 'variabl' is not defined 131 |

132 | 133 | 134 | 135 | 136 | 137 | 138 | 139 | 140 | 141 | 142 | 143 | 144 | 145 | 146 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 157 | 158 | 159 | 160 | 161 | 162 | 163 | 164 |
NumbersLettersColors
123ABCRGB
1ARed
2BGreen
3CBlue
165 | 166 |

A definition is an explanation of the meaning of a word or phrase.

167 | 168 |
169 | Summary of content below 170 |

Content 1

171 |

Content 2

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Content 3

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Content 4

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Content

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Informations about content.

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179 | 180 | 181 | 25 out of 45 182 | 183 |

2+2 = 4

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div > div > p

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This is a recording of a talk called Reclaim HTML5 which was orinally delieved in Vancouver at a Super VanJS Meetup. It is hosted by The Internet Archive and licensed under CC 3.0.

225 | 226 | 227 | 228 |
229 |
230 |

Title of Article

231 | by Arthur T. Writer 232 |
233 |

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam volutpat sollicitudin nisi, at convallis nunc semper et. Donec ultrices odio ac purus facilisis, at mollis urna finibus.

234 |
235 | placeholder-image 236 |
Caption.
237 |
238 |
Published
17 August 2020
Tags
Sample Posts, html example
239 |
240 | 241 |
242 |
243 | Personal Information 244 |
245 |
246 |
249 |
250 | 251 | 254 | Square Circle 255 | 256 | placeholder-image 257 | 258 |
259 | 260 | 261 | 262 | 268 | 269 |
270 | 271 | 275 | 276 | 277 | 278 | -------------------------------------------------------------------------------- /benches/full_example.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | HTML Patterns 9 | 10 | 11 | 12 | 13 | 14 | 24 | 25 | 26 | 27 | 28 |
29 |

HTML

30 |

Every html element in one place. Just waiting to be styled.

31 |
32 | 33 | 34 | 35 | 44 | 45 |
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Site title

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Headings & Copy

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First Header h1

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62 | At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis 63 | praesentium voluptatum deleniti atque corrupti quos. 64 |

65 |

Second header h2

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67 | Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod 68 | tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, 69 | quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo 70 | consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse 71 | cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat 72 | non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. 73 |

74 |

Third header h3

75 |

76 | At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis 77 | praesentium voluptatum deleniti atque corrupti quos dolores et quas 78 | molestias excepturi sint occaecati cupiditate non provident, similique sunt 79 | in culpa qui officia deserunt mollitia animi, id est laborum et dolorum 80 | fuga. Et harum quidem rerum facilis est et expedita distinctio. 81 |

82 |

Fourth header h4

83 |

84 | Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, 85 | consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt 86 | ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima 87 | veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi 88 | ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit 89 | qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum 90 | qui dolorem eum fugiat quo voluptas nulla pariatur?" 91 |

92 |
Fifth header h5
93 |

94 | Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium 95 | doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore 96 | veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim 97 | ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia 98 | consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. 99 |

100 |
Sixth header h6
101 |

102 | At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis 103 | praesentium voluptatum deleniti atque corrupti quos. 104 |

105 |
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Links

109 | Sample text link 110 | Sample button link 111 |
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Lists

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Unordered list

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  • Orange
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  • Apple
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Ordered list

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Definition list

134 |
135 |
136 | Kick 137 |
138 |
139 | 808 140 |
141 |
142 | Snare 143 |
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145 | 909 146 |
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Maine
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Augusta
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California
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Sacremento
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Oregon
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Salem
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New York
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Albany
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Ascender
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The part of certain lowercase letters that extends above the x-height of a font.
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Font
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Traditionally, a complete set of characters for one typeface at 163 | one particular type size. Often used more loosely as a synonym for 164 | "typeface". 165 |
166 |
Golden Section
167 |
168 | The ideal proportion according to the ancient Greeks. It is visualized as the 169 | division of a line into two unequal segments in such a way that the ratio of the 170 | smaller segment to the larger segment is equal to the ratio of the larger to the 171 | whole. It is usually defined as 21:34, that is, 21/34 and 34/(21+34) both equal 172 | approximately 0.618. A rectangle whose sides are of this proportion is called a 173 | "golden rectangle". Golden rectangles can be found in the proportions of the 174 | Parthenon and many medieval manuscripts. 175 |
176 |
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Forms

181 |
182 |
183 | 187 | Legend Example 188 | 189 |
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Helper text if necessary.

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Error messages when appropriate.

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Buttons

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An Example Article

265 |
266 |

Title

267 |

268 | Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod 269 | tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, 270 | quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo 271 | consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse 272 | cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat 273 | non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. 274 |

275 |
276 |

277 | This is a GREAT pull quote. 278 |

279 | - Author 280 |
281 |

282 | Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, 283 | consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt 284 | ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima 285 | veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi 286 | ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit 287 | qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum 288 | qui dolorem eum fugiat quo voluptas nulla pariatur?" 289 |

290 |

291 | At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis 292 | praesentium voluptatum deleniti atque corrupti quos dolores et quas 293 | molestias excepturi sint occaecati cupiditate non provident, similique sunt 294 | in culpa qui officia deserunt mollitia animi, id est laborum et dolorum 295 | fuga. Et harum quidem rerum facilis est et expedita distinctio. 296 |

297 |
298 |
299 |
300 | 301 |
302 |

Code examples

303 | 304 | 
305 |       sudo ipfw pipe 1 config bw 256KByte/s
306 |       sudo ipfw add 1 pipe 1 src-port 3000
307 |
308 | 309 |
310 |
311 |
312 |

Footer

313 | 344 |
345 | 346 |
347 |

New hawtness

348 | 80 % 349 |

We are this close to the goal: $824.

350 |
351 | 352 |
353 |
354 |

Random Stuff

355 |
356 | This is for things like copyright info 357 | Content that isn't accurate or relevant anymore. 358 | Generic span wrapper 359 | HTML How to meet ladies 360 |

This is inline text with subscript and superscript elements.

361 |

362 | f(x) = a0 + a1x + 363 | a2x2, where a2 ≠ 0 364 |

365 | 366 |
367 | 368 |
369 |
370 | Figure Example 371 |
372 | Photo of the sky at night. Original by @mrmrs 373 |
374 |
375 |
376 | 377 |
378 | 381 | 382 | 
383 |           /Sites/html master  ☠ ☢
384 |           $  ls -gto
385 | 
386 |           total 104
387 |           -rw-r--r--   1   10779 Jun  5 16:24 index.html
388 |           -rw-r--r--   1    1255 Jun  5 16:00 _config.yml
389 |           drwxr-xr-x  11     374 Jun  5 15:57 _site
390 |           -rw-r--r--   1    1597 Jun  5 14:16 README.md
391 |           drwxr-xr-x   5     170 Jun  5 14:15 _sass
392 |           -rw-r--r--   1     564 Jun  4 15:59 Rakefile
393 |           drwxr-xr-x   6     204 Jun  4 15:59 _includes
394 |           drwxr-xr-x   4     136 Jun  4 15:59 _layouts
395 |           drwxr-xr-x   3     102 Jun  4 15:59 _resources
396 |           drwxr-xr-x   3     102 Jun  4 15:59 css
397 |           -rw-r--r--   1    1977 Jun  4 15:59 favicon.icns
398 |           -rw-r--r--   1    6518 Jun  4 15:59 favicon.ico
399 |           -rw-r--r--   1    1250 Jun  4 15:59 touch-icon-ipad-precomposed.png
400 |           -rw-r--r--   1    2203 Jun  4 15:59 touch-icon-ipad-retina-precomposed.png
401 |           -rw-r--r--   1    1046 Jun  4 15:59 touch-icon-iphone-precomposed.png
402 |           -rw-r--r--   1    1779 Jun  4 15:59 touch-icon-iphone-retina-precomposed.png
403 |
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406 |
407 |

Tables

408 | 426 | 427 | 428 | 429 | 430 | 431 | 432 | 433 | 434 | 435 | 436 | 437 | 438 | 439 | 440 | 441 | 442 | 443 | 444 | 445 | 446 | 447 | 448 | 449 | 450 | 451 | 452 | 453 | 454 | 455 |
This is a caption for a table
IDNameDateAddress
Table footer info
#999-32acFirst Name13 May, 2013999 Spruce Lane, Somewhere, CA 94101
#888-32ddSample Name17 May, 1984999 Spruce Lane, Somewhere, CA 94101
456 |
457 |
458 |

Footer

459 |
460 | © 2014 Some company name 461 |
email@email.com
462 |
463 |
464 | 465 | 466 | 467 | 468 | -------------------------------------------------------------------------------- /benches/my_benchmark.rs: -------------------------------------------------------------------------------- 1 | use criterion::{criterion_group, criterion_main, Criterion, black_box}; 2 | use rusthtml; 3 | 4 | pub fn criterion_benchmark(c: &mut Criterion) { 5 | let example_source = black_box(include_str!("example.html")); 6 | let example_full_source = black_box(include_str!("full_example.html")); 7 | let habrahabr = black_box(include_str!("page_habrahabr-70330.html")); 8 | c.bench_function("example", |b| b.iter(|| rusthtml::ElementContent::parse(rusthtml::HtmlTag::parse(example_source)).unwrap())); 9 | c.bench_function("full example", |b| b.iter(|| rusthtml::ElementContent::parse(rusthtml::HtmlTag::parse(example_full_source)).unwrap())); 10 | c.bench_function("habrahabr-70330", |b| b.iter(|| rusthtml::ElementContent::parse(rusthtml::HtmlTag::parse(habrahabr)).unwrap())); 11 | } 12 | 13 | criterion_group!(benches, criterion_benchmark); 14 | criterion_main!(benches); 15 | 16 | -------------------------------------------------------------------------------- /src/lib.rs: -------------------------------------------------------------------------------- 1 | #[cfg(test)] 2 | mod tests; 3 | 4 | /// A tag "completer" that fill in some missing tags allowed by html specification 5 | /// 6 | /// Some html tags are allowed to be "inferred" in specific location; however, our parser does not 7 | /// allow this. Thus, this function will "fix" those tags. 8 | /// 9 | /// **This function is currently significantly incomplete compared to html specification.** 10 | /// 11 | /// ``` 12 | /// # extern crate rusthtml; 13 | /// # use rusthtml::*; 14 | /// let parsed = ElementContent::parse(tag_optimize(HtmlTag::parse( 15 | /// r#""#, 16 | /// ))); 17 | /// assert_eq!(parsed, 18 | /// Ok(vec![ 19 | /// ElementContent::HtmlElement(Box::new(HtmlElement { 20 | /// name: "img", 21 | /// attributes: vec![("abc", None)], 22 | /// tag_state: ElementTagState::BothTag, 23 | /// content: Vec::new(), 24 | /// }))]) 25 | /// ); 26 | /// ``` 27 | pub fn tag_optimize<'a>(mut content: Vec>) -> Vec> { 28 | let mut offset = 0; 29 | // There should be a better way to do this... 30 | // Despreated. 31 | let _ = |x| match x { 32 | HtmlTag::OpeningTag(i, j) => { 33 | let mut a = j 34 | .iter() 35 | .map(|x| { 36 | if let Some(i) = x.1 { 37 | format!(" {}={}", x.0, i) 38 | } else { 39 | format!(" {}", x.0) 40 | } 41 | }) 42 | .fold(format!("<{}", i), |a, b| { 43 | let mut a = a; 44 | a.push_str(&b); 45 | a 46 | }); 47 | a.push('>'); 48 | a 49 | } 50 | HtmlTag::ClosingTag(i) => format!("", i), 51 | HtmlTag::Unparsable(i) => i.to_string(), 52 | }; 53 | // TODO: implement `template` 54 | // TODO: implement `head`, `body` omition 55 | // This is only a subset of the full rule. More rules should be added to make it complete. 56 | for i in 0..content.len() { 57 | if let HtmlTag::OpeningTag(name, _) = content[i + offset] { 58 | match name { 59 | "area" | "base" | "br" | "col" | "embed" | "hr" | "img" | "input" | "link" 60 | | "meta" | "param" | "source" | "track" | "wbr" => { 61 | content.insert(i + offset + 1, HtmlTag::ClosingTag(name)); 62 | offset += 1; 63 | } 64 | "li" | "dd" | "dt" | "rt" | "rp" | "optgroup" | "tr" | "td" | "th" => { 65 | if let HtmlTag::OpeningTag(name_c, _) = content[i + offset + 1] { 66 | if name_c == name { 67 | content.insert(i + offset + 1, HtmlTag::ClosingTag(name)); 68 | offset += 1; 69 | } 70 | } 71 | } 72 | "p" => { 73 | // TODO: "if there is no more content in the parent element and the parent 74 | // element is an HTML element that is not an a, audio, del, ins, map, noscript, 75 | // or video element, or an autonomous custom element." 76 | if let HtmlTag::OpeningTag(name_c, _) = content[i + offset + 1] { 77 | match name_c { 78 | "address" | "article" | "aside" | "blockquote" | "details" | "div" 79 | | "dl" | "fieldset" | "figcaption" | "figure" | "footer" | "form" 80 | | "h1" | "h2" | "h3" | "h4" | "h5" | "h6" | "header" | "hgroup" 81 | | "hr" | "main" | "menu" | "nav" | "ol" | "p" | "pre" | "section" 82 | | "table" | "ul" => { 83 | content.insert(i + offset + 1, HtmlTag::ClosingTag("p")); 84 | offset += 1; 85 | } 86 | _ => {} 87 | } 88 | } 89 | } 90 | _ => {} 91 | } 92 | } 93 | } 94 | 95 | content 96 | } 97 | 98 | /// Possible tag state of an element 99 | #[derive(PartialEq, Debug)] 100 | pub enum ElementTagState { 101 | OnlyStartTag, 102 | OnlyEndTag, 103 | BothTag, 104 | } 105 | /// Possible content of an element 106 | #[derive(PartialEq, Debug)] 107 | pub enum ElementContent<'a> { 108 | HtmlElement(Box>), 109 | LiteralContent(&'a str), 110 | } 111 | /// A html element 112 | #[derive(PartialEq, Debug)] 113 | pub struct HtmlElement<'a> { 114 | /// Name of the element 115 | pub name: &'a str, 116 | /// Attributes of the element 117 | pub attributes: Vec<(&'a str, Option<&'a str>)>, 118 | /// Possible tag state of an element 119 | pub tag_state: ElementTagState, 120 | /// Contents of the element 121 | pub content: Vec>, 122 | } 123 | impl<'a> ElementContent<'a> { 124 | /// Parse a vector of html tag to elements 125 | /// 126 | /// # Errors 127 | /// 128 | /// If the input content contains ending tag of a non-existing element, the function will 129 | /// yield an error. 130 | pub fn parse(content: Vec>) -> Result, ()> { 131 | let mut constructed = Vec::new(); 132 | for i in content { 133 | match i { 134 | HtmlTag::OpeningTag(i, j) => { 135 | constructed.push(Self::HtmlElement(Box::new(HtmlElement { 136 | name: i, 137 | attributes: j, 138 | tag_state: ElementTagState::OnlyStartTag, 139 | content: Vec::new(), 140 | }))) 141 | } 142 | HtmlTag::ClosingTag(i) => { 143 | let mut tag_content = Vec::new(); 144 | while constructed.len() != 0 { 145 | if let Self::HtmlElement(k) = &constructed[constructed.len() - 1] { 146 | if k.name == i { 147 | break; 148 | } 149 | } 150 | tag_content.push(constructed.remove(constructed.len() - 1)); 151 | } 152 | if constructed.len() == 0 { 153 | return Err(()); 154 | } 155 | let mut last_ref = if let Some(i) = constructed.last_mut() { 156 | if let Self::HtmlElement(i) = i { 157 | i 158 | } else { 159 | unsafe { core::hint::unreachable_unchecked() } 160 | } 161 | } else { 162 | unsafe { core::hint::unreachable_unchecked() } 163 | }; 164 | tag_content.reverse(); 165 | last_ref.content.append(&mut tag_content); 166 | last_ref.tag_state = ElementTagState::BothTag; 167 | } 168 | HtmlTag::Unparsable(i) => constructed.push(Self::LiteralContent(i)), 169 | } 170 | } 171 | Ok(constructed) 172 | } 173 | } 174 | 175 | /// Raw html tag 176 | #[derive(PartialEq, Debug)] 177 | pub enum HtmlTag<'a> { 178 | OpeningTag(&'a str, Vec<(&'a str, Option<&'a str>)>), 179 | ClosingTag(&'a str), 180 | Unparsable(&'a str), 181 | } 182 | impl<'a> HtmlTag<'a> { 183 | /// Parse a html to tags 184 | pub fn parse(content: &'a str) -> Vec { 185 | let mut last_splitn = 0; 186 | let mut constructed = Vec::new(); 187 | let unparsable_content_push = |index, last_splitn, constructed: &mut Vec<_>| { 188 | if last_splitn != 0 && !content[last_splitn + 1..index].trim().is_empty() { 189 | constructed.push(Self::Unparsable(&content[last_splitn + 1..index])) 190 | } 191 | }; 192 | let mut ignore_parsing = None; 193 | for (index, i) in content.char_indices() { 194 | if i == '<' { 195 | if ignore_parsing.is_none() { 196 | unparsable_content_push(index, last_splitn, &mut constructed); 197 | } 198 | last_splitn = index; 199 | } else if i == '>' { 200 | let tag = &content[last_splitn..index]; 201 | if tag.chars().nth(0).unwrap() != '<' { 202 | continue; 203 | } 204 | let tag = &tag[1..].trim_start(); 205 | let constru = if tag.chars().nth(0) == Some('/') { 206 | if let Some((i, j)) = ignore_parsing { 207 | if i == &tag[1..] { 208 | ignore_parsing = None; 209 | constructed.push(HtmlTag::Unparsable(&content[j..last_splitn])); 210 | } else { 211 | continue; 212 | } 213 | } 214 | Self::ClosingTag(&tag[1..]) 215 | } else if tag.chars().nth(0) == Some('!') { 216 | Self::Unparsable(tag) 217 | } else { 218 | if ignore_parsing.is_some() { 219 | continue; 220 | } 221 | let parsed = Self::parse_opening_tag_content(tag); 222 | if (parsed.0 == "script") 223 | | (parsed.0 == "style") 224 | | (parsed.0 == "textarea") 225 | | (parsed.0 == "title") 226 | { 227 | ignore_parsing = Some((parsed.0, index + 1)); 228 | } 229 | Self::OpeningTag(parsed.0, parsed.1) 230 | }; 231 | constructed.push(constru); 232 | last_splitn = index; 233 | } 234 | } 235 | constructed 236 | } 237 | fn parse_opening_tag_content(content: &'a str) -> (&'a str, Vec<(&'a str, Option<&'a str>)>) { 238 | let content = content.trim(); 239 | #[derive(PartialEq)] 240 | enum QuoteStatus { 241 | NoQuote, 242 | SingleQuote, 243 | DoubleQuote, 244 | BangQuote, 245 | }; 246 | let mut current_quotation = QuoteStatus::NoQuote; 247 | let mut splitted_content = Vec::new(); 248 | let mut space_position = 0; 249 | let mut is_empty = true; 250 | let length = content.chars().count(); 251 | for (index, i) in content.char_indices() { 252 | if i == ' ' && current_quotation == QuoteStatus::NoQuote && !is_empty { 253 | // This is appropriate split position 254 | if space_position != 0 { 255 | space_position += 1; 256 | } 257 | //println!("{} {}", space_position, index); 258 | splitted_content.push(&content[space_position..index]); 259 | is_empty = true; 260 | space_position = index; 261 | } else if index + 1 == length { 262 | splitted_content.push(&content[space_position..].trim_start()); 263 | space_position = index + 1; 264 | } else if (i == '"') | (i == '\'') | (i == '!') { 265 | current_quotation = match current_quotation { 266 | QuoteStatus::NoQuote => { 267 | if i == '"' { 268 | QuoteStatus::DoubleQuote 269 | } else if i == '\'' { 270 | QuoteStatus::SingleQuote 271 | } else { 272 | QuoteStatus::BangQuote 273 | } 274 | } 275 | _ => QuoteStatus::NoQuote, 276 | }; 277 | } 278 | if i != ' ' { 279 | is_empty = false; 280 | } 281 | } 282 | if splitted_content.len() == 0 { 283 | return ("", Vec::new()); 284 | } 285 | let name = splitted_content.remove(0); 286 | let splitted_content = splitted_content 287 | .iter_mut() 288 | .map(|x| { 289 | let equal_sign = x.rfind('='); 290 | match equal_sign { 291 | Some(i) => ( 292 | &x[..i], 293 | Some(x[i + 1..].trim_matches(|c| (c == '"') | (c == '\''))), 294 | ), 295 | None => (&x[..], None), 296 | } 297 | }) 298 | .collect(); 299 | (name, splitted_content) 300 | } 301 | } 302 | -------------------------------------------------------------------------------- /src/tests.rs: -------------------------------------------------------------------------------- 1 | use crate::*; 2 | #[test] 3 | fn tag_works() { 4 | let parsed = HtmlTag::parse(r#"

Hello World!

"#); 5 | assert_eq!( 6 | parsed, 7 | vec![ 8 | HtmlTag::OpeningTag( 9 | "p", 10 | vec![ 11 | ("class", Some("abc")), 12 | ("def", Some("ghi jkl")), 13 | ("mno", None) 14 | ] 15 | ), 16 | HtmlTag::Unparsable("Hello World!"), 17 | HtmlTag::ClosingTag("p") 18 | ] 19 | ) 20 | } 21 | #[test] 22 | fn element_works() { 23 | let parsed = ElementContent::parse(tag_optimize(HtmlTag::parse( 24 | r#"

Hello!

This is a test"#, 25 | ))); 26 | assert_eq!( 27 | parsed, 28 | Ok(vec![ 29 | ElementContent::HtmlElement(Box::new(HtmlElement { 30 | name: "p", 31 | attributes: vec![("class", Some("abc"))], 32 | tag_state: ElementTagState::BothTag, 33 | content: vec![ 34 | ElementContent::LiteralContent("Hello!"), 35 | ElementContent::HtmlElement(Box::new(HtmlElement { 36 | name: "img", 37 | attributes: vec![("src", Some("abc")), ("def", None)], 38 | tag_state: ElementTagState::BothTag, 39 | content: Vec::new() 40 | })) 41 | ] 42 | })), 43 | ElementContent::HtmlElement(Box::new(HtmlElement { 44 | name: "title", 45 | attributes: Vec::new(), 46 | tag_state: ElementTagState::BothTag, 47 | content: vec![ElementContent::LiteralContent("This is a test")] 48 | })) 49 | ]) 50 | ); 51 | } 52 | #[test] 53 | fn almost_all() { 54 | let source = include_str!("../benches/example.html"); 55 | ElementContent::parse(tag_optimize(HtmlTag::parse(source))).unwrap(); 56 | } 57 | #[test] 58 | fn unicode_characters() { 59 | let parsed = ElementContent::parse(tag_optimize(HtmlTag::parse( 60 | r#"

Hello!

Löwe 老虎 Léopard"#, 61 | ))); 62 | assert_eq!( 63 | parsed, 64 | Ok(vec![ 65 | ElementContent::HtmlElement(Box::new(HtmlElement { 66 | name: "p", 67 | attributes: vec![("class", Some("❤"))], 68 | tag_state: ElementTagState::BothTag, 69 | content: vec![ 70 | ElementContent::LiteralContent("Hello!"), 71 | ElementContent::HtmlElement(Box::new(HtmlElement { 72 | name: "img", 73 | attributes: vec![("src", Some("abc"))], 74 | tag_state: ElementTagState::BothTag, 75 | content: Vec::new() 76 | })) 77 | ] 78 | })), 79 | ElementContent::HtmlElement(Box::new(HtmlElement { 80 | name: "title", 81 | attributes: Vec::new(), 82 | tag_state: ElementTagState::BothTag, 83 | content: vec![ElementContent::LiteralContent("Löwe 老虎 Léopard")] 84 | })), 85 | ElementContent::HtmlElement(Box::new(HtmlElement { 86 | name: "script", 87 | attributes: Vec::new(), 88 | tag_state: ElementTagState::BothTag, 89 | content: vec![ElementContent::LiteralContent("This should not too")] 90 | })) 91 | ]) 92 | ); 93 | } 94 | --------------------------------------------------------------------------------