├── .gitignore ├── logo └── logo.png ├── .vscodeignore ├── tsconfig.json ├── src ├── test │ ├── suite │ │ ├── extension.test.ts │ │ └── index.ts │ └── runTest.ts ├── extension.ts └── markdown-formula.ts ├── .eslintrc.json ├── package.json ├── README.md └── LICENSE /.gitignore: -------------------------------------------------------------------------------- 1 | node_modules 2 | out 3 | .vscode 4 | .vscode-test -------------------------------------------------------------------------------- /logo/logo.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/cescript/MarkdownFormula/HEAD/logo/logo.png -------------------------------------------------------------------------------- /.vscodeignore: -------------------------------------------------------------------------------- 1 | .vscode/** 2 | .vscode-test/** 3 | out/test/** 4 | 5 | src/** 6 | .gitignore 7 | .yarnrc 8 | vsc-extension-quickstart.md 9 | **/tsconfig.json 10 | **/.eslintrc.json 11 | **/*.map 12 | **/*.ts 13 | -------------------------------------------------------------------------------- /tsconfig.json: -------------------------------------------------------------------------------- 1 | { 2 | "compilerOptions": { 3 | "module": "commonjs", 4 | "target": "es6", 5 | "outDir": "out", 6 | "lib": [ 7 | "es6" 8 | ], 9 | "sourceMap": true, 10 | "rootDir": "src", 11 | "strict": true, /* enable all strict type-checking options */ 12 | }, 13 | "exclude": [ 14 | "node_modules", 15 | ".vscode-test" 16 | ] 17 | } 18 | -------------------------------------------------------------------------------- /src/test/suite/extension.test.ts: -------------------------------------------------------------------------------- 1 | import * as assert from 'assert'; 2 | 3 | // You can import and use all API from the 'vscode' module 4 | // as well as import your extension to test it 5 | import * as vscode from 'vscode'; 6 | // import * as myExtension from '../../extension'; 7 | 8 | suite('Extension Test Suite', () => { 9 | vscode.window.showInformationMessage('Start all tests.'); 10 | 11 | test('Sample test', () => { 12 | assert.strictEqual(-1, [1, 2, 3].indexOf(5)); 13 | assert.strictEqual(-1, [1, 2, 3].indexOf(0)); 14 | }); 15 | }); 16 | -------------------------------------------------------------------------------- /.eslintrc.json: -------------------------------------------------------------------------------- 1 | { 2 | "root": true, 3 | "parser": "@typescript-eslint/parser", 4 | "parserOptions": { 5 | "ecmaVersion": 6, 6 | "sourceType": "module" 7 | }, 8 | "plugins": [ 9 | "@typescript-eslint" 10 | ], 11 | "rules": { 12 | "@typescript-eslint/naming-convention": "warn", 13 | "@typescript-eslint/semi": "warn", 14 | "curly": "warn", 15 | "eqeqeq": "warn", 16 | "no-throw-literal": "warn", 17 | "semi": "off" 18 | }, 19 | "ignorePatterns": [ 20 | "out", 21 | "dist", 22 | "**/*.d.ts" 23 | ] 24 | } 25 | -------------------------------------------------------------------------------- /src/test/runTest.ts: -------------------------------------------------------------------------------- 1 | import * as path from 'path'; 2 | 3 | import { runTests } from 'vscode-test'; 4 | 5 | async function main() { 6 | try { 7 | // The folder containing the Extension Manifest package.json 8 | // Passed to `--extensionDevelopmentPath` 9 | const extensionDevelopmentPath = path.resolve(__dirname, '../../'); 10 | 11 | // The path to test runner 12 | // Passed to --extensionTestsPath 13 | const extensionTestsPath = path.resolve(__dirname, './suite/index'); 14 | 15 | // Download VS Code, unzip it and run the integration test 16 | await runTests({ extensionDevelopmentPath, extensionTestsPath }); 17 | } catch (err) { 18 | console.error('Failed to run tests'); 19 | process.exit(1); 20 | } 21 | } 22 | 23 | main(); 24 | -------------------------------------------------------------------------------- /src/test/suite/index.ts: -------------------------------------------------------------------------------- 1 | import * as path from 'path'; 2 | import * as Mocha from 'mocha'; 3 | import * as glob from 'glob'; 4 | 5 | export function run(): Promise { 6 | // Create the mocha test 7 | const mocha = new Mocha({ 8 | ui: 'tdd', 9 | color: true 10 | }); 11 | 12 | const testsRoot = path.resolve(__dirname, '..'); 13 | 14 | return new Promise((c, e) => { 15 | glob('**/**.test.js', { cwd: testsRoot }, (err, files) => { 16 | if (err) { 17 | return e(err); 18 | } 19 | 20 | // Add files to the test suite 21 | files.forEach(f => mocha.addFile(path.resolve(testsRoot, f))); 22 | 23 | try { 24 | // Run the mocha test 25 | mocha.run(failures => { 26 | if (failures > 0) { 27 | e(new Error(`${failures} tests failed.`)); 28 | } else { 29 | c(); 30 | } 31 | }); 32 | } catch (err) { 33 | console.error(err); 34 | e(err); 35 | } 36 | }); 37 | }); 38 | } 39 | -------------------------------------------------------------------------------- /src/extension.ts: -------------------------------------------------------------------------------- 1 | // The module 'vscode' contains the VS Code extensibility API 2 | // Import the module and reference it with the alias vscode in your code below 3 | import * as vscode from 'vscode'; 4 | import { MarkdownFormula } from './markdown-formula'; 5 | 6 | // this method is called when your extension is activated 7 | // your extension is activated the very first time the command is executed 8 | export function activate(context: vscode.ExtensionContext) { 9 | 10 | // print info to terminal 11 | console.log('markdown-formula is now active!'); 12 | 13 | // register calculate command 14 | const disposable = vscode.commands.registerCommand('extension.calculate', function () { 15 | // Get the active text editor 16 | const editor = vscode.window.activeTextEditor; 17 | 18 | // if editor found 19 | if (editor) { 20 | const documentText = editor.document.getText(); 21 | 22 | // get the configuration 23 | let precisionRounding = vscode.workspace.getConfiguration('markdown-formula')['precisionRounding']; 24 | let includeTableHeaderInCellNumaration = vscode.workspace.getConfiguration('markdown-formula')['includeTableHeaderInCellNumaration']; 25 | 26 | // get the markdown formulas and evaluated results 27 | let content = MarkdownFormula(documentText, precisionRounding, includeTableHeaderInCellNumaration); 28 | console.log(content); 29 | 30 | // replace all the detected formulas with the calculated values 31 | editor.edit(editBuilder => { 32 | content.forEach(item => { 33 | let start = new vscode.Position(item.locations[0], item.locations[1]); 34 | let end = new vscode.Position(item.locations[0], item.locations[1]+item.locations[2]); 35 | 36 | // replace the lines in between 37 | editBuilder.replace(new vscode.Range(start, end), item.data); 38 | }) 39 | }).then(undefined, err => { 40 | console.error(err); 41 | }); 42 | } 43 | }); 44 | 45 | context.subscriptions.push(disposable); 46 | 47 | // run on save 48 | let calculateOnSave = vscode.workspace.getConfiguration('markdown-formula')['calculateOnSave']; 49 | if(calculateOnSave) { 50 | context.subscriptions.push(vscode.workspace.onWillSaveTextDocument((td) => { 51 | vscode.commands.executeCommand('extension.calculate') 52 | })); 53 | } 54 | } 55 | 56 | // this method is called when your extension is deactivated 57 | export function deactivate() {} 58 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "markdown-formula", 3 | "displayName": "markdown-formula", 4 | "description": "Use Excel-like formulas in markdown tables", 5 | "version": "0.0.6", 6 | "publisher": "cescript", 7 | "license": "GPLv3", 8 | "repository": { 9 | "url": "https://github.com/cescript/MarkdownFormula" 10 | }, 11 | "keywords": [ 12 | "markdown", 13 | "formula", 14 | "excel" 15 | ], 16 | "icon": "logo/logo.png", 17 | "engines": { 18 | "vscode": "^1.60.0" 19 | }, 20 | "categories": [ 21 | "Other" 22 | ], 23 | "activationEvents": [ 24 | "onCommand:extension.calculate", 25 | "onLanguage:markdown" 26 | ], 27 | "main": "./out/extension.js", 28 | "contributes": { 29 | "commands": [{ 30 | "command": "extension.calculate", 31 | "title": "Calculate all formulas" 32 | }], 33 | "configuration": { 34 | "title": "Markdown Formula Settings", 35 | "properties": { 36 | "markdown-formula.precisionRounding": { 37 | "type": "number", 38 | "default": 4, 39 | "description": "Rounding precision for floating point numbers" 40 | }, 41 | "markdown-formula.includeTableHeaderInCellNumaration": { 42 | "type": "boolean", 43 | "default": false, 44 | "description": "Include the header as the first row (1:1) in enumaration" 45 | }, 46 | "markdown-formula.calculateOnSave": { 47 | "type": "boolean", 48 | "default": true, 49 | "description": "Calculate and update formulas on save (reload required to take effect)" 50 | } 51 | } 52 | } 53 | }, 54 | "scripts": { 55 | "vscode:prepublish": "npm run compile", 56 | "compile": "tsc -p ./", 57 | "watch": "tsc -watch -p ./", 58 | "pretest": "npm run compile && npm run lint", 59 | "lint": "eslint src --ext ts", 60 | "test": "node ./out/test/runTest.js" 61 | }, 62 | "devDependencies": { 63 | "@types/vscode": "^1.60.0", 64 | "@types/glob": "^7.1.3", 65 | "@types/mocha": "^8.2.2", 66 | "@types/node": "14.x", 67 | "eslint": "^7.27.0", 68 | "@typescript-eslint/eslint-plugin": "^4.26.0", 69 | "@typescript-eslint/parser": "^4.26.0", 70 | "glob": "^7.1.7", 71 | "mocha": "^8.4.0", 72 | "typescript": "^4.3.2", 73 | "vscode-test": "^1.5.2" 74 | }, 75 | "dependencies": { 76 | "hyperformula": "^1.2.0" 77 | } 78 | } -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Markdown Formula 2 | *markdown formula* is a Visual Studio Code extension which evaluates Excel-like formulas in markdown tables. To make markdown readable with other parsers and to emphazise that the cell value is the output of a formula, link style formatting is used to create a formula. The structure of a *markdown formula* consist of two parts: 3 | 4 | ``` 5 | [VALUE](#FORMULA) 6 | ``` 7 | 8 | Here, "#FORMULA" is the Excel-like formula which will be evaluated. The hash symbol (#) is used to identify the *markdown-formula* and it is a replacement for '=' sign in Excel formulas. The purpose of using '#' instead of '=' is to take advantage of the URI fragments and create valid URL address from the given formulas. The "VALUE" is the result of the "#FORMULA" and automatically generated by this extension. All the calculations are fulfilled via the popular open-source library [HyperFormula](https://handsontable.github.io/hyperformula/). 9 | 10 | Using the Excel-like naming convention, table columns are addressed with letters (A,B,...) and the table rows are addressed with numbers (1,2,..). 11 | 12 | *markdown formula* parses all the tables in the current document and seperates them as sheets. If a comment line ('\') exist just before the table header, it is assigned as the sheetname for the table. If a comment line does not exist, the sheet name is automatically generated as "Sheet#N" where the #N is the zero based order of the table in the document. 13 | 14 | ## Basic Example 15 | In this basic example, we have a table which consist of five rows and three columns. The last column of the first two rows (namely C1 and C2) are used to construct the (C3:C5) rows. 16 | 17 | 18 | | name | formula | values | 19 | | -------------- | --------------- | ---------------------- | 20 | | three | - | 3 | 21 | | eight | - | 8 | 22 | | summation | #SUM(C1:C2) | [11](#SUM(C1:C2)) | 23 | | multiplication | #C1*C2 | [24](#C1*C2) | 24 | | average | #AVERAGE(C1:C2) | [5.5](#AVERAGE(C1:C2)) | 25 | 26 | ## Using Cells From Other Sheets 27 | In this example, we will use the cells of the previous table in our current table. 28 | 29 | 30 | | name | formula | values1 | values2 | 31 | | --------------------- | ----------------------------------------- | ------------------------- | ------------------------- | 32 | | six and one | - | 6 | 1 | 33 | | summation from table1 | #table1!C3 | 4 | [11](#table1!C3) | 34 | | summation and average | #SUM(C1:D2),#AVERAGE(C1:D2) | [22](#SUM(C1:D2)) | [5.5](#AVERAGE(C1:D2)) | 35 | | count larger than 3 | #COUNTIF(C1:C3,">3"),#COUNTIF(D1:D3,">3") | [3](#COUNTIF(C1:C3,">3")) | [2](#COUNTIF(D1:D3,">3")) | 36 | 37 | ## Extension Settings 38 | *markdown formula* has some customization options under the VS Code's settings panel. 39 | 40 | - **precisionRounding**: Rounding precision for floating point numbers can be set. 41 | - **includeTableHeaderInCellNumaration**: If set to true, the table header is included as the first row in cell enumaration. 42 | - **calculateOnSave**: If set to true, the formulas on the tables will be recalculated and the tables will be updated before writing the file to the disk. 43 | 44 | ## How to Use 45 | You have three alternatives to install this extension. 46 | 47 | 1. Download it from [VS Code Extension Marketplace](https://marketplace.visualstudio.com/vscode). 48 | 2. Download the prebuilt version under the [releases](https://github.com/cescript/MarkdownFormula/releases) tab 49 | 3. Build it from the source 50 | 51 | After installing the extension; 52 | - Open a document which contains markdown tables and formulas 53 | - Save the document to automatically calculate the formulas or Press Ctrl+Shift+P to run a command, write "Calculate all formulas" and press Enter to manually update the formulas 54 | - All the formula cells in your document should be updated with the calculated values -------------------------------------------------------------------------------- /src/markdown-formula.ts: -------------------------------------------------------------------------------- 1 | import { HyperFormula, SimpleCellAddress } from 'hyperformula'; 2 | 3 | // table struct 4 | type TableCell = { 5 | line: number; 6 | column: number; 7 | content: string; 8 | }; 9 | 10 | type TableContent = { 11 | sheet: string; 12 | data: TableCell[][]; 13 | }; 14 | 15 | type FormulaReturn = { 16 | address: SimpleCellAddress[]; 17 | locations: number[][]; 18 | formulas: string[]; 19 | data: string [][]; 20 | } 21 | 22 | // return the locations of the found formulas and the replacement values 23 | // locations: [lineNumber, column] 24 | // data: [#val](##formula) 25 | export type MarkdownReturn = { 26 | locations: number[]; 27 | data: string; 28 | } 29 | 30 | // given the document, parse valid tables 31 | export function MarkdownFormula(document:string, precisionRounding:number, includeTableHeaderInCellNumaration:boolean):MarkdownReturn[] { 32 | 33 | // split document into lines 34 | let allLines: string[] = document.split(/\r?\n/gm) 35 | 36 | // find the tables 37 | let tableCanditates = SplitValidMarkdownTables(allLines, includeTableHeaderInCellNumaration); 38 | 39 | // print the tables 40 | console.log("markdown-formula detected %d valid tables!", tableCanditates.length); 41 | 42 | // check the precision level 43 | if(precisionRounding < 0) { 44 | console.log("invalid precision level!"); 45 | precisionRounding = 4; 46 | } 47 | 48 | // create hyperformula option 49 | const options = { 50 | precisionRounding: precisionRounding, 51 | licenseKey: 'gpl-v3', 52 | }; 53 | 54 | // build an instance with defined options 55 | const hfInstance = HyperFormula.buildEmpty(options); 56 | 57 | // create output 58 | let output:MarkdownReturn[] = []; 59 | 60 | // formulas in table 61 | let allFormulaData: FormulaReturn[] = []; 62 | 63 | // create data pointer for table content 64 | for(let i = 0; i < tableCanditates.length; i++) 65 | { 66 | // add the current table to hfInstance 67 | const sheetNameI = hfInstance.addSheet(tableCanditates[i].sheet); 68 | const sheetIdI = hfInstance.getSheetId(sheetNameI); 69 | 70 | // not possible but ts forces this check 71 | if(typeof sheetIdI !== "undefined") 72 | { 73 | let formulaData = GetFormulaData(tableCanditates[i], sheetIdI); 74 | hfInstance.setSheetContent(sheetIdI, formulaData.data); 75 | allFormulaData.push(formulaData); 76 | } 77 | } 78 | 79 | // go over all formulas and get the results 80 | for(let k = 0; k < allFormulaData.length; k++) 81 | { 82 | // add the cell address to list 83 | for(let i = 0; i < allFormulaData[k].address.length; i++) 84 | { 85 | const val = hfInstance.getCellValue(allFormulaData[k].address[i]); 86 | let result = '[' + val + ']' + '(#' + allFormulaData[k].formulas[i] + ')'; 87 | // push the result into output vector 88 | output.push({data:result, locations: allFormulaData[k].locations[i]}); 89 | } 90 | } 91 | 92 | // return the result 93 | return output; 94 | } 95 | 96 | // split the table into columns 97 | function GetFormulaData(table:TableContent, sheetID:number):FormulaReturn { 98 | 99 | // get the cells of the table 100 | let tableData = table.data; 101 | let output:FormulaReturn = {address:[], locations:[], formulas:[], data:[]}; 102 | 103 | for(let r = 0; r < tableData.length; r++) 104 | { 105 | let rowRdata: string[] = []; 106 | 107 | // loop on the columns 108 | for(let c = 0; c < tableData[r].length; c++) 109 | { 110 | // get the content 111 | let content = tableData[r][c].content; 112 | 113 | // is formula? 114 | let formulaPattern = /\[.*?\]\(#(.*)\)/ 115 | let match = content.match(formulaPattern); 116 | if(match != null && match.index) 117 | { 118 | output.address.push({ col: c, row: r, sheet: sheetID }); 119 | output.locations.push([tableData[r][c].line, tableData[r][c].column + match.index, match[0].length]); 120 | output.formulas.push(match[1]); 121 | content = '=' + match[1]; 122 | } 123 | 124 | // set the content 125 | rowRdata.push(content.trim()); 126 | } 127 | output.data.push(rowRdata); 128 | } 129 | 130 | // split the content into columns 131 | return output; 132 | } 133 | 134 | // returns all consecutive blocks in given array 135 | // [1,2,4,5,6,7,9] => [[1,2],[4,5,6,7]] 136 | function FindConsecutiveBlocks(array:number[]) { 137 | let consecutiveLineArray: number[][] = []; 138 | let consecutiveLines = [array[0]]; 139 | 140 | // go over the all elements 141 | for (let k = 1; k < array.length; k++) { 142 | // if the current element matches the previous element in the block 143 | if ((consecutiveLines[consecutiveLines.length - 1] + 1) == array[k]) { 144 | consecutiveLines.push(array[k]) 145 | } else { 146 | // if block contains at least two lines, accept it 147 | if (consecutiveLines.length >= 2) { 148 | consecutiveLineArray.push(consecutiveLines); 149 | } 150 | // restart the block since it is not consecutive anymore 151 | consecutiveLines = [array[k]] 152 | } 153 | } 154 | 155 | // add the last part if it is not empty 156 | if (consecutiveLines.length >= 2) { 157 | consecutiveLineArray.push(consecutiveLines); 158 | } 159 | 160 | return consecutiveLineArray; 161 | } 162 | 163 | // create array of table cells that contains the all the data in the row 164 | function GetTableColumns(allContent:string[], lineNumber:number) { 165 | 166 | let column:TableCell[] = []; 167 | 168 | // get the cells 169 | let splits = allContent[lineNumber].split('|') 170 | 171 | // parse each column, skip first and last | 172 | var index=0 173 | for(let i = 1; i < splits.length - 1; i++) { 174 | column.push({line:lineNumber, column: index + 1, content:splits[i]}); 175 | index += splits[i].length + 1; 176 | } 177 | 178 | // return the column 179 | return column; 180 | } 181 | 182 | // get the table content 183 | function GetTableContent(allLines:string[], dataLines:number[], sheetID:number, includeTableHeaderInCellNumaration:boolean) 184 | { 185 | // create a table 186 | let table: TableContent = {sheet:'Sheet' + sheetID, data:[]}; 187 | 188 | // push the table header to the data array 189 | if(includeTableHeaderInCellNumaration) { 190 | table.data.push(GetTableColumns(allLines, dataLines[0])); 191 | } 192 | 193 | // fill the table cells, skip the first two rows 194 | for(let i = 2; i < dataLines.length; i++) 195 | { 196 | table.data.push(GetTableColumns(allLines, dataLines[i])); 197 | } 198 | 199 | // find the sheet name if exist 200 | if(dataLines[0] > 0) 201 | { 202 | // get the line just before the header 203 | let possibleSheetName = allLines[dataLines[0]-1]; 204 | // is that line a markdown comment 205 | let matchPattern = possibleSheetName.match(//) 206 | if(matchPattern != null) 207 | { 208 | table.sheet = matchPattern[1].trim(); 209 | } 210 | } 211 | 212 | return table; 213 | } 214 | 215 | // splits the given document into smaller text groups that can be markdown tables 216 | // returns an array of candidate table content and line numbers 217 | function SplitValidMarkdownTables(allLines:string[], includeTableHeaderInCellNumaration:boolean) { 218 | 219 | let candidateLines: number[] = []; 220 | 221 | // check all the lines and test for table pattern 222 | let tablePattern = /^\|(.*)\|$/m 223 | for (let l = 0; l < allLines.length; l++) { 224 | if (tablePattern.test(allLines[l])) { 225 | candidateLines.push(l); 226 | } 227 | } 228 | 229 | // get the consecutive lines as arrays 230 | let blocks = FindConsecutiveBlocks(candidateLines); 231 | 232 | // create table object 233 | let tables: TableContent[] = []; 234 | 235 | // find the blocks that contains formulas 236 | for(let i = 0; i < blocks.length; i++) 237 | { 238 | // check that table contains |---****---| pattern 239 | if(allLines[blocks[i][1]].match(/(?:\|.+?[-]+.+?)+\|/)) 240 | { 241 | // create table if table contains more than two rows (header and ----) 242 | if(blocks[i].length > 2) 243 | { 244 | tables.push(GetTableContent(allLines, blocks[i], tables.length, includeTableHeaderInCellNumaration)); 245 | } 246 | } 247 | } 248 | 249 | // return the valid table 250 | return tables; 251 | } 252 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 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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No Surrender of Others' Freedom. 541 | 542 | If conditions are imposed on you (whether by court order, agreement or 543 | otherwise) that contradict the conditions of this License, they do not 544 | excuse you from the conditions of this License. If you cannot convey a 545 | covered work so as to satisfy simultaneously your obligations under this 546 | License and any other pertinent obligations, then as a consequence you may 547 | not convey it at all. For example, if you agree to terms that obligate you 548 | to collect a royalty for further conveying from those to whom you convey 549 | the Program, the only way you could satisfy both those terms and this 550 | License would be to refrain entirely from conveying the Program. 551 | 552 | 13. Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. 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 | --------------------------------------------------------------------------------