po/xgettext-html

   1 #!/usr/bin/env node
   2 /*
   3  * xgettext-html: HTML gettext parser
   4  * Copyright (C) 2016 Pierre Ossman
   5  * Licensed under MPL 2.0 (see LICENSE.txt)
   6  */
   7
   8 const getopt = require('node-getopt');
   9 const jsdom = require("jsdom");
  10 const fs = require("fs");
  11
  12 const opt = getopt.create([
  13     ['o' , 'output=FILE'      , 'write output to specified file'],
  14     ['h' , 'help'             , 'display this help'],
  15 ]).bindHelp().parseSystem();
  16
  17 const strings = {};
  18
  19 function addString(str, location) {
  20     if (str.length == 0) {
  21         return;
  22     }
  23
  24     if (strings[str] === undefined) {
  25         strings[str] = {}
  26     }
  27     strings[str][location] = null;
  28 }
  29
  30 // See https://html.spec.whatwg.org/multipage/dom.html#attr-translate
  31 function process(elem, locator, enabled) {
  32     function isAnyOf(searchElement, items) {
  33         return items.indexOf(searchElement) !== -1;
  34     }
  35
  36     if (elem.hasAttribute("translate")) {
  37         if (isAnyOf(elem.getAttribute("translate"), ["", "yes"])) {
  38             enabled = true;
  39         } else if (isAnyOf(elem.getAttribute("translate"), ["no"])) {
  40             enabled = false;
  41         }
  42     }
  43
  44     if (enabled) {
  45         if (elem.hasAttribute("abbr") &&
  46             elem.tagName === "TH") {
  47             addString(elem.getAttribute("abbr"), locator(elem));
  48         }
  49         if (elem.hasAttribute("alt") &&
  50             isAnyOf(elem.tagName, ["AREA", "IMG", "INPUT"])) {
  51             addString(elem.getAttribute("alt"), locator(elem));
  52         }
  53         if (elem.hasAttribute("download") &&
  54             isAnyOf(elem.tagName, ["A", "AREA"])) {
  55             addString(elem.getAttribute("download"), locator(elem));
  56         }
  57         if (elem.hasAttribute("label") &&
  58             isAnyOf(elem.tagName, ["MENUITEM", "MENU", "OPTGROUP",
  59                                    "OPTION", "TRACK"])) {
  60             addString(elem.getAttribute("label"), locator(elem));
  61         }
  62         if (elem.hasAttribute("placeholder") &&
  63             isAnyOf(elem.tagName in ["INPUT", "TEXTAREA"])) {
  64             addString(elem.getAttribute("placeholder"), locator(elem));
  65         }
  66         if (elem.hasAttribute("title")) {
  67             addString(elem.getAttribute("title"), locator(elem));
  68         }
  69         if (elem.hasAttribute("value") &&
  70             elem.tagName === "INPUT" &&
  71             isAnyOf(elem.getAttribute("type"), ["reset", "button", "submit"])) {
  72             addString(elem.getAttribute("value"), locator(elem));
  73         }
  74     }
  75
  76     for (let i = 0; i < elem.childNodes.length; i++) {
  77         node = elem.childNodes[i];
  78         if (node.nodeType === node.ELEMENT_NODE) {
  79             process(node, locator, enabled);
  80         } else if (node.nodeType === node.TEXT_NODE && enabled) {
  81             addString(node.data.trim(), locator(node));
  82         }
  83     }
  84 }
  85
  86 for (let i = 0; i < opt.argv.length; i++) {
  87     const fn = opt.argv[i];
  88     const file = fs.readFileSync(fn, "utf8");
  89     const dom = new jsdom.JSDOM(file, { includeNodeLocations: true });
  90     const body = dom.window.document.body;
  91
  92     const locator = (elem) => {
  93         const offset = dom.nodeLocation(elem).startOffset;
  94         const line = file.slice(0, offset).split("\n").length;
  95         return fn + ":" + line;
  96     };
  97
  98     process(body, locator, true);
  99 }
 100
 101 let output = "";
 102
 103 for (str in strings) {
 104     output += "#:";
 105     for (location in strings[str]) {
 106         output += " " + location;
 107     }
 108     output += "\n";
 109
 110     output += "msgid " + JSON.stringify(str) + "\n";
 111     output += "msgstr \"\"\n";
 112     output += "\n";
 113 }
 114
 115 fs.writeFileSync(opt.options.output, output);