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 var getopt = require('node-getopt');
   9
  10 var jsdom = require("jsdom");
  11 var fs = require("fs");
  12
  13 opt = getopt.create([
  14     ['o' , 'output=FILE'      , 'write output to specified file'],
  15     ['h' , 'help'             , 'display this help'],
  16 ]).bindHelp().parseSystem();
  17
  18 var strings = {};
  19
  20 function addString(str, location) {
  21     if (str.length == 0) {
  22         return;
  23     }
  24
  25     if (strings[str] === undefined) {
  26         strings[str] = {}
  27     }
  28     strings[str][location] = null;
  29 }
  30
  31 // See https://html.spec.whatwg.org/multipage/dom.html#attr-translate
  32 function process(elem, locator, enabled) {
  33     function isAnyOf(searchElement, items) {
  34         return items.indexOf(searchElement) !== -1;
  35     }
  36
  37     if (elem.hasAttribute("translate")) {
  38         if (isAnyOf(elem.getAttribute("translate"), ["", "yes"])) {
  39             enabled = true;
  40         } else if (isAnyOf(elem.getAttribute("translate"), ["no"])) {
  41             enabled = false;
  42         }
  43     }
  44
  45     if (enabled) {
  46         if (elem.hasAttribute("abbr") &&
  47             elem.tagName === "TH") {
  48             addString(elem.getAttribute("abbr"), locator(elem));
  49         }
  50         if (elem.hasAttribute("alt") &&
  51             isAnyOf(elem.tagName, ["AREA", "IMG", "INPUT"])) {
  52             addString(elem.getAttribute("alt"), locator(elem));
  53         }
  54         if (elem.hasAttribute("download") &&
  55             isAnyOf(elem.tagName, ["A", "AREA"])) {
  56             addString(elem.getAttribute("download"), locator(elem));
  57         }
  58         if (elem.hasAttribute("label") &&
  59             isAnyOf(elem.tagName, ["MENUITEM", "MENU", "OPTGROUP",
  60                                    "OPTION", "TRACK"])) {
  61             addString(elem.getAttribute("label"), locator(elem));
  62         }
  63         if (elem.hasAttribute("placeholder") &&
  64             isAnyOf(elem.tagName in ["INPUT", "TEXTAREA"])) {
  65             addString(elem.getAttribute("placeholder"), locator(elem));
  66         }
  67         if (elem.hasAttribute("title")) {
  68             addString(elem.getAttribute("title"), locator(elem));
  69         }
  70         if (elem.hasAttribute("value") &&
  71             elem.tagName === "INPUT" &&
  72             isAnyOf(elem.getAttribute("type"), ["reset", "button", "submit"])) {
  73             addString(elem.getAttribute("value"), locator(elem));
  74         }
  75     }
  76
  77     for (var i = 0;i < elem.childNodes.length;i++) {
  78         node = elem.childNodes[i];
  79         if (node.nodeType === node.ELEMENT_NODE) {
  80             process(node, locator, enabled);
  81         } else if (node.nodeType === node.TEXT_NODE && enabled) {
  82             addString(node.data.trim(), locator(node));
  83         }
  84     }
  85 }
  86
  87 for (var i = 0;i < opt.argv.length;i++) {
  88     var file;
  89
  90     fn = opt.argv[i];
  91     file = fs.readFileSync(fn, "utf8");
  92     dom = new jsdom.JSDOM(file, { includeNodeLocations: true });
  93     body = dom.window.document.body;
  94
  95     locator = function (elem) {
  96         offset = dom.nodeLocation(elem).startOffset;
  97         line = file.slice(0, offset).split("\n").length;
  98         return fn + ":" + line;
  99     };
 100
 101     process(body, locator, true);
 102 }
 103
 104 var output = "";
 105
 106 for (str in strings) {
 107     output += "#:";
 108     for (location in strings[str]) {
 109         output += " " + location;
 110     }
 111     output += "\n";
 112
 113     output += "msgid " + JSON.stringify(str) + "\n";
 114     output += "msgstr \"\"\n";
 115     output += "\n";
 116 }
 117
 118 fs.writeFileSync(opt.options.output, output);