addon-sdk/source/lib/sdk/l10n/html.js@6474c204b198 (annotated)
addon-sdk/source/lib/sdk/l10n/html.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | "use strict"; |
| michael@0 | 5 | |
| michael@0 | 6 | module.metadata = { |
| michael@0 | 7 | "stability": "unstable" |
| michael@0 | 8 | }; |
| michael@0 | 9 | |
| michael@0 | 10 | const { Ci, Cu } = require("chrome"); |
| michael@0 | 11 | const events = require("../system/events"); |
| michael@0 | 12 | const core = require("./core"); |
| michael@0 | 13 | |
| michael@0 | 14 | const assetsURI = require('../self').data.url(); |
| michael@0 | 15 | const { Services } = Cu.import("resource://gre/modules/Services.jsm"); |
| michael@0 | 16 | |
| michael@0 | 17 | const hideContentStyle = "data:text/css,:root {visibility: hidden !important;}"; |
| michael@0 | 18 | const hideSheetUri = Services.io.newURI(hideContentStyle, null, null); |
| michael@0 | 19 | |
| michael@0 | 20 | // Taken from Gaia: |
| michael@0 | 21 | // https://github.com/andreasgal/gaia/blob/04fde2640a7f40314643016a5a6c98bf3755f5fd/webapi.js#L1470 |
| michael@0 | 22 | function translateElement(element) { |
| michael@0 | 23 | element = element || document; |
| michael@0 | 24 | |
| michael@0 | 25 | // check all translatable children (= w/ a `data-l10n-id' attribute) |
| michael@0 | 26 | var children = element.querySelectorAll('*[data-l10n-id]'); |
| michael@0 | 27 | var elementCount = children.length; |
| michael@0 | 28 | for (var i = 0; i < elementCount; i++) { |
| michael@0 | 29 | var child = children[i]; |
| michael@0 | 30 | |
| michael@0 | 31 | // translate the child |
| michael@0 | 32 | var key = child.dataset.l10nId; |
| michael@0 | 33 | var data = core.get(key); |
| michael@0 | 34 | if (data) |
| michael@0 | 35 | child.textContent = data; |
| michael@0 | 36 | } |
| michael@0 | 37 | } |
| michael@0 | 38 | exports.translateElement = translateElement; |
| michael@0 | 39 | |
| michael@0 | 40 | function onDocumentReady2Translate(event) { |
| michael@0 | 41 | let document = event.target; |
| michael@0 | 42 | document.removeEventListener("DOMContentLoaded", onDocumentReady2Translate, |
| michael@0 | 43 | false); |
| michael@0 | 44 | |
| michael@0 | 45 | translateElement(document); |
| michael@0 | 46 | |
| michael@0 | 47 | try { |
| michael@0 | 48 | // Finally display document when we finished replacing all text content |
| michael@0 | 49 | if (document.defaultView) { |
| michael@0 | 50 | let winUtils = document.defaultView.QueryInterface(Ci.nsIInterfaceRequestor) |
| michael@0 | 51 | .getInterface(Ci.nsIDOMWindowUtils); |
| michael@0 | 52 | winUtils.removeSheet(hideSheetUri, winUtils.USER_SHEET); |
| michael@0 | 53 | } |
| michael@0 | 54 | } |
| michael@0 | 55 | catch(e) { |
| michael@0 | 56 | console.exception(e); |
| michael@0 | 57 | } |
| michael@0 | 58 | } |
| michael@0 | 59 | |
| michael@0 | 60 | function onContentWindow(event) { |
| michael@0 | 61 | let document = event.subject; |
| michael@0 | 62 | |
| michael@0 | 63 | // Accept only HTML documents |
| michael@0 | 64 | if (!(document instanceof Ci.nsIDOMHTMLDocument)) |
| michael@0 | 65 | return; |
| michael@0 | 66 | |
| michael@0 | 67 | // Bug 769483: data:URI documents instanciated with nsIDOMParser |
| michael@0 | 68 | // have a null `location` attribute at this time |
| michael@0 | 69 | if (!document.location) |
| michael@0 | 70 | return; |
| michael@0 | 71 | |
| michael@0 | 72 | // Accept only document from this addon |
| michael@0 | 73 | if (document.location.href.indexOf(assetsURI) !== 0) |
| michael@0 | 74 | return; |
| michael@0 | 75 | |
| michael@0 | 76 | try { |
| michael@0 | 77 | // First hide content of the document in order to have content blinking |
| michael@0 | 78 | // between untranslated and translated states |
| michael@0 | 79 | let winUtils = document.defaultView.QueryInterface(Ci.nsIInterfaceRequestor) |
| michael@0 | 80 | .getInterface(Ci.nsIDOMWindowUtils); |
| michael@0 | 81 | winUtils.loadSheet(hideSheetUri, winUtils.USER_SHEET); |
| michael@0 | 82 | } |
| michael@0 | 83 | catch(e) { |
| michael@0 | 84 | console.exception(e); |
| michael@0 | 85 | } |
| michael@0 | 86 | // Wait for DOM tree to be built before applying localization |
| michael@0 | 87 | document.addEventListener("DOMContentLoaded", onDocumentReady2Translate, |
| michael@0 | 88 | false); |
| michael@0 | 89 | } |
| michael@0 | 90 | |
| michael@0 | 91 | // Listen to creation of content documents in order to translate them as soon |
| michael@0 | 92 | // as possible in their loading process |
| michael@0 | 93 | const ON_CONTENT = "document-element-inserted"; |
| michael@0 | 94 | let enabled = false; |
| michael@0 | 95 | function enable() { |
| michael@0 | 96 | if (!enabled) { |
| michael@0 | 97 | events.on(ON_CONTENT, onContentWindow); |
| michael@0 | 98 | enabled = true; |
| michael@0 | 99 | } |
| michael@0 | 100 | } |
| michael@0 | 101 | exports.enable = enable; |
| michael@0 | 102 | |
| michael@0 | 103 | function disable() { |
| michael@0 | 104 | if (enabled) { |
| michael@0 | 105 | events.off(ON_CONTENT, onContentWindow); |
| michael@0 | 106 | enabled = false; |
| michael@0 | 107 | } |
| michael@0 | 108 | } |
| michael@0 | 109 | exports.disable = disable; |
| michael@0 | 110 | |
| michael@0 | 111 | require("sdk/system/unload").when(disable); |
