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author | Matt A. Tobin <email@mattatobin.com> | 2018-02-09 06:46:43 -0500 |
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committer | Matt A. Tobin <email@mattatobin.com> | 2018-02-09 06:46:43 -0500 |
commit | ac46df8daea09899ce30dc8fd70986e258c746bf (patch) | |
tree | 2750d3125fc253fd5b0671e4bd268eff1fd97296 /toolkit/jetpack/sdk/content/l10n-html.js | |
parent | 8cecf8d5208f3945b35f879bba3015bb1a11bec6 (diff) | |
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Move Add-on SDK source to toolkit/jetpack
Diffstat (limited to 'toolkit/jetpack/sdk/content/l10n-html.js')
-rw-r--r-- | toolkit/jetpack/sdk/content/l10n-html.js | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/toolkit/jetpack/sdk/content/l10n-html.js b/toolkit/jetpack/sdk/content/l10n-html.js new file mode 100644 index 000000000..f324623dc --- /dev/null +++ b/toolkit/jetpack/sdk/content/l10n-html.js @@ -0,0 +1,133 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ +"use strict"; + +module.metadata = { + "stability": "unstable" +}; + +const { Ci, Cc, Cu } = require("chrome"); +const core = require("../l10n/core"); +const { loadSheet, removeSheet } = require("../stylesheet/utils"); +const { process, frames } = require("../remote/child"); +var observerService = Cc["@mozilla.org/observer-service;1"] + .getService(Ci.nsIObserverService); +const { ShimWaiver } = Cu.import("resource://gre/modules/ShimWaiver.jsm"); +const addObserver = ShimWaiver.getProperty(observerService, "addObserver"); +const removeObserver = ShimWaiver.getProperty(observerService, "removeObserver"); + +const assetsURI = require('../self').data.url(); + +const hideSheetUri = "data:text/css,:root {visibility: hidden !important;}"; + +function translateElementAttributes(element) { + // Translateable attributes + const attrList = ['title', 'accesskey', 'alt', 'label', 'placeholder']; + const ariaAttrMap = { + 'ariaLabel': 'aria-label', + 'ariaValueText': 'aria-valuetext', + 'ariaMozHint': 'aria-moz-hint' + }; + const attrSeparator = '.'; + + // Try to translate each of the attributes + for (let attribute of attrList) { + const data = core.get(element.dataset.l10nId + attrSeparator + attribute); + if (data) + element.setAttribute(attribute, data); + } + + // Look for the aria attribute translations that match fxOS's aliases + for (let attrAlias in ariaAttrMap) { + const data = core.get(element.dataset.l10nId + attrSeparator + attrAlias); + if (data) + element.setAttribute(ariaAttrMap[attrAlias], data); + } +} + +// Taken from Gaia: +// https://github.com/andreasgal/gaia/blob/04fde2640a7f40314643016a5a6c98bf3755f5fd/webapi.js#L1470 +function translateElement(element) { + element = element || document; + + // check all translatable children (= w/ a `data-l10n-id' attribute) + var children = element.querySelectorAll('*[data-l10n-id]'); + var elementCount = children.length; + for (var i = 0; i < elementCount; i++) { + var child = children[i]; + + // translate the child + var key = child.dataset.l10nId; + var data = core.get(key); + if (data) + child.textContent = data; + + translateElementAttributes(child); + } +} +exports.translateElement = translateElement; + +function onDocumentReady2Translate(event) { + let document = event.target; + document.removeEventListener("DOMContentLoaded", onDocumentReady2Translate, + false); + + translateElement(document); + + try { + // Finally display document when we finished replacing all text content + if (document.defaultView) + removeSheet(document.defaultView, hideSheetUri, 'user'); + } + catch(e) { + console.exception(e); + } +} + +function onContentWindow(document) { + // Accept only HTML documents + if (!(document instanceof Ci.nsIDOMHTMLDocument)) + return; + + // Bug 769483: data:URI documents instanciated with nsIDOMParser + // have a null `location` attribute at this time + if (!document.location) + return; + + // Accept only document from this addon + if (document.location.href.indexOf(assetsURI) !== 0) + return; + + try { + // First hide content of the document in order to have content blinking + // between untranslated and translated states + loadSheet(document.defaultView, hideSheetUri, 'user'); + } + catch(e) { + console.exception(e); + } + // Wait for DOM tree to be built before applying localization + document.addEventListener("DOMContentLoaded", onDocumentReady2Translate, + false); +} + +// Listen to creation of content documents in order to translate them as soon +// as possible in their loading process +const ON_CONTENT = "document-element-inserted"; +let enabled = false; +function enable() { + if (enabled) + return; + addObserver(onContentWindow, ON_CONTENT, false); + enabled = true; +} +process.port.on("sdk/l10n/html/enable", enable); + +function disable() { + if (!enabled) + return; + removeObserver(onContentWindow, ON_CONTENT); + enabled = false; +} +process.port.on("sdk/l10n/html/disable", disable); |