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867 lines
27 KiB
JavaScript
867 lines
27 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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let Ci = Components.interfaces, Cc = Components.classes, Cu = Components.utils;
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Cu.import("resource://gre/modules/Services.jsm")
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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// Panel ID defined in HomeConfig.java.
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const READING_LIST_PANEL_ID = "20f4549a-64ad-4c32-93e4-1dcef792733b";
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XPCOMUtils.defineLazyGetter(window, "gChromeWin", function ()
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window.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIWebNavigation)
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.QueryInterface(Ci.nsIDocShellTreeItem)
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.rootTreeItem
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.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIDOMWindow)
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.QueryInterface(Ci.nsIDOMChromeWindow));
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function dump(s) {
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Services.console.logStringMessage("AboutReader: " + s);
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}
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let gStrings = Services.strings.createBundle("chrome://browser/locale/aboutReader.properties");
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let AboutReader = function(doc, win) {
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dump("Init()");
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this._docRef = Cu.getWeakReference(doc);
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this._winRef = Cu.getWeakReference(win);
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Services.obs.addObserver(this, "Reader:FaviconReturn", false);
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Services.obs.addObserver(this, "Reader:Add", false);
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Services.obs.addObserver(this, "Reader:Remove", false);
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Services.obs.addObserver(this, "Reader:ListCountReturn", false);
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Services.obs.addObserver(this, "Reader:ListCountUpdated", false);
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Services.obs.addObserver(this, "Reader:ListStatusReturn", false);
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this._article = null;
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dump("Feching toolbar, header and content notes from about:reader");
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this._headerElementRef = Cu.getWeakReference(doc.getElementById("reader-header"));
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this._domainElementRef = Cu.getWeakReference(doc.getElementById("reader-domain"));
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this._titleElementRef = Cu.getWeakReference(doc.getElementById("reader-title"));
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this._creditsElementRef = Cu.getWeakReference(doc.getElementById("reader-credits"));
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this._contentElementRef = Cu.getWeakReference(doc.getElementById("reader-content"));
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this._toolbarElementRef = Cu.getWeakReference(doc.getElementById("reader-toolbar"));
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this._messageElementRef = Cu.getWeakReference(doc.getElementById("reader-message"));
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this._toolbarEnabled = false;
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this._scrollOffset = win.pageYOffset;
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let body = doc.body;
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body.addEventListener("touchstart", this, false);
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body.addEventListener("click", this, false);
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win.addEventListener("unload", this, false);
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win.addEventListener("scroll", this, false);
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win.addEventListener("popstate", this, false);
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win.addEventListener("resize", this, false);
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this._setupAllDropdowns();
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this._setupButton("toggle-button", this._onReaderToggle.bind(this));
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this._setupButton("list-button", this._onList.bind(this));
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this._setupButton("share-button", this._onShare.bind(this));
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let colorSchemeOptions = [
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{ name: gStrings.GetStringFromName("aboutReader.colorSchemeDark"),
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value: "dark"},
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{ name: gStrings.GetStringFromName("aboutReader.colorSchemeLight"),
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value: "light"},
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{ name: gStrings.GetStringFromName("aboutReader.colorSchemeAuto"),
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value: "auto"}
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];
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let colorScheme = Services.prefs.getCharPref("reader.color_scheme");
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this._setupSegmentedButton("color-scheme-buttons", colorSchemeOptions, colorScheme, this._setColorSchemePref.bind(this));
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this._setColorSchemePref(colorScheme);
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let fontTypeSample = gStrings.GetStringFromName("aboutReader.fontTypeSample");
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let fontTypeOptions = [
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{ name: fontTypeSample,
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description: gStrings.GetStringFromName("aboutReader.fontTypeSerif"),
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value: "serif",
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linkClass: "serif" },
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{ name: fontTypeSample,
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description: gStrings.GetStringFromName("aboutReader.fontTypeSansSerif"),
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value: "sans-serif",
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linkClass: "sans-serif"
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},
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];
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let fontType = Services.prefs.getCharPref("reader.font_type");
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this._setupSegmentedButton("font-type-buttons", fontTypeOptions, fontType, this._setFontType.bind(this));
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this._setFontType(fontType);
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let fontSizeSample = gStrings.GetStringFromName("aboutReader.fontSizeSample");
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let fontSizeOptions = [
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{ name: fontSizeSample,
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value: 1,
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linkClass: "font-size1-sample" },
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{ name: fontSizeSample,
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value: 2,
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linkClass: "font-size2-sample" },
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{ name: fontSizeSample,
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value: 3,
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linkClass: "font-size3-sample" },
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{ name: fontSizeSample,
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value: 4,
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linkClass: "font-size4-sample" },
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{ name: fontSizeSample,
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value: 5,
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linkClass: "font-size5-sample" }
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];
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let fontSize = Services.prefs.getIntPref("reader.font_size");
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this._setupSegmentedButton("font-size-buttons", fontSizeOptions, fontSize, this._setFontSize.bind(this));
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this._setFontSize(fontSize);
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dump("Decoding query arguments");
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let queryArgs = this._decodeQueryString(win.location.href);
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// Track status of reader toolbar add/remove toggle button
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this._isReadingListItem = -1;
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this._updateToggleButton();
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// Track status of reader toolbar list button
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this._readingListCount = -1;
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this._updateListButton();
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this._requestReadingListCount();
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let url = queryArgs.url;
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let tabId = queryArgs.tabId;
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if (tabId) {
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dump("Loading from tab with ID: " + tabId + ", URL: " + url);
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this._loadFromTab(tabId, url);
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} else {
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dump("Fetching page with URL: " + url);
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this._loadFromURL(url);
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}
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}
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AboutReader.prototype = {
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_BLOCK_IMAGES_SELECTOR: ".content p > img:only-child, " +
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".content p > a:only-child > img:only-child, " +
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".content .wp-caption img, " +
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".content figure img",
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get _doc() {
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return this._docRef.get();
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},
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get _win() {
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return this._winRef.get();
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},
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get _headerElement() {
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return this._headerElementRef.get();
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},
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get _domainElement() {
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return this._domainElementRef.get();
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},
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get _titleElement() {
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return this._titleElementRef.get();
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},
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get _creditsElement() {
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return this._creditsElementRef.get();
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},
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get _contentElement() {
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return this._contentElementRef.get();
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},
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get _toolbarElement() {
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return this._toolbarElementRef.get();
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},
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get _messageElement() {
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return this._messageElementRef.get();
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},
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observe: function Reader_observe(aMessage, aTopic, aData) {
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switch(aTopic) {
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case "Reader:FaviconReturn": {
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let args = JSON.parse(aData);
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this._loadFavicon(args.url, args.faviconUrl);
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Services.obs.removeObserver(this, "Reader:FaviconReturn");
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break;
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}
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case "Reader:Add": {
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let args = JSON.parse(aData);
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if (args.url == this._article.url) {
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if (this._isReadingListItem != 1) {
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this._isReadingListItem = 1;
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this._updateToggleButton();
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}
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}
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break;
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}
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case "Reader:Remove": {
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if (aData == this._article.url) {
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if (this._isReadingListItem != 0) {
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this._isReadingListItem = 0;
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this._updateToggleButton();
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}
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}
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break;
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}
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case "Reader:ListCountReturn":
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case "Reader:ListCountUpdated": {
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let count = parseInt(aData);
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if (this._readingListCount != count) {
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let isInitialStateChange = (this._readingListCount == -1);
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this._readingListCount = count;
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this._updateListButton();
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// Display the toolbar when all its initial component states are known
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if (isInitialStateChange) {
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this._setToolbarVisibility(true);
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}
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// Initial readinglist count is requested before any page is displayed
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if (this._article) {
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this._requestReadingListStatus();
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}
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}
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break;
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}
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case "Reader:ListStatusReturn": {
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let args = JSON.parse(aData);
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if (args.url == this._article.url) {
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if (this._isReadingListItem != args.inReadingList) {
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let isInitialStateChange = (this._isReadingListItem == -1);
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this._isReadingListItem = args.inReadingList;
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this._updateToggleButton();
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// Display the toolbar when all its initial component states are known
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if (isInitialStateChange) {
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this._setToolbarVisibility(true);
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}
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}
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}
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break;
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}
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}
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},
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handleEvent: function Reader_handleEvent(aEvent) {
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if (!aEvent.isTrusted)
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return;
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switch (aEvent.type) {
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case "touchstart":
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this._scrolled = false;
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break;
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case "click":
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if (!this._scrolled)
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this._toggleToolbarVisibility();
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break;
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case "scroll":
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if (!this._scrolled) {
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let isScrollingUp = this._scrollOffset > aEvent.pageY;
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this._setToolbarVisibility(isScrollingUp);
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this._scrollOffset = aEvent.pageY;
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}
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break;
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case "popstate":
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if (!aEvent.state)
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this._closeAllDropdowns();
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break;
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case "resize":
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this._updateImageMargins();
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break;
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case "devicelight":
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this._handleDeviceLight(aEvent.value);
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break;
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case "unload":
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Services.obs.removeObserver(this, "Reader:Add");
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Services.obs.removeObserver(this, "Reader:Remove");
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Services.obs.removeObserver(this, "Reader:ListCountReturn");
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Services.obs.removeObserver(this, "Reader:ListCountUpdated");
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Services.obs.removeObserver(this, "Reader:ListStatusReturn");
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break;
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}
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},
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_updateToggleButton: function Reader_updateToggleButton() {
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let classes = this._doc.getElementById("toggle-button").classList;
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if (this._isReadingListItem == 1) {
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classes.add("on");
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} else {
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classes.remove("on");
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}
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},
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_updateListButton: function Reader_updateListButton() {
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let classes = this._doc.getElementById("list-button").classList;
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if (this._readingListCount > 0) {
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classes.add("on");
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} else {
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classes.remove("on");
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}
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},
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_requestReadingListCount: function Reader_requestReadingListCount() {
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gChromeWin.sendMessageToJava({ type: "Reader:ListCountRequest" });
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},
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_requestReadingListStatus: function Reader_requestReadingListStatus() {
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gChromeWin.sendMessageToJava({
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type: "Reader:ListStatusRequest",
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url: this._article.url
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});
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},
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_onReaderToggle: function Reader_onToggle() {
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if (!this._article)
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return;
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this._isReadingListItem = (this._isReadingListItem == 1) ? 0 : 1;
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this._updateToggleButton();
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if (this._isReadingListItem == 1) {
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gChromeWin.Reader.storeArticleInCache(this._article, function(success) {
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dump("Reader:Add (in reader) success=" + success);
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let result = (success ? gChromeWin.Reader.READER_ADD_SUCCESS :
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gChromeWin.Reader.READER_ADD_FAILED);
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let json = JSON.stringify({ fromAboutReader: true, url: this._article.url });
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Services.obs.notifyObservers(null, "Reader:Add", json);
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gChromeWin.sendMessageToJava({
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type: "Reader:Added",
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result: result,
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title: this._article.title,
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url: this._article.url,
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length: this._article.length,
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excerpt: this._article.excerpt
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});
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}.bind(this));
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} else {
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// In addition to removing the article from the cache (handled in
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// browser.js), sending this message will cause the toggle button to be
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// updated (handled in this file).
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Services.obs.notifyObservers(null, "Reader:Remove", this._article.url);
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}
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},
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_onList: function Reader_onList() {
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if (!this._article || this._readingListCount < 1)
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return;
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gChromeWin.BrowserApp.loadURI("about:home?page=" + READING_LIST_PANEL_ID);
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},
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_onShare: function Reader_onShare() {
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if (!this._article)
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return;
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gChromeWin.sendMessageToJava({
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type: "Reader:Share",
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url: this._article.url,
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title: this._article.title
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});
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},
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_setFontSize: function Reader_setFontSize(newFontSize) {
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let bodyClasses = this._doc.body.classList;
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if (this._fontSize > 0)
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bodyClasses.remove("font-size" + this._fontSize);
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this._fontSize = newFontSize;
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bodyClasses.add("font-size" + this._fontSize);
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Services.prefs.setIntPref("reader.font_size", this._fontSize);
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},
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_handleDeviceLight: function Reader_handleDeviceLight(newLux) {
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// Desired size of the this._luxValues array.
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let luxValuesSize = 10;
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// Add new lux value at the front of the array.
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this._luxValues.unshift(newLux);
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// Add new lux value to this._totalLux for averaging later.
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this._totalLux += newLux;
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// Don't update when length of array is less than luxValuesSize except when it is 1.
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if (this._luxValues.length < luxValuesSize) {
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// Use the first lux value to set the color scheme until our array equals luxValuesSize.
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if (this._luxValues.length == 1) {
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this._updateColorScheme(newLux);
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}
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return;
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}
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// Holds the average of the lux values collected in this._luxValues.
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let averageLuxValue = this._totalLux/luxValuesSize;
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this._updateColorScheme(averageLuxValue);
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// Pop the oldest value off the array.
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let oldLux = this._luxValues.pop();
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// Subtract oldLux since it has been discarded from the array.
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this._totalLux -= oldLux;
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},
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_updateColorScheme: function Reader_updateColorScheme(luxValue) {
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// Upper bound value for "dark" color scheme beyond which it changes to "light".
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let upperBoundDark = 50;
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// Lower bound value for "light" color scheme beyond which it changes to "dark".
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let lowerBoundLight = 10;
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// Threshold for color scheme change.
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let colorChangeThreshold = 20;
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// Ignore changes that are within a certain threshold of previous lux values.
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if ((this._colorScheme === "dark" && luxValue < upperBoundDark) ||
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(this._colorScheme === "light" && luxValue > lowerBoundLight))
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return;
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if (luxValue < colorChangeThreshold)
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this._setColorScheme("dark");
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else
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this._setColorScheme("light");
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},
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_setColorScheme: function Reader_setColorScheme(newColorScheme) {
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if (this._colorScheme === newColorScheme)
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return;
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let bodyClasses = this._doc.body.classList;
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if (this._colorScheme)
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bodyClasses.remove(this._colorScheme);
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this._colorScheme = newColorScheme;
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bodyClasses.add(this._colorScheme);
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},
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// Pref values include "dark", "light", and "auto", which automatically switches
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// between light and dark color schemes based on the ambient light level.
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_setColorSchemePref: function Reader_setColorSchemePref(colorSchemePref) {
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if (colorSchemePref === "auto") {
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this._win.addEventListener("devicelight", this, false);
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this._luxValues = [];
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this._totalLux = 0;
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} else {
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this._win.removeEventListener("devicelight", this, false);
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this._setColorScheme(colorSchemePref);
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delete this._luxValues;
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delete this._totalLux;
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}
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Services.prefs.setCharPref("reader.color_scheme", colorSchemePref);
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},
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_setFontType: function Reader_setFontType(newFontType) {
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if (this._fontType === newFontType)
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return;
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let bodyClasses = this._doc.body.classList;
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if (this._fontType)
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bodyClasses.remove(this._fontType);
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this._fontType = newFontType;
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bodyClasses.add(this._fontType);
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Services.prefs.setCharPref("reader.font_type", this._fontType);
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},
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_getToolbarVisibility: function Reader_getToolbarVisibility() {
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return !this._toolbarElement.classList.contains("toolbar-hidden");
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},
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_setToolbarVisibility: function Reader_setToolbarVisibility(visible) {
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let win = this._win;
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if (win.history.state)
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win.history.back();
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if (!this._toolbarEnabled)
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return;
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// Don't allow visible toolbar until banner state is known
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if (this._readingListCount == -1 || this._isReadingListItem == -1)
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return;
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if (this._getToolbarVisibility() === visible)
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return;
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this._toolbarElement.classList.toggle("toolbar-hidden");
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this._setSystemUIVisibility(visible);
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if (!visible && !this._hasUsedToolbar) {
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this._hasUsedToolbar = Services.prefs.getBoolPref("reader.has_used_toolbar");
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if (!this._hasUsedToolbar) {
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gChromeWin.NativeWindow.toast.show(gStrings.GetStringFromName("aboutReader.toolbarTip"), "short");
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Services.prefs.setBoolPref("reader.has_used_toolbar", true);
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this._hasUsedToolbar = true;
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}
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}
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},
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_toggleToolbarVisibility: function Reader_toggleToolbarVisibility(visible) {
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this._setToolbarVisibility(!this._getToolbarVisibility());
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},
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_setSystemUIVisibility: function Reader_setSystemUIVisibility(visible) {
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gChromeWin.sendMessageToJava({
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type: "SystemUI:Visibility",
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visible: visible
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});
|
|
},
|
|
|
|
_loadFromURL: function Reader_loadFromURL(url) {
|
|
this._showProgressDelayed();
|
|
|
|
gChromeWin.Reader.parseDocumentFromURL(url, function(article) {
|
|
if (article)
|
|
this._showContent(article);
|
|
else
|
|
this._showError(gStrings.GetStringFromName("aboutReader.loadError"));
|
|
}.bind(this));
|
|
},
|
|
|
|
_loadFromTab: function Reader_loadFromTab(tabId, url) {
|
|
this._showProgressDelayed();
|
|
|
|
gChromeWin.Reader.getArticleForTab(tabId, url, function(article) {
|
|
if (article)
|
|
this._showContent(article);
|
|
else
|
|
this._showError(gStrings.GetStringFromName("aboutReader.loadError"));
|
|
}.bind(this));
|
|
},
|
|
|
|
_requestFavicon: function Reader_requestFavicon() {
|
|
gChromeWin.sendMessageToJava({
|
|
type: "Reader:FaviconRequest",
|
|
url: this._article.url
|
|
});
|
|
},
|
|
|
|
_loadFavicon: function Reader_loadFavicon(url, faviconUrl) {
|
|
if (this._article.url !== url)
|
|
return;
|
|
|
|
let doc = this._doc;
|
|
|
|
let link = doc.createElement('link');
|
|
link.rel = 'shortcut icon';
|
|
link.href = faviconUrl;
|
|
|
|
doc.getElementsByTagName('head')[0].appendChild(link);
|
|
},
|
|
|
|
_updateImageMargins: function Reader_updateImageMargins() {
|
|
let windowWidth = this._win.innerWidth;
|
|
let contentWidth = this._contentElement.offsetWidth;
|
|
let maxWidthStyle = windowWidth + "px !important";
|
|
|
|
let setImageMargins = function(img) {
|
|
if (!img._originalWidth)
|
|
img._originalWidth = img.offsetWidth;
|
|
|
|
let imgWidth = img._originalWidth;
|
|
|
|
// If the image is taking more than half of the screen, just make
|
|
// it fill edge-to-edge.
|
|
if (imgWidth < contentWidth && imgWidth > windowWidth * 0.55)
|
|
imgWidth = windowWidth;
|
|
|
|
let sideMargin = Math.max((contentWidth - windowWidth) / 2,
|
|
(contentWidth - imgWidth) / 2);
|
|
|
|
let imageStyle = sideMargin + "px !important";
|
|
let widthStyle = imgWidth + "px !important";
|
|
|
|
let cssText = "max-width: " + maxWidthStyle + ";" +
|
|
"width: " + widthStyle + ";" +
|
|
"margin-left: " + imageStyle + ";" +
|
|
"margin-right: " + imageStyle + ";";
|
|
|
|
img.style.cssText = cssText;
|
|
}
|
|
|
|
let imgs = this._doc.querySelectorAll(this._BLOCK_IMAGES_SELECTOR);
|
|
for (let i = imgs.length; --i >= 0;) {
|
|
let img = imgs[i];
|
|
|
|
if (img.width > 0) {
|
|
setImageMargins(img);
|
|
} else {
|
|
img.onload = function() {
|
|
setImageMargins(img);
|
|
}
|
|
}
|
|
}
|
|
},
|
|
|
|
_maybeSetTextDirection: function Read_maybeSetTextDirection(article){
|
|
if(!article.dir)
|
|
return;
|
|
|
|
//Set "dir" attribute on content
|
|
this._contentElement.setAttribute("dir", article.dir);
|
|
this._headerElement.setAttribute("dir", article.dir);
|
|
},
|
|
|
|
_showError: function Reader_showError(error) {
|
|
this._headerElement.style.display = "none";
|
|
this._contentElement.style.display = "none";
|
|
|
|
this._messageElement.innerHTML = error;
|
|
this._messageElement.style.display = "block";
|
|
|
|
this._doc.title = error;
|
|
},
|
|
|
|
// This function is the JS version of Java's StringUtils.stripCommonSubdomains.
|
|
_stripHost: function Reader_stripHost(host) {
|
|
if (!host)
|
|
return host;
|
|
|
|
let start = 0;
|
|
|
|
if (host.startsWith("www."))
|
|
start = 4;
|
|
else if (host.startsWith("m."))
|
|
start = 2;
|
|
else if (host.startsWith("mobile."))
|
|
start = 7;
|
|
|
|
return host.substring(start);
|
|
},
|
|
|
|
_showContent: function Reader_showContent(article) {
|
|
this._messageElement.style.display = "none";
|
|
|
|
this._article = article;
|
|
|
|
this._domainElement.href = article.url;
|
|
let articleUri = Services.io.newURI(article.url, null, null);
|
|
this._domainElement.innerHTML = this._stripHost(articleUri.host);
|
|
|
|
this._creditsElement.innerHTML = article.byline;
|
|
|
|
this._titleElement.textContent = article.title;
|
|
this._doc.title = article.title;
|
|
|
|
this._headerElement.style.display = "block";
|
|
|
|
let parserUtils = Cc["@mozilla.org/parserutils;1"].getService(Ci.nsIParserUtils);
|
|
let contentFragment = parserUtils.parseFragment(article.content, Ci.nsIParserUtils.SanitizerDropForms,
|
|
false, articleUri, this._contentElement);
|
|
this._contentElement.innerHTML = "";
|
|
this._contentElement.appendChild(contentFragment);
|
|
this._updateImageMargins();
|
|
this._maybeSetTextDirection(article);
|
|
|
|
this._contentElement.style.display = "block";
|
|
this._requestReadingListStatus();
|
|
|
|
this._toolbarEnabled = true;
|
|
this._setToolbarVisibility(true);
|
|
|
|
this._requestFavicon();
|
|
},
|
|
|
|
_hideContent: function Reader_hideContent() {
|
|
this._headerElement.style.display = "none";
|
|
this._contentElement.style.display = "none";
|
|
},
|
|
|
|
_showProgressDelayed: function Reader_showProgressDelayed() {
|
|
this._win.setTimeout(function() {
|
|
// Article has already been loaded, no need to show
|
|
// progress anymore.
|
|
if (this._article)
|
|
return;
|
|
|
|
this._headerElement.style.display = "none";
|
|
this._contentElement.style.display = "none";
|
|
|
|
this._messageElement.innerHTML = gStrings.GetStringFromName("aboutReader.loading");
|
|
this._messageElement.style.display = "block";
|
|
}.bind(this), 300);
|
|
},
|
|
|
|
_decodeQueryString: function Reader_decodeQueryString(url) {
|
|
let result = {};
|
|
let query = url.split("?")[1];
|
|
if (query) {
|
|
let pairs = query.split("&");
|
|
for (let i = 0; i < pairs.length; i++) {
|
|
let [name, value] = pairs[i].split("=");
|
|
result[name] = decodeURIComponent(value);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
},
|
|
|
|
_setupSegmentedButton: function Reader_setupSegmentedButton(id, options, initialValue, callback) {
|
|
let doc = this._doc;
|
|
let segmentedButton = doc.getElementById(id);
|
|
|
|
for (let i = 0; i < options.length; i++) {
|
|
let option = options[i];
|
|
|
|
let item = doc.createElement("li");
|
|
let link = doc.createElement("a");
|
|
link.textContent = option.name;
|
|
item.appendChild(link);
|
|
|
|
if (option.linkClass !== undefined)
|
|
link.classList.add(option.linkClass);
|
|
|
|
if (option.description !== undefined) {
|
|
let description = doc.createElement("div");
|
|
description.textContent = option.description;
|
|
item.appendChild(description);
|
|
}
|
|
|
|
link.style.MozUserSelect = 'none';
|
|
segmentedButton.appendChild(item);
|
|
|
|
link.addEventListener("click", function(aEvent) {
|
|
if (!aEvent.isTrusted)
|
|
return;
|
|
|
|
aEvent.stopPropagation();
|
|
|
|
let items = segmentedButton.children;
|
|
for (let j = items.length - 1; j >= 0; j--) {
|
|
items[j].classList.remove("selected");
|
|
}
|
|
|
|
item.classList.add("selected");
|
|
callback(option.value);
|
|
}.bind(this), true);
|
|
|
|
if (option.value === initialValue)
|
|
item.classList.add("selected");
|
|
}
|
|
},
|
|
|
|
_setupButton: function Reader_setupButton(id, callback) {
|
|
let button = this._doc.getElementById(id);
|
|
|
|
button.addEventListener("click", function(aEvent) {
|
|
if (!aEvent.isTrusted)
|
|
return;
|
|
|
|
aEvent.stopPropagation();
|
|
callback();
|
|
}, true);
|
|
},
|
|
|
|
_setupAllDropdowns: function Reader_setupAllDropdowns() {
|
|
let doc = this._doc;
|
|
let win = this._win;
|
|
|
|
let dropdowns = doc.getElementsByClassName("dropdown");
|
|
|
|
for (let i = dropdowns.length - 1; i >= 0; i--) {
|
|
let dropdown = dropdowns[i];
|
|
|
|
let dropdownToggle = dropdown.getElementsByClassName("dropdown-toggle")[0];
|
|
let dropdownPopup = dropdown.getElementsByClassName("dropdown-popup")[0];
|
|
|
|
if (!dropdownToggle || !dropdownPopup)
|
|
continue;
|
|
|
|
let dropdownArrow = doc.createElement("div");
|
|
dropdownArrow.className = "dropdown-arrow";
|
|
dropdownPopup.appendChild(dropdownArrow);
|
|
|
|
let updatePopupPosition = function() {
|
|
let popupWidth = dropdownPopup.offsetWidth + 30;
|
|
let arrowWidth = dropdownArrow.offsetWidth;
|
|
let toggleWidth = dropdownToggle.offsetWidth;
|
|
let toggleLeft = dropdownToggle.offsetLeft;
|
|
|
|
let popupShift = (toggleWidth - popupWidth) / 2;
|
|
let popupLeft = Math.max(0, Math.min(win.innerWidth - popupWidth, toggleLeft + popupShift));
|
|
dropdownPopup.style.left = popupLeft + "px";
|
|
|
|
let arrowShift = (toggleWidth - arrowWidth) / 2;
|
|
let arrowLeft = toggleLeft - popupLeft + arrowShift;
|
|
dropdownArrow.style.left = arrowLeft + "px";
|
|
};
|
|
|
|
win.addEventListener("resize", function(aEvent) {
|
|
if (!aEvent.isTrusted)
|
|
return;
|
|
|
|
// Wait for reflow before calculating the new position of the popup.
|
|
setTimeout(updatePopupPosition, 0);
|
|
}, true);
|
|
|
|
dropdownToggle.addEventListener("click", function(aEvent) {
|
|
if (!aEvent.isTrusted)
|
|
return;
|
|
|
|
aEvent.stopPropagation();
|
|
|
|
if (!this._getToolbarVisibility())
|
|
return;
|
|
|
|
let dropdownClasses = dropdown.classList;
|
|
|
|
if (dropdownClasses.contains("open")) {
|
|
win.history.back();
|
|
} else {
|
|
updatePopupPosition();
|
|
if (!this._closeAllDropdowns())
|
|
this._pushDropdownState();
|
|
|
|
dropdownClasses.add("open");
|
|
}
|
|
}.bind(this), true);
|
|
}
|
|
},
|
|
|
|
_pushDropdownState: function Reader_pushDropdownState() {
|
|
// FIXME: We're getting a NS_ERROR_UNEXPECTED error when we try
|
|
// to do win.history.pushState() here (see bug 682296). This is
|
|
// a workaround that allows us to push history state on the target
|
|
// content document.
|
|
|
|
let doc = this._doc;
|
|
let body = doc.body;
|
|
|
|
if (this._pushStateScript)
|
|
body.removeChild(this._pushStateScript);
|
|
|
|
this._pushStateScript = doc.createElement('script');
|
|
this._pushStateScript.type = "text/javascript";
|
|
this._pushStateScript.innerHTML = 'history.pushState({ dropdown: 1 }, document.title);';
|
|
|
|
body.appendChild(this._pushStateScript);
|
|
},
|
|
|
|
_closeAllDropdowns : function Reader_closeAllDropdowns() {
|
|
let dropdowns = this._doc.querySelectorAll(".dropdown.open");
|
|
for (let i = dropdowns.length - 1; i >= 0; i--) {
|
|
dropdowns[i].classList.remove("open");
|
|
}
|
|
|
|
return (dropdowns.length > 0)
|
|
}
|
|
};
|