зеркало из https://github.com/mozilla/gecko-dev.git
677 строки
20 KiB
JavaScript
677 строки
20 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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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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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("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.colorSchemeLight"),
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value: "light"},
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{ name: gStrings.GetStringFromName("aboutReader.colorSchemeDark"),
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value: "dark"}
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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._setColorScheme.bind(this));
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this._setColorScheme(colorScheme);
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let fontTitle = gStrings.GetStringFromName("aboutReader.textTitle");
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this._setupStepControl("font-size-control", fontTitle, this._onFontSizeChange.bind(this));
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this._fontSize = 0;
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this._setFontSize(Services.prefs.getIntPref("reader.font_size"));
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let marginTitle = gStrings.GetStringFromName("aboutReader.marginTitle");
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this._setupStepControl("margin-size-control", marginTitle, this._onMarginSizeChange.bind(this));
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this._marginSize = 0;
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this._setMarginSize(Services.prefs.getIntPref("reader.margin_size"));
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dump("Decoding query arguments");
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let queryArgs = this._decodeQueryString(win.location.href);
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this._isReadingListItem = (queryArgs.readingList == "1");
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this._updateToggleButton();
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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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_STEP_INCREMENT: 0,
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_STEP_DECREMENT: 1,
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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 info = JSON.parse(aData);
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this._loadFavicon(info.url, info.faviconUrl);
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Services.obs.removeObserver(this, "Reader:FaviconReturn", false);
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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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this._scrolled = true;
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this._setToolbarVisibility(false);
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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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}
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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) {
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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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_onReaderToggle: function Reader_onToggle() {
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if (!this._article)
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return;
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this._isReadingListItem = !this._isReadingListItem;
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this._updateToggleButton();
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if (this._isReadingListItem) {
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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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gChromeWin.sendMessageToJava({
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type: "Reader:Added",
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success: success,
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title: this._article.title,
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url: this._article.url,
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});
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}.bind(this));
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} else {
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gChromeWin.Reader.removeArticleFromCache(this._article.url , function(success) {
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dump("Reader:Remove (in reader) success=" + success);
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gChromeWin.sendMessageToJava({
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type: "Reader:Removed",
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url: this._article.url
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});
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}.bind(this));
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}
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},
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_onList: function Reader_onList() {
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if (!this._article)
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return;
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gChromeWin.sendMessageToJava({ type: "Reader:GoToReadingList" });
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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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_onMarginSizeChange: function Reader_onMarginSizeChange(operation) {
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if (operation == this._STEP_INCREMENT)
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this._setMarginSize(this._marginSize + 5);
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else
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this._setMarginSize(this._marginSize - 5);
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},
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_setMarginSize: function Reader_setMarginSize(newMarginSize) {
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if (this._marginSize === newMarginSize)
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return;
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let doc = this._doc;
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this._marginSize = Math.max(5, Math.min(25, newMarginSize));
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doc.body.style.marginLeft = this._marginSize + "%";
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doc.body.style.marginRight = this._marginSize + "%";
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this._updateImageMargins();
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Services.prefs.setIntPref("reader.margin_size", this._marginSize);
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},
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_onFontSizeChange: function Reader_onFontSizeChange(operation) {
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if (operation == this._STEP_INCREMENT)
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this._setFontSize(this._fontSize + 1);
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else
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this._setFontSize(this._fontSize - 1);
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},
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_setFontSize: function Reader_setFontSize(newFontSize) {
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if (this._fontSize === newFontSize)
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return;
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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 = Math.max(1, Math.min(7, 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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_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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Services.prefs.setCharPref("reader.color_scheme", this._colorScheme);
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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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if (this._getToolbarVisibility() === visible)
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return;
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this._toolbarElement.classList.toggle("toolbar-hidden");
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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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_loadFromURL: function Reader_loadFromURL(url) {
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this._showProgressDelayed();
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gChromeWin.Reader.parseDocumentFromURL(url, function(article) {
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if (article)
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this._showContent(article);
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else
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this._showError(gStrings.GetStringFromName("aboutReader.loadError"));
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}.bind(this));
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},
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_loadFromTab: function Reader_loadFromTab(tabId, url) {
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this._showProgressDelayed();
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gChromeWin.Reader.getArticleForTab(tabId, url, function(article) {
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if (article)
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this._showContent(article);
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else
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this._showError(gStrings.GetStringFromName("aboutReader.loadError"));
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}.bind(this));
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},
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_requestFavicon: function Reader_requestFavicon() {
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gChromeWin.sendMessageToJava({
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type: "Reader:FaviconRequest",
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url: this._article.url
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});
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},
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_loadFavicon: function Reader_loadFavicon(url, faviconUrl) {
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if (this._article.url !== url)
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return;
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let doc = this._doc;
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let link = doc.createElement('link');
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link.rel = 'shortcut icon';
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link.href = faviconUrl;
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doc.getElementsByTagName('head')[0].appendChild(link);
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},
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_updateImageMargins: function Reader_updateImageMargins() {
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let windowWidth = this._win.innerWidth;
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let contentWidth = this._contentElement.offsetWidth;
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let maxWidthStyle = windowWidth + "px !important";
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let setImageMargins = function(img) {
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if (!img._originalWidth)
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img._originalWidth = img.offsetWidth;
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let imgWidth = img._originalWidth;
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// If the image is taking more than half of the screen, just make
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// it fill edge-to-edge.
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if (imgWidth < contentWidth && imgWidth > windowWidth * 0.55)
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imgWidth = windowWidth;
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let sideMargin = Math.max((contentWidth - windowWidth) / 2,
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(contentWidth - imgWidth) / 2);
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let imageStyle = sideMargin + "px !important";
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let widthStyle = imgWidth + "px !important";
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let cssText = "max-width: " + maxWidthStyle + ";" +
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"width: " + widthStyle + ";" +
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"margin-left: " + imageStyle + ";" +
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"margin-right: " + imageStyle + ";";
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img.style.cssText = cssText;
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}
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let imgs = this._doc.querySelectorAll(this._BLOCK_IMAGES_SELECTOR);
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for (let i = imgs.length; --i >= 0;) {
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let img = imgs[i];
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if (img.width > 0) {
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setImageMargins(img);
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} else {
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img.onload = function() {
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setImageMargins(img);
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}
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}
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}
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},
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_maybeSetTextDirection: function Read_maybeSetTextDirection(article){
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if(!article.dir)
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return;
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//Set "dir" attribute on content
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this._contentElement.setAttribute("dir", article.dir);
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this._headerElement.setAttribute("dir", article.dir);
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},
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_showError: function Reader_showError(error) {
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this._headerElement.style.display = "none";
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this._contentElement.style.display = "none";
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this._messageElement.innerHTML = error;
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this._messageElement.style.display = "block";
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this._doc.title = error;
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},
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_showContent: function Reader_showContent(article) {
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this._messageElement.style.display = "none";
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this._article = article;
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let articleUri = Services.io.newURI(article.url, null, null);
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let domain = articleUri.host;
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this._domainElement.innerHTML = domain;
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this._creditsElement.innerHTML = article.byline;
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this._titleElement.textContent = article.title;
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this._doc.title = article.title;
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this._headerElement.style.display = "block";
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let parserUtils = Cc["@mozilla.org/parserutils;1"].getService(Ci.nsIParserUtils);
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let contentFragment = parserUtils.parseFragment(article.content, Ci.nsIParserUtils.SanitizerDropForms,
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false, articleUri, this._contentElement);
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this._contentElement.innerHTML = "";
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this._contentElement.appendChild(contentFragment);
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this._updateImageMargins();
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this._maybeSetTextDirection(article);
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this._contentElement.style.display = "block";
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this._toolbarEnabled = true;
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this._setToolbarVisibility(true);
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this._requestFavicon();
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},
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_hideContent: function Reader_hideContent() {
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this._headerElement.style.display = "none";
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this._contentElement.style.display = "none";
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},
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_showProgressDelayed: function Reader_showProgressDelayed() {
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this._win.setTimeout(function() {
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// Article has already been loaded, no need to show
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// progress anymore.
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if (this._article)
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return;
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this._headerElement.style.display = "none";
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this._contentElement.style.display = "none";
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this._messageElement.innerHTML = gStrings.GetStringFromName("aboutReader.loading");
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this._messageElement.style.display = "block";
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}.bind(this), 300);
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},
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_decodeQueryString: function Reader_decodeQueryString(url) {
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let result = {};
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let query = url.split("?")[1];
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if (query) {
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let pairs = query.split("&");
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for (let i = 0; i < pairs.length; i++) {
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let [name, value] = pairs[i].split("=");
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result[name] = decodeURIComponent(value);
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}
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}
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return result;
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},
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_setupStepControl: function Reader_setupStepControl(id, name, callback) {
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let doc = this._doc;
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let stepControl = doc.getElementById(id);
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let title = this._doc.createElement("h1");
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title.innerHTML = name;
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stepControl.appendChild(title);
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let plusButton = doc.createElement("div");
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plusButton.className = "button plus-button";
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stepControl.appendChild(plusButton);
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let minusButton = doc.createElement("div");
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minusButton.className = "button minus-button";
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stepControl.appendChild(minusButton);
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plusButton.addEventListener("click", function(aEvent) {
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if (!aEvent.isTrusted)
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return;
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aEvent.stopPropagation();
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callback(this._STEP_INCREMENT);
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}.bind(this), true);
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minusButton.addEventListener("click", function(aEvent) {
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if (!aEvent.isTrusted)
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return;
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aEvent.stopPropagation();
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callback(this._STEP_DECREMENT);
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}.bind(this), true);
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},
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_setupSegmentedButton: function Reader_setupSegmentedButton(id, options, initialValue, callback) {
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let doc = this._doc;
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let segmentedButton = doc.getElementById(id);
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for (let i = 0; i < options.length; i++) {
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let option = options[i];
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|
let item = doc.createElement("li");
|
|
let link = doc.createElement("a");
|
|
link.innerHTML = option.name;
|
|
item.appendChild(link);
|
|
|
|
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;
|
|
|
|
updatePopupPosition();
|
|
}, 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)
|
|
}
|
|
};
|