import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

browser/modules/ReaderParent.jsm

@@ -0,0 +1,186 @@
+// -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
+/* 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";
+
+const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
+
+this.EXPORTED_SYMBOLS = [ "ReaderParent" ];
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/Task.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "PlacesUtils", "resource://gre/modules/PlacesUtils.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "ReaderMode", "resource://gre/modules/ReaderMode.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "UITour", "resource:///modules/UITour.jsm");
+
+const gStringBundle = Services.strings.createBundle("chrome://global/locale/aboutReader.properties");
+
+var ReaderParent = {
+  _readerModeInfoPanelOpen: false,
+
+  MESSAGES: [
+    "Reader:ArticleGet",
+    "Reader:FaviconRequest",
+    "Reader:UpdateReaderButton",
+  ],
+
+  init: function() {
+    let mm = Cc["@mozilla.org/globalmessagemanager;1"].getService(Ci.nsIMessageListenerManager);
+    for (let msg of this.MESSAGES) {
+      mm.addMessageListener(msg, this);
+    }
+  },
+
+  receiveMessage: function(message) {
+    switch (message.name) {
+      case "Reader:ArticleGet":
+        this._getArticle(message.data.url, message.target).then((article) => {
+          // Make sure the target browser is still alive before trying to send data back.
+          if (message.target.messageManager) {
+            message.target.messageManager.sendAsyncMessage("Reader:ArticleData", { article: article });
+          }
+        }, e => {
+          if (e && e.newURL) {
+            // Make sure the target browser is still alive before trying to send data back.
+            if (message.target.messageManager) {
+              message.target.messageManager.sendAsyncMessage("Reader:ArticleData", { newURL: e.newURL });
+            }
+          }
+        });
+        break;
+
+      case "Reader:FaviconRequest": {
+        if (message.target.messageManager) {
+          let faviconUrl = PlacesUtils.promiseFaviconLinkUrl(message.data.url);
+          faviconUrl.then(function onResolution(favicon) {
+            message.target.messageManager.sendAsyncMessage("Reader:FaviconReturn", {
+              url: message.data.url,
+              faviconUrl: favicon.path.replace(/^favicon:/, "")
+            })
+          },
+          function onRejection(reason) {
+            Cu.reportError("Error requesting favicon URL for about:reader content: " + reason);
+          }).catch(Cu.reportError);
+        }
+        break;
+      }
+
+      case "Reader:UpdateReaderButton": {
+        let browser = message.target;
+        if (message.data && message.data.isArticle !== undefined) {
+          browser.isArticle = message.data.isArticle;
+        }
+        this.updateReaderButton(browser);
+        break;
+      }
+    }
+  },
+
+  updateReaderButton: function(browser) {
+    let win = browser.ownerGlobal;
+    if (browser != win.gBrowser.selectedBrowser) {
+      return;
+    }
+
+    let button = win.document.getElementById("reader-mode-button");
+    let command = win.document.getElementById("View:ReaderView");
+    let key = win.document.getElementById("toggleReaderMode");
+    if (browser.currentURI.spec.startsWith("about:reader")) {
+      button.setAttribute("readeractive", true);
+      button.hidden = false;
+      let closeText = gStringBundle.GetStringFromName("readerView.close");
+      button.setAttribute("tooltiptext", closeText);
+      command.setAttribute("label", closeText);
+      command.setAttribute("hidden", false);
+      command.setAttribute("accesskey", gStringBundle.GetStringFromName("readerView.close.accesskey"));
+      key.setAttribute("disabled", false);
+    } else {
+      button.removeAttribute("readeractive");
+      button.hidden = !browser.isArticle;
+      let enterText = gStringBundle.GetStringFromName("readerView.enter");
+      button.setAttribute("tooltiptext", enterText);
+      command.setAttribute("label", enterText);
+      command.setAttribute("hidden", !browser.isArticle);
+      command.setAttribute("accesskey", gStringBundle.GetStringFromName("readerView.enter.accesskey"));
+      key.setAttribute("disabled", !browser.isArticle);
+    }
+
+    let currentUriHost = browser.currentURI && browser.currentURI.asciiHost;
+    if (browser.isArticle &&
+        !Services.prefs.getBoolPref("browser.reader.detectedFirstArticle") &&
+        currentUriHost && !currentUriHost.endsWith("mozilla.org")) {
+      this.showReaderModeInfoPanel(browser);
+      Services.prefs.setBoolPref("browser.reader.detectedFirstArticle", true);
+      this._readerModeInfoPanelOpen = true;
+    } else if (this._readerModeInfoPanelOpen) {
+      if (UITour.isInfoOnTarget(win, "readerMode-urlBar")) {
+        UITour.hideInfo(win);
+      }
+      this._readerModeInfoPanelOpen = false;
+    }
+  },
+
+  forceShowReaderIcon: function(browser) {
+    browser.isArticle = true;
+    this.updateReaderButton(browser);
+  },
+
+  buttonClick(event) {
+    if (event.button != 0) {
+      return;
+    }
+    this.toggleReaderMode(event);
+  },
+
+  toggleReaderMode: function(event) {
+    let win = event.target.ownerGlobal;
+    let browser = win.gBrowser.selectedBrowser;
+    browser.messageManager.sendAsyncMessage("Reader:ToggleReaderMode");
+  },
+
+  /**
+   * Shows an info panel from the UITour for Reader Mode.
+   *
+   * @param browser The <browser> that the tour should be started for.
+   */
+  showReaderModeInfoPanel(browser) {
+    let win = browser.ownerGlobal;
+    let targetPromise = UITour.getTarget(win, "readerMode-urlBar");
+    targetPromise.then(target => {
+      let browserBundle = Services.strings.createBundle("chrome://browser/locale/browser.properties");
+      let icon = "chrome://browser/skin/";
+      if (win.devicePixelRatio > 1) {
+        icon += "reader-tour@2x.png";
+      } else {
+        icon += "reader-tour.png";
+      }
+      UITour.showInfo(win, target,
+                      browserBundle.GetStringFromName("readingList.promo.firstUse.readerView.title"),
+                      browserBundle.GetStringFromName("readingList.promo.firstUse.readerView.body"),
+                      icon);
+    });
+  },
+
+  /**
+   * Gets an article for a given URL. This method will download and parse a document.
+   *
+   * @param url The article URL.
+   * @param browser The browser where the article is currently loaded.
+   * @return {Promise}
+   * @resolves JS object representing the article, or null if no article is found.
+   */
+  _getArticle: Task.async(function* (url, browser) {
+    return yield ReaderMode.downloadAndParseDocument(url).catch(e => {
+      if (e && e.newURL) {
+        // Pass up the error so we can navigate the browser in question to the new URL:
+        throw e;
+      }
+      Cu.reportError("Error downloading and parsing document: " + e);
+      return null;
+    });
+  })
+};