1 files changed, 159 insertions, 0 deletions
diff --git a/mobile/android/chrome/content/content.js b/mobile/android/chrome/content/content.js
new file mode 100644
index 000000000..7cac22bd1
--- /dev/null
+++ b/mobile/android/chrome/content/content.js
@@ -0,0 +1,159 @@
+/* -*- 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/. */
+
+var { classes: Cc, interfaces: Ci, utils: Cu } = Components;
+
+Cu.import("resource://gre/modules/ExtensionContent.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "AboutReader", "resource://gre/modules/AboutReader.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "ReaderMode", "resource://gre/modules/ReaderMode.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "LoginManagerContent", "resource://gre/modules/LoginManagerContent.jsm");
+
+var dump = Cu.import("resource://gre/modules/AndroidLog.jsm", {}).AndroidLog.d.bind(null, "Content");
+
+var global = this;
+
+// This is copied from desktop's tab-content.js. See bug 1153485 about sharing this code somehow.
+var AboutReaderListener = {
+
+  _articlePromise: null,
+
+  _isLeavingReaderMode: false,
+
+  init: function() {
+    addEventListener("AboutReaderContentLoaded", this, false, true);
+    addEventListener("DOMContentLoaded", this, false);
+    addEventListener("pageshow", this, false);
+    addEventListener("pagehide", this, false);
+    addMessageListener("Reader:ToggleReaderMode", this);
+    addMessageListener("Reader:PushState", this);
+  },
+
+  receiveMessage: function(message) {
+    switch (message.name) {
+      case "Reader:ToggleReaderMode":
+        let url = content.document.location.href;
+        if (!this.isAboutReader) {
+          this._articlePromise = ReaderMode.parseDocument(content.document).catch(Cu.reportError);
+          ReaderMode.enterReaderMode(docShell, content);
+        } else {
+          this._isLeavingReaderMode = true;
+          ReaderMode.leaveReaderMode(docShell, content);
+        }
+        break;
+
+      case "Reader:PushState":
+        this.updateReaderButton(!!(message.data && message.data.isArticle));
+        break;
+    }
+  },
+
+  get isAboutReader() {
+    return content.document.documentURI.startsWith("about:reader");
+  },
+
+  handleEvent: function(aEvent) {
+    if (aEvent.originalTarget.defaultView != content) {
+      return;
+    }
+
+    switch (aEvent.type) {
+      case "AboutReaderContentLoaded":
+        if (!this.isAboutReader) {
+          return;
+        }
+
+        // If we are restoring multiple reader mode tabs during session restore, duplicate "DOMContentLoaded"
+        // events may be fired for the visible tab. The inital "DOMContentLoaded" may be received before the
+        // document body is available, so we avoid instantiating an AboutReader object, expecting that a
+        // valid message will follow. See bug 925983.
+        if (content.document.body) {
+          new AboutReader(global, content, this._articlePromise);
+          this._articlePromise = null;
+        }
+        break;
+
+      case "pagehide":
+        // this._isLeavingReaderMode is used here to keep the Reader Mode icon
+        // visible in the location bar when transitioning from reader-mode page
+        // back to the source page.
+        sendAsyncMessage("Reader:UpdateReaderButton", { isArticle: this._isLeavingReaderMode });
+        if (this._isLeavingReaderMode) {
+          this._isLeavingReaderMode = false;
+        }
+        break;
+
+      case "pageshow":
+        // If a page is loaded from the bfcache, we won't get a "DOMContentLoaded"
+        // event, so we need to rely on "pageshow" in this case.
+        if (aEvent.persisted) {
+          this.updateReaderButton();
+        }
+        break;
+      case "DOMContentLoaded":
+        this.updateReaderButton();
+        break;
+    }
+  },
+  updateReaderButton: function(forceNonArticle) {
+    if (!ReaderMode.isEnabledForParseOnLoad || this.isAboutReader ||
+        !(content.document instanceof content.HTMLDocument) ||
+        content.document.mozSyntheticDocument) {
+      return;
+    }
+
+    this.scheduleReadabilityCheckPostPaint(forceNonArticle);
+  },
+
+  cancelPotentialPendingReadabilityCheck: function() {
+    if (this._pendingReadabilityCheck) {
+      removeEventListener("MozAfterPaint", this._pendingReadabilityCheck);
+      delete this._pendingReadabilityCheck;
+    }
+  },
+
+  scheduleReadabilityCheckPostPaint: function(forceNonArticle) {
+    if (this._pendingReadabilityCheck) {
+      // We need to stop this check before we re-add one because we don't know
+      // if forceNonArticle was true or false last time.
+      this.cancelPotentialPendingReadabilityCheck();
+    }
+    this._pendingReadabilityCheck = this.onPaintWhenWaitedFor.bind(this, forceNonArticle);
+    addEventListener("MozAfterPaint", this._pendingReadabilityCheck);
+  },
+
+  onPaintWhenWaitedFor: function(forceNonArticle, event) {
+    // In non-e10s, we'll get called for paints other than ours, and so it's
+    // possible that this page hasn't been laid out yet, in which case we
+    // should wait until we get an event that does relate to our layout. We
+    // determine whether any of our content got painted by checking if there
+    // are any painted rects.
+    if (!event.clientRects.length) {
+      return;
+    }
+
+    this.cancelPotentialPendingReadabilityCheck();
+
+    // Only send updates when there are articles; there's no point updating with
+    // |false| all the time.
+    if (ReaderMode.isProbablyReaderable(content.document)) {
+      sendAsyncMessage("Reader:UpdateReaderButton", { isArticle: true });
+    } else if (forceNonArticle) {
+      sendAsyncMessage("Reader:UpdateReaderButton", { isArticle: false });
+    }
+  },
+};
+AboutReaderListener.init();
+
+addMessageListener("RemoteLogins:fillForm", function(message) {
+  LoginManagerContent.receiveMessage(message, content);
+});
+
+ExtensionContent.init(this);
+addEventListener("unload", () => {
+  ExtensionContent.uninit(this);
+});