1 files changed, 135 insertions, 0 deletions
diff --git a/application/palemoon/base/content/newtab/page.js b/application/palemoon/base/content/newtab/page.js
new file mode 100644
index 000000000..afe5bfba8
--- /dev/null
+++ b/application/palemoon/base/content/newtab/page.js
@@ -0,0 +1,135 @@
+#ifdef 0
+/* 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/. */
+#endif
+
+/**
+ * This singleton represents the whole 'New Tab Page' and takes care of
+ * initializing all its components.
+ */
+let gPage = {
+  /**
+   * Initializes the page.
+   */
+  init: function Page_init() {
+    // Add ourselves to the list of pages to receive notifications.
+    gAllPages.register(this);
+
+    // Listen for 'unload' to unregister this page.
+    addEventListener("unload", this, false);
+
+    // Listen for toggle button clicks.
+    let button = document.getElementById("newtab-toggle");
+    button.addEventListener("click", this, false);
+
+    // Check if the new tab feature is enabled.
+    let enabled = gAllPages.enabled;
+    if (enabled)
+      this._init();
+
+    this._updateAttributes(enabled);
+  },
+
+  /**
+   * Listens for notifications specific to this page.
+   */
+  observe: function Page_observe() {
+    let enabled = gAllPages.enabled;
+    this._updateAttributes(enabled);
+
+    // Initialize the whole page if we haven't done that, yet.
+    if (enabled) {
+      this._init();
+    } else {
+      gUndoDialog.hide();
+    }
+  },
+
+  /**
+   * Updates the whole page and the grid when the storage has changed.
+   */
+  update: function Page_update() {
+    // The grid might not be ready yet as we initialize it asynchronously.
+    if (gGrid.ready) {
+      gGrid.refresh();
+    }
+  },
+
+  /**
+   * Internally initializes the page. This runs only when/if the feature
+   * is/gets enabled.
+   */
+  _init: function Page_init() {
+    if (this._initialized)
+      return;
+
+    this._initialized = true;
+
+    gLinks.populateCache(function () {
+      // Initialize and render the grid.
+      gGrid.init();
+
+      // Initialize the drop target shim.
+      gDropTargetShim.init();
+
+#ifdef XP_MACOSX
+      // Workaround to prevent a delay on MacOSX due to a slow drop animation.
+      document.addEventListener("dragover", this, false);
+      document.addEventListener("drop", this, false);
+#endif
+    }.bind(this));
+  },
+
+  /**
+   * Updates the 'page-disabled' attributes of the respective DOM nodes.
+   * @param aValue Whether the New Tab Page is enabled or not.
+   */
+  _updateAttributes: function Page_updateAttributes(aValue) {
+    // Set the nodes' states.
+    let nodeSelector = "#newtab-scrollbox, #newtab-toggle, #newtab-grid";
+    for (let node of document.querySelectorAll(nodeSelector)) {
+      if (aValue)
+        node.removeAttribute("page-disabled");
+      else
+        node.setAttribute("page-disabled", "true");
+    }
+
+    // Enables/disables the control and link elements.
+    let inputSelector = ".newtab-control, .newtab-link";
+    for (let input of document.querySelectorAll(inputSelector)) {
+      if (aValue) 
+        input.removeAttribute("tabindex");
+      else
+        input.setAttribute("tabindex", "-1");
+    }
+
+    // Update the toggle button's title.
+    let toggle = document.getElementById("newtab-toggle");
+    toggle.setAttribute("title", newTabString(aValue ? "hide" : "show"));
+  },
+
+  /**
+   * Handles all page events.
+   */
+  handleEvent: function Page_handleEvent(aEvent) {
+    switch (aEvent.type) {
+      case "unload":
+        gAllPages.unregister(this);
+        break;
+      case "click":
+        gAllPages.enabled = !gAllPages.enabled;
+        break;
+      case "dragover":
+        if (gDrag.isValid(aEvent) && gDrag.draggedSite)
+          aEvent.preventDefault();
+        break;
+      case "drop":
+        if (gDrag.isValid(aEvent) && gDrag.draggedSite) {
+          aEvent.preventDefault();
+          aEvent.stopPropagation();
+        }
+        break;
+    }
+  }
+};