Upstream Layout.java and associated files

chrome/android/java/src/org/chromium/chrome/browser/compositor/overlays/SceneOverlay.java

Index: chrome/android/java/src/org/chromium/chrome/browser/compositor/overlays/SceneOverlay.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/compositor/overlays/SceneOverlay.java b/chrome/android/java/src/org/chromium/chrome/browser/compositor/overlays/SceneOverlay.java
new file mode 100644
index 0000000000000000000000000000000000000000..7b211d16b08e068199dc81a5ece2ac26f589e516
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/compositor/overlays/SceneOverlay.java
@@ -0,0 +1,146 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.compositor.overlays;
+
+import org.chromium.chrome.browser.compositor.LayerTitleCache;
+import org.chromium.chrome.browser.compositor.layouts.components.VirtualView;
+import org.chromium.chrome.browser.compositor.layouts.eventfilter.EventFilter;
+import org.chromium.chrome.browser.compositor.scene_layer.SceneOverlayLayer;
+import org.chromium.chrome.browser.fullscreen.ChromeFullscreenManager;
+import org.chromium.chrome.browser.tabmodel.TabModel;
+import org.chromium.ui.resources.ResourceManager;
+
+import java.util.List;
+
+/**
+ * An interface which positions the actual tabs and adds additional UI to the them.
+ */
+public interface SceneOverlay {
+    /**
+     * Updates and gets a {@link SceneOverlayLayer} that represents an scene overlay.
+     *
+     * @param layerTitleCache A layer title cache.
+     * @param resourceManager A resource manager.
+     * @param fullscreenManager A fullscreen manager.
+     * @return A {@link SceneOverlayLayer} that represents an scene overlay.
+     * Or {@code null} if this {@link SceneOverlay} doesn't have a tree.
+     */
+    SceneOverlayLayer getUpdatedSceneOverlayTree(LayerTitleCache layerTitleCache,
+            ResourceManager resourceManager, ChromeFullscreenManager fullscreenManager);
+
+    /**
+     * @return The {@link EventFilter} that processes events for this {@link SceneOverlay}.
+     */
+    EventFilter getEventFilter();
+
+    /**
+     * Called when the viewport size of the screen changes.
+     * @param width                  The new width of the viewport available in dp.
+     * @param height                 The new height of the viewport available in dp.
+     * @param visibleViewportOffsetY The visible viewport Y offset in dp.
+     */
+    void onSizeChanged(float width, float height, float visibleViewportOffsetY);
+
+    /**
+     * @param views A list of virtual views representing compositor rendered views.
+     */
+    void getVirtualViews(List<VirtualView> views);
+
+    /**
+     * Helper-specific updates. Cascades the values updated by the animations and flings.
+     * @param time The current time of the app in ms.
+     * @param dt   The delta time between update frames in ms.
+     * @return     Whether the updating is done.
+     */
+    boolean updateOverlay(long time, long dt);
+
+    /**
+     * Notify the a title has changed.
+     *
+     * @param tabId     The id of the tab that has changed.
+     * @param title     The new title.
+     */
+    void tabTitleChanged(int tabId, String title);
+
+    /**
+     * Called when the active {@link TabModel} switched (e.g. standard -> incognito).
+     * @param incognito Whether or not the new active model is incognito.
+     */
+    void tabModelSwitched(boolean incognito);
+
+    /**
+     * Called when a tab get selected.
+     * @param time      The current time of the app in ms.
+     * @param incognito Whether or not the affected model was incognito.
+     * @param id        The id of the selected tab.
+     * @param prevId    The id of the previously selected tab.
+     */
+    void tabSelected(long time, boolean incognito, int id, int prevId);
+
+    /**
+     * Called when a tab has been moved in the tabModel.
+     * @param time      The current time of the app in ms.
+     * @param incognito Whether or not the affected model was incognito.
+     * @param id        The id of the Tab.
+     * @param oldIndex  The old index of the tab in the {@link TabModel}.
+     * @param newIndex  The new index of the tab in the {@link TabModel}.
+     */
+    void tabMoved(long time, boolean incognito, int id, int oldIndex, int newIndex);
+
+    /**
+     * Called when a tab is being closed. When called, the closing tab will not
+     * be part of the model.
+     * @param time      The current time of the app in ms.
+     * @param incognito Whether or not the affected model was incognito.
+     * @param id        The id of the tab being closed.
+     */
+    void tabClosed(long time, boolean incognito, int id);
+
+    /**
+     * Called when a tab close has been undone and the tab has been restored.
+     * @param time      The current time of the app in ms.
+     * @param id        The id of the Tab.
+     * @param incognito True if the tab is incognito
+     */
+    void tabClosureCancelled(long time, boolean incognito, int id);
+
+    /**
+     * Called when a tab is created from the top left button.
+     * @param time      The current time of the app in ms.
+     * @param incognito Whether or not the affected model was incognito.
+     * @param id        The id of the newly created tab.
+     * @param prevId    The id of the source tab.
+     * @param selected  Whether the tab will be selected.
+     */
+    void tabCreated(long time, boolean incognito, int id, int prevId, boolean selected);
+
+    /**
+     * Called when a tab has started loading.
+     * @param id        The id of the Tab.
+     * @param incognito True if the tab is incognito.
+     */
+    void tabPageLoadStarted(int id, boolean incognito);
+
+    /**
+     * Called when a tab has finished loading.
+     * @param id        The id of the Tab.
+     * @param incognito True if the tab is incognito.
+     */
+    void tabPageLoadFinished(int id, boolean incognito);
+
+    /**
+     * Called when a tab has started loading resources.
+     * @param id        The id of the Tab.
+     * @param incognito True if the tab is incognito.
+     */
+    void tabLoadStarted(int id, boolean incognito);
+
+    /**
+     * Called when a tab has stopped loading resources.
+     * @param id        The id of the Tab.
+     * @param incognito True if the tab is incognito.
+     */
+    void tabLoadFinished(int id, boolean incognito);
+}