Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/compositor/overlays/strip/StripLayoutHelperManager.java

Index: chrome/android/java_staging/src/org/chromium/chrome/browser/compositor/overlays/strip/StripLayoutHelperManager.java
diff --git a/chrome/android/java_staging/src/org/chromium/chrome/browser/compositor/overlays/strip/StripLayoutHelperManager.java b/chrome/android/java_staging/src/org/chromium/chrome/browser/compositor/overlays/strip/StripLayoutHelperManager.java
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index 0000000000000000000000000000000000000000..cbca5f375d5b2c7dbd17625ef1bebc5d7dff7068
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+// Copyright 2015 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.strip;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.RectF;
+
+import com.google.android.apps.chrome.R;
+
+import org.chromium.base.VisibleForTesting;
+import org.chromium.chrome.browser.compositor.LayerTitleCache;
+import org.chromium.chrome.browser.compositor.layouts.LayoutRenderHost;
+import org.chromium.chrome.browser.compositor.layouts.LayoutUpdateHost;
+import org.chromium.chrome.browser.compositor.layouts.components.CompositorButton;
+import org.chromium.chrome.browser.compositor.layouts.components.VirtualView;
+import org.chromium.chrome.browser.compositor.layouts.content.TabContentManager;
+import org.chromium.chrome.browser.compositor.layouts.eventfilter.AreaGestureEventFilter;
+import org.chromium.chrome.browser.compositor.layouts.eventfilter.EventFilter;
+import org.chromium.chrome.browser.compositor.overlays.SceneOverlay;
+import org.chromium.chrome.browser.compositor.scene_layer.SceneOverlayLayer;
+import org.chromium.chrome.browser.compositor.scene_layer.TabStripSceneLayer;
+import org.chromium.chrome.browser.fullscreen.ChromeFullscreenManager;
+import org.chromium.chrome.browser.tabmodel.TabCreatorManager;
+import org.chromium.chrome.browser.tabmodel.TabModelSelector;
+import org.chromium.ui.resources.ResourceManager;
+
+import java.util.List;
+
+/**
+ * This class handles managing which {@link StripLayoutHelper} is currently active and dispatches
+ * all input and model events to the proper destination.
+ */
+public class StripLayoutHelperManager implements SceneOverlay {
+    // Visibility Constants
+    private static final float TAB_STRIP_HEIGHT_DP = 40.f;
+
+    // Caching Variables
+    private final RectF mStripFilterArea = new RectF();
+
+    // 1px border colors
+    private static final float BORDER_OPACITY = 0.2f;
+    private static final float BORDER_OPACITY_INCOGNITO = 0.4f;
+
+    // Model selector buttons constants.
+    private static final float MODEL_SELECTOR_BUTTON_Y_OFFSET_DP = 10.f;
+    private static final float MODEL_SELECTOR_BUTTON_RIGHT_PADDING_DP = 6.f;
+    private static final float MODEL_SELECTOR_BUTTON_LEFT_PADDING_DP = 3.f;
+    private static final float MODEL_SELECTOR_BUTTON_WIDTH_DP = 24.f;
+    private static final float MODEL_SELECTOR_BUTTON_HEIGHT_DP = 24.f;
+
+    // External influences
+    private TabModelSelector mTabModelSelector;
+    private final LayoutUpdateHost mUpdateHost;
+    private final LayoutRenderHost mRenderHost;
+
+    // Event Filters
+    private final AreaGestureEventFilter mEventFilter;
+
+    // Internal state
+    private boolean mIsIncognito;
+    private final StripLayoutHelper mNormalHelper;
+    private final StripLayoutHelper mIncognitoHelper;
+
+    // UI State
+    private float mWidth;
+    private final float mHeight;
+    private final CompositorButton mModelSelectorButton;
+
+    private TabStripSceneLayer mTabStripTreeProvider;
+
+    /**
+     * Creates an instance of the {@link StripLayoutHelperManager}.
+     * @param context           The current Android {@link Context}.
+     * @param updateHost        The parent {@link LayoutUpdateHost}.
+     * @param renderHost        The {@link LayoutRenderHost}.
+     */
+    public StripLayoutHelperManager(Context context, LayoutUpdateHost updateHost,
+            LayoutRenderHost renderHost, AreaGestureEventFilter eventFilter) {
+        mHeight = TAB_STRIP_HEIGHT_DP;
+
+        mUpdateHost = updateHost;
+        mRenderHost = renderHost;
+        mTabStripTreeProvider = new TabStripSceneLayer(context);
+
+        mEventFilter = eventFilter;
+
+        mNormalHelper = new StripLayoutHelper(context, updateHost, renderHost, false);
+        mIncognitoHelper = new StripLayoutHelper(context, updateHost, renderHost, true);
+
+        mModelSelectorButton = new CompositorButton(
+                context, MODEL_SELECTOR_BUTTON_WIDTH_DP, MODEL_SELECTOR_BUTTON_HEIGHT_DP);
+        mModelSelectorButton.setIncognito(false);
+        mModelSelectorButton.setVisible(false);
+        // Pressed resources are the same as the unpressed resources.
+        mModelSelectorButton.setResources(R.drawable.btn_tabstrip_switch_normal,
+                R.drawable.btn_tabstrip_switch_normal, R.drawable.btn_tabstrip_switch_incognito,
+                R.drawable.btn_tabstrip_switch_incognito);
+        mModelSelectorButton.setY(MODEL_SELECTOR_BUTTON_Y_OFFSET_DP);
+
+        Resources res = context.getResources();
+        mModelSelectorButton.setAccessibilityDescription(
+                res.getString(R.string.accessibility_tabstrip_btn_incognito_toggle_standard),
+                res.getString(R.string.accessibility_tabstrip_btn_incognito_toggle_incognito));
+
+        onContextChanged(context);
+    }
+
+    /**
+     * Cleans up internal state.
+     */
+    public void destroy() {
+        mTabStripTreeProvider.destroy();
+        mTabStripTreeProvider = null;
+    }
+
+    @Override
+    public SceneOverlayLayer getUpdatedSceneOverlayTree(LayerTitleCache layerTitleCache,
+            ResourceManager resourceManager, ChromeFullscreenManager fullscreenManager) {
+        assert mTabStripTreeProvider != null;
+
+        mTabStripTreeProvider.pushAndUpdateStrip(this, layerTitleCache, resourceManager,
+                fullscreenManager, getActiveStripLayoutHelper().getStripLayoutTabsToRender());
+        return mTabStripTreeProvider;
+    }
+
+    @Override
+    public EventFilter getEventFilter() {
+        return mEventFilter;
+    }
+
+    @Override
+    public void onSizeChanged(float width, float height, float visibleViewportOffsetY) {
+        mWidth = width;
+        mModelSelectorButton.setX(
+                mWidth - MODEL_SELECTOR_BUTTON_WIDTH_DP - MODEL_SELECTOR_BUTTON_RIGHT_PADDING_DP);
+        mNormalHelper.onSizeChanged(mWidth, mHeight);
+        mIncognitoHelper.onSizeChanged(mWidth, mHeight);
+
+        mStripFilterArea.set(0, 0, mWidth, Math.min(getHeight(), visibleViewportOffsetY));
+        mEventFilter.setEventArea(mStripFilterArea);
+    }
+
+    public CompositorButton getNewTabButton() {
+        return getActiveStripLayoutHelper().getNewTabButton();
+    }
+
+    public CompositorButton getModelSelectorButton() {
+        return mModelSelectorButton;
+    }
+
+    @Override
+    public void getVirtualViews(List<VirtualView> views) {
+        if (mModelSelectorButton.isVisible()) views.add(mModelSelectorButton);
+        getActiveStripLayoutHelper().getVirtualViews(views);
+    }
+
+    public float getStripBrightness() {
+        return getActiveStripLayoutHelper().getStripBrightness();
+    }
+
+    /**
+     * Sets the {@link TabModelSelector} that this {@link StripLayoutHelperManager} will visually
+     * represent, and various objects associated with it.
+     * @param modelSelector The {@link TabModelSelector} to visually represent.
+     * @param tabCreatorManager The {@link TabCreatorManager}, used to create new tabs.
+     * @param tabContentManager The {@link TabContentManager}, used to provide display content for
+     *                          tabs.
+     */
+    public void setTabModelSelector(TabModelSelector modelSelector,
+            TabCreatorManager tabCreatorManager, TabContentManager tabContentManager) {
+        if (mTabModelSelector == modelSelector) return;
+        mTabModelSelector = modelSelector;
+        mNormalHelper.setTabModel(mTabModelSelector.getModel(false), tabContentManager,
+                tabCreatorManager.getTabCreator(false));
+        mIncognitoHelper.setTabModel(mTabModelSelector.getModel(true), tabContentManager,
+                tabCreatorManager.getTabCreator(true));
+        tabModelSwitched(mTabModelSelector.isIncognitoSelected());
+    }
+
+    @Override
+    public void tabTitleChanged(int tabId, String title) {
+        getActiveStripLayoutHelper().tabTitleChanged(tabId, title);
+    }
+
+    public float getHeight() {
+        return mHeight;
+    }
+
+    public float getWidth() {
+        return mWidth;
+    }
+
+    public float getBorderOpacity() {
+        return mIsIncognito ? BORDER_OPACITY_INCOGNITO : BORDER_OPACITY;
+    }
+
+    /**
+     * Updates all internal resources and dimensions.
+     * @param context The current Android {@link Context}.
+     */
+    public void onContextChanged(Context context) {
+        mNormalHelper.onContextChanged(context);
+        mIncognitoHelper.onContextChanged(context);
+    }
+
+    @Override
+    public boolean updateOverlay(long time, long dt) {
+        getInactiveStripLayoutHelper().finishAnimation();
+        return getActiveStripLayoutHelper().updateLayout(time, dt);
+    }
+
+    @Override
+    public void tabModelSwitched(boolean incognito) {
+        if (incognito == mIsIncognito) return;
+        mIsIncognito = incognito;
+
+        updateModelSwitcherButton();
+
+        mUpdateHost.requestUpdate();
+    }
+
+    private void updateModelSwitcherButton() {
+        mModelSelectorButton.setIncognito(mIsIncognito);
+        if (mTabModelSelector != null) {
+            boolean isVisible = mTabModelSelector.getModel(true).getCount() != 0;
+            mModelSelectorButton.setVisible(isVisible);
+
+            float rightMargin = isVisible
+                    ? MODEL_SELECTOR_BUTTON_WIDTH_DP + MODEL_SELECTOR_BUTTON_RIGHT_PADDING_DP
+                            + MODEL_SELECTOR_BUTTON_LEFT_PADDING_DP
+                    : 0.0f;
+            mNormalHelper.setRightMargin(rightMargin);
+            mIncognitoHelper.setRightMargin(rightMargin);
+        }
+    }
+
+    @Override
+    public void tabSelected(long time, boolean incognito, int id, int prevId) {
+        getStripLayoutHelper(incognito).tabSelected(time, id, prevId);
+    }
+
+    @Override
+    public void tabMoved(long time, boolean incognito, int id, int oldIndex, int newIndex) {
+        getStripLayoutHelper(incognito).tabMoved(time, id, oldIndex, newIndex);
+    }
+
+    @Override
+    public void tabClosed(long time, boolean incognito, int id) {
+        getStripLayoutHelper(incognito).tabClosed(time, id);
+        updateModelSwitcherButton();
+    }
+
+    @Override
+    public void tabClosureCancelled(long time, boolean incognito, int id) {
+        getStripLayoutHelper(incognito).tabClosureCancelled(time, id);
+        updateModelSwitcherButton();
+    }
+
+    @Override
+    public void tabCreated(long time, boolean incognito, int id, int prevId, boolean selected) {
+        getStripLayoutHelper(incognito).tabCreated(time, id, prevId, selected);
+    }
+
+    @Override
+    public void tabPageLoadStarted(int id, boolean incognito) {
+        getStripLayoutHelper(incognito).tabPageLoadStarted(id);
+    }
+
+    @Override
+    public void tabPageLoadFinished(int id, boolean incognito) {
+        getStripLayoutHelper(incognito).tabPageLoadFinished(id);
+    }
+
+    @Override
+    public void tabLoadStarted(int id, boolean incognito) {
+        getStripLayoutHelper(incognito).tabLoadStarted(id);
+    }
+
+    @Override
+    public void tabLoadFinished(int id, boolean incognito) {
+        getStripLayoutHelper(incognito).tabLoadFinished(id);
+    }
+
+    /**
+     * Called on touch drag event.
+     * @param time   The current time of the app in ms.
+     * @param x      The y coordinate of the end of the drag event.
+     * @param y      The y coordinate of the end of the drag event.
+     * @param deltaX The number of pixels dragged in the x direction.
+     * @param deltaY The number of pixels dragged in the y direction.
+     * @param totalX The total delta x since the drag started.
+     * @param totalY The total delta y since the drag started.
+     */
+    public void drag(
+            long time, float x, float y, float deltaX, float deltaY, float totalX, float totalY) {
+        mModelSelectorButton.drag(x, y);
+        getActiveStripLayoutHelper().drag(time, x, y, deltaX, deltaY, totalX, totalY);
+    }
+
+    /**
+     * Called on touch fling event. This is called before the onUpOrCancel event.
+     * @param time      The current time of the app in ms.
+     * @param x         The y coordinate of the start of the fling event.
+     * @param y         The y coordinate of the start of the fling event.
+     * @param velocityX The amount of velocity in the x direction.
+     * @param velocityY The amount of velocity in the y direction.
+     */
+    public void fling(long time, float x, float y, float velocityX, float velocityY) {
+        getActiveStripLayoutHelper().fling(time, x, y, velocityX, velocityY);
+    }
+
+    /**
+     * Called on onDown event.
+     * @param time The time stamp in millisecond of the event.
+     * @param x    The x position of the event.
+     * @param y    The y position of the event.
+     */
+    public void onDown(long time, float x, float y) {
+        if (mModelSelectorButton.onDown(x, y)) return;
+        getActiveStripLayoutHelper().onDown(time, x, y);
+    }
+
+    /**
+     * Called on long press touch event.
+     * @param time The current time of the app in ms.
+     * @param x    The x coordinate of the position of the press event.
+     * @param y    The y coordinate of the position of the press event.
+     */
+    public void onLongPress(long time, float x, float y) {
+        getActiveStripLayoutHelper().onLongPress(time, x, y);
+    }
+
+    /**
+     * Called on click. This is called before the onUpOrCancel event.
+     * @param time The current time of the app in ms.
+     * @param x    The x coordinate of the position of the click.
+     * @param y    The y coordinate of the position of the click.
+     */
+    public void click(long time, float x, float y) {
+        if (mModelSelectorButton.click(x, y) && mTabModelSelector != null) {
+            mTabModelSelector.selectModel(!mTabModelSelector.isIncognitoSelected());
+            return;
+        }
+        getActiveStripLayoutHelper().click(time, x, y);
+    }
+
+    /**
+     * Called on up or cancel touch events. This is called after the click and fling event if any.
+     * @param time The current time of the app in ms.
+     */
+    public void onUpOrCancel(long time) {
+        if (mModelSelectorButton.onUpOrCancel() && mTabModelSelector != null) {
+            mTabModelSelector.selectModel(!mTabModelSelector.isIncognitoSelected());
+            return;
+        }
+        getActiveStripLayoutHelper().onUpOrCancel(time);
+    }
+
+    /**
+     * @param incognito Whether or not you want the incognito StripLayoutHelper
+     * @return The requested StripLayoutHelper.
+     */
+    @VisibleForTesting
+    public StripLayoutHelper getStripLayoutHelper(boolean incognito) {
+        return incognito ? mIncognitoHelper : mNormalHelper;
+    }
+
+    /**
+     * @return The currently visible strip layout helper.
+     */
+    @VisibleForTesting
+    public StripLayoutHelper getActiveStripLayoutHelper() {
+        return getStripLayoutHelper(mIsIncognito);
+    }
+
+    private StripLayoutHelper getInactiveStripLayoutHelper() {
+        return mIsIncognito ? mNormalHelper : mIncognitoHelper;
+    }
+}