Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/compositor/layouts/phone/SimpleAnimationLayout.java

Index: chrome/android/java_staging/src/org/chromium/chrome/browser/compositor/layouts/phone/SimpleAnimationLayout.java
diff --git a/chrome/android/java_staging/src/org/chromium/chrome/browser/compositor/layouts/phone/SimpleAnimationLayout.java b/chrome/android/java_staging/src/org/chromium/chrome/browser/compositor/layouts/phone/SimpleAnimationLayout.java
new file mode 100644
index 0000000000000000000000000000000000000000..274b2b9da6e4de8f6c980771e16502260eb529ad
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+++ b/chrome/android/java_staging/src/org/chromium/chrome/browser/compositor/layouts/phone/SimpleAnimationLayout.java
@@ -0,0 +1,414 @@
+// 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.layouts.phone;
+
+import android.content.Context;
+import android.graphics.Rect;
+import android.view.animation.Interpolator;
+
+import org.chromium.chrome.browser.compositor.LayerTitleCache;
+import org.chromium.chrome.browser.compositor.layouts.ChromeAnimation.Animatable;
+import org.chromium.chrome.browser.compositor.layouts.Layout;
+import org.chromium.chrome.browser.compositor.layouts.LayoutRenderHost;
+import org.chromium.chrome.browser.compositor.layouts.LayoutUpdateHost;
+import org.chromium.chrome.browser.compositor.layouts.components.LayoutTab;
+import org.chromium.chrome.browser.compositor.layouts.content.TabContentManager;
+import org.chromium.chrome.browser.compositor.layouts.eventfilter.EventFilter;
+import org.chromium.chrome.browser.compositor.layouts.phone.stack.Stack;
+import org.chromium.chrome.browser.compositor.layouts.phone.stack.StackAnimation;
+import org.chromium.chrome.browser.compositor.scene_layer.SceneLayer;
+import org.chromium.chrome.browser.compositor.scene_layer.TabListSceneLayer;
+import org.chromium.chrome.browser.fullscreen.ChromeFullscreenManager;
+import org.chromium.chrome.browser.tabmodel.TabModel;
+import org.chromium.ui.interpolators.BakedBezierInterpolator;
+import org.chromium.ui.resources.ResourceManager;
+
+import java.util.Arrays;
+import java.util.LinkedList;
+
+/**
+ * This class handles animating the opening of new tabs.
+ */
+public class SimpleAnimationLayout
+        extends Layout implements Animatable<SimpleAnimationLayout.Property> {
+    /**
+     * Animation properties
+     */
+    public enum Property { DISCARD_AMOUNT }
+
+    /** Duration of the first step of the background animation: zooming out, rotating in */
+    private static final long BACKGROUND_STEP1_DURATION = 300;
+    /** Duration of the second step of the background animation: pause */
+    private static final long BACKGROUND_STEP2_DURATION = 150;
+    /** Duration of the third step of the background animation: zooming in, sliding out */
+    private static final long BACKGROUND_STEP3_DURATION = 300;
+    /** Start time offset of the third step of the background animation */
+    private static final long BACKGROUND_STEP3_START =
+            BACKGROUND_STEP1_DURATION + BACKGROUND_STEP2_DURATION;
+    /** Percentage of the screen covered by the new tab */
+    private static final float BACKGROUND_COVER_PCTG = 0.5f;
+
+    /** The time duration of the animation */
+    protected static final int FOREGROUND_ANIMATION_DURATION = 300;
+
+    /** The time duration of the animation */
+    protected static final int TAB_CLOSED_ANIMATION_DURATION = 250;
+
+    /**
+     * A cached {@link LayoutTab} representation of the currently closing tab. If it's not
+     * null, it means tabClosing() has been called to start animation setup but
+     * tabClosed() has not yet been called to finish animation startup
+     */
+    private LayoutTab mClosedTab;
+
+    private LayoutTab mAnimatedTab;
+    private final TabListSceneLayer mSceneLayer;
+
+    /**
+     * Creates an instance of the {@link SimpleAnimationLayout}.
+     * @param context     The current Android's context.
+     * @param updateHost  The {@link LayoutUpdateHost} view for this layout.
+     * @param renderHost  The {@link LayoutRenderHost} view for this layout.
+     * @param eventFilter The {@link EventFilter} that is needed for this view.
+     */
+    public SimpleAnimationLayout(Context context, LayoutUpdateHost updateHost,
+            LayoutRenderHost renderHost, EventFilter eventFilter) {
+        super(context, updateHost, renderHost, eventFilter);
+        mSceneLayer = new TabListSceneLayer();
+    }
+
+    @Override
+    public int getSizingFlags() {
+        return SizingFlags.HELPER_SUPPORTS_FULLSCREEN;
+    }
+
+    @Override
+    public void show(long time, boolean animate) {
+        super.show(time, animate);
+        reset();
+    }
+
+    @Override
+    public boolean handlesTabCreating() {
+        return true;
+    }
+
+    @Override
+    public boolean handlesTabClosing() {
+        return true;
+    }
+
+    @Override
+    protected void updateLayout(long time, long dt) {
+        super.updateLayout(time, dt);
+        if (mLayoutTabs == null) return;
+        boolean needUpdate = false;
+        for (int i = mLayoutTabs.length - 1; i >= 0; i--) {
+            needUpdate = mLayoutTabs[i].updateSnap(dt) || needUpdate;
+        }
+        if (needUpdate) requestUpdate();
+    }
+
+    @Override
+    public void onTabCreating(int sourceTabId) {
+        super.onTabCreating(sourceTabId);
+        reset();
+
+        // Make sure any currently running animations can't influence tab if we are reusing it.
+        forceAnimationToFinish();
+
+        ensureSourceTabCreated(sourceTabId);
+    }
+
+    private void ensureSourceTabCreated(int sourceTabId) {
+        if (mLayoutTabs != null && mLayoutTabs.length == 1
+                && mLayoutTabs[0].getId() == sourceTabId) {
+            return;
+        }
+        // Just draw the source tab on the screen.
+        TabModel sourceModel = mTabModelSelector.getModelForTabId(sourceTabId);
+        if (sourceModel == null) return;
+        LayoutTab sourceLayoutTab =
+                createLayoutTab(sourceTabId, sourceModel.isIncognito(), NO_CLOSE_BUTTON, NO_TITLE);
+        sourceLayoutTab.setBorderAlpha(0.0f);
+
+        mLayoutTabs = new LayoutTab[] {sourceLayoutTab};
+        updateCacheVisibleIds(new LinkedList<Integer>(Arrays.asList(sourceTabId)));
+    }
+
+    @Override
+    public void onTabCreated(long time, int id, int index, int sourceId, boolean newIsIncognito,
+            boolean background, float originX, float originY) {
+        super.onTabCreated(time, id, index, sourceId, newIsIncognito, background, originX, originY);
+        ensureSourceTabCreated(sourceId);
+        if (background && mLayoutTabs != null && mLayoutTabs.length > 0) {
+            tabCreatedInBackground(id, sourceId, newIsIncognito, originX, originY);
+        } else {
+            tabCreatedInForeground(id, sourceId, newIsIncognito, originX, originY);
+        }
+    }
+
+    /**
+     * Animate opening a tab in the foreground.
+     *
+     * @param id             The id of the new tab to animate.
+     * @param sourceId       The id of the tab that spawned this new tab.
+     * @param newIsIncognito true if the new tab is an incognito tab.
+     * @param originX        The X coordinate of the last touch down event that spawned this tab.
+     * @param originY        The Y coordinate of the last touch down event that spawned this tab.
+     */
+    private void tabCreatedInForeground(
+            int id, int sourceId, boolean newIsIncognito, float originX, float originY) {
+        LayoutTab newLayoutTab = createLayoutTab(id, newIsIncognito, NO_CLOSE_BUTTON, NO_TITLE);
+        if (mLayoutTabs == null || mLayoutTabs.length == 0) {
+            mLayoutTabs = new LayoutTab[] {newLayoutTab};
+        } else {
+            mLayoutTabs = new LayoutTab[] {mLayoutTabs[0], newLayoutTab};
+        }
+        updateCacheVisibleIds(new LinkedList<Integer>(Arrays.asList(id, sourceId)));
+
+        newLayoutTab.setBorderAlpha(0.0f);
+        newLayoutTab.setStaticToViewBlend(1.f);
+
+        forceAnimationToFinish();
+
+        Interpolator interpolator = BakedBezierInterpolator.TRANSFORM_CURVE;
+        addToAnimation(newLayoutTab, LayoutTab.Property.SCALE, 0.f, 1.f,
+                FOREGROUND_ANIMATION_DURATION, 0, false, interpolator);
+        addToAnimation(newLayoutTab, LayoutTab.Property.ALPHA, 0.f, 1.f,
+                FOREGROUND_ANIMATION_DURATION, 0, false, interpolator);
+        addToAnimation(newLayoutTab, LayoutTab.Property.X, originX, 0.f,
+                FOREGROUND_ANIMATION_DURATION, 0, false, interpolator);
+        addToAnimation(newLayoutTab, LayoutTab.Property.Y, originY, 0.f,
+                FOREGROUND_ANIMATION_DURATION, 0, false, interpolator);
+
+        mTabModelSelector.selectModel(newIsIncognito);
+        startHiding(id, false);
+    }
+
+    /**
+     * Animate opening a tab in the background.
+     *
+     * @param id             The id of the new tab to animate.
+     * @param sourceId       The id of the tab that spawned this new tab.
+     * @param newIsIncognito true if the new tab is an incognito tab.
+     * @param originX        The X screen coordinate in dp of the last touch down event that spawned
+     *                       this tab.
+     * @param originY        The Y screen coordinate in dp of the last touch down event that spawned
+     *                       this tab.
+     */
+    private void tabCreatedInBackground(
+            int id, int sourceId, boolean newIsIncognito, float originX, float originY) {
+        LayoutTab newLayoutTab = createLayoutTab(id, newIsIncognito, NO_CLOSE_BUTTON, NEED_TITLE);
+        // mLayoutTabs should already have the source tab from tabCreating().
+        assert mLayoutTabs.length == 1;
+        LayoutTab sourceLayoutTab = mLayoutTabs[0];
+        mLayoutTabs = new LayoutTab[] {sourceLayoutTab, newLayoutTab};
+        updateCacheVisibleIds(new LinkedList<Integer>(Arrays.asList(id, sourceId)));
+
+        forceAnimationToFinish();
+
+        newLayoutTab.setBorderAlpha(0.0f);
+        final float scale = StackAnimation.SCALE_AMOUNT;
+        final float margin = Math.min(getWidth(), getHeight()) * (1.0f - scale) / 2.0f;
+
+        // Step 1: zoom out the source tab and bring in the new tab
+        addToAnimation(sourceLayoutTab, LayoutTab.Property.SCALE, 1.0f, scale,
+                BACKGROUND_STEP1_DURATION, 0, false, BakedBezierInterpolator.TRANSFORM_CURVE);
+        addToAnimation(sourceLayoutTab, LayoutTab.Property.X, 0.0f, margin,
+                BACKGROUND_STEP1_DURATION, 0, false, BakedBezierInterpolator.TRANSFORM_CURVE);
+        addToAnimation(sourceLayoutTab, LayoutTab.Property.Y, 0.0f, margin,
+                BACKGROUND_STEP1_DURATION, 0, false, BakedBezierInterpolator.TRANSFORM_CURVE);
+        addToAnimation(sourceLayoutTab, LayoutTab.Property.BORDER_SCALE, 1.0f / scale, 1.0f,
+                BACKGROUND_STEP1_DURATION, 0, false, BakedBezierInterpolator.TRANSFORM_CURVE);
+        addToAnimation(sourceLayoutTab, LayoutTab.Property.BORDER_ALPHA, 0.0f, 1.0f,
+                BACKGROUND_STEP1_DURATION, 0, false, BakedBezierInterpolator.TRANSFORM_CURVE);
+
+        float pauseX = margin;
+        float pauseY = margin;
+        if (getOrientation() == Orientation.PORTRAIT) {
+            pauseY = BACKGROUND_COVER_PCTG * getHeight();
+        } else {
+            pauseX = BACKGROUND_COVER_PCTG * getWidth();
+        }
+
+        addToAnimation(newLayoutTab, LayoutTab.Property.ALPHA, 0.0f, 1.0f,
+                BACKGROUND_STEP1_DURATION / 2, 0, false, BakedBezierInterpolator.FADE_IN_CURVE);
+        addToAnimation(newLayoutTab, LayoutTab.Property.SCALE, 0.f, scale,
+                BACKGROUND_STEP1_DURATION, 0, false, BakedBezierInterpolator.FADE_IN_CURVE);
+        addToAnimation(newLayoutTab, LayoutTab.Property.X, originX, pauseX,
+                BACKGROUND_STEP1_DURATION, 0, false, BakedBezierInterpolator.FADE_IN_CURVE);
+        addToAnimation(newLayoutTab, LayoutTab.Property.Y, originY, pauseY,
+                BACKGROUND_STEP1_DURATION, 0, false, BakedBezierInterpolator.FADE_IN_CURVE);
+
+        // step 2: pause and admire the nice tabs
+
+        // step 3: zoom in the source tab and slide down the new tab
+        addToAnimation(sourceLayoutTab, LayoutTab.Property.SCALE, scale, 1.0f,
+                BACKGROUND_STEP3_DURATION, BACKGROUND_STEP3_START, true,
+                BakedBezierInterpolator.TRANSFORM_CURVE);
+        addToAnimation(sourceLayoutTab, LayoutTab.Property.X, margin, 0.0f,
+                BACKGROUND_STEP3_DURATION, BACKGROUND_STEP3_START, true,
+                BakedBezierInterpolator.TRANSFORM_CURVE);
+        addToAnimation(sourceLayoutTab, LayoutTab.Property.Y, margin, 0.0f,
+                BACKGROUND_STEP3_DURATION, BACKGROUND_STEP3_START, true,
+                BakedBezierInterpolator.TRANSFORM_CURVE);
+        addToAnimation(sourceLayoutTab, LayoutTab.Property.BORDER_SCALE, 1.0f, 1.0f / scale,
+                BACKGROUND_STEP3_DURATION, BACKGROUND_STEP3_START, true,
+                BakedBezierInterpolator.TRANSFORM_CURVE);
+        addToAnimation(sourceLayoutTab, LayoutTab.Property.BORDER_ALPHA, 1.0f, 0.0f,
+                BACKGROUND_STEP3_DURATION, BACKGROUND_STEP3_START, true,
+                BakedBezierInterpolator.TRANSFORM_CURVE);
+
+        addToAnimation(newLayoutTab, LayoutTab.Property.ALPHA, 1.f, 0.f, BACKGROUND_STEP3_DURATION,
+                BACKGROUND_STEP3_START, true, BakedBezierInterpolator.FADE_OUT_CURVE);
+        if (getOrientation() == Orientation.PORTRAIT) {
+            addToAnimation(newLayoutTab, LayoutTab.Property.Y, pauseY, getHeight(),
+                    BACKGROUND_STEP3_DURATION, BACKGROUND_STEP3_START, true,
+                    BakedBezierInterpolator.FADE_OUT_CURVE);
+        } else {
+            addToAnimation(newLayoutTab, LayoutTab.Property.X, pauseX, getWidth(),
+                    BACKGROUND_STEP3_DURATION, BACKGROUND_STEP3_START, true,
+                    BakedBezierInterpolator.FADE_OUT_CURVE);
+        }
+
+        mTabModelSelector.selectModel(newIsIncognito);
+        startHiding(sourceId, false);
+    }
+
+    /**
+     * Set up for the tab closing animation
+     */
+    @Override
+    public void onTabClosing(long time, int id) {
+        reset();
+
+        // Make sure any currently running animations can't influence tab if we are reusing it.
+        forceAnimationToFinish();
+
+        // Create the {@link LayoutTab} for the tab before it is destroyed.
+        TabModel model = mTabModelSelector.getModelForTabId(id);
+        if (model != null) {
+            mClosedTab = createLayoutTab(id, model.isIncognito(), NO_CLOSE_BUTTON, NO_TITLE);
+            mClosedTab.setBorderAlpha(0.0f);
+            mLayoutTabs = new LayoutTab[] {mClosedTab};
+            updateCacheVisibleIds(new LinkedList<Integer>(Arrays.asList(id)));
+        } else {
+            mLayoutTabs = null;
+            mClosedTab = null;
+        }
+        // Only close the id at the end when we are done querying the model.
+        super.onTabClosing(time, id);
+    }
+
+    /**
+     * Animate the closing of a tab
+     */
+    @Override
+    public void onTabClosed(long time, int id, int nextId, boolean incognito) {
+        super.onTabClosed(time, id, nextId, incognito);
+
+        if (mClosedTab != null) {
+            TabModel nextModel = mTabModelSelector.getModelForTabId(nextId);
+            if (nextModel != null) {
+                LayoutTab nextLayoutTab =
+                        createLayoutTab(nextId, nextModel.isIncognito(), NO_CLOSE_BUTTON, NO_TITLE);
+                nextLayoutTab.setDrawDecoration(false);
+
+                mLayoutTabs = new LayoutTab[] {nextLayoutTab, mClosedTab};
+                updateCacheVisibleIds(
+                        new LinkedList<Integer>(Arrays.asList(nextId, mClosedTab.getId())));
+            } else {
+                mLayoutTabs = new LayoutTab[] {mClosedTab};
+            }
+
+            forceAnimationToFinish();
+            mAnimatedTab = mClosedTab;
+            addToAnimation(this, Property.DISCARD_AMOUNT, 0, getDiscardRange(),
+                    TAB_CLOSED_ANIMATION_DURATION, 0, false,
+                    BakedBezierInterpolator.FADE_OUT_CURVE);
+
+            mClosedTab = null;
+            if (nextModel != null) {
+                mTabModelSelector.selectModel(nextModel.isIncognito());
+            }
+        }
+        startHiding(nextId, false);
+    }
+
+    /**
+     * Updates the position, scale, rotation and alpha values of mAnimatedTab.
+     *
+     * @param discard The value that specify how far along are we in the discard animation. 0 is
+     *                filling the screen. Valid values are [-range .. range] where range is
+     *                computed by {@link SimpleAnimationLayout#getDiscardRange()}.
+     */
+    private void setDiscardAmount(float discard) {
+        if (mAnimatedTab != null) {
+            final float range = getDiscardRange();
+            final float scale = Stack.computeDiscardScale(discard, range, true);
+
+            final float deltaX = mAnimatedTab.getOriginalContentWidth();
+            final float deltaY = mAnimatedTab.getOriginalContentHeight() / 2.f;
+            mAnimatedTab.setX(deltaX * (1.f - scale));
+            mAnimatedTab.setY(deltaY * (1.f - scale));
+            mAnimatedTab.setScale(scale);
+            mAnimatedTab.setBorderScale(scale);
+            mAnimatedTab.setAlpha(Stack.computeDiscardAlpha(discard, range));
+        }
+    }
+
+    /**
+     * @return The range of the discard amount.
+     */
+    private float getDiscardRange() {
+        return Math.min(getWidth(), getHeight()) * Stack.DISCARD_RANGE_SCREEN;
+    }
+
+    @Override
+    public boolean onUpdateAnimation(long time, boolean jumpToEnd) {
+        return super.onUpdateAnimation(time, jumpToEnd) && mClosedTab == null;
+    }
+
+    /**
+     * Resets the internal state.
+     */
+    private void reset() {
+        mLayoutTabs = null;
+        mAnimatedTab = null;
+        mClosedTab = null;
+    }
+
+    /**
+     * Sets a property for an animation.
+     * @param prop The property to update
+     * @param value New value of the property
+     */
+    @Override
+    public void setProperty(Property prop, float value) {
+        switch (prop) {
+            case DISCARD_AMOUNT:
+                setDiscardAmount(value);
+                break;
+            default:
+        }
+    }
+
+    @Override
+    protected SceneLayer getSceneLayer() {
+        return mSceneLayer;
+    }
+
+    @Override
+    protected void updateSceneLayer(Rect viewport, Rect contentViewport,
+            LayerTitleCache layerTitleCache, TabContentManager tabContentManager,
+            ResourceManager resourceManager, ChromeFullscreenManager fullscreenManager) {
+        super.updateSceneLayer(viewport, contentViewport, layerTitleCache, tabContentManager,
+                resourceManager, fullscreenManager);
+        assert mSceneLayer != null;
+        mSceneLayer.pushLayers(getContext(), viewport, contentViewport, this, layerTitleCache,
+                tabContentManager, resourceManager);
+    }
+}