Upstream oodles of Chrome for Android code into Chromium.

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

+// 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.View;
+
+import org.chromium.chrome.browser.Tab;
+import org.chromium.chrome.browser.compositor.LayerTitleCache;
+import org.chromium.chrome.browser.compositor.bottombar.contextualsearch.ContextualSearchPanel;
+import org.chromium.chrome.browser.compositor.bottombar.contextualsearch.ContextualSearchPanel.StateChangeReason;
+import org.chromium.chrome.browser.compositor.layouts.ContextualSearchSupportedLayout;
+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.EdgeSwipeEventFilter.ScrollDirection;
+import org.chromium.chrome.browser.compositor.layouts.eventfilter.EventFilter;
+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.util.MathUtils;
+import org.chromium.content.browser.ContentViewCore;
+import org.chromium.content_public.common.TopControlsState;
+import org.chromium.ui.resources.ResourceManager;
+
+/**
+ * A {@link Layout} that shows a Contextual Search overlay at the bottom.
+ */
+public class ContextualSearchLayout extends ContextualSearchSupportedLayout {
+    /**
+     * The height of the Toolbar in dps.
+     * TODO(pedrosimonetti): Get this value from the Toolbar code.
+     */
+    private static final float TOOLBAR_HEIGHT_DP = 56.f;
+
+    /**
+     * The initial Y position of the touch event.
+     */
+    private float mInitialPanelTouchY;
+
+    /**
+     * The base Tab.
+     */
+    private LayoutTab mBaseTab;
+
+    private final TabListSceneLayer mTabListSceneLayer;
+
+    /**
+     * @param context The current Android 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 ContextualSearchLayout(Context context, LayoutUpdateHost updateHost,
+            LayoutRenderHost renderHost, EventFilter eventFilter, ContextualSearchPanel panel) {
+        super(context, updateHost, renderHost, eventFilter, panel);
+        mTabListSceneLayer = new TabListSceneLayer();
+        // TODO(changwan): use SceneOverlayTree's setContentTree() instead once we refactor
+        // ContextualSearchSupportedLayout into LayoutHelper.
+        mTabListSceneLayer.setContentTree(super.getSceneLayer());
+    }
+
+    @Override
+    public View getViewForInteraction() {
+        ContentViewCore content = mSearchPanel.getManagementDelegate().getSearchContentViewCore();
+        if (content != null) return content.getContainerView();
+        return super.getViewForInteraction();
+    }
+
+    @Override
+    public int getSizingFlags() {
+        return SizingFlags.HELPER_SUPPORTS_FULLSCREEN;
+    }
+
+    @Override
+    public float getTopControlsOffset(float currentOffsetDp) {
+        return MathUtils.clamp(mBaseTab.getY(), -TOOLBAR_HEIGHT_DP, Math.min(currentOffsetDp, 0f));
+    }
+
+    @Override
+    protected void updateLayout(long time, long dt) {
+        super.updateLayout(time, dt);
+        if (mBaseTab == null) return;
+
+        mBaseTab.setY(mSearchPanel.getBasePageY());
+        mBaseTab.setBrightness(mSearchPanel.getBasePageBrightness());
+
+        boolean needUpdate = mBaseTab.updateSnap(dt);
+        if (needUpdate) requestUpdate();
+    }
+
+    @Override
+    public boolean handlesTabCreating() {
+        // Prevents the new Tab animation from happening when promoting to a new Tab.
+        startHiding(mBaseTab.getId(), false);
+        doneHiding();
+        // Updates TopControls' State so the Toolbar becomes visible.
+        // TODO(pedrosimonetti): The transition when promoting to a new tab is only smooth
+        // if the SearchContentView's vertical scroll position is zero. Otherwise the
+        // ContentView will appear to jump in the screen. Coordinate with @dtrainor to solve
+        // this problem.
+        mSearchPanel.getManagementDelegate().updateTopControlsState(TopControlsState.BOTH, false);
+        return true;
+    }
+
+    @Override
+    public void show(long time, boolean animate) {
+        super.show(time, animate);
+
+        resetLayout();
+        createBaseLayoutTab(mBaseTab);
+
+        mSearchPanel.createSearchPromo();
+    }
+
+    /**
+     * Resets the Layout.
+     */
+    private void resetLayout() {
+        mLayoutTabs = null;
+        mBaseTab = null;
+    }
+
+    /**
+     * Creates the Base Page's LayoutTab to be presented in the screen.
+     *
+     * @param layoutTab The {@link Layout} instance.
+     */
+    private void createBaseLayoutTab(LayoutTab layoutTab) {
+        if (mTabModelSelector == null) return;
+
+        int baseTabId = mTabModelSelector.getCurrentTabId();
+        if (baseTabId == Tab.INVALID_TAB_ID) return;
+
+        mBaseTab = createLayoutTab(
+                baseTabId, mTabModelSelector.isIncognitoSelected(), NO_CLOSE_BUTTON, NO_TITLE);
+
+        assert mBaseTab != null;
+        mBaseTab.setScale(1.f);
+        mBaseTab.setBorderScale(1.f);
+        mBaseTab.setBorderAlpha(0.f);
+
+        mLayoutTabs = new LayoutTab[] {mBaseTab};
+    }
+
+    // ============================================================================================
+    // Panel Host
+    // ============================================================================================
+
+    @Override
+    protected void hideContextualSearch(boolean immediately) {
+        if (isActive() && mBaseTab != null) {
+            startHiding(mBaseTab.getId(), false);
+            if (immediately) doneHiding();
+        }
+    }
+
+    // ============================================================================================
+    // cc::Layer Events
+    // ============================================================================================
+
+    @Override
+    public void onDown(long time, float x, float y) {
+        mInitialPanelTouchY = y;
+        mSearchPanel.handleSwipeStart();
+    }
+
+    @Override
+    public void drag(long time, float x, float y, float deltaX, float deltaY) {
+        final float ty = y - mInitialPanelTouchY;
+
+        mSearchPanel.handleSwipeMove(ty);
+    }
+
+    @Override
+    public void onUpOrCancel(long time) {
+        mSearchPanel.handleSwipeEnd();
+    }
+
+    @Override
+    public void fling(long time, float x, float y, float velocityX, float velocityY) {
+        mSearchPanel.handleFling(velocityY);
+    }
+
+    @Override
+    public void click(long time, float x, float y) {
+        mSearchPanel.handleClick(time, x, y);
+    }
+
+    // ============================================================================================
+    // Android View Events
+    // ============================================================================================
+
+    @Override
+    public void swipeStarted(long time, ScrollDirection direction, float x, float y) {
+        mSearchPanel.handleSwipeStart();
+    }
+
+    @Override
+    public void swipeUpdated(long time, float x, float y, float dx, float dy, float tx, float ty) {
+        mSearchPanel.handleSwipeMove(ty);
+    }
+
+    @Override
+    public void swipeFlingOccurred(
+            long time, float x, float y, float tx, float ty, float vx, float vy) {
+        mSearchPanel.handleFling(vy);
+    }
+
+    @Override
+    public void swipeFinished(long time) {
+        mSearchPanel.handleSwipeEnd();
+    }
+
+    @Override
+    public void swipeCancelled(long time) {
+        swipeFinished(time);
+    }
+
+    @Override
+    public boolean onBackPressed() {
+        mSearchPanel.closePanel(StateChangeReason.BACK_PRESS, true);
+        return true;
+    }
+
+    @Override
+    protected SceneLayer getSceneLayer() {
+        return mTabListSceneLayer;
+    }
+
+    @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 mTabListSceneLayer != null;
+        mTabListSceneLayer.pushLayers(getContext(), viewport, contentViewport, this,
+                layerTitleCache, tabContentManager, resourceManager);
+    }
+}