Upstream more layers, decoration title, layer_title_cache

chrome/android/java/src/org/chromium/chrome/browser/compositor/LayerTitleCache.java

Index: chrome/android/java/src/org/chromium/chrome/browser/compositor/LayerTitleCache.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/compositor/LayerTitleCache.java b/chrome/android/java/src/org/chromium/chrome/browser/compositor/LayerTitleCache.java
new file mode 100644
index 0000000000000000000000000000000000000000..32b869a8962587ae5a39fbae392e205bf54fa736
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/compositor/LayerTitleCache.java
@@ -0,0 +1,150 @@
+// 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;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.util.SparseArray;
+
+import org.chromium.base.CalledByNative;
+import org.chromium.base.JNINamespace;
+import org.chromium.chrome.R;
+import org.chromium.ui.resources.ResourceManager;
+import org.chromium.ui.resources.dynamics.BitmapDynamicResource;
+import org.chromium.ui.resources.dynamics.DynamicResourceLoader;
+
+/**
+ * A version of the {@link LayerTitleCache} that builds native cc::Layer objects
+ * that represent the cached title textures.
+ */
+@JNINamespace("chrome::android")
+public class LayerTitleCache implements TitleCache {
+    private long mNativeLayerTitleCache;
+    private final SparseArray<Title> mTitles = new SparseArray<Title>();
+    private ResourceManager mResourceManager;
+    private static int sNextResourceId = 1;
+
+    /**
+     * Builds an instance of the LayerTitleCache.
+     */
+    public LayerTitleCache(Context context) {
+        Resources res = context.getResources();
+        final int fadeWidthPx = res.getDimensionPixelOffset(R.dimen.border_texture_title_fade);
+        final int faviconStartPaddingPx =
+                res.getDimensionPixelSize(R.dimen.tab_title_favicon_start_padding);
+        final int faviconEndPaddingPx =
+                res.getDimensionPixelSize(R.dimen.tab_title_favicon_end_padding);
+        mNativeLayerTitleCache = nativeInit(fadeWidthPx, faviconStartPaddingPx, faviconEndPaddingPx,
+                R.drawable.spinner, R.drawable.spinner_white);
+    }
+
+    /**
+     * @param resourceManager The {@link ResourceManager} for registering title
+     *                        resources.
+     */
+    public void setResourceManager(ResourceManager resourceManager) {
+        mResourceManager = resourceManager;
+    }
+
+    /**
+     * Destroys the native reference.
+     */
+    public void shutDown() {
+        if (mNativeLayerTitleCache == 0) return;
+        nativeDestroy(mNativeLayerTitleCache);
+        mNativeLayerTitleCache = 0;
+    }
+
+    @CalledByNative
+    private long getNativePtr() {
+        return mNativeLayerTitleCache;
+    }
+
+    @Override
+    public void put(int tabId, Bitmap titleBitmap, Bitmap faviconBitmap, boolean isIncognito,
+            boolean isRtl) {
+        Title title = mTitles.get(tabId);
+        if (title == null) {
+            title = new Title();
+            mTitles.put(tabId, title);
+            title.register();
+        }
+
+        title.update(titleBitmap, faviconBitmap);
+
+        if (mNativeLayerTitleCache != 0) {
+            nativeUpdateLayer(mNativeLayerTitleCache, tabId, title.getTitleResId(),
+                    title.getFaviconResId(), isIncognito, isRtl);
+        }
+    }
+
+    @Override
+    public void remove(int tabId) {
+        Title title = mTitles.get(tabId);
+        if (title == null) return;
+        title.unregister();
+        mTitles.remove(tabId);
+        if (mNativeLayerTitleCache == 0) return;
+        nativeUpdateLayer(mNativeLayerTitleCache, tabId, -1, -1, false, false);
+    }
+
+    @Override
+    public void clearExcept(int exceptId) {
+        Title title = mTitles.get(exceptId);
+        for (int i = 0; i < mTitles.size(); i++) {
+            Title toDelete = mTitles.get(mTitles.keyAt(i));
+            if (toDelete == title) continue;
+            toDelete.unregister();
+        }
+        mTitles.clear();
+
+        if (title != null) mTitles.put(exceptId, title);
+
+        if (mNativeLayerTitleCache == 0) return;
+        nativeClearExcept(mNativeLayerTitleCache, exceptId);
+    }
+
+    private class Title {
+        private final BitmapDynamicResource mFavicon = new BitmapDynamicResource(sNextResourceId++);
+        private final BitmapDynamicResource mTitle = new BitmapDynamicResource(sNextResourceId++);
+
+        public Title() {}
+
+        public void update(Bitmap titleBitmap, Bitmap faviconBitmap) {
+            mFavicon.setBitmap(faviconBitmap);
+            mTitle.setBitmap(titleBitmap);
+        }
+
+        public void register() {
+            if (mResourceManager == null) return;
+            DynamicResourceLoader loader = mResourceManager.getBitmapDynamicResourceLoader();
+            loader.registerResource(mFavicon.getResId(), mFavicon);
+            loader.registerResource(mTitle.getResId(), mTitle);
+        }
+
+        public void unregister() {
+            if (mResourceManager == null) return;
+            DynamicResourceLoader loader = mResourceManager.getBitmapDynamicResourceLoader();
+            loader.unregisterResource(mFavicon.getResId());
+            loader.unregisterResource(mTitle.getResId());
+        }
+
+        public int getFaviconResId() {
+            return mFavicon.getResId();
+        }
+
+        public int getTitleResId() {
+            return mTitle.getResId();
+        }
+    }
+
+    private native long nativeInit(int fadeWidth, int faviconStartlPadding, int faviconEndPadding,
+            int spinnerResId, int spinnerIncognitoResId);
+    private static native void nativeDestroy(long nativeLayerTitleCache);
+    private native void nativeClearExcept(long nativeLayerTitleCache, int exceptId);
+    private native void nativeUpdateLayer(long nativeLayerTitleCache, int tabId, int titleResId,
+            int faviconResId, boolean isIncognito, boolean isRtl);
+}