| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package android.webkit; |
| |
| import android.graphics.Point; |
| import android.webkit.WebViewCore.DrawData; |
| |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| /** |
| * @hide |
| */ |
| class ViewStateSerializer { |
| |
| private static final int WORKING_STREAM_STORAGE = 16 * 1024; |
| |
| static final int VERSION = 1; |
| |
| static boolean serializeViewState(OutputStream stream, DrawData draw) |
| throws IOException { |
| int baseLayer = draw.mBaseLayer; |
| if (baseLayer == 0) { |
| return false; |
| } |
| DataOutputStream dos = new DataOutputStream(stream); |
| dos.writeInt(VERSION); |
| dos.writeInt(draw.mContentSize.x); |
| dos.writeInt(draw.mContentSize.y); |
| return nativeSerializeViewState(baseLayer, dos, |
| new byte[WORKING_STREAM_STORAGE]); |
| } |
| |
| static DrawData deserializeViewState(InputStream stream) |
| throws IOException { |
| DataInputStream dis = new DataInputStream(stream); |
| int version = dis.readInt(); |
| if (version > VERSION) { |
| throw new IOException("Unexpected version: " + version); |
| } |
| int contentWidth = dis.readInt(); |
| int contentHeight = dis.readInt(); |
| int baseLayer = nativeDeserializeViewState(version, dis, |
| new byte[WORKING_STREAM_STORAGE]); |
| |
| final WebViewCore.DrawData draw = new WebViewCore.DrawData(); |
| draw.mViewState = new WebViewCore.ViewState(); |
| draw.mContentSize = new Point(contentWidth, contentHeight); |
| draw.mBaseLayer = baseLayer; |
| stream.close(); |
| return draw; |
| } |
| |
| public static void dumpLayerHierarchy(int baseLayer, OutputStream out, int level) { |
| nativeDumpLayerHierarchy(baseLayer, level, out, |
| new byte[WORKING_STREAM_STORAGE]); |
| } |
| |
| |
| private static native void nativeDumpLayerHierarchy(int baseLayer, int level, |
| OutputStream out, byte[] storage); |
| |
| private static native boolean nativeSerializeViewState(int baseLayer, |
| OutputStream stream, byte[] storage); |
| |
| // Returns a pointer to the BaseLayer |
| private static native int nativeDeserializeViewState(int version, |
| InputStream stream, byte[] storage); |
| |
| private ViewStateSerializer() {} |
| } |