Save and load snapshots async (ee3b562d) · Commits · e / os / android_frameworks_base

core/java/android/webkit/ViewStateSerializer.java

+6 −9

Original line number	Diff line number	Diff line
		@@ -34,21 +34,21 @@ class ViewStateSerializer {

		static final int VERSION = 1;

		static boolean serializeViewState(OutputStream stream, WebViewClassic web)
		static boolean serializeViewState(OutputStream stream, DrawData draw)
		throws IOException {
		int baseLayer = web.getBaseLayer();
		int baseLayer = draw.mBaseLayer;
		if (baseLayer == 0) {
		return false;
		}
		DataOutputStream dos = new DataOutputStream(stream);
		dos.writeInt(VERSION);
		dos.writeInt(web.getContentWidth());
		dos.writeInt(web.getContentHeight());
		dos.writeInt(draw.mContentSize.x);
		dos.writeInt(draw.mContentSize.y);
		return nativeSerializeViewState(baseLayer, dos,
		new byte[WORKING_STREAM_STORAGE]);
		}

		static DrawData deserializeViewState(InputStream stream, WebViewClassic web)
		static DrawData deserializeViewState(InputStream stream)
		throws IOException {
		DataInputStream dis = new DataInputStream(stream);
		int version = dis.readInt();
		@@ -62,13 +62,10 @@ class ViewStateSerializer {

		final WebViewCore.DrawData draw = new WebViewCore.DrawData();
		draw.mViewState = new WebViewCore.ViewState();
		int viewWidth = web.getViewWidth();
		int viewHeight = web.getViewHeightWithTitle() - web.getTitleHeight();
		draw.mViewSize = new Point(viewWidth, viewHeight);
		draw.mContentSize = new Point(contentWidth, contentHeight);
		draw.mViewState.mDefaultScale = web.getDefaultZoomScale();
		draw.mBaseLayer = baseLayer;
		draw.mInvalRegion = new Region(0, 0, contentWidth, contentHeight);
		stream.close();
		return draw;
		}

core/java/android/webkit/WebViewClassic.java

+36 −19

Original line number	Diff line number	Diff line
		@@ -2439,34 +2439,51 @@ public final class WebViewClassic implements WebViewProvider, WebViewProvider.Sc
		* version specific, and may not be able to be loaded by newer versions
		* of WebView.
		* @param stream The {@link OutputStream} to save to
		* @return True if saved successfully
		* @param callback The {@link ValueCallback} to call with the result
		*/
		public boolean saveViewState(OutputStream stream) {
		try {
		return ViewStateSerializer.serializeViewState(stream, this);
		} catch (IOException e) {
		Log.w(LOGTAG, "Failed to saveViewState", e);
		public void saveViewState(OutputStream stream, ValueCallback<Boolean> callback) {
		if (mWebViewCore == null) {
		callback.onReceiveValue(false);
		return;
		}
		return false;
		mWebViewCore.sendMessageAtFrontOfQueue(EventHub.SAVE_VIEW_STATE,
		new WebViewCore.SaveViewStateRequest(stream, callback));
		}

		/**
		* Loads the view data from the input stream. See
		* {@link #saveViewState(OutputStream)} for more information.
		* @param stream The {@link InputStream} to load from
		* @return True if loaded successfully
		*/
		public boolean loadViewState(InputStream stream) {
		try {
		mLoadedPicture = ViewStateSerializer.deserializeViewState(stream, this);
		public void loadViewState(InputStream stream) {
		mBlockWebkitViewMessages = true;
		new AsyncTask<InputStream, Void, DrawData>() {

		@Override
		protected DrawData doInBackground(InputStream... params) {
		try {
		return ViewStateSerializer.deserializeViewState(params[0]);
		} catch (IOException e) {
		return null;
		}
		}

		@Override
		protected void onPostExecute(DrawData draw) {
		if (draw == null) {
		Log.e(LOGTAG, "Failed to load view state!");
		return;
		}
		int viewWidth = getViewWidth();
		int viewHeight = getViewHeightWithTitle() - getTitleHeight();
		draw.mViewSize = new Point(viewWidth, viewHeight);
		draw.mViewState.mDefaultScale = getDefaultZoomScale();
		mLoadedPicture = draw;
		setNewPicture(mLoadedPicture, true);
		mLoadedPicture.mViewState = null;
		return true;
		} catch (IOException e) {
		Log.w(LOGTAG, "Failed to loadViewState", e);
		}
		return false;

		}.execute(stream);
		}

		/**

core/java/android/webkit/WebViewCore.java

+42 −0

Original line number	Diff line number	Diff line
		@@ -44,6 +44,7 @@ import android.webkit.WebViewInputDispatcher.WebKitCallbacks;

		import junit.framework.Assert;

		import java.io.OutputStream;
		import java.util.ArrayList;
		import java.util.Collection;
		import java.util.Map;
		@@ -1046,6 +1047,15 @@ public final class WebViewCore {
		public int mMatchIndex;
		}

		static class SaveViewStateRequest {
		SaveViewStateRequest(OutputStream s, ValueCallback<Boolean> cb) {
		mStream = s;
		mCallback = cb;
		}
		public OutputStream mStream;
		public ValueCallback<Boolean> mCallback;
		}

		/**
		* @hide
		*/
		@@ -1178,6 +1188,8 @@ public final class WebViewCore {
		static final int KEY_PRESS = 223;
		static final int SET_INITIAL_FOCUS = 224;

		static final int SAVE_VIEW_STATE = 225;

		// Private handler for WebCore messages.
		private Handler mHandler;
		// Message queue for containing messages before the WebCore thread is
		@@ -1752,8 +1764,13 @@ public final class WebViewCore {
		case SET_INITIAL_FOCUS:
		nativeSetInitialFocus(mNativeClass, msg.arg1);
		break;
		case SAVE_VIEW_STATE:
		SaveViewStateRequest request = (SaveViewStateRequest) msg.obj;
		saveViewState(request.mStream, request.mCallback);
		break;
		}
		}

		};
		// Take all queued messages and resend them to the new handler.
		synchronized (this) {
		@@ -2249,6 +2266,31 @@ public final class WebViewCore {
		}
		}

		private void saveViewState(OutputStream stream,
		ValueCallback<Boolean> callback) {
		// TODO: Create a native method to do this better without overloading
		// the draw path (and fix saving <canvas>)
		DrawData draw = new DrawData();
		if (DebugFlags.WEB_VIEW_CORE) Log.v(LOGTAG, "saveViewState start");
		draw.mBaseLayer = nativeRecordContent(mNativeClass, draw.mInvalRegion,
		draw.mContentSize);
		boolean result = false;
		try {
		result = ViewStateSerializer.serializeViewState(stream, draw);
		} catch (Throwable t) {
		Log.w(LOGTAG, "Failed to save view state", t);
		}
		callback.onReceiveValue(result);
		if (draw.mBaseLayer != 0) {
		if (mDrawIsScheduled) {
		mDrawIsScheduled = false;
		mEventHub.removeMessages(EventHub.WEBKIT_DRAW);
		}
		mLastDrawData = draw;
		webkitDraw(draw);
		}
		}

		static void reducePriority() {
		// remove the pending REDUCE_PRIORITY and RESUME_PRIORITY messages
		sWebCoreHandler.removeMessages(WebCoreThread.REDUCE_PRIORITY);