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/*
* Copyright (C) 2008 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 com.android.browser;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Picture;
import android.util.AttributeSet;
import android.view.View;
import android.webkit.WebView;
import android.widget.ImageView;
import android.util.Log;
/**
* This class is used by ImageAdapter to draw a representation of each tab. It
* overrides ImageView so it can be used for the new tab image as well.
*/
public class FakeWebView extends ImageView {
private TabControl.Tab mTab;
private boolean mUsesResource;
private class Listener implements WebView.PictureListener {
public void onNewPicture(WebView view, Picture p) {
FakeWebView.this.invalidate();
}
};
public FakeWebView(Context context) {
this(context, null);
}
public FakeWebView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public FakeWebView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onDraw(Canvas canvas) {
if (mUsesResource) {
super.onDraw(canvas);
} else {
// Always draw white behind the picture just in case the picture
// draws nothing.
// FIXME: We used to draw white only when the WebView was null but
// sometimes the picture was empty. So now we always draw white. It
// would be nice to know if the picture is empty so we can avoid
// drawing white.
canvas.drawColor(Color.WHITE);
if (mTab != null) {
final WebView w = mTab.getTopWindow();
if (w != null) {
Picture p = w.capturePicture();
if (p != null) {
canvas.save();
float scale = getWidth() * w.getScale() / w.getWidth();
canvas.scale(scale, scale);
canvas.translate(-w.getScrollX(), -w.getScrollY());
canvas.drawPicture(p);
canvas.restore();
}
}
}
}
}
@Override
public void setImageResource(int resId) {
mUsesResource = true;
mTab = null;
super.setImageResource(resId);
}
/**
* Set a WebView for this FakeWebView to represent.
* @param v WebView whose picture and other data will be used in onDraw.
*/
public void setTab(TabControl.Tab t) {
mUsesResource = false;
mTab = t;
if (t != null && t.getWebView() != null) {
Listener l = new Listener();
t.getWebView().setPictureListener(l);
if (t.getSubWebView() != null) {
t.getSubWebView().setPictureListener(l);
}
}
}
}
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