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/*
* Copyright (c) 2015, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of The Linux Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.android.browser;
import android.graphics.Bitmap;
import android.util.SparseArray;
import android.webkit.ValueCallback;
public class EdgeSwipeModel {
private SparseArray<Bitmap> mBitmaps;
private Tab mTab;
private TitleBar mBar;
private static final int mMinProgress = 85;
private static final int mMaxBitmaps = 5;
public EdgeSwipeModel(Tab tab, TitleBar bar) {
mTab = tab;
mBar = bar;
mBitmaps = new SparseArray<>();
}
public void updateSnapshot(final int index) {
if (mBitmaps.get(index) != null) {
return;
}
int captureIndex = mTab.getCaptureIndex(index);
boolean bitmapExists = mTab.getWebView().hasSnapshot(captureIndex);
if (!mTab.isFirstVisualPixelPainted()) {
fetchSnapshot(index);
return;
}
int progress = mBar.getProgressView().getProgressPercent();
if (bitmapExists && progress < mMinProgress) {
fetchSnapshot(index);
return;
}
mTab.getWebView().captureSnapshot(captureIndex,
new ValueCallback<Bitmap>() {
@Override
public void onReceiveValue(Bitmap value) {
mBitmaps.put(index, value);
}
}
);
}
public void fetchSnapshot(final int index) {
if (mBitmaps.get(index) != null) {
return;
}
int captureIndex = mTab.getCaptureIndex(index);
mTab.getWebView().getSnapshot(captureIndex,
new ValueCallback<Bitmap>() {
@Override
public void onReceiveValue(Bitmap bitmap) {
mBitmaps.put(index, bitmap);
}
}
);
}
public Bitmap readSnapshot(int index) {
if (index < 0) {
return null;
}
if (index > (mTab.getWebView().copyBackForwardList().getSize() - 1)) {
return null;
}
return mBitmaps.get(index);
}
public void deleteSnapshot(int index) {
mBitmaps.delete(index);
}
public void cleanup() {
mBitmaps.clear();
}
}
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