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/*
* Copyright (C) 2010 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 org.mozilla.gecko.toolbar;
import android.support.v4.content.ContextCompat;
import org.mozilla.gecko.AppConstants.Versions;
import org.mozilla.gecko.R;
import org.mozilla.gecko.widget.themed.ThemedImageView;
import org.mozilla.gecko.util.WeakReferenceHandler;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffColorFilter;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.View;
import android.view.animation.Animation;
/**
* Progress view used for page loads.
*
* Because we're given limited information about the page load progress, the
* bar also includes incremental animation between each step to improve
* perceived performance.
*/
public class ToolbarProgressView extends ThemedImageView {
private static final int MAX_PROGRESS = 10000;
private static final int MSG_UPDATE = 0;
private static final int MSG_HIDE = 1;
private static final int STEPS = 10;
private static final int DELAY = 40;
private int mTargetProgress;
private int mIncrement;
private Rect mBounds;
private Handler mHandler;
private int mCurrentProgress;
private PorterDuffColorFilter mPrivateBrowsingColorFilter;
public ToolbarProgressView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context);
}
public ToolbarProgressView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
private void init(Context ctx) {
mBounds = new Rect(0, 0, 0, 0);
mTargetProgress = 0;
mPrivateBrowsingColorFilter = new PorterDuffColorFilter(
ContextCompat.getColor(ctx, R.color.private_browsing_purple), PorterDuff.Mode.SRC_IN);
mHandler = new ToolbarProgressHandler(this);
}
@Override
public void onLayout(boolean f, int l, int t, int r, int b) {
mBounds.left = 0;
mBounds.right = (r - l) * mCurrentProgress / MAX_PROGRESS;
mBounds.top = 0;
mBounds.bottom = b - t;
}
@Override
public void onDraw(Canvas canvas) {
final Drawable d = getDrawable();
d.setBounds(mBounds);
d.draw(canvas);
}
/**
* Immediately sets the progress bar to the given progress percentage.
*
* @param progress Percentage (0-100) to which progress bar should be set
*/
void setProgress(int progressPercentage) {
mCurrentProgress = mTargetProgress = getAbsoluteProgress(progressPercentage);
updateBounds();
clearMessages();
}
/**
* Animates the progress bar from the current progress value to the given
* progress percentage.
*
* @param progress Percentage (0-100) to which progress bar should be animated
*/
void animateProgress(int progressPercentage) {
final int absoluteProgress = getAbsoluteProgress(progressPercentage);
if (absoluteProgress <= mTargetProgress) {
// After we manually click stop, we can still receive page load
// events (e.g., DOMContentLoaded). Updating for other updates
// after a STOP event can freeze the progress bar, so guard against
// that here.
return;
}
mTargetProgress = absoluteProgress;
mIncrement = (mTargetProgress - mCurrentProgress) / STEPS;
clearMessages();
mHandler.sendEmptyMessage(MSG_UPDATE);
}
private void clearMessages() {
mHandler.removeMessages(MSG_UPDATE);
mHandler.removeMessages(MSG_HIDE);
}
private int getAbsoluteProgress(int progressPercentage) {
if (progressPercentage < 0) {
return 0;
}
if (progressPercentage > 100) {
return 100;
}
return progressPercentage * MAX_PROGRESS / 100;
}
private void updateBounds() {
mBounds.right = getWidth() * mCurrentProgress / MAX_PROGRESS;
invalidate();
}
@Override
public void setPrivateMode(final boolean isPrivate) {
super.setPrivateMode(isPrivate);
// Note: android:tint is better but ColorStateLists are not supported until API 21.
if (isPrivate) {
setColorFilter(mPrivateBrowsingColorFilter);
} else {
clearColorFilter();
}
}
private static class ToolbarProgressHandler extends WeakReferenceHandler<ToolbarProgressView> {
public ToolbarProgressHandler(final ToolbarProgressView that) {
super(that);
}
@Override
public void handleMessage(Message msg) {
final ToolbarProgressView that = mTarget.get();
if (that == null) {
return;
}
switch (msg.what) {
case MSG_UPDATE:
that.mCurrentProgress = Math.min(that.mTargetProgress, that.mCurrentProgress + that.mIncrement);
that.updateBounds();
if (that.mCurrentProgress < that.mTargetProgress) {
final int delay = (that.mTargetProgress < MAX_PROGRESS) ? DELAY : DELAY / 4;
sendMessageDelayed(that.mHandler.obtainMessage(msg.what), delay);
} else if (that.mCurrentProgress == MAX_PROGRESS) {
sendMessageDelayed(that.mHandler.obtainMessage(MSG_HIDE), DELAY);
}
break;
case MSG_HIDE:
that.setVisibility(View.GONE);
break;
}
}
};
}
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