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/*
* Copyright (C) 2017 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.quickstep;
import android.content.Context;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ComposeShader;
import android.graphics.LightingColorFilter;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.Shader;
import android.util.AttributeSet;
import android.view.View;
import com.android.launcher3.DeviceProfile;
import com.android.launcher3.Launcher;
import com.android.launcher3.R;
import com.android.quickstep.TaskOverlayFactory.TaskOverlay;
import com.android.systemui.shared.recents.model.Task;
import com.android.systemui.shared.recents.model.ThumbnailData;
/**
* A task in the Recents view.
*/
public class TaskThumbnailView extends View {
private static final LightingColorFilter[] sDimFilterCache = new LightingColorFilter[256];
private final float mCornerRadius;
private final float mFadeLength;
private final TaskOverlay mOverlay;
private final Paint mPaint = new Paint();
private final Matrix mMatrix = new Matrix();
private ThumbnailData mThumbnailData;
protected BitmapShader mBitmapShader;
private float mDimAlpha = 1f;
public TaskThumbnailView(Context context) {
this(context, null);
}
public TaskThumbnailView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public TaskThumbnailView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mCornerRadius = getResources().getDimension(R.dimen.task_corner_radius);
mFadeLength = getResources().getDimension(R.dimen.task_fade_length);
mOverlay = TaskOverlayFactory.get(context).createOverlay(this);
}
public void bind() {
mOverlay.reset();
}
/**
* Updates this thumbnail.
*/
public void setThumbnail(Task task, ThumbnailData thumbnailData) {
mPaint.setColor(task == null ? Color.BLACK : task.colorBackground | 0xFF000000);
if (thumbnailData != null && thumbnailData.thumbnail != null) {
Bitmap bm = thumbnailData.thumbnail;
bm.prepareToDraw();
mBitmapShader = new BitmapShader(bm, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
mPaint.setShader(mBitmapShader);
mThumbnailData = thumbnailData;
updateThumbnailMatrix();
} else {
mBitmapShader = null;
mThumbnailData = null;
mPaint.setShader(null);
mOverlay.reset();
}
updateThumbnailPaintFilter();
}
/**
* Sets the alpha of the dim layer on top of this view.
*/
public void setDimAlpha(float dimAlpha) {
mDimAlpha = dimAlpha;
updateThumbnailPaintFilter();
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawRoundRect(0, 0, getMeasuredWidth(), getMeasuredHeight(),
mCornerRadius, mCornerRadius, mPaint);
}
private void updateThumbnailPaintFilter() {
int mul = (int) (mDimAlpha * 255);
if (mBitmapShader != null) {
mPaint.setColorFilter(getLightingColorFilter(mul));
} else {
mPaint.setColorFilter(null);
mPaint.setColor(Color.argb(255, mul, mul, mul));
}
invalidate();
}
private void updateThumbnailMatrix() {
if (mBitmapShader != null && mThumbnailData != null) {
float scale = mThumbnailData.scale;
float thumbnailWidth = mThumbnailData.thumbnail.getWidth() -
(mThumbnailData.insets.left + mThumbnailData.insets.right) * scale;
float thumbnailHeight = mThumbnailData.thumbnail.getHeight() -
(mThumbnailData.insets.top + mThumbnailData.insets.bottom) * scale;
final float thumbnailScale;
if (getMeasuredWidth() == 0) {
// If we haven't measured , skip the thumbnail drawing and only draw the background
// color
thumbnailScale = 0f;
} else {
final Configuration configuration =
getContext().getApplicationContext().getResources().getConfiguration();
final DeviceProfile profile = Launcher.getLauncher(getContext()).getDeviceProfile();
if (configuration.orientation == mThumbnailData.orientation) {
// If we are in the same orientation as the screenshot, just scale it to the
// width of the task view
thumbnailScale = getMeasuredWidth() / thumbnailWidth;
} else if (configuration.orientation == Configuration.ORIENTATION_PORTRAIT) {
// Scale the landscape thumbnail up to app size, then scale that to the task
// view size to match other portrait screenshots
thumbnailScale = ((float) getMeasuredWidth() / profile.widthPx);
} else {
// Otherwise, scale the screenshot to fit 1:1 in the current orientation
thumbnailScale = 1;
}
}
mMatrix.setTranslate(-mThumbnailData.insets.left * scale,
-mThumbnailData.insets.top * scale);
mMatrix.postScale(thumbnailScale, thumbnailScale);
mBitmapShader.setLocalMatrix(mMatrix);
float bitmapHeight = Math.max(thumbnailHeight * thumbnailScale, 0);
Shader shader = mBitmapShader;
if (bitmapHeight < getMeasuredHeight()) {
int color = mPaint.getColor();
LinearGradient fade = new LinearGradient(
0, bitmapHeight - mFadeLength, 0, bitmapHeight,
color & 0x00FFFFFF, color, Shader.TileMode.CLAMP);
shader = new ComposeShader(fade, shader, Mode.DST_OVER);
}
float bitmapWidth = Math.max(thumbnailWidth * thumbnailScale, 0);
if (bitmapWidth < getMeasuredWidth()) {
int color = mPaint.getColor();
LinearGradient fade = new LinearGradient(
bitmapWidth - mFadeLength, 0, bitmapWidth, 0,
color & 0x00FFFFFF, color, Shader.TileMode.CLAMP);
shader = new ComposeShader(fade, shader, Mode.DST_OVER);
}
mPaint.setShader(shader);
}
mOverlay.setTaskInfo(mThumbnailData, mMatrix);
invalidate();
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
updateThumbnailMatrix();
}
private static LightingColorFilter getLightingColorFilter(int dimColor) {
if (dimColor < 0) {
dimColor = 0;
} else if (dimColor > 255) {
dimColor = 255;
}
if (sDimFilterCache[dimColor] == null) {
sDimFilterCache[dimColor] =
new LightingColorFilter(Color.argb(255, dimColor, dimColor, dimColor), 0);
}
return sDimFilterCache[dimColor];
}
}
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