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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.launcher3.dragndrop;
import android.annotation.TargetApi;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PixelFormat;
import android.graphics.Point;
import android.graphics.drawable.AdaptiveIconDrawable;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.util.Log;
import com.android.launcher3.Launcher;
import com.android.launcher3.MainThreadExecutor;
import com.android.launcher3.R;
import com.android.launcher3.folder.FolderIcon;
import com.android.launcher3.folder.PreviewBackground;
import com.android.launcher3.icons.BitmapRenderer;
import com.android.launcher3.util.Preconditions;
/**
* {@link AdaptiveIconDrawable} representation of a {@link FolderIcon}
*/
@TargetApi(Build.VERSION_CODES.O)
public class FolderAdaptiveIcon extends AdaptiveIconDrawable {
private static final String TAG = "FolderAdaptiveIcon";
private final Drawable mBadge;
private final Path mMask;
private FolderAdaptiveIcon(Drawable bg, Drawable fg, Drawable badge, Path mask) {
super(bg, fg);
mBadge = badge;
mMask = mask;
}
@Override
public Path getIconMask() {
return mMask;
}
public Drawable getBadge() {
return mBadge;
}
public static FolderAdaptiveIcon createFolderAdaptiveIcon(
Launcher launcher, int folderId, Point dragViewSize) {
Preconditions.assertNonUiThread();
int margin = launcher.getResources()
.getDimensionPixelSize(R.dimen.blur_size_medium_outline);
// Allocate various bitmaps on the background thread, because why not!
final Bitmap badge = Bitmap.createBitmap(
dragViewSize.x - margin, dragViewSize.y - margin, Bitmap.Config.ARGB_8888);
// Create the actual drawable on the UI thread to avoid race conditions with
// FolderIcon draw pass
try {
return new MainThreadExecutor().submit(() -> {
FolderIcon icon = launcher.findFolderIcon(folderId);
return icon == null ? null : createDrawableOnUiThread(icon, badge, dragViewSize);
}).get();
} catch (Exception e) {
Log.e(TAG, "Unable to create folder icon", e);
return null;
}
}
/**
* Initializes various bitmaps on the UI thread and returns the final drawable.
*/
private static FolderAdaptiveIcon createDrawableOnUiThread(FolderIcon icon,
Bitmap badgeBitmap, Point dragViewSize) {
Preconditions.assertUIThread();
float margin = icon.getResources().getDimension(R.dimen.blur_size_medium_outline) / 2;
Canvas c = new Canvas();
PreviewBackground bg = icon.getFolderBackground();
// Initialize badge
c.setBitmap(badgeBitmap);
bg.drawShadow(c);
bg.drawBackgroundStroke(c);
icon.drawBadge(c);
// Initialize preview
final float sizeScaleFactor = 1 + 2 * AdaptiveIconDrawable.getExtraInsetFraction();
final int previewWidth = (int) (dragViewSize.x * sizeScaleFactor);
final int previewHeight = (int) (dragViewSize.y * sizeScaleFactor);
final float shiftFactor = AdaptiveIconDrawable.getExtraInsetFraction() / sizeScaleFactor;
final float previewShiftX = shiftFactor * previewWidth;
final float previewShiftY = shiftFactor * previewHeight;
Bitmap previewBitmap = BitmapRenderer.createHardwareBitmap(previewWidth, previewHeight,
(canvas) -> {
int count = canvas.save();
canvas.translate(previewShiftX, previewShiftY);
icon.getPreviewItemManager().draw(canvas);
canvas.restoreToCount(count);
});
// Initialize mask
Path mask = new Path();
Matrix m = new Matrix();
m.setTranslate(margin, margin);
bg.getClipPath().transform(m, mask);
ShiftedBitmapDrawable badge = new ShiftedBitmapDrawable(badgeBitmap, margin, margin);
ShiftedBitmapDrawable foreground = new ShiftedBitmapDrawable(previewBitmap,
margin - previewShiftX, margin - previewShiftY);
return new FolderAdaptiveIcon(new ColorDrawable(bg.getBgColor()), foreground, badge, mask);
}
/**
* A simple drawable which draws a bitmap at a fixed position irrespective of the bounds
*/
private static class ShiftedBitmapDrawable extends Drawable {
private final Paint mPaint = new Paint(Paint.FILTER_BITMAP_FLAG);
private final Bitmap mBitmap;
private final float mShiftX;
private final float mShiftY;
ShiftedBitmapDrawable(Bitmap bitmap, float shiftX, float shiftY) {
mBitmap = bitmap;
mShiftX = shiftX;
mShiftY = shiftY;
}
@Override
public void draw(Canvas canvas) {
canvas.drawBitmap(mBitmap, mShiftX, mShiftY, mPaint);
}
@Override
public void setAlpha(int i) { }
@Override
public void setColorFilter(ColorFilter colorFilter) {
mPaint.setColorFilter(colorFilter);
}
@Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
}
}
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