| /* |
| * Copyright (C) 2014 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.systemui.recents.views; |
| |
| import android.app.ActivityManager; |
| import android.content.Context; |
| import android.content.res.Configuration; |
| import android.content.res.Resources; |
| import android.graphics.Bitmap; |
| import android.graphics.BitmapShader; |
| import android.graphics.Canvas; |
| import android.graphics.Color; |
| import android.graphics.ColorMatrix; |
| import android.graphics.ColorMatrixColorFilter; |
| import android.graphics.LightingColorFilter; |
| import android.graphics.Matrix; |
| import android.graphics.Paint; |
| import android.graphics.Rect; |
| import android.graphics.Shader; |
| import android.util.AttributeSet; |
| import android.view.View; |
| import android.view.ViewDebug; |
| |
| import com.android.systemui.R; |
| import com.android.systemui.recents.events.EventBus; |
| import com.android.systemui.recents.events.EventBus.Event; |
| import com.android.systemui.recents.events.ui.TaskSnapshotChangedEvent; |
| import com.android.systemui.recents.misc.Utilities; |
| import com.android.systemui.recents.model.Task; |
| import com.android.systemui.recents.model.ThumbnailData; |
| import java.io.PrintWriter; |
| |
| |
| /** |
| * The task thumbnail view. It implements an image view that allows for animating the dim and |
| * alpha of the thumbnail image. |
| */ |
| public class TaskViewThumbnail extends View { |
| |
| private static final ColorMatrix TMP_FILTER_COLOR_MATRIX = new ColorMatrix(); |
| private static final ColorMatrix TMP_BRIGHTNESS_COLOR_MATRIX = new ColorMatrix(); |
| |
| private Task mTask; |
| |
| private int mDisplayOrientation = Configuration.ORIENTATION_UNDEFINED; |
| private Rect mDisplayRect = new Rect(); |
| |
| // Drawing |
| @ViewDebug.ExportedProperty(category="recents") |
| protected Rect mTaskViewRect = new Rect(); |
| @ViewDebug.ExportedProperty(category="recents") |
| protected Rect mThumbnailRect = new Rect(); |
| @ViewDebug.ExportedProperty(category="recents") |
| protected float mThumbnailScale; |
| private float mFullscreenThumbnailScale; |
| /** The height, in pixels, of the task view's title bar. */ |
| private int mTitleBarHeight; |
| private boolean mSizeToFit = false; |
| private boolean mOverlayHeaderOnThumbnailActionBar = true; |
| private ThumbnailData mThumbnailData; |
| |
| protected int mCornerRadius; |
| @ViewDebug.ExportedProperty(category="recents") |
| private float mDimAlpha; |
| private Matrix mMatrix = new Matrix(); |
| private Paint mDrawPaint = new Paint(); |
| protected Paint mLockedPaint = new Paint(); |
| protected Paint mBgFillPaint = new Paint(); |
| protected BitmapShader mBitmapShader; |
| protected boolean mUserLocked = false; |
| private LightingColorFilter mLightingColorFilter = new LightingColorFilter(0xffffffff, 0); |
| |
| // Clip the top of the thumbnail against the opaque header bar that overlaps this view |
| private View mTaskBar; |
| |
| // Visibility optimization, if the thumbnail height is less than the height of the header |
| // bar for the task view, then just mark this thumbnail view as invisible |
| @ViewDebug.ExportedProperty(category="recents") |
| private boolean mInvisible; |
| |
| @ViewDebug.ExportedProperty(category="recents") |
| private boolean mDisabledInSafeMode; |
| |
| public TaskViewThumbnail(Context context) { |
| this(context, null); |
| } |
| |
| public TaskViewThumbnail(Context context, AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public TaskViewThumbnail(Context context, AttributeSet attrs, int defStyleAttr) { |
| this(context, attrs, defStyleAttr, 0); |
| } |
| |
| public TaskViewThumbnail(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { |
| super(context, attrs, defStyleAttr, defStyleRes); |
| mDrawPaint.setColorFilter(mLightingColorFilter); |
| mDrawPaint.setFilterBitmap(true); |
| mDrawPaint.setAntiAlias(true); |
| Resources res = getResources(); |
| mCornerRadius = res.getDimensionPixelSize(R.dimen.recents_task_view_rounded_corners_radius); |
| mBgFillPaint.setColor(Color.WHITE); |
| mLockedPaint.setColor(Color.WHITE); |
| if (ActivityManager.ENABLE_TASK_SNAPSHOTS) { |
| mFullscreenThumbnailScale = 1f; |
| } else { |
| mFullscreenThumbnailScale = res.getFraction( |
| com.android.internal.R.fraction.thumbnail_fullscreen_scale, 1, 1); |
| } |
| mTitleBarHeight = res.getDimensionPixelSize(R.dimen.recents_grid_task_view_header_height); |
| } |
| |
| /** |
| * Called when the task view frame changes, allowing us to move the contents of the header |
| * to match the frame changes. |
| */ |
| public void onTaskViewSizeChanged(int width, int height) { |
| // Return early if the bounds have not changed |
| if (mTaskViewRect.width() == width && mTaskViewRect.height() == height) { |
| return; |
| } |
| |
| mTaskViewRect.set(0, 0, width, height); |
| setLeftTopRightBottom(0, 0, width, height); |
| updateThumbnailMatrix(); |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| if (mInvisible) { |
| return; |
| } |
| |
| int viewWidth = mTaskViewRect.width(); |
| int viewHeight = mTaskViewRect.height(); |
| int thumbnailWidth = Math.min(viewWidth, |
| (int) (mThumbnailRect.width() * mThumbnailScale)); |
| int thumbnailHeight = Math.min(viewHeight, |
| (int) (mThumbnailRect.height() * mThumbnailScale)); |
| |
| if (mUserLocked) { |
| canvas.drawRoundRect(0, 0, viewWidth, viewHeight, mCornerRadius, mCornerRadius, |
| mLockedPaint); |
| } else if (mBitmapShader != null && thumbnailWidth > 0 && thumbnailHeight > 0) { |
| int topOffset = 0; |
| if (mTaskBar != null && mOverlayHeaderOnThumbnailActionBar) { |
| topOffset = mTaskBar.getHeight() - mCornerRadius; |
| } |
| |
| // Draw the background, there will be some small overdraw with the thumbnail |
| if (thumbnailWidth < viewWidth) { |
| // Portrait thumbnail on a landscape task view |
| canvas.drawRoundRect(Math.max(0, thumbnailWidth - mCornerRadius), topOffset, |
| viewWidth, viewHeight, |
| mCornerRadius, mCornerRadius, mBgFillPaint); |
| } |
| if (thumbnailHeight < viewHeight) { |
| // Landscape thumbnail on a portrait task view |
| canvas.drawRoundRect(0, Math.max(topOffset, thumbnailHeight - mCornerRadius), |
| viewWidth, viewHeight, |
| mCornerRadius, mCornerRadius, mBgFillPaint); |
| } |
| |
| // Draw the thumbnail |
| canvas.drawRoundRect(0, topOffset, thumbnailWidth, thumbnailHeight, |
| mCornerRadius, mCornerRadius, mDrawPaint); |
| } else { |
| canvas.drawRoundRect(0, 0, viewWidth, viewHeight, mCornerRadius, mCornerRadius, |
| mBgFillPaint); |
| } |
| } |
| |
| /** Sets the thumbnail to a given bitmap. */ |
| void setThumbnail(ThumbnailData thumbnailData) { |
| if (thumbnailData != null && thumbnailData.thumbnail != null) { |
| Bitmap bm = thumbnailData.thumbnail; |
| bm.prepareToDraw(); |
| mBitmapShader = new BitmapShader(bm, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP); |
| mDrawPaint.setShader(mBitmapShader); |
| mThumbnailRect.set(0, 0, |
| bm.getWidth() - thumbnailData.insets.left - thumbnailData.insets.right, |
| bm.getHeight() - thumbnailData.insets.top - thumbnailData.insets.bottom); |
| mThumbnailData = thumbnailData; |
| updateThumbnailMatrix(); |
| updateThumbnailPaintFilter(); |
| } else { |
| mBitmapShader = null; |
| mDrawPaint.setShader(null); |
| mThumbnailRect.setEmpty(); |
| mThumbnailData = null; |
| } |
| } |
| |
| /** Updates the paint to draw the thumbnail. */ |
| void updateThumbnailPaintFilter() { |
| if (mInvisible) { |
| return; |
| } |
| int mul = (int) ((1.0f - mDimAlpha) * 255); |
| if (mBitmapShader != null) { |
| if (mDisabledInSafeMode) { |
| // Brightness: C-new = C-old*(1-amount) + amount |
| TMP_FILTER_COLOR_MATRIX.setSaturation(0); |
| float scale = 1f - mDimAlpha; |
| float[] mat = TMP_BRIGHTNESS_COLOR_MATRIX.getArray(); |
| mat[0] = scale; |
| mat[6] = scale; |
| mat[12] = scale; |
| mat[4] = mDimAlpha * 255f; |
| mat[9] = mDimAlpha * 255f; |
| mat[14] = mDimAlpha * 255f; |
| TMP_FILTER_COLOR_MATRIX.preConcat(TMP_BRIGHTNESS_COLOR_MATRIX); |
| ColorMatrixColorFilter filter = new ColorMatrixColorFilter(TMP_FILTER_COLOR_MATRIX); |
| mDrawPaint.setColorFilter(filter); |
| mBgFillPaint.setColorFilter(filter); |
| mLockedPaint.setColorFilter(filter); |
| } else { |
| mLightingColorFilter.setColorMultiply(Color.argb(255, mul, mul, mul)); |
| mDrawPaint.setColorFilter(mLightingColorFilter); |
| mDrawPaint.setColor(0xFFffffff); |
| mBgFillPaint.setColorFilter(mLightingColorFilter); |
| mLockedPaint.setColorFilter(mLightingColorFilter); |
| } |
| } else { |
| int grey = mul; |
| mDrawPaint.setColorFilter(null); |
| mDrawPaint.setColor(Color.argb(255, grey, grey, grey)); |
| } |
| if (!mInvisible) { |
| invalidate(); |
| } |
| } |
| |
| /** |
| * Updates the scale of the bitmap relative to this view. |
| */ |
| public void updateThumbnailMatrix() { |
| mThumbnailScale = 1f; |
| if (mBitmapShader != null && mThumbnailData != null) { |
| // We consider this a stack task if it is not freeform (ie. has no bounds) or has been |
| // dragged into the stack from the freeform workspace |
| boolean isStackTask = !mTask.isFreeformTask() || mTask.bounds == null; |
| int xOffset, yOffset = 0; |
| if (mTaskViewRect.isEmpty()) { |
| // If we haven't measured , skip the thumbnail drawing and only draw the background |
| // color |
| mThumbnailScale = 0f; |
| } else if (mSizeToFit) { |
| // Make sure we fill the entire space regardless of the orientation. |
| float viewAspectRatio = (float) mTaskViewRect.width() / |
| (float) (mTaskViewRect.height() - mTitleBarHeight); |
| float thumbnailAspectRatio = |
| (float) mThumbnailRect.width() / (float) mThumbnailRect.height(); |
| if (viewAspectRatio > thumbnailAspectRatio) { |
| mThumbnailScale = |
| (float) mTaskViewRect.width() / (float) mThumbnailRect.width(); |
| } else { |
| mThumbnailScale = (float) (mTaskViewRect.height() - mTitleBarHeight) |
| / (float) mThumbnailRect.height(); |
| } |
| } else if (isStackTask) { |
| float invThumbnailScale = 1f / mFullscreenThumbnailScale; |
| if (mDisplayOrientation == Configuration.ORIENTATION_PORTRAIT) { |
| if (mThumbnailData.orientation == Configuration.ORIENTATION_PORTRAIT) { |
| // If we are in the same orientation as the screenshot, just scale it to the |
| // width of the task view |
| mThumbnailScale = (float) mTaskViewRect.width() / mThumbnailRect.width(); |
| } else { |
| // Scale the landscape thumbnail up to app size, then scale that to the task |
| // view size to match other portrait screenshots |
| mThumbnailScale = invThumbnailScale * |
| ((float) mTaskViewRect.width() / mDisplayRect.width()); |
| } |
| } else { |
| // Otherwise, scale the screenshot to fit 1:1 in the current orientation |
| mThumbnailScale = invThumbnailScale; |
| } |
| } else { |
| // Otherwise, if this is a freeform task with task bounds, then scale the thumbnail |
| // to fit the entire bitmap into the task bounds |
| mThumbnailScale = Math.min( |
| (float) mTaskViewRect.width() / mThumbnailRect.width(), |
| (float) mTaskViewRect.height() / mThumbnailRect.height()); |
| } |
| mMatrix.setTranslate(-mThumbnailData.insets.left, -mThumbnailData.insets.top); |
| mMatrix.postScale(mThumbnailScale, mThumbnailScale); |
| mBitmapShader.setLocalMatrix(mMatrix); |
| } |
| if (!mInvisible) { |
| invalidate(); |
| } |
| } |
| |
| /** Sets whether the thumbnail should be resized to fit the task view in all orientations. */ |
| public void setSizeToFit(boolean flag) { |
| mSizeToFit = flag; |
| } |
| |
| /** |
| * Sets whether the header should overlap (and hide) the action bar in the thumbnail, or |
| * be stacked just above it. |
| */ |
| public void setOverlayHeaderOnThumbnailActionBar(boolean flag) { |
| mOverlayHeaderOnThumbnailActionBar = flag; |
| } |
| |
| /** Updates the clip rect based on the given task bar. */ |
| void updateClipToTaskBar(View taskBar) { |
| mTaskBar = taskBar; |
| invalidate(); |
| } |
| |
| /** Updates the visibility of the the thumbnail. */ |
| void updateThumbnailVisibility(int clipBottom) { |
| boolean invisible = mTaskBar != null && (getHeight() - clipBottom) <= mTaskBar.getHeight(); |
| if (invisible != mInvisible) { |
| mInvisible = invisible; |
| if (!mInvisible) { |
| updateThumbnailPaintFilter(); |
| } |
| } |
| } |
| |
| /** |
| * Sets the dim alpha, only used when we are not using hardware layers. |
| * (see RecentsConfiguration.useHardwareLayers) |
| */ |
| public void setDimAlpha(float dimAlpha) { |
| mDimAlpha = dimAlpha; |
| updateThumbnailPaintFilter(); |
| } |
| |
| /** |
| * Returns the {@link Paint} used to draw a task screenshot, or {@link #mLockedPaint} if the |
| * thumbnail shouldn't be drawn because it belongs to a locked user. |
| */ |
| protected Paint getDrawPaint() { |
| if (mUserLocked) { |
| return mLockedPaint; |
| } |
| return mDrawPaint; |
| } |
| |
| /** |
| * Binds the thumbnail view to the task. |
| */ |
| void bindToTask(Task t, boolean disabledInSafeMode, int displayOrientation, Rect displayRect) { |
| mTask = t; |
| mDisabledInSafeMode = disabledInSafeMode; |
| mDisplayOrientation = displayOrientation; |
| mDisplayRect.set(displayRect); |
| if (t.colorBackground != 0) { |
| mBgFillPaint.setColor(t.colorBackground); |
| } |
| if (t.colorPrimary != 0) { |
| mLockedPaint.setColor(t.colorPrimary); |
| } |
| mUserLocked = t.isLocked; |
| EventBus.getDefault().register(this); |
| } |
| |
| /** |
| * Called when the bound task's data has loaded and this view should update to reflect the |
| * changes. |
| */ |
| void onTaskDataLoaded(ThumbnailData thumbnailData) { |
| setThumbnail(thumbnailData); |
| } |
| |
| /** Unbinds the thumbnail view from the task */ |
| void unbindFromTask() { |
| mTask = null; |
| setThumbnail(null); |
| EventBus.getDefault().unregister(this); |
| } |
| |
| public final void onBusEvent(TaskSnapshotChangedEvent event) { |
| if (mTask == null || event.taskId != mTask.key.id || event.taskSnapshot == null) { |
| return; |
| } |
| setThumbnail(ThumbnailData.createFromTaskSnapshot(event.taskSnapshot)); |
| } |
| |
| public void dump(String prefix, PrintWriter writer) { |
| String innerPrefix = prefix + " "; |
| |
| writer.print(prefix); writer.print("TaskViewThumbnail"); |
| writer.print(" mTaskViewRect="); writer.print(Utilities.dumpRect(mTaskViewRect)); |
| writer.print(" mThumbnailRect="); writer.print(Utilities.dumpRect(mThumbnailRect)); |
| writer.print(" mThumbnailScale="); writer.print(mThumbnailScale); |
| writer.print(" mDimAlpha="); writer.print(mDimAlpha); |
| writer.println(); |
| } |
| } |