Launcher state management cleanup

> Removing Widgets and related states
> Fixing different durations being used when opening/closing all-apps
> Removing some unnecessary object allocations when changing state without animation
> Differentiating widget bootm sheel and full sheet in logs

Bug: 67678570
Change-Id: Ic169528736d04ee0b38564b4f96595ba066eabda

1 files changed, 90 insertions, 0 deletions

diff --git a/src/com/android/launcher3/dragndrop/PageCutOutScrimDrawable.java b/src/com/android/launcher3/dragndrop/PageCutOutScrimDrawable.java
new file mode 100644
index 000000000..367124b5d
--- /dev/null
+++ b/src/com/android/launcher3/dragndrop/PageCutOutScrimDrawable.java
@@ -0,0 +1,90 @@
+/*
+ * 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.graphics.Canvas;
+import android.graphics.ColorFilter;
+import android.graphics.PixelFormat;
+import android.graphics.Rect;
+import android.graphics.Region;
+import android.graphics.drawable.Drawable;
+import android.support.v4.graphics.ColorUtils;
+
+import com.android.launcher3.CellLayout;
+import com.android.launcher3.Launcher;
+import com.android.launcher3.dynamicui.WallpaperColorInfo;
+
+/**
+ * Scrim drawable which draws a hole for the current drop target page.
+ */
+public class PageCutOutScrimDrawable extends Drawable {
+
+    private final Rect mHighlightRect = new Rect();
+    private final DragLayer mDragLayer;
+    private final Launcher mLauncher;
+    private final WallpaperColorInfo mWallpaperColorInfo;
+
+    private int mAlpha = 0;
+
+    public PageCutOutScrimDrawable(DragLayer dragLayer) {
+        mDragLayer = dragLayer;
+        mLauncher = Launcher.getLauncher(mDragLayer.getContext());
+        mWallpaperColorInfo = WallpaperColorInfo.getInstance(mLauncher);
+    }
+
+    @Override
+    public void draw(Canvas canvas) {
+        // Draw the background below children.
+        if (mAlpha > 0) {
+            // Update the scroll position first to ensure scrim cutout is in the right place.
+            mLauncher.getWorkspace().computeScrollWithoutInvalidation();
+            CellLayout currCellLayout = mLauncher.getWorkspace().getCurrentDragOverlappingLayout();
+            canvas.save();
+            if (currCellLayout != null && currCellLayout != mLauncher.getHotseat().getLayout()) {
+                // Cut a hole in the darkening scrim on the page that should be highlighted, if any.
+                mDragLayer.getDescendantRectRelativeToSelf(currCellLayout, mHighlightRect);
+                canvas.clipRect(mHighlightRect, Region.Op.DIFFERENCE);
+            }
+            // for super light wallpaper it needs to be darken for contrast to workspace
+            // for dark wallpapers the text is white so darkening works as well
+            int color = ColorUtils.compositeColors(0x66000000, mWallpaperColorInfo.getMainColor());
+            canvas.drawColor(ColorUtils.setAlphaComponent(color, mAlpha));
+            canvas.restore();
+        }
+    }
+
+    @Override
+    public void setAlpha(int alpha) {
+        if (mAlpha != alpha) {
+            mAlpha = alpha;
+            invalidateSelf();
+        }
+    }
+
+    @Override
+    public int getAlpha() {
+        return mAlpha;
+    }
+
+    @Override
+    public void setColorFilter(ColorFilter colorFilter) { }
+
+    @Override
+    public int getOpacity() {
+        return PixelFormat.TRANSLUCENT;
+    }
+}