Adding margin to Drag layer instead of checking for right insets at every place

Bug: 25692432
Change-Id: I853f41a17c54b30b7772b9fd8556d9465de84752

src/com/android/launcher3/InvariantDeviceProfile.java

@@ -17,7 +17,6 @@
 package com.android.launcher3;
 
 import android.annotation.TargetApi;
-import android.app.ActivityManager;
 import android.content.Context;
 import android.graphics.Point;
 import android.util.DisplayMetrics;
@@ -84,9 +83,6 @@ public class InvariantDeviceProfile {
     DeviceProfile landscapeProfile;
     DeviceProfile portraitProfile;
 
-    // On Marshmallow the status bar is no longer opaque, when drawn on the right.
-    public boolean isRightInsetOpaque;
-
     InvariantDeviceProfile() {
     }
 
@@ -170,9 +166,6 @@ public class InvariantDeviceProfile {
                 largeSide, smallSide, true /* isLandscape */);
         portraitProfile = new DeviceProfile(context, this, smallestSize, largestSize,
                 smallSide, largeSide, false /* isLandscape */);
-
-        isRightInsetOpaque = !Utilities.ATLEAST_MARSHMALLOW ||
-                context.getSystemService(ActivityManager.class).isLowRamDevice();
     }
 
     ArrayList<InvariantDeviceProfile> getPredefinedDeviceProfiles() {

src/com/android/launcher3/LauncherRootView.java

@@ -1,17 +1,22 @@
 package com.android.launcher3;
 
+import android.annotation.TargetApi;
+import android.app.ActivityManager;
 import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.Rect;
 import android.util.AttributeSet;
+import android.view.View;
 
 public class LauncherRootView extends InsettableFrameLayout {
 
     private final Paint mOpaquePaint;
     private boolean mDrawRightInsetBar;
 
+    private View mAlignedView;
+
     public LauncherRootView(Context context, AttributeSet attrs) {
         super(context, attrs);
 
@@ -20,11 +25,33 @@ public class LauncherRootView extends InsettableFrameLayout {
         mOpaquePaint.setStyle(Paint.Style.FILL);
     }
 
+    @Override
+    protected void onFinishInflate() {
+        if (getChildCount() > 0) {
+            // LauncherRootView contains only one child, which should be aligned
+            // based on the horizontal insets.
+            mAlignedView = getChildAt(0);
+        }
+        super.onFinishInflate();
+    }
+
+    @TargetApi(23)
     @Override
     protected boolean fitSystemWindows(Rect insets) {
-        setInsets(insets);
-        mDrawRightInsetBar = mInsets.right > 0 && LauncherAppState
-                .getInstance().getInvariantDeviceProfile().isRightInsetOpaque;
+        mDrawRightInsetBar = insets.right > 0 &&
+                (!Utilities.ATLEAST_MARSHMALLOW ||
+                getContext().getSystemService(ActivityManager.class).isLowRamDevice());
+        setInsets(mDrawRightInsetBar ? new Rect(0, insets.top, 0, insets.bottom) : insets);
+
+        if (mAlignedView != null) {
+            // Apply margins on aligned view to handle left/right insets.
+            MarginLayoutParams lp = (MarginLayoutParams) mAlignedView.getLayoutParams();
+            if (lp.leftMargin != insets.left || lp.rightMargin != insets.right) {
+                lp.leftMargin = insets.left;
+                lp.rightMargin = insets.right;
+                mAlignedView.setLayoutParams(lp);
+            }
+        }
 
         return true; // I'll take it from here
     }

src/com/android/launcher3/PagedView.java

@@ -202,9 +202,6 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
     protected final Rect mInsets = new Rect();
     protected final boolean mIsRtl;
 
-    // When set to true, full screen content and overscroll effect is shited inside by right inset.
-    protected boolean mIgnoreRightInset;
-
     // Edge effect
     private final LauncherEdgeEffect mEdgeGlowLeft = new LauncherEdgeEffect();
     private final LauncherEdgeEffect mEdgeGlowRight = new LauncherEdgeEffect();
@@ -822,8 +819,7 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
                     childWidthMode = MeasureSpec.EXACTLY;
                     childHeightMode = MeasureSpec.EXACTLY;
 
-                    childWidth = getViewportWidth() - mInsets.left
-                            - (mIgnoreRightInset ? mInsets.right : 0);
+                    childWidth = getViewportWidth() - mInsets.left - mInsets.right;
                     childHeight = getViewportHeight();
                 }
                 if (referenceChildWidth == 0) {
@@ -1182,9 +1178,8 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
 
                 getEdgeVerticalPostion(sTmpIntPoint);
 
-                int width = mIgnoreRightInset ? (display.width() - mInsets.right) : display.width();
-                canvas.translate(sTmpIntPoint[0] - display.top, -width);
-                mEdgeGlowRight.setSize(sTmpIntPoint[1] - sTmpIntPoint[0], width);
+                canvas.translate(sTmpIntPoint[0] - display.top, -display.width());
+                mEdgeGlowRight.setSize(sTmpIntPoint[1] - sTmpIntPoint[0], display.width());
                 if (mEdgeGlowRight.draw(canvas)) {
                     postInvalidateOnAnimation();
                 }

src/com/android/launcher3/Workspace.java

@@ -455,7 +455,6 @@ public class Workspace extends PagedView
         setWallpaperDimension();
 
         setEdgeGlowColor(getResources().getColor(R.color.workspace_edge_effect_color));
-        mIgnoreRightInset = app.getInvariantDeviceProfile().isRightInsetOpaque;
     }
 
     private void setupLayoutTransition() {