Expand bottom sheet when URL bar is focused

chrome/android/java/src/org/chromium/chrome/browser/widget/BottomSheet.java

Index: chrome/android/java/src/org/chromium/chrome/browser/widget/BottomSheet.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/widget/BottomSheet.java b/chrome/android/java/src/org/chromium/chrome/browser/widget/BottomSheet.java
index 0006219836b57d466c7e94c0250ea1ddcf072c55..2803eaf15c22d83309b2e195f49546711dde237d 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/widget/BottomSheet.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/widget/BottomSheet.java
@@ -232,8 +232,16 @@ public class BottomSheet extends LinearLayout {
         root.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
             public void onLayoutChange(View v, int left, int top, int right, int bottom,
                     int oldLeft, int oldTop, int oldRight, int oldBottom) {
+                // Make sure the size of the layout actually changed.

[gone, 2017/01/20 19:04:08]

Can't you just do equality checks?  Subtraction of two ints and comparing to
zero implies they're the same value, no?

[mdjones, 2017/01/20 20:11:47]

Yeah, not really sure what I was thinking here. Fixed.

+                if (top - oldTop == 0 && bottom - oldBottom == 0 && left - oldLeft == 0
+                        && right - oldRight == 0) {
+                    return;
+                }
+
                 mContainerHeight = bottom - top;
                 updateSheetPeekHeight();
+
+                cancelAnimation();
                 setSheetState(mCurrentState, false);
             }
         });
@@ -242,8 +250,16 @@ public class BottomSheet extends LinearLayout {
         controlContainer.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
             public void onLayoutChange(View v, int left, int top, int right, int bottom,
                     int oldLeft, int oldTop, int oldRight, int oldBottom) {
+                // Make sure the size of the layout actually changed.
+                if (top - oldTop == 0 && bottom - oldBottom == 0 && left - oldLeft == 0
+                        && right - oldRight == 0) {
+                    return;
+                }
+
                 mToolbarHeight = bottom - top;
                 updateSheetPeekHeight();
+
+                cancelAnimation();
                 setSheetState(mCurrentState, false);
             }
         });
@@ -350,7 +366,7 @@ public class BottomSheet extends LinearLayout {
      * @param animate If true, the sheet will animate to the provided state, otherwise it will
      *                move there instantly.
      */
-    private void setSheetState(@SheetState int state, boolean animate) {
+    public void setSheetState(@SheetState int state, boolean animate) {
         mCurrentState = state;
 
         if (animate) {
@@ -361,6 +377,22 @@ public class BottomSheet extends LinearLayout {
     }
 
     /**
+     * @return The current state of the bottom sheet. If the sheet is animating, this will be the
+     *         state the sheet is animating to.
+     */
+    public int getSheetState() {
+        return mCurrentState;
+    }
+
+    /**
+     * If the animation to settle the sheet in one of its states is running.
+     * @return True if the animation is running.
+     */
+    private boolean isRunningSettleAnimation() {
+        return mSettleAnimator != null;
+    }
+
+    /**
      * Gets the height of the bottom sheet based on a provided state.
      * @param state The state to get the height from.
      * @return The height of the sheet at the provided state.