[Android] Supporting floating select ActionModes for web content

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
index 9920c9d9da33889d487627919b5275260cf1aab6..29147ecc0c50e9542b2ea3b15d4dd1bab619d011 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
@@ -29,6 +29,7 @@ import android.text.Selection;
 import android.text.TextUtils;
 import android.util.Pair;
 import android.util.TypedValue;
+import android.view.ActionMode;
 import android.view.HapticFeedbackConstants;
 import android.view.InputDevice;
 import android.view.KeyEvent;
@@ -519,6 +520,7 @@ public class ContentViewCore implements
     // whether the last selected text is still highlighted.
     private boolean mHasSelection;
     private boolean mHasInsertion;
+    private boolean mDraggingSelection;
     private String mLastSelectedText;
     private boolean mFocusedNodeEditable;
     private WebActionMode mActionMode;
@@ -1273,6 +1275,7 @@ public class ContentViewCore implements
             mGestureStateListenersIterator.next().onFlingStartGesture(
                     vx, vy, computeVerticalScrollOffset(), computeVerticalScrollExtent());
         }
+        updateActionModeVisibility();
     }
 
     @SuppressWarnings("unused")
@@ -1294,6 +1297,7 @@ public class ContentViewCore implements
         hidePastePopup();
         mZoomControlsDelegate.invokeZoomPicker();
         updateGestureStateListener(GestureEventType.SCROLL_START);
+        updateActionModeVisibility();
     }
 
     @SuppressWarnings("unused")
@@ -1312,6 +1316,7 @@ public class ContentViewCore implements
         if (!mTouchScrollInProgress) return;
         mTouchScrollInProgress = false;
         updateGestureStateListener(GestureEventType.SCROLL_END);
+        updateActionModeVisibility();
     }
 
     @SuppressWarnings("unused")
@@ -1678,6 +1683,7 @@ public class ContentViewCore implements
      */
     public void onWindowFocusChanged(boolean hasWindowFocus) {
         if (!hasWindowFocus) resetGestureDetection();
+        if (mActionMode != null) mActionMode.onWindowFocusChanged(hasWindowFocus);
     }
 
     public void onFocusChanged(boolean gainFocus) {
@@ -2120,7 +2126,10 @@ public class ContentViewCore implements
 
                 @Override
                 public void onGetContentRect(Rect outRect) {
+                    // The selection coordinates are relative to the content viewport, but we need
+                    // coordinates relative to the containing View.
                     outRect.set(mSelectionRect);
+                    outRect.offset(0, (int) mRenderCoordinates.getContentOffsetYPix());
                 }
 
                 @Override
@@ -2150,15 +2159,9 @@ public class ContentViewCore implements
         // On ICS, startActionMode throws an NPE when getParent() is null.
         if (mContainerView.getParent() != null) {
             assert mWebContents != null;
-            boolean tryCreateFloatingActionMode = supportsFloatingActionMode();
-            mActionMode = getContentViewClient().startActionMode(
-                    mContainerView, mActionHandler, tryCreateFloatingActionMode);
-            if (tryCreateFloatingActionMode && mActionMode == null) {
-                mFloatingActionModeCreationFailed = true;
-                if (!allowFallbackIfFloatingActionModeCreationFails) return;
-                mActionMode = getContentViewClient().startActionMode(
-                        mContainerView, mActionHandler, false);
-            }
+            ActionMode actionMode =
+                    startActionMode(allowFallbackIfFloatingActionModeCreationFails);
+            if (actionMode != null) mActionMode = new WebActionMode(actionMode, mContainerView);
         }
         mUnselectAllOnActionModeDismiss = true;
         if (mActionMode == null) {
@@ -2170,14 +2173,41 @@ public class ContentViewCore implements
     }
 
     private boolean supportsFloatingActionMode() {
-        return !mFloatingActionModeCreationFailed
-                && getContentViewClient().supportsFloatingActionMode();
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) return false;
+        return !mFloatingActionModeCreationFailed;
+    }
+
+    private ActionMode startActionMode(boolean allowFallbackIfFloatingActionModeCreationFails) {
+        WebActionModeCallback callback = getContentViewClient().getWebActionModeCallback(
+                mContainerView.getContext(), mActionHandler);
+        if (supportsFloatingActionMode()) {
+            ActionMode actionMode = startFloatingActionMode(callback);
+            if (actionMode != null) return actionMode;
+            mFloatingActionModeCreationFailed = true;
+            if (!allowFallbackIfFloatingActionModeCreationFails) return null;
+        }
+        return startDefaultActionMode(callback);
+    }
+
+    private ActionMode startDefaultActionMode(WebActionModeCallback callback) {
+        return mContainerView.startActionMode(callback);
+    }
+
+    @TargetApi(Build.VERSION_CODES.M)
+    private ActionMode startFloatingActionMode(WebActionModeCallback callback) {
+        ActionMode.Callback2 callback2 = new FloatingWebActionModeCallback(callback);
+        return mContainerView.startActionMode(callback2, ActionMode.TYPE_FLOATING);
     }
 
     private void invalidateActionModeContentRect() {
         if (mActionMode != null) mActionMode.invalidateContentRect();
     }
 
+    private void updateActionModeVisibility() {
+        if (mActionMode == null) return;
+        mActionMode.hide(mDraggingSelection || isScrollInProgress());
+    }
+
     /**
      * Clears the current text selection.
      */
@@ -2234,15 +2264,20 @@ public class ContentViewCore implements
 
             case SelectionEventType.SELECTION_HANDLES_CLEARED:
                 mHasSelection = false;
+                mDraggingSelection = false;
                 mUnselectAllOnActionModeDismiss = false;
                 hideSelectActionMode();
                 mSelectionRect.setEmpty();
                 break;
 
             case SelectionEventType.SELECTION_HANDLE_DRAG_STARTED:
+                mDraggingSelection = true;
+                updateActionModeVisibility();
                 break;
 
             case SelectionEventType.SELECTION_HANDLE_DRAG_STOPPED:
+                mDraggingSelection = false;
+                updateActionModeVisibility();
                 break;
 
             case SelectionEventType.INSERTION_HANDLE_SHOWN:
@@ -3156,6 +3191,7 @@ public class ContentViewCore implements
 
         if (touchScrollInProgress) updateGestureStateListener(GestureEventType.SCROLL_END);
         if (potentiallyActiveFlingCount > 0) updateGestureStateListener(GestureEventType.FLING_END);
+        updateActionModeVisibility();
     }
 
     private float getWheelScrollFactorInPixels() {
@@ -3192,6 +3228,7 @@ public class ContentViewCore implements
         if (mPotentiallyActiveFlingCount <= 0) return;
         mPotentiallyActiveFlingCount--;
         updateGestureStateListener(GestureEventType.FLING_END);
+        updateActionModeVisibility();
     }
 
     @Override