Fix bug #7381967 Add RTL APIs to ViewParent

- add RTL apis to ViewParent
- remove awful and performance bottleneck casts in View during LayoutDirection,
TextDirection and TextAlignment resolutions.

Change-Id: I92a56b16382e13c28c1dad35f6f205620eb01bfe

1 files changed, 101 insertions, 0 deletions

diff --git a/core/java/android/view/ViewParent.java b/core/java/android/view/ViewParent.java
index ddff91d..4b70bc0 100644
--- a/core/java/android/view/ViewParent.java
+++ b/core/java/android/view/ViewParent.java
@@ -295,4 +295,105 @@ public interface ViewParent {
      * @hide
      */
     public void childAccessibilityStateChanged(View child);
+
+    /**
+     * Tells if this view parent can resolve the layout direction.
+     * See {@link View#setLayoutDirection(int)}
+     *
+     * @return True if this view parent can resolve the layout direction.
+     *
+     * @hide
+     */
+    public boolean canResolveLayoutDirection();
+
+    /**
+     * Tells if this view parent layout direction is resolved.
+     * See {@link View#setLayoutDirection(int)}
+     *
+     * @return True if this view parent layout direction is resolved.
+     *
+     * @hide
+     */
+    public boolean isLayoutDirectionResolved();
+
+    /**
+     * Return this view parent layout direction. See {@link View#getLayoutDirection()}
+     *
+     * @return {@link View#LAYOUT_DIRECTION_RTL} if the layout direction is RTL or returns
+     * {@link View#LAYOUT_DIRECTION_LTR} if the layout direction is not RTL.
+     *
+     * @hide
+     */
+    public int getLayoutDirection();
+
+    /**
+     * Tells if this view parent can resolve the text direction.
+     * See {@link View#setTextDirection(int)}
+     *
+     * @return True if this view parent can resolve the text direction.
+     *
+     * @hide
+     */
+    public boolean canResolveTextDirection();
+
+    /**
+     * Tells if this view parent text direction is resolved.
+     * See {@link View#setTextDirection(int)}
+     *
+     * @return True if this view parent text direction is resolved.
+     *
+     * @hide
+     */
+    public boolean isTextDirectionResolved();
+
+    /**
+     * Return this view parent text direction. See {@link View#getTextDirection()}
+     *
+     * @return the resolved text direction. Returns one of:
+     *
+     * {@link View#TEXT_DIRECTION_FIRST_STRONG}
+     * {@link View#TEXT_DIRECTION_ANY_RTL},
+     * {@link View#TEXT_DIRECTION_LTR},
+     * {@link View#TEXT_DIRECTION_RTL},
+     * {@link View#TEXT_DIRECTION_LOCALE}
+     *
+     * @hide
+     */
+    public int getTextDirection();
+
+    /**
+     * Tells if this view parent can resolve the text alignment.
+     * See {@link View#setTextAlignment(int)}
+     *
+     * @return True if this view parent can resolve the text alignment.
+     *
+     * @hide
+     */
+    public boolean canResolveTextAlignment();
+
+    /**
+     * Tells if this view parent text alignment is resolved.
+     * See {@link View#setTextAlignment(int)}
+     *
+     * @return True if this view parent text alignment is resolved.
+     *
+     * @hide
+     */
+    public boolean isTextAlignmentResolved();
+
+    /**
+     * Return this view parent text alignment. See {@link android.view.View#getTextAlignment()}
+     *
+     * @return the resolved text alignment. Returns one of:
+     *
+     * {@link View#TEXT_ALIGNMENT_GRAVITY},
+     * {@link View#TEXT_ALIGNMENT_CENTER},
+     * {@link View#TEXT_ALIGNMENT_TEXT_START},
+     * {@link View#TEXT_ALIGNMENT_TEXT_END},
+     * {@link View#TEXT_ALIGNMENT_VIEW_START},
+     * {@link View#TEXT_ALIGNMENT_VIEW_END}
+     *
+     * @hide
+     */
+    public int getTextAlignment();
 }