Merge "Fix RTL changes in PagedTileLayout" into tm-dev

packages/SystemUI/src/com/android/systemui/fragments/FragmentHostManager.java

@@ -54,7 +54,7 @@ public class FragmentHostManager {
     private final View mRootView;
     private final InterestingConfigChanges mConfigChanges = new InterestingConfigChanges(
             ActivityInfo.CONFIG_FONT_SCALE | ActivityInfo.CONFIG_LOCALE
-                    | ActivityInfo.CONFIG_LAYOUT_DIRECTION | ActivityInfo.CONFIG_ASSETS_PATHS);
+                    | ActivityInfo.CONFIG_ASSETS_PATHS);
     private final FragmentService mManager;
     private final ExtensionFragmentManager mPlugins = new ExtensionFragmentManager();
 

packages/SystemUI/src/com/android/systemui/qs/PagedTileLayout.java

@@ -39,6 +39,7 @@ public class PagedTileLayout extends ViewPager implements QSTileLayout {
 
     private static final boolean DEBUG = false;
     private static final String CURRENT_PAGE = "current_page";
+    private static final int NO_PAGE = -1;
 
     private static final String TAG = "PagedTileLayout";
     private static final int REVEAL_SCROLL_DURATION_MILLIS = 750;
@@ -109,13 +110,14 @@ public class PagedTileLayout extends ViewPager implements QSTileLayout {
     }
 
     public void saveInstanceState(Bundle outState) {
-        outState.putInt(CURRENT_PAGE, getCurrentItem());
+        int resolvedPage = mPageToRestore != NO_PAGE ? mPageToRestore : getCurrentPageNumber();
+        outState.putInt(CURRENT_PAGE, resolvedPage);
     }
 
     public void restoreInstanceState(Bundle savedInstanceState) {
         // There's only 1 page at this point. We want to restore the correct page once the
         // pages have been inflated
-        mPageToRestore = savedInstanceState.getInt(CURRENT_PAGE, -1);
+        mPageToRestore = savedInstanceState.getInt(CURRENT_PAGE, NO_PAGE);
     }
 
     @Override
@@ -151,12 +153,15 @@ public class PagedTileLayout extends ViewPager implements QSTileLayout {
 
     @Override
     public void onRtlPropertiesChanged(int layoutDirection) {
+        // The configuration change will change the flag in the view (that's returned in
+        // isLayoutRtl). As we detect the change, we use the cached direction to store the page
+        // before setting it.
+        final int page = getPageNumberForDirection(mLayoutDirection == LAYOUT_DIRECTION_RTL);
         super.onRtlPropertiesChanged(layoutDirection);
         if (mLayoutDirection != layoutDirection) {
             mLayoutDirection = layoutDirection;
             setAdapter(mAdapter);
-            setCurrentItem(0, false);
-            mPageToRestore = 0;
+            setCurrentItem(page, false);
         }
     }
 
@@ -172,8 +177,12 @@ public class PagedTileLayout extends ViewPager implements QSTileLayout {
      * Obtains the current page number respecting RTL
      */
     private int getCurrentPageNumber() {
+        return getPageNumberForDirection(isLayoutRtl());
+    }
+
+    private int getPageNumberForDirection(boolean isLayoutRTL) {
         int page = getCurrentItem();
-        if (mLayoutDirection == LAYOUT_DIRECTION_RTL) {
+        if (isLayoutRTL) {
             page = mPages.size() - 1 - page;
         }
         return page;
@@ -388,9 +397,9 @@ public class PagedTileLayout extends ViewPager implements QSTileLayout {
         mPageIndicator.setNumPages(mPages.size());
         setAdapter(mAdapter);
         mAdapter.notifyDataSetChanged();
-        if (mPageToRestore != -1) {
+        if (mPageToRestore != NO_PAGE) {
             setCurrentItem(mPageToRestore, false);
-            mPageToRestore = -1;
+            mPageToRestore = NO_PAGE;
         }
     }
 
@@ -479,9 +488,27 @@ public class PagedTileLayout extends ViewPager implements QSTileLayout {
                 maxHeight = height;
             }
         }
+        if (mPages.get(0).getParent() == null) {
+            // Measure page 0 so we know how tall it is if it's not attached to the pager.
+            mPages.get(0).measure(widthMeasureSpec, heightMeasureSpec);
+            int height = mPages.get(0).getMeasuredHeight();
+            if (height > maxHeight) {
+                maxHeight = height;
+            }
+        }
         setMeasuredDimension(getMeasuredWidth(), maxHeight + getPaddingBottom());
     }
 
+    @Override
+    protected void onLayout(boolean changed, int l, int t, int r, int b) {
+        super.onLayout(changed, l, t, r, b);
+        if (mPages.get(0).getParent() == null) {
+            // Layout page 0, so we can get the bottom of the tiles. We only do this if the page
+            // is not attached.
+            mPages.get(0).layout(l, t, r, b);
+        }
+    }
+
     public int getColumnCount() {
         if (mPages.size() == 0) return 0;
         return mPages.get(0).mColumns;
@@ -625,8 +652,7 @@ public class PagedTileLayout extends ViewPager implements QSTileLayout {
                     if (mPageIndicator == null) return;
                     if (mPageListener != null) {
                         int pageNumber = isLayoutRtl() ? mPages.size() - 1 - position : position;
-                        mPageListener.onPageChanged(isLayoutRtl() ? position == mPages.size() - 1
-                                : position == 0, pageNumber);
+                        mPageListener.onPageChanged(pageNumber == 0, pageNumber);
                     }
                 }
 
@@ -645,8 +671,8 @@ public class PagedTileLayout extends ViewPager implements QSTileLayout {
                     mPageIndicator.setLocation(mPageIndicatorPosition);
                     if (mPageListener != null) {
                         int pageNumber = isLayoutRtl() ? mPages.size() - 1 - position : position;
-                        mPageListener.onPageChanged(positionOffsetPixels == 0 &&
-                                (isLayoutRtl() ? position == mPages.size() - 1 : position == 0),
+                        mPageListener.onPageChanged(
+                                positionOffsetPixels == 0 && pageNumber == 0,
                                 // Send only valid page number on integer pages
                                 positionOffsetPixels == 0 ? pageNumber : PageListener.INVALID_PAGE
                         );