am ee001119: Merge "LayoutLib: Add assertions for typeface." into lmp-preview-dev

* commit 'ee0011198ff150f972c8afbc5dff695bce2af1f1':
  LayoutLib: Add assertions for typeface.

tools/layoutlib/bridge/src/android/graphics/Canvas_Delegate.java

@@ -977,7 +977,7 @@ public final class Canvas_Delegate {
     /*package*/ static void native_drawText(long nativeCanvas,
             final char[] text, final int index, final int count,
             final float startX, final float startY, final int flags, long paint,
-            long typeface) {
+            final long typeface) {
 
         draw(nativeCanvas, paint, false /*compositeOnly*/, false /*forceSrcMode*/,
                 new GcSnapshot.Drawable() {
@@ -985,6 +985,11 @@ public final class Canvas_Delegate {
             public void draw(Graphics2D graphics, Paint_Delegate paintDelegate) {
                 // WARNING: the logic in this method is similar to Paint_Delegate.measureText.
                 // Any change to this method should be reflected in Paint.measureText
+
+                // assert that the typeface passed is actually the one stored in paint.
+                assert (typeface == paintDelegate.mNativeTypeface);
+
+
                 // Paint.TextAlign indicates how the text is positioned relative to X.
                 // LEFT is the default and there's nothing to do.
                 float x = startX;

tools/layoutlib/bridge/src/android/graphics/Paint_Delegate.java

@@ -93,6 +93,8 @@ public class Paint_Delegate {
 
     private Locale mLocale = Locale.getDefault();
 
+    // Used only to assert invariants.
+    public long mNativeTypeface;
 
     // ---- Public Helper methods ----
 
@@ -888,6 +890,7 @@ public class Paint_Delegate {
         }
 
         delegate.mTypeface = Typeface_Delegate.getDelegate(typeface);
+        delegate.mNativeTypeface = typeface;
         delegate.updateFontObject();
         return typeface;
     }
@@ -966,15 +969,10 @@ public class Paint_Delegate {
     }
 
     @LayoutlibDelegate
-    /*package*/ static float native_getTextRunAdvances(long native_object,
-            long native_typeface /*ignored*/,
+    /*package*/ static float native_getTextRunAdvances(long native_object, long native_typeface,
             char[] text, int index, int count, int contextIndex, int contextCount,
             int flags, float[] advances, int advancesIndex) {
 
-        // native_typeface is passed here since Framework's old implementation did not have the
-        // typeface object associated with the Paint. Since, we follow the new framework way,
-        // we store the typeface with the paint and use it directly.
-
         if (advances != null)
             for (int i = advancesIndex; i< advancesIndex+count; i++)
                 advances[i]=0;
@@ -983,6 +981,12 @@ public class Paint_Delegate {
         if (delegate == null) {
             return 0.f;
         }
+
+        // native_typeface is passed here since Framework's old implementation did not have the
+        // typeface object associated with the Paint. Since, we follow the new framework way,
+        // we store the typeface with the paint and use it directly.
+        assert (native_typeface == delegate.mNativeTypeface);
+
         boolean isRtl = isRtl(flags);
 
         int limit = index + count;
@@ -1054,6 +1058,10 @@ public class Paint_Delegate {
         if (delegate == null) {
             return;
         }
+
+        // assert that the typeface passed is actually the one that we had stored.
+        assert (native_typeface == delegate.mNativeTypeface);
+
         delegate.measureText(text, index, count, isRtl(bidiFlags)).roundOut(bounds);
     }
 
@@ -1080,6 +1088,7 @@ public class Paint_Delegate {
         mJoin = paint.mJoin;
         mTextAlign = paint.mTextAlign;
         mTypeface = paint.mTypeface;
+        mNativeTypeface = paint.mNativeTypeface;
         mStrokeWidth = paint.mStrokeWidth;
         mStrokeMiter = paint.mStrokeMiter;
         mTextSize = paint.mTextSize;
@@ -1103,6 +1112,7 @@ public class Paint_Delegate {
         mJoin = Paint.Join.MITER.nativeInt;
         mTextAlign = 0;
         mTypeface = Typeface_Delegate.getDelegate(Typeface.sDefaults[0].native_instance);
+        mNativeTypeface = 0;
         mStrokeWidth = 1.f;
         mStrokeMiter = 4.f;
         mTextSize = 20.f;