Keep aspect ratio of Material action key background

Bug: 15681452
Change-Id: Ie4b823dca541b76b68cade580845a21ff0b21e2f

1 files changed, 19 insertions, 5 deletions

diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardView.java b/java/src/com/android/inputmethod/keyboard/KeyboardView.java
index 075cd901d..bb3cbb0eb 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardView.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardView.java
@@ -340,11 +340,25 @@ public class KeyboardView extends View {
     // Draw key background.
     protected void onDrawKeyBackground(final Key key, final Canvas canvas,
             final Drawable background) {
-        final Rect padding = mKeyBackgroundPadding;
-        final int bgWidth = key.getDrawWidth() + padding.left + padding.right;
-        final int bgHeight = key.getHeight() + padding.top + padding.bottom;
-        final int bgX = -padding.left;
-        final int bgY = -padding.top;
+        final int keyWidth = key.getDrawWidth();
+        final int keyHeight = key.getHeight();
+        final int bgWidth, bgHeight, bgX, bgY;
+        if (key.needsToKeepBackgroundAspectRatio(mDefaultKeyLabelFlags)) {
+            final int intrinsicWidth = background.getIntrinsicWidth();
+            final int intrinsicHeight = background.getIntrinsicHeight();
+            final float minScale = Math.min(
+                    keyWidth / (float)intrinsicWidth, keyHeight / (float)intrinsicHeight);
+            bgWidth = (int)(intrinsicWidth * minScale);
+            bgHeight = (int)(intrinsicHeight * minScale);
+            bgX = (keyWidth - bgWidth) / 2;
+            bgY = (keyHeight - bgHeight) / 2;
+        } else {
+            final Rect padding = mKeyBackgroundPadding;
+            bgWidth = keyWidth + padding.left + padding.right;
+            bgHeight = keyHeight + padding.top + padding.bottom;
+            bgX = -padding.left;
+            bgY = -padding.top;
+        }
         final Rect bounds = background.getBounds();
         if (bgWidth != bounds.right || bgHeight != bounds.bottom) {
             background.setBounds(0, 0, bgWidth, bgHeight);