Centering the crop by default in system wallpaper cropper

Bug: 12034934

Change-Id: Ice1b1140bd6e351dd4e520f555f245d84a645aac

2 files changed, 18 insertions, 5 deletions

diff --git a/packages/WallpaperCropper/res/values/config.xml b/packages/WallpaperCropper/res/values/config.xml
index 1b24190..2e2fa6f 100644
--- a/packages/WallpaperCropper/res/values/config.xml
+++ b/packages/WallpaperCropper/res/values/config.xml
@@ -15,4 +15,7 @@
 -->
 <resources>
     <bool name="allow_rotation">false</bool>
+    <!-- Specifies whether to expand the cropped area on both sides (rather
+         than just to one side) -->
+    <bool name="center_crop">true</bool>
 </resources>
diff --git a/packages/WallpaperCropper/src/com/android/wallpapercropper/WallpaperCropActivity.java b/packages/WallpaperCropper/src/com/android/wallpapercropper/WallpaperCropActivity.java
index e0c59ab..cbf0c52 100644
--- a/packages/WallpaperCropper/src/com/android/wallpapercropper/WallpaperCropActivity.java
+++ b/packages/WallpaperCropper/src/com/android/wallpapercropper/WallpaperCropActivity.java
@@ -330,10 +330,10 @@ public class WallpaperCropActivity extends Activity {
 
     protected void cropImageAndSetWallpaper(Uri uri,
             OnBitmapCroppedHandler onBitmapCroppedHandler, final boolean finishActivityWhenDone) {
+        boolean centerCrop = getResources().getBoolean(R.bool.center_crop);
         // Get the crop
         boolean ltr = mCropView.getLayoutDirection() == View.LAYOUT_DIRECTION_LTR;
 
-
         Display d = getWindowManager().getDefaultDisplay();
 
         Point displaySize = new Point();
@@ -358,15 +358,25 @@ public class WallpaperCropActivity extends Activity {
         // ADJUST CROP WIDTH
         // Extend the crop all the way to the right, for parallax
         // (or all the way to the left, in RTL)
-        float extraSpace = ltr ? rotatedInSize[0] - cropRect.right : cropRect.left;
+        float extraSpace;
+        if (centerCrop) {
+            extraSpace = 2f * Math.min(rotatedInSize[0] - cropRect.right, cropRect.left);
+        } else {
+            extraSpace = ltr ? rotatedInSize[0] - cropRect.right : cropRect.left;
+        }
         // Cap the amount of extra width
         float maxExtraSpace = defaultWallpaperSize.x / cropScale - cropRect.width();
         extraSpace = Math.min(extraSpace, maxExtraSpace);
 
-        if (ltr) {
-            cropRect.right += extraSpace;
+        if (centerCrop) {
+            cropRect.left -= extraSpace / 2f;
+            cropRect.right += extraSpace / 2f;
         } else {
-            cropRect.left -= extraSpace;
+            if (ltr) {
+                cropRect.right += extraSpace;
+            } else {
+                cropRect.left -= extraSpace;
+            }
         }
 
         // ADJUST CROP HEIGHT