Merge "Correct cropping of windows above decor layer." into pi-dev
diff --git a/services/core/java/com/android/server/wm/WindowState.java b/services/core/java/com/android/server/wm/WindowState.java
index 6c2821d..674414f 100644
--- a/services/core/java/com/android/server/wm/WindowState.java
+++ b/services/core/java/com/android/server/wm/WindowState.java
@@ -4270,6 +4270,24 @@
         }
     }
 
+    private boolean skipDecorCrop() {
+        // The decor frame is used to specify the region not covered by the system
+        // decorations (nav bar, status bar). In case this is empty, for example with
+        // FLAG_TRANSLUCENT_NAVIGATION, we don't need to do any cropping.
+        if (mDecorFrame.isEmpty()) {
+            return true;
+        }
+
+        // But if we have a frame, and are an application window, then we must be cropped.
+        if (mAppToken != null) {
+            return false;
+        }
+
+        // For non application windows, we may be allowed to extend over the decor bars
+        // depending on our type and permissions assosciated with our token.
+        return mToken.canLayerAboveSystemBars();
+    }
+
     /**
      * Calculate the window crop according to system decor policy. In general this is
      * the system decor rect (see #calculateSystemDecorRect), but we also have some
@@ -4287,7 +4305,7 @@
             policyCrop.intersect(-mCompatFrame.left, -mCompatFrame.top,
                     displayInfo.logicalWidth - mCompatFrame.left,
                     displayInfo.logicalHeight - mCompatFrame.top);
-        } else if (mDecorFrame.isEmpty()) {
+        } else if (skipDecorCrop()) {
             // Windows without policy decor aren't cropped.
             policyCrop.set(0, 0, mCompatFrame.width(), mCompatFrame.height());
         } else {
diff --git a/services/core/java/com/android/server/wm/WindowToken.java b/services/core/java/com/android/server/wm/WindowToken.java
index 14680d9..b97460a 100644
--- a/services/core/java/com/android/server/wm/WindowToken.java
+++ b/services/core/java/com/android/server/wm/WindowToken.java
@@ -17,7 +17,7 @@
 package com.android.server.wm;
 
 import static android.view.WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER;
-
+import static android.view.WindowManager.LayoutParams.TYPE_NAVIGATION_BAR;
 import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_ADD_REMOVE;
 import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_FOCUS;
 import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_WINDOW_MOVEMENT;
@@ -336,4 +336,16 @@
     boolean okToAnimate() {
         return mDisplayContent != null && mDisplayContent.okToAnimate();
     }
+
+    /**
+     * Return whether windows from this token can layer above the
+     * system bars, or in other words extend outside of the "Decor Frame"
+     */
+    boolean canLayerAboveSystemBars() {
+        int layer = mService.mPolicy.getWindowLayerFromTypeLw(windowType,
+                mOwnerCanManageAppTokens);
+        int navLayer = mService.mPolicy.getWindowLayerFromTypeLw(TYPE_NAVIGATION_BAR,
+                mOwnerCanManageAppTokens);
+        return mOwnerCanManageAppTokens && (layer > navLayer);
+    }
 }