Bug 1118134 - expose a method to set chromemargin. r=mstange r=bz

dom/base/nsDOMWindowUtils.cpp

@@ -3888,6 +3888,28 @@ nsDOMWindowUtils::SetAudioVolume(float aVolume)
   return window->SetAudioVolume(aVolume);
 }
 
+NS_IMETHODIMP
+nsDOMWindowUtils::SetChromeMargin(int32_t aTop,
+                                  int32_t aRight,
+                                  int32_t aBottom,
+                                  int32_t aLeft)
+{
+  nsCOMPtr<nsPIDOMWindow> window = do_QueryReferent(mWindow);
+  if (window) {
+    nsCOMPtr<nsIBaseWindow> baseWindow = do_QueryInterface(window->GetDocShell());
+    if (baseWindow) {
+      nsCOMPtr<nsIWidget> widget;
+      baseWindow->GetMainWidget(getter_AddRefs(widget));
+      if (widget) {
+        nsIntMargin margins(aTop, aRight, aBottom, aLeft);
+        return widget->SetNonClientMargins(margins);
+      }
+    }
+  }
+
+  return NS_OK;
+}
+
 NS_IMETHODIMP
 nsDOMWindowUtils::XpconnectArgument(nsIDOMWindowUtils* aThis)
 {

dom/interfaces/base/nsIDOMWindowUtils.idl

@@ -50,7 +50,7 @@ interface nsITranslationNodeList;
 interface nsIJSRAIIHelper;
 interface nsIContentPermissionRequest;
 
-[scriptable, uuid(5ed850de-2b57-4555-ac48-93292e852eab)]
+[scriptable, uuid(c8b21a1e-a69c-11e4-801f-0f8dde75d4c2)]
 interface nsIDOMWindowUtils : nsISupports {
 
   /**
@@ -1737,6 +1737,16 @@ interface nsIDOMWindowUtils : nsISupports {
    * May throw NS_ERROR_NOT_AVAILABLE.
    */
   readonly attribute unsigned long long framesReflowed;
+
+  /**
+   * Controls the amount of chrome that should be visible on each side of
+   * the window. Works like the chromemargin xul:window attribute.
+   * This should only be used with non-XUL windows.
+   */
+  void setChromeMargin(in int32_t aTop,
+                       in int32_t aRight,
+                       in int32_t aBottom,
+                       in int32_t aLeft);
 };
 
 [scriptable, uuid(c694e359-7227-4392-a138-33c0cc1f15a6)]

widget/cocoa/nsCocoaWindow.mm

@@ -2016,6 +2016,8 @@ NS_IMETHODIMP nsCocoaWindow::SetNonClientMargins(nsIntMargin &margins)
 
   SetDrawsInTitlebar(margins.top == 0);
 
+  return NS_OK;
+
   NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
 }