Allow out-of-process iframes to update the mouse cursor

third_party/WebKit/Source/web/ChromeClientImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 644 matching lines @@
     // If the enumeration can't happen, call the callback with an empty list.
     if (!client->enumerateChosenDirectory(fileChooser->settings().selectedFiles[0], chooserCompletion))
         chooserCompletion->didChooseFile(WebVector<WebString>());
 }
 
 Cursor ChromeClientImpl::lastSetCursorForTesting() const
 {
     return m_lastSetMouseCursorForTesting;
 }
 
-void ChromeClientImpl::setCursor(const Cursor& cursor)
+void ChromeClientImpl::setCursor(const Cursor& cursor, LocalFrame* localRoot)
 {
     m_lastSetMouseCursorForTesting = cursor;
-    setCursor(WebCursorInfo(cursor));
+    setCursor(WebCursorInfo(cursor), localRoot);
 }
 
-void ChromeClientImpl::setCursor(const WebCursorInfo& cursor)
+void ChromeClientImpl::setCursor(const WebCursorInfo& cursor, LocalFrame* localRoot)
 {
     if (m_cursorOverridden)
         return;
 
 #if OS(MACOSX)
     // On Mac the mousemove event propagates to both the popup and main window.
     // If a popup is open we don't want the main window to change the cursor.
     if (m_webView->hasOpenedPopup())
         return;
 #endif
-    if (m_webView->client())
+    if (!m_webView->client())
+        return;
+    // FIXME: For top-level frames we still use the WebView as a WebWidget. This

[dcheng, 2015/10/15 17:07:07]

Nasko points out this should be TODO.

+    // special case will be removed when top-level frames get WebFrameWidgets.
+    if (localRoot->isMainFrame()) {
         m_webView->client()->didChangeCursor(cursor);
+    } else {
+        WebLocalFrameImpl* webFrame = WebLocalFrameImpl::fromFrame(localRoot);
+        ASSERT(webFrame);
+        ASSERT(webFrame->frameWidget());
+        if (toWebFrameWidgetImpl(webFrame->frameWidget())->client())
+            toWebFrameWidgetImpl(webFrame->frameWidget())->client()->didChangeCursor(cursor);
+    }
 }
 
 void ChromeClientImpl::setCursorForPlugin(const WebCursorInfo& cursor)
 {
-    setCursor(cursor);
+    setCursor(cursor, m_webView->page()->deprecatedLocalMainFrame());
 }
 
 void ChromeClientImpl::setCursorOverridden(bool overridden)
 {
     m_cursorOverridden = overridden;
 }
 
 void ChromeClientImpl::postAccessibilityNotification(AXObject* obj, AXObjectCache::AXNotification notification)
 {
     // Alert assistive technology about the accessibility object notification.
@@ skipping 308 matching lines @@
     return m_webView->elasticOverscroll();
 }
 
 void ChromeClientImpl::didObserveNonGetFetchFromScript() const
 {
     if (m_webView->pageImportanceSignals())
         m_webView->pageImportanceSignals()->setIssuedNonGetFetchFromScript();
 }
 
 } // namespace blink