1 files changed, 79 insertions, 0 deletions
diff --git a/chromium/third_party/WebKit/Source/core/page/ScopedPageLoadDeferrer.cpp b/chromium/third_party/WebKit/Source/core/page/ScopedPageLoadDeferrer.cpp
new file mode 100644
index 00000000000..9ee79b638c1
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+++ b/chromium/third_party/WebKit/Source/core/page/ScopedPageLoadDeferrer.cpp
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2006, 2007, 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "config.h"
+#include "core/page/ScopedPageLoadDeferrer.h"
+
+#include "core/dom/Document.h"
+#include "core/frame/LocalFrame.h"
+#include "core/loader/FrameLoader.h"
+#include "core/page/Page.h"
+#include "wtf/HashSet.h"
+
+namespace WebCore {
+
+ScopedPageLoadDeferrer::ScopedPageLoadDeferrer(Page* exclusion)
+{
+    const HashSet<Page*>& pages = Page::ordinaryPages();
+
+    HashSet<Page*>::const_iterator end = pages.end();
+    for (HashSet<Page*>::const_iterator it = pages.begin(); it != end; ++it) {
+        Page* page = *it;
+        if (page == exclusion || page->defersLoading())
+            continue;
+
+        if (page->mainFrame()->isLocalFrame()) {
+            m_deferredFrames.append(page->deprecatedLocalMainFrame());
+
+            // Ensure that we notify the client if the initial empty document is accessed before
+            // showing anything modal, to prevent spoofs while the modal window or sheet is visible.
+            page->deprecatedLocalMainFrame()->loader().notifyIfInitialDocumentAccessed();
+        }
+
+        // This code is not logically part of load deferring, but we do not want JS code executed
+        // beneath modal windows or sheets, which is exactly when ScopedPageLoadDeferrer is used.
+        for (Frame* frame = page->mainFrame(); frame; frame = frame->tree().traverseNext()) {
+            if (frame->isLocalFrame())
+                toLocalFrame(frame)->document()->suspendScheduledTasks();
+        }
+    }
+
+    size_t count = m_deferredFrames.size();
+    for (size_t i = 0; i < count; ++i) {
+        if (Page* page = m_deferredFrames[i]->page())
+            page->setDefersLoading(true);
+    }
+}
+
+ScopedPageLoadDeferrer::~ScopedPageLoadDeferrer()
+{
+    for (size_t i = 0; i < m_deferredFrames.size(); ++i) {
+        if (Page* page = m_deferredFrames[i]->page()) {
+            page->setDefersLoading(false);
+
+            for (Frame* frame = page->mainFrame(); frame; frame = frame->tree().traverseNext()) {
+                if (frame->isLocalFrame())
+                    toLocalFrame(frame)->document()->resumeScheduledTasks();
+            }
+        }
+    }
+}
+
+} // namespace WebCore