1 files changed, 126 insertions, 0 deletions
diff --git a/Source/WebKit/gtk/WebCoreSupport/DocumentLoaderGtk.cpp b/Source/WebKit/gtk/WebCoreSupport/DocumentLoaderGtk.cpp
new file mode 100644
index 0000000..6031b62
--- /dev/null
+++ b/Source/WebKit/gtk/WebCoreSupport/DocumentLoaderGtk.cpp
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
+ * Copyright (C) 2009  Jan Michael Alonzo
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+    * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "DocumentLoaderGtk.h"
+
+#include "GRefPtr.h"
+#include "webkitwebdatasource.h"
+#include "webkitwebdatasourceprivate.h"
+
+using namespace WebCore;
+
+namespace WebKit {
+
+DocumentLoader::DocumentLoader(const ResourceRequest& request, const SubstituteData& substituteData)
+    : WebCore::DocumentLoader(request, substituteData)
+    , m_isDataSourceReffed(false)
+    , m_dataSource(0)
+{
+}
+
+void DocumentLoader::setDataSource(WebKitWebDataSource* dataSource)
+{
+    ASSERT(!m_dataSource);
+
+    m_dataSource = dataSource;
+    refDataSource();
+}
+
+void DocumentLoader::detachDataSource()
+{
+    unrefDataSource();
+}
+
+void DocumentLoader::attachToFrame()
+{
+    WebCore::DocumentLoader::attachToFrame();
+
+    if (m_dataSource) {
+        refDataSource();
+        return;
+    }
+
+    // We may get to here without having a datasource, when the data
+    // is coming from the page cache.
+    GRefPtr<WebKitWebDataSource> dataSource(adoptGRef(kitNew(this)));
+    setDataSource(dataSource.get());
+}
+
+void DocumentLoader::detachFromFrame()
+{
+    WebCore::DocumentLoader::detachFromFrame();
+
+    if (m_loadingResources.isEmpty())
+        unrefDataSource();
+}
+
+void DocumentLoader::increaseLoadCount(unsigned long identifier)
+{
+    ASSERT(m_dataSource);
+
+    if (m_loadingResources.contains(identifier))
+        return;
+    m_loadingResources.add(identifier);
+    refDataSource();
+}
+
+void DocumentLoader::decreaseLoadCount(unsigned long identifier)
+{
+    HashSet<unsigned long>::iterator it = m_loadingResources.find(identifier);
+
+    // It is valid for a load to be cancelled before it's started.
+    if (it == m_loadingResources.end())
+        return;
+
+    m_loadingResources.remove(it);
+
+    if (m_loadingResources.isEmpty() && !frame())
+        unrefDataSource();
+}
+
+// helper methos to avoid ref count churn
+void DocumentLoader::refDataSource()
+{
+    if (!m_dataSource || m_isDataSourceReffed)
+        return;
+    m_isDataSourceReffed = true;
+    g_object_ref(m_dataSource);
+}
+void DocumentLoader::unrefDataSource()
+{
+    if (!m_isDataSourceReffed)
+        return;
+    ASSERT(m_dataSource);
+    m_isDataSourceReffed = false;
+    g_object_unref(m_dataSource);
+    m_dataSource = 0;
+}
+
+} // end namespace WebKit