--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/loader/PolicyChecker.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,197 @@
+/*
+ * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
+ * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
+ *
+ * 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 "PolicyChecker.h"
+
+#include "DocumentLoader.h"
+#include "FormState.h"
+#include "Frame.h"
+#include "FrameLoader.h"
+#include "FrameLoaderClient.h"
+#include "HTMLFormElement.h"
+
+namespace WebCore {
+
+PolicyChecker::PolicyChecker(Frame* frame)
+    : m_frame(frame)
+    , m_delegateIsDecidingNavigationPolicy(false)
+    , m_delegateIsHandlingUnimplementablePolicy(false)
+    , m_loadType(FrameLoadTypeStandard)
+{
+}
+
+void PolicyChecker::checkNavigationPolicy(const ResourceRequest& newRequest, NavigationPolicyDecisionFunction function, void* argument)
+{
+    checkNavigationPolicy(newRequest, m_frame->loader()->activeDocumentLoader(), 0, function, argument);
+}
+
+void PolicyChecker::checkNavigationPolicy(const ResourceRequest& request, DocumentLoader* loader,
+    PassRefPtr<FormState> formState, NavigationPolicyDecisionFunction function, void* argument)
+{
+    NavigationAction action = loader->triggeringAction();
+    if (action.isEmpty()) {
+        action = NavigationAction(request.url(), NavigationTypeOther);
+        loader->setTriggeringAction(action);
+    }
+
+    // Don't ask more than once for the same request or if we are loading an empty URL.
+    // This avoids confusion on the part of the client.
+    if (equalIgnoringHeaderFields(request, loader->lastCheckedRequest()) || (!request.isNull() && request.url().isEmpty())) {
+        function(argument, request, 0, true);
+        loader->setLastCheckedRequest(request);
+        return;
+    }
+    
+    // We are always willing to show alternate content for unreachable URLs;
+    // treat it like a reload so it maintains the right state for b/f list.
+    if (loader->substituteData().isValid() && !loader->substituteData().failingURL().isEmpty()) {
+        if (isBackForwardLoadType(m_loadType))
+            m_loadType = FrameLoadTypeReload;
+        function(argument, request, 0, true);
+        return;
+    }
+    
+    loader->setLastCheckedRequest(request);
+
+    m_callback.set(request, formState.get(), function, argument);
+
+    m_delegateIsDecidingNavigationPolicy = true;
+    m_frame->loader()->client()->dispatchDecidePolicyForNavigationAction(&PolicyChecker::continueAfterNavigationPolicy,
+        action, request, formState);
+    m_delegateIsDecidingNavigationPolicy = false;
+}
+
+void PolicyChecker::checkNewWindowPolicy(const NavigationAction& action, NewWindowPolicyDecisionFunction function,
+    const ResourceRequest& request, PassRefPtr<FormState> formState, const String& frameName, void* argument)
+{
+    m_callback.set(request, formState, frameName, function, argument);
+    m_frame->loader()->client()->dispatchDecidePolicyForNewWindowAction(&PolicyChecker::continueAfterNewWindowPolicy,
+        action, request, formState, frameName);
+}
+
+void PolicyChecker::checkContentPolicy(const String& MIMEType, ContentPolicyDecisionFunction function, void* argument)
+{
+    m_callback.set(function, argument);
+    m_frame->loader()->client()->dispatchDecidePolicyForMIMEType(&PolicyChecker::continueAfterContentPolicy,
+        MIMEType, m_frame->loader()->activeDocumentLoader()->request());
+}
+
+void PolicyChecker::cancelCheck()
+{
+    m_frame->loader()->client()->cancelPolicyCheck();
+    m_callback.clear();
+}
+
+void PolicyChecker::stopCheck()
+{
+    m_frame->loader()->client()->cancelPolicyCheck();
+    PolicyCallback callback = m_callback;
+    m_callback.clear();
+    callback.cancel();
+}
+
+void PolicyChecker::cannotShowMIMEType(const ResourceResponse& response)
+{
+    handleUnimplementablePolicy(m_frame->loader()->client()->cannotShowMIMETypeError(response));
+}
+
+void PolicyChecker::continueLoadAfterWillSubmitForm(PolicyAction)
+{
+    // See header file for an explaination of why this function
+    // isn't like the others.
+    m_frame->loader()->continueLoadAfterWillSubmitForm();
+}
+
+void PolicyChecker::continueAfterNavigationPolicy(PolicyAction policy)
+{
+    PolicyCallback callback = m_callback;
+    m_callback.clear();
+
+    bool shouldContinue = policy == PolicyUse;
+
+    switch (policy) {
+        case PolicyIgnore:
+            callback.clearRequest();
+            break;
+        case PolicyDownload:
+            m_frame->loader()->client()->startDownload(callback.request());
+            callback.clearRequest();
+            break;
+        case PolicyUse: {
+            ResourceRequest request(callback.request());
+
+            if (!m_frame->loader()->client()->canHandleRequest(request)) {
+                handleUnimplementablePolicy(m_frame->loader()->cannotShowURLError(callback.request()));
+                callback.clearRequest();
+                shouldContinue = false;
+            }
+            break;
+        }
+    }
+
+    callback.call(shouldContinue);
+}
+
+void PolicyChecker::continueAfterNewWindowPolicy(PolicyAction policy)
+{
+    PolicyCallback callback = m_callback;
+    m_callback.clear();
+
+    switch (policy) {
+        case PolicyIgnore:
+            callback.clearRequest();
+            break;
+        case PolicyDownload:
+            m_frame->loader()->client()->startDownload(callback.request());
+            callback.clearRequest();
+            break;
+        case PolicyUse:
+            break;
+    }
+
+    callback.call(policy == PolicyUse);
+}
+
+void PolicyChecker::continueAfterContentPolicy(PolicyAction policy)
+{
+    PolicyCallback callback = m_callback;
+    m_callback.clear();
+    callback.call(policy);
+}
+
+void PolicyChecker::handleUnimplementablePolicy(const ResourceError& error)
+{
+    m_delegateIsHandlingUnimplementablePolicy = true;
+    m_frame->loader()->client()->dispatchUnableToImplementPolicy(error);
+    m_delegateIsHandlingUnimplementablePolicy = false;
+}
+
+} // namespace WebCore