Add QQuick API for intercepting navigation requests

Add missing navigationRequested API to be able to intercept
navigation requests. This is useful for ignoring requests
for example in kiosk-like applications that want to restrinct
navigation to a specific url or domain, or want to disable
specific types of navigation requests (e.g. reloading, clicking
links, form submissions).

Change-Id: Ie375e635a3c3566527972d05f5d99b39489c5ca8
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

1 files changed, 139 insertions, 1 deletions

diff --git a/src/core/network_delegate_qt.cpp b/src/core/network_delegate_qt.cpp
index 27807c499..424d0e631 100644
--- a/src/core/network_delegate_qt.cpp
+++ b/src/core/network_delegate_qt.cpp
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
 ** This file is part of the QtWebEngine module of the Qt Toolkit.
@@ -40,3 +40,141 @@
 ****************************************************************************/
 
 #include "network_delegate_qt.h"
+
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/resource_request_details.h"
+#include "content/public/browser/resource_request_info.h"
+#include "content/public/common/page_transition_types.h"
+#include "net/base/load_flags.h"
+#include "net/url_request/url_request.h"
+#include "type_conversion.h"
+#include "web_contents_adapter_client.h"
+#include "web_contents_view_qt.h"
+
+namespace {
+
+int pageTransitionToNavigationType(content::PageTransition transition)
+{
+    int32 qualifier = content::PageTransitionGetQualifier(transition);
+
+    if (qualifier & content::PAGE_TRANSITION_FORWARD_BACK)
+        return WebContentsAdapterClient::BackForwardNavigation;
+
+    content::PageTransition stippedTransition = content::PageTransitionStripQualifier(transition);
+
+    switch (stippedTransition) {
+    case content::PAGE_TRANSITION_LINK:
+        return WebContentsAdapterClient::LinkClickedNavigation;
+    case content::PAGE_TRANSITION_TYPED:
+        return WebContentsAdapterClient::TypedNavigation;
+    case content::PAGE_TRANSITION_FORM_SUBMIT:
+        return WebContentsAdapterClient::FormSubmittedNavigation;
+    case content::PAGE_TRANSITION_RELOAD:
+        return WebContentsAdapterClient::ReloadNavigation;
+    default:
+        return WebContentsAdapterClient::OtherNavigation;
+    }
+}
+
+}
+
+int NetworkDelegateQt::OnBeforeURLRequest(net::URLRequest *request, const net::CompletionCallback &callback, GURL *)
+{
+    Q_ASSERT(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
+    const content::ResourceRequestInfo *info = content::ResourceRequestInfo::ForRequest(request);
+    int renderProcessId;
+    int renderViewId;
+    if (!info || !info->GetRenderViewForRequest(request, &renderProcessId, &renderViewId))
+        // Abort the request if it has no associated render info / render view.
+        return net::ERR_ABORTED;
+
+    ResourceType::Type resourceType = info->GetResourceType();
+    // Only intercept MAIN_FRAME and SUB_FRAME.
+    if (!ResourceType::IsFrame(resourceType))
+        return net::OK;
+
+    // Track active requests since |callback| and |new_url| are valid
+    // only until OnURLRequestDestroyed is called for this request.
+    m_activeRequests.insert(request);
+
+    int navigationType = pageTransitionToNavigationType(info->GetPageTransition());
+
+    RequestParams params = {
+        toQt(request->url()),
+        resourceType == ResourceType::MAIN_FRAME,
+        navigationType,
+        renderProcessId,
+        renderViewId
+    };
+
+    content::BrowserThread::PostTask(
+                content::BrowserThread::UI,
+                FROM_HERE,
+                base::Bind(&NetworkDelegateQt::NotifyNavigationRequestedOnUIThread,
+                           base::Unretained(this),
+                           request,
+                           params,
+                           callback)
+                );
+
+    // We'll run the callback after we notified the UI thread.
+    return net::ERR_IO_PENDING;
+}
+
+void NetworkDelegateQt::OnURLRequestDestroyed(net::URLRequest* request)
+{
+    m_activeRequests.remove(request);
+}
+
+void NetworkDelegateQt::CompleteURLRequestOnIOThread(net::URLRequest *request,
+                                                     int navigationRequestAction,
+                                                     const net::CompletionCallback &callback)
+{
+    Q_ASSERT(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
+    if (!m_activeRequests.contains(request))
+        return;
+
+    int error = net::OK;
+    switch (navigationRequestAction) {
+    case WebContentsAdapterClient::AcceptRequest:
+        error = net::OK;
+        break;
+    case WebContentsAdapterClient::IgnoreRequest:
+        error = net::OK;
+        // We can cancel the request here since we are on the IO thread.
+        request->Cancel();
+        break;
+    default:
+        error = net::ERR_FAILED;
+        Q_UNREACHABLE();
+    }
+    callback.Run(error);
+}
+
+void NetworkDelegateQt::NotifyNavigationRequestedOnUIThread(net::URLRequest *request,
+                                                            RequestParams params,
+                                                            const net::CompletionCallback &callback)
+{
+    Q_ASSERT(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+
+    int navigationRequestAction = WebContentsAdapterClient::AcceptRequest;
+    content::RenderViewHost *rvh = content::RenderViewHost::FromID(params.renderProcessId, params.renderViewId);
+
+    if (rvh) {
+        content::WebContents *webContents = content::WebContents::FromRenderViewHost(rvh);
+        WebContentsAdapterClient *client = WebContentsViewQt::from(webContents->GetView())->client();
+        client->navigationRequested(params.navigationType, params.url, navigationRequestAction, params.isMainFrameRequest);
+    }
+
+    // Run the callback on the IO thread.
+    content::BrowserThread::PostTask(
+                content::BrowserThread::IO,
+                FROM_HERE,
+                base::Bind(&NetworkDelegateQt::CompleteURLRequestOnIOThread,
+                           base::Unretained(this),
+                           request,
+                           navigationRequestAction,
+                           callback)
+                );
+}