[Qt] Enable QML handling of crashed/unresponsive QtWebProcess

https://bugs.webkit.org/show_bug.cgi?id=108474

Forward the processDidCrash, didRelaunchProcess, processDidBecomeUnresponsive
and processDidBecomeResponsive signals to QML's WebView.experimental.

Reviewed by Jocelyn Turcotte.

* UIProcess/API/qt/qquickwebview.cpp:
(QQuickWebViewPrivate::processDidCrash):
(QQuickWebViewPrivate::didRelaunchProcess):
(QQuickWebViewPrivate::processDidBecomeUnresponsive):
(QQuickWebViewPrivate::processDidBecomeResponsive):
* UIProcess/API/qt/qquickwebview_p.h:
* UIProcess/API/qt/qquickwebview_p_p.h:
(QQuickWebViewPrivate):

NOTE: This is the initial iteration of the patch attached to upstream
bug report 108474, i.e.:
https://bug-108474-attachments.webkit.org/attachment.cgi?id=185771
The actually committed version is incompatible with the status of
QtWebKit stable as the architecture changed too much.

Change-Id: I91d28dde2774fd1487a96ac36a14b522ffb7756c
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@153580 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

3 files changed, 31 insertions, 0 deletions

diff --git a/Source/WebKit2/UIProcess/API/qt/qquickwebview.cpp b/Source/WebKit2/UIProcess/API/qt/qquickwebview.cpp
index c3e372b54..053987b3e 100644
--- a/Source/WebKit2/UIProcess/API/qt/qquickwebview.cpp
+++ b/Source/WebKit2/UIProcess/API/qt/qquickwebview.cpp
@@ -484,16 +484,40 @@ void QQuickWebViewPrivate::processDidCrash()
         loadProgressDidChange(100);
         emit q->loadingChanged(&loadRequest);
     }
+
+    emit q->experimental()->processDidCrash();
 }
 
 void QQuickWebViewPrivate::didRelaunchProcess()
 {
+    Q_Q(QQuickWebView);
+
     qWarning("WARNING: The web process has been successfully restarted.");
 
     webPageProxy->drawingArea()->setSize(viewSize(), IntSize());
 
     updateViewportSize();
     updateUserScripts();
+
+    emit q->experimental()->didRelaunchProcess();
+}
+
+void QQuickWebViewPrivate::processDidBecomeUnresponsive()
+{
+    Q_Q(QQuickWebView);
+
+    qWarning("WARNING: The web process has become unresponsive.");
+
+    emit q->experimental()->processDidBecomeUnresponsive();
+}
+
+void QQuickWebViewPrivate::processDidBecomeResponsive()
+{
+    Q_Q(QQuickWebView);
+
+    qWarning("WARNING: The web process has become responsive.");
+
+    emit q->experimental()->processDidBecomeResponsive();
 }
 
 PassOwnPtr<DrawingAreaProxy> QQuickWebViewPrivate::createDrawingAreaProxy()
diff --git a/Source/WebKit2/UIProcess/API/qt/qquickwebview_p.h b/Source/WebKit2/UIProcess/API/qt/qquickwebview_p.h
index 1b372fa40..894224c7b 100644
--- a/Source/WebKit2/UIProcess/API/qt/qquickwebview_p.h
+++ b/Source/WebKit2/UIProcess/API/qt/qquickwebview_p.h
@@ -374,6 +374,11 @@ Q_SIGNALS:
     void preferredMinimumContentsWidthChanged();
     void remoteInspectorUrlChanged();
 
+    void processDidCrash();
+    void didRelaunchProcess();
+    void processDidBecomeUnresponsive();
+    void processDidBecomeResponsive();
+
 private:
     QQuickWebViewExperimental(QQuickWebView* webView, QQuickWebViewPrivate* webViewPrivate);
     QQuickWebView* q_ptr;
diff --git a/Source/WebKit2/UIProcess/API/qt/qquickwebview_p_p.h b/Source/WebKit2/UIProcess/API/qt/qquickwebview_p_p.h
index adedb6a31..2a46d5cdc 100644
--- a/Source/WebKit2/UIProcess/API/qt/qquickwebview_p_p.h
+++ b/Source/WebKit2/UIProcess/API/qt/qquickwebview_p_p.h
@@ -133,6 +133,8 @@ public:
     virtual void pageDidRequestScroll(const QPoint& pos) { }
     void processDidCrash();
     void didRelaunchProcess();
+    void processDidBecomeUnresponsive();
+    void processDidBecomeResponsive();
     PassOwnPtr<WebKit::DrawingAreaProxy> createDrawingAreaProxy();
     void handleDownloadRequest(WebKit::DownloadProxy*);