Add support for setting password value gated on user's gesture in a page

Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 221 matching lines @@
         platformEventKeyState = platformEventKeyState | WebCore::PlatformEvent::ShiftKey;
     if (webInputEventKeyState & WebInputEvent::ControlKey)
         platformEventKeyState = platformEventKeyState | WebCore::PlatformEvent::CtrlKey;
     if (webInputEventKeyState & WebInputEvent::AltKey)
         platformEventKeyState = platformEventKeyState | WebCore::PlatformEvent::AltKey;
     if (webInputEventKeyState & WebInputEvent::MetaKey)
         platformEventKeyState = platformEventKeyState | WebCore::PlatformEvent::MetaKey;
     return platformEventKeyState;
 }
 
+namespace {
+
+class UserGestureNotifier {
+public:
+    // If a UserGestureIndicator is created for a user gesture during the
+    // lifetime of a UserGestureNotifier and *userGestureObserved is false,
+    // the object will notify the client and set *userGestureObserved to true.
+    UserGestureNotifier(WebAutofillClient*, bool* userGestureObserved);
+    ~UserGestureNotifier();
+
+private:
+    WebAutofillClient* const m_client;
+    bool* const m_userGestureObserved;
+};
+
+UserGestureNotifier::UserGestureNotifier(WebAutofillClient* client, bool* userGestureObserved)
+    : m_client(client)
+    , m_userGestureObserved(userGestureObserved)
+{
+    ASSERT(m_userGestureObserved);
+    if (m_client)
+        UserGestureIndicator::clearProcessedUserGestureInPast();
+}
+
+UserGestureNotifier::~UserGestureNotifier()
+{
+    if (!*m_userGestureObserved && UserGestureIndicator::processedUserGestureInPast()) {
+        *m_userGestureObserved = true;
+        if (m_client)
+            m_client->firstUserGestureObserved();
+    }
+}
+
+} // namespace
+
 // WebView ----------------------------------------------------------------
 
 WebView* WebView::create(WebViewClient* client)
 {
     // Pass the WebViewImpl's self-reference to the caller.
     return WebViewImpl::create(client);
 }
 
 WebViewImpl* WebViewImpl::create(WebViewClient* client)
 {
@@ skipping 113 matching lines @@
     , m_flingSourceDevice(false)
     , m_fullscreenController(FullscreenController::create(this))
     , m_showFPSCounter(false)
     , m_showPaintRects(false)
     , m_showDebugBorders(false)
     , m_continuousPaintingEnabled(false)
     , m_showScrollBottleneckRects(false)
     , m_baseBackgroundColor(Color::white)
     , m_backgroundColorOverride(Color::transparent)
     , m_zoomFactorOverride(0)
+    , m_userGestureObserved(false)
 {
     Page::PageClients pageClients;
     pageClients.chromeClient = &m_chromeClientImpl;
     pageClients.contextMenuClient = &m_contextMenuClientImpl;
     pageClients.editorClient = &m_editorClientImpl;
     pageClients.dragClient = &m_dragClientImpl;
     pageClients.inspectorClient = &m_inspectorClientImpl;
     pageClients.backForwardClient = &m_backForwardClientImpl;
     pageClients.spellCheckerClient = &m_spellCheckerClientImpl;
     pageClients.storageClient = &m_storageClientImpl;
@@ skipping 1411 matching lines @@
 
 bool WebViewImpl::hasVerticalScrollbar()
 {
     return mainFrameImpl()->frameView()->verticalScrollbar();
 }
 
 const WebInputEvent* WebViewImpl::m_currentInputEvent = 0;
 
 bool WebViewImpl::handleInputEvent(const WebInputEvent& inputEvent)
 {
+    UserGestureNotifier notifier(m_autofillClient, &m_userGestureObserved);
+
     TRACE_EVENT0("input", "WebViewImpl::handleInputEvent");
     // If we've started a drag and drop operation, ignore input events until
     // we're done.
     if (m_doingDragAndDrop)
         return true;
 
     if (m_devToolsAgent && m_devToolsAgent->handleInputEvent(m_page.get(), inputEvent))
         return true;
 
     // Report the event to be NOT processed by WebKit, so that the browser can handle it appropriately.
@@ skipping 1311 matching lines @@
     m_dragOperation = WebDragOperationNone;
     m_currentDragData = nullptr;
 }
 
 void WebViewImpl::dragTargetDrop(const WebPoint& clientPoint,
                                  const WebPoint& screenPoint,
                                  int keyModifiers)
 {
     ASSERT(m_currentDragData);
 
+    UserGestureNotifier notifier(m_autofillClient, &m_userGestureObserved);
+
     // If this webview transitions from the "drop accepting" state to the "not
     // accepting" state, then our IPC message reply indicating that may be in-
     // flight, or else delayed by javascript processing in this webview.  If a
     // drop happens before our IPC reply has reached the browser process, then
     // the browser forwards the drop to this webview.  So only allow a drop to
     // proceed if our webview m_dragOperation state is not DragOperationNone.
 
     if (m_dragOperation == WebDragOperationNone) { // IPC RACE CONDITION: do not allow this drop.
         dragTargetDragLeave();
         return;
@@ skipping 296 matching lines @@
 
 void WebViewImpl::didCommitLoad(bool isNewNavigation, bool isNavigationWithinPage)
 {
     if (isNewNavigation && !isNavigationWithinPage)
         m_pageScaleConstraintsSet.setNeedsReset(true);
 
     // Make sure link highlight from previous page is cleared.
     m_linkHighlights.clear();
     endActiveFlingAnimation();
     resetSavedScrollAndScaleState();
+    m_userGestureObserved = false;
 }
 
 void WebViewImpl::willInsertBody(WebFrameImpl* webframe)
 {
     if (webframe != mainFrameImpl())
         return;
 
     // If we get to the <body> tag and we have no pending stylesheet and import load, we
     // can be fairly confident we'll have something sensible to paint soon and
     // can turn off deferred commits.
@@ skipping 539 matching lines @@
     const PageScaleConstraints& constraints = m_pageScaleConstraintsSet.pageDefinedConstraints();
 
     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
         return false;
 
     return mainFrameImpl()->frameView()->layoutSize().width() == m_size.width
         || (constraints.minimumScale == constraints.maximumScale && constraints.minimumScale != -1);
 }
 
 } // namespace blink