On title and favicon change event on webview:

-titlechange
-faviconchange

Author: janRucka

extensions/browser/extension_event_histogram_value.h

@@ -424,6 +424,8 @@ enum HistogramValue {
   CLIPBOARD_ON_CLIPBOARD_DATA_CHANGED,
   VIRTUAL_KEYBOARD_PRIVATE_ON_KEYBOARD_CLOSED,
   FILE_MANAGER_PRIVATE_ON_APPS_UPDATED,
+  WEB_VIEW_INTERNAL_ON_TITLE_CHANGE,
+  WEB_VIEW_INTERNAL_ON_FAVICON_CHANGE,
   // Last entry: Add new entries above, then run:
   // python tools/metrics/histograms/update_extension_histograms.py
   ENUM_BOUNDARY

extensions/browser/guest_view/guest_view_events.cc

@@ -81,6 +81,8 @@ class EventMap {
         {webview::kEventErrorOccurred,
          events::WEB_VIEW_INTERNAL_ON_ERROR_OCCURRED},
         {webview::kEventSendHeaders, events::WEB_VIEW_INTERNAL_ON_SEND_HEADERS},
+        {webview::kEventFaviconChange, events::WEB_VIEW_INTERNAL_ON_FAVICON_CHANGE},
+        {webview::kEventTitleChange, events::WEB_VIEW_INTERNAL_ON_TITLE_CHANGE},
     };
     for (const auto& name_and_value : names_and_values) {
       values_[name_and_value.name] = name_and_value.value;

extensions/browser/guest_view/web_view/web_view_constants.cc

@@ -30,6 +30,7 @@ const char kEventDialog[] = "webViewInternal.onDialog";
 const char kEventDropLink[] = "webViewInternal.onDropLink";
 const char kEventExit[] = "webViewInternal.onExit";
 const char kEventExitFullscreen[] = "webViewInternal.onExitFullscreen";
+const char kEventFaviconChange[] = "webViewInternal.onFaviconChange";
 const char kEventFindReply[] = "webViewInternal.onFindReply";
 const char kEventFrameNameChanged[] = "webViewInternal.onFrameNameChanged";
 const char kEventHeadersReceived[] = "webViewInternal.onHeadersReceived";
@@ -45,6 +46,7 @@ const char kEventPermissionRequest[] = "webViewInternal.onPermissionRequest";
 const char kEventResponseStarted[] = "webViewInternal.onResponseStarted";
 const char kEventResponsive[] = "webViewInternal.onResponsive";
 const char kEventSizeChanged[] = "webViewInternal.onSizeChanged";
+const char kEventTitleChange[] = "webViewInternal.onTitleChange";
 const char kEventUnresponsive[] = "webViewInternal.onUnresponsive";
 const char kEventZoomChange[] = "webViewInternal.onZoomChange";
 
@@ -63,6 +65,7 @@ const char kWebViewEventPrefix[] = "webViewInternal.";
 // Parameters/properties on events.
 const char kContextMenuItems[] = "items";
 const char kDefaultPromptText[] = "defaultPromptText";
+const char kFaviconUrl[] = "faviconUrl";
 const char kFindSearchText[] = "searchText";
 const char kFindFinalUpdate[] = "finalUpdate";
 const char kInitialHeight[] = "initialHeight";
@@ -98,6 +101,7 @@ const char kRequestId[] = "requestId";
 const char kRequestInfo[] = "requestInfo";
 const char kSourceId[] = "sourceId";
 const char kTargetURL[] = "targetUrl";
+const char kTitle[] = "title";
 const char kWindowID[] = "windowId";
 const char kWindowOpenDisposition[] = "windowOpenDisposition";
 const char kOldZoomFactor[] = "oldZoomFactor";

extensions/browser/guest_view/web_view/web_view_constants.h

@@ -36,6 +36,7 @@ extern const char kEventDialog[];
 extern const char kEventDropLink[];
 extern const char kEventExit[];
 extern const char kEventExitFullscreen[];
+extern const char kEventFaviconChange[];
 extern const char kEventFindReply[];
 extern const char kEventFrameNameChanged[];
 extern const char kEventHeadersReceived[];
@@ -51,6 +52,7 @@ extern const char kEventPermissionRequest[];
 extern const char kEventResponseStarted[];
 extern const char kEventResponsive[];
 extern const char kEventSizeChanged[];
+extern const char kEventTitleChange[];
 extern const char kEventUnresponsive[];
 extern const char kEventZoomChange[];
 
@@ -69,6 +71,7 @@ extern const char kWebViewEventPrefix[];
 // Parameters/properties on events.
 extern const char kContextMenuItems[];
 extern const char kDefaultPromptText[];
+extern const char kFaviconUrl[];
 extern const char kFindSearchText[];
 extern const char kFindFinalUpdate[];
 extern const char kInitialHeight[];
@@ -104,6 +107,7 @@ extern const char kRequestId[];
 extern const char kRequestInfo[];
 extern const char kSourceId[];
 extern const char kTargetURL[];
+extern const char kTitle[];
 extern const char kWindowID[];
 extern const char kWindowOpenDisposition[];
 extern const char kOldZoomFactor[];

extensions/browser/guest_view/web_view/web_view_guest.cc

@@ -26,6 +26,7 @@
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/child_process_security_policy.h"
+#include "content/public/browser/favicon_status.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/navigation_handle.h"
@@ -44,6 +45,7 @@
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/common/browser_side_navigation_policy.h"
+#include "content/public/common/favicon_url.h"
 #include "content/public/common/media_stream_request.h"
 #include "content/public/common/page_zoom.h"
 #include "content/public/common/result_codes.h"
@@ -876,6 +878,12 @@ void WebViewGuest::DidFinishNavigation(
       SetZoom(pending_zoom_factor_);
       pending_zoom_factor_ = 0.0;
     }
+
+    if ((int)navigation_handle->GetPageTransition() == (int)ui::PageTransition::PAGE_TRANSITION_AUTO_TOPLEVEL ||
+      (int)navigation_handle->GetPageTransition() & (int)ui::PageTransition::PAGE_TRANSITION_FORWARD_BACK) {
+      FaviconEvent(web_contents()->GetController().GetEntryAtIndex(web_contents()->GetController().GetCurrentEntryIndex())->GetFavicon().url.spec());
+      TitleWasSet(web_contents()->GetController().GetEntryAtIndex(web_contents()->GetController().GetCurrentEntryIndex()), true);
+    }
   }
   std::unique_ptr<base::DictionaryValue> args(new base::DictionaryValue());
   args->SetString(guest_view::kUrl, src_.spec());
@@ -1446,6 +1454,31 @@ void WebViewGuest::RequestToLockMouse(WebContents* web_contents,
           base::Unretained(web_contents)));
 }
 
+void WebViewGuest::FaviconEvent(const std::string& faviconUrl)
+{
+  std::unique_ptr<base::DictionaryValue> args(new base::DictionaryValue());
+  args->SetString(webview::kFaviconUrl, faviconUrl);
+  DispatchEventToView(base::MakeUnique<GuestViewEvent>(webview::kEventFaviconChange,
+    std::move(args)));
+}
+
+void WebViewGuest::DidUpdateFaviconURL(const std::vector<content::FaviconURL>& candidates) {
+  if (!candidates.empty())
+    FaviconEvent(candidates[0].icon_url.spec());
+  else
+    FaviconEvent("");
+}
+
+void WebViewGuest::TitleWasSet(content::NavigationEntry* entry, bool explicit_set) {
+  if (!entry)
+    return;
+
+  std::unique_ptr<base::DictionaryValue> args(new base::DictionaryValue());
+  args->SetString(webview::kTitle, entry->GetTitleForDisplay());
+  DispatchEventToView(base::MakeUnique<GuestViewEvent>(webview::kEventTitleChange,
+    std::move(args)));
+}
+
 void WebViewGuest::LoadURLWithParams(
     const GURL& url,
     const content::Referrer& referrer,

extensions/browser/guest_view/web_view/web_view_guest.h

@@ -26,6 +26,11 @@ namespace blink {
 struct WebFindOptions;
 }  // namespace blink
 
+namespace content {
+class NavigationEntry;
+struct FaviconURL;
+}
+
 namespace extensions {
 
 class WebViewInternalFindFunction;
@@ -259,6 +264,10 @@ class WebViewGuest : public guest_view::GuestView<WebViewGuest>,
                           bool user_gesture,
                           bool last_unlocked_by_target) override;
 
+  void FaviconEvent(const std::string& faviconUrl);
+  void DidUpdateFaviconURL(const std::vector<content::FaviconURL>& candidates) final;
+  void TitleWasSet(content::NavigationEntry* entry, bool explicit_set) final;
+
   // WebContentsObserver implementation.
   void DidStartNavigation(content::NavigationHandle* navigation_handle) final;
   void DidFinishNavigation(content::NavigationHandle* navigation_handle) final;

extensions/renderer/resources/guest_view/web_view/web_view_events.js

@@ -62,6 +62,10 @@ WebViewEvents.EVENTS = {
     handler: 'handleFullscreenExitEvent',
     internal: true
   },
+  'faviconchange': {
+    evt: CreateEvent('webViewInternal.onFaviconChange'),
+    fields: ['faviconUrl']
+  },
   'findupdate': {
     evt: CreateEvent('webViewInternal.onFindReply'),
     fields: [
@@ -139,6 +143,10 @@ WebViewEvents.EVENTS = {
     fields: ['oldHeight', 'oldWidth', 'newHeight', 'newWidth'],
     handler: 'handleSizeChangedEvent'
   },
+  'titlechange': {
+      evt: CreateEvent('webViewInternal.onTitleChange'),
+      fields: ['title']
+  },
   'unresponsive': {
     evt: CreateEvent('webViewInternal.onUnresponsive'),
     fields: ['processId']