Android WebView visited link highlighting implementation part 1

android_webview/browser/renderer_host/aw_render_view_host_ext.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "android_webview/browser/renderer_host/aw_render_view_host_ext.h"
 
 #include "android_webview/common/render_view_messages.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/callback.h"
 #include "base/logging.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/common/frame_navigate_params.h"
 
 namespace android_webview {
 
 AwRenderViewHostExt::AwRenderViewHostExt(content::WebContents* contents,
                                          Client* client)
     : content::WebContentsObserver(contents),
       has_new_hit_test_data_(false),
+      visitedlink_master_(contents->GetBrowserContext(), this),
       client_(client) {
+  visitedlink_master_.Init();
 }
 
-AwRenderViewHostExt::~AwRenderViewHostExt() {}
+AwRenderViewHostExt::~AwRenderViewHostExt() {
+}
 
 void AwRenderViewHostExt::DocumentHasImages(DocumentHasImagesResult result) {
   DCHECK(CalledOnValidThread());
   if (!web_contents()->GetRenderViewHost()) {
     result.Run(false);
     return;
   }
   static int next_id = 1;
   int this_id = next_id++;
   pending_document_has_images_requests_[this_id] = result;
@@ skipping 29 matching lines @@
 void AwRenderViewHostExt::RenderViewGone(base::TerminationStatus status) {
   DCHECK(CalledOnValidThread());
   for (std::map<int, DocumentHasImagesResult>::iterator pending_req =
            pending_document_has_images_requests_.begin();
        pending_req != pending_document_has_images_requests_.end();
       ++pending_req) {
     pending_req->second.Run(false);
   }
 }
 
+void AwRenderViewHostExt::DidNavigateAnyFrame(
+    const content::LoadCommittedDetails& details,
+    const content::FrameNavigateParams& params) {
+  DCHECK(CalledOnValidThread());
+
+  visitedlink_master_.AddURL(params.base_url);
+}
+
 bool AwRenderViewHostExt::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(AwRenderViewHostExt, message)
     IPC_MESSAGE_HANDLER(AwViewHostMsg_DocumentHasImagesResponse,
                         OnDocumentHasImagesResponse)
     IPC_MESSAGE_HANDLER(AwViewHostMsg_UpdateHitTestData,
                         OnUpdateHitTestData)
     IPC_MESSAGE_HANDLER(AwViewHostMsg_PictureUpdated,
                         OnPictureUpdated)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
   return handled ? true : WebContentsObserver::OnMessageReceived(message);
 }
 
+bool AwRenderViewHostExt::PersistToDisk() const {
+  // Persistence of VisitedLink database is handled by the embedding app.

[joth, 2013/01/14 23:40:35]

would it be possible/useful to mention which function/call-path provides this
functionality for webview?

+  return false;
+}
+
+bool AwRenderViewHostExt::AreEquivalentContexts(
+    content::BrowserContext* context1,
+    content::BrowserContext* context2) {
+  DCHECK(CalledOnValidThread());
+
+  // Raw pointer comparison since Android WebView does not have sub-contexts
+  // like incognito.
+  return context1 == context2;
+}
+
+void AwRenderViewHostExt::RebuildTable(
+    const scoped_refptr<URLEnumerator>& enumerator) {
+  DCHECK(CalledOnValidThread());
+
+  // Android WebView rebuilds from WebChromeClient which can change in the
+  // lifetime of this WebView and may not yet be set here. This initialization
+  // path is not used.

[joth, 2013/01/14 23:40:35]

(ditto, ish. i.e. how does the restore from disk case flow happen in webview?)

+  enumerator->OnComplete(true);
+}
+
 void AwRenderViewHostExt::OnDocumentHasImagesResponse(int msg_id,
                                                       bool has_images) {
   DCHECK(CalledOnValidThread());
   std::map<int, DocumentHasImagesResult>::iterator pending_req =
       pending_document_has_images_requests_.find(msg_id);
   if (pending_req == pending_document_has_images_requests_.end()) {
     DLOG(WARNING) << "unexpected DocumentHasImages Response: " << msg_id;
   } else {
     pending_req->second.Run(has_images);
     pending_document_has_images_requests_.erase(pending_req);
   }
 }
 
 void AwRenderViewHostExt::OnUpdateHitTestData(
     const AwHitTestData& hit_test_data) {
   DCHECK(CalledOnValidThread());
   last_hit_test_data_ = hit_test_data;
   has_new_hit_test_data_ = true;
 }
 
 void AwRenderViewHostExt::OnPictureUpdated() {
   if (client_)
     client_->OnPictureUpdated(web_contents()->GetRenderProcessHost()->GetID(),
                               routing_id());
 }
 
 }  // namespace android_webview