Instant: Use only one hidden WebContents per profile.

chrome/browser/instant/instant_overlay.cc

 // Copyright 2013 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 "chrome/browser/instant/instant_overlay.h"
 
 #include "base/auto_reset.h"
-#include "base/supports_user_data.h"
-#include "chrome/browser/ui/search/search.h"
+#include "chrome/browser/instant/instant_controller.h"
 #include "content/public/browser/web_contents.h"
 
-namespace {
-
-int kUserDataKey;
-
-class InstantOverlayUserData : public base::SupportsUserData::Data {
- public:
-  explicit InstantOverlayUserData(InstantOverlay* overlay)
-      : overlay_(overlay) {}
-
-  virtual InstantOverlay* overlay() const { return overlay_; }
-
- private:
-  virtual ~InstantOverlayUserData() {}
-
-  InstantOverlay* const overlay_;
-
-  DISALLOW_COPY_AND_ASSIGN(InstantOverlayUserData);
-};
-
-}  // namespace
-
-// static
-InstantOverlay* InstantOverlay::FromWebContents(
-    const content::WebContents* web_contents) {
-  InstantOverlayUserData* data = static_cast<InstantOverlayUserData*>(
-      web_contents->GetUserData(&kUserDataKey));
-  return data ? data->overlay() : NULL;
-}
-
 InstantOverlay::InstantOverlay(InstantController* controller,
-                               const std::string& instant_url)
-    : InstantPage(controller),
-      loader_(ALLOW_THIS_IN_INITIALIZER_LIST(this)),
-      instant_url_(instant_url),
-      is_stale_(false),
+                               InstantService* service,
+                               scoped_ptr<content::WebContents> contents)
+    : InstantWebContentsContainer(controller, service),
+      controller_(controller),
       is_pointer_down_from_activate_(false) {
+  contents_ = contents.Pass();
+  SetUpContents();
+  page_.set_supports_instant(true);
 }
 
 InstantOverlay::~InstantOverlay() {
 }
 
-void InstantOverlay::InitContents(Profile* profile,
-                                  const content::WebContents* active_tab) {
-  loader_.Init(GURL(instant_url_), profile, active_tab,
-               base::Bind(&InstantOverlay::HandleStalePage,
-                           base::Unretained(this)));
-  SetContents(loader_.contents());
-  contents()->SetUserData(&kUserDataKey, new InstantOverlayUserData(this));
-  loader_.Load();
+scoped_ptr<content::WebContents> InstantOverlay::ReleaseContents() {
+  TearDownContents();
+  return contents_.Pass();
 }
 
-scoped_ptr<content::WebContents> InstantOverlay::ReleaseContents() {
-  contents()->RemoveUserData(&kUserDataKey);
-  SetContents(NULL);
-  return loader_.ReleaseContents();
-}
-
-void InstantOverlay::DidNavigate(
-    const history::HistoryAddPageArgs& add_page_args) {
-  last_navigation_ = add_page_args;
-}
-
-bool InstantOverlay::IsUsingLocalPreview() const {
-  return instant_url_ == chrome::search::kLocalOmniboxPopupURL;
-}
-
-void InstantOverlay::Update(const string16& text,
-                            size_t selection_start,
-                            size_t selection_end,
-                            bool verbatim) {
-  last_navigation_ = history::HistoryAddPageArgs();
-  InstantPage::Update(text, selection_start, selection_end, verbatim);
-}
-
-bool InstantOverlay::ShouldProcessRenderViewCreated() {
-  return true;
-}
-
-bool InstantOverlay::ShouldProcessRenderViewGone() {
-  return true;
-}
-
-bool InstantOverlay::ShouldProcessAboutToNavigateMainFrame() {
-  return true;
-}
-
-bool InstantOverlay::ShouldProcessSetSuggestions() {
-  return true;
-}
-
-bool InstantOverlay::ShouldProcessShowInstantOverlay() {
-  return true;
-}
-
-bool InstantOverlay::ShouldProcessNavigateToURL() {
-  return true;
-}
-
-void InstantOverlay::OnSwappedContents() {
-  contents()->RemoveUserData(&kUserDataKey);
-  SetContents(loader_.contents());
-  contents()->SetUserData(&kUserDataKey, new InstantOverlayUserData(this));
-  instant_controller()->SwappedOverlayContents();
-}
-
-void InstantOverlay::OnFocus() {
-  // The preview is getting focus. Equivalent to it being clicked.
-  base::AutoReset<bool> reset(&is_pointer_down_from_activate_, true);
-  instant_controller()->FocusedOverlayContents();
-}
-
-void InstantOverlay::OnMouseDown() {
-  is_pointer_down_from_activate_ = true;
-}
-
-void InstantOverlay::OnMouseUp() {
-  if (is_pointer_down_from_activate_) {
-    is_pointer_down_from_activate_ = false;
-    instant_controller()->CommitIfPossible(INSTANT_COMMIT_FOCUS_LOST);
-  }
+void InstantOverlay::SwapTabContents(content::WebContents* old_contents,
+                                     content::WebContents* new_contents) {
+  InstantWebContentsContainer::SwapTabContents(old_contents, new_contents);
+  controller_->SwappedOverlayContents();
 }
 
 content::WebContents* InstantOverlay::OpenURLFromTab(
     content::WebContents* source,
     const content::OpenURLParams& params) {
-  if (!supports_instant()) {
-    // If the page doesn't yet support Instant, it hasn't fully loaded.
-    // This is a redirect that we should allow. http://crbug.com/177948
-    content::NavigationController::LoadURLParams load_params(params.url);
-    load_params.transition_type = params.transition;
-    load_params.referrer = params.referrer;
-    load_params.extra_headers = params.extra_headers;
-    load_params.is_renderer_initiated = params.is_renderer_initiated;
-    load_params.transferred_global_request_id =
-        params.transferred_global_request_id;
-    load_params.is_cross_site_redirect = params.is_cross_site_redirect;
+  if (!page_.supports_instant())
+    return InstantWebContentsContainer::OpenURLFromTab(source, params);
 
-    contents()->GetController().LoadURLWithParams(load_params);
-    return contents();
+  // Allow the navigation to continue if we are able to commit the overlay.
+  //
+  // Cache the overlay contents since committing it will cause the contents
+  // to be released (and be set to NULL).
+  content::WebContents* overlay = contents();
+  if (controller_->CommitIfPossible(INSTANT_COMMIT_NAVIGATED)) {
+    // If the commit was successful, the overlay's delegate should be the tab
+    // strip, which will be able to handle the navigation.
+    DCHECK_NE(this, overlay->GetDelegate());
+    return overlay->GetDelegate()->OpenURLFromTab(source, params);
   }
 
-  // We will allow the navigate to continue if we are able to commit the
-  // overlay.
-  //
-  // First, cache the overlay contents since committing it will cause the
-  // contents to be released (and be set to NULL).
-  content::WebContents* overlay = contents();
-  if (instant_controller()->CommitIfPossible(INSTANT_COMMIT_NAVIGATED)) {
-    // If the commit was successful, the overlay's delegate should be the tab
-    // strip, which will be able to handle the navigation.
-    DCHECK_NE(&loader_, overlay->GetDelegate());
-    return overlay->GetDelegate()->OpenURLFromTab(source, params);
-  }
   return NULL;
 }
 
-void InstantOverlay::HandleStalePage() {
-  is_stale_ = true;
-  instant_controller()->ReloadOverlayIfStale();
+void InstantOverlay::CloseContents(content::WebContents* /* source */) {
+  controller_->RenderViewGone(contents());
 }
+
+void InstantOverlay::LostCapture() {
+  HandleMouseUp();
+}
+
+void InstantOverlay::WebContentsFocused(content::WebContents* /* contents */) {
+  // The overlay is getting focus. Equivalent to it being clicked.
+  base::AutoReset<bool> reset(&is_pointer_down_from_activate_, true);
+  controller_->FocusedOverlayContents();
+}
+
+void InstantOverlay::HandleMouseDown() {
+  is_pointer_down_from_activate_ = true;
+}
+
+void InstantOverlay::HandleMouseUp() {
+  if (is_pointer_down_from_activate_) {
+    is_pointer_down_from_activate_ = false;
+    controller_->CommitIfPossible(INSTANT_COMMIT_FOCUS_LOST);
+  }
+}
+
+void InstantOverlay::HandlePointerActivate() {
+  HandleMouseDown();
+}
+
+void InstantOverlay::HandleGestureEnd() {
+  HandleMouseUp();
+}
+
+void InstantOverlay::DragEnded() {
+  HandleMouseUp();
+}