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// Copyright 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 "chrome/browser/ui/browser_instant_controller.h"
#include "base/bind.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/extensions/extension_web_ui.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/search/instant_service.h"
#include "chrome/browser/search/instant_service_factory.h"
#include "chrome/browser/search/search.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/browser/ui/omnibox/location_bar.h"
#include "chrome/browser/ui/omnibox/omnibox_popup_model.h"
#include "chrome/browser/ui/omnibox/omnibox_view.h"
#include "chrome/browser/ui/search/instant_ntp.h"
#include "chrome/browser/ui/search/instant_search_prerenderer.h"
#include "chrome/browser/ui/search/search_model.h"
#include "chrome/browser/ui/search/search_tab_helper.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/browser/ui/webui/ntp/app_launcher_handler.h"
#include "chrome/common/url_constants.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/browser/web_contents_view.h"
using content::UserMetricsAction;
namespace {
InstantSearchPrerenderer* GetInstantSearchPrerenderer(Profile* profile) {
DCHECK(profile);
InstantService* instant_service =
InstantServiceFactory::GetForProfile(profile);
return instant_service ? instant_service->instant_search_prerenderer() : NULL;
}
} // namespace
////////////////////////////////////////////////////////////////////////////////
// BrowserInstantController, public:
BrowserInstantController::BrowserInstantController(Browser* browser)
: browser_(browser),
instant_(this),
instant_unload_handler_(browser) {
browser_->search_model()->AddObserver(this);
InstantService* instant_service =
InstantServiceFactory::GetForProfile(profile());
instant_service->OnBrowserInstantControllerCreated();
instant_service->AddObserver(this);
}
BrowserInstantController::~BrowserInstantController() {
browser_->search_model()->RemoveObserver(this);
InstantService* instant_service =
InstantServiceFactory::GetForProfile(profile());
instant_service->RemoveObserver(this);
instant_service->OnBrowserInstantControllerDestroyed();
}
bool BrowserInstantController::MaybeSwapInInstantNTPContents(
const GURL& url,
content::WebContents* source_contents,
content::WebContents** target_contents) {
if (url != GURL(chrome::kChromeUINewTabURL))
return false;
GURL extension_url(url);
if (ExtensionWebUI::HandleChromeURLOverride(&extension_url, profile())) {
// If there is an extension overriding the NTP do not use the Instant NTP.
return false;
}
InstantService* instant_service =
InstantServiceFactory::GetForProfile(profile());
scoped_ptr<content::WebContents> instant_ntp =
instant_service->ReleaseNTPContents();
if (!instant_ntp)
return false;
*target_contents = instant_ntp.get();
if (source_contents) {
// If the Instant NTP hasn't yet committed an entry, we can't call
// CopyStateFromAndPrune. Instead, load the Local NTP URL directly in the
// source contents.
// TODO(sreeram): Always using the local URL is wrong in the case of the
// first tab in a window where we might want to use the remote URL. Fix.
if (!instant_ntp->GetController().CanPruneAllButLastCommitted()) {
source_contents->GetController().LoadURL(chrome::GetLocalInstantURL(
profile()), content::Referrer(), content::PAGE_TRANSITION_GENERATED,
std::string());
*target_contents = source_contents;
} else {
instant_ntp->GetController().CopyStateFromAndPrune(
&source_contents->GetController(), false);
ReplaceWebContentsAt(
browser_->tab_strip_model()->GetIndexOfWebContents(source_contents),
instant_ntp.Pass());
}
} else {
// If the Instant NTP hasn't yet committed an entry, we can't call
// PruneAllButLastCommitted. In that case, there shouldn't be any entries
// to prune anyway.
if (instant_ntp->GetController().CanPruneAllButLastCommitted())
instant_ntp->GetController().PruneAllButLastCommitted();
else
CHECK(!instant_ntp->GetController().GetLastCommittedEntry());
// If |source_contents| is NULL, then the caller is responsible for
// inserting instant_ntp into the tabstrip and will take ownership.
ignore_result(instant_ntp.release());
}
return true;
}
bool BrowserInstantController::OpenInstant(WindowOpenDisposition disposition,
const GURL& url) {
// Unsupported dispositions.
if (disposition == NEW_BACKGROUND_TAB || disposition == NEW_WINDOW ||
disposition == NEW_FOREGROUND_TAB)
return false;
// The omnibox currently doesn't use other dispositions, so we don't attempt
// to handle them. If you hit this DCHECK file a bug and I'll (sky) add
// support for the new disposition.
DCHECK(disposition == CURRENT_TAB) << disposition;
// If we will not be replacing search terms from this URL, don't send to
// InstantController.
const base::string16& search_terms =
chrome::GetSearchTermsFromURL(browser_->profile(), url);
if (search_terms.empty())
return false;
InstantSearchPrerenderer* prerenderer =
GetInstantSearchPrerenderer(profile());
if (prerenderer &&
prerenderer->CanCommitQuery(GetActiveWebContents(), search_terms)) {
// Submit query to render the prefetched results. Browser will swap the
// prerendered contents with the active tab contents.
prerenderer->Commit(search_terms);
return false;
}
return instant_.SubmitQuery(search_terms);
}
Profile* BrowserInstantController::profile() const {
return browser_->profile();
}
void BrowserInstantController::ReplaceWebContentsAt(
int index,
scoped_ptr<content::WebContents> new_contents) {
DCHECK_NE(TabStripModel::kNoTab, index);
scoped_ptr<content::WebContents> old_contents(browser_->tab_strip_model()->
ReplaceWebContentsAt(index, new_contents.release()));
instant_unload_handler_.RunUnloadListenersOrDestroy(old_contents.Pass(),
index);
}
content::WebContents* BrowserInstantController::GetActiveWebContents() const {
return browser_->tab_strip_model()->GetActiveWebContents();
}
void BrowserInstantController::ActiveTabChanged() {
instant_.ActiveTabChanged();
}
void BrowserInstantController::TabDeactivated(content::WebContents* contents) {
instant_.TabDeactivated(contents);
InstantSearchPrerenderer* prerenderer =
GetInstantSearchPrerenderer(profile());
if (prerenderer)
prerenderer->Cancel();
}
void BrowserInstantController::SetOmniboxBounds(const gfx::Rect& bounds) {
instant_.SetOmniboxBounds(bounds);
}
////////////////////////////////////////////////////////////////////////////////
// BrowserInstantController, SearchModelObserver implementation:
void BrowserInstantController::ModelChanged(
const SearchModel::State& old_state,
const SearchModel::State& new_state) {
if (old_state.mode != new_state.mode) {
const SearchMode& new_mode = new_state.mode;
// Record some actions corresponding to the mode change. Note that to get
// the full story, it's necessary to look at other UMA actions as well,
// such as tab switches.
if (new_mode.is_search_results())
content::RecordAction(UserMetricsAction("InstantExtended.ShowSRP"));
else if (new_mode.is_ntp())
content::RecordAction(UserMetricsAction("InstantExtended.ShowNTP"));
instant_.SearchModeChanged(old_state.mode, new_mode);
}
if (old_state.instant_support != new_state.instant_support)
instant_.InstantSupportChanged(new_state.instant_support);
}
////////////////////////////////////////////////////////////////////////////////
// BrowserInstantController, InstantServiceObserver implementation:
void BrowserInstantController::DefaultSearchProviderChanged() {
ReloadTabsInInstantProcess();
}
void BrowserInstantController::GoogleURLUpdated() {
ReloadTabsInInstantProcess();
}
void BrowserInstantController::ReloadTabsInInstantProcess() {
InstantService* instant_service =
InstantServiceFactory::GetForProfile(profile());
if (!instant_service)
return;
TabStripModel* tab_model = browser_->tab_strip_model();
int count = tab_model->count();
for (int index = 0; index < count; ++index) {
content::WebContents* contents = tab_model->GetWebContentsAt(index);
if (!contents)
continue;
// Send new search URLs to the renderer.
content::RenderProcessHost* rph = contents->GetRenderProcessHost();
instant_service->SendSearchURLsToRenderer(rph);
// Reload the contents to ensure that it gets assigned to a non-priviledged
// renderer.
if (!instant_service->IsInstantProcess(rph->GetID()))
continue;
contents->GetController().Reload(false);
}
}
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