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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.
#ifndef CHROME_BROWSER_UI_BROWSER_INSTANT_CONTROLLER_H_
#define CHROME_BROWSER_UI_BROWSER_INSTANT_CONTROLLER_H_
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/prefs/pref_change_registrar.h"
#include "chrome/browser/ui/search/instant_controller.h"
#include "chrome/browser/ui/search/instant_unload_handler.h"
#include "chrome/browser/ui/search/search_model_observer.h"
#include "net/base/network_change_notifier.h"
#include "ui/base/window_open_disposition.h"
class Browser;
struct InstantSuggestion;
class Profile;
namespace content {
class WebContents;
}
namespace gfx {
class Rect;
}
class BrowserInstantController
: public SearchModelObserver,
public net::NetworkChangeNotifier::NetworkChangeObserver {
public:
explicit BrowserInstantController(Browser* browser);
virtual ~BrowserInstantController();
// If |url| is the new tab page URL, set |target_contents| to the preloaded
// NTP contents from InstantController. If |source_contents| is not NULL, we
// replace it with the new |target_contents| in the tabstrip and delete
// |source_contents|. Otherwise, the caller owns |target_contents| and is
// responsible for inserting it into the tabstrip.
//
// Returns true if and only if we update |target_contents|.
bool MaybeSwapInInstantNTPContents(
const GURL& url,
content::WebContents* source_contents,
content::WebContents** target_contents);
// Commits the current Instant, returning true on success. This is intended
// for use from OpenCurrentURL.
bool OpenInstant(WindowOpenDisposition disposition, const GURL& url);
// Returns the Profile associated with the Browser that owns this object.
Profile* profile() const;
// Returns the InstantController or NULL if there is no InstantController for
// this BrowserInstantController.
InstantController* instant() { return &instant_; }
// Invoked by |instant_| to commit the |overlay| by merging it into the active
// tab or adding it as a new tab.
void CommitInstant(scoped_ptr<content::WebContents> overlay, bool in_new_tab);
// Invoked by |instant_| to autocomplete the |suggestion| into the omnibox.
void SetInstantSuggestion(const InstantSuggestion& suggestion);
// Invoked by |instant_| to get the bounds that the overlay is placed at,
// in screen coordinates.
gfx::Rect GetInstantBounds();
// Invoked by |instant_| to notify that the overlay gained focus, usually due
// to the user clicking on it.
void InstantOverlayFocused();
// Invoked by |instant_| to give the omnibox focus, with the option of making
// the caret invisible.
void FocusOmnibox(bool caret_visibility);
// Invoked by |instant_| to get the currently active tab, over which the
// overlay would be shown.
content::WebContents* GetActiveWebContents() const;
// Invoked by |browser_| when the active tab changes.
void ActiveTabChanged();
// Invoked by |browser_| when the active tab is about to be deactivated.
void TabDeactivated(content::WebContents* contents);
// Invoked by the InstantController when it wants to open a URL.
void OpenURL(const GURL& url,
content::PageTransition transition,
WindowOpenDisposition disposition);
// Sets the stored omnibox bounds.
void SetOmniboxBounds(const gfx::Rect& bounds);
// Updates the location bar to reflect the active page contents Instant
// support state.
void UpdateLocationBar();
// Notifies |instant_| to toggle voice search.
void ToggleVoiceSearch();
private:
// Sets the value of |instant_| based on value from profile. Invoked
// on pref change.
void ResetInstant(const std::string& pref_name);
// Overridden from search::SearchModelObserver:
virtual void ModelChanged(const SearchModel::State& old_state,
const SearchModel::State& new_state) OVERRIDE;
// Called when the default search provider changes. Revokes the searchbox API
// privileges for any existing WebContents (that belong to the erstwhile
// default search provider) by simply reloading all such WebContents. This
// ensures that they are reloaded in a non-privileged renderer process.
void OnDefaultSearchProviderChanged(const std::string& pref_name);
// Overridden from net::NetworkChangeNotifier::NetworkChangeObserver:
virtual void OnNetworkChanged(net::NetworkChangeNotifier::ConnectionType type)
OVERRIDE;
// Replaces the contents at tab |index| with |new_contents| and deletes the
// existing contents.
void ReplaceWebContentsAt(int index,
scoped_ptr<content::WebContents> new_contents);
Browser* const browser_;
InstantController instant_;
InstantUnloadHandler instant_unload_handler_;
PrefChangeRegistrar profile_pref_registrar_;
DISALLOW_COPY_AND_ASSIGN(BrowserInstantController);
};
#endif // CHROME_BROWSER_UI_BROWSER_INSTANT_CONTROLLER_H_
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