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// 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.
#ifndef CHROME_BROWSER_UI_VIEWS_SEARCH_VIEW_CONTROLLER_H_
#define CHROME_BROWSER_UI_VIEWS_SEARCH_VIEW_CONTROLLER_H_
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/ui/search/search_model_observer.h"
#include "ui/compositor/layer_animation_observer.h"
class ContentsContainer;
class LocationBarContainer;
class TabContents;
class ToolbarView;
namespace chrome {
namespace search {
class SearchModel;
class ToolbarSearchAnimator;
}
}
namespace content {
class BrowserContext;
class WebContents;
}
namespace internal {
class OmniboxPopupContainer;
}
namespace views {
class ImageView;
class Label;
class View;
class WebView;
}
// SearchViewController maintains the search overlay (native new tab page).
// To avoid ordering dependencies this class listens directly to the
// SearchModel of the active tab. BrowserView is responsible for telling this
// class when the active tab changes.
class SearchViewController
: public chrome::search::SearchModelObserver,
public ui::ImplicitAnimationObserver {
friend class internal::OmniboxPopupContainer;
friend class SearchViewControllerTest;
public:
SearchViewController(
content::BrowserContext* browser_context,
ContentsContainer* contents_container,
chrome::search::ToolbarSearchAnimator* toolbar_search_animator,
ToolbarView* toolbar_view);
virtual ~SearchViewController();
// Provides a host parent view for the omnibox popup.
views::View* omnibox_popup_parent();
// Set by host to facilitate proper view/layer stacking.
void set_location_bar_container(
LocationBarContainer* location_bar_container) {
location_bar_container_ = location_bar_container;
}
// Sets the active tab.
void SetTabContents(TabContents* tab_contents);
// Stacks the overlay at the top.
void StackAtTop();
// Invoked when the instant preview is ready to be shown.
void InstantReady();
// chrome::search::SearchModelObserver overrides:
virtual void ModeChanged(const chrome::search::Mode& old_mode,
const chrome::search::Mode& new_mode) OVERRIDE;
protected:
// ui::ImplicitAnimationObserver overrides:
virtual void OnImplicitAnimationsCompleted() OVERRIDE;
private:
enum State {
// Search/ntp is not visible.
STATE_NOT_VISIBLE,
// Layout for the new tab page.
STATE_NTP,
// Animating between STATE_NTP and STATE_SUGGESTIONS.
STATE_NTP_ANIMATING,
// Search layout. This is only used when the suggestions UI is visible.
STATE_SUGGESTIONS,
};
// Invokes SetState() based on the search model and omnibox.
void UpdateState();
// Updates the views and animations. May do any of the following: create the
// views, start an animation, or destroy the views. What happens is determined
// from the current state of the SearchModel.
void SetState(State state);
// Test support.
State state() const { return state_; }
// Starts the animation.
void StartAnimation();
// Create the various views and installs them as an overlay on
// |contents_container_|. |state| is used to determine visual style
// of the created views.
void CreateViews(State state);
// Returns the logo image view, or a name label if an image is not available.
views::View* GetLogoView() const;
// Destroys the various views.
void DestroyViews();
// Invoked when the visibility of the omnibox popup changes.
void PopupVisibilityChanged();
// Hide the overlay, when suggestions are showing and Instant is enabled.
void MaybeHideOverlay();
// Access active search model.
chrome::search::SearchModel* search_model();
// Access active web contents.
content::WebContents* web_contents();
// The profile. Weak.
content::BrowserContext* browser_context_;
// Where the overlay is placed. Weak.
ContentsContainer* contents_container_;
// Weak.
chrome::search::ToolbarSearchAnimator* toolbar_search_animator_;
// The browser's toolbar view. Weak.
ToolbarView* toolbar_view_;
// Weak.
LocationBarContainer* location_bar_container_;
State state_;
// The active TabContents. Weak. May be NULL.
TabContents* tab_contents_;
// The following views are created to render the NTP. Visually they look
// something like:
//
// |---SearchContainerView------------------------------|
// ||-----NTPView & OmniboxPopupViewParent-------------||
// || ||
// || |--Logo or Name------------------------| ||
// || | | ||
// || | | ||
// || |--------------------------------------| ||
// || ||
// || * ||
// || ||
// || |--ContentView-------------------------| ||
// || | | ||
// || | | ||
// || |--------------------------------------| ||
// || ||
// ||--------------------------------------------------||
// |----------------------------------------------------|
//
// * - the LocationBarContainer gets positioned here, but it is not a child
// of any of these views.
//
// NTPView and OmniboxPopupViewParent are siblings. When on the NTP the
// OmniboxPopupViewParent is obscured by the NTPView. When on a search page
// the NTPView is hidden.
// The outermost view. Set as the overlay within |contents_container_| passed
// in from owning |BrowserView|.
views::View* search_container_;
// A container view for the NTP component views.
views::View* ntp_container_;
// The default provider's logo, may be NULL. When NULL,
// |default_provider_name_| is used.
// Lifetime is managed by this controller, not the parent |ntp_container_|.
scoped_ptr<views::ImageView> default_provider_logo_;
// The default provider's name. Used as a fallback if the logo is NULL.
// Lifetime is managed by this controller, not the parent |ntp_container_|.
scoped_ptr<views::Label> default_provider_name_;
// An alias to |contents_container_->active()|, but reparented within
// |ntp_view_| when in the NTP state.
views::WebView* content_view_;
// Container provided to clients to host the omnibox popup view.
internal::OmniboxPopupContainer* omnibox_popup_parent_;
DISALLOW_COPY_AND_ASSIGN(SearchViewController);
};
#endif // CHROME_BROWSER_UI_VIEWS_SEARCH_VIEW_CONTROLLER_H_
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