[ios] Adds a LocationBarController interface.

ios/chrome/browser/ui/omnibox/location_bar_view_ios.h

-// 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 IOS_CHROME_BROWSER_UI_OMNIBOX_LOCATION_BAR_VIEW_IOS_H_
-#define IOS_CHROME_BROWSER_UI_OMNIBOX_LOCATION_BAR_VIEW_IOS_H_
-
-#import <UIKit/UIKit.h>
-
-#include <memory>
-
-#include "base/mac/scoped_nsobject.h"
-#include "base/strings/utf_string_conversions.h"
-#include "components/omnibox/browser/omnibox_view.h"
-#include "ios/chrome/browser/ui/omnibox/web_omnibox_edit_controller.h"
-#include "ui/base/page_transition_types.h"
-#include "url/gurl.h"
-
-namespace ios {
-class ChromeBrowserState;
-}
-
-namespace web {
-class WebState;
-}
-
-class OmniboxViewIOS;
-@class OmniboxClearButtonBridge;
-@protocol OmniboxPopupPositioner;
-@class OmniboxTextFieldIOS;
-@protocol PreloadProvider;
-class ToolbarModel;
-
-// Delegate for LocationBarViewIOS objects.  Used to provide the location bar a
-// way to open URLs and otherwise interact with the browser.
-@protocol LocationBarDelegate
-- (void)loadGURLFromLocationBar:(const GURL&)url
-                     transition:(ui::PageTransition)transition;
-- (void)locationBarHasBecomeFirstResponder;
-- (void)locationBarHasResignedFirstResponder;
-- (void)locationBarBeganEdit;
-- (void)locationBarChanged;
-- (web::WebState*)getWebState;
-- (ToolbarModel*)toolbarModel;
-@end
-
-// C++ object that wraps an OmniboxViewIOS and serves as its
-// OmniboxEditController.  LocationBarViewIOS bridges between the edit view
-// and the rest of the browser and manages text field decorations (location
-// icon, security icon, etc.).
-class LocationBarViewIOS : public WebOmniboxEditController {
- public:
-  LocationBarViewIOS(OmniboxTextFieldIOS* field,
-                     ios::ChromeBrowserState* browser_state,
-                     id<PreloadProvider> preloader,
-                     id<OmniboxPopupPositioner> positioner,
-                     id<LocationBarDelegate> delegate);
-  ~LocationBarViewIOS() override;
-
-  // OmniboxEditController implementation
-  void OnAutocompleteAccept(const GURL& url,
-                            WindowOpenDisposition disposition,
-                            ui::PageTransition transition,
-                            AutocompleteMatchType::Type type) override;
-  void OnChanged() override;
-  void OnInputInProgress(bool in_progress) override;
-  void OnSetFocus() override;
-  ToolbarModel* GetToolbarModel() override;
-  const ToolbarModel* GetToolbarModel() const override;
-
-  // WebOmniboxEditController implementation.
-  web::WebState* GetWebState() override;
-  void OnKillFocus() override;
-
-  // Called when toolbar state is updated.
-  void OnToolbarUpdated();
-
-  // Resign omnibox first responder and end edit view editing.
-  void HideKeyboardAndEndEditing();
-
-  // Tells the omnibox if it can show the hint text or not.
-  void SetShouldShowHintText(bool show_hint_text);
-
-  // Returns a pointer to the text entry view.
-  const OmniboxView* GetLocationEntry() const;
-  OmniboxView* GetLocationEntry();
-
-  // True if the omnibox text field is showing a placeholder image in its left
-  // view while it's collapsed (i.e. not in editing mode).
-  bool IsShowingPlaceholderWhileCollapsed();
-
- private:
-  // Installs a UIButton that serves as the location icon and lock icon.  This
-  // button is installed as a left view of |field_|.
-  void InstallLocationIcon();
-
-  // Creates and installs the voice search UIButton as a right view of |field_|.
-  // Does nothing on tablet.
-  void InstallVoiceSearchIcon();
-
-  // Creates the clear text UIButton to be used as a right view of |field_|.
-  void CreateClearTextIcon(bool is_incognito);
-
-  // Updates the view to show the appropriate button (e.g. clear text or voice
-  // search) on the right side of |field_|.
-  void UpdateRightDecorations();
-
-  bool show_hint_text_;
-  base::scoped_nsobject<UIButton> clear_text_button_;
-  std::unique_ptr<OmniboxViewIOS> edit_view_;
-  base::scoped_nsobject<OmniboxClearButtonBridge> clear_button_bridge_;
-  // |field_| should be __weak but is included from non-ARC code.
-  __unsafe_unretained OmniboxTextFieldIOS* field_;
-  // |delegate_| should be __weak but is included from non-ARC code.
-  __unsafe_unretained id<LocationBarDelegate> delegate_;
-  bool is_showing_placeholder_while_collapsed_;
-};
-
-#endif  // IOS_CHROME_BROWSER_UI_OMNIBOX_LOCATION_BAR_VIEW_IOS_H_