15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/basictypes.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/compiler_specific.h" 102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/prefs/pref_member.h" 112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "content/public/browser/host_zoom_map.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/public/browser/web_contents_observer.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/public/browser/web_contents_user_data.h" 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class ZoomObserver; 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace content { 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class WebContents; 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Per-tab class to manage the Omnibox zoom icon. 222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)class ZoomController : public content::WebContentsObserver, 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public content::WebContentsUserData<ZoomController> { 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual ~ZoomController(); 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int zoom_percent() const { return zoom_percent_; } 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Convenience method to quickly check if the tab's at default zoom. 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool IsAtDefaultZoom() const; 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Returns which image should be loaded for the current zoom level. 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int GetResourceForZoomLevel() const; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void set_observer(ZoomObserver* observer) { observer_ = observer; } 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // content::WebContentsObserver overrides: 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void DidNavigateMainFrame( 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const content::LoadCommittedDetails& details, 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const content::FrameNavigateParams& params) OVERRIDE; 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) private: 432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) explicit ZoomController(content::WebContents* web_contents); 442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) friend class content::WebContentsUserData<ZoomController>; 452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) friend class ZoomControllerTest; 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) void OnZoomLevelChanged(const content::HostZoomMap::ZoomLevelChange& change); 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Updates the zoom icon and zoom percentage based on current values and 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // notifies the observer if changes have occurred. |host| may be empty, 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // meaning the change should apply to ~all sites. If it is not empty, the 527dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch // change only affects sites with the given host. 537dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch void UpdateState(const std::string& host); 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The current zoom percentage. 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int zoom_percent_; 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Used to access the default zoom level preference. 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DoublePrefMember default_zoom_level_; 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Observer receiving notifications on state changes. 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ZoomObserver* observer_; 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) content::BrowserContext* browser_context_; 652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) content::HostZoomMap::ZoomLevelChangedCallback zoom_callback_; 672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(ZoomController); 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_ 72