| // 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. |
| |
| #include "chrome/browser/ui/zoom/zoom_controller.h" |
| |
| #include "base/prefs/pref_service.h" |
| #include "chrome/browser/chrome_notification_types.h" |
| #include "chrome/browser/profiles/profile.h" |
| #include "chrome/browser/ui/browser_finder.h" |
| #include "chrome/common/pref_names.h" |
| #include "content/public/browser/host_zoom_map.h" |
| #include "content/public/browser/navigation_entry.h" |
| #include "content/public/browser/notification_details.h" |
| #include "content/public/browser/notification_service.h" |
| #include "content/public/browser/notification_types.h" |
| #include "content/public/browser/web_contents.h" |
| #include "content/public/common/page_zoom.h" |
| #include "grit/theme_resources.h" |
| #include "net/base/net_util.h" |
| |
| DEFINE_WEB_CONTENTS_USER_DATA_KEY(ZoomController); |
| |
| ZoomController::ZoomController(content::WebContents* web_contents) |
| : content::WebContentsObserver(web_contents), |
| zoom_percent_(100), |
| observer_(NULL), |
| browser_context_(web_contents->GetBrowserContext()) { |
| Profile* profile = |
| Profile::FromBrowserContext(web_contents->GetBrowserContext()); |
| default_zoom_level_.Init(prefs::kDefaultZoomLevel, profile->GetPrefs(), |
| base::Bind(&ZoomController::UpdateState, |
| base::Unretained(this), |
| std::string())); |
| |
| zoom_subscription_ = content::HostZoomMap::GetForBrowserContext( |
| browser_context_)->AddZoomLevelChangedCallback( |
| base::Bind(&ZoomController::OnZoomLevelChanged, |
| base::Unretained(this))); |
| |
| UpdateState(std::string()); |
| } |
| |
| ZoomController::~ZoomController() {} |
| |
| bool ZoomController::IsAtDefaultZoom() const { |
| return content::ZoomValuesEqual( |
| content::HostZoomMap::GetZoomLevel(web_contents()), |
| default_zoom_level_.GetValue()); |
| } |
| |
| int ZoomController::GetResourceForZoomLevel() const { |
| if (IsAtDefaultZoom()) |
| return IDR_ZOOM_NORMAL; |
| double zoom = content::HostZoomMap::GetZoomLevel(web_contents()); |
| return zoom > default_zoom_level_.GetValue() ? IDR_ZOOM_PLUS : IDR_ZOOM_MINUS; |
| } |
| |
| void ZoomController::DidNavigateMainFrame( |
| const content::LoadCommittedDetails& details, |
| const content::FrameNavigateParams& params) { |
| // If the main frame's content has changed, the new page may have a different |
| // zoom level from the old one. |
| UpdateState(std::string()); |
| } |
| |
| void ZoomController::OnZoomLevelChanged( |
| const content::HostZoomMap::ZoomLevelChange& change) { |
| UpdateState(change.host); |
| } |
| |
| void ZoomController::UpdateState(const std::string& host) { |
| // If |host| is empty, all observers should be updated. |
| if (!host.empty()) { |
| // Use the navigation entry's URL instead of the WebContents' so virtual |
| // URLs work (e.g. chrome://settings). http://crbug.com/153950 |
| content::NavigationEntry* entry = |
| web_contents()->GetController().GetLastCommittedEntry(); |
| if (!entry || |
| host != net::GetHostOrSpecFromURL(entry->GetURL())) { |
| return; |
| } |
| } |
| |
| bool dummy; |
| zoom_percent_ = web_contents()->GetZoomPercent(&dummy, &dummy); |
| |
| if (observer_) |
| observer_->OnZoomChanged(web_contents(), !host.empty()); |
| } |