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// Copyright 2014 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 "components/zoom/zoom_event_manager.h"
#include <memory>
#include "components/zoom/zoom_event_manager_observer.h"
#include "content/public/browser/browser_context.h"
namespace {
static const char kBrowserZoomEventManager[] = "browser_zoom_event_manager";
}
namespace zoom {
ZoomEventManager* ZoomEventManager::GetForBrowserContext(
content::BrowserContext* context) {
if (!context->GetUserData(kBrowserZoomEventManager)) {
context->SetUserData(kBrowserZoomEventManager,
std::make_unique<ZoomEventManager>());
}
return static_cast<ZoomEventManager*>(
context->GetUserData(kBrowserZoomEventManager));
}
ZoomEventManager::ZoomEventManager() : weak_ptr_factory_(this) {}
ZoomEventManager::~ZoomEventManager() {}
void ZoomEventManager::OnZoomLevelChanged(
const content::HostZoomMap::ZoomLevelChange& change) {
zoom_level_changed_callbacks_.Notify(change);
}
std::unique_ptr<content::HostZoomMap::Subscription>
ZoomEventManager::AddZoomLevelChangedCallback(
const content::HostZoomMap::ZoomLevelChangedCallback& callback) {
return zoom_level_changed_callbacks_.Add(callback);
}
void ZoomEventManager::OnDefaultZoomLevelChanged() {
for (auto& observer : observers_)
observer.OnDefaultZoomLevelChanged();
}
void ZoomEventManager::AddZoomEventManagerObserver(
ZoomEventManagerObserver* observer) {
observers_.AddObserver(observer);
}
void ZoomEventManager::RemoveZoomEventManagerObserver(
ZoomEventManagerObserver* observer) {
observers_.RemoveObserver(observer);
}
} // namespace zoom
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