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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 "chrome/browser/ui/cocoa/handoff_active_url_observer.h"
#include "base/logging.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/cocoa/handoff_active_url_observer_delegate.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "content/public/browser/web_contents.h"
HandoffActiveURLObserver::HandoffActiveURLObserver(
HandoffActiveURLObserverDelegate* delegate)
: delegate_(delegate),
active_tab_strip_model_(nullptr),
active_browser_(nullptr) {
DCHECK(delegate_);
active_browser_ = chrome::FindLastActiveWithHostDesktopType(
chrome::HOST_DESKTOP_TYPE_NATIVE);
BrowserList::AddObserver(this);
UpdateObservations();
}
HandoffActiveURLObserver::~HandoffActiveURLObserver() {
BrowserList::RemoveObserver(this);
StopObservingTabStripModel();
StopObservingWebContents();
}
void HandoffActiveURLObserver::OnBrowserSetLastActive(Browser* browser) {
active_browser_ = browser;
UpdateObservations();
delegate_->HandoffActiveURLChanged(GetActiveWebContents());
}
void HandoffActiveURLObserver::OnBrowserRemoved(Browser* removed_browser) {
if (active_browser_ != removed_browser)
return;
active_browser_ = chrome::FindLastActiveWithHostDesktopType(
chrome::HOST_DESKTOP_TYPE_NATIVE);
UpdateObservations();
delegate_->HandoffActiveURLChanged(GetActiveWebContents());
}
void HandoffActiveURLObserver::ActiveTabChanged(
content::WebContents* old_contents,
content::WebContents* new_contents,
int index,
int reason) {
StartObservingWebContents(new_contents);
delegate_->HandoffActiveURLChanged(new_contents);
}
void HandoffActiveURLObserver::TabStripModelDeleted() {
StopObservingTabStripModel();
StopObservingWebContents();
}
void HandoffActiveURLObserver::DidNavigateMainFrame(
const content::LoadCommittedDetails& details,
const content::FrameNavigateParams& params) {
delegate_->HandoffActiveURLChanged(web_contents());
}
void HandoffActiveURLObserver::WebContentsDestroyed() {
StopObservingWebContents();
}
void HandoffActiveURLObserver::UpdateObservations() {
if (!active_browser_) {
StopObservingTabStripModel();
StopObservingWebContents();
return;
}
TabStripModel* model = active_browser_->tab_strip_model();
StartObservingTabStripModel(model);
content::WebContents* web_contents = model->GetActiveWebContents();
if (web_contents)
StartObservingWebContents(web_contents);
else
StopObservingWebContents();
}
void HandoffActiveURLObserver::StartObservingTabStripModel(
TabStripModel* tab_strip_model) {
DCHECK(tab_strip_model);
if (active_tab_strip_model_ == tab_strip_model)
return;
StopObservingTabStripModel();
tab_strip_model->AddObserver(this);
active_tab_strip_model_ = tab_strip_model;
}
void HandoffActiveURLObserver::StopObservingTabStripModel() {
if (active_tab_strip_model_) {
active_tab_strip_model_->RemoveObserver(this);
active_tab_strip_model_ = nullptr;
}
}
void HandoffActiveURLObserver::StartObservingWebContents(
content::WebContents* web_contents) {
DCHECK(web_contents);
Observe(web_contents);
}
void HandoffActiveURLObserver::StopObservingWebContents() {
Observe(nullptr);
}
content::WebContents* HandoffActiveURLObserver::GetActiveWebContents() {
if (!active_browser_)
return nullptr;
return active_browser_->tab_strip_model()->GetActiveWebContents();
}
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