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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/tabs/organization/trigger_observer.h"
#include "base/functional/bind.h"
#include "base/location.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/tabs/organization/trigger.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_thread.h"
TabOrganizationTriggerObserver::TabOrganizationTriggerObserver(
base::RepeatingCallback<void(const Browser*)> on_trigger,
content::BrowserContext* browser_context,
std::unique_ptr<TabOrganizationTrigger> trigger_logic)
: trigger_logic_(std::move(trigger_logic)),
on_trigger_(on_trigger),
browser_context_(browser_context) {
for (Browser* browser : *BrowserList::GetInstance()) {
OnBrowserAdded(browser);
}
BrowserList::GetInstance()->AddObserver(this);
}
TabOrganizationTriggerObserver::~TabOrganizationTriggerObserver() {
BrowserList::GetInstance()->RemoveObserver(this);
// TabStripModelObserver destructor will stop observing the TabStripModels.
}
void TabOrganizationTriggerObserver::OnBrowserAdded(Browser* browser) {
if (browser_context_ != browser->profile()) {
return;
}
tab_strip_model_to_browser_map_.emplace(browser->tab_strip_model(), browser);
browser->tab_strip_model()->AddObserver(this);
}
void TabOrganizationTriggerObserver::OnBrowserRemoved(Browser* browser) {
if (browser_context_ != browser->profile()) {
return;
}
tab_strip_model_to_browser_map_.erase(browser->tab_strip_model());
browser->tab_strip_model()->RemoveObserver(this);
}
void TabOrganizationTriggerObserver::OnTabStripModelChanged(
TabStripModel* tab_strip_model,
const TabStripModelChange& change,
const TabStripSelectionChange& selection) {
// Debounce TabStripModelObserver notifications - some batch tabstrip changes
// can send out many separate notifications.
if (!pending_eval_) {
pending_eval_ = true;
content::GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(&TabOrganizationTriggerObserver::EvaluateTrigger,
weak_ptr_factory_.GetWeakPtr(),
BrowserForTabStripModel(tab_strip_model)->AsWeakPtr()));
}
}
Browser* TabOrganizationTriggerObserver::BrowserForTabStripModel(
TabStripModel* tab_strip_model) const {
return tab_strip_model_to_browser_map_.at(tab_strip_model).get();
}
void TabOrganizationTriggerObserver::EvaluateTrigger(
base::WeakPtr<Browser> browser) {
if (!browser) {
return;
}
if (trigger_logic_->ShouldTrigger(browser->tab_strip_model())) {
on_trigger_.Run(BrowserForTabStripModel(browser->tab_strip_model()));
}
pending_eval_ = false;
}
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