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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/views/autofill/popup/custom_cursor_suppressor.h"
#include <map>
#include <memory>
#include <utility>
#include <vector>
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/global_routing_id.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_widget_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_observer.h"
#include "extensions/browser/extension_host.h"
#include "extensions/browser/extension_host_registry.h"
CustomCursorSuppressor::NavigationObserver::NavigationObserver(
content::WebContents* web_contents,
Callback callback)
: content::WebContentsObserver(web_contents),
callback_(std::move(callback)) {
CHECK(callback_);
}
CustomCursorSuppressor::NavigationObserver::~NavigationObserver() = default;
void CustomCursorSuppressor::NavigationObserver::RenderFrameHostChanged(
content::RenderFrameHost* old_host,
content::RenderFrameHost* new_host) {
if (new_host && new_host->IsInPrimaryMainFrame()) {
callback_.Run(*web_contents());
}
}
CustomCursorSuppressor::CustomCursorSuppressor() = default;
CustomCursorSuppressor::~CustomCursorSuppressor() = default;
void CustomCursorSuppressor::Start(int max_dimension_dips) {
max_dimension_dips_ = max_dimension_dips;
// Observe the list of browsers.
browser_list_observation_.Observe(BrowserList::GetInstance());
// Observe all TabStripModels of existing browsers and suppress custom cursors
// on their active tabs.
for (Browser* browser : *BrowserList::GetInstance()) {
browser->tab_strip_model()->AddObserver(this);
if (content::WebContents* active_contents =
browser->tab_strip_model()->GetActiveWebContents()) {
MaybeObserveNavigationsInWebContents(*active_contents);
SuppressForWebContents(*active_contents);
}
ObserveAndSuppressExtensionsForProfile(*browser->profile());
}
}
void CustomCursorSuppressor::Stop() {
disallow_custom_cursor_scopes_.clear();
TabStripModelObserver::StopObservingAll(this);
browser_list_observation_.Reset();
extension_host_registry_observation_.RemoveAllObservations();
}
bool CustomCursorSuppressor::IsSuppressing(
content::WebContents& web_contents) const {
return disallow_custom_cursor_scopes_.contains(
web_contents.GetPrimaryMainFrame()->GetGlobalId());
}
std::vector<content::GlobalRenderFrameHostId>
CustomCursorSuppressor::SuppressedRenderFrameHostIdsForTesting() const {
std::vector<content::GlobalRenderFrameHostId> rfh_ids;
for (const auto& [rfh_id, scope] : disallow_custom_cursor_scopes_) {
rfh_ids.push_back(rfh_id);
}
return rfh_ids;
}
void CustomCursorSuppressor::ObserveAndSuppressExtensionsForProfile(
Profile& profile) {
auto* const registry = extensions::ExtensionHostRegistry::Get(&profile);
if (!registry ||
extension_host_registry_observation_.IsObservingSource(registry)) {
return;
}
extension_host_registry_observation_.AddObservation(registry);
// Suppress custom cursors on all existing extension hosts.
for (extensions::ExtensionHost* host : registry->extension_hosts()) {
if (host->document_element_available()) {
MaybeObserveNavigationsInWebContents(*host->host_contents());
SuppressForWebContents(*host->host_contents());
}
}
}
void CustomCursorSuppressor::SuppressForWebContents(
content::WebContents& web_contents) {
if (IsSuppressing(web_contents)) {
return;
}
disallow_custom_cursor_scopes_.insert(
{web_contents.GetPrimaryMainFrame()->GetGlobalId(),
web_contents.CreateDisallowCustomCursorScope(max_dimension_dips_)});
}
void CustomCursorSuppressor::MaybeObserveNavigationsInWebContents(
content::WebContents& web_contents) {
if (IsSuppressing(web_contents)) {
return;
}
navigation_observers_.push_back(std::make_unique<NavigationObserver>(
&web_contents,
base::BindRepeating(&CustomCursorSuppressor::SuppressForWebContents,
base::Unretained(this))));
}
void CustomCursorSuppressor::OnBrowserAdded(Browser* browser) {
browser->tab_strip_model()->AddObserver(this);
ObserveAndSuppressExtensionsForProfile(*browser->profile());
}
void CustomCursorSuppressor::OnExtensionHostRegistryShutdown(
extensions::ExtensionHostRegistry* registry) {
CHECK(extension_host_registry_observation_.IsObservingSource(registry));
extension_host_registry_observation_.RemoveObservation(registry);
}
void CustomCursorSuppressor::OnTabStripModelChanged(
TabStripModel* tab_strip_model,
const TabStripModelChange& change,
const TabStripSelectionChange& selection) {
if (selection.active_tab_changed() && selection.new_contents) {
MaybeObserveNavigationsInWebContents(*selection.new_contents);
SuppressForWebContents(*selection.new_contents);
}
}
void CustomCursorSuppressor::OnExtensionHostDocumentElementAvailable(
content::BrowserContext* browser_context,
extensions::ExtensionHost* extension_host) {
CHECK(extension_host);
CHECK(extension_host->host_contents());
SuppressForWebContents(*extension_host->host_contents());
}
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