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// Copyright 2025 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/webui_browser/webui_browser_window.h"
#import <AppKit/AppKit.h>
#include "build/build_config.h"
#include "chrome/app/chrome_command_ids.h"
#include "chrome/browser/apps/app_shim/app_shim_host_mac.h"
#include "chrome/browser/apps/app_shim/app_shim_manager_mac.h"
#include "chrome/browser/ui/browser_command_controller.h"
#include "chrome/browser/ui/browser_commands.h"
#import "chrome/browser/ui/cocoa/browser_window_command_handler.h"
#import "chrome/browser/ui/cocoa/chrome_command_dispatcher_delegate.h"
#include "components/input/native_web_keyboard_event.h"
#import "components/remote_cocoa/app_shim/native_widget_ns_window_bridge.h"
#include "ui/base/accelerators/global_accelerator_listener/global_accelerator_listener.h"
#include "ui/views/cocoa/native_widget_mac_ns_window_host.h"
#include "ui/views/widget/native_widget_mac.h"
#if !BUILDFLAG(IS_MAC)
#error "This file is macOS-only and should not be included on other platforms."
#endif
namespace {
AppShimHost* GetHostForBrowser(Browser* browser) {
auto* const shim_manager = apps::AppShimManager::Get();
if (!shim_manager) {
return nullptr;
}
return shim_manager->GetHostForRemoteCocoaBrowser(browser);
}
bool ShouldHandleKeyboardEvent(const input::NativeWebKeyboardEvent& event) {
// |event.skip_if_unhandled| is true when it shouldn't be handled by the
// browser if it was ignored by the renderer. See http://crbug.com/25000.
if (event.skip_if_unhandled) {
return false;
}
// Ignore synthesized keyboard events. See http://crbug.com/23221.
if (event.GetType() == input::NativeWebKeyboardEvent::Type::kChar) {
return false;
}
// Do not fire shortcuts on key up, and only forward shortcuts if we have an
// underlying os event.
return event.os_event && event.os_event.Get().type == NSEventTypeKeyDown;
}
} // namespace
bool WebUIBrowserWindow::HandleKeyboardEvent(
const input::NativeWebKeyboardEvent& event) {
if (!ShouldHandleKeyboardEvent(event)) {
return false;
}
// On Mac keyboard shortcuts are caught by the menu entries, so the keyboard
// shortcut events must be redispatched to the system so properly configured
// menu items can catch the keyboard shortcuts.
return views::NativeWidgetMacNSWindowHost::GetFromNativeWindow(
GetNativeWindow())
->RedispatchKeyEvent(event.os_event.Get());
}
// Note that the logic here is often derived from BrowserFrameMac.
class WebUIBrowserNativeWidgetMac : public views::NativeWidgetMac {
public:
WebUIBrowserNativeWidgetMac(Browser* browser, views::Widget* widget)
: NativeWidgetMac(widget), browser_(browser) {}
private:
// views::NativeWidgetMac implementation:
void ValidateUserInterfaceItem(
int32_t command,
remote_cocoa::mojom::ValidateUserInterfaceItemResult* result) override {
// This allows menu items like "Close Tabs" to be enabled when the browser
// has open tabs, which in turn enables the "Close Tabs" keyboard shortcut.
result->enable = chrome::IsCommandEnabled(browser_, command);
}
// For our ValidateUserInterfaceItem() to be called we must register the
// CommandDispatcher.
void OnWindowInitialized() override {
if (auto* bridge = GetInProcessNSWindowBridge()) {
bridge->SetCommandDispatcher(
[[ChromeCommandDispatcherDelegate alloc] init],
[[BrowserWindowCommandHandler alloc] init]);
} else {
if (auto* host = GetHostForBrowser(browser_)) {
host->GetAppShim()->CreateCommandDispatcherForWidget(
GetNSWindowHost()->bridged_native_widget_id());
}
}
}
bool WillExecuteCommand(int32_t command,
WindowOpenDisposition window_open_disposition,
bool is_before_first_responder) override {
if (is_before_first_responder) {
// The specification for this private extensions API is incredibly vague.
// For now, we avoid triggering chrome commands prior to giving the
// firstResponder a chance to handle the event.
if (ui::GlobalAcceleratorListener::GetInstance() &&
ui::GlobalAcceleratorListener::GetInstance()
->IsShortcutHandlingSuspended()) {
return false;
}
// If a command is reserved, then we also have it bypass the main menu.
// This is based on the rough approximation that reserved commands are
// also the ones that we want to be quickly repeatable.
// https://crbug.com/836947.
// The function IsReservedCommandOrKey does not examine its event argument
// on macOS.
input::NativeWebKeyboardEvent dummy_event(
blink::WebInputEvent::Type::kKeyDown, 0, base::TimeTicks());
if (!browser_->command_controller()->IsReservedCommandOrKey(
command, dummy_event)) {
return false;
}
}
return true;
}
bool ExecuteCommand(int32_t command,
WindowOpenDisposition window_open_disposition,
bool is_before_first_responder) override {
if (!WillExecuteCommand(command, window_open_disposition,
is_before_first_responder)) {
return false;
}
// Actually Execute the specific command with |browser_|.
// This facilitates commands initiated from keyboard shortcuts.
chrome::ExecuteCommandWithDisposition(browser_, command,
window_open_disposition);
return true;
}
// views::NativeWidget implementation:
views::internal::NativeWidgetPrivate* AsNativeWidgetPrivate() override {
return this;
}
raw_ptr<Browser> browser_;
};
views::NativeWidget* WebUIBrowserWindow::CreateNativeWidget() {
return new WebUIBrowserNativeWidgetMac(browser_.get(), widget_.get());
}
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