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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
// This file is included from qnsview.mm, and only used to organize the code
#include "qcocoaapplicationdelegate.h"
#include "qcocoansmenu.h"
#include "qcocoamenuitem.h"
#include "qcocoamenu.h"
#include "qcocoamenubar.h"
@implementation QNSView (Menus)
// Qt does not (yet) have a mechanism for propagating generic actions,
// so we can only support actions that originate from a QCocoaNSMenuItem,
// where we can forward the action by emitting QPlatformMenuItem::activated().
// But waiting for forwardInvocation to check that the sender is a
// QCocoaNSMenuItem is too late, as AppKit has at that point chosen
// our view as the target for the action, and if we can't handle it
// the action will not propagate up the responder chain as it should.
// Instead, we hook in early in the process of determining the target
// via the supplementalTargetForAction API, and if we can support the
// action we forward it to a helper. The helper must be tied to the
// view, as the menu validation logic depends on the view's state.
- (id)supplementalTargetForAction:(SEL)action sender:(id)sender
{
qCDebug(lcQpaMenus) << "Resolving action target for" << action << "from" << sender << "via" << self;
if (qt_objc_cast<QCocoaNSMenuItem *>(sender)) {
// The supplemental target must support the selector, but we
// determine so dynamically, so check here before continuing.
if ([self.menuHelper respondsToSelector:action])
return self.menuHelper;
} else {
qCDebug(lcQpaMenus) << "Ignoring action for menu item we didn't create";
}
return [super supplementalTargetForAction:action sender:sender];
}
@end
@interface QNSViewMenuHelper ()
@property (assign) QNSView* view;
@end
@implementation QNSViewMenuHelper
- (instancetype)initWithView:(QNSView *)theView
{
if ((self = [super init]))
self.view = theView;
return self;
}
- (BOOL)validateMenuItem:(NSMenuItem*)item
{
qCDebug(lcQpaMenus) << "Validating" << item << "for" << self.view;
auto *nativeItem = qt_objc_cast<QCocoaNSMenuItem *>(item);
if (!nativeItem)
return item.enabled; // FIXME Test with with Qt as plugin or embedded QWindow.
auto *platformItem = nativeItem.platformMenuItem;
if (!platformItem)
return NO;
// Menu-holding items are always enabled, as it's conventional in Cocoa
if (platformItem->menu())
return YES;
// Check if a modal dialog is active. If so, enable only menu
// items explicitly belonging to this window's own menu bar, or to the window.
if (QGuiApplication::modalWindow() && QGuiApplication::modalWindow()->isActive()) {
QCocoaMenuBar *menubar = nullptr;
QCocoaWindow *menuWindow = nullptr;
QObject *menuParent = platformItem->menuParent();
while (menuParent && !(menubar = qobject_cast<QCocoaMenuBar *>(menuParent))) {
menuWindow = qobject_cast<QCocoaWindow *>(menuParent);
auto *menuObject = dynamic_cast<QCocoaMenuObject *>(menuParent);
menuParent = menuObject ? menuObject->menuParent() : nullptr;
}
if ((!menuWindow || menuWindow->window() != QGuiApplication::modalWindow())
&& (!menubar || menubar->cocoaWindow() != self.view.platformWindow))
return NO;
}
return platformItem->isEnabled();
}
- (BOOL)respondsToSelector:(SEL)selector
{
// See QCocoaMenuItem::resolveTargetAction()
if (selector == @selector(cut:)
|| selector == @selector(copy:)
|| selector == @selector(paste:)
|| selector == @selector(selectAll:)) {
// Not exactly true. Both copy: and selectAll: can work on non key views.
return NSApp.keyWindow == self.view.window
&& self.view.window.firstResponder == self.view;
}
if (selector == @selector(qt_itemFired:))
return YES;
return [super respondsToSelector:selector];
}
- (NSMethodSignature *)methodSignatureForSelector:(SEL)selector
{
// Double check, in case something has cached that we respond
// to the selector, but the result has changed since then.
if (![self respondsToSelector:selector])
return nil;
auto *appDelegate = [QCocoaApplicationDelegate sharedDelegate];
return [appDelegate methodSignatureForSelector:@selector(qt_itemFired:)];
}
- (void)forwardInvocation:(NSInvocation *)invocation
{
NSObject *sender;
[invocation getArgument:&sender atIndex:2];
qCDebug(lcQpaMenus) << "Forwarding" << invocation.selector << "from" << sender;
Q_ASSERT(qt_objc_cast<QCocoaNSMenuItem *>(sender));
invocation.selector = @selector(qt_itemFired:);
[invocation invokeWithTarget:[QCocoaApplicationDelegate sharedDelegate]];
}
@end
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