#include "cocoawindowcontext_p.h"
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#include <objc/runtime.h>
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#include <AppKit/AppKit.h>
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#include <QtGui/QGuiApplication>
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namespace QWK {
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struct NSWindowProxy {
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NSWindowProxy(NSWindow *macWindow) {
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if (instances.contains(macWindow)) {
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return;
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}
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nswindow = macWindow;
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instances.insert(macWindow, this);
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if (!windowClass) {
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windowClass = [nswindow class];
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replaceImplementations();
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}
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}
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~NSWindowProxy() {
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instances.remove(nswindow);
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if (instances.count() <= 0) {
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restoreImplementations();
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windowClass = nil;
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}
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nswindow = nil;
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}
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void replaceImplementations() {
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Method method = class_getInstanceMethod(windowClass, @selector(setStyleMask:));
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oldSetStyleMask = reinterpret_cast<setStyleMaskPtr>(
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method_setImplementation(method, reinterpret_cast<IMP>(setStyleMask)));
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method =
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class_getInstanceMethod(windowClass, @selector(setTitlebarAppearsTransparent:));
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oldSetTitlebarAppearsTransparent =
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reinterpret_cast<setTitlebarAppearsTransparentPtr>(method_setImplementation(
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method, reinterpret_cast<IMP>(setTitlebarAppearsTransparent)));
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#if 0
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method = class_getInstanceMethod(windowClass, @selector(canBecomeKeyWindow));
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oldCanBecomeKeyWindow = reinterpret_cast<canBecomeKeyWindowPtr>(method_setImplementation(method, reinterpret_cast<IMP>(canBecomeKeyWindow)));
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method = class_getInstanceMethod(windowClass, @selector(canBecomeMainWindow));
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oldCanBecomeMainWindow = reinterpret_cast<canBecomeMainWindowPtr>(method_setImplementation(method, reinterpret_cast<IMP>(canBecomeMainWindow)));
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#endif
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method = class_getInstanceMethod(windowClass, @selector(sendEvent:));
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oldSendEvent = reinterpret_cast<sendEventPtr>(
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method_setImplementation(method, reinterpret_cast<IMP>(sendEvent)));
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}
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void restoreImplementations() {
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Method method = class_getInstanceMethod(windowClass, @selector(setStyleMask:));
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method_setImplementation(method, reinterpret_cast<IMP>(oldSetStyleMask));
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oldSetStyleMask = nil;
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method =
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class_getInstanceMethod(windowClass, @selector(setTitlebarAppearsTransparent:));
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method_setImplementation(method,
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reinterpret_cast<IMP>(oldSetTitlebarAppearsTransparent));
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oldSetTitlebarAppearsTransparent = nil;
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#if 0
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method = class_getInstanceMethod(windowClass, @selector(canBecomeKeyWindow));
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method_setImplementation(method, reinterpret_cast<IMP>(oldCanBecomeKeyWindow));
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oldCanBecomeKeyWindow = nil;
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method = class_getInstanceMethod(windowClass, @selector(canBecomeMainWindow));
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method_setImplementation(method, reinterpret_cast<IMP>(oldCanBecomeMainWindow));
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oldCanBecomeMainWindow = nil;
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#endif
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method = class_getInstanceMethod(windowClass, @selector(sendEvent:));
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method_setImplementation(method, reinterpret_cast<IMP>(oldSendEvent));
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oldSendEvent = nil;
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}
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void setSystemTitleBarVisible(const bool visible) {
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NSView *nsview = [nswindow contentView];
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if (!nsview) {
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return;
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}
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nsview.wantsLayer = YES;
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nswindow.styleMask |= NSWindowStyleMaskResizable;
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if (visible) {
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nswindow.styleMask &= ~NSWindowStyleMaskFullSizeContentView;
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} else {
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nswindow.styleMask |= NSWindowStyleMaskFullSizeContentView;
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}
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nswindow.titlebarAppearsTransparent = (visible ? NO : YES);
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nswindow.titleVisibility = (visible ? NSWindowTitleVisible : NSWindowTitleHidden);
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nswindow.hasShadow = YES;
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nswindow.showsToolbarButton = NO;
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nswindow.movableByWindowBackground = NO;
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nswindow.movable = NO; // This line causes the window in the wrong position when
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// become fullscreen.
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// For some unknown reason, we don't need the following hack in Qt versions below or
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// equal to 6.2.4.
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#if (QT_VERSION > QT_VERSION_CHECK(6, 2, 4))
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[nswindow standardWindowButton:NSWindowCloseButton].hidden = (visible ? NO : YES);
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[nswindow standardWindowButton:NSWindowMiniaturizeButton].hidden = (visible ? NO : YES);
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[nswindow standardWindowButton:NSWindowZoomButton].hidden = (visible ? NO : YES);
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#endif
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}
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private:
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static BOOL canBecomeKeyWindow(id obj, SEL sel) {
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if (instances.contains(reinterpret_cast<NSWindow *>(obj))) {
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return YES;
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}
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if (oldCanBecomeKeyWindow) {
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return oldCanBecomeKeyWindow(obj, sel);
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}
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return YES;
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}
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static BOOL canBecomeMainWindow(id obj, SEL sel) {
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if (instances.contains(reinterpret_cast<NSWindow *>(obj))) {
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return YES;
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}
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if (oldCanBecomeMainWindow) {
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return oldCanBecomeMainWindow(obj, sel);
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}
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return YES;
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}
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static void setStyleMask(id obj, SEL sel, NSWindowStyleMask styleMask) {
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if (instances.contains(reinterpret_cast<NSWindow *>(obj))) {
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styleMask |= NSWindowStyleMaskFullSizeContentView;
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}
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if (oldSetStyleMask) {
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oldSetStyleMask(obj, sel, styleMask);
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}
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}
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static void setTitlebarAppearsTransparent(id obj, SEL sel, BOOL transparent) {
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if (instances.contains(reinterpret_cast<NSWindow *>(obj))) {
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transparent = YES;
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}
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if (oldSetTitlebarAppearsTransparent) {
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oldSetTitlebarAppearsTransparent(obj, sel, transparent);
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}
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}
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static void sendEvent(id obj, SEL sel, NSEvent *event) {
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if (oldSendEvent) {
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oldSendEvent(obj, sel, event);
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}
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#if 0
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const auto nswindow = reinterpret_cast<NSWindow *>(obj);
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const auto it = instances.find(nswindow);
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if (it == instances.end()) {
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return;
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}
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NSWindowProxy *proxy = it.value();
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if (event.type == NSEventTypeLeftMouseDown) {
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proxy->lastMouseDownEvent = event;
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QCoreApplication::processEvents();
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proxy->lastMouseDownEvent = nil;
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}
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#endif
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}
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private:
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Q_DISABLE_COPY(NSWindowProxy)
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NSWindow *nswindow = nil;
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// NSEvent *lastMouseDownEvent = nil;
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static inline QHash<NSWindow *, NSWindowProxy *> instances = {};
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static inline Class windowClass = nil;
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using setStyleMaskPtr = void (*)(id, SEL, NSWindowStyleMask);
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static inline setStyleMaskPtr oldSetStyleMask = nil;
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using setTitlebarAppearsTransparentPtr = void (*)(id, SEL, BOOL);
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static inline setTitlebarAppearsTransparentPtr oldSetTitlebarAppearsTransparent = nil;
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using canBecomeKeyWindowPtr = BOOL (*)(id, SEL);
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static inline canBecomeKeyWindowPtr oldCanBecomeKeyWindow = nil;
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using canBecomeMainWindowPtr = BOOL (*)(id, SEL);
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static inline canBecomeMainWindowPtr oldCanBecomeMainWindow = nil;
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using sendEventPtr = void (*)(id, SEL, NSEvent *);
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static inline sendEventPtr oldSendEvent = nil;
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};
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using ProxyList = QHash<WId, NSWindowProxy *>;
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Q_GLOBAL_STATIC(ProxyList, g_proxyList);
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static inline NSWindow *mac_getNSWindow(const WId windowId) {
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const auto nsview = reinterpret_cast<NSView *>(windowId);
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return [nsview window];
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}
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static inline void cleanupProxy() {
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if (g_proxyList()->isEmpty()) {
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return;
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}
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const auto &data = *g_proxyList();
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qDeleteAll(data);
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g_proxyList()->clear();
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}
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static inline NSWindowProxy *ensureWindowProxy(const WId windowId) {
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auto it = g_proxyList()->find(windowId);
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if (it == g_proxyList()->end()) {
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NSWindow *nswindow = mac_getNSWindow(windowId);
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const auto proxy = new NSWindowProxy(nswindow);
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it = g_proxyList()->insert(windowId, proxy);
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}
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static bool cleanerInstalled = false;
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if (!cleanerInstalled) {
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cleanerInstalled = true;
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qAddPostRoutine(cleanupProxy);
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}
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return it.value();
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}
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class CocoaWindowEventFilter : public QObject {
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public:
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explicit CocoaWindowEventFilter(AbstractWindowContext *context, QObject *parent = nullptr);
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~CocoaWindowEventFilter() override;
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enum WindowStatus {
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Idle,
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WaitingRelease,
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PreparingMove,
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Moving,
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};
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protected:
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bool eventFilter(QObject *object, QEvent *event) override;
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private:
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AbstractWindowContext *m_context;
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bool m_cursorShapeChanged;
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WindowStatus m_windowStatus;
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};
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CocoaWindowEventFilter::CocoaWindowEventFilter(AbstractWindowContext *context, QObject *parent)
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: QObject(parent), m_context(context), m_cursorShapeChanged(false), m_windowStatus(Idle) {
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m_context->window()->installEventFilter(this);
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}
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CocoaWindowEventFilter::~CocoaWindowEventFilter() = default;
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bool CocoaWindowEventFilter::eventFilter(QObject *object, QEvent *event) {
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auto type = event->type();
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if (type < QEvent::MouseButtonPress || type > QEvent::MouseMove) {
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return false;
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}
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QObject *host = m_context->host();
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QWindow *window = m_context->window();
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WindowItemDelegate *delegate = m_context->delegate();
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auto me = static_cast<const QMouseEvent *>(event);
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#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
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QPoint scenePos = me->scenePosition().toPoint();
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QPoint globalPos = me->globalPosition().toPoint();
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#else
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QPoint scenePos = me->windowPos().toPoint();
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QPoint globalPos = me->screenPos().toPoint();
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#endif
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bool inTitleBar = m_context->isInTitleBarDraggableArea(scenePos);
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switch (type) {
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case QEvent::MouseButtonPress: {
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switch (me->button()) {
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case Qt::LeftButton: {
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if (inTitleBar) {
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// If we call startSystemMove() now but release the mouse without actual
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// movement, there will be no MouseReleaseEvent, so we defer it when the
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// mouse is actually moving for the first time
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m_windowStatus = PreparingMove;
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event->accept();
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return true;
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}
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m_windowStatus = WaitingRelease;
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break;
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}
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case Qt::RightButton: {
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m_context->showSystemMenu(globalPos);
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break;
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}
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default:
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break;
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}
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break;
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}
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case QEvent::MouseButtonRelease: {
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switch (m_windowStatus) {
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case PreparingMove:
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case Moving: {
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m_windowStatus = Idle;
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event->accept();
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return true;
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}
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case WaitingRelease: {
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m_windowStatus = Idle;
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break;
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}
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default: {
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if (inTitleBar) {
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event->accept();
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return true;
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}
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break;
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}
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}
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break;
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}
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case QEvent::MouseMove: {
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switch (m_windowStatus) {
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case Moving: {
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return true;
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}
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case PreparingMove: {
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m_windowStatus = Moving;
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window->startSystemMove();
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event->accept();
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return true;
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}
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default:
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break;
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}
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break;
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}
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case QEvent::MouseButtonDblClick: {
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if (me->button() == Qt::LeftButton && inTitleBar &&
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!delegate->isHostSizeFixed(host)) {
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Qt::WindowStates windowState = delegate->getWindowState(host);
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if (!(windowState & Qt::WindowFullScreen)) {
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if (windowState & Qt::WindowMaximized) {
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delegate->setWindowState(host, windowState & ~Qt::WindowMaximized);
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} else {
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delegate->setWindowState(host, windowState | Qt::WindowMaximized);
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}
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event->accept();
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return true;
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}
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}
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break;
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}
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default:
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break;
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}
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return false;
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}
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CocoaWindowContext::CocoaWindowContext() : AbstractWindowContext() {
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}
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CocoaWindowContext::~CocoaWindowContext() {
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// TODO: deref something?
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}
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QString CocoaWindowContext::key() const {
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return QStringLiteral("cocoa");
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}
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void CocoaWindowContext::virtual_hook(int id, void *data) {
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switch (id) {
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case ShowSystemMenuHook:
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// TODO: mac system menu
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return;
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case SystemButtonAreaChangedHook:
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// TODO: mac system button rect updated
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return;
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default:
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break;
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}
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AbstractWindowContext::virtual_hook(id, data);
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}
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bool CocoaWindowContext::setupHost() {
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windowId = m_windowHandle->winId();
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ensureWindowProxy(windowId)->setSystemTitleBarVisible(false);
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std::ignore = new CocoaWindowEventFilter(this, this);
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return true;
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}
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}
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