source: trunk/src/gui/dialogs/qnspanelproxy_mac.mm@ 651

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#include <qdialogbuttonbox.h>
#if defined(Q_WS_MAC)
#include <private/qt_mac_p.h>
#import <AppKit/AppKit.h>
#import <Foundation/Foundation.h>
#import <objc/objc-class.h>

QT_BEGIN_NAMESPACE
static QWidget *currentWindow = 0;
QT_END_NAMESPACE

QT_USE_NAMESPACE

@class QNSPanelProxy;

@interface QNSPanelProxy : NSWindow {
}
- (id)initWithContentRect:(NSRect)contentRect styleMask:(NSUInteger)windowStyle
    backing:(NSBackingStoreType)bufferingType defer:(BOOL)deferCreation;
- (id)initWithContentRect:(NSRect)contentRect styleMask:(NSUInteger)windowStyle
    backing:(NSBackingStoreType)bufferingType defer:(BOOL)deferCreation screen:(NSScreen *)screen;
- (id)qt_fakeInitWithContentRect:(NSRect)contentRect styleMask:(NSUInteger)windowStyle
    backing:(NSBackingStoreType)bufferingType defer:(BOOL)deferCreation;
- (id)qt_fakeInitWithContentRect:(NSRect)contentRect styleMask:(NSUInteger)windowStyle
    backing:(NSBackingStoreType)bufferingType defer:(BOOL)deferCreation screen:(NSScreen *)screen;
@end

@implementation QNSPanelProxy
- (id)initWithContentRect:(NSRect)contentRect styleMask:(NSUInteger)windowStyle
      backing:(NSBackingStoreType)bufferingType defer:(BOOL)deferCreation
{
    // remove evil flag
    windowStyle &= ~NSUtilityWindowMask;
        self = [self qt_fakeInitWithContentRect:contentRect styleMask:windowStyle
                                        backing:bufferingType defer:deferCreation];
    return self;
}

- (id)initWithContentRect:(NSRect)contentRect styleMask:(NSUInteger)windowStyle
      backing:(NSBackingStoreType)bufferingType defer:(BOOL)deferCreation screen:(NSScreen *)screen
{
    // remove evil flag
    windowStyle &= ~NSUtilityWindowMask;
        return [self qt_fakeInitWithContentRect:contentRect styleMask:windowStyle
                                        backing:bufferingType defer:deferCreation screen:screen];
}

- (id)qt_fakeInitWithContentRect:(NSRect)contentRect styleMask:(NSUInteger)windowStyle
    backing:(NSBackingStoreType)bufferingType defer:(BOOL)deferCreation
{
    Q_UNUSED(contentRect);
    Q_UNUSED(windowStyle);
    Q_UNUSED(bufferingType);
    Q_UNUSED(deferCreation);
    return nil;
}

- (id)qt_fakeInitWithContentRect:(NSRect)contentRect styleMask:(NSUInteger)windowStyle
    backing:(NSBackingStoreType)bufferingType defer:(BOOL)deferCreation screen:(NSScreen *)screen
{
    Q_UNUSED(contentRect);
    Q_UNUSED(windowStyle);
    Q_UNUSED(bufferingType);
    Q_UNUSED(deferCreation);
    Q_UNUSED(screen);
    return nil;
}
@end

@class QNSWindowProxy;

@interface QNSWindowProxy : NSWindow {
}
- (void)setTitle:(NSString *)title;
- (void)qt_fakeSetTitle:(NSString *)title;
@end

@implementation QNSWindowProxy
- (void)setTitle:(NSString *)title
{
    QCFString cftitle(currentWindow->windowTitle());

    // evil reverse engineering
    if ([title isEqualToString:@"Print"]
            || [title isEqualToString:@"Page Setup"]
            || [[self className] isEqualToString:@"PMPrintingWindow"])
        title = (NSString *)(static_cast<CFStringRef>(cftitle));
    return [self qt_fakeSetTitle:title];
}

- (void)qt_fakeSetTitle:(NSString *)title
{
    Q_UNUSED(title);
}
@end

QT_BEGIN_NAMESPACE

void macStartIntercept(SEL originalSel, SEL fakeSel, Class baseClass, Class proxyClass)
{
#ifndef QT_MAC_USE_COCOA
    if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_5)
#endif
    {
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
        // The following code replaces the _implementation_ for the selector we want to hack
        // (originalSel) with the implementation found in proxyClass. Then it creates
        // a new 'backup' method inside baseClass containing the old, original,
        // implementation (fakeSel). You can let the proxy implementation of originalSel
        // call fakeSel if needed (similar approach to calling a super class implementation).
        // fakeSel must also be implemented in proxyClass, as the signature is used
        // as template for the method one we add into baseClass.
        // NB: You will typically never create any instances of proxyClass; we use it
        // only for stealing its contents and put it into baseClass. 
        Method originalMethod = class_getInstanceMethod(baseClass, originalSel);
        Method newMethod = class_getInstanceMethod(proxyClass, originalSel);
        Method fakeMethod = class_getInstanceMethod(proxyClass, fakeSel);

        IMP originalImp = method_setImplementation(originalMethod, method_getImplementation(newMethod));
        class_addMethod(baseClass, fakeSel, originalImp, method_getTypeEncoding(fakeMethod));
#endif
    }
}

void macStopIntercept(SEL originalSel, SEL fakeSel, Class baseClass, Class /* proxyClass */)