/*

File: main.c

Abstract: Main source for this sample project.

Version: 1.0

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may be used to endorse or promote products derived from the Apple

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as expressly stated in this notice, no other rights or licenses, express

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MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS

FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND

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IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL

OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

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Copyright © 2007 Apple Inc. All Rights Reserved

*/

#include <Carbon/Carbon.h>

#include "EditViewController.h"

#include "common.h"

static OSStatus AppEventHandler(EventHandlerCallRef inCaller, EventRef inEvent, void* inRefcon);

static OSStatus HandleNew(void);

static OSStatus WindowEventHandler(EventHandlerCallRef inCaller, EventRef inEvent, void* inRefcon);

HIViewRef gEditField;

static IBNibRef sNibRef;

//--------------------------------------------------------------------------------------------

// Since NSNotifications work between Objective-C objects, we need to establish a "listener"

// object to receive notifications from the Cocoa side (from our EditViewController object).

//

@interface ourObserver : NSObject

{}

@end

@implementation ourObserver

-(void)textChanged:(NSNotification*)note

{

    verify(gEditField);

    HIViewSetText(gEditField, (CFStringRef)[[note userInfo] objectForKey:@"changedText"]);

}

@end

ourObserver* observer;

//--------------------------------------------------------------------------------------------

#define kCarbonEdit 'carb'  // signature for the HITextView control

#define kCocoaEdit  'coca'  // signature of the HICocoaView that embeds the NSTextField

const HIViewID kCarbonEditID    = { kCarbonEdit, 1 };   // HITextView control

const HIViewID kCocoaEditID     = { kCocoaEdit, 2 };    // HICocoaView control

//--------------------------------------------------------------------------------------------

int main(int argc, char* argv[])

{

    OSStatus err = noErr;

    static const EventTypeSpec kAppEvents[] = { { kEventClassCommand, kEventCommandProcess } };

    // Create a Nib reference, passing the name of the nib file (without the .nib extension).

    // CreateNibReference only searches into the application bundle.

    err = CreateNibReference(CFSTR("main"), &sNibRef);

    require_noerr(err, CantGetNibRef);

    // Once the nib reference is created, set the menu bar. "MainMenu" is the name of the menu bar

    // object. This name is set in InterfaceBuilder when the nib is created.

    err = SetMenuBarFromNib(sNibRef, CFSTR("MenuBar"));

    require_noerr(err, CantSetMenuBar);

    // Install our handler for common commands on the application target

    InstallApplicationEventHandler(NewEventHandlerUPP(AppEventHandler), GetEventTypeCount(kAppEvents), kAppEvents, 0, NULL);

    NSApplicationLoad();    // needed for Carbon based applications which call into Cocoa

    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init]; // make sure to setup our own autorelease pool as a Carbon app

    observer = [[ourObserver alloc] init];

    [[NSNotificationCenter defaultCenter] addObserver:observer selector:@selector(textChanged:) name:CustomEventNotification object:nil];

    HandleNew();    // create our window

    [pool release];

    RunApplicationEventLoop();   // run the event loop

    [[NSNotificationCenter defaultCenter] removeObserver:observer];

    [observer release];

CantSetMenuBar:

CantGetNibRef:

    return err;

}

//--------------------------------------------------------------------------------------------

static OSStatus AppEventHandler(EventHandlerCallRef inCaller, EventRef inEvent, void* inRefcon)

{

    OSStatus result = eventNotHandledErr;

    switch (GetEventClass(inEvent))

    {

        case kEventClassCommand:

        {

            HICommandExtended cmd;

            verify_noerr(GetEventParameter(inEvent, kEventParamDirectObject, typeHICommand, NULL, sizeof(cmd), NULL, &cmd));

            switch (GetEventKind(inEvent))

            {

                case kEventCommandProcess:

                    switch (cmd.commandID)

                    {

                        case kHICommandNew:

                            result = HandleNew();

                            break;

                        default:

                            break;

                    }

                    break;

            }

            break;

        }

        default:

            break;

    }

    return result;

}

//--------------------------------------------------------------------------------------------

DEFINE_ONE_SHOT_HANDLER_GETTER(WindowEventHandler)

//--------------------------------------------------------------------------------------------

static OSStatus HandleNew()

{

    OSStatus err = noErr;

    WindowRef window;

    static const EventTypeSpec kWindowEvents[] = { { kEventClassKeyboard, kEventRawKeyDown } };

    // Create a window. "MainWindow" is the name of the window object. This name is set in 

    // InterfaceBuilder when the nib is created.

    err = CreateWindowFromNib(sNibRef, CFSTR("MainWindow"), &window);

    require_noerr(err, CantCreateWindow);

    // Install a command handler on the window. We don't use this handler yet, but nearly all

    // Carbon apps will need to handle commands, so this saves everyone a little typing.

    InstallWindowEventHandler(window, GetWindowEventHandlerUPP(), GetEventTypeCount(kWindowEvents), kWindowEvents, window, NULL);

    // setup our HIView to contain the Cocoa WebKit view

    // here we will use NSViewController to gain access to our nib-based NSView.

    //

    EditViewController* viewController = [[EditViewController alloc] initWithNibName:@"EditView" bundle:nil];

    SetWRefCon(window, (SRefCon)viewController);    // used for view controller disposal when the window is closed

    HIViewRef view;

    err = HIViewFindByID(HIViewGetRoot(window), kCocoaEditID, &view);

    NSView* cocoaView = [viewController view];          // get a reference to our NSView to set in our HICocoaView

    if (cocoaView != NULL)

        err = HICocoaViewSetView(view, cocoaView);  // embed our NSView within our HICocoaView

    err = HIViewFindByID(HIViewGetRoot(window), kCarbonEditID, &gEditField);

    // The window was created hidden, so show it

    ShowWindow(window);

CantCreateWindow:

    return err;

}

//--------------------------------------------------------------------------------------------

static OSStatus WindowEventHandler(EventHandlerCallRef inCaller, EventRef inEvent, void* inRefcon)

{

    OSStatus err = eventNotHandledErr;

    switch (GetEventClass(inEvent))

    {

        case kEventClassKeyboard:

        {

            switch (GetEventKind(inEvent))

            {

                case kEventRawKeyDown:

                {

                    // make sure the key event goes through so we can fetch the changed text

                    err = CallNextEventHandler(inCaller, inEvent);

                    CFStringRef changedText = NULL;

                    changedText = HIViewCopyText(gEditField);

                    if (changedText != NULL)

                    {

                        // package up the Carbon Event and include the text from the HITextView

                        EventRef evt;

                        if (CreateEvent(NULL, kEventClassCustom, kEventCustomCharTyped, 0, kEventAttributeNone, &evt) == noErr)

                        {

                            CFIndex strSize = CFStringGetLength(changedText) * sizeof(UniChar);

                            UniChar* buffer = NULL;

                            buffer = malloc(strSize * sizeof(UniChar));

                            if (buffer != NULL)

                            {

                                CFStringGetCharacters(changedText, CFRangeMake(0, strSize), buffer);

                                SetEventParameter(evt, kEventParamKeyUnicodes, typeUnicodeText, strSize, buffer);

                                // send our custom CarbonEvent to our Cocoa NSViewCotroller that the text has changed

                                PostEventToQueue(GetMainEventQueue(), evt, kEventPriorityStandard);

                                free(buffer);

                            }

                        }

                        CFRelease(changedText);

                    }

                    break;

                }

            }

            break;

        }

        default:

            break;

    }

    return err;

}