/*

    File:       UIHandling.c

    Contains:   Basic RunApplicationEventLoop-based UI handling, Carbon API

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    Copyright © 1999-2001 Apple Computer, Inc., All Rights Reserved

*/

#ifdef __APPLE_CC__

#include <Carbon/Carbon.h>

#else

#include <Carbon.h>

#endif

#include "CGDrawPicture.h"

#include "NavServicesHandling.h"

#include "UIHandling.h"

#define kMyApplicationSignature     'dgcg'

#define kMyPrintInfoProperty        'cgdt'

#define kInsetBits      40

static OSStatus Initialize(void);

static pascal OSErr QuitAppleEventHandler(const AppleEvent *appleEvt, AppleEvent* reply, long refcon);

static pascal OSErr MyHandleODoc(const AppleEvent *theAppleEvent, AppleEvent* reply, long handlerRefCon);

static OSErr MyGotRequiredParams(const AppleEvent *theAppleEvent);

static pascal OSStatus myWinEvtHndlr(EventHandlerCallRef myHandler, EventRef event, void* userData);

static pascal OSStatus DoAppCommandProcess(EventHandlerCallRef nextHandler, EventRef theEvent, void* userData);

static OSStatus InstallAppEvents(void);

static void HandleWindowUpdate(WindowRef window, const void *dataP);

static void DoAboutBox(void);

static OSStatus handleDroppedFSSpec(FSSpec *theDroppedSpec);

NavEventUPP gNavEventProc;      // event proc for our Nav Dialogs 

Rect        gMainScreenRect;

RgnHandle   gScratchRgn;

static IBNibRef gNibRef;

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

{

    OSStatus        err;

    // 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"), &gNibRef);

    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(gNibRef, CFSTR("MenuBar"));

    require_noerr( err, CantSetMenuBar );

    DisableMenuCommand(NULL, kHICommandSave);       // we can't save as PDF unless the window content allows it

    err = Initialize();

    require_noerr( err, CantInitialize );

    // prompt for a document

    err = DoOpenDocument();

    require_noerr( err, CantOpenDocument );

    // Call the event loop

    RunApplicationEventLoop();

CantSetMenuBar:

CantGetNibRef:

CantInitialize:

CantOpenDocument:

    return err;

}

static OSStatus Initialize()

{

    OSErr   err;

        BitMap bitMap;

    InitCursor();

        (void)GetQDGlobalsScreenBits(&bitMap);

        SetRect(&gMainScreenRect, 0, 0, 

                    bitMap.bounds.right - kInsetBits, 

                    bitMap.bounds.bottom - kInsetBits

                    );

        gScratchRgn = NewRgn();

    gNavEventProc = NewNavEventUPP(NavEventProc);

        err = AEInstallEventHandler(kCoreEventClass, kAEQuitApplication, 

                                NewAEEventHandlerUPP(QuitAppleEventHandler), 0, false);

    if (!err)

            err = InstallAppEvents();

        if(!err)

            err = AEInstallEventHandler(kCoreEventClass, kAEOpenDocuments, 

                    NewAEEventHandlerUPP(MyHandleODoc), 0, false);

        if(!err)

            err = CreateSheetDoneProcs();

        return err;

}

WindowRef MakeWindow(const void *refCon)

{

    WindowRef   window = NULL;  // initialize to NULL

    OSStatus    err = noErr;

    EventTypeSpec   list[] = {{kEventClassWindow, kEventWindowClose },

                                { kEventClassWindow, kEventWindowDrawContent },

                                { kEventClassWindow, kEventWindowBoundsChanged }, 

                                { kEventClassWindow, kEventWindowActivated }

                                };

    static EventHandlerUPP winEvtHandler = NULL;        // window event handler

    // if we haven't already made our window event handler UPP then do so now

    if(!winEvtHandler){

        winEvtHandler = NewEventHandlerUPP(myWinEvtHndlr);

        if(!winEvtHandler)

        err = memFullErr;

    }

    if(!err)

        err = CreateWindowFromNib(gNibRef, CFSTR("Window"), &window);

    if(!err){

        EventHandlerRef ref;

        err = InstallWindowEventHandler(window, winEvtHandler, 

                sizeof(list)/sizeof(EventTypeSpec), list, NULL, &ref);

        // attach our document data to the window

        if(!err)err = SetWindowProperty(window,  

                kMyApplicationSignature, kMyPrintInfoProperty,

                sizeof(refCon),

                &refCon);

        if(err){

        DisposeWindow(window);

        window = NULL;

        }

        }

        return window;

}

static OSStatus InstallAppEvents(void)

{

    EventTypeSpec  eventType;

        EventHandlerUPP gAppCommandProcess = NewEventHandlerUPP(DoAppCommandProcess);

    eventType.eventClass = kEventClassCommand;

    eventType.eventKind = kEventCommandProcess;

    InstallApplicationEventHandler(gAppCommandProcess, 1, &eventType, NULL, NULL);

        return noErr;

}

static pascal OSStatus myWinEvtHndlr(EventHandlerCallRef myHandler, EventRef event, void* userData)

{

#pragma unused (myHandler, userData)

    WindowRef           window;

    Rect            bounds;

    OSStatus            result = eventNotHandledErr;

    GetEventParameter(event, kEventParamDirectObject, typeWindowRef, NULL, sizeof(window), NULL, &window);

    if (GetEventKind(event) == kEventWindowDrawContent)

    {

        void *ourDataP = GetOurWindowProperty(window);

        if(ourDataP){

            HandleWindowUpdate(window, ourDataP);

            result = noErr;

        }

    }

    else if (GetEventKind(event) == kEventWindowBoundsChanged)

    {

        InvalWindowRect(window, GetWindowPortBounds(window, &bounds));

        result = noErr;

    }

    else if (GetEventKind(event) == kEventWindowActivated)

    {

        Boolean canSave = CanSaveAsPDF(GetOurWindowProperty(window));

        // check whether the window allows for save as PDF and enable/disable the menu accordingly

        if(canSave)

            EnableMenuCommand(NULL, kHICommandSave);

        else

            DisableMenuCommand(NULL, kHICommandSave);

        // don't change the result 

    }

    else if (GetEventKind(event) == kEventWindowClose)

    {

        DisposeWindowPrivateData(GetOurWindowProperty(window));

        if(window == FrontWindow()){            // if we were the front window, disable the ability to save

            DisableMenuCommand(NULL, kHICommandSave);

        }

        DisposeWindow(window);

        result = noErr;

    }

    return result;

}

// Handle command-process events at the application level

pascal OSStatus DoAppCommandProcess(EventHandlerCallRef nextHandler, EventRef theEvent, void* userData)

{

#pragma unused (userData)

    HICommand  aCommand;

    OSStatus   result;

    GetEventParameter(theEvent, kEventParamDirectObject, typeHICommand, NULL, sizeof(HICommand), NULL, &aCommand);

    switch (aCommand.commandID)

    {

    case kHICommandAbout:

        DoAboutBox();

        result = noErr; 

        break;

    case kHICommandOpen:

        (void)DoOpenDocument();

        result = noErr;

        break;

    case kHICommandSave:

    {

        WindowRef w = FrontWindow(); // this menu should only be enabled when we can save as PDF

        void *ourDataP = GetOurWindowProperty(w);

        if(ourDataP && CanSaveAsPDF(ourDataP)){

        (void)DoSaveAsPDF(w, ourDataP);

        result = noErr;

        }   // if we can't save as PDF then pass this event on to someone else

    }

        break;

    case kHICommandPageSetup:

    {

        WindowRef w = FrontWindow();

        void *ourDataP = GetOurWindowProperty(w);

        if(ourDataP){

        (void)DoPageSetup(w, ourDataP);

        result = noErr;

        }

    }

        break;

    case kHICommandPrint:

    {

        WindowRef w = FrontWindow();

        void *ourDataP = GetOurWindowProperty(w);

        if(ourDataP){

        (void)DoPrint(w, ourDataP);

        result = noErr;

        }

    }

        break;

    case kHICommandQuit:

        QuitApplicationEventLoop();

        result = noErr;

        break;

    default:

        result = eventNotHandledErr;

        break;

    }

      HiliteMenu(0);

      return result;

}

static void HandleWindowUpdate(WindowRef window, const void *ourPrivateDataP)

{

    if(ourPrivateDataP){

    Rect bounds;

    PageDrawProc *drawProc = GetMyDrawPageProc(ourPrivateDataP);    // get the needed draw proc

    CGrafPtr savePort;

    GetPort(&savePort);

    SetPortWindowPort(window);

    EraseRect(GetWindowPortBounds(window, &bounds));

    (void)drawProc(ourPrivateDataP, 1.);    // pass in our app scaling factor

    SetPort(savePort);

    }

}

static pascal OSErr QuitAppleEventHandler(const AppleEvent *appleEvt, AppleEvent* reply, long refcon)

{

#pragma unused (appleEvt, reply, refcon)

    QuitApplicationEventLoop();

//#pragma noreturn (QuitAppleEventHandler)

        return 128;

}

static void DoAboutBox()

{   

    CFStringRef ourString = NULL;

    SInt16      alertItemHit = 0;

    Str255      stringBuf;

    ourString =  CFCopyLocalizedString(kAboutBoxStringKey, NULL);

    if (ourString != NULL)

    {

    if (CFStringGetPascalString (ourString, stringBuf, sizeof(stringBuf), GetApplicationTextEncoding()))

    {

        StandardAlert(kAlertStopAlert, stringBuf, NULL, NULL, &alertItemHit);

    }

    CFRelease (ourString);                             

    }

}

static pascal OSErr MyHandleODoc(const AppleEvent *theAppleEvent, AppleEvent* reply, long handlerRefCon)

{

    FSSpec myFSS;

    AEDescList docList;

    OSErr err = noErr;

    long index, itemsInList;

    Size actualSize;

    AEKeyword keywd;

    DescType returnedType;

    #pragma unused(reply, handlerRefCon)

    // get the direct parameter--a descriptor list--and put it into a docList

    if (!err) err = AEGetParamDesc(theAppleEvent, keyDirectObject, typeAEList, &docList);

    // check for missing parameters

    if (!err) err = MyGotRequiredParams(theAppleEvent);

    // count the number of descriptor records in the list

    if (!err) err = AECountItems(&docList, &itemsInList);

    // now get each descriptor record from the list, coerce the returned

    // data to an FSSpec record, and open the associated file

    for (index = 1; index <= itemsInList && !err; index++) {

        err = AEGetNthPtr(&docList, index, typeFSS, &keywd, &returnedType, (Ptr)&myFSS, sizeof(myFSS), &actualSize);

        if(!err)err = handleDroppedFSSpec(&myFSS);

    }

    if (!err) err = AEDisposeDesc(&docList);

    return 128;

}

static OSStatus handleDroppedFSSpec(FSSpec *theDroppedSpec)

{

    OSStatus err = noErr;

    Boolean             isFolder;

    CInfoPBRec          catInfoRec;

    catInfoRec.dirInfo.ioNamePtr = theDroppedSpec->name;

    catInfoRec.dirInfo.ioFDirIndex = 0;

    catInfoRec.dirInfo.ioVRefNum = theDroppedSpec->vRefNum;

    catInfoRec.dirInfo.ioDrDirID = theDroppedSpec->parID;

    err = PBGetCatInfoSync(&catInfoRec);

    if(!err)

    isFolder = (catInfoRec.hFileInfo.ioFlAttrib & (1 << 4)) != 0;

    if(!err){

    if(isFolder){

        err = noErr;    // we don't do anything for folder

    }else{

        err = doTheFile(theDroppedSpec);

    }

    }

    return err;

}

static OSErr MyGotRequiredParams(const AppleEvent *theAppleEvent)

{

    DescType returnedType;

    Size actualSize;

    OSErr err;

    err = AEGetAttributePtr(theAppleEvent, keyMissedKeywordAttr, typeWildCard, &returnedType, nil, 0, &actualSize);

    if (err == errAEDescNotFound)   // you got all the required parameters

    return noErr;

    else if (!err)          // you missed a required parameter

    return errAEEventNotHandled;

    else                    // the call to AEGetAttributePtr failed

    return err;

}

void *GetOurWindowProperty(WindowRef window)

{

    UInt32 infoSize = sizeof(void *), actualSize;

    void *ourDataP = NULL;

    if(noErr != GetWindowProperty(window,  

            kMyApplicationSignature, kMyPrintInfoProperty,

            infoSize, &actualSize,

            &ourDataP))

    {

    ourDataP = NULL;

    }

    return ourDataP;

}

void DoErrorAlert(OSStatus status, CFStringRef errorFormatString)

{   

    CFStringRef formatStr = NULL, printErrorMsg = NULL;

    SInt16      alertItemHit = 0;

    Str255      stringBuf;

    if ((status != noErr) && (status != kPMCancel))           

    {

        formatStr =  CFCopyLocalizedString (errorFormatString, NULL);   

    if (formatStr != NULL)

        {

            printErrorMsg = CFStringCreateWithFormat(        

                       NULL, NULL, 

                       formatStr, status);

            if (printErrorMsg != NULL)

            {

                if (CFStringGetPascalString (printErrorMsg,    

                              stringBuf, sizeof(stringBuf), 

                              GetApplicationTextEncoding()))

        {

                    StandardAlert(kAlertStopAlert, stringBuf, 

                                NULL, NULL, &alertItemHit);

        }

                CFRelease (printErrorMsg);                     

            }

           CFRelease (formatStr);                             

        }

    }

}