Source/UIHandling.c

/*
    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);                             
        }
    }
}