Celestin Apprentice 2/Apprentice-Release2.iso/Source Code/C/Frameworks/Dragonsmith 1.1.1/CW 4.5 Update/DPasser.cp

Text File | 1994-07-04 | 5.5 KB | 214 lines | [TEXT/MMCC]

/*
    DPasser.c

    Pass 'odoc' events to other processes (e.g., other dragons running under the THINK C Debugger)

    NOTE:    I'm not sure what to do about stationery handling…  Then again, who's gonna drop
            stationery on a dragon?  Drop and RUN!!!

    Created    25 Apr 1992    Basic code, doesn't work
    Modified    29 Aug 1992    Began a rewrite to use the new Dragonsmith
                        First build (v0.1) — I'll use TMON Pro to debug it; then, when it's stable, I
                            can debug it with (well, another copy of) itself!
            04 Sep 1992    Added Options menu with a single item Target…
            15 Jan 1994    Fixed memory leak in PassDroppings
      01 Jul 1994 Francis H Schiffer, 3rd - change FilterOutMyself to use LowMem
                        accessor function LMGetCurApName(void)


    Copyright © 1992–1994 by Paul M. Hoffman
    Send comments or suggestions to [e-mail] -or- [e-mail]

    This code may be freely used, altered, and distributed in any way you want as long as:
        1.    It is GIVEN away rather than sold;
        2.    This statement and the above copyright notice are left intact.

*/

#include    "Dragon.h"
#include    <EPPC.h>
#include    <Packages.h>        // For IUEqualString

#define    kNoDefaultApp        FALSE

enum {
    mOptions = mEdit + 1
};

enum {
    iChooseTarget = 1
};

class DPasser: public Dragon {

    protected:
        AppleEvent        odocEvent;
        PortInfoRec        targetPortInfo;
        TargetID            targetID;
        AEAddressDesc    targetAddress;
        Boolean            haveTarget;
        MenuHandle        optionsMenu;

    public:
                        DPasser (void);
        virtual void        Start (void);
        virtual OSErr        ProcessDroppings (AEDescList *docList);    // Override
        virtual OSErr        PassDroppings (AEDescList *docList);
        virtual Boolean    ProcessLoneDoc (AEDescList *docList);
        virtual void        AskForTarget (void);

    protected:
        virtual void        SetUpMenus (void);
        virtual void        DoMenu (long menuItemCode);
        virtual void        DoOptionsMenu (short itemNum);
};

// Filter function for PPCBrowser —
    pascal Boolean FilterOutMyself (LocationNameRec *locName, PortInfoRec *portInfo);

Dragon *CreateGDragon (void)
{
    return (Dragon *) new DPasser;
}

DPasser::DPasser (void)
{
    targetAddress.descriptorType = typeNull;
    targetAddress.dataHandle = NULL;

    HLockHi ((Handle) this);        // This simplifies a lot of things later…

    haveTarget = FALSE;

    optionsMenu = NULL;
}

void DPasser::Start (void)
{
    OSErr    err;

    inherited::Start ();

    err = PPCInit ();
    if (err != noErr)
        Abort (err);

}

OSErr DPasser::ProcessDroppings (AEDescList *docList)
{
    long            numDroppings;
    OSErr        err;
    AppleEvent    theEvent;

    AEDesc        srcDesc;
    DescType    retType;
    short        source;
    long            retSize;

    err = AEGetTheCurrentEvent (&theEvent);
    err = AEGetAttributePtr (&theEvent, 'esrc', 'shor', &retType, (Ptr) &source, sizeof (source), &retSize);

    err = AECountItems (docList, &numDroppings);
    if (err == noErr) {
        BeginProcessing ();
        if (numDroppings != 1 || !ProcessLoneDoc (docList)) {
            if (!haveTarget)
                AskForTarget ();
            if (haveTarget)
                err = PassDroppings (docList);
        }
        EndProcessing ();
    }
    return err;
}

OSErr DPasser::PassDroppings (AEDescList *docList)
{
    OSErr        err;
    AppleEvent    reply;

    err = AECreateAppleEvent (kCoreEventClass, kAEOpenDocuments, &targetAddress,
                            kAutoGenerateReturnID, kAnyTransactionID, &odocEvent);
    if (err != noErr) return err;

    err = AEPutParamDesc (&odocEvent, keyDirectObject, docList);
    if (err != noErr) return err;

    err = AESend (&odocEvent, &reply, kAENoReply + kAECanInteract,
                                            kAENormalPriority, 60, NULL, NULL);
// BEGIN bug-fix 1.1.1
    (void) AEDisposeDesc (&odocEvent);    // Don't forget to dispose of our copy of the sent event!
// END bug-fix 1.1.1

    return err;
}

Boolean DPasser::ProcessLoneDoc (AEDescList *docList)
{
    // Return TRUE if we were able to process the doc all by itself, or FALSE if there's nothing special about it

    return FALSE;        // I'll implement drag-and-drop of "special files" later
}

void DPasser::AskForTarget (void)
{
    EventRecord        event;
    OSErr            err;
    unsigned char        prompt[] = "\pChoose a program to pass the event to:";        // Hard-coded string (tsk, tsk!)
    unsigned char        appListLabel[] = "\pPrograms:";                        // Hard-coded string (tsk, tsk!)
    AEAddressDesc    targetAddress;

    err = PPCBrowser ((ConstStr255Param) &prompt, (ConstStr255Param) &appListLabel,
                kNoDefaultApp, &targetID.location, &targetPortInfo, FilterOutMyself, NULL);
    if (err == noErr) {
        targetID.name = targetPortInfo.name;        // Don't worry, this is a struct copy, not an array copy
        AEDisposeDesc (&this->targetAddress);    // Get rid of the old target (if there was one)
        err = AECreateDesc (typeTargetID, (Ptr) &targetID, sizeof (TargetID), &targetAddress);
        if (err == noErr) {
            this->targetAddress = targetAddress;
            haveTarget = TRUE;
        }
    }
}

void DPasser::SetUpMenus (void)
{
    inherited::SetUpMenus ();            // Add the Apple, File, and Edit menus

    optionsMenu = GetMenu (mOptions);
    InsertMenu (optionsMenu, 0);

    DrawMenuBar ();
}

void DPasser::DoMenu (long menuItemCode)
{
    short    menuID, itemNum;

    menuID = menuItemCode >> 16;
    itemNum = menuItemCode & 0xFFFF;

    if (menuID == mOptions)
        DoOptionsMenu (itemNum);
    else
        inherited::DoMenu (menuItemCode);
}

void DPasser::DoOptionsMenu (short itemNum)
{
    switch (itemNum) {
        case iChooseTarget:
            AskForTarget ();
            break;
        default:
            break;
    }
}

pascal Boolean FilterOutMyself (LocationNameRec *locName, PortInfoRec *portInfo)
{
            // fhs 1994 July 4 - change to use LowMem accessor function LMGetCurApName(void)
    return IUEqualString (portInfo->name.name, LMGetCurApName( ));        // IUEqualString doesn't move memory, so this is safe
}