Mac/Python/pyGUSISIOUX.cp

   1 /*
   2 ** Modified version of GUSISIOUX.cp especially for Python.
   3 ** Changes (by Jack):
   4 ** - Optionally delay the console window until something is written to it.
   5 ** - Tell the upper layers whether the last command was a read or a write.
   6 ** - Tell SIOUX not to use WaitNextEvent (both Python and SIOUX trying to be
   7 **   nice to background apps means we're yielding almost 100% of the time).
   8 ** - Make sure signals are processed when returning from read/write.
   9 */
  10 #define GUSI_SOURCE
  11 #include "GUSIInternal.h"
  12 #include "GUSISIOUX.h"
  13 #include "GUSIDevice.h"
  14 #include "GUSIDescriptor.h"
  15 #include "GUSIBasics.h"
  16 #include "GUSIDiag.h"
  17 //#ifndef WITHOUT_JACK_MODS
  18 //#include "GUSIConfig.h"
  19 //#endif
  20
  21 #include <LowMem.h>
  22
  23 #include <fcntl.h>
  24 #include <sys/stat.h>
  25 #include <sys/ioctl.h>
  26 #include <errno.h>
  27 #include <console.h>
  28
  29 #include "Python.h"
  30 #include "macglue.h"
  31 extern Boolean SIOUXUseWaitNextEvent;
  32
  33 static PyReadHandler sInConsole = 0L;
  34 static PyWriteHandler sOutConsole = 0L;
  35 static PyWriteHandler sErrConsole = 0L;
  36
  37 inline bool hasCustomConsole(void) { return sInConsole != 0L; }
  38
  39 class GUSISIOUXSocket : public GUSISocket {
  40 public:
  41         ~GUSISIOUXSocket();
  42
  43
  44 ssize_t read(const GUSIScatterer & buffer);
  45 ssize_t write(const GUSIGatherer & buffer);
  46 virtual int     ioctl(unsigned int request, va_list arg);
  47 virtual int     fstat(struct stat * buf);
  48 virtual int     isatty();
  49 bool select(bool * canRead, bool * canWrite, bool *);
  50
  51         static GUSISIOUXSocket *        Instance(int fd);
  52 private:
  53         GUSISIOUXSocket(int fd);
  54         static bool initialized;
  55         static void Initialize();
  56         int fFd;
  57 };
  58 class GUSISIOUXDevice : public GUSIDevice {
  59 public:
  60         static GUSISIOUXDevice *        Instance();
  61
  62
  63 virtual bool Want(GUSIFileToken & file);
  64 virtual GUSISocket * open(GUSIFileToken &, int flags);
  65 private:
  66         GUSISIOUXDevice()                                                               {}
  67
  68         static GUSISIOUXDevice *        sInstance;
  69 };
  70
  71 GUSISIOUXSocket * GUSISIOUXSocket::Instance(int fd)
  72 {
  73         return new GUSISIOUXSocket(fd);
  74 }
  75 // This declaration lies about the return type
  76 extern "C" void SIOUXHandleOneEvent(EventRecord *userevent);
  77
  78 bool GUSISIOUXSocket::initialized = false;
  79
  80 GUSISIOUXSocket::GUSISIOUXSocket(int fd) : fFd(fd)
  81 {
  82         if (!hasCustomConsole()) {
  83                 if (!PyMac_GetDelayConsoleFlag() && !initialized)
  84                         Initialize();
  85                 /* Tell the upper layers there's no unseen output */
  86                 PyMac_OutputSeen();
  87         }
  88 }
  89
  90 void
  91 GUSISIOUXSocket::Initialize()
  92 {
  93         if(!initialized && !hasCustomConsole())
  94         {
  95                 initialized = true;
  96                 InstallConsole(0);
  97                 GUSISetHook(GUSI_EventHook+nullEvent,   (GUSIHook)SIOUXHandleOneEvent);
  98                 GUSISetHook(GUSI_EventHook+mouseDown,   (GUSIHook)SIOUXHandleOneEvent);
  99                 GUSISetHook(GUSI_EventHook+mouseUp,     (GUSIHook)SIOUXHandleOneEvent);
 100                 GUSISetHook(GUSI_EventHook+updateEvt,   (GUSIHook)SIOUXHandleOneEvent);
 101                 GUSISetHook(GUSI_EventHook+diskEvt,     (GUSIHook)SIOUXHandleOneEvent);
 102                 GUSISetHook(GUSI_EventHook+activateEvt, (GUSIHook)SIOUXHandleOneEvent);
 103                 GUSISetHook(GUSI_EventHook+osEvt,               (GUSIHook)SIOUXHandleOneEvent);
 104                 PyMac_InitMenuBar();
 105         }
 106 }
 107 GUSISIOUXSocket::~GUSISIOUXSocket()
 108 {
 109         if ( !initialized || hasCustomConsole() )
 110                 return;
 111
 112         initialized = false;
 113         RemoveConsole();
 114 }
 115 ssize_t GUSISIOUXSocket::read(const GUSIScatterer & buffer)
 116 {
 117         if(hasCustomConsole())
 118         {
 119                 if(fFd == 0)
 120                         return buffer.SetLength(
 121                                 sInConsole((char *) buffer.Buffer(), (int)buffer.Length()));
 122
 123                 return 0;
 124         }
 125
 126         if ( !initialized ) Initialize();
 127         GUSIStdioFlush();
 128         PyMac_OutputSeen();
 129         PyMac_RaiseConsoleWindow();
 130         return buffer.SetLength(
 131                 ReadCharsFromConsole((char *) buffer.Buffer(), (int)buffer.Length()));
 132         GUSIContext::Yield(kGUSIPoll);
 133 }
 134 ssize_t GUSISIOUXSocket::write(const GUSIGatherer & buffer)
 135 {
 136         if(hasCustomConsole())
 137         {
 138                 if(fFd == 1)
 139                         return sOutConsole((char *) buffer.Buffer(), (int)buffer.Length());
 140                 else if(fFd == 2)
 141                         return sErrConsole((char *) buffer.Buffer(), (int)buffer.Length());
 142
 143                 return 0;
 144         }
 145
 146         ssize_t rv;
 147
 148         if ( !initialized ) Initialize();
 149         PyMac_OutputNotSeen();
 150         SIOUXUseWaitNextEvent = false;
 151         rv = WriteCharsToConsole((char *) buffer.Buffer(), (int)buffer.Length());
 152         GUSIContext::Yield(kGUSIPoll);
 153         return rv;
 154 }
 155 int GUSISIOUXSocket::ioctl(unsigned int request, va_list)
 156 {
 157         switch (request)        {
 158         case FIOINTERACTIVE:
 159                 return 0;
 160         default:
 161                 return GUSISetPosixError(EOPNOTSUPP);
 162         }
 163 }
 164 int     GUSISIOUXSocket::fstat(struct stat * buf)
 165 {
 166         GUSISocket::fstat(buf);
 167         buf->st_mode =  S_IFCHR | 0666;
 168
 169         return 0;
 170 }
 171 int GUSISIOUXSocket::isatty()
 172 {
 173         return 1;
 174 }
 175 static bool input_pending()
 176 {
 177         return false;
 178 }
 179
 180 bool GUSISIOUXSocket::select(bool * canRead, bool * canWrite, bool *)
 181 {
 182         if ( !initialized ) Initialize();
 183         bool cond = false;
 184         if (canRead)
 185                 if (*canRead = input_pending())
 186                         cond = true;
 187         if (canWrite)
 188                 cond = *canWrite = true;
 189
 190         return cond;
 191 }
 192 GUSISIOUXDevice * GUSISIOUXDevice::sInstance;
 193 GUSISIOUXDevice * GUSISIOUXDevice::Instance()
 194 {
 195         if (!sInstance)
 196                 sInstance = new GUSISIOUXDevice();
 197         return sInstance;
 198 }
 199 bool GUSISIOUXDevice::Want(GUSIFileToken & file)
 200 {
 201         switch (file.WhichRequest()) {
 202         case GUSIFileToken::kWillOpen:
 203                 return file.IsDevice() && (file.StrStdStream(file.Path()) > -1);
 204         default:
 205                 return false;
 206         }
 207 }
 208 GUSISocket * GUSISIOUXDevice::open(GUSIFileToken &, int)
 209 {
 210         return GUSISIOUXSocket::Instance(1);
 211 }
 212 void GUSISetupConsoleDescriptors()
 213 {
 214         GUSIDescriptorTable * table = GUSIDescriptorTable::Instance();
 215
 216         table->InstallSocket(GUSISIOUXSocket::Instance(0));
 217         table->InstallSocket(GUSISIOUXSocket::Instance(1));
 218         table->InstallSocket(GUSISIOUXSocket::Instance(2));
 219 }
 220
 221 void PyMac_SetConsoleHandler(PyReadHandler stdinH, PyWriteHandler stdoutH, PyWriteHandler stderrH)
 222 {
 223         if(stdinH && stdoutH && stderrH)
 224         {
 225                 sInConsole = stdinH;
 226                 sOutConsole = stdoutH;
 227                 sErrConsole = stderrH;
 228         }
 229 }
 230
 231 long PyMac_DummyReadHandler(char *buffer, long n)
 232 {
 233         return 0;
 234 }
 235
 236 long PyMac_DummyWriteHandler(char *buffer, long n)
 237 {
 238         return 0;
 239 }