rosapps/smartpdf/fitz/apps/mozilla/npunix.c

   1 /*
   2  * npunix.c
   3  *
   4  * Netscape Client Plugin API
   5  * - Wrapper function to interface with the Netscape Navigator
   6  *
   7  * dp Suresh <dp@netscape.com>
   8  *
   9  *----------------------------------------------------------------------
  10  * PLUGIN DEVELOPERS:
  11  *      YOU WILL NOT NEED TO EDIT THIS FILE.
  12  *----------------------------------------------------------------------
  13  */
  14
  15 #define XP_UNIX 1
  16
  17 #include <stdio.h>
  18 #include "npapi.h"
  19 #include "npupp.h"
  20
  21 /*
  22  * Define PLUGIN_TRACE to have the wrapper functions print
  23  * messages to stderr whenever they are called.
  24  */
  25
  26 #ifdef PLUGIN_TRACE
  27 #include <stdio.h>
  28 #define PLUGINDEBUGSTR(msg)     fprintf(stderr, "%s\n", msg)
  29 #else
  30 #define PLUGINDEBUGSTR(msg)
  31 #endif
  32
  33
  34 /***********************************************************************
  35  *
  36  * Globals
  37  *
  38  ***********************************************************************/
  39
  40 static NPNetscapeFuncs   gNetscapeFuncs;        /* Netscape Function table */
  41
  42
  43 /***********************************************************************
  44  *
  45  * Wrapper functions : plugin calling Netscape Navigator
  46  *
  47  * These functions let the plugin developer just call the APIs
  48  * as documented and defined in npapi.h, without needing to know
  49  * about the function table and call macros in npupp.h.
  50  *
  51  ***********************************************************************/
  52
  53 void
  54 NPN_Version(int* plugin_major, int* plugin_minor,
  55              int* netscape_major, int* netscape_minor)
  56 {
  57         *plugin_major = NP_VERSION_MAJOR;
  58         *plugin_minor = NP_VERSION_MINOR;
  59
  60         /* Major version is in high byte */
  61         *netscape_major = gNetscapeFuncs.version >> 8;
  62         /* Minor version is in low byte */
  63         *netscape_minor = gNetscapeFuncs.version & 0xFF;
  64 }
  65
  66 NPError
  67 NPN_GetValue(NPP instance, NPNVariable variable, void *r_value)
  68 {
  69         return CallNPN_GetValueProc(gNetscapeFuncs.getvalue,
  70                                         instance, variable, r_value);
  71 }
  72
  73 NPError
  74 NPN_GetURL(NPP instance, const char* url, const char* window)
  75 {
  76         return CallNPN_GetURLProc(gNetscapeFuncs.geturl, instance, url, window);
  77 }
  78
  79 NPError
  80 NPN_PostURL(NPP instance, const char* url, const char* window,
  81              uint32 len, const char* buf, NPBool file)
  82 {
  83         return CallNPN_PostURLProc(gNetscapeFuncs.posturl, instance,
  84                                         url, window, len, buf, file);
  85 }
  86
  87 NPError
  88 NPN_RequestRead(NPStream* stream, NPByteRange* rangeList)
  89 {
  90         return CallNPN_RequestReadProc(gNetscapeFuncs.requestread,
  91                                         stream, rangeList);
  92 }
  93
  94 NPError
  95 NPN_NewStream(NPP instance, NPMIMEType type, const char *window,
  96               NPStream** stream_ptr)
  97 {
  98         return CallNPN_NewStreamProc(gNetscapeFuncs.newstream, instance,
  99                                         type, window, stream_ptr);
 100 }
 101
 102 int32
 103 NPN_Write(NPP instance, NPStream* stream, int32 len, void* buffer)
 104 {
 105         return CallNPN_WriteProc(gNetscapeFuncs.write, instance,
 106                                         stream, len, buffer);
 107 }
 108
 109 NPError
 110 NPN_DestroyStream(NPP instance, NPStream* stream, NPError reason)
 111 {
 112         return CallNPN_DestroyStreamProc(gNetscapeFuncs.destroystream,
 113                                                 instance, stream, reason);
 114 }
 115
 116 void
 117 NPN_Status(NPP instance, const char* message)
 118 {
 119         CallNPN_StatusProc(gNetscapeFuncs.status, instance, message);
 120 }
 121
 122 const char*
 123 NPN_UserAgent(NPP instance)
 124 {
 125         return CallNPN_UserAgentProc(gNetscapeFuncs.uagent, instance);
 126 }
 127
 128 void*
 129 NPN_MemAlloc(uint32 size)
 130 {
 131         return CallNPN_MemAllocProc(gNetscapeFuncs.memalloc, size);
 132 }
 133
 134 void NPN_MemFree(void* ptr)
 135 {
 136         CallNPN_MemFreeProc(gNetscapeFuncs.memfree, ptr);
 137 }
 138
 139 uint32 NPN_MemFlush(uint32 size)
 140 {
 141         return CallNPN_MemFlushProc(gNetscapeFuncs.memflush, size);
 142 }
 143
 144 void NPN_ReloadPlugins(NPBool reloadPages)
 145 {
 146         CallNPN_ReloadPluginsProc(gNetscapeFuncs.reloadplugins, reloadPages);
 147 }
 148
 149 JRIEnv* NPN_GetJavaEnv()
 150 {
 151         return CallNPN_GetJavaEnvProc(gNetscapeFuncs.getJavaEnv);
 152 }
 153
 154 jref NPN_GetJavaPeer(NPP instance)
 155 {
 156         return CallNPN_GetJavaPeerProc(gNetscapeFuncs.getJavaPeer,
 157                                        instance);
 158 }
 159
 160
 161 /***********************************************************************
 162  *
 163  * Wrapper functions : Netscape Navigator -> plugin
 164  *
 165  * These functions let the plugin developer just create the APIs
 166  * as documented and defined in npapi.h, without needing to
 167  * install those functions in the function table or worry about
 168  * setting up globals for 68K plugins.
 169  *
 170  ***********************************************************************/
 171
 172 NPError
 173 Private_New(NPMIMEType pluginType, NPP instance, uint16 mode,
 174                 int16 argc, char* argn[], char* argv[], NPSavedData* saved)
 175 {
 176         NPError ret;
 177         PLUGINDEBUGSTR("New");
 178         ret = NPP_New(pluginType, instance, mode, argc, argn, argv, saved);
 179         return ret;
 180 }
 181
 182 NPError
 183 Private_Destroy(NPP instance, NPSavedData** save)
 184 {
 185         PLUGINDEBUGSTR("Destroy");
 186         return NPP_Destroy(instance, save);
 187 }
 188
 189 NPError
 190 Private_SetWindow(NPP instance, NPWindow* window)
 191 {
 192         NPError err;
 193         PLUGINDEBUGSTR("SetWindow");
 194         err = NPP_SetWindow(instance, window);
 195         return err;
 196 }
 197
 198 NPError
 199 Private_NewStream(NPP instance, NPMIMEType type, NPStream* stream,
 200                         NPBool seekable, uint16* stype)
 201 {
 202         NPError err;
 203         PLUGINDEBUGSTR("NewStream");
 204         err = NPP_NewStream(instance, type, stream, seekable, stype);
 205         return err;
 206 }
 207
 208 int32
 209 Private_WriteReady(NPP instance, NPStream* stream)
 210 {
 211         unsigned int result;
 212         PLUGINDEBUGSTR("WriteReady");
 213         result = NPP_WriteReady(instance, stream);
 214         return result;
 215 }
 216
 217 int32
 218 Private_Write(NPP instance, NPStream* stream, int32 offset, int32 len,
 219                 void* buffer)
 220 {
 221         unsigned int result;
 222         PLUGINDEBUGSTR("Write");
 223         result = NPP_Write(instance, stream, offset, len, buffer);
 224         return result;
 225 }
 226
 227 void
 228 Private_StreamAsFile(NPP instance, NPStream* stream, const char* fname)
 229 {
 230         PLUGINDEBUGSTR("StreamAsFile");
 231         NPP_StreamAsFile(instance, stream, fname);
 232 }
 233
 234
 235 NPError
 236 Private_DestroyStream(NPP instance, NPStream* stream, NPError reason)
 237 {
 238         NPError err;
 239         PLUGINDEBUGSTR("DestroyStream");
 240         err = NPP_DestroyStream(instance, stream, reason);
 241         return err;
 242 }
 243
 244
 245 void
 246 Private_Print(NPP instance, NPPrint* platformPrint)
 247 {
 248         PLUGINDEBUGSTR("Print");
 249         NPP_Print(instance, platformPrint);
 250 }
 251
 252 JRIGlobalRef
 253 Private_GetJavaClass(void)
 254 {
 255     jref clazz = NPP_GetJavaClass();
 256     if (clazz) {
 257         JRIEnv* env = NPN_GetJavaEnv();
 258         return JRI_NewGlobalRef(env, clazz);
 259     }
 260     return NULL;
 261 }
 262
 263 /***********************************************************************
 264  *
 265  * These functions are located automagically by netscape.
 266  *
 267  ***********************************************************************/
 268
 269 /*
 270  * NP_GetMIMEDescription
 271  *      - Netscape needs to know about this symbol
 272  *      - Netscape uses the return value to identify when an object instance
 273  *        of this plugin should be created.
 274  */
 275 char *
 276 NP_GetMIMEDescription(void)
 277 {
 278         return NPP_GetMIMEDescription();
 279 }
 280
 281 /*
 282  * NP_GetValue [optional]
 283  *      - Netscape needs to know about this symbol.
 284  *      - Interfaces with plugin to get values for predefined variables
 285  *        that the navigator needs.
 286  */
 287 NPError
 288 NP_GetValue(void *future, NPPVariable variable, void *value)
 289 {
 290         return NPP_GetValue(future, variable, value);
 291 }
 292
 293 /*
 294  * NP_Initialize
 295  *      - Netscape needs to know about this symbol.
 296  *      - It calls this function after looking up its symbol before it
 297  *        is about to create the first ever object of this kind.
 298  *
 299  * PARAMETERS
 300  *    nsTable   - The netscape function table. If developers just use these
 301  *                wrappers, they dont need to worry about all these function
 302  *                tables.
 303  * RETURN
 304  *    pluginFuncs
 305  *              - This functions needs to fill the plugin function table
 306  *                pluginFuncs and return it. Netscape Navigator plugin
 307  *                library will use this function table to call the plugin.
 308  *
 309  */
 310 NPError
 311 NP_Initialize(NPNetscapeFuncs* nsTable, NPPluginFuncs* pluginFuncs)
 312 {
 313         NPError err = NPERR_NO_ERROR;
 314
 315         PLUGINDEBUGSTR("NP_Initialize");
 316
 317         /* validate input parameters */
 318
 319         if ((nsTable == NULL) || (pluginFuncs == NULL))
 320                 err = NPERR_INVALID_FUNCTABLE_ERROR;
 321
 322         /*
 323          * Check the major version passed in Netscape's function table.
 324          * We won't load if the major version is newer than what we expect.
 325          * Also check that the function tables passed in are big enough for
 326          * all the functions we need (they could be bigger, if Netscape added
 327          * new APIs, but that's OK with us -- we'll just ignore them).
 328          *
 329          */
 330
 331         if (err == NPERR_NO_ERROR) {
 332                 if ((nsTable->version >> 8) > NP_VERSION_MAJOR)
 333                         err = NPERR_INCOMPATIBLE_VERSION_ERROR;
 334                 if (nsTable->size < sizeof(NPNetscapeFuncs))
 335                         err = NPERR_INVALID_FUNCTABLE_ERROR;
 336                 if (pluginFuncs->size < sizeof(NPPluginFuncs))
 337                         err = NPERR_INVALID_FUNCTABLE_ERROR;
 338         }
 339
 340
 341         if (err == NPERR_NO_ERROR) {
 342                 /*
 343                  * Copy all the fields of Netscape function table into our
 344                  * copy so we can call back into Netscape later.  Note that
 345                  * we need to copy the fields one by one, rather than assigning
 346                  * the whole structure, because the Netscape function table
 347                  * could actually be bigger than what we expect.
 348                  */
 349                 gNetscapeFuncs.version       = nsTable->version;
 350                 gNetscapeFuncs.size          = nsTable->size;
 351                 gNetscapeFuncs.posturl       = nsTable->posturl;
 352                 gNetscapeFuncs.geturl        = nsTable->geturl;
 353                 gNetscapeFuncs.requestread   = nsTable->requestread;
 354                 gNetscapeFuncs.newstream     = nsTable->newstream;
 355                 gNetscapeFuncs.write         = nsTable->write;
 356                 gNetscapeFuncs.destroystream = nsTable->destroystream;
 357                 gNetscapeFuncs.status        = nsTable->status;
 358                 gNetscapeFuncs.uagent        = nsTable->uagent;
 359                 gNetscapeFuncs.memalloc      = nsTable->memalloc;
 360                 gNetscapeFuncs.memfree       = nsTable->memfree;
 361                 gNetscapeFuncs.memflush      = nsTable->memflush;
 362                 gNetscapeFuncs.reloadplugins = nsTable->reloadplugins;
 363                 gNetscapeFuncs.getJavaEnv    = nsTable->getJavaEnv;
 364                 gNetscapeFuncs.getJavaPeer   = nsTable->getJavaPeer;
 365                 gNetscapeFuncs.getvalue      = nsTable->getvalue;
 366
 367                 /*
 368                  * Set up the plugin function table that Netscape will use to
 369                  * call us.  Netscape needs to know about our version and size
 370                  * and have a UniversalProcPointer for every function we
 371                  * implement.
 372                  */
 373                 pluginFuncs->version    = (NP_VERSION_MAJOR << 8) + NP_VERSION_MINOR;
 374                 pluginFuncs->size       = sizeof(NPPluginFuncs);
 375                 pluginFuncs->newp       = NewNPP_NewProc(Private_New);
 376                 pluginFuncs->destroy    = NewNPP_DestroyProc(Private_Destroy);
 377                 pluginFuncs->setwindow  = NewNPP_SetWindowProc(Private_SetWindow);
 378                 pluginFuncs->newstream  = NewNPP_NewStreamProc(Private_NewStream);
 379                 pluginFuncs->destroystream = NewNPP_DestroyStreamProc(Private_DestroyStream);
 380                 pluginFuncs->asfile     = NewNPP_StreamAsFileProc(Private_StreamAsFile);
 381                 pluginFuncs->writeready = NewNPP_WriteReadyProc(Private_WriteReady);
 382                 pluginFuncs->write      = NewNPP_WriteProc(Private_Write);
 383                 pluginFuncs->print      = NewNPP_PrintProc(Private_Print);
 384                 pluginFuncs->event      = NULL;
 385                 pluginFuncs->javaClass  = Private_GetJavaClass();
 386
 387                 err = NPP_Initialize();
 388         }
 389
 390         return err;
 391 }
 392
 393 /*
 394  * NP_Shutdown [optional]
 395  *      - Netscape needs to know about this symbol.
 396  *      - It calls this function after looking up its symbol after
 397  *        the last object of this kind has been destroyed.
 398  *
 399  */
 400 NPError
 401 NP_Shutdown(void)
 402 {
 403         PLUGINDEBUGSTR("NP_Shutdown");
 404         NPP_Shutdown();
 405         return NPERR_NO_ERROR;
 406 }