dlls/twain/ds_ctrl.c

   1 /*
   2  * Copyright 2000 Corel Corporation
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include "config.h"
  20
  21 #ifdef HAVE_UNISTD_H
  22 # include <unistd.h>
  23 #endif
  24 #include <stdlib.h>
  25 #include "twain.h"
  26 #include "twain_i.h"
  27 #include "wine/debug.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(twain);
  30
  31 /* DG_CONTROL/DAT_CAPABILITY/MSG_GET */
  32 TW_UINT16 TWAIN_CapabilityGet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
  33                                TW_MEMREF pData)
  34 {
  35     TW_UINT16 twRC = TWRC_SUCCESS, twCC = TWCC_SUCCESS;
  36     pTW_CAPABILITY pCapability = (pTW_CAPABILITY) pData;
  37     activeDS *pSource = TWAIN_LookupSource (pDest);
  38
  39     TRACE("DG_CONTROL/DAT_CAPABILITY/MSG_GET\n");
  40
  41     if (!pDest)
  42     {
  43         twRC = TWRC_FAILURE;
  44         DSM_twCC = TWCC_BADDEST;
  45     }
  46     else if (pSource->currentState < 4 || pSource->currentState > 7)
  47     {
  48         twRC = TWRC_FAILURE;
  49         pSource->twCC = TWCC_SEQERROR;
  50     }
  51     else
  52     {
  53         twCC = TWAIN_SaneCapability (pSource, pCapability, MSG_GET);
  54         twRC = (twCC == TWCC_SUCCESS)?TWRC_SUCCESS:TWRC_FAILURE;
  55         pSource->twCC = twCC;
  56     }
  57
  58     return twRC;
  59 }
  60
  61 /* DG_CONTROL/DAT_CAPABILITY/MSG_GETCURRENT */
  62 TW_UINT16 TWAIN_CapabilityGetCurrent (pTW_IDENTITY pOrigin,
  63                                       pTW_IDENTITY pDest,TW_MEMREF pData)
  64 {
  65     TW_UINT16 twRC = TWRC_SUCCESS, twCC = TWCC_SUCCESS;
  66     pTW_CAPABILITY pCapability = (pTW_CAPABILITY) pData;
  67     activeDS *pSource = TWAIN_LookupSource (pDest);
  68
  69     TRACE("DG_CONTROL/DAT_CAPABILITY/MSG_GETCURRENT\n");
  70
  71     if (!pSource)
  72     {
  73         twRC = TWRC_FAILURE;
  74         DSM_twCC = TWCC_BADDEST;
  75     }
  76     else if (pSource->currentState < 4 || pSource->currentState > 7)
  77     {
  78         twRC = TWRC_FAILURE;
  79         pSource->twCC = TWCC_SEQERROR;
  80     }
  81     else
  82     {
  83         twCC = TWAIN_SaneCapability (pSource, pCapability, MSG_GETCURRENT);
  84         twRC = (twCC == TWCC_SUCCESS)?TWRC_SUCCESS:TWRC_FAILURE;
  85         pSource->twCC = twCC;
  86     }
  87
  88     return twRC;
  89 }
  90
  91 /* DG_CONTROL/DAT_CAPABILITY/MSG_GETDEFAULT */
  92 TW_UINT16 TWAIN_CapabilityGetDefault (pTW_IDENTITY pOrigin,
  93                                       pTW_IDENTITY pDest, TW_MEMREF pData)
  94 {
  95     TW_UINT16 twRC = TWRC_SUCCESS, twCC = TWCC_SUCCESS;
  96     pTW_CAPABILITY pCapability = (pTW_CAPABILITY) pData;
  97     activeDS *pSource = TWAIN_LookupSource (pDest);
  98
  99     TRACE("DG_CONTROL/DAT_CAPABILITY/MSG_GETDEFAULT\n");
 100
 101     if (!pDest)
 102     {
 103         twRC = TWRC_FAILURE;
 104         DSM_twCC = TWCC_BADDEST;
 105     }
 106     else if (pSource->currentState < 4 || pSource->currentState > 7)
 107     {
 108         twRC = TWRC_FAILURE;
 109         pSource->twCC = TWCC_SEQERROR;
 110     }
 111     else
 112     {
 113         twCC = TWAIN_SaneCapability (pSource, pCapability, MSG_GETDEFAULT);
 114         twRC = (twCC == TWCC_SUCCESS)?TWRC_SUCCESS:TWRC_FAILURE;
 115         pSource->twCC = twCC;
 116     }
 117
 118     return twRC;
 119 }
 120
 121 /* DG_CONTROL/DAT_CAPABILITY/MSG_QUERYSUPPORT */
 122 TW_UINT16 TWAIN_CapabilityQuerySupport (pTW_IDENTITY pOrigin,
 123                                         pTW_IDENTITY pDest, TW_MEMREF pData)
 124 {
 125     FIXME ("stub!\n");
 126
 127     return TWRC_FAILURE;
 128 }
 129
 130 /* DG_CONTROL/DAT_CAPABILITY/MSG_RESET */
 131 TW_UINT16 TWAIN_CapabilityReset (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 132                                  TW_MEMREF pData)
 133 {
 134     TW_UINT16 twRC = TWRC_SUCCESS, twCC = TWCC_SUCCESS;
 135     pTW_CAPABILITY pCapability = (pTW_CAPABILITY) pData;
 136     activeDS *pSource = TWAIN_LookupSource (pDest);
 137
 138     TRACE("DG_CONTROL/DAT_CAPABILITY/MSG_RESET\n");
 139
 140     if (!pDest)
 141     {
 142         twRC = TWRC_FAILURE;
 143         DSM_twCC = TWCC_BADDEST;
 144     }
 145     else if (pSource->currentState < 4 || pSource->currentState > 7)
 146     {
 147         twRC = TWRC_FAILURE;
 148         pSource->twCC = TWCC_SEQERROR;
 149     }
 150     else
 151     {
 152         twCC = TWAIN_SaneCapability (pSource, pCapability, MSG_RESET);
 153         twRC = (twCC == TWCC_SUCCESS)?TWRC_SUCCESS:TWRC_FAILURE;
 154         pSource->twCC = twCC;
 155     }
 156
 157     return twRC;
 158 }
 159
 160 /* DG_CONTROL/DAT_CAPABILITY/MSG_SET */
 161 TW_UINT16 TWAIN_CapabilitySet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 162                                TW_MEMREF pData)
 163 {
 164     TW_UINT16 twRC = TWRC_SUCCESS, twCC = TWCC_SUCCESS;
 165     pTW_CAPABILITY pCapability = (pTW_CAPABILITY) pData;
 166     activeDS *pSource = TWAIN_LookupSource (pDest);
 167
 168     TRACE ("DG_CONTROL/DAT_CAPABILITY/MSG_SET\n");
 169
 170     if (!pSource)
 171     {
 172         twRC = TWRC_FAILURE;
 173         DSM_twCC = TWCC_BADDEST;
 174     }
 175     else if (pSource->currentState != 4)
 176     {
 177         twRC = TWRC_FAILURE;
 178         pSource->twCC = TWCC_SEQERROR;
 179     }
 180     else
 181     {
 182         twCC = TWAIN_SaneCapability (pSource, pCapability, MSG_SET);
 183         twRC = (twCC == TWCC_SUCCESS)?TWRC_SUCCESS:TWRC_FAILURE;
 184         pSource->twCC = twCC;
 185     }
 186     return twRC;
 187 }
 188
 189 /* DG_CONTROL/DAT_CUSTOMDSDATA/MSG_GET */
 190 TW_UINT16 TWAIN_CustomDSDataGet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 191                                 TW_MEMREF pData)
 192 {
 193     FIXME ("stub!\n");
 194
 195     return TWRC_FAILURE;
 196 }
 197
 198 /* DG_CONTROL/DAT_CUSTOMDSDATA/MSG_SET */
 199 TW_UINT16 TWAIN_CustomDSDataSet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 200                                  TW_MEMREF pData)
 201 {
 202     FIXME ("stub!\n");
 203
 204     return TWRC_FAILURE;
 205 }
 206
 207 /* DG_CONTROL/DAT_FILESYSTEM/MSG_AUTOMATICCAPTUREDIRECTORY */
 208 TW_UINT16 TWAIN_AutomaticCaptureDirectory (pTW_IDENTITY pOrigin,
 209                                            pTW_IDENTITY pDest,
 210                                            TW_MEMREF pData)
 211 {
 212     FIXME ("stub!\n");
 213
 214     return TWRC_FAILURE;
 215 }
 216
 217 /* DG_CONTROL/DAT_FILESYSTEM/MSG_CHANGEDIRECTORY */
 218 TW_UINT16 TWAIN_ChangeDirectory (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 219                                  TW_MEMREF pData)
 220 {
 221     FIXME ("stub!\n");
 222
 223     return TWRC_FAILURE;
 224 }
 225
 226 /* DG_CONTROL/DAT_FILESYSTEM/MSG_COPY */
 227 TW_UINT16 TWAIN_FileSystemCopy (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 228                                 TW_MEMREF pData)
 229 {
 230     FIXME ("stub!\n");
 231
 232     return TWRC_FAILURE;
 233 }
 234
 235 /* DG_CONTROL/DAT_FILESYSTEM/MSG_CREATEDIRECTORY */
 236 TW_UINT16 TWAIN_CreateDirectory (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 237                                  TW_MEMREF pData)
 238 {
 239     FIXME ("stub!\n");
 240
 241     return TWRC_FAILURE;
 242 }
 243
 244 /* DG_CONTROL/DAT_FILESYSTEM/MSG_DELETE */
 245 TW_UINT16 TWAIN_FileSystemDelete (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 246                                   TW_MEMREF pData)
 247 {
 248     FIXME ("stub!\n");
 249
 250     return TWRC_FAILURE;
 251 }
 252
 253 /* DG_CONTROL/DAT_FILESYSTEM/MSG_FORMATMEDIA */
 254 TW_UINT16 TWAIN_FormatMedia (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 255                              TW_MEMREF pData)
 256 {
 257     FIXME ("stub!\n");
 258
 259     return TWRC_FAILURE;
 260 }
 261
 262 /* DG_CONTROL/DAT_FILESYSTEM/MSG_GETCLOSE */
 263 TW_UINT16 TWAIN_FileSystemGetClose (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 264                                     TW_MEMREF pData)
 265 {
 266     FIXME ("stub!\n");
 267
 268     return TWRC_FAILURE;
 269 }
 270
 271 /* DG_CONTROL/DAT_FILESYSTEM/MSG_GETFIRSTFILE */
 272 TW_UINT16 TWAIN_FileSystemGetFirstFile (pTW_IDENTITY pOrigin,
 273                                         pTW_IDENTITY pDest,
 274                                         TW_MEMREF pData)
 275 {
 276     FIXME ("stub!\n");
 277
 278     return TWRC_FAILURE;
 279 }
 280
 281 /* DG_CONTROL/DAT_FILESYSTEM/MSG_GETINFO */
 282 TW_UINT16 TWAIN_FileSystemGetInfo (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 283                                    TW_MEMREF pData)
 284 {
 285     FIXME ("stub!\n");
 286
 287     return TWRC_FAILURE;
 288 }
 289
 290 /* DG_CONTROL/DAT_FILESYSTEM/MSG_GETNEXTFILE */
 291 TW_UINT16 TWAIN_FileSystemGetNextFile (pTW_IDENTITY pOrigin,
 292                                        pTW_IDENTITY pDest,
 293                                        TW_MEMREF pData)
 294 {
 295     FIXME ("stub!\n");
 296
 297     return TWRC_FAILURE;
 298 }
 299
 300 /* DG_CONTROL/DAT_FILESYSTEM/MSG_RENAME */
 301 TW_UINT16 TWAIN_FileSystemRename (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 302                                   TW_MEMREF pData)
 303 {
 304     FIXME ("stub!\n");
 305
 306     return TWRC_FAILURE;
 307 }
 308
 309 /* DG_CONTROL/DAT_EVENT/MSG_PROCESSEVENT */
 310 TW_UINT16 TWAIN_ProcessEvent (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 311                               TW_MEMREF pData)
 312 {
 313     TW_UINT16 twRC = TWRC_SUCCESS;
 314     pTW_EVENT pEvent = (pTW_EVENT) pData;
 315     activeDS *pSource = TWAIN_LookupSource (pDest);
 316
 317     TRACE("DG_CONTROL/DAT_EVENT/MSG_PROCESSEVENT\n");
 318
 319     if (!pSource)
 320     {
 321          twRC = TWRC_FAILURE;
 322          DSM_twCC = TWCC_BADDEST;
 323     }
 324     else if (pSource->currentState < 5 || pSource->currentState > 7)
 325     {
 326         twRC = TWRC_FAILURE;
 327         pSource->twCC = TWCC_SEQERROR;
 328     }
 329     else
 330     {
 331         if (pSource->pendingEvent.TWMessage != MSG_NULL)
 332         {
 333             pEvent->TWMessage = pSource->pendingEvent.TWMessage;
 334             pSource->pendingEvent.TWMessage = MSG_NULL;
 335             twRC = TWRC_DSEVENT;
 336         }
 337         else
 338         {
 339             pEvent->TWMessage = MSG_NULL;  /* no message to the application */
 340             twRC = TWRC_NOTDSEVENT;
 341         }
 342         pSource->twCC = TWCC_SUCCESS;
 343     }
 344
 345     return twRC;
 346 }
 347
 348 /* DG_CONTROL/DAT_PASSTHRU/MSG_PASSTHRU */
 349 TW_UINT16 TWAIN_PassThrough (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 350                              TW_MEMREF pData)
 351 {
 352     FIXME ("stub!\n");
 353
 354     return TWRC_FAILURE;
 355 }
 356
 357 /* DG_CONTROL/DAT_PENDINGXFERS/MSG_ENDXFER */
 358 TW_UINT16 TWAIN_PendingXfersEndXfer (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 359                                      TW_MEMREF pData)
 360 {
 361     TW_UINT16 twRC = TWRC_SUCCESS;
 362     pTW_PENDINGXFERS pPendingXfers = (pTW_PENDINGXFERS) pData;
 363     activeDS *pSource = TWAIN_LookupSource (pData);
 364
 365     TRACE("DG_CONTROL/DAT_PENDINGXFERS/MSG_ENDXFER\n");
 366
 367     if (!pSource)
 368     {
 369         twRC = TWRC_FAILURE;
 370         DSM_twCC = TWCC_BADDEST;
 371     }
 372     else if (pSource->currentState != 6 && pSource->currentState != 7)
 373     {
 374         twRC = TWRC_FAILURE;
 375         pSource->twCC = TWCC_SEQERROR;
 376     }
 377     else
 378     {
 379         if (pPendingXfers->Count != 0)
 380         {
 381             pPendingXfers->Count --;
 382             pSource->currentState = 6;
 383         }
 384         else
 385         {
 386             pSource->currentState = 5;
 387             /* Notify the application that it can close the data source */
 388             pSource->pendingEvent.TWMessage = MSG_CLOSEDSREQ;
 389         }
 390         twRC = TWRC_SUCCESS;
 391         pSource->twCC = TWCC_SUCCESS;
 392     }
 393
 394     return twRC;
 395 }
 396
 397 /* DG_CONTROL/DAT_PENDINGXFERS/MSG_GET */
 398 TW_UINT16 TWAIN_PendingXfersGet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 399                                  TW_MEMREF pData)
 400 {
 401     TW_UINT16 twRC = TWRC_SUCCESS;
 402     pTW_PENDINGXFERS pPendingXfers = (pTW_PENDINGXFERS) pData;
 403     activeDS *pSource = TWAIN_LookupSource (pDest);
 404
 405     TRACE("DG_CONTROL/DAT_PENDINGXFERS/MSG_GET\n");
 406
 407     if (!pSource)
 408     {
 409         twRC = TWRC_FAILURE;
 410         DSM_twCC = TWCC_BADDEST;
 411     }
 412     else if (pSource->currentState < 4 || pSource->currentState > 7)
 413     {
 414         twRC = TWRC_FAILURE;
 415         DSM_twCC = TWCC_SEQERROR;
 416     }
 417     else
 418     {
 419         /* FIXME: we shouldn't return 1 here */
 420         pPendingXfers->Count = 1;
 421         twRC = TWRC_SUCCESS;
 422         pSource->twCC = TWCC_SUCCESS;
 423     }
 424
 425     return twRC;
 426 }
 427
 428 /* DG_CONTROL/DAT_PENDINGXFERS/MSG_RESET */
 429 TW_UINT16 TWAIN_PendingXfersReset (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 430                                    TW_MEMREF pData)
 431 {
 432     TW_UINT16 twRC = TWRC_SUCCESS;
 433     pTW_PENDINGXFERS pPendingXfers = (pTW_PENDINGXFERS) pData;
 434     activeDS *pSource = TWAIN_LookupSource (pDest);
 435
 436     TRACE("DG_CONTROL/DAT_PENDINGXFERS/MSG_RESET\n");
 437
 438     if (!pSource)
 439     {
 440         twRC = TWRC_FAILURE;
 441         DSM_twCC = TWCC_BADDEST;
 442     }
 443     else if (pSource->currentState != 6)
 444     {
 445         twRC = TWRC_FAILURE;
 446         DSM_twCC = TWCC_SEQERROR;
 447     }
 448     else
 449     {
 450         pPendingXfers->Count = 0;
 451         pSource->currentState = 5;
 452         twRC = TWRC_SUCCESS;
 453         pSource->twCC = TWCC_SUCCESS;
 454     }
 455
 456     return twRC;
 457 }
 458
 459 /* DG_CONTROL/DAT_PENDINGXFERS/MSG_STOPFEEDER */
 460 TW_UINT16 TWAIN_PendingXfersStopFeeder (pTW_IDENTITY pOrigin,
 461                                         pTW_IDENTITY pDest, TW_MEMREF pData)
 462 {
 463     FIXME ("stub!\n");
 464
 465     return TWRC_FAILURE;
 466 }
 467
 468 /* DG_CONTROL/DAT_SETUPFILEXFER/MSG_GET */
 469 TW_UINT16 TWAIN_SetupFileXferGet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 470                                   TW_MEMREF pData)
 471 {
 472     FIXME ("stub!\n");
 473
 474     return TWRC_FAILURE;
 475 }
 476
 477 /* DG_CONTROL/DAT_SETUPXFER/MSG_GETDEFAULT */
 478 TW_UINT16 TWAIN_SetupFileXferGetDefault (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 479                                          TW_MEMREF pData)
 480 {
 481     FIXME ("stub!\n");
 482
 483     return TWRC_FAILURE;
 484 }
 485
 486
 487 /* DG_CONTROL/DAT_SETUPFILEXFER/MSG_RESET */
 488 TW_UINT16 TWAIN_SetupFileXferReset (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 489                                     TW_MEMREF pData)
 490 {
 491     FIXME ("stub!\n");
 492
 493     return TWRC_FAILURE;
 494 }
 495
 496 /* DG_CONTROL/DAT_SETUPFILEXFER/MSG_SET */
 497 TW_UINT16 TWAIN_SetupFileXferSet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 498                                   TW_MEMREF pData)
 499 {
 500     FIXME ("stub!\n");
 501
 502     return TWRC_FAILURE;
 503 }
 504
 505 /* DG_CONTROL/DAT_SETUPFILEXFER2/MSG_GET */
 506 TW_UINT16 TWAIN_SetupFileXfer2Get (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 507                                    TW_MEMREF pData)
 508 {
 509     FIXME ("stub!\n");
 510
 511     return TWRC_FAILURE;
 512 }
 513
 514 /* DG_CONTROL/DAT_SETUPFILEXFER2/MSG_GETDEFAULT */
 515 TW_UINT16 TWAIN_SetupFileXfer2GetDefault (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 516                                          TW_MEMREF pData)
 517 {
 518     FIXME ("stub!\n");
 519
 520     return TWRC_FAILURE;
 521 }
 522
 523 /* DG_CONTROL/DAT_SETUPFILEXFER2/MSG_RESET */
 524 TW_UINT16 TWAIN_SetupFileXfer2Reset (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 525                                   TW_MEMREF pData)
 526 {
 527     FIXME ("stub!\n");
 528
 529     return TWRC_FAILURE;
 530 }
 531
 532 /* DG_CONTROL/DAT_SETUPFILEXFER2/MSG_SET */
 533 TW_UINT16 TWAIN_SetupFileXfer2Set (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 534                                   TW_MEMREF pData)
 535 {
 536     FIXME ("stub!\n");
 537
 538     return TWRC_FAILURE;
 539 }
 540
 541 /* DG_CONTROL/DAT_SETUPMEMXFER/MSG_GET */
 542 TW_UINT16 TWAIN_SetupMemXferGet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 543                                   TW_MEMREF pData)
 544 {
 545     FIXME ("stub!\n");
 546
 547     return TWRC_FAILURE;
 548 }
 549
 550 /* DG_CONTROL/DAT_STATUS/MSG_GET */
 551 TW_UINT16 TWAIN_GetDSStatus (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 552                              TW_MEMREF pData)
 553 {
 554     TW_UINT16 twRC = TWRC_FAILURE;
 555     pTW_STATUS pSourceStatus = (pTW_STATUS) pData;
 556     activeDS *pSource = TWAIN_LookupSource (pDest);
 557
 558     TRACE ("DG_CONTROL/DAT_STATUS/MSG_GET\n");
 559
 560     if (!pSource)
 561     {
 562         twRC = TWRC_FAILURE;
 563         DSM_twCC = TWCC_BADDEST;
 564         pSourceStatus->ConditionCode = TWCC_BADDEST;
 565     }
 566     else
 567     {
 568         twRC = TWRC_SUCCESS;
 569         pSourceStatus->ConditionCode = pSource->twCC;
 570         /* Reset the condition code */
 571         pSource->twCC = TWCC_SUCCESS;
 572     }
 573
 574     return twRC;
 575 }
 576
 577 /* DG_CONTROL/DAT_USERINTERFACE/MSG_DISABLEDS */
 578 TW_UINT16 TWAIN_DisableDSUserInterface (pTW_IDENTITY pOrigin,
 579                                         pTW_IDENTITY pDest, TW_MEMREF pData)
 580 {
 581     TW_UINT16 twRC = TWRC_SUCCESS;
 582     activeDS *pSource = TWAIN_LookupSource (pDest);
 583
 584     TRACE ("DG_CONTROL/DAT_USERINTERFACE/MSG_DISABLEDS\n");
 585
 586     if (!pSource)
 587     {
 588         twRC = TWRC_FAILURE;
 589         DSM_twCC = TWCC_BADDEST;
 590     }
 591     else if (pSource->currentState != 5)
 592     {
 593         twRC = TWRC_FAILURE;
 594         pSource->twCC = TWCC_SEQERROR;
 595     }
 596     else
 597     {
 598         pSource->currentState = 4;
 599         twRC = TWRC_SUCCESS;
 600         pSource->twCC = TWCC_SUCCESS;
 601     }
 602
 603     return twRC;
 604 }
 605
 606 /* DG_CONTROL/DAT_USERINTERFACE/MSG_ENABLEDS */
 607 TW_UINT16 TWAIN_EnableDSUserInterface (pTW_IDENTITY pOrigin,
 608                                        pTW_IDENTITY pDest, TW_MEMREF pData)
 609 {
 610     TW_UINT16 twRC = TWRC_SUCCESS;
 611     pTW_USERINTERFACE pUserInterface = (pTW_USERINTERFACE) pData;
 612     activeDS *pSource = TWAIN_LookupSource (pDest);
 613
 614     TRACE ("DG_CONTROL/DAT_USERINTERFACE/MSG_ENABLEDS\n");
 615
 616     if (!pSource)
 617     {
 618         twRC = TWRC_FAILURE;
 619         DSM_twCC = TWCC_BADDEST;
 620     }
 621     else if (pSource->currentState != 4)
 622     {
 623         twRC = TWRC_FAILURE;
 624         pSource->twCC = TWCC_SEQERROR;
 625     }
 626     else
 627     {
 628         if (pUserInterface->ShowUI)
 629         {
 630             pSource->currentState = 5; /* Transitions to state 5 */
 631             /* FIXME: we should replace xscanimage with our own device UI */
 632             system ("xscanimage");
 633             pSource->currentState = 6;
 634             pSource->pendingEvent.TWMessage = MSG_XFERREADY;
 635         }
 636         else
 637         {
 638             /* no UI will be displayed, so source is ready to transfer data */
 639             pSource->pendingEvent.TWMessage = MSG_XFERREADY;
 640             pSource->currentState = 6; /* Transitions to state 6 directly */
 641         }
 642
 643         pSource->hwndOwner = pUserInterface->hParent;
 644         twRC = TWRC_SUCCESS;
 645         pSource->twCC = TWCC_SUCCESS;
 646     }
 647
 648     return twRC;
 649 }
 650
 651 /* DG_CONTROL/DAT_USERINTERFACE/MSG_ENABLEDSUIONLY */
 652 TW_UINT16 TWAIN_EnableDSUIOnly (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 653                                 TW_MEMREF pData)
 654 {
 655     TW_UINT16 twRC = TWRC_SUCCESS;
 656     activeDS *pSource = TWAIN_LookupSource (pDest);
 657
 658     TRACE("DG_CONTROL/DAT_USERINTERFACE/MSG_ENABLEDSUIONLY\n");
 659
 660     if (!pSource)
 661     {
 662         twRC = TWRC_FAILURE;
 663         DSM_twCC = TWCC_BADDEST;
 664     }
 665     else if (pSource->currentState != 4)
 666     {
 667         twRC = TWRC_FAILURE;
 668         pSource->twCC = TWCC_SEQERROR;
 669     }
 670     else
 671     {
 672         /* FIXME: we should replace xscanimage with our own UI */
 673         system ("xscanimage");
 674         pSource->currentState = 5;
 675         twRC = TWRC_SUCCESS;
 676         pSource->twCC = TWCC_SUCCESS;
 677     }
 678
 679     return twRC;
 680 }
 681
 682 /* DG_CONTROL/DAT_XFERGROUP/MSG_GET */
 683 TW_UINT16 TWAIN_XferGroupGet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 684                               TW_MEMREF pData)
 685 {
 686     FIXME ("stub!\n");
 687
 688     return TWRC_FAILURE;
 689 }
 690
 691 /* DG_CONTROL/DAT_XFERGROUP/MSG_SET */
 692 TW_UINT16 TWAIN_XferGroupSet (pTW_IDENTITY pOrigin, pTW_IDENTITY pDest,
 693                                   TW_MEMREF pData)
 694 {
 695     FIXME ("stub!\n");
 696
 697     return TWRC_FAILURE;
 698 }