/* $Header: /home/cvsroot/dvipdfmx/src/specials.c,v 1.10 2008/05/24 08:37:49 chofchof Exp $ This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks. Copyright (C) 2002 by Jin-Hwan Cho and Shunsaku Hirata, the dvipdfmx project team Copyright (C) 1998, 1999 by Mark A. Wicks This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #if HAVE_CONFIG_H #include "config.h" #endif #include #include "system.h" #include "mem.h" #include "error.h" #include "numbers.h" #include "dvi.h" #include "pdfobj.h" #include "pdfparse.h" #include "pdfdoc.h" #include "pdfnames.h" #include "pdfdraw.h" #include "pdfdev.h" #include "spc_pdfm.h" #include "spc_tpic.h" #include "spc_html.h" #include "spc_misc.h" #include "spc_color.h" #include "spc_dvips.h" #include "spc_xtx.h" #include "specials.h" static int verbose = 0; void spc_set_verbose (void) { verbose++; } void spc_warn (struct spc_env *spe, const char *fmt, ...) { va_list ap; static char buf[1024]; va_start(ap, fmt); vsprintf(buf, fmt, ap); WARN(buf); va_end(ap); return; } /* This is currently just to make other spc_xxx to not directly * call dvi_xxx. */ int spc_begin_annot (struct spc_env *spe, pdf_obj *dict) { pdf_doc_begin_annot(dict); dvi_tag_depth(); /* Tell dvi interpreter to handle line-break. */ return 0; } int spc_end_annot (struct spc_env *spe) { dvi_untag_depth(); pdf_doc_end_annot(); return 0; } int spc_resume_annot (struct spc_env *spe) { dvi_link_annot(1); return 0; } int spc_suspend_annot (struct spc_env *spe) { dvi_link_annot(0); return 0; } static struct ht_table *named_objects = NULL; /* reserved keys */ static const char *_rkeys[] = { #define K_OBJ__XPOS 0 #define K_OBJ__YPOS 1 "xpos", "ypos", #define K_OBJ__THISPAGE 2 #define K_OBJ__PREVPAGE 3 #define K_OBJ__NEXTPAGE 4 "thispage", "prevpage", "nextpage", #define K_OBJ__RESOURCES 5 "resources", #define K_OBJ__PAGES 6 #define K_OBJ__NAMES 7 "pages", "names", #define K_OBJ__CATALOG 8 #define K_OBJ__DOCINFO 9 "catalog", "docinfo", #if 0 #define K_OBJ__TRAILER 10 "trailer", #endif /* NYI */ NULL }; /* pageN where N is a positive integer. * Note that page need not exist at this time. */ static int ispageref (const char *key) { const char *p; if (strlen(key) <= strlen("page") || memcmp(key, "page", strlen("page"))) return 0; else { for (p = key + 4; *p && *p >= '0' && *p <= '9'; p++); if (*p != '\0') return 0; } return 1; } /* * The following routine returns copies, not the original object. */ pdf_obj * spc_lookup_reference (const char *key) { pdf_obj *value = NULL; pdf_coord cp; int k; ASSERT(named_objects); if (!key) return NULL; for (k = 0; _rkeys[k] && strcmp(key, _rkeys[k]); k++); switch (k) { /* xpos and ypos must be position in device space here. */ case K_OBJ__XPOS: cp.x = dvi_dev_xpos(); cp.y = 0.0; pdf_dev_transform(&cp, NULL); value = pdf_new_number(ROUND(cp.x, .01)); break; case K_OBJ__YPOS: cp.x = 0.0; cp.y = dvi_dev_ypos(); pdf_dev_transform(&cp, NULL); value = pdf_new_number(ROUND(cp.y, .01)); break; case K_OBJ__THISPAGE: value = pdf_doc_this_page_ref(); break; case K_OBJ__PREVPAGE: value = pdf_doc_prev_page_ref(); break; case K_OBJ__NEXTPAGE: value = pdf_doc_next_page_ref(); break; case K_OBJ__PAGES: value = pdf_ref_obj(pdf_doc_page_tree()); break; case K_OBJ__NAMES: value = pdf_ref_obj(pdf_doc_names()); break; case K_OBJ__RESOURCES: value = pdf_ref_obj(pdf_doc_current_page_resources()); break; case K_OBJ__CATALOG: value = pdf_ref_obj(pdf_doc_catalog()); break; case K_OBJ__DOCINFO: value = pdf_ref_obj(pdf_doc_docinfo()); break; default: if (ispageref(key)) value = pdf_doc_ref_page(atoi(key + 4)); else { value = pdf_names_lookup_reference(named_objects, key, strlen(key)); } break; } if (!value) { ERROR("Object reference %s not exist.", key); } return value; } pdf_obj * spc_lookup_object (const char *key) { pdf_obj *value = NULL; pdf_coord cp; int k; ASSERT(named_objects); if (!key) return NULL; for (k = 0; _rkeys[k] && strcmp(key, _rkeys[k]); k++); switch (k) { case K_OBJ__XPOS: cp.x = dvi_dev_xpos(); cp.y = 0.0; pdf_dev_transform(&cp, NULL); value = pdf_new_number(ROUND(cp.x, .01)); break; case K_OBJ__YPOS: cp.x = 0.0; cp.y = dvi_dev_ypos(); pdf_dev_transform(&cp, NULL); value = pdf_new_number(ROUND(cp.y, .01)); break; case K_OBJ__THISPAGE: value = pdf_doc_this_page(); break; case K_OBJ__PAGES: value = pdf_doc_page_tree(); break; case K_OBJ__NAMES: value = pdf_doc_names(); break; case K_OBJ__RESOURCES: value = pdf_doc_current_page_resources(); break; case K_OBJ__CATALOG: value = pdf_doc_catalog(); break; case K_OBJ__DOCINFO: value = pdf_doc_docinfo(); break; default: value = pdf_names_lookup_object(named_objects, key, strlen(key)); break; } /* spc_handler_pdfm_bead() in spc_pdfm.c controls NULL too. if (!value) { ERROR("Object reference %s not exist.", key); } */ return value; } void spc_push_object (const char *key, pdf_obj *value) { int error = 0; if (!key || !value) return; if (PDF_OBJ_INDIRECTTYPE(value)) { pdf_names_add_reference(named_objects, key, strlen(key), value); } else { error = pdf_names_add_object(named_objects, key, strlen(key), value); if (!error) { /* _FIXME_: * Objects created by pdf:obj must always * be written to output regardless of if * they are actually used in document. */ pdf_obj *obj_ref = pdf_names_lookup_reference(named_objects, key, strlen(key)); if (obj_ref) pdf_release_obj(obj_ref); } } return; } void spc_flush_object (const char *key) { pdf_names_close_object(named_objects, key, strlen(key)); } void spc_clear_objects (void) { pdf_delete_name_tree(&named_objects); named_objects = pdf_new_name_tree(); } static int spc_handler_unknown (struct spc_env *spe, struct spc_arg *args) { ASSERT(spe && args); args->curptr = args->endptr; return -1; } static void init_special (struct spc_handler *special, struct spc_env *spe, struct spc_arg *args, const char *p, long size, double x_user, double y_user, double mag) { special->key = NULL; special->exec = (spc_handler_fn_ptr) &spc_handler_unknown; spe->x_user = x_user; spe->y_user = y_user; spe->mag = mag; spe->pg = pdf_doc_current_page_number(); /* _FIXME_ */ args->curptr = p; args->endptr = args->curptr + size; args->base = args->curptr; args->command = NULL; return; } static void check_garbage (struct spc_arg *args) { ASSERT(args); if (args->curptr >= args->endptr) return; skip_white(&args->curptr, args->endptr); if (args->curptr < args->endptr) { WARN("Unparsed material at end of special ignored."); dump(args->curptr, args->endptr); } return; } static struct { const char *key; int (*bodhk_func) (); int (*eodhk_func) (); int (*bophk_func) (); int (*eophk_func) (); int (*check_func) (const char *, long); int (*setup_func) (struct spc_handler *, struct spc_env *, struct spc_arg *); } known_specials[] = { {"pdf:", spc_pdfm_at_begin_document, spc_pdfm_at_end_document, spc_pdfm_at_begin_page, spc_pdfm_at_end_page, spc_pdfm_check_special, spc_pdfm_setup_handler }, {"x:", spc_xtx_at_begin_document, spc_xtx_at_end_document, spc_xtx_at_begin_page, spc_xtx_at_end_page, spc_xtx_check_special, spc_xtx_setup_handler }, {"ps:", spc_dvips_at_begin_document, spc_dvips_at_end_document, spc_dvips_at_begin_page, spc_dvips_at_end_page, spc_dvips_check_special, spc_dvips_setup_handler }, {"color", spc_color_at_begin_document, spc_color_at_end_document, spc_color_at_begin_page, spc_color_at_end_page, spc_color_check_special, spc_color_setup_handler }, {"tpic", spc_tpic_at_begin_document, spc_tpic_at_end_document, spc_tpic_at_begin_page, spc_tpic_at_end_page, spc_tpic_check_special, spc_tpic_setup_handler }, {"html:", spc_html_at_begin_document, spc_html_at_end_document, spc_html_at_begin_page, spc_html_at_end_page, spc_html_check_special, spc_html_setup_handler }, {"unknown", spc_misc_at_begin_document, spc_misc_at_end_document, spc_misc_at_begin_page, spc_misc_at_end_page, spc_misc_check_special, spc_misc_setup_handler }, {NULL} /* end */ }; int spc_exec_at_begin_page (void) { int error = 0; int i; for (i = 0; known_specials[i].key != NULL; i++) { if (known_specials[i].bophk_func) { error = known_specials[i].bophk_func(); } } return error; } int spc_exec_at_end_page (void) { int error = 0; int i; for (i = 0; known_specials[i].key != NULL; i++) { if (known_specials[i].eophk_func) { error = known_specials[i].eophk_func(); } } return error; } int spc_exec_at_begin_document (void) { int error = 0; int i; ASSERT(!named_objects); named_objects = pdf_new_name_tree(); for (i = 0; known_specials[i].key != NULL; i++) { if (known_specials[i].bodhk_func) { error = known_specials[i].bodhk_func(); } } return error; } int spc_exec_at_end_document (void) { int error = 0; int i; for (i = 0; known_specials[i].key != NULL; i++) { if (known_specials[i].eodhk_func) { error = known_specials[i].eodhk_func(); } } if (named_objects) { pdf_delete_name_tree(&named_objects); } return error; } static void print_error (const char *name, struct spc_env *spe, struct spc_arg *ap) { const char *p; char ebuf[64]; int i; long pg = spe->pg; pdf_coord c; c.x = spe->x_user; c.y = spe->y_user; pdf_dev_transform(&c, NULL); if (ap->command && name) { WARN("Interpreting special command %s (%s) failed.", ap->command, name); WARN(">> at page=\"%ld\" position=\"(%g, %g)\" (in PDF)", pg, c.x, c.y); } for (i = 0, p = ap->base; i < 63 && p < ap->endptr; p++) { if (isprint(*p)) ebuf[i++] = *p; else if (i + 4 < 63) i += sprintf(ebuf + i, "\\x%02x", (unsigned char)*p); else break; } ebuf[i] = '\0'; if (ap->curptr < ap->endptr) { while (i-- > 60) ebuf[i] = '.'; } WARN(">> xxx \"%s\"", ebuf); if (ap->curptr < ap->endptr) { for (i = 0, p = ap->curptr; i < 63 && p < ap->endptr; p++) { if (isprint(*p)) ebuf[i++] = *p; else if (i + 4 < 63) i += sprintf(ebuf + i, "\\x%02x", (unsigned char)*p); else break; } ebuf[i] = '\0'; if (ap->curptr < ap->endptr) { while (i-- > 60) ebuf[i] = '.'; } WARN(">> Reading special command stopped around >>%s<<", ebuf); ap->curptr = ap->endptr; } } int spc_exec_special (const char *buffer, long size, double x_user, double y_user, double mag) { int error = -1; int i, found; struct spc_env spe; struct spc_arg args; struct spc_handler special; if (verbose > 3) { dump(buffer, buffer + size); } init_special(&special, &spe, &args, buffer, size, x_user, y_user, mag); for (i = 0; known_specials[i].key != NULL; i++) { found = known_specials[i].check_func(buffer, size); if (found) { error = known_specials[i].setup_func(&special, &spe, &args); if (!error) { error = special.exec(&spe, &args); } if (error) { print_error(known_specials[i].key, &spe, &args); } break; } } check_garbage(&args); return error; }