Annotation of libwww/Library/src/HText.c, revision 2.1
2.1 ! frystyk 1: /*
! 2: ** HYPERTEXT OBJECT BUILDER
! 3: **
! 4: ** (c) COPYRIGHT MIT 1999.
! 5: ** Please first read the full copyright statement in the file COPYRIGH.
! 6: ** @(#) $Id: HTML.c,v 1.74 1998/10/15 20:07:55 frystyk Exp $
! 7: **
! 8: ** This generates of a hypertext object and calls the application
! 9: ** via callbacks.
! 10: */
! 11:
! 12: /* Library include files */
! 13: #include "wwwsys.h"
! 14: #include "WWWUtil.h"
! 15: #include "WWWCore.h"
! 16: #include "HText.h"
! 17: #include "HTextImp.h"
! 18:
! 19: /* Default callbacks that the application can register */
! 20: PRIVATE HText_new * text_new;
! 21: PRIVATE HText_delete * text_delete;
! 22: PRIVATE HText_build * text_build;
! 23: PRIVATE HText_addText * text_addText;
! 24: PRIVATE HText_foundLink * text_foundLink;
! 25: PRIVATE HText_beginElement * text_beginElement;
! 26: PRIVATE HText_endElement * text_endElement;
! 27: PRIVATE HText_unparsedBeginElement * text_unparsedBeginElement;
! 28: PRIVATE HText_unparsedEndElement * text_unparsedEndElement;
! 29: PRIVATE HText_unparsedEntity * text_unparsedEntity;
! 30:
! 31: /* HText handler instance */
! 32: struct _HTextImp {
! 33: HText * app;
! 34: HText_new * text_new;
! 35: HText_delete * text_delete;
! 36: HText_build * text_build;
! 37: HText_addText * text_addText;
! 38: HText_foundLink * text_foundLink;
! 39: HText_beginElement * text_beginElement;
! 40: HText_endElement * text_endElement;
! 41: HText_unparsedBeginElement *text_unparsedBeginElement;
! 42: HText_unparsedEndElement * text_unparsedEndElement;
! 43: HText_unparsedEntity * text_unparsedEntity;
! 44: };
! 45:
! 46: /* --------------------------------------------------------------------------- */
! 47:
! 48: PUBLIC HTextImp * HTextImp_new (HTRequest * request,
! 49: HTParentAnchor * anchor,
! 50: HTStream * output_stream)
! 51: {
! 52: HTextImp * me = NULL;
! 53: if ((me = (HTextImp *) HT_CALLOC(1, sizeof (HTextImp))) == NULL)
! 54: HT_OUTOFMEM("HTextImp_new");
! 55: if (me->text_new) me->app = (*me->text_new)(request, anchor, output_stream);
! 56: me->text_new = text_new;
! 57: me->text_delete = text_delete;
! 58: me->text_build = text_build;
! 59: me->text_addText = text_addText;
! 60: me->text_foundLink = text_foundLink;
! 61: me->text_beginElement = text_beginElement;
! 62: me->text_endElement = text_endElement;
! 63: me->text_unparsedBeginElement = text_unparsedBeginElement;
! 64: me->text_unparsedEndElement = text_unparsedEndElement;
! 65: me->text_unparsedEntity = text_unparsedEntity;
! 66: return me;
! 67: }
! 68:
! 69: PUBLIC BOOL HTextImp_delete (HTextImp * me)
! 70: {
! 71: if (me) {
! 72: HText * app = me->app;
! 73: HT_FREE(me);
! 74: return (me->app && me->text_delete) ? (*me->text_delete)(app) : NO;
! 75: }
! 76: return NO;
! 77: }
! 78:
! 79: PUBLIC void HTextImp_build (HTextImp * me, HTextStatus status)
! 80: {
! 81: if (me && me->text_build)
! 82: (*me->text_build)(me->app, status);
! 83: }
! 84:
! 85: PUBLIC void HTextImp_addText (HTextImp * me,
! 86: const char * buffer,
! 87: int length)
! 88: {
! 89: if (me && me->text_addText)
! 90: (*me->text_addText)(me->app, buffer, length);
! 91: }
! 92:
! 93: PUBLIC void HTextImp_foundLink (HTextImp * me,
! 94: int element_number,
! 95: int attribute_number,
! 96: HTChildAnchor *anchor,
! 97: const BOOL * present,
! 98: const char ** value)
! 99: {
! 100: if (me && me->text_foundLink)
! 101: (*me->text_foundLink)(me->app, element_number, attribute_number,
! 102: anchor, present, value);
! 103: }
! 104:
! 105: PUBLIC void HTextImp_beginElement (HTextImp * me,
! 106: int element_number,
! 107: const BOOL * present,
! 108: const char **value)
! 109: {
! 110: if (me && me->text_beginElement)
! 111: (*me->text_beginElement)(me->app, element_number, present, value);
! 112: }
! 113:
! 114: PUBLIC void HTextImp_endElement (HTextImp * me,
! 115: int element_number)
! 116: {
! 117: if (me && me->text_endElement)
! 118: (*me->text_endElement)(me->app, element_number);
! 119: }
! 120:
! 121: PUBLIC void HTextImp_unparsedBeginElement (HTextImp * me,
! 122: const char * buffer,
! 123: int length)
! 124: {
! 125: if (me && me->text_unparsedBeginElement)
! 126: (*me->text_unparsedBeginElement)(me->app, buffer, length);
! 127: }
! 128:
! 129: PUBLIC void HTextImp_unparsedEndElement (HTextImp * me,
! 130: const char * buffer,
! 131: int length)
! 132: {
! 133: if (me && me->text_unparsedEndElement)
! 134: (*me->text_unparsedEndElement)(me->app, buffer, length);
! 135: }
! 136:
! 137: PUBLIC void HTextImp_unparsedEntity (HTextImp * me,
! 138: const char * buffer,
! 139: int length)
! 140: {
! 141: if (me && me->text_unparsedEntity)
! 142: (*me->text_unparsedEntity)(me->app, buffer, length);
! 143: }
! 144:
! 145: /* --------------------------------------------------------------------------- */
! 146:
! 147: PUBLIC BOOL HText_registerCDCallback (HText_new * ncb,
! 148: HText_delete * dcb)
! 149: {
! 150: if (ncb && dcb) {
! 151: text_new = ncb;
! 152: text_delete = dcb;
! 153: return YES;
! 154: }
! 155: return NO;
! 156: }
! 157:
! 158: PUBLIC BOOL HText_unregisterCDCallback (void)
! 159: {
! 160: text_new = NULL;
! 161: text_delete = NULL;
! 162: return YES;
! 163: }
! 164:
! 165: PUBLIC BOOL HText_registerTextCallback (HText_addText * tcb)
! 166: {
! 167: text_addText = tcb;
! 168: return YES;
! 169: }
! 170:
! 171: PUBLIC BOOL HText_unregisterTextCallback (void)
! 172: {
! 173: text_addText = NULL;
! 174: return YES;
! 175: }
! 176:
! 177: PUBLIC BOOL HText_registerLinkCallback (HText_foundLink * lcb)
! 178: {
! 179: text_foundLink = lcb;
! 180: return YES;
! 181: }
! 182:
! 183: PUBLIC BOOL HText_unregisterLinkCallback (void)
! 184: {
! 185: text_foundLink = NULL;
! 186: return YES;
! 187: }
! 188:
! 189: PUBLIC BOOL HText_registerElementCallback (HText_beginElement * bcb,
! 190: HText_endElement * ecb)
! 191: {
! 192: text_beginElement = bcb;
! 193: text_endElement = ecb;
! 194: return YES;
! 195: }
! 196:
! 197: PUBLIC BOOL HText_unregisterElementCallback (void)
! 198: {
! 199: text_beginElement = NULL;
! 200: return YES;
! 201: }
! 202:
! 203: PUBLIC BOOL HText_registerUnparsedElementCallback (HText_unparsedBeginElement * ubcb,
! 204: HText_unparsedBeginElement * uecb)
! 205: {
! 206: text_unparsedBeginElement = ubcb;
! 207: text_unparsedEndElement = uecb;
! 208: return YES;
! 209: }
! 210:
! 211: PUBLIC BOOL HText_unregisterUnparsedElementCallback (void)
! 212: {
! 213: text_unparsedBeginElement = NULL;
! 214: text_unparsedEndElement = NULL;
! 215: return YES;
! 216: }
! 217:
! 218: PUBLIC BOOL HText_registerUnparsedEntityCallback (HText_unparsedEntity * tcb)
! 219: {
! 220: text_unparsedEntity = tcb;
! 221: return YES;
! 222: }
! 223:
! 224: PUBLIC BOOL HText_unregisterUnparsedEntityCallback (void)
! 225: {
! 226: text_unparsedEntity = NULL;
! 227: return YES;
! 228: }
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