dlls/hhctrl.ocx/index.c

   1 /*
   2  * Copyright 2007 Jacek Caban for CodeWeavers
   3  * Copyright 2010 Erich Hoover
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 #define NONAMELESSUNION
  21 #define NONAMELESSSTRUCT
  22
  23 #include "hhctrl.h"
  24 #include "stream.h"
  25
  26 #include "wine/debug.h"
  27
  28 WINE_DEFAULT_DEBUG_CHANNEL(htmlhelp);
  29
  30 /* Fill the TreeView object corresponding to the Index items */
  31 static void fill_index_tree(HWND hwnd, IndexItem *item)
  32 {
  33     int index = 0;
  34     LVITEMW lvi;
  35
  36     while(item) {
  37         TRACE("tree debug: %s\n", debugstr_w(item->keyword));
  38
  39         if(!item->keyword)
  40         {
  41             FIXME("HTML Help index item has no keyword.\n");
  42             item = item->next;
  43             continue;
  44         }
  45         memset(&lvi, 0, sizeof(lvi));
  46         lvi.iItem = index++;
  47         lvi.mask = LVIF_TEXT|LVIF_PARAM|LVIF_INDENT;
  48         lvi.iIndent = item->indentLevel;
  49         lvi.cchTextMax = strlenW(item->keyword)+1;
  50         lvi.pszText = item->keyword;
  51         lvi.lParam = (LPARAM)item;
  52         item->id = (HTREEITEM)SendMessageW(hwnd, LVM_INSERTITEMW, 0, (LPARAM)&lvi);
  53         item = item->next;
  54     }
  55 }
  56
  57 /* Parse the attributes correspond to a list item, including sub-topics.
  58  *
  59  * Each list item has, at minimum, a param of type "keyword" and two
  60  * parameters corresponding to a "sub-topic."  For each sub-topic there
  61  * must be a "name" param and a "local" param, if there is only one
  62  * sub-topic then there isn't really a sub-topic, the index will jump
  63  * directly to the requested item.
  64  */
  65 static void parse_index_obj_node_param(IndexItem *item, const char *text)
  66 {
  67     const char *ptr;
  68     LPWSTR *param;
  69     int len, wlen;
  70
  71     ptr = get_attr(text, "name", &len);
  72     if(!ptr) {
  73         WARN("name attr not found\n");
  74         return;
  75     }
  76
  77     /* Allocate a new sub-item, either on the first run or whenever a
  78      * sub-topic has filled out both the "name" and "local" params.
  79      */
  80     if(item->itemFlags == 0x11 && (!strncasecmp("name", ptr, len) || !strncasecmp("local", ptr, len))) {
  81         item->nItems++;
  82         item->items = heap_realloc(item->items, sizeof(IndexSubItem)*item->nItems);
  83         item->items[item->nItems-1].name = NULL;
  84         item->items[item->nItems-1].local = NULL;
  85         item->itemFlags = 0x00;
  86     }
  87     if(!strncasecmp("keyword", ptr, len)) {
  88         param = &item->keyword;
  89     }else if(!item->keyword && !strncasecmp("name", ptr, len)) {
  90         /* Some HTML Help index files use an additional "name" parameter
  91          * rather than the "keyword" parameter.  In this case, the first
  92          * occurance of the "name" parameter is the keyword.
  93          */
  94         param = &item->keyword;
  95     }else if(!strncasecmp("name", ptr, len)) {
  96         item->itemFlags |= 0x01;
  97         param = &item->items[item->nItems-1].name;
  98     }else if(!strncasecmp("local", ptr, len)) {
  99         item->itemFlags |= 0x10;
 100         param = &item->items[item->nItems-1].local;
 101     }else {
 102         WARN("unhandled param %s\n", debugstr_an(ptr, len));
 103         return;
 104     }
 105
 106     ptr = get_attr(text, "value", &len);
 107     if(!ptr) {
 108         WARN("value attr not found\n");
 109         return;
 110     }
 111
 112     wlen = MultiByteToWideChar(CP_ACP, 0, ptr, len, NULL, 0);
 113     *param = heap_alloc((wlen+1)*sizeof(WCHAR));
 114     MultiByteToWideChar(CP_ACP, 0, ptr, len, *param, wlen);
 115     (*param)[wlen] = 0;
 116 }
 117
 118 /* Parse the object tag corresponding to a list item.
 119  *
 120  * At this step we look for all of the "param" child tags, using this information
 121  * to build up the information about the list item.  When we reach the </object>
 122  * tag we know that we've finished parsing this list item.
 123  */
 124 static IndexItem *parse_index_sitemap_object(HHInfo *info, stream_t *stream)
 125 {
 126     strbuf_t node, node_name;
 127     IndexItem *item;
 128
 129     strbuf_init(&node);
 130     strbuf_init(&node_name);
 131
 132     item = heap_alloc_zero(sizeof(IndexItem));
 133     item->nItems = 0;
 134     item->items = heap_alloc_zero(0);
 135     item->itemFlags = 0x11;
 136
 137     while(next_node(stream, &node)) {
 138         get_node_name(&node, &node_name);
 139
 140         TRACE("%s\n", node.buf);
 141
 142         if(!strcasecmp(node_name.buf, "param")) {
 143             parse_index_obj_node_param(item, node.buf);
 144         }else if(!strcasecmp(node_name.buf, "/object")) {
 145             break;
 146         }else {
 147             WARN("Unhandled tag! %s\n", node_name.buf);
 148         }
 149
 150         strbuf_zero(&node);
 151     }
 152
 153     strbuf_free(&node);
 154     strbuf_free(&node_name);
 155
 156     return item;
 157 }
 158
 159 /* Parse the HTML list item node corresponding to a specific help entry.
 160  *
 161  * At this stage we look for the only child tag we expect to find under
 162  * the list item: the <OBJECT> tag.  We also only expect to find object
 163  * tags with the "type" attribute set to "text/sitemap".
 164  */
 165 static IndexItem *parse_li(HHInfo *info, stream_t *stream)
 166 {
 167     strbuf_t node, node_name;
 168     IndexItem *ret = NULL;
 169
 170     strbuf_init(&node);
 171     strbuf_init(&node_name);
 172
 173     while(next_node(stream, &node)) {
 174         get_node_name(&node, &node_name);
 175
 176         TRACE("%s\n", node.buf);
 177
 178         if(!strcasecmp(node_name.buf, "object")) {
 179             const char *ptr;
 180             int len;
 181
 182             static const char sz_text_sitemap[] = "text/sitemap";
 183
 184             ptr = get_attr(node.buf, "type", &len);
 185
 186             if(ptr && len == sizeof(sz_text_sitemap)-1
 187                && !memcmp(ptr, sz_text_sitemap, len)) {
 188                 ret = parse_index_sitemap_object(info, stream);
 189                 break;
 190             }
 191         }else {
 192             WARN("Unhandled tag! %s\n", node_name.buf);
 193         }
 194
 195         strbuf_zero(&node);
 196     }
 197
 198     strbuf_free(&node);
 199     strbuf_free(&node_name);
 200
 201     return ret;
 202 }
 203
 204 /* Parse the HTML Help page corresponding to all of the Index items.
 205  *
 206  * At this high-level stage we locate out each HTML list item tag.
 207  * Since there is no end-tag for the <LI> item, we must hope that
 208  * the <LI> entry is parsed correctly or tags might get lost.
 209  *
 210  * Within each entry it is also possible to encounter an additional
 211  * <UL> tag.  When this occurs the tag indicates that the topics
 212  * contained within it are related to the parent <LI> topic and
 213  * should be inset by an indent.
 214  */
 215 static void parse_hhindex(HHInfo *info, IStream *str, IndexItem *item)
 216 {
 217     stream_t stream;
 218     strbuf_t node, node_name;
 219     int indent_level = -1;
 220
 221     strbuf_init(&node);
 222     strbuf_init(&node_name);
 223
 224     stream_init(&stream, str);
 225
 226     while(next_node(&stream, &node)) {
 227         get_node_name(&node, &node_name);
 228
 229         TRACE("%s\n", node.buf);
 230
 231         if(!strcasecmp(node_name.buf, "li")) {
 232             item->next = parse_li(info, &stream);
 233             item->next->merge = item->merge;
 234             item = item->next;
 235             item->indentLevel = indent_level;
 236         }else if(!strcasecmp(node_name.buf, "ul")) {
 237             indent_level++;
 238         }else if(!strcasecmp(node_name.buf, "/ul")) {
 239             indent_level--;
 240         }else {
 241             WARN("Unhandled tag! %s\n", node_name.buf);
 242         }
 243
 244         strbuf_zero(&node);
 245     }
 246
 247     strbuf_free(&node);
 248     strbuf_free(&node_name);
 249 }
 250
 251 /* Initialize the HTML Help Index tab */
 252 void InitIndex(HHInfo *info)
 253 {
 254     IStream *stream;
 255
 256     info->index = heap_alloc_zero(sizeof(IndexItem));
 257     info->index->nItems = 0;
 258     SetChmPath(&info->index->merge, info->pCHMInfo->szFile, info->WinType.pszIndex);
 259
 260     stream = GetChmStream(info->pCHMInfo, info->pCHMInfo->szFile, &info->index->merge);
 261     if(!stream) {
 262         TRACE("Could not get index stream\n");
 263         return;
 264     }
 265
 266     parse_hhindex(info, stream, info->index);
 267     IStream_Release(stream);
 268
 269     fill_index_tree(info->tabs[TAB_INDEX].hwnd, info->index->next);
 270 }
 271
 272 /* Free all of the Index items, including all of the "sub-items" that
 273  * correspond to different sub-topics.
 274  */
 275 void ReleaseIndex(HHInfo *info)
 276 {
 277     IndexItem *item = info->index, *next;
 278     int i;
 279
 280     /* Note: item->merge is identical for all items, only free once */
 281     heap_free(item->merge.chm_file);
 282     heap_free(item->merge.chm_index);
 283     while(item) {
 284         next = item->next;
 285
 286         heap_free(item->keyword);
 287         for(i=0;i<item->nItems;i++) {
 288             heap_free(item->items[i].name);
 289             heap_free(item->items[i].local);
 290         }
 291         heap_free(item->items);
 292
 293         item = next;
 294     }
 295 }