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 #include "hhctrl.h"
  21 #include "stream.h"
  22
  23 #include "wine/debug.h"
  24
  25 WINE_DEFAULT_DEBUG_CHANNEL(htmlhelp);
  26
  27 /* Fill the TreeView object corresponding to the Index items */
  28 static void fill_index_tree(HWND hwnd, IndexItem *item)
  29 {
  30     int index = 0;
  31     LVITEMW lvi;
  32
  33     while(item) {
  34         TRACE("tree debug: %s\n", debugstr_w(item->keyword));
  35
  36         if(!item->keyword)
  37         {
  38             FIXME("HTML Help index item has no keyword.\n");
  39             item = item->next;
  40             continue;
  41         }
  42         memset(&lvi, 0, sizeof(lvi));
  43         lvi.iItem = index++;
  44         lvi.mask = LVIF_TEXT|LVIF_PARAM|LVIF_INDENT;
  45         lvi.iIndent = item->indentLevel;
  46         lvi.cchTextMax = strlenW(item->keyword)+1;
  47         lvi.pszText = item->keyword;
  48         lvi.lParam = (LPARAM)item;
  49         item->id = (HTREEITEM)SendMessageW(hwnd, LVM_INSERTITEMW, 0, (LPARAM)&lvi);
  50         item = item->next;
  51     }
  52 }
  53
  54 static void item_realloc(IndexItem *item, int num_items)
  55 {
  56     item->nItems = num_items;
  57     item->items = heap_realloc(item->items, sizeof(IndexSubItem)*item->nItems);
  58     item->items[item->nItems-1].name = NULL;
  59     item->items[item->nItems-1].local = NULL;
  60     item->itemFlags = 0x00;
  61 }
  62
  63 /* Parse the attributes correspond to a list item, including sub-topics.
  64  *
  65  * Each list item has, at minimum, a param of type "keyword" and two
  66  * parameters corresponding to a "sub-topic."  For each sub-topic there
  67  * must be a "name" param and a "local" param, if there is only one
  68  * sub-topic then there isn't really a sub-topic, the index will jump
  69  * directly to the requested item.
  70  */
  71 static void parse_index_obj_node_param(IndexItem *item, const char *text, UINT code_page)
  72 {
  73     const char *ptr;
  74     LPWSTR *param;
  75     int len;
  76
  77     ptr = get_attr(text, "name", &len);
  78     if(!ptr) {
  79         WARN("name attr not found\n");
  80         return;
  81     }
  82
  83     /* Allocate a new sub-item, either on the first run or whenever a
  84      * sub-topic has filled out both the "name" and "local" params.
  85      */
  86     if(item->itemFlags == 0x11 && (!strncasecmp("name", ptr, len) || !strncasecmp("local", ptr, len)))
  87         item_realloc(item, item->nItems+1);
  88     if(!strncasecmp("keyword", ptr, len)) {
  89         param = &item->keyword;
  90     }else if(!item->keyword && !strncasecmp("name", ptr, len)) {
  91         /* Some HTML Help index files use an additional "name" parameter
  92          * rather than the "keyword" parameter.  In this case, the first
  93          * occurrence of the "name" parameter is the keyword.
  94          */
  95         param = &item->keyword;
  96     }else if(!strncasecmp("name", ptr, len)) {
  97         item->itemFlags |= 0x01;
  98         param = &item->items[item->nItems-1].name;
  99     }else if(!strncasecmp("local", ptr, len)) {
 100         item->itemFlags |= 0x10;
 101         param = &item->items[item->nItems-1].local;
 102     }else {
 103         WARN("unhandled param %s\n", debugstr_an(ptr, len));
 104         return;
 105     }
 106
 107     ptr = get_attr(text, "value", &len);
 108     if(!ptr) {
 109         WARN("value attr not found\n");
 110         return;
 111     }
 112
 113     *param = decode_html(ptr, len, code_page);
 114 }
 115
 116 /* Parse the object tag corresponding to a list item.
 117  *
 118  * At this step we look for all of the "param" child tags, using this information
 119  * to build up the information about the list item.  When we reach the </object>
 120  * tag we know that we've finished parsing this list item.
 121  */
 122 static IndexItem *parse_index_sitemap_object(HHInfo *info, stream_t *stream)
 123 {
 124     strbuf_t node, node_name;
 125     IndexItem *item;
 126
 127     strbuf_init(&node);
 128     strbuf_init(&node_name);
 129
 130     item = heap_alloc_zero(sizeof(IndexItem));
 131     item->nItems = 0;
 132     item->items = heap_alloc_zero(0);
 133     item->itemFlags = 0x11;
 134
 135     while(next_node(stream, &node)) {
 136         get_node_name(&node, &node_name);
 137
 138         TRACE("%s\n", node.buf);
 139
 140         if(!strcasecmp(node_name.buf, "param")) {
 141             parse_index_obj_node_param(item, node.buf, info->pCHMInfo->codePage);
 142         }else if(!strcasecmp(node_name.buf, "/object")) {
 143             break;
 144         }else {
 145             WARN("Unhandled tag! %s\n", node_name.buf);
 146         }
 147
 148         strbuf_zero(&node);
 149     }
 150
 151     strbuf_free(&node);
 152     strbuf_free(&node_name);
 153
 154     return item;
 155 }
 156
 157 /* Parse the HTML list item node corresponding to a specific help entry.
 158  *
 159  * At this stage we look for the only child tag we expect to find under
 160  * the list item: the <OBJECT> tag.  We also only expect to find object
 161  * tags with the "type" attribute set to "text/sitemap".
 162  */
 163 static IndexItem *parse_li(HHInfo *info, stream_t *stream)
 164 {
 165     strbuf_t node, node_name;
 166     IndexItem *ret = NULL;
 167
 168     strbuf_init(&node);
 169     strbuf_init(&node_name);
 170
 171     while(next_node(stream, &node)) {
 172         get_node_name(&node, &node_name);
 173
 174         TRACE("%s\n", node.buf);
 175
 176         if(!strcasecmp(node_name.buf, "object")) {
 177             const char *ptr;
 178             int len;
 179
 180             static const char sz_text_sitemap[] = "text/sitemap";
 181
 182             ptr = get_attr(node.buf, "type", &len);
 183
 184             if(ptr && len == sizeof(sz_text_sitemap)-1
 185                && !memcmp(ptr, sz_text_sitemap, len)) {
 186                 ret = parse_index_sitemap_object(info, stream);
 187                 break;
 188             }
 189         }else {
 190             WARN("Unhandled tag! %s\n", node_name.buf);
 191         }
 192
 193         strbuf_zero(&node);
 194     }
 195     if(!ret)
 196         FIXME("Failed to parse <li> tag!\n");
 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             IndexItem *new_item;
 233
 234             new_item = parse_li(info, &stream);
 235             if(new_item && item->keyword && strcmpW(new_item->keyword, item->keyword) == 0) {
 236                 int num_items = item->nItems;
 237
 238                 item_realloc(item, num_items+1);
 239                 memcpy(&item->items[num_items], &new_item->items[0], sizeof(IndexSubItem));
 240                 heap_free(new_item->keyword);
 241                 heap_free(new_item->items);
 242                 heap_free(new_item);
 243             } else if(new_item) {
 244                 item->next = new_item;
 245                 item->next->merge = item->merge;
 246                 item = item->next;
 247                 item->indentLevel = indent_level;
 248             }
 249         }else if(!strcasecmp(node_name.buf, "ul")) {
 250             indent_level++;
 251         }else if(!strcasecmp(node_name.buf, "/ul")) {
 252             indent_level--;
 253         }else {
 254             WARN("Unhandled tag! %s\n", node_name.buf);
 255         }
 256
 257         strbuf_zero(&node);
 258     }
 259
 260     strbuf_free(&node);
 261     strbuf_free(&node_name);
 262 }
 263
 264 /* Initialize the HTML Help Index tab */
 265 void InitIndex(HHInfo *info)
 266 {
 267     IStream *stream;
 268
 269     info->index = heap_alloc_zero(sizeof(IndexItem));
 270     info->index->nItems = 0;
 271     SetChmPath(&info->index->merge, info->pCHMInfo->szFile, info->WinType.pszIndex);
 272
 273     stream = GetChmStream(info->pCHMInfo, info->pCHMInfo->szFile, &info->index->merge);
 274     if(!stream) {
 275         TRACE("Could not get index stream\n");
 276         return;
 277     }
 278
 279     parse_hhindex(info, stream, info->index);
 280     IStream_Release(stream);
 281
 282     fill_index_tree(info->tabs[TAB_INDEX].hwnd, info->index->next);
 283 }
 284
 285 /* Free all of the Index items, including all of the "sub-items" that
 286  * correspond to different sub-topics.
 287  */
 288 void ReleaseIndex(HHInfo *info)
 289 {
 290     IndexItem *item = info->index, *next;
 291     int i;
 292
 293     if(!item) return;
 294     /* Note: item->merge is identical for all items, only free once */
 295     heap_free(item->merge.chm_file);
 296     heap_free(item->merge.chm_index);
 297     while(item) {
 298         next = item->next;
 299
 300         heap_free(item->keyword);
 301         for(i=0;i<item->nItems;i++) {
 302             heap_free(item->items[i].name);
 303             heap_free(item->items[i].local);
 304         }
 305         heap_free(item->items);
 306
 307         item = next;
 308     }
 309 }