libyelp/yelp-uri-builder.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * Copyright (C) 2014 Igalia S.L.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * This program 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  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public
  16  * License along with this program; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "yelp-uri-builder.h"
  22
  23 #define BOGUS_PREFIX "bogus-"
  24 #define BOGUS_PREFIX_LEN 6
  25
  26 gchar *
  27 build_network_uri (const gchar *uri)
  28 {
  29     SoupURI *soup_uri;
  30     gchar *bogus_scheme, *path, *retval;
  31
  32     soup_uri = soup_uri_new (uri);
  33
  34     /* Build the URI that will be passed to WebKit. Relative URIs will be
  35      * automatically resolved by WebKit, so we need to add a leading slash to
  36      * help: and ghelp: URIs to be considered as absolute by WebKit.
  37      */
  38     if (g_str_equal (soup_uri->scheme, "ghelp") || g_str_equal (soup_uri->scheme, "gnome-help") ||
  39         g_str_equal (soup_uri->scheme, "help") || g_str_equal (soup_uri->scheme, "help-list") ||
  40         g_str_equal (soup_uri->scheme, "info") || g_str_equal (soup_uri->scheme, "man")) {
  41
  42         if (g_str_equal (soup_uri->scheme, "info") && soup_uri->fragment) {
  43             path = g_strdup_printf ("/%s/%s", soup_uri->path, soup_uri->fragment);
  44             soup_uri_set_fragment (soup_uri, NULL);
  45         } else {
  46             path = g_strdup_printf ("/%s", soup_uri->path);
  47         }
  48         soup_uri_set_path (soup_uri, path);
  49         g_free (path);
  50     }
  51
  52     /* We need to use a different scheme from help or ghelp to be able to deal
  53        with absolute uris in the HTML. Help uri schemes are help:gnome-help/...
  54        they dont have a slash after the colon so WebKit resolves them as a relative
  55        url when they are not. This doesn't happen if the current page URI has a different
  56        scheme from absolute uri scheme.
  57     */
  58     bogus_scheme = build_network_scheme (soup_uri->scheme);
  59     soup_uri_set_scheme (soup_uri, bogus_scheme);
  60
  61     retval = soup_uri_to_string (soup_uri, FALSE);
  62     soup_uri_free (soup_uri);
  63     g_free (bogus_scheme);
  64
  65     return retval;
  66 }
  67
  68 gchar *
  69 build_yelp_uri (const gchar *uri_str)
  70 {
  71   gchar *resource;
  72   int path_len;
  73   gchar *uri = g_strdup (uri_str);
  74
  75   if (!g_str_has_prefix (uri, BOGUS_PREFIX))
  76       return uri;
  77
  78   memmove (uri, uri + BOGUS_PREFIX_LEN, strlen (uri) - BOGUS_PREFIX_LEN + 1);
  79
  80   /* Remove the leading slash */
  81   resource = strstr (uri, ":");
  82   resource++;
  83   memmove (resource, resource + 1, strlen (resource));
  84
  85   /* Remove the trailing slash if any */
  86   path_len = strlen (uri);
  87   if (uri[path_len - 1] == '/')
  88     uri[path_len - 1] = '\0';
  89
  90   if (g_str_has_prefix (uri, "info:")) {
  91       gchar *frag;
  92
  93       frag = g_strrstr (uri, "/");
  94       if (frag)
  95           frag[0] = '#';
  96   }
  97
  98   return uri;
  99 }
 100
 101 gchar *
 102 build_network_scheme (const gchar *scheme)
 103 {
 104         return g_strdup_printf (BOGUS_PREFIX "%s", scheme);
 105 }