diff options
Diffstat (limited to 'tp-account-widgets/tpaw-string-parser.c')
| -rw-r--r-- | tp-account-widgets/tpaw-string-parser.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/tp-account-widgets/tpaw-string-parser.c b/tp-account-widgets/tpaw-string-parser.c new file mode 100644 index 000000000..172a76303 --- /dev/null +++ b/tp-account-widgets/tpaw-string-parser.c @@ -0,0 +1,198 @@ +/* + * Copyright (C) 2010 Collabora Ltd. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + * Authors: Xavier Claessens <xclaesse@gmail.com> + */ + +#include "config.h" +#include "tpaw-string-parser.h" + +#include "empathy-ui-utils.h" + +#define SCHEMES "([a-zA-Z\\+]+)" +#define INVALID_CHARS "\\s\"<>" +#define INVALID_CHARS_EXT INVALID_CHARS "\\[\\](){},;:" +#define INVALID_CHARS_FULL INVALID_CHARS_EXT "?'" +#define BODY "([^"INVALID_CHARS_FULL"])([^"INVALID_CHARS_EXT"]*)" +#define BODY_END "([^"INVALID_CHARS"]*)[^"INVALID_CHARS_FULL".]" +#define URI_REGEX "("SCHEMES"://"BODY_END")" \ + "|((www|ftp)\\."BODY_END")" \ + "|((mailto:)?"BODY"@"BODY"\\."BODY_END")" + +static GRegex * +uri_regex_dup_singleton (void) +{ + static GRegex *uri_regex = NULL; + + /* We intentionally leak the regex so it's not recomputed */ + if (!uri_regex) { + GError *error = NULL; + + uri_regex = g_regex_new (URI_REGEX, 0, 0, &error); + if (uri_regex == NULL) { + g_warning ("Failed to create reg exp: %s", error->message); + g_error_free (error); + return NULL; + } + } + + return g_regex_ref (uri_regex); +} + +void +tpaw_string_parser_substr (const gchar *text, + gssize len, + TpawStringParser *parsers, + gpointer user_data) +{ + if (parsers != NULL && parsers[0].match_func != NULL) { + parsers[0].match_func (text, len, + parsers[0].replace_func, parsers + 1, + user_data); + } +} + +void +tpaw_string_match_link (const gchar *text, + gssize len, + TpawStringReplace replace_func, + TpawStringParser *sub_parsers, + gpointer user_data) +{ + GRegex *uri_regex; + GMatchInfo *match_info; + gboolean match; + gint last = 0; + + uri_regex = uri_regex_dup_singleton (); + if (uri_regex == NULL) { + tpaw_string_parser_substr (text, len, sub_parsers, user_data); + return; + } + + match = g_regex_match_full (uri_regex, text, len, 0, 0, &match_info, NULL); + if (match) { + gint s = 0, e = 0; + + do { + g_match_info_fetch_pos (match_info, 0, &s, &e); + + if (s > last) { + /* Append the text between last link (or the + * start of the message) and this link */ + tpaw_string_parser_substr (text + last, + s - last, + sub_parsers, + user_data); + } + + replace_func (text + s, e - s, NULL, user_data); + + last = e; + } while (g_match_info_next (match_info, NULL)); + } + + tpaw_string_parser_substr (text + last, len - last, + sub_parsers, user_data); + + g_match_info_free (match_info); + g_regex_unref (uri_regex); +} + +void +tpaw_string_match_all (const gchar *text, + gssize len, + TpawStringReplace replace_func, + TpawStringParser *sub_parsers, + gpointer user_data) +{ + replace_func (text, len, NULL, user_data); +} + +void +tpaw_string_replace_link (const gchar *text, + gssize len, + gpointer match_data, + gpointer user_data) +{ + GString *string = user_data; + gchar *real_url; + gchar *title; + gchar *markup; + + real_url = empathy_make_absolute_url_len (text, len); + + /* Need to copy manually, because g_markup_printf_escaped does not work + * with string precision pitfalls. */ + title = g_strndup (text, len); + + /* Append the link inside <a href=""></a> tag */ + markup = g_markup_printf_escaped ("<a href=\"%s\">%s</a>", + real_url, title); + + g_string_append (string, markup); + + g_free (real_url); + g_free (title); + g_free (markup); +} + +void +tpaw_string_replace_escaped (const gchar *text, + gssize len, + gpointer match_data, + gpointer user_data) +{ + GString *string = user_data; + gchar *escaped; + guint i; + gsize escaped_len, old_len; + + escaped = g_markup_escape_text (text, len); + escaped_len = strlen (escaped); + + /* Allocate more space to string (we really need a g_string_extend...) */ + old_len = string->len; + g_string_set_size (string, old_len + escaped_len); + g_string_truncate (string, old_len); + + /* Remove '\r' */ + for (i = 0; i < escaped_len; i++) { + if (escaped[i] != '\r') + g_string_append_c (string, escaped[i]); + } + + g_free (escaped); +} + +gchar * +tpaw_add_link_markup (const gchar *text) +{ + TpawStringParser parsers[] = { + {tpaw_string_match_link, tpaw_string_replace_link}, + {tpaw_string_match_all, tpaw_string_replace_escaped}, + {NULL, NULL} + }; + GString *string; + + g_return_val_if_fail (text != NULL, NULL); + + string = g_string_sized_new (strlen (text)); + tpaw_string_parser_substr (text, -1, parsers, string); + + return g_string_free (string, FALSE); +} |