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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; coding: utf-8 -*- */
/* gtksourceutils.c
* This file is part of GtkSourceView
*
* Copyright (C) 2005 - Paolo Borelli
* Copyright (C) 2013 - Sébastien Wilmet <swilmet@gnome.org>
*
* GtkSourceView 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.
*
* GtkSourceView 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
*/
/**
* SECTION:utils
* @title: GtkSourceUtils
* @short_description: Utilities functions
*
* Utilities functions.
*/
#include "gtksourceutils.h"
#include <string.h>
/**
* gtk_source_utils_unescape_search_text:
* @text: the text to unescape.
*
* Use this function before gtk_source_search_settings_set_search_text(), to
* unescape the following sequences of characters: \n, \r, \t and \\.
* The purpose is to easily write those characters in a search entry.
*
* Note that unescaping the search text is not needed for regular expression
* searches.
*
* See also: gtk_source_utils_escape_search_text().
*
* Returns: the unescaped @text.
* Since: 3.10
*/
gchar *
gtk_source_utils_unescape_search_text (const gchar *text)
{
GString *str;
gint length;
gboolean drop_prev = FALSE;
const gchar *cur;
const gchar *end;
const gchar *prev;
if (text == NULL)
{
return NULL;
}
length = strlen (text);
str = g_string_new ("");
cur = text;
end = text + length;
prev = NULL;
while (cur != end)
{
const gchar *next;
next = g_utf8_next_char (cur);
if (prev && (*prev == '\\'))
{
switch (*cur)
{
case 'n':
str = g_string_append (str, "\n");
break;
case 'r':
str = g_string_append (str, "\r");
break;
case 't':
str = g_string_append (str, "\t");
break;
case '\\':
str = g_string_append (str, "\\");
drop_prev = TRUE;
break;
default:
str = g_string_append (str, "\\");
str = g_string_append_len (str, cur, next - cur);
break;
}
}
else if (*cur != '\\')
{
str = g_string_append_len (str, cur, next - cur);
}
else if ((next == end) && (*cur == '\\'))
{
str = g_string_append (str, "\\");
}
if (!drop_prev)
{
prev = cur;
}
else
{
prev = NULL;
drop_prev = FALSE;
}
cur = next;
}
return g_string_free (str, FALSE);
}
/**
* gtk_source_utils_escape_search_text:
* @text: the text to escape.
*
* Use this function to escape the following characters: \n, \r, \t and \.
*
* For a regular expression search, use g_regex_escape_string() instead.
*
* One possible use case is to take the #GtkTextBuffer's selection and put it in a
* search entry. The selection can contain tabulations, newlines, etc. So it's
* better to escape those special characters to better fit in the search entry.
*
* See also: gtk_source_utils_unescape_search_text().
*
* <warning>
* The escape and unescape functions are not reciprocal! For example,
* escape (unescape (\)) = \\. So avoid cycles such as: search entry -> unescape
* -> search settings -> escape -> search entry. The original search entry text
* may be modified.
* </warning>
*
* Returns: the escaped @text.
* Since: 3.10
*/
gchar *
gtk_source_utils_escape_search_text (const gchar* text)
{
GString *str;
gint length;
const gchar *p;
const gchar *end;
if (text == NULL)
{
return NULL;
}
length = strlen (text);
str = g_string_new ("");
p = text;
end = text + length;
while (p != end)
{
const gchar *next = g_utf8_next_char (p);
switch (*p)
{
case '\n':
g_string_append (str, "\\n");
break;
case '\r':
g_string_append (str, "\\r");
break;
case '\t':
g_string_append (str, "\\t");
break;
case '\\':
g_string_append (str, "\\\\");
break;
default:
g_string_append_len (str, p, next - p);
break;
}
p = next;
}
return g_string_free (str, FALSE);
}
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