[gtksourceview/wip/regex-search] SearchContext: stop search on regex matching error

[Sébastien Wilmet <swilmet src gnome org>]

commit b7a475b391d26fbf934c32459c8ba09f27d23f3d
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Wed Aug 14 18:26:07 2013 +0200

    SearchContext: stop search on regex matching error

 gtksourceview/gtksourcesearchcontext.c |   50 ++++++++++++++++++-------------
 1 files changed, 29 insertions(+), 21 deletions(-)
---
diff --git a/gtksourceview/gtksourcesearchcontext.c b/gtksourceview/gtksourcesearchcontext.c
index 72de1c1..2d33edb 100644
--- a/gtksourceview/gtksourcesearchcontext.c
+++ b/gtksourceview/gtksourcesearchcontext.c
@@ -534,6 +534,13 @@ clear_search (GtkSourceSearchContext *search)
                search->priv->idle_scan_id = 0;
        }
 
+       if (search->priv->regex_error != NULL)
+       {
+               g_error_free (search->priv->regex_error);
+               search->priv->regex_error = NULL;
+               g_object_notify (G_OBJECT (search), "regex-error");
+       }
+
        clear_task (search);
 
        search->priv->occurrences_count = 0;
@@ -662,12 +669,12 @@ basic_forward_regex_search (GtkSourceSearchContext *search,
        gssize subject_length;
        GRegexMatchFlags match_options;
        GMatchInfo *match_info;
-       GError *error = NULL;
        GtkTextIter iter;
        gint iter_byte_pos;
        gboolean found;
 
-       if (search->priv->regex == NULL)
+       if (search->priv->regex == NULL ||
+           search->priv->regex_error != NULL)
        {
                return FALSE;
        }
@@ -694,7 +701,7 @@ basic_forward_regex_search (GtkSourceSearchContext *search,
                            start_pos,
                            match_options,
                            &match_info,
-                           &error);
+                           &search->priv->regex_error);
 
        iter = real_start;
        iter_byte_pos = 0;
@@ -707,10 +714,9 @@ basic_forward_regex_search (GtkSourceSearchContext *search,
                                          match_start,
                                          match_end);
 
-       if (error != NULL)
+       if (search->priv->regex_error != NULL)
        {
-               g_warning ("Regex matching error: %s", error->message);
-               g_error_free (error);
+               g_object_notify (G_OBJECT (search), "regex-error");
                found = FALSE;
        }
 
@@ -789,14 +795,14 @@ basic_backward_regex_search (GtkSourceSearchContext *search,
        gssize subject_length;
        GRegexMatchFlags match_options;
        GMatchInfo *match_info;
-       GError *error = NULL;
        GtkTextIter iter;
        gint iter_byte_pos;
        gboolean found;
        GtkTextIter tmp_match_start;
        GtkTextIter tmp_match_end;
 
-       if (search->priv->regex == NULL)
+       if (search->priv->regex == NULL ||
+           search->priv->regex_error != NULL)
        {
                return FALSE;
        }
@@ -825,7 +831,7 @@ basic_backward_regex_search (GtkSourceSearchContext *search,
                            start_pos,
                            match_options,
                            &match_info,
-                           &error);
+                           &search->priv->regex_error);
 
        iter = real_start;
        iter_byte_pos = 0;
@@ -843,13 +849,12 @@ basic_backward_regex_search (GtkSourceSearchContext *search,
                *match_start = tmp_match_start;
                *match_end = tmp_match_end;
 
-               g_match_info_next (match_info, &error);
+               g_match_info_next (match_info, &search->priv->regex_error);
        }
 
-       if (error != NULL)
+       if (search->priv->regex_error != NULL)
        {
-               g_warning ("Regex matching error: %s", error->message);
-               g_error_free (error);
+               g_object_notify (G_OBJECT (search), "regex-error");
                found = FALSE;
        }
 
@@ -1788,7 +1793,6 @@ regex_search_scan_segment (GtkSourceSearchContext *search,
        gssize subject_length;
        GRegexMatchFlags match_options;
        GMatchInfo *match_info;
-       GError *error = NULL;
        GtkTextIter iter;
        gint iter_byte_pos;
        gboolean segment_finished;
@@ -1802,7 +1806,8 @@ regex_search_scan_segment (GtkSourceSearchContext *search,
                                    segment_start,
                                    segment_end);
 
-       if (search->priv->regex == NULL)
+       if (search->priv->regex == NULL ||
+           search->priv->regex_error != NULL)
        {
                *stopped_at = *segment_end;
                return TRUE;
@@ -1858,7 +1863,7 @@ regex_search_scan_segment (GtkSourceSearchContext *search,
                            start_pos,
                            match_options,
                            &match_info,
-                           &error);
+                           &search->priv->regex_error);
 
        iter = real_start;
        iter_byte_pos = 0;
@@ -1886,13 +1891,12 @@ regex_search_scan_segment (GtkSourceSearchContext *search,
 
                search->priv->occurrences_count++;
 
-               g_match_info_next (match_info, &error);
+               g_match_info_next (match_info, &search->priv->regex_error);
        }
 
-       if (error != NULL)
+       if (search->priv->regex_error != NULL)
        {
-               g_warning ("Regex matching error: %s", error->message);
-               g_error_free (error);
+               g_object_notify (G_OBJECT (search), "regex-error");
        }
 
        if (g_match_info_is_partial_match (match_info))
@@ -3345,7 +3349,11 @@ regex_replace (GtkSourceSearchContext *search,
        GRegexMatchFlags match_options;
        GError *error = NULL;
 
-       g_assert (search->priv->regex != NULL);
+       if (search->priv->regex == NULL ||
+           search->priv->regex_error != NULL)
+       {
+               return FALSE;
+       }
 
        regex_search_get_real_start (search, match_start, &real_start, &start_pos);