Bug #685051 Adding --mid-search option to --list

This will enable users to find a row with a text matching the
middle of the row.

Consider the following list:

    Little piggy one
    Little piggy two
    Little piggy three

As a user I would expect that entering 'th' would focus the last row, because
it's the first one that contains 'th'

src/option.c

@@ -83,6 +83,7 @@ static gchar   *zenity_list_print_column;
 static gchar   *zenity_list_hide_column;
 static gboolean zenity_list_hide_header;
 static gboolean zenity_list_imagelist;
+static gboolean zenity_list_mid_search;
 
 #ifdef HAVE_LIBNOTIFY
 /* Notification Dialog Options */
@@ -651,6 +652,15 @@ static GOptionEntry list_options[] = {
     N_("Hides the column headers"),
     NULL
   },
+  {
+    "mid-search",
+    '\0',
+    G_OPTION_FLAG_NOALIAS,
+    G_OPTION_ARG_NONE,
+    &zenity_list_mid_search,
+    N_("Change list default search function searching for text in the middle, not on the beginning"),
+    NULL
+  },
   { 
     NULL 
   } 
@@ -1531,6 +1541,7 @@ zenity_list_pre_callback (GOptionContext *context,
   zenity_list_hide_header = FALSE;
   zenity_list_print_column = NULL;
   zenity_list_hide_column = NULL;
+  zenity_list_mid_search = FALSE;
 
   return TRUE;
 }
@@ -1876,6 +1887,7 @@ zenity_list_post_callback (GOptionContext *context,
     results->tree_data->hide_column = zenity_list_hide_column;
     results->tree_data->hide_header = zenity_list_hide_header;
     results->tree_data->separator = zenity_general_separator;
+    results->tree_data->mid_search = zenity_list_mid_search;
   } else {
     if (zenity_list_columns)
       zenity_option_error (zenity_option_get_name (list_options, &zenity_list_columns),
@@ -1904,6 +1916,9 @@ zenity_list_post_callback (GOptionContext *context,
     if (zenity_list_hide_header)
       zenity_option_error (zenity_option_get_name (list_options, &zenity_list_hide_header),
                            ERROR_SUPPORT);
+    if (zenity_list_mid_search)
+      zenity_option_error (zenity_option_get_name (list_options, &zenity_list_mid_search),
+                           ERROR_SUPPORT);
   }
     
   return TRUE;

src/tree.c

@@ -298,6 +298,17 @@ zenity_tree_fill_entries (GtkTreeView  *tree_view,
   }
 }
 
+static gboolean
+zenity_mid_search_func (GtkTreeModel *model, gint column,
+                    const gchar *key, GtkTreeIter *iter,
+                    gpointer search_data)
+{
+    gchar *iter_string = NULL;
+    gtk_tree_model_get (model, iter, column, &iter_string, -1); 
+    return  ! g_strrstr (g_utf8_strdown(iter_string, -1), 
+                         g_utf8_strdown(key, -1)) != NULL;
+}
+
 static void
 zenity_cell_edited_callback (GtkCellRendererText *cell, 
                              const gchar         *path_string, 
@@ -564,6 +575,9 @@ zenity_tree (ZenityData *data, ZenityTreeData *tree_data)
 
   zenity_util_show_dialog (dialog, data->attach);
 
+  if (tree_data->mid_search)
+    gtk_tree_view_set_search_equal_func(GTK_TREE_VIEW(tree_view), (GtkTreeViewSearchEqualFunc) zenity_mid_search_func, model, NULL);
+
   if(data->timeout_delay > 0) {
     g_timeout_add_seconds (data->timeout_delay, (GSourceFunc) zenity_util_timeout_handle, dialog);
   }

src/zenity.h

@@ -132,6 +132,7 @@ typedef struct {
   gchar        *separator;
   gboolean      multi;
   gboolean      editable;
+  gboolean      mid_search;
   gchar	       *print_column;
   gchar	       *hide_column;
   const gchar **data;