[latexila] Search: print match infos

[Sébastien Wilmet <swilmet src gnome org>]

commit 1ec1e8d237fdae3022df94638663beb795e3b96f
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue Oct 8 00:14:33 2013 +0200

    Search: print match infos
    
    Print the current match position, and the total number of matches.
    In gedit these numbers are integrated in the text entry, with a
    GdTaggedEntry. But I'm lazy, I don't like doing two times the same
    thing. So here the information is printed in a simple label, on the
    right of the close button. The advantage with the label is that the
    information is clearer: "Match 3 of 10", "10 matches" and "Not found".

 src/search.vala |  106 ++++++++++++++++++++++++++++++++++++++++++++++--------
 1 files changed, 90 insertions(+), 16 deletions(-)
---
diff --git a/src/search.vala b/src/search.vala
index e4054ed..e16ca0b 100644
--- a/src/search.vala
+++ b/src/search.vala
@@ -105,6 +105,8 @@ public class SearchAndReplace : GLib.Object
     private SearchEntry _entry_find;
     private SearchEntry _entry_replace;
 
+    private Label _info_label;
+
     private SourceSearchSettings _search_settings;
     private SourceSearchContext? _search_context = null;
 
@@ -157,6 +159,11 @@ public class SearchAndReplace : GLib.Object
         button_previous.sensitive = false;
         button_next.sensitive = false;
 
+        /* Information label at the right of the close button */
+        _info_label = new Label (null);
+        _info_label.set_margin_left (12);
+        find_grid.add (_info_label);
+
         /* Replace entry */
         _replace_grid = new Grid ();
         _replace_grid.set_orientation (Orientation.HORIZONTAL);
@@ -381,7 +388,7 @@ public class SearchAndReplace : GLib.Object
     public void hide ()
     {
         _main_window.notify["active-document"].disconnect (connect_active_document);
-        _search_context = null;
+        destroy_search_context ();
 
         _main_grid.hide ();
 
@@ -389,29 +396,96 @@ public class SearchAndReplace : GLib.Object
             _main_window.active_view.grab_focus ();
     }
 
+    private void destroy_search_context ()
+    {
+        if (_search_context == null)
+            return;
+
+        SourceBuffer buffer = _search_context.get_buffer ();
+        buffer.mark_set.disconnect (mark_set_cb);
+
+        _search_context = null;
+    }
+
     private void connect_active_document ()
     {
-        if (_main_window.active_document == null)
+        destroy_search_context ();
+
+        Document doc = _main_window.active_document;
+
+        if (doc == null)
+            return;
+
+        _search_context = new SourceSearchContext (doc, _search_settings);
+
+        _search_context.notify["occurrences-count"].connect (() =>
+        {
+            if (_search_context.occurrences_count == 0 &&
+                _search_settings.get_search_text () != null)
+                ErrorEntry.add_error (_entry_find);
+
+            else if (_search_context.occurrences_count >= 0)
+                ErrorEntry.remove_error (_entry_find);
+
+            update_info_label ();
+        });
+
+        bool readonly = _main_window.active_document.readonly;
+        _replace_grid.set_sensitive (! readonly);
+
+        doc.mark_set.connect (mark_set_cb);
+    }
+
+    private void mark_set_cb (TextBuffer buffer, TextIter location, TextMark mark)
+    {
+        if (mark == buffer.get_insert () || mark == buffer.get_selection_bound ())
         {
-            _search_context = null;
+            update_info_label ();
         }
-        else
+    }
+
+    private void update_info_label ()
+    {
+        if (_search_context == null ||
+            _search_settings.get_search_text () == null)
         {
-            _search_context = new SourceSearchContext (_main_window.active_document,
-                _search_settings);
+            _info_label.set_text ("");
+            return;
+        }
 
-            _search_context.notify["occurrences-count"].connect (() =>
-            {
-                if (_search_context.occurrences_count == 0 &&
-                    _search_settings.get_search_text () != null)
-                    ErrorEntry.add_error (_entry_find);
+        int count = _search_context.occurrences_count;
+
+        if (count == -1)
+        {
+            return;
+        }
+
+        if (count == 0)
+        {
+            _info_label.set_text (_("Not found"));
+            return;
+        }
 
-                else if (_search_context.occurrences_count >= 0)
-                    ErrorEntry.remove_error (_entry_find);
-            });
+        TextBuffer buffer = _search_context.get_buffer ();
+        TextIter start;
+        TextIter end;
 
-            bool readonly = _main_window.active_document.readonly;
-            _replace_grid.set_sensitive (! readonly);
+        buffer.get_selection_bounds (out start, out end);
+
+        int pos = _search_context.get_occurrence_position (start, end);
+
+        if (pos > 0)
+        {
+            /* Translators: the first %d is the position of the current search occurrence,
+             * and the second %d is the total number of search occurrences.
+             */
+            _info_label.set_text (_("Match %d of %d").printf (pos, count));
+        }
+        else
+        {
+            /* Translators: %d is the total number of search occurrences. */
+            string text = ngettext ("%d match", "%d matches", count).printf (count);
+            _info_label.set_text (text);
         }
     }