[gnome-builder/wip/libide] libide: add movement to find matching char on current line

[Christian Hergert <chergert src gnome org>]

commit 7784fdc69a5dff06c5c90661a3fae7ff64a36697
Author: Christian Hergert <christian hergert me>
Date:   Tue Mar 10 20:37:39 2015 -0700

    libide: add movement to find matching char on current line
    
    This needs a movement char, which can be retrieved using the
    IdeSourceview::capture-modifier signal.

 libide/ide-source-view-movements.c |   53 ++++++++++++++++++++++++++++++++++++
 libide/ide-source-view.h           |    3 ++
 2 files changed, 56 insertions(+), 0 deletions(-)
---
diff --git a/libide/ide-source-view-movements.c b/libide/ide-source-view-movements.c
index 9495812..86096c1 100644
--- a/libide/ide-source-view-movements.c
+++ b/libide/ide-source-view-movements.c
@@ -1179,6 +1179,49 @@ ide_source_view_movements_next_unmatched (Movement *mv,
   g_assert_not_reached ();
 }
 
+static gboolean
+find_match (gunichar ch,
+            gpointer data)
+{
+  Movement *mv = data;
+
+  return (mv->modifier == ch);
+}
+
+static void
+ide_source_view_movements_next_match_modifier (Movement *mv)
+{
+  GtkTextIter insert;
+  GtkTextIter bounds;
+
+  bounds = insert = mv->insert;
+  gtk_text_iter_forward_to_line_end (&bounds);
+
+  if (gtk_text_iter_forward_find_char (&insert, find_match, mv, &bounds))
+    {
+      if (!mv->exclusive)
+        gtk_text_iter_forward_char (&insert);
+      mv->insert = insert;
+    }
+}
+
+static void
+ide_source_view_movements_previous_match_modifier (Movement *mv)
+{
+  GtkTextIter insert;
+  GtkTextIter bounds;
+
+  bounds = insert = mv->insert;
+  gtk_text_iter_set_line_offset (&bounds, 0);
+
+  if (gtk_text_iter_backward_find_char (&insert, find_match, mv, &bounds))
+    {
+      if (!mv->exclusive)
+        gtk_text_iter_forward_char (&insert);
+      mv->insert = insert;
+    }
+}
+
 void
 _ide_source_view_apply_movement (IdeSourceView         *self,
                                  IdeSourceViewMovement  movement,
@@ -1425,6 +1468,16 @@ _ide_source_view_apply_movement (IdeSourceView         *self,
         ide_source_view_movements_next_unmatched (&mv, ')', '(');
       break;
 
+    case IDE_SOURCE_VIEW_MOVEMENT_NEXT_MATCH_MODIFIER:
+      for (i = MAX (1, mv.count); i > 0; i--)
+        ide_source_view_movements_next_match_modifier (&mv);
+      break;
+
+    case IDE_SOURCE_VIEW_MOVEMENT_PREVIOUS_MATCH_MODIFIER:
+      for (i = MAX (1, mv.count); i > 0; i--)
+        ide_source_view_movements_previous_match_modifier (&mv);
+      break;
+
     default:
       g_return_if_reached ();
     }
diff --git a/libide/ide-source-view.h b/libide/ide-source-view.h
index ababfda..d887492 100644
--- a/libide/ide-source-view.h
+++ b/libide/ide-source-view.h
@@ -186,6 +186,9 @@ typedef enum
 
   IDE_SOURCE_VIEW_MOVEMENT_PREVIOUS_UNMATCHED_PAREN,
   IDE_SOURCE_VIEW_MOVEMENT_NEXT_UNMATCHED_PAREN,
+
+  IDE_SOURCE_VIEW_MOVEMENT_NEXT_MATCH_MODIFIER,
+  IDE_SOURCE_VIEW_MOVEMENT_PREVIOUS_MATCH_MODIFIER,
 } IdeSourceViewMovement;
 
 G_DEFINE_AUTOPTR_CLEANUP_FUNC (IdeSourceView, g_object_unref)