[gitg] Implement hunk select/deselect

[Jesse van den Kieboom <jessevdk src gnome org>]

commit 36d63f18891b1ad224ee1b5b615a8ba30b8fc440
Author: Jesse van den Kieboom <jessevdk gnome org>
Date:   Sun Dec 20 19:10:32 2015 +0100

    Implement hunk select/deselect

 libgitg/gitg-diff-view-file-selectable.vala |   32 +++++++++++++++++++++++---
 vapi/gtksourceview-3.0.vapi                 |    4 +-
 2 files changed, 30 insertions(+), 6 deletions(-)
---
diff --git a/libgitg/gitg-diff-view-file-selectable.vala b/libgitg/gitg-diff-view-file-selectable.vala
index 14e5d6e..83653b4 100644
--- a/libgitg/gitg-diff-view-file-selectable.vala
+++ b/libgitg/gitg-diff-view-file-selectable.vala
@@ -361,6 +361,22 @@ class Gitg.DiffViewFileSelectable : Object
                }
        }
 
+       private void update_selection_hunk(Gtk.TextIter iter, bool select)
+       {
+               var end = iter;
+
+               end.forward_line();
+
+               var buffer = source_view.buffer as Gtk.SourceBuffer;
+               
+               if (!buffer.forward_iter_to_source_mark(ref end, "header"))
+               {
+                       end.forward_to_end();
+               }
+
+               update_selection_range(iter, end, select);
+       }
+
        private bool button_press_event_on_view(Gdk.EventButton event)
        {
                if (event.button != 1)
@@ -375,14 +391,22 @@ class Gitg.DiffViewFileSelectable : Object
                        return false;
                }
 
-               if ((event.state & Gdk.ModifierType.MOD1_MASK) != 0)
+               var select = (event.state & Gdk.ModifierType.MOD1_MASK) == 0;
+
+               if (get_line_is_hunk(iter))
                {
-                       d_selection_mode = DiffSelectionMode.DESELECTING;
+                       update_selection_hunk(iter, select);
+                       return true;
                }
-               else
+
+               if (select)
                {
                        d_selection_mode = DiffSelectionMode.SELECTING;
                }
+               else
+               {
+                       d_selection_mode = DiffSelectionMode.DESELECTING;
+               }
 
                var buffer = source_view.buffer;
 
@@ -456,7 +480,7 @@ class Gitg.DiffViewFileSelectable : Object
                }
                else
                {
-                       something_selected = (buffer as Gtk.SourceBuffer).forward_iter_to_source_mark(iter, 
d_selection_category);
+                       something_selected = (buffer as Gtk.SourceBuffer).forward_iter_to_source_mark(ref 
iter, d_selection_category);
                }
 
                if (something_selected != has_selection)
diff --git a/vapi/gtksourceview-3.0.vapi b/vapi/gtksourceview-3.0.vapi
index 8961b5e..ecbf84e 100644
--- a/vapi/gtksourceview-3.0.vapi
+++ b/vapi/gtksourceview-3.0.vapi
@@ -13,13 +13,13 @@ namespace Gtk {
        public class SourceBuffer : Gtk.TextBuffer {
                [CCode (has_construct_function = false)]
                public SourceBuffer (Gtk.TextTagTable? table);
-               public bool backward_iter_to_source_mark (Gtk.TextIter iter, string? category);
+               public bool backward_iter_to_source_mark (ref Gtk.TextIter iter, string? category);
                public void begin_not_undoable_action ();
                public void change_case (Gtk.SourceChangeCaseType case_type, Gtk.TextIter start, Gtk.TextIter 
end);
                public unowned Gtk.SourceMark create_source_mark (string? name, string category, Gtk.TextIter 
where);
                public void end_not_undoable_action ();
                public void ensure_highlight (Gtk.TextIter start, Gtk.TextIter end);
-               public bool forward_iter_to_source_mark (Gtk.TextIter iter, string? category);
+               public bool forward_iter_to_source_mark (ref Gtk.TextIter iter, string? category);
                [CCode (array_length = false, array_null_terminated = true)]
                public string[] get_context_classes_at_iter (Gtk.TextIter iter);
                public bool get_highlight_matching_brackets ();