[gitg] Add context menu for file in diff view

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

commit e4be0eaec6365463ac32d938f35669b88dc4a0dd
Author: Jesse van den Kieboom <jessevdk gnome org>
Date:   Fri Aug 19 10:54:28 2016 +0200

    Add context menu for file in diff view
    
    Adds:
      - Open file
      - Open containing folder
      - Copy file path
    
    https://bugzilla.gnome.org/show_bug.cgi?id=761699

 libgitg/gitg-diff-view-file.vala |  105 ++++++++++++++++++++++++++++++++++++++
 po/POTFILES.in                   |    1 +
 po/POTFILES.skip                 |    3 +-
 3 files changed, 108 insertions(+), 1 deletions(-)
---
diff --git a/libgitg/gitg-diff-view-file.vala b/libgitg/gitg-diff-view-file.vala
index 63bcc35..1d4dc00 100644
--- a/libgitg/gitg-diff-view-file.vala
+++ b/libgitg/gitg-diff-view-file.vala
@@ -154,6 +154,111 @@ class Gitg.DiffViewFile : Gtk.Grid
                }
 
                d_expander.bind_property("expanded", this, "expanded", BindingFlags.BIDIRECTIONAL);
+
+               if (repository != null && !repository.is_bare)
+               {
+                       d_expander.popup_menu.connect(expander_popup_menu);
+                       d_expander.button_press_event.connect(expander_button_press_event);
+               }
+       }
+
+       private void show_popup(Gdk.EventButton? event)
+       {
+               var menu = new Gtk.Menu();
+
+               var oldpath = delta.get_old_file().get_path();
+               var newpath = delta.get_new_file().get_path();
+
+               var open_file = new Gtk.MenuItem.with_mnemonic(_("_Open file"));
+               open_file.show();
+
+               File? location = null;
+
+               if (newpath != null && newpath != "")
+               {
+                       location = repository.get_workdir().get_child(newpath);
+               }
+               else if (oldpath != null && oldpath != "")
+               {
+                       location = repository.get_workdir().get_child(oldpath);
+               }
+
+               if (location == null)
+               {
+                       return;
+               }
+
+               open_file.activate.connect(() => {
+                       try
+                       {
+                               Gtk.show_uri(d_expander.get_screen(), location.get_uri(), Gdk.CURRENT_TIME);
+                       }
+                       catch (Error e)
+                       {
+                               stderr.printf(@"Failed to open file: $(e.message)\n");
+                       }
+               });
+
+               menu.add(open_file);
+
+               var open_folder = new Gtk.MenuItem.with_mnemonic(_("Open containing _folder"));
+               open_folder.show();
+
+               open_folder.activate.connect(() => {
+                       try
+                       {
+                               Gtk.show_uri(d_expander.get_screen(), location.get_parent().get_uri(), 
Gdk.CURRENT_TIME);
+                       }
+                       catch (Error e)
+                       {
+                               stderr.printf(@"Failed to open folder: $(e.message)\n");
+                       }
+               });
+
+               menu.add(open_folder);
+
+               var separator = new Gtk.SeparatorMenuItem();
+               separator.show();
+               menu.add(separator);
+
+               var copy_file_path = new Gtk.MenuItem.with_mnemonic(_("_Copy file path"));
+               copy_file_path.show();
+
+               copy_file_path.activate.connect(() => {
+                       var clip = d_expander.get_clipboard(Gdk.SELECTION_CLIPBOARD);
+                       clip.set_text(location.get_path(), -1);
+               });
+
+               menu.add(copy_file_path);
+
+               uint button = 0;
+               uint evtime = Gdk.CURRENT_TIME;
+
+               if (event != null)
+               {
+                       button = event.button;
+                       evtime = event.time;
+               }
+
+               menu.attach_to_widget(d_expander, null);
+               menu.popup(null, null, null, button, evtime);
+       }
+
+       private bool expander_button_press_event(Gtk.Widget widget, Gdk.EventButton? event)
+       {
+               if (event.triggers_context_menu())
+               {
+                       show_popup(event);
+                       return true;
+               }
+
+               return false;
+       }
+
+       private bool expander_popup_menu(Gtk.Widget widget)
+       {
+               show_popup(null);
+               return true;
        }
 
        public void add_hunk(Ggit.DiffHunk hunk, Gee.ArrayList<Ggit.DiffLine> lines)
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 66d056c..168dddc 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -35,6 +35,7 @@ gitg/preferences/gitg-preferences-interface.vala
 libgitg/gitg-authentication-dialog.vala
 libgitg/gitg-date.vala
 libgitg/gitg-diff-view-commit-details.vala
+libgitg/gitg-diff-view-file.vala
 libgitg/gitg-diff-view.vala
 libgitg/gitg-repository-list-box.vala
 libgitg/gitg-stage.vala
diff --git a/po/POTFILES.skip b/po/POTFILES.skip
index 9f250c4..87e7c0d 100644
--- a/po/POTFILES.skip
+++ b/po/POTFILES.skip
@@ -33,8 +33,9 @@ gitg/preferences/gitg-preferences-interface.c
 libgitg/gitg-authentication-dialog.c
 libgitg/gitg-authentication-dialog.c
 libgitg/gitg-date.c
-libgitg/gitg-diff-view.c
 libgitg/gitg-diff-view-commit-details.c
+libgitg/gitg-diff-view-file.c
+libgitg/gitg-diff-view.c
 libgitg/gitg-repository-list-box.c
 libgitg/gitg-stage.c
 plugins/diff/gitg-diff.c