[gnome-builder/wip/beniofel/media-controls] Add media controller plugin (spotify only for now)

[Ben Iofel <beniofel src gnome org>]

commit 9208047b68a5c132a71c5701330415c4687201fe
Author: Ben Iofel <iofelben gmail com>
Date:   Wed Jan 20 00:19:23 2016 -0500

    Add media controller plugin (spotify only for now)

 configure.ac                                 |    1 +
 plugins/Makefile.am                          |    1 +
 plugins/media-controls/Makefile.am           |   37 ++++++++++++++
 plugins/media-controls/configure.ac          |   15 ++++++
 plugins/media-controls/media-controls.plugin |    8 +++
 plugins/media-controls/media-controls.vala   |   67 ++++++++++++++++++++++++++
 6 files changed, 129 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 66b8bb3..72f83a3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -241,6 +241,7 @@ m4_include([plugins/gnome-code-assistance/configure.ac])
 m4_include([plugins/html-completion/configure.ac])
 m4_include([plugins/html-preview/configure.ac])
 m4_include([plugins/jedi/configure.ac])
+m4_include([plugins/media-controls/configure.ac])
 m4_include([plugins/mingw/configure.ac])
 m4_include([plugins/project-tree/configure.ac])
 m4_include([plugins/python-gi-imports-completion/configure.ac])
diff --git a/plugins/Makefile.am b/plugins/Makefile.am
index 7e9628a..2de209e 100644
--- a/plugins/Makefile.am
+++ b/plugins/Makefile.am
@@ -17,6 +17,7 @@ SUBDIRS = \
        jedi \
        project-tree \
        python-gi-imports-completion \
+       media-controls \
        mingw \
        python-pack \
        support \
diff --git a/plugins/media-controls/Makefile.am b/plugins/media-controls/Makefile.am
new file mode 100644
index 0000000..5471cde
--- /dev/null
+++ b/plugins/media-controls/Makefile.am
@@ -0,0 +1,37 @@
+if ENABLE_MEDIA_CONTROLS_PLUGIN
+
+EXTRA_DIST = $(plugin_DATA)
+
+plugindir = $(libdir)/gnome-builder/plugins
+plugin_LTLIBRARIES = libmedia-controls-plugin.la
+dist_plugin_DATA = media-controls.plugin
+
+libmedia_controls_plugin_la_SOURCES = \
+    media-controls.vala
+
+libmedia_controls_plugin_la_VALAFLAGS = \
+       --vapidir $(top_builddir)/libide \
+    --pkg gtk+-3.0 \
+    --pkg gio-2.0 \
+    --pkg libide-1.0 \
+    --pkg libpeas-1.0
+
+libmedia_controls_plugin_la_CFLAGS = \
+       -DG_LOG_DOMAIN=\"media-controls-plugin\" \
+       $(LIBIDE_CFLAGS) \
+       $(VALA_CFLAGS) \
+       -I$(top_srcdir)/libide \
+       -I$(top_srcdir)/contrib/egg \
+    -w
+
+libmedia_controls_plugin_la_LDFLAGS = \
+       $(OPTIMIZE_LDFLAGS) \
+       $(VALA_LIBS) \
+    -avoid-version \
+    -module
+
+include $(top_srcdir)/plugins/Makefile.plugin
+
+endif
+
+-include $(top_srcdir)/git.mk
diff --git a/plugins/media-controls/configure.ac b/plugins/media-controls/configure.ac
new file mode 100644
index 0000000..2827658
--- /dev/null
+++ b/plugins/media-controls/configure.ac
@@ -0,0 +1,15 @@
+AC_ARG_ENABLE([media-controls-plugin],
+              [AS_HELP_STRING([--enable-media-controls-plugin=@<:@auto/yes/no@:>@],
+                              [Build with the media controls plugin.])],
+              [enable_media_controls_plugin=$enableval],
+              [enable_media_controls_plugin=auto])
+
+AS_IF([test x$enable_media_controls_plugin = xauto],
+             [enable_media_controls_plugin=yes],
+             [enable_media_controls_plugin=no]
+)
+
+AM_CONDITIONAL(ENABLE_MEDIA_CONTROLS_PLUGIN, test x$enable_media_controls_plugin = xyes)
+
+# Ensure our makefile is generated by autoconf
+AC_CONFIG_FILES([plugins/media-controls/Makefile])
diff --git a/plugins/media-controls/media-controls.plugin b/plugins/media-controls/media-controls.plugin
new file mode 100644
index 0000000..8856872
--- /dev/null
+++ b/plugins/media-controls/media-controls.plugin
@@ -0,0 +1,8 @@
+[Plugin]
+Module=media-controls-plugin
+Name=Media Controls
+Description=Provides media control buttons
+Authors=Ben Iofel <iofelben gmail com>
+Copyright=Copyright © 2016 Ben Iofel
+Builtin=true
+Depends=editor
diff --git a/plugins/media-controls/media-controls.vala b/plugins/media-controls/media-controls.vala
new file mode 100644
index 0000000..eb75a43
--- /dev/null
+++ b/plugins/media-controls/media-controls.vala
@@ -0,0 +1,67 @@
+[DBus (name="org.mpris.MediaPlayer2.Player")]
+public interface Mpris : Object {
+       // public abstract string playback_status { get; }
+
+       public abstract void previous () throws IOError;
+       public abstract void play_pause () throws IOError;
+       public abstract void next () throws IOError;
+}
+
+public class Ide.MediaControls : GLib.Object, Ide.WorkbenchAddin {
+       public bool can_open (Ide.Uri uri, string? content_type, out int priority) {
+               return false;
+       }
+
+       public string get_id () {
+               return typeof (Ide.MediaControls).name ();
+       }
+
+       public void load (Ide.Workbench workbench) {
+               var _titlebar = workbench.get_perspective_by_name ("editor").get_titlebar ();
+               if (_titlebar is Gtk.HeaderBar) {
+                       var titlebar = (Gtk.HeaderBar) _titlebar;
+                       var box = new Gtk.Box (Gtk.Orientation.HORIZONTAL, 0);
+                       box.get_style_context ().add_class ("linked");
+
+                       var back = new Gtk.Button.from_icon_name ("media-seek-backward-symbolic");
+                       var play = new Gtk.Button.from_icon_name ("media-playback-start-symbolic");
+                       var forward = new Gtk.Button.from_icon_name ("media-seek-forward-symbolic");
+
+                       Mpris? mpris = null;
+                       Bus.get_proxy.begin<Mpris> (BusType.SESSION,
+                                                                               
"org.mpris.MediaPlayer2.spotify",
+                                                                               "/org/mpris/MediaPlayer2",
+                                                                               0, null,
+                                                                               (obj, res) => {
+                               mpris = Bus.get_proxy.end (res);
+                               back.clicked.connect (button => mpris.previous ());
+                               play.clicked.connect (button => mpris.play_pause ());
+                               forward.clicked.connect (button => mpris.next ());
+                       });
+
+                       box.add (back);
+                       box.add (play);
+                       box.add (forward);
+
+                       box.show_all ();
+                       titlebar.pack_end (box);
+               }
+       }
+
+       public async bool open_async (Ide.Uri uri, string content_type, Cancellable? cancel) throws Error {
+               assert_not_reached ();
+               return false;
+       }
+
+       public void unload (Ide.Workbench workbench) {
+               // TODO
+       }
+}
+
+[ModuleInit]
+public void peas_register_types (TypeModule module)
+{
+       Peas.ObjectModule peas = (Peas.ObjectModule)module;
+
+       peas.register_extension_type (typeof (Ide.WorkbenchAddin), typeof (Ide.MediaControls));
+}