[gnome-flashback] input-sources: add GfInputSourcesButton

[Alberts Muktupāvels <muktupavels src gnome org>]

commit d55a828b3e37ece51c3a70f2c0f277fca48a082c
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sat Feb 8 18:11:07 2020 +0200

    input-sources: add GfInputSourcesButton

 gnome-flashback/libinput-sources/Makefile.am       |   2 +
 .../libinput-sources/gf-input-sources-button.c     | 195 +++++++++++++++++++++
 .../libinput-sources/gf-input-sources-button.h     |  34 ++++
 3 files changed, 231 insertions(+)
---
diff --git a/gnome-flashback/libinput-sources/Makefile.am b/gnome-flashback/libinput-sources/Makefile.am
index eb58e8a..2b84f9e 100644
--- a/gnome-flashback/libinput-sources/Makefile.am
+++ b/gnome-flashback/libinput-sources/Makefile.am
@@ -34,6 +34,8 @@ libinput_sources_la_SOURCES = \
        gf-input-source-xkb.h \
        gf-input-source.c \
        gf-input-source.h \
+       gf-input-sources-button.c \
+       gf-input-sources-button.h \
        gf-input-sources.c \
        gf-input-sources.h \
        gf-input-source-manager.c \
diff --git a/gnome-flashback/libinput-sources/gf-input-sources-button.c 
b/gnome-flashback/libinput-sources/gf-input-sources-button.c
new file mode 100644
index 0000000..e860ca2
--- /dev/null
+++ b/gnome-flashback/libinput-sources/gf-input-sources-button.c
@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2020 Alberts Muktupāvels
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+#include "gf-input-sources-button.h"
+
+struct _GfInputSourcesButton
+{
+  GtkButton             parent;
+
+  GfInputSourceManager *manager;
+};
+
+enum
+{
+  PROP_0,
+
+  PROP_MANAGER,
+
+  LAST_PROP
+};
+
+static GParamSpec *button_properties[LAST_PROP] = { NULL };
+
+G_DEFINE_TYPE (GfInputSourcesButton, gf_input_sources_button, GTK_TYPE_BUTTON)
+
+static void
+update_button (GfInputSourcesButton *self)
+{
+  GfInputSource *source;
+  const char *short_name;
+  const char *display_name;
+
+  source = gf_input_source_manager_get_current_source (self->manager);
+  if (source == NULL)
+    return;
+
+  short_name = gf_input_source_get_short_name (source);
+  gtk_button_set_label (GTK_BUTTON (self), short_name);
+
+  display_name = gf_input_source_get_display_name (source);
+  gtk_widget_set_tooltip_text (GTK_WIDGET (self), display_name);
+}
+
+static void
+current_source_changed_cb (GfInputSourceManager *manager,
+                           GfInputSource        *old_source,
+                           GfInputSourcesButton *self)
+{
+  update_button (self);
+}
+
+static void
+sources_changed_cb (GfInputSourceManager *manager,
+                    GfInputSourcesButton *self)
+{
+  GList *input_sources;
+
+  input_sources = gf_input_source_manager_get_input_sources (manager);
+
+  if (g_list_length (input_sources) <= 1)
+    {
+      gtk_widget_hide (GTK_WIDGET (self));
+      return;
+    }
+
+  gtk_widget_show (GTK_WIDGET (self));
+  update_button (self);
+}
+
+static void
+gf_input_sources_button_constructed (GObject *object)
+{
+  GfInputSourcesButton *self;
+
+  self = GF_INPUT_SOURCES_BUTTON (object);
+
+  G_OBJECT_CLASS (gf_input_sources_button_parent_class)->constructed (object);
+
+  g_signal_connect (self->manager, "sources-changed",
+                    G_CALLBACK (sources_changed_cb),
+                    self);
+
+  g_signal_connect (self->manager, "current-source-changed",
+                    G_CALLBACK (current_source_changed_cb),
+                    self);
+
+  sources_changed_cb (self->manager, self);
+}
+
+static void
+gf_input_sources_button_dispose (GObject *object)
+{
+  GfInputSourcesButton *self;
+
+  self = GF_INPUT_SOURCES_BUTTON (object);
+
+  g_clear_object (&self->manager);
+
+  G_OBJECT_CLASS (gf_input_sources_button_parent_class)->dispose (object);
+}
+
+static void
+gf_input_sources_button_set_property (GObject      *object,
+                                      guint         property_id,
+                                      const GValue *value,
+                                      GParamSpec   *pspec)
+{
+  GfInputSourcesButton *self;
+
+  self = GF_INPUT_SOURCES_BUTTON (object);
+
+  switch (property_id)
+    {
+      case PROP_MANAGER:
+        g_assert (self->manager == NULL);
+        self->manager = g_value_dup_object (value);
+        break;
+
+      default:
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+        break;
+    }
+}
+
+static void
+gf_input_sources_button_clicked (GtkButton *button)
+{
+  GfInputSourcesButton *self;
+
+  self = GF_INPUT_SOURCES_BUTTON (button);
+
+  gf_input_source_manager_active_next_source (self->manager);
+}
+
+static void
+install_properties (GObjectClass *object_class)
+{
+  button_properties[PROP_MANAGER] =
+    g_param_spec_object ("manager",
+                         "manager",
+                         "manager",
+                         GF_TYPE_INPUT_SOURCE_MANAGER,
+                         G_PARAM_CONSTRUCT_ONLY |
+                         G_PARAM_WRITABLE |
+                         G_PARAM_STATIC_STRINGS);
+
+  g_object_class_install_properties (object_class, LAST_PROP, button_properties);
+}
+
+static void
+gf_input_sources_button_class_init (GfInputSourcesButtonClass *self_class)
+{
+  GObjectClass *object_class;
+  GtkButtonClass *button_class;
+
+  object_class = G_OBJECT_CLASS (self_class);
+  button_class = GTK_BUTTON_CLASS (self_class);
+
+  object_class->constructed = gf_input_sources_button_constructed;
+  object_class->dispose = gf_input_sources_button_dispose;
+  object_class->set_property = gf_input_sources_button_set_property;
+
+  button_class->clicked = gf_input_sources_button_clicked;
+
+  install_properties (object_class);
+}
+
+static void
+gf_input_sources_button_init (GfInputSourcesButton *self)
+{
+}
+
+GtkWidget *
+gf_input_sources_button_new (GfInputSourceManager *manager)
+{
+  return g_object_new (GF_TYPE_INPUT_SOURCES_BUTTON,
+                       "focus-on-click", FALSE,
+                       "manager", manager,
+                       NULL);
+}
diff --git a/gnome-flashback/libinput-sources/gf-input-sources-button.h 
b/gnome-flashback/libinput-sources/gf-input-sources-button.h
new file mode 100644
index 0000000..ee9974b
--- /dev/null
+++ b/gnome-flashback/libinput-sources/gf-input-sources-button.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2020 Alberts Muktupāvels
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GF_INPUT_SOURCES_BUTTON_H
+#define GF_INPUT_SOURCES_BUTTON_H
+
+#include <gtk/gtk.h>
+#include "gf-input-source-manager.h"
+
+G_BEGIN_DECLS
+
+#define GF_TYPE_INPUT_SOURCES_BUTTON (gf_input_sources_button_get_type ())
+G_DECLARE_FINAL_TYPE (GfInputSourcesButton, gf_input_sources_button,
+                      GF, INPUT_SOURCES_BUTTON, GtkButton)
+
+GtkWidget *gf_input_sources_button_new (GfInputSourceManager *manager);
+
+G_END_DECLS
+
+#endif