[gtk+/wip/otte/clipboard: 54/102] tests: Add a new test app for GdkClipboard

[Benjamin Otte <otte src gnome org>]

commit 839e5dbb5860967bfac9fedd7a1b2fd7bcf782a0
Author: Benjamin Otte <otte redhat com>
Date:   Mon Nov 20 02:07:31 2017 +0100

    tests: Add a new test app for GdkClipboard

 tests/meson.build      |    1 +
 tests/testclipboard2.c |  167 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 168 insertions(+), 0 deletions(-)
---
diff --git a/tests/meson.build b/tests/meson.build
index e6f68ad..69f871b 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -26,6 +26,7 @@ gtk_tests = [
   ['testcairo'],
   ['testcalendar'],
   ['testclipboard'],
+  ['testclipboard2'],
   ['testcolorchooser'],
   ['testcolorchooser2'],
   ['testcombo'],
diff --git a/tests/testclipboard2.c b/tests/testclipboard2.c
new file mode 100644
index 0000000..7cabd6a
--- /dev/null
+++ b/tests/testclipboard2.c
@@ -0,0 +1,167 @@
+/*
+ * Copyright (C) 2011  Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <gtk/gtk.h>
+
+static void
+clipboard_changed_cb (GdkClipboard *clipboard,
+                      GtkWidget    *stack)
+{
+  GtkWidget *child;
+
+  gtk_stack_set_visible_child_name (GTK_STACK (stack), "info");
+
+  child = gtk_stack_get_child_by_name (GTK_STACK (stack), "image");
+  gtk_image_clear (GTK_IMAGE (child));
+}
+
+static void
+pixbuf_loaded_cb (GObject      *stream,
+                  GAsyncResult *res,
+                  gpointer      data)
+{
+  GdkPixbuf *pixbuf;
+  GError *error = NULL;
+
+  pixbuf = gdk_pixbuf_new_from_stream_finish (res, &error);
+  if (pixbuf == NULL)
+    {
+      g_print ("%s\n", error->message);
+      g_error_free (error);
+      return;
+    }
+
+  gtk_image_set_from_pixbuf (data, pixbuf);
+  g_object_unref (pixbuf);
+}
+
+static void
+visible_child_changed_cb (GtkWidget    *stack,
+                          GParamSpec   *pspec,
+                          GdkClipboard *clipboard)
+{
+  const char *visible_child = gtk_stack_get_visible_child_name (GTK_STACK (stack));
+
+  if (visible_child == NULL)
+    { 
+      /* nothing to do here but avoiding crashes in g_str_equal() */
+    }
+  else if (g_str_equal (visible_child, "image"))
+    {
+      GtkWidget *image = gtk_stack_get_child_by_name (GTK_STACK (stack), "image");
+      GdkContentFormats *formats;
+      GInputStream *stream;
+
+      formats = gdk_clipboard_get_formats (clipboard);
+      if (gdk_content_formats_contain_mime_type (formats, "image/png"))
+        stream = gdk_clipboard_read (clipboard, "image/png");
+      else
+        stream = NULL;
+      if (stream)
+        {
+          gdk_pixbuf_new_from_stream_async (stream, NULL, pixbuf_loaded_cb, image);
+          g_object_unref (stream);
+        }
+    }
+}
+                
+static void
+clipboard_formats_change_cb (GdkClipboard *clipboard,
+                             GParamSpec   *pspec,
+                             GtkWidget    *label)
+{
+  char *s;
+
+  s = gdk_content_formats_to_string (gdk_clipboard_get_formats (clipboard));
+  gtk_label_set_text (GTK_LABEL (label), s);
+  g_free (s);
+}
+
+static GtkWidget *
+get_contents_widget (GdkClipboard *clipboard)
+{
+  GtkWidget *stack, *child;
+
+  stack = gtk_stack_new ();
+  gtk_widget_set_hexpand (stack, TRUE);
+  gtk_widget_set_vexpand (stack, TRUE);
+  g_signal_connect (stack, "notify::visible-child", G_CALLBACK (visible_child_changed_cb), clipboard);
+  g_signal_connect (clipboard, "changed", G_CALLBACK (clipboard_changed_cb), stack);
+
+  child = gtk_label_new (NULL);
+  gtk_label_set_line_wrap (GTK_LABEL (child), TRUE);
+  g_signal_connect (clipboard, "notify::formats", G_CALLBACK (clipboard_formats_change_cb), child);
+  clipboard_formats_change_cb (clipboard, NULL, child);
+  gtk_stack_add_titled (GTK_STACK (stack), child, "info", "Info");
+
+  child = gtk_image_new ();
+  gtk_stack_add_titled (GTK_STACK (stack), child, "image", "Image");
+
+  return stack;
+}
+
+static GtkWidget *
+get_clipboard_widget (GdkClipboard *clipboard,
+                      const char   *name)
+{
+  GtkWidget *box, *stack, *switcher;
+
+  box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+  gtk_container_add (GTK_CONTAINER (box), gtk_label_new (name));
+  switcher = gtk_stack_switcher_new ();
+  gtk_container_add (GTK_CONTAINER (box), switcher);
+  stack = get_contents_widget (clipboard);
+  gtk_container_add (GTK_CONTAINER (box), stack);
+  gtk_stack_switcher_set_stack (GTK_STACK_SWITCHER (switcher), GTK_STACK (stack));
+
+  return box;
+}
+
+static GtkWidget *
+get_window_contents (GdkDisplay *display)
+{
+  GtkWidget *box;
+
+  box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
+  gtk_box_set_homogeneous (GTK_BOX (box), TRUE);
+  gtk_container_add (GTK_CONTAINER (box),
+                     get_clipboard_widget (gdk_display_get_clipboard (display),
+                                           "Clipboard"));
+  gtk_container_add (GTK_CONTAINER (box),
+                     get_clipboard_widget (gdk_display_get_primary_clipboard (display),
+                                           "Primary Clipboard"));
+
+  return box;
+}
+
+int
+main (int argc, char **argv)
+{
+  GtkWidget *window;
+
+  gtk_init ();
+
+  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+  g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL);
+  gtk_container_add (GTK_CONTAINER (window), get_window_contents (gtk_widget_get_display (window)));
+
+  gtk_widget_show (window);
+
+  gtk_main ();
+
+  return 0;
+}