[gtksourceview] Add test-space-drawing to test the GtkSourceTag property

[Sébastien Wilmet <swilmet src gnome org>]

commit 3b608c35a68a02a02840039b2f80f157bf14aed2
Author: Sébastien Wilmet <sebastien wilmet uclouvain be>
Date:   Mon Sep 21 13:42:40 2015 +0200

    Add test-space-drawing to test the GtkSourceTag property
    
    It isn't a unit test, just a simple GTK+ app. The GtkSourceView's
    draw-spaces property can be changed (as a boolean) and the
    GtkSourceTag's draw-spaces-set and draw-spaces properties can be changed
    individually.
    
    The test shows that there is a problem when changing the GtkSourceTag
    properties, the view is not redrawn.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=744179

 tests/Makefile.am          |    3 +
 tests/test-space-drawing.c |  159 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 162 insertions(+), 0 deletions(-)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 344fe06..660a8dc 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -55,6 +55,9 @@ test_search_LDADD =                                           \
 TEST_PROGS += test-search-performances
 test_search_performances_SOURCES = test-search-performances.c
 
+TEST_PROGS += test-space-drawing
+test_space_drawing_SOURCES = test-space-drawing.c
+
 TEST_PROGS += test-undo-manager-performances
 test_undo_manager_performances_SOURCES = test-undo-manager-performances.c
 
diff --git a/tests/test-space-drawing.c b/tests/test-space-drawing.c
new file mode 100644
index 0000000..742fd58
--- /dev/null
+++ b/tests/test-space-drawing.c
@@ -0,0 +1,159 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; coding: utf-8 -*-
+ * test-space-drawing.c
+ * This file is part of GtkSourceView
+ *
+ * Copyright (C) 2015 - Université Catholique de Louvain
+ *
+ * GtkSourceView is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * GtkSourceView 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Author: Sébastien Wilmet
+ */
+
+#include <gtksourceview/gtksource.h>
+
+static void
+fill_buffer (GtkTextBuffer *buffer,
+            GtkTextTag    *tag)
+{
+       GtkTextIter iter;
+
+       gtk_text_buffer_set_text (buffer, "", 0);
+
+       gtk_text_buffer_get_start_iter (buffer, &iter);
+       gtk_text_buffer_insert (buffer, &iter,
+                               "---\n"
+                               "\tText without draw-spaces tag.\n"
+                               "\tNon-breaking whitespace: .\n"
+                               "\tTrailing spaces.\t  \n"
+                               "---\n\n",
+                               -1);
+
+       gtk_text_buffer_insert_with_tags (buffer, &iter,
+                                         "---\n"
+                                         "\tText with draw-spaces tag.\n"
+                                         "\tNon-breaking whitespace: .\n"
+                                         "\tTrailing spaces.\t  \n"
+                                         "---",
+                                         -1,
+                                         tag,
+                                         NULL);
+}
+
+static void
+gsv_checkbutton_toggled_cb (GtkToggleButton *gsv_checkbutton,
+                           GtkSourceView   *view)
+{
+       if (gtk_toggle_button_get_active (gsv_checkbutton))
+       {
+               gtk_source_view_set_draw_spaces (view, GTK_SOURCE_DRAW_SPACES_ALL);
+       }
+       else
+       {
+               gtk_source_view_set_draw_spaces (view, 0);
+       }
+}
+
+static void
+create_window (void)
+{
+       GtkWidget *window;
+       GtkWidget *hgrid;
+       GtkWidget *panel_grid;
+       GtkWidget *scrolled_window;
+       GtkWidget *gsv_checkbutton;
+       GtkWidget *tag_set_checkbutton;
+       GtkWidget *tag_checkbutton;
+       GtkSourceView *view;
+       GtkSourceBuffer *buffer;
+       GtkTextTag *tag;
+
+       window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+       gtk_window_set_default_size (GTK_WINDOW (window), 800, 600);
+       g_signal_connect (window, "destroy", gtk_main_quit, NULL);
+
+       hgrid = gtk_grid_new ();
+       gtk_orientable_set_orientation (GTK_ORIENTABLE (hgrid), GTK_ORIENTATION_HORIZONTAL);
+
+       view = GTK_SOURCE_VIEW (gtk_source_view_new ());
+
+       g_object_set (view,
+                     "expand", TRUE,
+                     NULL);
+
+       gtk_text_view_set_monospace (GTK_TEXT_VIEW (view), TRUE);
+
+       buffer = GTK_SOURCE_BUFFER (gtk_text_view_get_buffer (GTK_TEXT_VIEW (view)));
+
+       tag = gtk_source_buffer_create_tag (buffer,
+                                           NULL,
+                                           "draw-spaces", FALSE,
+                                           NULL);
+
+       fill_buffer (GTK_TEXT_BUFFER (buffer), tag);
+
+       gtk_source_view_set_draw_spaces (view, GTK_SOURCE_DRAW_SPACES_ALL);
+
+       panel_grid = gtk_grid_new ();
+       gtk_orientable_set_orientation (GTK_ORIENTABLE (panel_grid), GTK_ORIENTATION_VERTICAL);
+       gtk_container_add (GTK_CONTAINER (hgrid), panel_grid);
+
+       gtk_grid_set_row_spacing (GTK_GRID (panel_grid), 6);
+       g_object_set (panel_grid,
+                     "margin", 6,
+                     NULL);
+
+       gsv_checkbutton = gtk_check_button_new_with_label ("GtkSourceView draw-spaces");
+       gtk_container_add (GTK_CONTAINER (panel_grid), gsv_checkbutton);
+       gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (gsv_checkbutton), TRUE);
+       g_signal_connect (gsv_checkbutton,
+                         "toggled",
+                         G_CALLBACK (gsv_checkbutton_toggled_cb),
+                         view);
+
+       tag_set_checkbutton = gtk_check_button_new_with_label ("GtkSourceTag draw-spaces-set");
+       gtk_container_add (GTK_CONTAINER (panel_grid), tag_set_checkbutton);
+       gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (tag_set_checkbutton), TRUE);
+       g_object_bind_property (tag_set_checkbutton, "active",
+                               tag, "draw-spaces-set",
+                               G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
+
+       tag_checkbutton = gtk_check_button_new_with_label ("GtkSourceTag draw-spaces");
+       gtk_container_add (GTK_CONTAINER (panel_grid), tag_checkbutton);
+       gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (tag_checkbutton), FALSE);
+       g_object_bind_property (tag_checkbutton, "active",
+                               tag, "draw-spaces",
+                               G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
+
+       scrolled_window = gtk_scrolled_window_new (NULL, NULL);
+       gtk_container_add (GTK_CONTAINER (scrolled_window), GTK_WIDGET (view));
+       gtk_container_add (GTK_CONTAINER (hgrid), scrolled_window);
+
+       gtk_container_add (GTK_CONTAINER (window), hgrid);
+
+       gtk_widget_show_all (window);
+}
+
+gint
+main (gint    argc,
+      gchar **argv)
+{
+       gtk_init (&argc, &argv);
+
+       create_window ();
+
+       gtk_main ();
+
+       return 0;
+}