/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; coding: utf-8 -*-

 * test-completion.c

 * This file is part of GtkSourceView

 *

 * Copyright (C) 2007 - Jesús Barbero Rodríguez <chuchiperriman@gmail.com>

 * Copyright (C) 2013 - Sébastien Wilmet <swilmet@gnome.org>

 *

 * 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

 */

#include <gtk/gtk.h>

#include <gtksourceview/gtksource.h>

typedef struct _TestProvider TestProvider;

typedef struct _TestProviderClass TestProviderClass;

static GtkSourceCompletionWords *word_provider;

static TestProvider *fixed_provider;

static TestProvider *random_provider;

struct _TestProvider

{

	GObject parent;

	GList *proposals;

	gint priority;

	gchar *name;

	GdkPixbuf *provider_icon;

	GdkPixbuf *item_icon;

	GIcon *item_gicon;

	/* If it's a random provider, a subset of 'proposals' are choosen on

	 * each populate. Otherwise, all the proposals are shown. */

	guint is_random : 1;

};

struct _TestProviderClass

{

	GObjectClass parent_class;

};

static void test_provider_iface_init (GtkSourceCompletionProviderIface *iface);

GType test_provider_get_type (void);

G_DEFINE_TYPE_WITH_CODE (TestProvider,

			 test_provider,

			 G_TYPE_OBJECT,

			 G_IMPLEMENT_INTERFACE (GTK_SOURCE_TYPE_COMPLETION_PROVIDER,

				 		test_provider_iface_init))

static gchar *

test_provider_get_name (GtkSourceCompletionProvider *provider)

{

	return g_strdup (((TestProvider *)provider)->name);

}

static gint

test_provider_get_priority (GtkSourceCompletionProvider *provider)

{

	return ((TestProvider *)provider)->priority;

}

static GList *

select_random_proposals (GList *all_proposals)

{

	GList *selection = NULL;

	GList *prop;

	for (prop = all_proposals; prop != NULL; prop = g_list_next (prop))

	{

		if (g_random_boolean ())

		{

			selection = g_list_prepend (selection, prop->data);

		}

	}

	return selection;

}

static void

test_provider_populate (GtkSourceCompletionProvider *completion_provider,

                        GtkSourceCompletionContext  *context)

{

	TestProvider *provider = (TestProvider *)completion_provider;

	GList *proposals;

	if (provider->is_random)

	{

		proposals = select_random_proposals (provider->proposals);

	}

	else

	{

		proposals = provider->proposals;

	}

	gtk_source_completion_context_add_proposals (context,

						     completion_provider,

						     proposals,

						     TRUE);

}

static GdkPixbuf *

test_provider_get_icon (GtkSourceCompletionProvider *provider)

{

	TestProvider *tp = (TestProvider *)provider;

	return tp->is_random ? NULL : tp->provider_icon;

}

static void

test_provider_iface_init (GtkSourceCompletionProviderIface *iface)

{

	iface->get_name = test_provider_get_name;

	iface->populate = test_provider_populate;

	iface->get_priority = test_provider_get_priority;

	iface->get_icon = test_provider_get_icon;

}

static void

test_provider_dispose (GObject *gobject)

{

	TestProvider *self = (TestProvider *)gobject;

	g_list_free_full (self->proposals, g_object_unref);

	self->proposals = NULL;

	g_clear_object (&self->provider_icon);

	g_clear_object (&self->item_icon);

	g_clear_object (&self->item_gicon);

	G_OBJECT_CLASS (test_provider_parent_class)->dispose (gobject);

}

static void

test_provider_finalize (GObject *gobject)

{

	TestProvider *self = (TestProvider *)gobject;

	g_free (self->name);

	self->name = NULL;

	G_OBJECT_CLASS (test_provider_parent_class)->finalize (gobject);

}

static void

test_provider_class_init (TestProviderClass *klass)

{

	GObjectClass *gobject_class = G_OBJECT_CLASS (klass);

	gobject_class->dispose = test_provider_dispose;

	gobject_class->finalize = test_provider_finalize;

}

static void

test_provider_init (TestProvider *self)

{

	GtkIconTheme *theme;

	GIcon *icon;

	GIcon *emblem_icon;

	GEmblem *emblem;

	theme = gtk_icon_theme_get_default ();

	self->provider_icon = gtk_icon_theme_load_icon (theme, "dialog-information", 16, 0, NULL);

	self->item_icon = gtk_icon_theme_load_icon (theme, "trophy-gold", 16, 0, NULL);

	icon = g_themed_icon_new ("trophy-silver");

	emblem_icon = g_themed_icon_new ("emblem-urgent");

	emblem = g_emblem_new (emblem_icon);

	self->item_gicon = g_emblemed_icon_new (icon, emblem);

	g_object_unref (icon);

	g_object_unref (emblem_icon);

	g_object_unref (emblem);

}

static void

test_provider_set_fixed (TestProvider *provider,

			 gint          nb_proposals)

{

	GtkSourceCompletionItem *item;

	GList *proposals = NULL;

	gint i;

	g_list_free_full (provider->proposals, g_object_unref);

	item = gtk_source_completion_item_new2 ();

	gtk_source_completion_item_set_markup (item, "A very long proposal. I repeat, a very long proposal!");

	gtk_source_completion_item_set_text (item, "A very long proposal. I repeat, a very long proposal!");

	gtk_source_completion_item_set_icon (item, provider->item_icon);

	gtk_source_completion_item_set_info (item, "To test the horizontal scrollbar and the markup.");

	proposals = g_list_prepend (proposals, item);

	item = gtk_source_completion_item_new2 ();

	gtk_source_completion_item_set_markup (item, "A proposal with a symbolic icon");

	gtk_source_completion_item_set_text (item, "Test setting the icon-name property");

	gtk_source_completion_item_set_icon_name (item, "face-cool-symbolic");

	proposals = g_list_prepend (proposals, item);

	item = gtk_source_completion_item_new2 ();

	gtk_source_completion_item_set_markup (item, "A proposal with an emblem GIcon");

	gtk_source_completion_item_set_text (item, "Test setting the GIcon property");

	gtk_source_completion_item_set_gicon (item, provider->item_gicon);

	proposals = g_list_prepend (proposals, item);

	for (i = nb_proposals - 1; i > 0; i--)

	{

		gchar *name = g_strdup_printf ("Proposal %d", i);

		item = gtk_source_completion_item_new2 ();

		gtk_source_completion_item_set_label (item, name);

		gtk_source_completion_item_set_text (item, name);

		gtk_source_completion_item_set_icon (item, provider->item_icon);

		gtk_source_completion_item_set_info (item, "The extra info of the proposal.\nA second line.");

		proposals = g_list_prepend (proposals, item);

		g_free (name);

	}

	provider->proposals = proposals;

	provider->is_random = 0;

}

static void

test_provider_set_random (TestProvider *provider,

			  gint          nb_proposals)

{

	GList *proposals = NULL;

	gint i;

	g_list_free_full (provider->proposals, g_object_unref);

	for (i = 0; i < nb_proposals; i++)

	{

		GtkSourceCompletionItem *item;

		gchar *padding = g_strnfill ((i * 3) % 10, 'o');

		gchar *name = g_strdup_printf ("Propo%ssal %d", padding, i);

		item = gtk_source_completion_item_new2 ();

		gtk_source_completion_item_set_label (item, name);

		gtk_source_completion_item_set_text (item, name);

		gtk_source_completion_item_set_icon (item, provider->item_icon);

		proposals = g_list_prepend (proposals, item);

		g_free (padding);

		g_free (name);

	}

	provider->proposals = proposals;

	provider->is_random = 1;

}

static void

add_remove_provider (GtkToggleButton             *button,

		     GtkSourceCompletion         *completion,

		     GtkSourceCompletionProvider *provider)

{

	g_return_if_fail (provider != NULL);

	if (gtk_toggle_button_get_active (button))

	{

		gtk_source_completion_add_provider (completion, provider, NULL);

	}

	else

	{

		gtk_source_completion_remove_provider (completion, provider, NULL);

	}

}

static void

enable_word_provider_toggled_cb (GtkToggleButton     *button,

				 GtkSourceCompletion *completion)

{

	add_remove_provider (button,

			     completion,

			     GTK_SOURCE_COMPLETION_PROVIDER (word_provider));

}

static void

enable_fixed_provider_toggled_cb (GtkToggleButton     *button,

				  GtkSourceCompletion *completion)

{

	add_remove_provider (button,

			     completion,

			     GTK_SOURCE_COMPLETION_PROVIDER (fixed_provider));

}

static void

enable_random_provider_toggled_cb (GtkToggleButton     *button,

				   GtkSourceCompletion *completion)

{

	add_remove_provider (button,

			     completion,

			     GTK_SOURCE_COMPLETION_PROVIDER (random_provider));

}

static void

nb_proposals_changed_cb (GtkSpinButton *spin_button,

			 TestProvider  *provider)

{

	gint nb_proposals = gtk_spin_button_get_value_as_int (spin_button);

	if (provider->is_random)

	{

		test_provider_set_random (provider, nb_proposals);

	}

	else

	{

		test_provider_set_fixed (provider, nb_proposals);

	}

}

static void

create_completion (GtkSourceView       *source_view,

		   GtkSourceCompletion *completion)

{

	/* Words completion provider */

	word_provider = gtk_source_completion_words_new (NULL, NULL);

	gtk_source_completion_words_register (word_provider,

	                                      gtk_text_view_get_buffer (GTK_TEXT_VIEW (source_view)));

	gtk_source_completion_add_provider (completion,

	                                    GTK_SOURCE_COMPLETION_PROVIDER (word_provider),

	                                    NULL);

	g_object_set (word_provider, "priority", 10, NULL);

	/* Fixed provider: the proposals don't change */

	fixed_provider = g_object_new (test_provider_get_type (), NULL);

	test_provider_set_fixed (fixed_provider, 3);

	fixed_provider->priority = 5;

	fixed_provider->name = g_strdup ("Fixed Provider");

	gtk_source_completion_add_provider (completion,

	                                    GTK_SOURCE_COMPLETION_PROVIDER (fixed_provider),

	                                    NULL);

	/* Random provider: the proposals vary on each populate */

	random_provider = g_object_new (test_provider_get_type (), NULL);

	test_provider_set_random (random_provider, 10);

	random_provider->priority = 1;

	random_provider->name = g_strdup ("Random Provider");

	gtk_source_completion_add_provider (completion,

	                                    GTK_SOURCE_COMPLETION_PROVIDER (random_provider),

	                                    NULL);

}

static void

create_window (void)

{

	GtkBuilder *builder;

	GError *error = NULL;

	GtkWindow *window;

	GtkSourceView *source_view;

	GtkSourceCompletion *completion;

	GtkCheckButton *remember_info_visibility;

	GtkCheckButton *select_on_show;

	GtkCheckButton *show_headers;

	GtkCheckButton *show_icons;

	GtkCheckButton *enable_word_provider;

	GtkCheckButton *enable_fixed_provider;

	GtkCheckButton *enable_random_provider;

	GtkSpinButton *nb_fixed_proposals;

	GtkSpinButton *nb_random_proposals;

	builder = gtk_builder_new ();

	gtk_builder_add_from_resource (builder,

				       "/org/gnome/gtksourceview/tests/ui/test-completion.ui",

				       &error);

	if (error != NULL)

	{

		g_error ("Impossible to load test-completion.ui: %s", error->message);

	}

	window = GTK_WINDOW (gtk_builder_get_object (builder, "window"));

	source_view = GTK_SOURCE_VIEW (gtk_builder_get_object (builder, "source_view"));

	remember_info_visibility = GTK_CHECK_BUTTON (gtk_builder_get_object (builder, "checkbutton_remember_info_visibility"));

	select_on_show = GTK_CHECK_BUTTON (gtk_builder_get_object (builder, "checkbutton_select_on_show"));

	show_headers = GTK_CHECK_BUTTON (gtk_builder_get_object (builder, "checkbutton_show_headers"));

	show_icons = GTK_CHECK_BUTTON (gtk_builder_get_object (builder, "checkbutton_show_icons"));

	enable_word_provider = GTK_CHECK_BUTTON (gtk_builder_get_object (builder, "checkbutton_word_provider"));

	enable_fixed_provider = GTK_CHECK_BUTTON (gtk_builder_get_object (builder, "checkbutton_fixed_provider"));

	enable_random_provider = GTK_CHECK_BUTTON (gtk_builder_get_object (builder, "checkbutton_random_provider"));

	nb_fixed_proposals = GTK_SPIN_BUTTON (gtk_builder_get_object (builder, "spinbutton_nb_fixed_proposals"));

	nb_random_proposals = GTK_SPIN_BUTTON (gtk_builder_get_object (builder, "spinbutton_nb_random_proposals"));

	completion = gtk_source_view_get_completion (source_view);

	g_signal_connect (window,

			  "destroy",

			  G_CALLBACK (gtk_main_quit),

			  NULL);

	g_object_bind_property (completion, "remember-info-visibility",

				remember_info_visibility, "active",

				G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL);

	g_object_bind_property (completion, "select-on-show",

				select_on_show, "active",

				G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL);

	g_object_bind_property (completion, "show-headers",

				show_headers, "active",

				G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL);

	g_object_bind_property (completion, "show-icons",

				show_icons, "active",

				G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL);

	create_completion (source_view, completion);

	g_signal_connect (enable_word_provider,

			  "toggled",

			  G_CALLBACK (enable_word_provider_toggled_cb),

			  completion);

	g_signal_connect (enable_fixed_provider,

			  "toggled",

			  G_CALLBACK (enable_fixed_provider_toggled_cb),

			  completion);

	g_signal_connect (enable_random_provider,

			  "toggled",

			  G_CALLBACK (enable_random_provider_toggled_cb),

			  completion);

	g_signal_connect (nb_fixed_proposals,

			  "value-changed",

			  G_CALLBACK (nb_proposals_changed_cb),

			  fixed_provider);

	g_signal_connect (nb_random_proposals,

			  "value-changed",

			  G_CALLBACK (nb_proposals_changed_cb),

			  random_provider);

	g_object_unref (builder);

}

int

main (int argc, char *argv[])

{

	gtk_init (&argc, &argv);

	create_window ();

	gtk_main ();

	/* Not really useful, except for debugging memory leaks. */

	g_object_unref (word_provider);

	g_object_unref (fixed_provider);

	g_object_unref (random_provider);

	return 0;

}