/*
 * Copyright (C) 2013 - Juan Ferrer Toribio
 *
 * 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 "glade-vn.h"
#include "glade-db-model-editor.h"

/*
 * Contents of this file:
 *		definition of the custom property editors for the DbModel properties.
 *		definition of the SQL statement editor for the "sql" property of the
 * DbModel.
 *		the definition of the param-related properties can be found at their
 * own file glade-db-model-links.c and glade-db-model-batch.c 
 */

#ifdef _HAVE_GTKSOURCEVIEW
#include <gtksourceview/gtksourceview.h>
#include <gtksourceview/gtksourcebuffer.h>
#include <gtksourceview/gtksourcelanguage.h>
#include <gtksourceview/gtksourcelanguagemanager.h>
#endif

#define NEW_SQL _("New SQL statement")

//+++++++++++++++++++++++++++++++++++++++++++++++++++ SQL Editor Property

typedef struct
{
	GladeEditorProperty parent;

	GtkWidget * button;
	GtkWidget * entry;
	gint width;
	gint height;
}
GladeEPropSql;

GLADE_MAKE_EPROP (GladeEPropSql, glade_eprop_sql)
#define GLADE_TYPE_EPROP_SQL			(glade_eprop_sql_get_type())
#define GLADE_EPROP_SQL(obj)			(G_TYPE_CHECK_INSTANCE_CAST ((obj), GLADE_TYPE_EPROP_SQL, GladeEPropSql))
#define GLADE_EPROP_SQL_CLASS(klass)	(G_TYPE_CHECK_CLASS_CAST ((klass), GLADE_TYPE_EPROP_SQL, GladeEPropSqlClass))
#define GLADE_IS_EPROP_SQL(obj)			(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GLADE_TYPE_EPROP_SQL))
#define GLADE_IS_EPROP_SQL_CLASS(klass)	(G_TYPE_CHECK_CLASS_TYPE ((klass), GLADE_TYPE_EPROP_SQL))
#define GLADE_EPROP_SQL_GET_CLASS(obj)	(G_TYPE_INSTANCE_GET_CLASS ((obj), GLADE_EPROP_SQL, GladeEPropSqlClass))

static void glade_eprop_sql_show_dialog (GtkButton * button, GladeEditorProperty * eprop)
{
	gpointer text, buffer;
	const gchar * sql;
	GladeEPropSql * obj = GLADE_EPROP_SQL (eprop);
	PangoFontDescription * font;
	GtkWidget * scroll;
	GladeProperty * p = glade_editor_property_get_property (eprop);
	GtkDialog * dialog = GTK_DIALOG (gtk_dialog_new_with_buttons
		(_("SQL Editor")
		,GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (eprop)))
		,GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT
		,_("OK"),		GTK_RESPONSE_OK
		,_("Clear"),	GTK_RESPONSE_REJECT
		,_("Cancel"),	GTK_RESPONSE_CANCEL
		,NULL
	));

/*	gtk_dialog_set_alternative_button_order (dialog,
		GTK_RESPONSE_OK, GTK_RESPONSE_REJECT, GTK_RESPONSE_CANCEL, -1);*/
	gtk_dialog_set_default_response (dialog, GTK_RESPONSE_OK);
	gtk_window_set_default_size (GTK_WINDOW (dialog), obj->width, obj->height);

	scroll = gtk_scrolled_window_new (gtk_adjustment_new (0,0,0,0,0,0),
		gtk_adjustment_new (0,0,0,0,0,0));
	gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scroll), GTK_SHADOW_IN);
	gtk_widget_set_margin_top (scroll, 6);
	gtk_widget_set_margin_bottom (scroll, 6);
	gtk_widget_set_margin_start (scroll, 6);
	gtk_widget_set_margin_end (scroll, 6);
	gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (dialog)),
		scroll, TRUE, TRUE, 6);

#ifdef _HAVE_GTKSOURCEVIEW
	GtkSourceLanguageManager * lm = gtk_source_language_manager_new ();
	GtkSourceLanguage * lang = gtk_source_language_manager_get_language (lm, "sql");
	text = gtk_source_view_new ();
	gtk_source_view_set_tab_width (text, 4);
	gtk_source_view_set_show_line_numbers (text, TRUE);
	gtk_source_view_set_highlight_current_line (text, TRUE);
	buffer = gtk_text_view_get_buffer (text);
	gtk_source_buffer_set_language (buffer, lang);
	gtk_source_buffer_set_highlight_matching_brackets (buffer, TRUE);
#else
	text = gtk_text_view_new ();
	buffer = gtk_text_view_get_buffer (text);
#endif

	font = pango_font_description_from_string ("Monospace");
	gtk_widget_override_font (text, font);
	pango_font_description_free (font);

	if ((sql = g_value_get_string (glade_property_inline_value (p))))
		gtk_text_buffer_set_text (buffer, sql, -1);

	gtk_container_add (GTK_CONTAINER (scroll), text);
	gtk_widget_show_all (scroll);

	switch (gtk_dialog_run (dialog))
	{
		case GTK_RESPONSE_OK:
		{
			GValue val = G_VALUE_INIT;
			GtkTextIter * start = g_new (GtkTextIter, 1),
				* end = g_new (GtkTextIter, 1);
			g_value_init (&val, G_TYPE_STRING);
			gtk_text_buffer_get_bounds (buffer, start, end);

			sql = gtk_text_buffer_get_text (buffer, start, end, TRUE);
			g_value_set_string (&val, sql);
			glade_command_set_property_value (p, &val);

			g_value_unset (&val);
			g_free (start);
			g_free (end);
			break;
		}
		case GTK_RESPONSE_REJECT:
		{
			GValue val = G_VALUE_INIT;
			g_value_init (&val, G_TYPE_STRING);
			g_value_set_string (&val, "");
			glade_command_set_property_value (p, &val);
			g_value_unset (&val);
			break;
		}
		case GTK_RESPONSE_CANCEL:
		default:
			break;
	}

	obj->width = gtk_widget_get_allocated_width (GTK_WIDGET (dialog));
	obj->height = gtk_widget_get_allocated_height (GTK_WIDGET (dialog));
	gtk_widget_destroy (GTK_WIDGET (dialog));
}

static void glade_eprop_sql_entry_text_changed (GtkEntry * entry, 
	GladeEditorProperty * eprop)
{
	const gchar * text = gtk_entry_get_text (entry); 
	GladeProperty * p = glade_editor_property_get_property (eprop);

	if (text)
	{
		GValue val = G_VALUE_INIT;
		g_value_init (&val, G_TYPE_STRING);
		g_value_set_string (&val, text);
		glade_command_set_property_value (p, &val);
		g_value_unset (&val);
	}
}

static GtkWidget * glade_eprop_sql_create_input (GladeEditorProperty * eprop)
{
	GladeEPropSql * obj = GLADE_EPROP_SQL (eprop);
	GtkWidget * box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0); 

	obj->entry = gtk_entry_new ();
	gtk_widget_set_hexpand (obj->entry, TRUE);
	g_signal_connect (obj->entry, "changed",
		G_CALLBACK (glade_eprop_sql_entry_text_changed), obj);
	gtk_container_add (GTK_CONTAINER (box), obj->entry);

	obj->button = gtk_button_new_with_label ("...");
	g_signal_connect (obj->button, "clicked",
		G_CALLBACK (glade_eprop_sql_show_dialog), obj);
	gtk_widget_set_tooltip_text (obj->button, _("Open the SQL Editor"));
	gtk_container_add (GTK_CONTAINER (box), obj->button);

	gtk_widget_show_all (box);

	obj->width = 750;
	obj->height = 550; 

	return box;
}

static void glade_eprop_sql_load (GladeEditorProperty * eprop, GladeProperty * property)
{
	const gchar * sql;
	GladeEPropSql * obj = GLADE_EPROP_SQL (eprop);

	GladeEditorPropertyClass * parent_class =
		g_type_class_peek_parent (GLADE_EDITOR_PROPERTY_GET_CLASS (eprop));
	parent_class->load (eprop, property);

	if (!property)
		return;

	if ((sql = g_value_get_string (glade_property_inline_value (property))))
		gtk_entry_set_text (GTK_ENTRY (obj->entry), sql);
	else
		gtk_entry_set_text (GTK_ENTRY (obj->entry), "");
}

static void glade_eprop_sql_finalize (GObject * object)
{
	GObjectClass * parent_class = g_type_class_peek_parent (G_OBJECT_GET_CLASS (object));
	G_OBJECT_CLASS (parent_class)->finalize (object);
}

//+++++++++++++++++++++++++++++++++++++++++++++++++++ Links Editor Property

typedef struct
{
	GladeEditorProperty parent;

	GtkTreeView * view;
	gchar * path;
}
GladeEPropLinks;

GLADE_MAKE_EPROP (GladeEPropLinks, glade_eprop_links)
#define GLADE_TYPE_EPROP_LINKS				(glade_eprop_links_get_type ())
#define GLADE_EPROP_LINKS(obj)				(G_TYPE_CHECK_INSTANCE_CAST ((obj), GLADE_TYPE_EPROP_LINKS, GladeEPropLinks))
#define GLADE_EPROP_LINKS_CLASS(klass)		(G_TYPE_CHECK_CLASS_CAST ((klass), GLADE_TYPE_EPROP_LINKS, GladeEPropLinksClass))
#define GLADE_IS_EPROP_LINKS(obj)			(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GLADE_TYPE_EPROP_LINKS))
#define GLADE_IS_EPROP_LINKS_CLASS(klass)	(G_TYPE_CHECK_CLASS_TYPE ((klass), GLADE_TYPE_EPROP_LINKS))
#define GLADE_EPROP_LINKS_GET_CLASS(obj)	(G_TYPE_INSTANCE_GET_CLASS ((obj), GLADE_EPROP_LINKS, GladeEPropLinksClass))

enum
{
	 FIELD_COL
	,PARAM_COL
	,N_COLS
};

static void glade_eprop_links_on_param_col_clicked (GtkEntry * entry,
	GtkEntryIconPosition icon_pos, GdkEvent * event, GladeEditorProperty * eprop)
{
	GtkTreeIter iter;
	GladeProperty * p = glade_editor_property_get_property (eprop);
	GladeWidget * widget = glade_property_get_widget (p);
	GladeProject * project = glade_widget_get_project (widget);
	GtkListStore * store = ((GladeDbList *) g_value_get_boxed (glade_property_inline_value (p)))->list;
	gchar * path = GLADE_EPROP_LINKS (eprop)->path;

	if (!gtk_tree_model_get_iter_from_string (GTK_TREE_MODEL (store), &iter, path))
		return;

	gtk_tree_model_get (GTK_TREE_MODEL (store), &iter, PARAM_COL, &widget, -1);

	if (glade_editor_property_show_object_dialog (project,
		_("Select a GvnParam"), NULL, GVN_TYPE_PARAM, NULL, &widget))
	{
		if (widget)
			gtk_list_store_set (store, &iter, PARAM_COL, widget, -1);
		else
			gtk_list_store_set (store, &iter, PARAM_COL, NULL, -1);
	}
}

static gboolean glade_eprop_links_on_param_key_pressed (GtkEntry * entry,
	GdkEventKey * event, GladeEditorProperty * eprop)
{
	if (event->keyval == GDK_KEY_Return)
	{
		glade_eprop_links_on_param_col_clicked (entry, 0, NULL, eprop);
		return TRUE;
	}
	else if (event->keyval == GDK_KEY_Delete)
	{
		GtkTreeIter iter;
		gchar * path = GLADE_EPROP_LINKS (eprop)->path;
		GladeProperty * p = glade_editor_property_get_property (eprop);
		GtkListStore * store = ((GladeDbList *) g_value_get_boxed (glade_property_inline_value (p)))->list;

		if (gtk_tree_model_get_iter_from_string (GTK_TREE_MODEL (store), &iter, path))
		{
			gtk_list_store_set (store, &iter, PARAM_COL, NULL, -1);
			return TRUE;
		}
	}
	return FALSE;
}

void param_col_cell_data (GtkTreeViewColumn * view, GtkCellRenderer * cell,
	GtkTreeModel * model, GtkTreeIter * iter, gpointer data)
{
	GladeWidget * param;
	gtk_tree_model_get (model, iter, PARAM_COL, &param, -1);

	if (param)
		g_object_set (cell, "text", glade_widget_get_name (param), NULL);
	else
		g_object_set (cell, "text", "", NULL);
}

static void glade_eporp_links_on_param_col_editing_started (GtkCellRendererText * cell,
	GtkEntry * entry, gchar * path, GladeEditorProperty * eprop)
{
	GladeEPropLinks * obj = GLADE_EPROP_LINKS (eprop);

	if (GTK_IS_ENTRY (entry))
	{
		GList * n;
		gboolean have_params = FALSE;
		GladeProperty * p = glade_editor_property_get_property (eprop);
		GladeProject * project = glade_widget_get_project
			(glade_property_get_widget (p));
		GList * objects = (GList *) glade_project_get_objects (project);

		for (n = objects; n; n = n->next)
		if ((have_params = GVN_IS_PARAM (n->data)))
			break;

		if (have_params)
		{
			g_object_set (entry
				,"secondary-icon-name", "content-loading-symbolic"
				,"secondary-icon-sensitive", TRUE
				,"secondary-icon-tooltip-text", _("Select the parameter from a list")
				,NULL);

			if (obj->path)
				g_free (obj->path);

			obj->path = g_strdup (path);

			g_signal_connect (entry, "icon-press",
				G_CALLBACK (glade_eprop_links_on_param_col_clicked), eprop);
			g_signal_connect (entry, "key-press-event",
				G_CALLBACK (glade_eprop_links_on_param_key_pressed), eprop);
		}
		else
		{
			g_object_set (entry
				,"secondary-icon-name", "dialog-warning-symbolic"
				,"secondary-icon-sensitive", FALSE
				,"secondary-icon-tooltip-text", _("You need to create at least "
					"one GvnParam or derived object")
				,NULL);
			g_signal_handlers_disconnect_by_data (entry, eprop);
		}

		g_object_set (entry
			,"editable", FALSE
			,NULL);
	}
}

static void glade_eporp_links_on_field_col_edited (GtkCellRendererText * cell,
	gchar * path, const gchar * text, GladeEditorProperty * eprop)
{
	GtkTreeIter iter;
	GladeProperty * p = glade_editor_property_get_property (eprop);
	GladeDbList * list = g_value_get_boxed (glade_property_inline_value (p));
	GtkListStore * store = list->list; 

	if (!gtk_tree_model_get_iter_from_string (GTK_TREE_MODEL (store), &iter, path))
		return;

	gtk_list_store_set (store, &iter, FIELD_COL, text, -1);
}

static void glade_widget_on_remove_widget (GladeProject * project,
	GladeWidget * widget, GtkListStore * store)
{
	if (g_type_is_a (G_OBJECT_TYPE (glade_widget_get_object (widget)), GVN_TYPE_PARAM))
	{
		GtkTreeIter iter;
		GtkTreeModel * m = GTK_TREE_MODEL (store);

		if (gtk_tree_model_get_iter_first (m, &iter))
		do
		{
			GladeWidget * param;
			gtk_tree_model_get (m, &iter, PARAM_COL, &param, -1);

			if (param == widget)
				gtk_list_store_set (store, &iter, PARAM_COL, NULL, -1);
		}
		while (gtk_tree_model_iter_next (m, &iter));
	}
}

static void glade_eporp_links_on_add_clicked (GtkButton * button,
	GladeEPropLinks * obj)
{
	GtkTreeIter iter;
	GtkTreePath * path;
	GladeDbList * list;
	GtkListStore * store;
	GladeProperty * p = glade_editor_property_get_property (GLADE_EDITOR_PROPERTY (obj));

	if (!(list = g_value_get_boxed (glade_property_inline_value (p))))
	{
		list = g_new (GladeDbList, 1);
		list->list = gtk_list_store_new (N_COLS, G_TYPE_STRING, GLADE_TYPE_WIDGET);
		glade_property_set (p, list);

		g_signal_connect (glade_widget_get_project (glade_property_get_widget (p)),
			"remove-widget", G_CALLBACK (glade_widget_on_remove_widget), list->list);
	}

	store = list->list;
	gtk_tree_view_set_model (obj->view, GTK_TREE_MODEL (store));

	gtk_list_store_append (store, &iter);
	path = gtk_tree_model_get_path (GTK_TREE_MODEL (store), &iter);

	gtk_tree_view_scroll_to_cell (obj->view, path, NULL, FALSE, 0, 0);
	gtk_tree_view_set_cursor (obj->view, path, NULL, TRUE);
	gtk_widget_grab_focus (GTK_WIDGET (obj->view));

	gtk_tree_path_free (path);
}

static void glade_eporp_links_on_remove_clicked (GtkButton * button,
	GladeEPropLinks * obj)
{
	GtkTreeIter iter;
	GtkListStore * store;
	GtkTreeSelection * selection = gtk_tree_view_get_selection (obj->view);
	GladeProperty * p;

	if (!gtk_tree_selection_get_selected (selection, (GtkTreeModel **) &store, &iter))
		return;

	p = glade_editor_property_get_property (GLADE_EDITOR_PROPERTY (obj));
	gtk_list_store_remove (store, &iter);

	if (!gtk_tree_model_get_iter_first (GTK_TREE_MODEL (store), &iter))
	{
		gtk_tree_view_set_model (obj->view, NULL);
		glade_command_set_property (p, NULL);

		g_signal_handlers_disconnect_by_func (
			glade_widget_get_project (glade_property_get_widget (p)),
				glade_widget_on_remove_widget, store);
	}
}

static gboolean glade_eprop_links_on_view_key_press (GtkWidget * treeview,
	GdkEventKey * event, GladeEPropLinks * obj)
{
	if (event->keyval == GDK_KEY_Delete)
	{
		glade_eporp_links_on_remove_clicked (NULL, obj);
		return TRUE;
	}
	else if ((event->state & GDK_CONTROL_MASK) != 0
	&& (event->keyval == GDK_KEY_n || event->keyval == GDK_KEY_N))
	{
		glade_eporp_links_on_add_clicked (NULL, obj);
		return TRUE;
	}

	return FALSE;
}

static GtkWidget * glade_eprop_links_create_input (GladeEditorProperty * eprop)
{
	GtkCellRenderer * cell;
	GtkTreeViewColumn * column;
	GladeEPropLinks * obj = GLADE_EPROP_LINKS (eprop);
	GtkWidget * scroll, * button, * label,
		* hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4),
		* box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);

	label = gtk_label_new (_("<b>Add or remove links</b>"));
	gtk_label_set_use_markup (GTK_LABEL (label), TRUE);
	gtk_misc_set_alignment (GTK_MISC (label), 0, 0.5);
	gtk_misc_set_padding (GTK_MISC (label), 2, 4);
	gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);

	button = gtk_button_new ();
	gtk_button_set_image (GTK_BUTTON (button),
		gtk_image_new_from_icon_name ("list-add", GTK_ICON_SIZE_BUTTON));
	g_signal_connect (button, "clicked",
		G_CALLBACK (glade_eporp_links_on_add_clicked), obj);
	gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);

	button = gtk_button_new ();
	gtk_button_set_image (GTK_BUTTON (button),
		gtk_image_new_from_icon_name ("list-remove", GTK_ICON_SIZE_BUTTON));
	g_signal_connect (button, "clicked",
		G_CALLBACK (glade_eporp_links_on_remove_clicked), obj);
	gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);

	gtk_box_pack_start (GTK_BOX (box), hbox, FALSE, FALSE, 0);

	scroll = gtk_scrolled_window_new (NULL, NULL);
	gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scroll), GTK_SHADOW_IN);
	gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scroll),
		GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
	gtk_box_pack_start (GTK_BOX (box), scroll, TRUE, TRUE, 0);

	obj->view = GTK_TREE_VIEW (gtk_tree_view_new ());
	gtk_tree_view_set_grid_lines (obj->view, GTK_TREE_VIEW_GRID_LINES_BOTH);
	g_signal_connect (obj->view, "key-press-event",
		G_CALLBACK (glade_eprop_links_on_view_key_press), obj);
	gtk_container_add (GTK_CONTAINER (scroll), GTK_WIDGET (obj->view));

	cell = gtk_cell_renderer_text_new ();
	g_object_set (cell, "editable", TRUE, NULL);
	column = gtk_tree_view_column_new_with_attributes (_("Column"), cell,
		"text", FIELD_COL, NULL);
	gtk_tree_view_column_set_expand (column, TRUE);
	g_signal_connect (cell, "edited",
		G_CALLBACK (glade_eporp_links_on_field_col_edited), obj);
	gtk_tree_view_append_column (obj->view, column);

	cell = gtk_cell_renderer_text_new ();
	g_object_set (cell, "editable", TRUE, NULL);
	column = gtk_tree_view_column_new_with_attributes (_("Param"), cell, NULL);
	gtk_tree_view_column_set_cell_data_func (column, cell, param_col_cell_data, obj, NULL);
	gtk_tree_view_column_set_expand (column, TRUE);
	g_signal_connect (cell, "editing-started",
		G_CALLBACK (glade_eporp_links_on_param_col_editing_started), obj);
	gtk_tree_view_append_column (obj->view, column);

	g_object_set (G_OBJECT (box), "height-request", 200, NULL);
	gtk_widget_show_all (box);
	return box;
}

static void glade_eprop_links_finalize (GObject * object)
{
	GladeEPropLinks * obj = GLADE_EPROP_LINKS (object);
	GObjectClass * parent =
		g_type_class_peek_parent (GLADE_EPROP_LINKS_GET_CLASS (obj));
	parent->finalize (G_OBJECT (obj));
}

static void glade_eprop_links_load (GladeEditorProperty * eprop, GladeProperty * property)
{
	GladeDbList * list;
	GladeEPropLinks * obj = GLADE_EPROP_LINKS (eprop);
	GladeEditorPropertyClass * parent_class =
		g_type_class_peek_parent (GLADE_EDITOR_PROPERTY_GET_CLASS (eprop));
	parent_class->load (eprop, property);

	if (!property)
		return;

	if ((list = g_value_get_boxed (glade_property_inline_value (property))))
		gtk_tree_view_set_model (obj->view, GTK_TREE_MODEL (list->list));
	else
		gtk_tree_view_set_model (obj->view, NULL);
}

//++++++++++++++++++++++++++++++++++++++++++++++++++ DbModel Widget Adaptor

GladeEditorProperty * glade_db_model_create_eprop (GladeWidgetAdaptor * adaptor,
	GladePropertyClass * klass, gboolean use_command)
{
	GladeEditorProperty * eprop;
	GParamSpec * pspec = glade_property_class_get_pspec (klass);

	if (!g_strcmp0 (pspec->name, "sql"))
		eprop = g_object_new (GLADE_TYPE_EPROP_SQL,
			"property-class", klass,
			"use-command", use_command, NULL);
	else if (pspec->value_type == GLADE_TYPE_DB_LIST)
		eprop = g_object_new (GLADE_TYPE_EPROP_LINKS,
			"property-class", klass,
			"use-command", use_command, NULL);
	else
		eprop = GWA_GET_CLASS (G_TYPE_OBJECT)->create_eprop (adaptor,
			klass, use_command);

	return eprop;
}

GladeEditable * glade_db_model_create_editable (GladeWidgetAdaptor * adaptor,
	GladeEditorPageType type)
{
	GladeEditable * editable =
		GWA_GET_CLASS (G_TYPE_OBJECT)->create_editable (adaptor, type);

	if (type == GLADE_PAGE_GENERAL)
		return GLADE_EDITABLE (glade_model_editor_new (adaptor, editable));

	return editable;
}

void glade_db_model_write_widget (GladeWidgetAdaptor * adaptor,
	GladeWidget * widget, GladeXmlContext * context, GladeXmlNode * node)
{
	GtkTreeIter iter;
	GladeDbList * l;
	GtkTreeModel * m;
	GladeXmlNode * links_node;
	GladeProperty * prop;
	
	if (!glade_xml_node_verify (node, GLADE_XML_TAG_WIDGET))
		return;

	prop = glade_widget_get_property (widget, "use-file");
	glade_property_write (prop, context, node);

	prop = glade_widget_get_property (widget, "sql");
	glade_property_write (prop, context, node);

	GWA_GET_CLASS (G_TYPE_OBJECT)->write_widget (adaptor, widget, context, node);

	prop = glade_widget_get_property (widget, "links");
//  Custom tag for the "links" property, e.g.:
//  <links>
//		<link field="table.name" param="param1"/>
//  </links>
	if (!(l = g_value_get_boxed (glade_property_inline_value (prop))))
		return;

	m = GTK_TREE_MODEL (l->list);

	if (!gtk_tree_model_get_iter_first (m, &iter))
		return;

	links_node = glade_xml_node_new (context, "links");

	do
	{
		gchar * field;
		GladeWidget * param;
		GladeXmlNode * link_node;

		gtk_tree_model_get (m, &iter, FIELD_COL, &field, PARAM_COL, &param, -1);

		link_node = glade_xml_node_new (context, "link");
		glade_xml_node_append_child (links_node, link_node);
		glade_xml_node_set_property_string (link_node, "field",
			field ?	field : "");
		glade_xml_node_set_property_string (link_node, "param",
			param ?	glade_widget_get_name (param) : "");

		g_free (field);
	}
	while (gtk_tree_model_iter_next (m, &iter));

	if (!glade_xml_node_get_children (links_node))
		glade_xml_node_delete (links_node);
	else
		glade_xml_node_append_child (node, links_node);
}

typedef struct
{
	GtkListStore * store;
	GtkTreeIter * iter;
	gchar * param_name;
}
ParseData;

void glade_db_model_on_parse_finished (GladeProject * p, ParseData * pd)
{
	GladeWidget * param = glade_project_get_widget_by_name (p, pd->param_name);

	gtk_list_store_set (pd->store, pd->iter, PARAM_COL, param, -1);

	g_object_unref (pd->store);
	gtk_tree_iter_free (pd->iter);
	g_free (pd->param_name);
	g_free (pd);
}

void glade_db_model_read_widget (GladeWidgetAdaptor * adaptor,
	GladeWidget * widget, GladeXmlNode * node)
{
	GladeXmlNode * links_node;
	GladeProperty * prop;
	GladeProject * proj;
	GladeDbList * list;
	GtkListStore * store;

	if (!glade_xml_node_verify (node, GLADE_XML_TAG_WIDGET))
		return;

	GWA_GET_CLASS (G_TYPE_OBJECT)->read_widget (adaptor, widget, node);

	if ((links_node = glade_xml_search_child (node, "links")) == NULL)
		return;

	proj = glade_widget_get_project (widget);
	list = g_new (GladeDbList, 1);
	store = gtk_list_store_new (N_COLS, G_TYPE_STRING, GLADE_TYPE_WIDGET);
	list->list = store;

	for (links_node = glade_xml_node_get_children (links_node); links_node;
		links_node = glade_xml_node_next (links_node))
	{
		GtkTreeIter iter;
		gint col = PARAM_COL;
		gchar * field = glade_xml_get_property_string (links_node, "field"),
			* param_name = glade_xml_get_property_string (links_node, "param");
		GladeWidget * param = glade_project_get_widget_by_name (proj, param_name);

		gtk_list_store_append (store, &iter);

		if (!param)
		{
			ParseData * pd;
			pd = g_new (ParseData, 1);
			pd->store = g_object_ref (store);
			pd->iter = gtk_tree_iter_copy (&iter);
			pd->param_name = g_strdup (param_name);

			g_signal_connect (proj, "parse-finished",
				G_CALLBACK (glade_db_model_on_parse_finished), pd);

			col = -1;
		}

		gtk_list_store_set (store, &iter
			,FIELD_COL, field
			,col, param
			,-1);

		g_free (field);
		g_free (param_name);
	}

	prop = glade_widget_get_property (widget, "links");
	glade_property_set (prop, list);
}