/*
 *
 * This program 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 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>  
 *
 *
 * Authors:
 *		Jon Trowbridge <trow@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include "e-text-model-repos.h"

#define MODEL_CLAMP(model, pos) (CLAMP((pos), 0, strlen((model)->text)))

gint
e_repos_shift (gint pos, gpointer data)
{
	EReposShift *info = (EReposShift *) data;
	g_return_val_if_fail (data, -1);

	return e_text_model_validate_position (info->model, pos + info->change);
}

gint
e_repos_absolute (gint pos, gpointer data)
{
	EReposAbsolute *info = (EReposAbsolute *) data;
	g_return_val_if_fail (data, -1);

	pos = info->pos;
	if (pos < 0) {
		gint len = e_text_model_get_text_length (info->model);
		pos += len + 1;
	}

	return e_text_model_validate_position (info->model, pos);
}

gint
e_repos_insert_shift (gint pos, gpointer data)
{
	EReposInsertShift *info = (EReposInsertShift *) data;
	g_return_val_if_fail (data, -1);

	if (pos >= info->pos)
		pos += info->len;

	return e_text_model_validate_position (info->model, pos);
}

gint
e_repos_delete_shift (gint pos, gpointer data)
{
	EReposDeleteShift *info = (EReposDeleteShift *) data;
	g_return_val_if_fail (data, -1);

	if (pos > info->pos + info->len)
		pos -= info->len;
	else if (pos > info->pos)
		pos = info->pos;

	return e_text_model_validate_position (info->model, pos);
}

gint
e_repos_clamp (gint pos, gpointer data)
{
	ETextModel *model;

	g_return_val_if_fail (data != NULL && E_IS_TEXT_MODEL (data), -1);
	model = E_TEXT_MODEL (data);

	return e_text_model_validate_position (model, pos);
}