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/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD 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, version 2.
* OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file textbuf_type.h Stuff related to text buffers. */
#ifndef TEXTBUF_TYPE_H
#define TEXTBUF_TYPE_H
#include "string_type.h"
/** Helper/buffer for input fields. */
struct Textbuf {
char *buf; ///< buffer in which text is saved
uint16 max_bytes; ///< the maximum size of the buffer in bytes (including terminating '\0')
uint16 max_chars; ///< the maximum size of the buffer in characters (including terminating '\0')
uint16 bytes; ///< the current size of the string in bytes (including terminating '\0')
uint16 chars; ///< the current size of the string in characters (including terminating '\0')
uint16 pixels; ///< the current size of the string in pixels
bool caret; ///< is the caret ("_") visible or not
uint16 caretpos; ///< the current position of the caret in the buffer, in bytes
uint16 caretxoffs; ///< the current position of the caret in pixels
void Initialize(char *buf, uint16 max_bytes);
void Initialize(char *buf, uint16 max_bytes, uint16 max_chars);
void DeleteAll();
bool DeleteChar(int delmode);
bool InsertChar(uint32 key);
bool InsertClipboard();
bool MovePos(int navmode);
bool HandleCaret();
void UpdateSize();
private:
bool CanDelChar(bool backspace);
WChar GetNextDelChar(bool backspace);
void DelChar(bool backspace);
bool CanMoveCaretLeft();
WChar MoveCaretLeft();
bool CanMoveCaretRight();
WChar MoveCaretRight();
};
#endif /* TEXTBUF_TYPE_H */
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