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/*
* 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"
#include "strings_type.h"
#include "string_base.h"
/**
* Return values for Textbuf::HandleKeypress
*/
enum HandleKeyPressResult
{
HKPR_EDITING, ///< Textbuf content changed.
HKPR_CURSOR, ///< Non-text change, e.g. cursor position.
HKPR_CONFIRM, ///< Return or enter key pressed.
HKPR_CANCEL, ///< Escape key pressed.
HKPR_NOT_HANDLED, ///< Key does not affect editboxes.
};
/** Helper/buffer for input fields. */
struct Textbuf {
CharSetFilter afilter; ///< Allowed characters
char * const 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
uint16 markpos; ///< the start position of the marked area in the buffer, in bytes
uint16 markend; ///< the end position of the marked area in the buffer, in bytes
uint16 markxoffs; ///< the start position of the marked area in pixels
uint16 marklength; ///< the length of the marked area in pixels
explicit Textbuf(uint16 max_bytes, uint16 max_chars = UINT16_MAX);
~Textbuf();
void Assign(StringID string);
void Assign(const char *text);
void CDECL Print(const char *format, ...) WARN_FORMAT(2, 3);
void DeleteAll();
bool InsertClipboard();
bool InsertChar(WChar key);
bool InsertString(const char *str, bool marked, const char *caret = nullptr, const char *insert_location = nullptr, const char *replacement_end = nullptr);
bool DeleteChar(uint16 keycode);
bool MovePos(uint16 keycode);
HandleKeyPressResult HandleKeyPress(WChar key, uint16 keycode);
bool HandleCaret();
void UpdateSize();
void DiscardMarkedText(bool update = true);
private:
StringIterator *char_iter;
bool CanDelChar(bool backspace);
void DeleteText(uint16 from, uint16 to, bool update);
void UpdateStringIter();
void UpdateWidth();
void UpdateCaretPosition();
void UpdateMarkedText();
};
#endif /* TEXTBUF_TYPE_H */
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