mirror of https://github.com/OpenTTD/OpenTTD.git
84 lines
3.2 KiB
C++
84 lines
3.2 KiB
C++
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file textbuf_type.h Stuff related to text buffers. */
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#ifndef TEXTBUF_TYPE_H
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#define TEXTBUF_TYPE_H
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#include "string_type.h"
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#include "strings_type.h"
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#include "string_base.h"
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/**
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* Return values for Textbuf::HandleKeypress
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*/
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enum HandleKeyPressResult
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{
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HKPR_EDITING, ///< Textbuf content changed.
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HKPR_CURSOR, ///< Non-text change, e.g. cursor position.
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HKPR_CONFIRM, ///< Return or enter key pressed.
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HKPR_CANCEL, ///< Escape key pressed.
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HKPR_NOT_HANDLED, ///< Key does not affect editboxes.
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};
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/** Helper/buffer for input fields. */
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struct Textbuf {
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CharSetFilter afilter; ///< Allowed characters
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char * const buf; ///< buffer in which text is saved
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uint16_t max_bytes; ///< the maximum size of the buffer in bytes (including terminating '\0')
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uint16_t max_chars; ///< the maximum size of the buffer in characters (including terminating '\0')
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uint16_t bytes; ///< the current size of the string in bytes (including terminating '\0')
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uint16_t chars; ///< the current size of the string in characters (including terminating '\0')
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uint16_t pixels; ///< the current size of the string in pixels
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bool caret; ///< is the caret ("_") visible or not
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uint16_t caretpos; ///< the current position of the caret in the buffer, in bytes
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uint16_t caretxoffs; ///< the current position of the caret in pixels
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uint16_t markpos; ///< the start position of the marked area in the buffer, in bytes
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uint16_t markend; ///< the end position of the marked area in the buffer, in bytes
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uint16_t markxoffs; ///< the start position of the marked area in pixels
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uint16_t marklength; ///< the length of the marked area in pixels
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explicit Textbuf(uint16_t max_bytes, uint16_t max_chars = UINT16_MAX);
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~Textbuf();
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void Assign(StringID string);
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void Assign(const std::string_view text);
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void DeleteAll();
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bool InsertClipboard();
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bool InsertChar(char32_t key);
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bool InsertString(const char *str, bool marked, const char *caret = nullptr, const char *insert_location = nullptr, const char *replacement_end = nullptr);
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bool DeleteChar(uint16_t keycode);
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bool MovePos(uint16_t keycode);
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HandleKeyPressResult HandleKeyPress(char32_t key, uint16_t keycode);
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bool HandleCaret();
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void UpdateSize();
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void DiscardMarkedText(bool update = true);
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const char *GetText() const;
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private:
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std::unique_ptr<StringIterator> char_iter;
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bool CanDelChar(bool backspace);
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void DeleteText(uint16_t from, uint16_t to, bool update);
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void UpdateStringIter();
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void UpdateWidth();
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void UpdateCaretPosition();
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void UpdateMarkedText();
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};
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#endif /* TEXTBUF_TYPE_H */
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