mirror of
https://github.com/mruby/mruby
synced 2026-06-08 16:11:16 +00:00
Yukihiro "Matz" Matsumoto
d47dedd17d
- fix Enter in middle of line with trailing blank continuation line: now properly splits the line and removes redundant blank line - fix auto-indentation when inserting in middle of existing code: calculate indent from lines up to cursor, not entire buffer - add mirb_buffer_delete_line() for removing lines from buffer Co-authored-by: Claude <noreply@anthropic.com>
174 lines
4.2 KiB
C
174 lines
4.2 KiB
C
/*
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** mirb_buffer.h - Multi-line buffer for mirb editor
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**
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** See Copyright Notice in mruby.h
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*/
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#ifndef MIRB_BUFFER_H
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#define MIRB_BUFFER_H
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#include <mruby.h>
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/*
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* Default sizes for buffer allocation
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*/
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#define MIRB_BUF_LINE_INIT 128 /* initial line buffer size */
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#define MIRB_BUF_LINE_MAX 4096 /* maximum line length */
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#define MIRB_BUF_LINES_INIT 8 /* initial number of lines */
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#define MIRB_BUF_LINES_MAX 1024 /* maximum number of lines */
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#define MIRB_BUF_KILL_SIZE 4096 /* kill buffer size */
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/*
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* A single line in the buffer
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*/
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typedef struct mirb_line {
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char *data; /* line content (null-terminated) */
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size_t len; /* current length (excluding null) */
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size_t cap; /* allocated capacity */
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} mirb_line;
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/*
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* Multi-line buffer with cursor tracking
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*/
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typedef struct mirb_buffer {
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mirb_line *lines; /* array of lines */
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size_t line_count; /* number of lines */
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size_t line_cap; /* allocated line slots */
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size_t cursor_line; /* current line (0-indexed) */
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size_t cursor_col; /* current column (0-indexed) */
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char *kill_buf; /* kill buffer for cut/paste */
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size_t kill_len; /* length of kill buffer content */
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mrb_bool modified; /* buffer has been modified */
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} mirb_buffer;
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/*
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* Initialize buffer
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* Returns TRUE on success
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*/
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mrb_bool mirb_buffer_init(mirb_buffer *buf);
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/*
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* Free buffer resources
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*/
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void mirb_buffer_free(mirb_buffer *buf);
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/*
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* Clear buffer content (reset to single empty line)
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*/
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void mirb_buffer_clear(mirb_buffer *buf);
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/*
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* Get total character count across all lines
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*/
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size_t mirb_buffer_total_len(mirb_buffer *buf);
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/*
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* Get buffer content as a single string
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* Lines are joined with newlines
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* Caller must free the returned string
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*/
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char *mirb_buffer_to_string(mirb_buffer *buf);
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/*
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* Set buffer content from string
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* String may contain newlines
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*/
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mrb_bool mirb_buffer_set_string(mirb_buffer *buf, const char *str);
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/*
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* Insert a character at cursor position
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*/
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mrb_bool mirb_buffer_insert_char(mirb_buffer *buf, char c);
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/*
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* Insert a string at cursor position
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*/
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mrb_bool mirb_buffer_insert_string(mirb_buffer *buf, const char *str, size_t len);
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/*
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* Delete character before cursor (backspace)
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* Returns TRUE if a character was deleted
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*/
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mrb_bool mirb_buffer_delete_back(mirb_buffer *buf);
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/*
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* Delete character at cursor (delete key)
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* Returns TRUE if a character was deleted
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*/
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mrb_bool mirb_buffer_delete_forward(mirb_buffer *buf);
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/*
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* Insert newline at cursor position (split current line)
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*/
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mrb_bool mirb_buffer_newline(mirb_buffer *buf);
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/*
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* Delete a line at the given index
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*/
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void mirb_buffer_delete_line(mirb_buffer *buf, size_t line_idx);
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/*
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* Cursor movement functions
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* Return TRUE if cursor moved
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*/
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mrb_bool mirb_buffer_cursor_left(mirb_buffer *buf);
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mrb_bool mirb_buffer_cursor_right(mirb_buffer *buf);
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mrb_bool mirb_buffer_cursor_up(mirb_buffer *buf);
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mrb_bool mirb_buffer_cursor_down(mirb_buffer *buf);
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/*
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* Move cursor to beginning/end of current line
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*/
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void mirb_buffer_cursor_home(mirb_buffer *buf);
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void mirb_buffer_cursor_end(mirb_buffer *buf);
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/*
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* Move cursor to beginning/end of buffer
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*/
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void mirb_buffer_cursor_start(mirb_buffer *buf);
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void mirb_buffer_cursor_finish(mirb_buffer *buf);
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/*
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* Word movement (like Emacs Alt+B, Alt+F)
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*/
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mrb_bool mirb_buffer_cursor_word_back(mirb_buffer *buf);
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mrb_bool mirb_buffer_cursor_word_forward(mirb_buffer *buf);
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/*
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* Kill operations (cut to kill buffer)
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* Ctrl+K: kill to end of line
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* Ctrl+U: kill to beginning of line
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* Ctrl+W: kill word backward
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* Alt+D: kill word forward
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*/
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void mirb_buffer_kill_to_end(mirb_buffer *buf);
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void mirb_buffer_kill_to_start(mirb_buffer *buf);
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void mirb_buffer_kill_word_back(mirb_buffer *buf);
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void mirb_buffer_kill_word_forward(mirb_buffer *buf);
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/*
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* Yank (paste from kill buffer)
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* Ctrl+Y
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*/
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mrb_bool mirb_buffer_yank(mirb_buffer *buf);
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/*
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* Get current line content
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*/
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const char *mirb_buffer_current_line(mirb_buffer *buf);
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/*
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* Get line at index
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*/
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const char *mirb_buffer_line_at(mirb_buffer *buf, size_t index);
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/*
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* Get length of line at index
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*/
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size_t mirb_buffer_line_len(mirb_buffer *buf, size_t index);
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#endif /* MIRB_BUFFER_H */
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