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#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include "command.h"
#include "text.h"
struct keymap;
struct reactor;
struct command_list;
struct margin {
uint32_t left;
uint32_t right;
uint32_t top;
uint32_t bottom;
};
typedef struct margin (*update_hook_cb)(struct buffer *buffer,
struct command_list *commands,
uint32_t width, uint32_t height,
uint64_t frame_time, void *userdata);
struct update_hook {
update_hook_cb callback;
void *userdata;
};
struct update_hooks {
struct update_hook hooks[32];
uint32_t nhooks;
};
struct modeline {
uint8_t *buffer;
};
struct buffer {
const char *name;
const char *filename;
struct text *text;
uint32_t dot_line;
uint32_t dot_col;
// local keymaps
struct keymap *keymaps;
uint32_t nkeymaps;
uint32_t nkeymaps_max;
uint32_t scroll_line;
uint32_t scroll_col;
struct update_hooks update_hooks;
};
struct buffer buffer_create(const char *name, bool modeline);
void buffer_destroy(struct buffer *buffer);
uint32_t buffer_keymaps(struct buffer *buffer, struct keymap **keymaps_out);
void buffer_add_keymap(struct buffer *buffer, struct keymap *keymap);
int buffer_add_text(struct buffer *buffer, uint8_t *text, uint32_t nbytes);
void buffer_clear(struct buffer *buffer);
bool buffer_is_empty(struct buffer *buffer);
void buffer_kill_line(struct buffer *buffer);
void buffer_forward_delete_char(struct buffer *buffer);
void buffer_backward_delete_char(struct buffer *buffer);
void buffer_backward_char(struct buffer *buffer);
void buffer_forward_char(struct buffer *buffer);
void buffer_backward_line(struct buffer *buffer);
void buffer_forward_line(struct buffer *buffer);
void buffer_end_of_line(struct buffer *buffer);
void buffer_beginning_of_line(struct buffer *buffer);
void buffer_newline(struct buffer *buffer);
void buffer_relative_dot_pos(struct buffer *buffer, uint32_t *relline,
uint32_t *relcol);
uint32_t buffer_add_update_hook(struct buffer *buffer, update_hook_cb hook,
void *userdata);
struct buffer buffer_from_file(const char *filename, struct reactor *reactor);
void buffer_to_file(struct buffer *buffer);
void buffer_update(struct buffer *buffer, uint32_t width, uint32_t height,
struct command_list *commands, uint64_t frame_time);
struct margin buffer_modeline_hook(struct buffer *buffer,
struct command_list *commands,
uint32_t width, uint32_t height,
uint64_t frame_time, void *userdata);
// commands
#define BUFFER_WRAPCMD(fn) \
static int32_t fn##_cmd(struct command_ctx ctx, int argc, \
const char *argv[]) { \
fn(ctx.current_buffer); \
return 0; \
}
BUFFER_WRAPCMD(buffer_kill_line);
BUFFER_WRAPCMD(buffer_forward_delete_char);
BUFFER_WRAPCMD(buffer_backward_delete_char);
BUFFER_WRAPCMD(buffer_backward_char);
BUFFER_WRAPCMD(buffer_forward_char);
BUFFER_WRAPCMD(buffer_backward_line);
BUFFER_WRAPCMD(buffer_forward_line);
BUFFER_WRAPCMD(buffer_end_of_line);
BUFFER_WRAPCMD(buffer_beginning_of_line);
BUFFER_WRAPCMD(buffer_newline)
BUFFER_WRAPCMD(buffer_to_file);
static struct command BUFFER_COMMANDS[] = {
{.name = "kill-line", .fn = buffer_kill_line_cmd},
{.name = "delete-char", .fn = buffer_forward_delete_char_cmd},
{.name = "backward-delete-char", .fn = buffer_backward_delete_char_cmd},
{.name = "backward-char", .fn = buffer_backward_char_cmd},
{.name = "forward-char", .fn = buffer_forward_char_cmd},
{.name = "backward-line", .fn = buffer_backward_line_cmd},
{.name = "forward-line", .fn = buffer_forward_line_cmd},
{.name = "end-of-line", .fn = buffer_end_of_line_cmd},
{.name = "beginning-of-line", .fn = buffer_beginning_of_line_cmd},
{.name = "newline", .fn = buffer_newline_cmd},
{.name = "buffer-write-to-file", .fn = buffer_to_file_cmd},
};
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