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sortix--sortix/sh/showline.h

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/*
* Copyright (c) 2011, 2012, 2013, 2014, 2015, 2016 Jonas 'Sortie' Termansen.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* showline.h
* Display a line on the terminal.
*/
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#ifndef SHOWLINE_H
#define SHOWLINE_H
#include <stddef.h>
#include <termios.h>
// TODO: Predict the terminal colors as well!
struct cursor_predict
{
bool escaped;
};
struct show_line
{
struct wincurpos wcp_start;
struct wincurpos wcp_current;
struct winsize ws;
int out_fd;
char* current_line;
size_t current_cursor;
bool invalidated;
bool wcp_pending;
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};
struct wincurpos predict_cursor(struct cursor_predict* cursor_predict,
struct wincurpos wcp,
struct winsize ws,
wchar_t c);
bool predict_will_scroll(struct cursor_predict cursor_predict,
struct wincurpos wcp,
struct winsize ws,
wchar_t c);
void show_line_begin(struct show_line* show_state, int out_fd);
void show_line_wincurpos(struct show_line* show_state,
unsigned int r,
unsigned int c);
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bool show_line_is_weird(const char* line);
void show_line_change_cursor(struct show_line* show_state, struct wincurpos wcp);
bool show_line_optimized(struct show_line* show_state, const char* line, size_t cursor);
void show_line(struct show_line* show_state, const char* line, size_t cursor);
void show_line_clear(struct show_line* show_state);
void show_line_abort(struct show_line* show_state);
void show_line_finish(struct show_line* show_state);
#endif