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/* $Id: screen-redraw.c,v 1.4 2008-01-03 21:32:11 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
*
* 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 MIND, 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.
*/
#include <sys/types.h>
#include <string.h>
#include "tmux.h"
void screen_redraw_get_cell(struct screen_redraw_ctx *,
u_int, u_int, u_char *, u_char *, u_char *);
/* Initialise redrawing with a window. */
void
screen_redraw_start_window(struct screen_redraw_ctx *ctx, struct window *w)
{
struct screen *t = w->screen;
screen_redraw_start(ctx, t, tty_write_window, w);
}
/* Initialise redrawing with a client. */
void
screen_redraw_start_client(struct screen_redraw_ctx *ctx, struct client *c)
{
struct screen *t = c->session->curw->window->screen;
screen_redraw_start(ctx, t, tty_write_client, c);
}
/* Initialise redrawing with a session. */
void
screen_redraw_start_session(struct screen_redraw_ctx *ctx, struct session *s)
{
struct screen *t = s->curw->window->screen;
screen_redraw_start(ctx, t, tty_write_session, s);
}
/* Initialise for redrawing. */
void
screen_redraw_start(struct screen_redraw_ctx *ctx,
struct screen *s, void (*write)(void *, int, ...), void *data)
{
ctx->write = write;
ctx->data = data;
ctx->s = s;
/*
* Save screen cursor position. Emulation of some TTY_* commands
* requires this to be correct in the screen, so rather than having
* a local copy and just manipulating it, save the screen's values,
* modify them during redraw, and restore them when finished.
*/
ctx->saved_cx = s->cx;
ctx->saved_cy = s->cy;
ctx->write(ctx->data, TTY_ATTRIBUTES, s->attr, s->colr);
ctx->write(ctx->data, TTY_SCROLLREGION, 0, screen_last_y(s));
ctx->write(ctx->data, TTY_CURSORMOVE, s->cy, s->cx);
ctx->write(ctx->data, TTY_CURSOROFF);
ctx->write(ctx->data, TTY_MOUSEOFF);
}
/* Finish redrawing. */
void
screen_redraw_stop(struct screen_redraw_ctx *ctx)
{
struct screen *s = ctx->s;
s->cx = ctx->saved_cx;
s->cy = ctx->saved_cy;
ctx->write(ctx->data, TTY_ATTRIBUTES, s->attr, s->colr);
ctx->write(ctx->data, TTY_SCROLLREGION, s->rupper, s->rlower);
ctx->write(ctx->data, TTY_CURSORMOVE, s->cy, s->cx);
if (s->mode & MODE_CURSOR)
ctx->write(ctx->data, TTY_CURSORON);
if (s->mode & MODE_MOUSE)
ctx->write(ctx->data, TTY_MOUSEON);
}
/* Get cell data. */
void
screen_redraw_get_cell(struct screen_redraw_ctx *ctx,
u_int px, u_int py, u_char *data, u_char *attr, u_char *colr)
{
struct screen *s = ctx->s;
screen_get_cell(s, screen_x(s, px), screen_y(s, py), data, attr, colr);
}
/* Move cursor. */
void
screen_redraw_move_cursor(struct screen_redraw_ctx *ctx, u_int px, u_int py)
{
if (px != ctx->s->cx || py != ctx->s->cy) {
ctx->s->cx = px;
ctx->s->cy = py;
ctx->write(ctx->data, TTY_CURSORMOVE, ctx->s->cy, ctx->s->cx);
}
}
/* Set attributes. */
void
screen_redraw_set_attributes(
struct screen_redraw_ctx *ctx, u_int attr, u_int colr)
{
ctx->write(ctx->data, TTY_ATTRIBUTES, attr, colr);
}
/* Write string. */
void printflike2
screen_redraw_write_string(struct screen_redraw_ctx *ctx, const char *fmt, ...)
{
struct screen *s = ctx->s;
va_list ap;
char *msg, *ptr;
va_start(ap, fmt);
xvasprintf(&msg, fmt, ap);
va_end(ap);
for (ptr = msg; *ptr != '\0'; ptr++) {
if (ctx->s->cx > screen_last_x(s))
break;
if (*ptr < 0x20)
continue;
ctx->write(ctx->data, TTY_CHARACTER, *ptr);
ctx->s->cx++;
}
xfree(msg);
}
/* Clear screen. */
void
screen_redraw_clear_screen(struct screen_redraw_ctx *ctx)
{
u_int i;
for (i = 0; i < screen_size_y(ctx->s); i++) {
screen_redraw_move_cursor(ctx, 0, i);
ctx->write(ctx->data, TTY_CLEARLINE);
}
}
/* Redraw single cell. */
void
screen_redraw_cell(struct screen_redraw_ctx *ctx, u_int px, u_int py)
{
u_char data, attr, colr;
screen_redraw_move_cursor(ctx, px, py);
screen_redraw_get_cell(ctx, px, py, &data, &attr, &colr);
ctx->write(ctx->data, TTY_ATTRIBUTES, attr, colr);
ctx->write(ctx->data, TTY_CHARACTER, data);
ctx->s->cx++;
}
/* Redraw area of cells. */
void
screen_redraw_area(
struct screen_redraw_ctx *ctx, u_int px, u_int py, u_int nx, u_int ny)
{
u_int i, j;
for (i = py; i < py + ny; i++) {
for (j = px; j < px + nx; j++)
screen_redraw_cell(ctx, j, i);
}
}
/* Draw set of lines. */
void
screen_redraw_lines(struct screen_redraw_ctx *ctx, u_int py, u_int ny)
{
u_int i, cx, sx;
sx = screen_size_x(ctx->s);
for (i = py; i < py + ny; i++) {
cx = ctx->s->grid_size[screen_y(ctx->s, i)];
if (ctx->s->sel.flag || sx < 5 || cx >= sx - 5) {
screen_redraw_area(ctx, 0, i, screen_size_x(ctx->s), 1);
continue;
}
screen_redraw_area(ctx, 0, i, cx, 1);
screen_redraw_move_cursor(ctx, cx, i);
screen_redraw_set_attributes(
ctx, SCREEN_DEFATTR, SCREEN_DEFCOLR);
ctx->write(ctx->data, TTY_CLEARENDOFLINE);
}
}
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