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/* $Id: screen-redraw.c,v 1.14 2008-12-08 16:19:51 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"
/* 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. XXX.
*/
ctx->saved_cx = s->cx;
ctx->saved_cy = s->cy;
ctx->write(ctx->data, TTY_SCROLLREGION, 0, screen_size_y(s) - 1);
ctx->write(ctx->data, TTY_CURSORMOVE, s->cx, s->cy);
ctx->write(ctx->data, TTY_CURSORMODE, 0);
ctx->write(ctx->data, TTY_MOUSEMODE, 0);
}
/* 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_SCROLLREGION, s->rupper, s->rlower);
ctx->write(ctx->data, TTY_CURSORMOVE, s->cx, s->cy);
if (s->mode & MODE_CURSOR)
ctx->write(ctx->data, TTY_CURSORMODE, 1);
if (s->mode & MODE_MOUSE)
ctx->write(ctx->data, TTY_MOUSEMODE, 1);
}
/* Write character. */
void
screen_redraw_putc(
struct screen_redraw_ctx *ctx, struct grid_cell *gc, u_char ch)
{
gc->data = ch;
ctx->write(ctx->data, TTY_CELL, gc);
ctx->s->cx++;
}
/* Write string. */
void printflike3
screen_redraw_puts(
struct screen_redraw_ctx *ctx, struct grid_cell *gc, const char *fmt, ...)
{
va_list ap;
char *msg, *ptr;
va_start(ap, fmt);
xvasprintf(&msg, fmt, ap);
va_end(ap);
for (ptr = msg; *ptr != '\0'; ptr++)
screen_redraw_putc(ctx, gc, (u_char) *ptr);
xfree(msg);
}
/* Redraw single cell. */
void
screen_redraw_cell(struct screen_redraw_ctx *ctx, u_int px, u_int py)
{
const struct grid_cell *gc;
struct grid_cell tc;
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->cx, ctx->s->cy);
}
gc = grid_view_peek_cell(ctx->s->grid, px, py);
if (screen_check_selection(ctx->s, px, py)) {
memcpy(&tc, &ctx->s->sel.cell, sizeof tc);
tc.data = gc->data;
ctx->write(ctx->data, TTY_CELL, &tc);
} else
ctx->write(ctx->data, TTY_CELL, gc);
ctx->s->cx++;
}
/* Draw set of lines. */
void
screen_redraw_lines(struct screen_redraw_ctx *ctx, u_int py, u_int ny)
{
u_int i, j;
for (j = py; j < py + ny; j++) {
for (i = 0; i < screen_size_x(ctx->s); i++)
screen_redraw_cell(ctx, i, j);
}
}
/* Draw set of columns. */
void
screen_redraw_columns(struct screen_redraw_ctx *ctx, u_int px, u_int nx)
{
u_int i, j;
for (j = 0; j < screen_size_y(ctx->s); j++) {
for (i = px; i < px + nx; i++)
screen_redraw_cell(ctx, i, j);
}
}
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