tmux/screen.c

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/* $Id: screen.c,v 1.33 2007-11-21 19:53:56 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"
/*
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* Virtual screen.
*/
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/* Colour to string. */
const char *
screen_colourstring(u_char c)
{
switch (c) {
case 0:
return ("black");
case 1:
return ("red");
case 2:
return ("green");
case 3:
return ("yellow");
case 4:
return ("blue");
case 5:
return ("magenta");
case 6:
return ("cyan");
case 7:
return ("white");
case 8:
return ("default");
}
return (NULL);
}
/* String to colour. */
u_char
screen_stringcolour(const char *s)
{
if (strcasecmp(s, "black") == 0 || (s[0] == '0' && s[1] == '\0'))
return (0);
if (strcasecmp(s, "red") == 0 || (s[0] == '1' && s[1] == '\0'))
return (1);
if (strcasecmp(s, "green") == 0 || (s[0] == '2' && s[1] == '\0'))
return (2);
if (strcasecmp(s, "yellow") == 0 || (s[0] == '3' && s[1] == '\0'))
return (3);
if (strcasecmp(s, "blue") == 0 || (s[0] == '4' && s[1] == '\0'))
return (4);
if (strcasecmp(s, "magenta") == 0 || (s[0] == '5' && s[1] == '\0'))
return (5);
if (strcasecmp(s, "cyan") == 0 || (s[0] == '6' && s[1] == '\0'))
return (6);
if (strcasecmp(s, "white") == 0 || (s[0] == '7' && s[1] == '\0'))
return (7);
if (strcasecmp(s, "default") == 0 || (s[0] == '8' && s[1] == '\0'))
return (8);
return (255);
}
/* Create a new screen. */
void
screen_create(struct screen *s, u_int dx, u_int dy)
{
s->dx = dx;
s->dy = dy;
s->cx = 0;
s->cy = 0;
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s->rupper = 0;
s->rlower = s->dy - 1;
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s->hsize = 0;
s->hlimit = SHRT_MAX;
s->attr = SCREEN_DEFATTR;
s->colr = SCREEN_DEFCOLR;
s->mode = MODE_CURSOR;
*s->title = '\0';
s->grid_data = xmalloc(dy * (sizeof *s->grid_data));
s->grid_attr = xmalloc(dy * (sizeof *s->grid_attr));
s->grid_colr = xmalloc(dy * (sizeof *s->grid_colr));
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s->grid_size = xmalloc(dy * (sizeof *s->grid_size));
screen_make_lines(s, 0, dy);
}
/* Resize screen. */
void
screen_resize(struct screen *s, u_int sx, u_int sy)
{
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u_int i, ox, oy, ny, my;
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if (sx < 1)
sx = 1;
if (sy < 1)
sy = 1;
ox = s->dx;
oy = s->dy;
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if (sx == ox && sy == oy)
return;
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/*
* X dimension.
*/
if (sx != ox) {
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/* Resize on-screen lines. */
for (i = s->hsize; i < s->hsize + oy; i++) {
if (sx > s->grid_size[i]) {
s->grid_data[i] =
xrealloc(s->grid_data[i], sx, 1);
s->grid_attr[i] =
xrealloc(s->grid_attr[i], sx, 1);
s->grid_colr[i] =
xrealloc(s->grid_colr[i], sx, 1);
s->grid_size[i] = sx;
}
if (sx > ox) {
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screen_fill_cells(s, ox, i, sx - ox,
SCREEN_DEFDATA, SCREEN_DEFATTR,
SCREEN_DEFCOLR);
}
}
if (s->cx >= sx)
s->cx = sx - 1;
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s->dx = sx;
}
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/*
* Y dimension.
*/
if (sy == oy)
return;
/* Size decreasing. */
if (sy < oy) {
ny = oy - sy;
if (s->cy != 0) {
/*
* The cursor is not at the start. Try to remove as
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* many lines as possible from the top. (Up to the
* cursor line.)
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*/
my = s->cy;
if (my > ny)
my = ny;
screen_free_lines(s, s->hsize, my);
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screen_move_lines(s, s->hsize, s->hsize + my, oy - my);
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s->cy -= my;
oy -= my;
}
ny = oy - sy;
if (ny > 0) {
/*
* Remove any remaining lines from the bottom.
*/
screen_free_lines(s, s->hsize + oy - ny, ny);
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if (s->cy >= sy)
s->cy = sy - 1;
}
}
/* Resize line arrays. */
ny = s->hsize + sy;
s->grid_data = xrealloc(s->grid_data, ny, sizeof *s->grid_data);
s->grid_attr = xrealloc(s->grid_attr, ny, sizeof *s->grid_attr);
s->grid_colr = xrealloc(s->grid_colr, ny, sizeof *s->grid_colr);
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s->grid_size = xrealloc(s->grid_size, ny, sizeof *s->grid_size);
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s->dy = sy;
/* Size increasing. */
if (sy > oy)
screen_make_lines(s, s->hsize + oy, sy - oy);
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s->rupper = 0;
s->rlower = s->dy - 1;
}
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/* Destroy a screen. */
void
screen_destroy(struct screen *s)
{
screen_free_lines(s, 0, s->dy);
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xfree(s->grid_data);
xfree(s->grid_attr);
xfree(s->grid_colr);
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xfree(s->grid_size);
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}
/* Initialise drawing. */
void
screen_draw_start(struct screen_draw_ctx *ctx,
struct screen *s, struct buffer *b, u_int ox, u_int oy)
{
ctx->s = s;
ctx->b = b;
ctx->ox = ox;
ctx->oy = oy;
ctx->cx = s->cx;
ctx->cy = s->cy;
ctx->attr = s->attr;
ctx->colr = s->colr;
input_store_two(b, CODE_SCROLLREGION, 1, screen_size_y(s));
if (s->mode & MODE_CURSOR)
input_store_zero(b, CODE_CURSOROFF);
}
/* Finalise drawing. */
void
screen_draw_stop(struct screen_draw_ctx *ctx)
{
struct screen *s = ctx->s;
struct buffer *b = ctx->b;
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input_store_two(b, CODE_SCROLLREGION, s->rupper + 1, s->rlower + 1);
if (ctx->cx != s->cx || ctx->cy != s->cy)
input_store_two(b, CODE_CURSORMOVE, s->cy + 1, s->cx + 1);
if (ctx->attr != s->attr || ctx->colr != s->colr)
input_store_two(b, CODE_ATTRIBUTES, s->attr, s->colr);
if (!(s->mode & MODE_BACKGROUND) && s->mode & MODE_CURSOR)
input_store_zero(b, CODE_CURSORON);
}
/* Get cell data. */
void
screen_draw_get_cell(struct screen_draw_ctx *ctx,
u_int px, u_int py, u_char *data, u_char *attr, u_char *colr)
{
struct screen *s = ctx->s;
u_int cx, cy;
cx = ctx->ox + px;
cy = screen_y(s, py) - ctx->oy;
if (cx >= s->grid_size[cy]) {
*data = SCREEN_DEFDATA;
*attr = SCREEN_DEFATTR;
*colr = SCREEN_DEFCOLR;
} else {
*data = s->grid_data[cy][cx];
*attr = s->grid_attr[cy][cx];
*colr = s->grid_colr[cy][cx];
}
}
/* Move cursor. */
void
screen_draw_move(struct screen_draw_ctx *ctx, u_int px, u_int py)
{
if (px == ctx->cx && py == ctx->cy)
return;
input_store_two(ctx->b, CODE_CURSORMOVE, py + 1, px + 1);
ctx->cx = px;
ctx->cy = py;
}
/* Set attributes. */
void
screen_draw_set_attributes(
struct screen_draw_ctx *ctx, u_char attr, u_char colr)
{
if (attr != ctx->attr || colr != ctx->colr) {
input_store_two(ctx->b, CODE_ATTRIBUTES, attr, colr);
ctx->attr = attr;
ctx->colr = colr;
}
}
/* Draw single cell. */
void
screen_draw_cell(struct screen_draw_ctx *ctx, u_int px, u_int py)
{
struct buffer *b = ctx->b;
u_char data, attr, colr;
screen_draw_move(ctx, px, py);
screen_draw_get_cell(ctx, px, py, &data, &attr, &colr);
screen_draw_set_attributes(ctx, attr, colr);
input_store8(b, data);
/*
* Don't try to wrap as it will cause problems when screen is smaller
* than client.
*/
ctx->cx++;
}
/* Draw range of cells. */
void
screen_draw_cells(struct screen_draw_ctx *ctx, u_int px, u_int py, u_int nx)
{
u_int i;
for (i = px; i < px + nx; i++)
screen_draw_cell(ctx, i, py);
}
/* Draw single column. */
void
screen_draw_column(struct screen_draw_ctx *ctx, u_int px)
{
u_int i;
for (i = 0; i < screen_size_y(ctx->s); i++)
screen_draw_cell(ctx, px, i);
}
/* Draw single line. */
void
screen_draw_line(struct screen_draw_ctx *ctx, u_int py)
{
screen_draw_cells(ctx, 0, py, screen_size_x(ctx->s));
}
/* Draw set of lines. */
void
screen_draw_lines(struct screen_draw_ctx *ctx, u_int py, u_int ny)
{
u_int i;
for (i = py; i < py + ny; i++)
screen_draw_line(ctx, i);
}
/* Draw entire screen. */
void
screen_draw_screen(struct screen_draw_ctx *ctx)
{
screen_draw_lines(ctx, 0, screen_size_y(ctx->s));
}
/* Create a range of lines. */
void
screen_make_lines(struct screen *s, u_int py, u_int ny)
{
u_int i;
for (i = py; i < py + ny; i++) {
s->grid_data[i] = xmalloc(s->dx);
s->grid_attr[i] = xmalloc(s->dx);
s->grid_colr[i] = xmalloc(s->dx);
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s->grid_size[i] = s->dx;
}
screen_fill_lines(
s, py, ny, SCREEN_DEFDATA, SCREEN_DEFATTR, SCREEN_DEFCOLR);
}
/* Free a range of ny lines at py. */
void
screen_free_lines(struct screen *s, u_int py, u_int ny)
{
u_int i;
for (i = py; i < py + ny; i++) {
xfree(s->grid_data[i]);
xfree(s->grid_attr[i]);
xfree(s->grid_colr[i]);
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s->grid_size[i] = 0;
}
}
/* Move a range of lines. */
void
screen_move_lines(struct screen *s, u_int dy, u_int py, u_int ny)
{
memmove(
&s->grid_data[dy], &s->grid_data[py], ny * (sizeof *s->grid_data));
memmove(
&s->grid_attr[dy], &s->grid_attr[py], ny * (sizeof *s->grid_attr));
memmove(
&s->grid_colr[dy], &s->grid_colr[py], ny * (sizeof *s->grid_colr));
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memmove(
&s->grid_size[dy], &s->grid_size[py], ny * (sizeof *s->grid_size));
}
/* Fill a range of lines. */
void
screen_fill_lines(
struct screen *s, u_int py, u_int ny, u_char data, u_char attr, u_char colr)
{
u_int i;
for (i = py; i < py + ny; i++)
screen_fill_cells(s, 0, i, s->dx, data, attr, colr);
}
/* Fill a range of cells. */
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void
screen_fill_cells(struct screen *s,
u_int px, u_int py, u_int nx, u_char data, u_char attr, u_char colr)
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{
memset(&s->grid_data[py][px], data, nx);
memset(&s->grid_attr[py][px], attr, nx);
memset(&s->grid_colr[py][px], colr, nx);
}