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grid.c
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grid.c
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/* $OpenBSD$ */
/*
* Copyright (c) 2008 Nicholas Marriott <[email protected]>
*
* 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 <stdlib.h>
#include <string.h>
#include "tmux.h"
/*
* Grid data. This is the basic data structure that represents what is shown on
* screen.
*
* A grid is a grid of cells (struct grid_cell). Lines are not allocated until
* cells in that line are written to. The grid is split into history and
* viewable data with the history starting at row (line) 0 and extending to
* (hsize - 1); from hsize to hsize + (sy - 1) is the viewable data. All
* functions in this file work on absolute coordinates, grid-view.c has
* functions which work on the screen data.
*/
/* Default grid cell data. */
const struct grid_cell grid_default_cell = {
{ { ' ' }, 0, 1, 1 }, 0, 0, 8, 8, 0, 0
};
/*
* Padding grid cell data. Padding cells are the only zero width cell that
* appears in the grid - because of this, they are always extended cells.
*/
static const struct grid_cell grid_padding_cell = {
{ { '!' }, 0, 0, 0 }, 0, GRID_FLAG_PADDING, 8, 8, 0, 0
};
/* Cleared grid cell data. */
static const struct grid_cell grid_cleared_cell = {
{ { ' ' }, 0, 1, 1 }, 0, GRID_FLAG_CLEARED, 8, 8, 0, 0
};
static const struct grid_cell_entry grid_cleared_entry = {
GRID_FLAG_CLEARED, { .data = { 0, 8, 8, ' ' } }
};
/* Store cell in entry. */
static void
grid_store_cell(struct grid_cell_entry *gce, const struct grid_cell *gc,
u_char c)
{
gce->flags = (gc->flags & ~GRID_FLAG_CLEARED);
gce->data.fg = gc->fg & 0xff;
if (gc->fg & COLOUR_FLAG_256)
gce->flags |= GRID_FLAG_FG256;
gce->data.bg = gc->bg & 0xff;
if (gc->bg & COLOUR_FLAG_256)
gce->flags |= GRID_FLAG_BG256;
gce->data.attr = gc->attr;
gce->data.data = c;
}
/* Check if a cell should be an extended cell. */
static int
grid_need_extended_cell(const struct grid_cell_entry *gce,
const struct grid_cell *gc)
{
if (gce->flags & GRID_FLAG_EXTENDED)
return (1);
if (gc->attr > 0xff)
return (1);
if (gc->data.size != 1 || gc->data.width != 1)
return (1);
if ((gc->fg & COLOUR_FLAG_RGB) || (gc->bg & COLOUR_FLAG_RGB))
return (1);
if (gc->us != 0) /* only supports 256 or RGB */
return (1);
if (gc->link != 0)
return (1);
return (0);
}
/* Get an extended cell. */
static void
grid_get_extended_cell(struct grid_line *gl, struct grid_cell_entry *gce,
int flags)
{
u_int at = gl->extdsize + 1;
gl->extddata = xreallocarray(gl->extddata, at, sizeof *gl->extddata);
gl->extdsize = at;
gce->offset = at - 1;
gce->flags = (flags | GRID_FLAG_EXTENDED);
}
/* Set cell as extended. */
static struct grid_extd_entry *
grid_extended_cell(struct grid_line *gl, struct grid_cell_entry *gce,
const struct grid_cell *gc)
{
struct grid_extd_entry *gee;
int flags = (gc->flags & ~GRID_FLAG_CLEARED);
utf8_char uc;
if (~gce->flags & GRID_FLAG_EXTENDED)
grid_get_extended_cell(gl, gce, flags);
else if (gce->offset >= gl->extdsize)
fatalx("offset too big");
gl->flags |= GRID_LINE_EXTENDED;
utf8_from_data(&gc->data, &uc);
gee = &gl->extddata[gce->offset];
gee->data = uc;
gee->attr = gc->attr;
gee->flags = flags;
gee->fg = gc->fg;
gee->bg = gc->bg;
gee->us = gc->us;
gee->link = gc->link;
return (gee);
}
/* Free up unused extended cells. */
static void
grid_compact_line(struct grid_line *gl)
{
int new_extdsize = 0;
struct grid_extd_entry *new_extddata;
struct grid_cell_entry *gce;
struct grid_extd_entry *gee;
u_int px, idx;
if (gl->extdsize == 0)
return;
for (px = 0; px < gl->cellsize; px++) {
gce = &gl->celldata[px];
if (gce->flags & GRID_FLAG_EXTENDED)
new_extdsize++;
}
if (new_extdsize == 0) {
free(gl->extddata);
gl->extddata = NULL;
gl->extdsize = 0;
return;
}
new_extddata = xreallocarray(NULL, new_extdsize, sizeof *gl->extddata);
idx = 0;
for (px = 0; px < gl->cellsize; px++) {
gce = &gl->celldata[px];
if (gce->flags & GRID_FLAG_EXTENDED) {
gee = &gl->extddata[gce->offset];
memcpy(&new_extddata[idx], gee, sizeof *gee);
gce->offset = idx++;
}
}
free(gl->extddata);
gl->extddata = new_extddata;
gl->extdsize = new_extdsize;
}
/* Get line data. */
struct grid_line *
grid_get_line(struct grid *gd, u_int line)
{
return (&gd->linedata[line]);
}
/* Adjust number of lines. */
void
grid_adjust_lines(struct grid *gd, u_int lines)
{
gd->linedata = xreallocarray(gd->linedata, lines, sizeof *gd->linedata);
}
/* Copy default into a cell. */
static void
grid_clear_cell(struct grid *gd, u_int px, u_int py, u_int bg)
{
struct grid_line *gl = &gd->linedata[py];
struct grid_cell_entry *gce = &gl->celldata[px];
struct grid_extd_entry *gee;
memcpy(gce, &grid_cleared_entry, sizeof *gce);
if (bg != 8) {
if (bg & COLOUR_FLAG_RGB) {
grid_get_extended_cell(gl, gce, gce->flags);
gee = grid_extended_cell(gl, gce, &grid_cleared_cell);
gee->bg = bg;
} else {
if (bg & COLOUR_FLAG_256)
gce->flags |= GRID_FLAG_BG256;
gce->data.bg = bg;
}
}
}
/* Check grid y position. */
static int
grid_check_y(struct grid *gd, const char *from, u_int py)
{
if (py >= gd->hsize + gd->sy) {
log_debug("%s: y out of range: %u", from, py);
return (-1);
}
return (0);
}
/* Check if two styles are (visibly) the same. */
int
grid_cells_look_equal(const struct grid_cell *gc1, const struct grid_cell *gc2)
{
if (gc1->fg != gc2->fg || gc1->bg != gc2->bg)
return (0);
if (gc1->attr != gc2->attr || gc1->flags != gc2->flags)
return (0);
if (gc1->link != gc2->link)
return (0);
return (1);
}
/* Compare grid cells. Return 1 if equal, 0 if not. */
int
grid_cells_equal(const struct grid_cell *gc1, const struct grid_cell *gc2)
{
if (!grid_cells_look_equal(gc1, gc2))
return (0);
if (gc1->data.width != gc2->data.width)
return (0);
if (gc1->data.size != gc2->data.size)
return (0);
return (memcmp(gc1->data.data, gc2->data.data, gc1->data.size) == 0);
}
/* Free one line. */
static void
grid_free_line(struct grid *gd, u_int py)
{
free(gd->linedata[py].celldata);
gd->linedata[py].celldata = NULL;
free(gd->linedata[py].extddata);
gd->linedata[py].extddata = NULL;
}
/* Free several lines. */
static void
grid_free_lines(struct grid *gd, u_int py, u_int ny)
{
u_int yy;
for (yy = py; yy < py + ny; yy++)
grid_free_line(gd, yy);
}
/* Create a new grid. */
struct grid *
grid_create(u_int sx, u_int sy, u_int hlimit)
{
struct grid *gd;
gd = xmalloc(sizeof *gd);
gd->sx = sx;
gd->sy = sy;
if (hlimit != 0)
gd->flags = GRID_HISTORY;
else
gd->flags = 0;
gd->hscrolled = 0;
gd->hsize = 0;
gd->hlimit = hlimit;
if (gd->sy != 0)
gd->linedata = xcalloc(gd->sy, sizeof *gd->linedata);
else
gd->linedata = NULL;
return (gd);
}
/* Destroy grid. */
void
grid_destroy(struct grid *gd)
{
grid_free_lines(gd, 0, gd->hsize + gd->sy);
free(gd->linedata);
free(gd);
}
/* Compare grids. */
int
grid_compare(struct grid *ga, struct grid *gb)
{
struct grid_line *gla, *glb;
struct grid_cell gca, gcb;
u_int xx, yy;
if (ga->sx != gb->sx || ga->sy != gb->sy)
return (1);
for (yy = 0; yy < ga->sy; yy++) {
gla = &ga->linedata[yy];
glb = &gb->linedata[yy];
if (gla->cellsize != glb->cellsize)
return (1);
for (xx = 0; xx < gla->cellsize; xx++) {
grid_get_cell(ga, xx, yy, &gca);
grid_get_cell(gb, xx, yy, &gcb);
if (!grid_cells_equal(&gca, &gcb))
return (1);
}
}
return (0);
}
/* Trim lines from the history. */
static void
grid_trim_history(struct grid *gd, u_int ny)
{
grid_free_lines(gd, 0, ny);
memmove(&gd->linedata[0], &gd->linedata[ny],
(gd->hsize + gd->sy - ny) * (sizeof *gd->linedata));
}
/*
* Collect lines from the history if at the limit. Free the top (oldest) 10%
* and shift up.
*/
void
grid_collect_history(struct grid *gd)
{
u_int ny;
if (gd->hsize == 0 || gd->hsize < gd->hlimit)
return;
ny = gd->hlimit / 10;
if (ny < 1)
ny = 1;
if (ny > gd->hsize)
ny = gd->hsize;
/*
* Free the lines from 0 to ny then move the remaining lines over
* them.
*/
grid_trim_history(gd, ny);
gd->hsize -= ny;
if (gd->hscrolled > gd->hsize)
gd->hscrolled = gd->hsize;
}
/* Remove lines from the bottom of the history. */
void
grid_remove_history(struct grid *gd, u_int ny)
{
u_int yy;
if (ny > gd->hsize)
return;
for (yy = 0; yy < ny; yy++)
grid_free_line(gd, gd->hsize + gd->sy - 1 - yy);
gd->hsize -= ny;
}
/*
* Scroll the entire visible screen, moving one line into the history. Just
* allocate a new line at the bottom and move the history size indicator.
*/
void
grid_scroll_history(struct grid *gd, u_int bg)
{
u_int yy;
yy = gd->hsize + gd->sy;
gd->linedata = xreallocarray(gd->linedata, yy + 1,
sizeof *gd->linedata);
grid_empty_line(gd, yy, bg);
gd->hscrolled++;
grid_compact_line(&gd->linedata[gd->hsize]);
gd->hsize++;
}
/* Clear the history. */
void
grid_clear_history(struct grid *gd)
{
grid_trim_history(gd, gd->hsize);
gd->hscrolled = 0;
gd->hsize = 0;
gd->linedata = xreallocarray(gd->linedata, gd->sy,
sizeof *gd->linedata);
}
/* Scroll a region up, moving the top line into the history. */
void
grid_scroll_history_region(struct grid *gd, u_int upper, u_int lower, u_int bg)
{
struct grid_line *gl_history, *gl_upper;
u_int yy;
/* Create a space for a new line. */
yy = gd->hsize + gd->sy;
gd->linedata = xreallocarray(gd->linedata, yy + 1,
sizeof *gd->linedata);
/* Move the entire screen down to free a space for this line. */
gl_history = &gd->linedata[gd->hsize];
memmove(gl_history + 1, gl_history, gd->sy * sizeof *gl_history);
/* Adjust the region and find its start and end. */
upper++;
gl_upper = &gd->linedata[upper];
lower++;
/* Move the line into the history. */
memcpy(gl_history, gl_upper, sizeof *gl_history);
/* Then move the region up and clear the bottom line. */
memmove(gl_upper, gl_upper + 1, (lower - upper) * sizeof *gl_upper);
grid_empty_line(gd, lower, bg);
/* Move the history offset down over the line. */
gd->hscrolled++;
gd->hsize++;
}
/* Expand line to fit to cell. */
static void
grid_expand_line(struct grid *gd, u_int py, u_int sx, u_int bg)
{
struct grid_line *gl;
u_int xx;
gl = &gd->linedata[py];
if (sx <= gl->cellsize)
return;
if (sx < gd->sx / 4)
sx = gd->sx / 4;
else if (sx < gd->sx / 2)
sx = gd->sx / 2;
else if (gd->sx > sx)
sx = gd->sx;
gl->celldata = xreallocarray(gl->celldata, sx, sizeof *gl->celldata);
for (xx = gl->cellsize; xx < sx; xx++)
grid_clear_cell(gd, xx, py, bg);
gl->cellsize = sx;
}
/* Empty a line and set background colour if needed. */
void
grid_empty_line(struct grid *gd, u_int py, u_int bg)
{
memset(&gd->linedata[py], 0, sizeof gd->linedata[py]);
if (!COLOUR_DEFAULT(bg))
grid_expand_line(gd, py, gd->sx, bg);
}
/* Peek at grid line. */
const struct grid_line *
grid_peek_line(struct grid *gd, u_int py)
{
if (grid_check_y(gd, __func__, py) != 0)
return (NULL);
return (&gd->linedata[py]);
}
/* Get cell from line. */
static void
grid_get_cell1(struct grid_line *gl, u_int px, struct grid_cell *gc)
{
struct grid_cell_entry *gce = &gl->celldata[px];
struct grid_extd_entry *gee;
if (gce->flags & GRID_FLAG_EXTENDED) {
if (gce->offset >= gl->extdsize)
memcpy(gc, &grid_default_cell, sizeof *gc);
else {
gee = &gl->extddata[gce->offset];
gc->flags = gee->flags;
gc->attr = gee->attr;
gc->fg = gee->fg;
gc->bg = gee->bg;
gc->us = gee->us;
gc->link = gee->link;
utf8_to_data(gee->data, &gc->data);
}
return;
}
gc->flags = gce->flags & ~(GRID_FLAG_FG256|GRID_FLAG_BG256);
gc->attr = gce->data.attr;
gc->fg = gce->data.fg;
if (gce->flags & GRID_FLAG_FG256)
gc->fg |= COLOUR_FLAG_256;
gc->bg = gce->data.bg;
if (gce->flags & GRID_FLAG_BG256)
gc->bg |= COLOUR_FLAG_256;
gc->us = 0;
utf8_set(&gc->data, gce->data.data);
gc->link = 0;
}
/* Get cell for reading. */
void
grid_get_cell(struct grid *gd, u_int px, u_int py, struct grid_cell *gc)
{
if (grid_check_y(gd, __func__, py) != 0 ||
px >= gd->linedata[py].cellsize)
memcpy(gc, &grid_default_cell, sizeof *gc);
else
grid_get_cell1(&gd->linedata[py], px, gc);
}
/* Set cell at position. */
void
grid_set_cell(struct grid *gd, u_int px, u_int py, const struct grid_cell *gc)
{
struct grid_line *gl;
struct grid_cell_entry *gce;
if (grid_check_y(gd, __func__, py) != 0)
return;
grid_expand_line(gd, py, px + 1, 8);
gl = &gd->linedata[py];
if (px + 1 > gl->cellused)
gl->cellused = px + 1;
gce = &gl->celldata[px];
if (grid_need_extended_cell(gce, gc))
grid_extended_cell(gl, gce, gc);
else
grid_store_cell(gce, gc, gc->data.data[0]);
}
/* Set padding at position. */
void
grid_set_padding(struct grid *gd, u_int px, u_int py)
{
grid_set_cell(gd, px, py, &grid_padding_cell);
}
/* Set cells at position. */
void
grid_set_cells(struct grid *gd, u_int px, u_int py, const struct grid_cell *gc,
const char *s, size_t slen)
{
struct grid_line *gl;
struct grid_cell_entry *gce;
struct grid_extd_entry *gee;
u_int i;
if (grid_check_y(gd, __func__, py) != 0)
return;
grid_expand_line(gd, py, px + slen, 8);
gl = &gd->linedata[py];
if (px + slen > gl->cellused)
gl->cellused = px + slen;
for (i = 0; i < slen; i++) {
gce = &gl->celldata[px + i];
if (grid_need_extended_cell(gce, gc)) {
gee = grid_extended_cell(gl, gce, gc);
gee->data = utf8_build_one(s[i]);
} else
grid_store_cell(gce, gc, s[i]);
}
}
/* Clear area. */
void
grid_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny, u_int bg)
{
struct grid_line *gl;
u_int xx, yy, ox, sx;
if (nx == 0 || ny == 0)
return;
if (px == 0 && nx == gd->sx) {
grid_clear_lines(gd, py, ny, bg);
return;
}
if (grid_check_y(gd, __func__, py) != 0)
return;
if (grid_check_y(gd, __func__, py + ny - 1) != 0)
return;
for (yy = py; yy < py + ny; yy++) {
gl = &gd->linedata[yy];
sx = gd->sx;
if (sx > gl->cellsize)
sx = gl->cellsize;
ox = nx;
if (COLOUR_DEFAULT(bg)) {
if (px > sx)
continue;
if (px + nx > sx)
ox = sx - px;
}
grid_expand_line(gd, yy, px + ox, 8); /* default bg first */
for (xx = px; xx < px + ox; xx++)
grid_clear_cell(gd, xx, yy, bg);
}
}
/* Clear lines. This just frees and truncates the lines. */
void
grid_clear_lines(struct grid *gd, u_int py, u_int ny, u_int bg)
{
u_int yy;
if (ny == 0)
return;
if (grid_check_y(gd, __func__, py) != 0)
return;
if (grid_check_y(gd, __func__, py + ny - 1) != 0)
return;
for (yy = py; yy < py + ny; yy++) {
grid_free_line(gd, yy);
grid_empty_line(gd, yy, bg);
}
if (py != 0)
gd->linedata[py - 1].flags &= ~GRID_LINE_WRAPPED;
}
/* Move a group of lines. */
void
grid_move_lines(struct grid *gd, u_int dy, u_int py, u_int ny, u_int bg)
{
u_int yy;
if (ny == 0 || py == dy)
return;
if (grid_check_y(gd, __func__, py) != 0)
return;
if (grid_check_y(gd, __func__, py + ny - 1) != 0)
return;
if (grid_check_y(gd, __func__, dy) != 0)
return;
if (grid_check_y(gd, __func__, dy + ny - 1) != 0)
return;
/* Free any lines which are being replaced. */
for (yy = dy; yy < dy + ny; yy++) {
if (yy >= py && yy < py + ny)
continue;
grid_free_line(gd, yy);
}
if (dy != 0)
gd->linedata[dy - 1].flags &= ~GRID_LINE_WRAPPED;
memmove(&gd->linedata[dy], &gd->linedata[py],
ny * (sizeof *gd->linedata));
/*
* Wipe any lines that have been moved (without freeing them - they are
* still present).
*/
for (yy = py; yy < py + ny; yy++) {
if (yy < dy || yy >= dy + ny)
grid_empty_line(gd, yy, bg);
}
if (py != 0 && (py < dy || py >= dy + ny))
gd->linedata[py - 1].flags &= ~GRID_LINE_WRAPPED;
}
/* Move a group of cells. */
void
grid_move_cells(struct grid *gd, u_int dx, u_int px, u_int py, u_int nx,
u_int bg)
{
struct grid_line *gl;
u_int xx;
if (nx == 0 || px == dx)
return;
if (grid_check_y(gd, __func__, py) != 0)
return;
gl = &gd->linedata[py];
grid_expand_line(gd, py, px + nx, 8);
grid_expand_line(gd, py, dx + nx, 8);
memmove(&gl->celldata[dx], &gl->celldata[px],
nx * sizeof *gl->celldata);
if (dx + nx > gl->cellused)
gl->cellused = dx + nx;
/* Wipe any cells that have been moved. */
for (xx = px; xx < px + nx; xx++) {
if (xx >= dx && xx < dx + nx)
continue;
grid_clear_cell(gd, xx, py, bg);
}
}
/* Get ANSI foreground sequence. */
static size_t
grid_string_cells_fg(const struct grid_cell *gc, int *values)
{
size_t n;
u_char r, g, b;
n = 0;
if (gc->fg & COLOUR_FLAG_256) {
values[n++] = 38;
values[n++] = 5;
values[n++] = gc->fg & 0xff;
} else if (gc->fg & COLOUR_FLAG_RGB) {
values[n++] = 38;
values[n++] = 2;
colour_split_rgb(gc->fg, &r, &g, &b);
values[n++] = r;
values[n++] = g;
values[n++] = b;
} else {
switch (gc->fg) {
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
values[n++] = gc->fg + 30;
break;
case 8:
values[n++] = 39;
break;
case 90:
case 91:
case 92:
case 93:
case 94:
case 95:
case 96:
case 97:
values[n++] = gc->fg;
break;
}
}
return (n);
}
/* Get ANSI background sequence. */
static size_t
grid_string_cells_bg(const struct grid_cell *gc, int *values)
{
size_t n;
u_char r, g, b;
n = 0;
if (gc->bg & COLOUR_FLAG_256) {
values[n++] = 48;
values[n++] = 5;
values[n++] = gc->bg & 0xff;
} else if (gc->bg & COLOUR_FLAG_RGB) {
values[n++] = 48;
values[n++] = 2;
colour_split_rgb(gc->bg, &r, &g, &b);
values[n++] = r;
values[n++] = g;
values[n++] = b;
} else {
switch (gc->bg) {
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
values[n++] = gc->bg + 40;
break;
case 8:
values[n++] = 49;
break;
case 90:
case 91:
case 92:
case 93:
case 94:
case 95:
case 96:
case 97:
values[n++] = gc->bg + 10;
break;
}
}
return (n);
}
/*
* Returns ANSI code to set particular attributes (colour, bold and so on)
* given a current state.
*/
static void
grid_string_cells_code(const struct grid_cell *lastgc,
const struct grid_cell *gc, char *buf, size_t len, int escape_c0)
{
int oldc[64], newc[64], s[128];
size_t noldc, nnewc, n, i;
u_int attr = gc->attr, lastattr = lastgc->attr;
char tmp[64];
struct {
u_int mask;
u_int code;
} attrs[] = {
{ GRID_ATTR_BRIGHT, 1 },
{ GRID_ATTR_DIM, 2 },
{ GRID_ATTR_ITALICS, 3 },
{ GRID_ATTR_UNDERSCORE, 4 },
{ GRID_ATTR_BLINK, 5 },
{ GRID_ATTR_REVERSE, 7 },
{ GRID_ATTR_HIDDEN, 8 },
{ GRID_ATTR_STRIKETHROUGH, 9 },
{ GRID_ATTR_UNDERSCORE_2, 42 },
{ GRID_ATTR_UNDERSCORE_3, 43 },
{ GRID_ATTR_UNDERSCORE_4, 44 },
{ GRID_ATTR_UNDERSCORE_5, 45 },
{ GRID_ATTR_OVERLINE, 53 },
};
n = 0;
/* If any attribute is removed, begin with 0. */
for (i = 0; i < nitems(attrs); i++) {
if (!(attr & attrs[i].mask) && (lastattr & attrs[i].mask)) {
s[n++] = 0;
lastattr &= GRID_ATTR_CHARSET;
break;
}
}
/* For each attribute that is newly set, add its code. */
for (i = 0; i < nitems(attrs); i++) {
if ((attr & attrs[i].mask) && !(lastattr & attrs[i].mask))
s[n++] = attrs[i].code;
}
/* Write the attributes. */
*buf = '\0';
if (n > 0) {
if (escape_c0)
strlcat(buf, "\\033[", len);
else
strlcat(buf, "\033[", len);
for (i = 0; i < n; i++) {
if (s[i] < 10)
xsnprintf(tmp, sizeof tmp, "%d", s[i]);
else {
xsnprintf(tmp, sizeof tmp, "%d:%d", s[i] / 10,
s[i] % 10);
}
strlcat(buf, tmp, len);
if (i + 1 < n)
strlcat(buf, ";", len);
}
strlcat(buf, "m", len);
}
/* If the foreground colour changed, write its parameters. */
nnewc = grid_string_cells_fg(gc, newc);
noldc = grid_string_cells_fg(lastgc, oldc);
if (nnewc != noldc ||
memcmp(newc, oldc, nnewc * sizeof newc[0]) != 0 ||
(n != 0 && s[0] == 0)) {
if (escape_c0)
strlcat(buf, "\\033[", len);
else
strlcat(buf, "\033[", len);
for (i = 0; i < nnewc; i++) {
if (i + 1 < nnewc)
xsnprintf(tmp, sizeof tmp, "%d;", newc[i]);
else
xsnprintf(tmp, sizeof tmp, "%d", newc[i]);
strlcat(buf, tmp, len);
}
strlcat(buf, "m", len);
}
/* If the background colour changed, append its parameters. */
nnewc = grid_string_cells_bg(gc, newc);
noldc = grid_string_cells_bg(lastgc, oldc);
if (nnewc != noldc ||
memcmp(newc, oldc, nnewc * sizeof newc[0]) != 0 ||
(n != 0 && s[0] == 0)) {
if (escape_c0)
strlcat(buf, "\\033[", len);
else
strlcat(buf, "\033[", len);
for (i = 0; i < nnewc; i++) {
if (i + 1 < nnewc)
xsnprintf(tmp, sizeof tmp, "%d;", newc[i]);
else
xsnprintf(tmp, sizeof tmp, "%d", newc[i]);
strlcat(buf, tmp, len);
}
strlcat(buf, "m", len);
}
/* Append shift in/shift out if needed. */
if ((attr & GRID_ATTR_CHARSET) && !(lastattr & GRID_ATTR_CHARSET)) {
if (escape_c0)
strlcat(buf, "\\016", len); /* SO */
else
strlcat(buf, "\016", len); /* SO */
}
if (!(attr & GRID_ATTR_CHARSET) && (lastattr & GRID_ATTR_CHARSET)) {
if (escape_c0)
strlcat(buf, "\\017", len); /* SI */
else
strlcat(buf, "\017", len); /* SI */
}
}
/* Convert cells into a string. */
char *
grid_string_cells(struct grid *gd, u_int px, u_int py, u_int nx,
struct grid_cell **lastgc, int with_codes, int escape_c0, int trim)
{
struct grid_cell gc;
static struct grid_cell lastgc1;
const char *data;
char *buf, code[128];
size_t len, off, size, codelen;
u_int xx;
const struct grid_line *gl;
if (lastgc != NULL && *lastgc == NULL) {
memcpy(&lastgc1, &grid_default_cell, sizeof lastgc1);
*lastgc = &lastgc1;
}
len = 128;
buf = xmalloc(len);
off = 0;
gl = grid_peek_line(gd, py);
for (xx = px; xx < px + nx; xx++) {
if (gl == NULL || xx >= gl->cellsize)
break;
grid_get_cell(gd, xx, py, &gc);
if (gc.flags & GRID_FLAG_PADDING)
continue;
if (with_codes) {
grid_string_cells_code(*lastgc, &gc, code, sizeof code,
escape_c0);
codelen = strlen(code);
memcpy(*lastgc, &gc, sizeof **lastgc);
} else
codelen = 0;
data = gc.data.data;
size = gc.data.size;
if (escape_c0 && size == 1 && *data == '\\') {
data = "\\\\";