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tmux/grid.c
Nicholas Marriott ede2dd2d3a Typo in grid_duplicate_lines (sy for dy) causing it to write into the wrong 
place when copying UTF-8 data. Found by Dan Colish.
2009-07-17 07:45:08 +00:00

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/* $Id: grid.c,v 1.26 2009-07-17 07:45:08 nicm Exp $ */
/*
* Copyright (c) 2008 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"
/*
* 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, 0, 8, 8, ' ' };
#define grid_put_cell(gd, px, py, gc) do { \
memcpy(&gd->data[py][px], gc, sizeof gd->data[py][px]); \
} while (0)
#define grid_put_utf8(gd, px, py, gc) do { \
memcpy(&gd->udata[py][px], gc, sizeof gd->udata[py][px]); \
} while (0)
int grid_check_x(struct grid *, u_int);
int grid_check_y(struct grid *, u_int);
#ifdef DEBUG
int
grid_check_x(struct grid *gd, u_int px)
{
if ((px) >= (gd)->sx)
log_fatalx("x out of range: %u", px);
return (0);
}
int
grid_check_y(struct grid *gd, u_int py)
{
if ((py) >= (gd)->hsize + (gd)->sy)
log_fatalx("y out of range: %u", py);
return (0);
}
#else
int
grid_check_x(struct grid *gd, u_int px)
{
if ((px) >= (gd)->sx) {
log_debug("x out of range: %u", px);
return (-1);
}
return (0);
}
int
grid_check_y(struct grid *gd, u_int py)
{
if ((py) >= (gd)->hsize + (gd)->sy) {
log_debug("y out of range: %u", py);
return (-1);
}
return (0);
}
#endif
/* 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;
gd->flags = GRID_HISTORY;
gd->hsize = 0;
gd->hlimit = hlimit;
gd->size = xcalloc(gd->sy, sizeof *gd->size);
gd->data = xcalloc(gd->sy, sizeof *gd->data);
gd->usize = xcalloc(gd->sy, sizeof *gd->usize);
gd->udata = xcalloc(gd->sy, sizeof *gd->udata);
return (gd);
}
/* Destroy grid. */
void
grid_destroy(struct grid *gd)
{
u_int yy;
for (yy = 0; yy < gd->hsize + gd->sy; yy++) {
if (gd->udata[yy] != NULL)
xfree(gd->udata[yy]);
if (gd->data[yy] != NULL)
xfree(gd->data[yy]);
}
if (gd->udata != NULL)
xfree(gd->udata);
if (gd->usize != NULL)
xfree(gd->usize);
if (gd->data != NULL)
xfree(gd->data);
if (gd->size != NULL)
xfree(gd->size);
xfree(gd);
}
/* Compare grids. */
int
grid_compare(struct grid *ga, struct grid *gb)
{
struct grid_cell *gca, *gcb;
struct grid_utf8 *gua, *gub;
u_int xx, yy;
if (ga->sx != gb->sx || ga->sy != ga->sy)
return (1);
for (yy = 0; yy < ga->sy; yy++) {
if (ga->size[yy] != gb->size[yy])
return (1);
for (xx = 0; xx < ga->sx; xx++) {
gca = &ga->data[yy][xx];
gcb = &gb->data[yy][xx];
if (memcmp(gca, gcb, sizeof (struct grid_cell)) != 0)
return (1);
if (!(gca->flags & GRID_FLAG_UTF8))
continue;
gua = &ga->udata[yy][xx];
gub = &gb->udata[yy][xx];
if (memcmp(gua, gub, sizeof (struct grid_utf8)) != 0)
return (1);
}
}
return (0);
}
/* Scroll a line into the history. */
void
grid_scroll_line(struct grid *gd)
{
u_int yy;
GRID_DEBUG(gd, "");
if (gd->hsize >= gd->hlimit) {
/* If the limit is hit, free the bottom 10% and shift up. */
yy = gd->hlimit / 10;
if (yy < 1)
yy = 1;
grid_move_lines(gd, 0, yy, gd->hsize + gd->sy - yy);
gd->hsize -= yy;
}
yy = gd->hsize + gd->sy;
gd->size = xrealloc(gd->size, yy + 1, sizeof *gd->size);
gd->size[yy] = 0;
gd->data = xrealloc(gd->data, yy + 1, sizeof *gd->data);
gd->data[yy] = NULL;
gd->usize = xrealloc(gd->usize, yy + 1, sizeof *gd->usize);
gd->usize[yy] = 0;
gd->udata = xrealloc(gd->udata, yy + 1, sizeof *gd->udata);
gd->udata[yy] = NULL;
gd->hsize++;
}
/* Reduce line to fit to cell. */
void
grid_reduce_line(struct grid *gd, u_int py, u_int sx)
{
if (sx < gd->size[py]) {
gd->data[py] = xrealloc(gd->data[py], sx, sizeof **gd->data);
gd->size[py] = sx;
}
if (sx < gd->usize[py]) {
gd->udata[py] = xrealloc(gd->udata[py], sx, sizeof **gd->udata);
gd->usize[py] = sx;
}
}
/* Expand line to fit to cell. */
void
grid_expand_line(struct grid *gd, u_int py, u_int sx)
{
u_int xx;
if (sx <= gd->size[py])
return;
gd->data[py] = xrealloc(gd->data[py], sx, sizeof **gd->data);
for (xx = gd->size[py]; xx < sx; xx++)
grid_put_cell(gd, xx, py, &grid_default_cell);
gd->size[py] = sx;
}
/* Expand line to fit to cell for UTF-8. */
void
grid_expand_line_utf8(struct grid *gd, u_int py, u_int sx)
{
if (sx <= gd->usize[py])
return;
gd->udata[py] = xrealloc(gd->udata[py], sx, sizeof **gd->udata);
gd->usize[py] = sx;
}
/* Get cell for reading. */
const struct grid_cell *
grid_peek_cell(struct grid *gd, u_int px, u_int py)
{
if (grid_check_x(gd, px) != 0)
return (&grid_default_cell);
if (grid_check_y(gd, py) != 0)
return (&grid_default_cell);
if (px >= gd->size[py])
return (&grid_default_cell);
return (&gd->data[py][px]);
}
/* Get cell at relative position (for writing). */
struct grid_cell *
grid_get_cell(struct grid *gd, u_int px, u_int py)
{
if (grid_check_x(gd, px) != 0)
return (NULL);
if (grid_check_y(gd, py) != 0)
return (NULL);
grid_expand_line(gd, py, px + 1);
return (&gd->data[py][px]);
}
/* Set cell at relative position. */
void
grid_set_cell(
struct grid *gd, u_int px, u_int py, const struct grid_cell *gc)
{
if (grid_check_x(gd, px) != 0)
return;
if (grid_check_y(gd, py) != 0)
return;
grid_expand_line(gd, py, px + 1);
grid_put_cell(gd, px, py, gc);
}
/* Get UTF-8 for reading. */
const struct grid_utf8 *
grid_peek_utf8(struct grid *gd, u_int px, u_int py)
{
if (grid_check_x(gd, px) != 0)
return (NULL);
if (grid_check_y(gd, py) != 0)
return (NULL);
if (px >= gd->usize[py])
return (NULL);
return (&gd->udata[py][px]);
}
/* Get utf8 at relative position (for writing). */
struct grid_utf8 *
grid_get_utf8(struct grid *gd, u_int px, u_int py)
{
if (grid_check_x(gd, px) != 0)
return (NULL);
if (grid_check_y(gd, py) != 0)
return (NULL);
grid_expand_line_utf8(gd, py, px + 1);
return (&gd->udata[py][px]);
}
/* Set utf8 at relative position. */
void
grid_set_utf8(
struct grid *gd, u_int px, u_int py, const struct grid_utf8 *gc)
{
if (grid_check_x(gd, px) != 0)
return;
if (grid_check_y(gd, py) != 0)
return;
grid_expand_line_utf8(gd, py, px + 1);
grid_put_utf8(gd, px, py, gc);
}
/*
* Clear area. Note this is different from a fill as it just omits unallocated
* cells.
*/
void
grid_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny)
{
u_int xx, yy;
GRID_DEBUG(gd, "px=%u, py=%u, nx=%u, ny=%u", px, py, nx, ny);
if (nx == 0 || ny == 0)
return;
if (px == 0 && nx == gd->sx) {
grid_clear_lines(gd, py, ny);
return;
}
if (grid_check_x(gd, px) != 0)
return;
if (grid_check_x(gd, px + nx - 1) != 0)
return;
if (grid_check_y(gd, py) != 0)
return;
if (grid_check_y(gd, py + ny - 1) != 0)
return;
for (yy = py; yy < py + ny; yy++) {
for (xx = px; xx < px + nx; xx++) {
if (xx >= gd->size[yy])
break;
grid_put_cell(gd, xx, yy, &grid_default_cell);
}
}
}
/* Clear lines. This just frees and truncates the lines. */
void
grid_clear_lines(struct grid *gd, u_int py, u_int ny)
{
u_int yy;
GRID_DEBUG(gd, "py=%u, ny=%u", py, ny);
if (ny == 0)
return;
if (grid_check_y(gd, py) != 0)
return;
if (grid_check_y(gd, py + ny - 1) != 0)
return;
for (yy = py; yy < py + ny; yy++) {
if (gd->data[yy] != NULL) {
xfree(gd->data[yy]);
gd->data[yy] = NULL;
gd->size[yy] = 0;
}
if (gd->udata[yy] != NULL) {
xfree(gd->udata[yy]);
gd->udata[yy] = NULL;
gd->usize[yy] = 0;
}
}
}
/* Move a group of lines. */
void
grid_move_lines(struct grid *gd, u_int dy, u_int py, u_int ny)
{
u_int yy;
GRID_DEBUG(gd, "dy=%u, py=%u, ny=%u", dy, py, ny);
if (ny == 0 || py == dy)
return;
if (grid_check_y(gd, py) != 0)
return;
if (grid_check_y(gd, py + ny - 1) != 0)
return;
if (grid_check_y(gd, dy) != 0)
return;
if (grid_check_y(gd, 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_clear_lines(gd, yy, 1);
}
memmove(&gd->data[dy], &gd->data[py], ny * (sizeof *gd->data));
memmove(&gd->size[dy], &gd->size[py], ny * (sizeof *gd->size));
memmove(&gd->udata[dy], &gd->udata[py], ny * (sizeof *gd->udata));
memmove(&gd->usize[dy], &gd->usize[py], ny * (sizeof *gd->usize));
/* Wipe any lines that have been moved (without freeing them). */
for (yy = py; yy < py + ny; yy++) {
if (yy >= dy && yy < dy + ny)
continue;
gd->data[yy] = NULL;
gd->size[yy] = 0;
gd->udata[yy] = NULL;
gd->usize[yy] = 0;
}
}
/* 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 xx;
GRID_DEBUG(gd, "dx=%u, px=%u, py=%u, nx=%u", dx, px, py, nx);
if (nx == 0 || px == dx)
return;
if (grid_check_x(gd, px) != 0)
return;
if (grid_check_x(gd, px + nx - 1) != 0)
return;
if (grid_check_x(gd, dx + nx - 1) != 0)
return;
if (grid_check_y(gd, py) != 0)
return;
grid_expand_line(gd, py, px + nx);
grid_expand_line(gd, py, dx + nx);
memmove(&gd->data[py][dx], &gd->data[py][px], nx * (sizeof **gd->data));
if (gd->udata[py] != NULL) {
grid_expand_line_utf8(gd, py, px + nx);
grid_expand_line_utf8(gd, py, dx + nx);
memmove(&gd->udata[py][dx],
&gd->udata[py][px], nx * (sizeof **gd->udata));
}
/* Wipe any cells that have been moved. */
for (xx = px; xx < px + nx; xx++) {
if (xx >= dx && xx < dx + nx)
continue;
grid_put_cell(gd, xx, py, &grid_default_cell);
}
}
/* Convert cells into a string. */
char *
grid_string_cells(struct grid *gd, u_int px, u_int py, u_int nx)
{
const struct grid_cell *gc;
const struct grid_utf8 *gu;
char *buf;
size_t len, off;
u_int xx, i;
GRID_DEBUG(gd, "px=%u, py=%u, nx=%u", px, py, nx);
len = 128;
buf = xmalloc(len);
off = 0;
for (xx = px; xx < px + nx; xx++) {
gc = grid_peek_cell(gd, xx, py);
if (gc->flags & GRID_FLAG_PADDING)
continue;
if (gc->flags & GRID_FLAG_UTF8) {
while (len < off + UTF8_SIZE + 1) {
buf = xrealloc(buf, 2, len);
len *= 2;
}
gu = grid_peek_utf8(gd, xx, py);
for (i = 0; i < UTF8_SIZE; i++) {
if (gu->data[i] == 0xff)
break;
buf[off++] = gu->data[i];
}
} else {
while (len < off + 2) {
buf = xrealloc(buf, 2, len);
len *= 2;
}
buf[off++] = gc->data;
}
}
while (off > 0 && buf[off - 1] == ' ')
off--;
buf[off] = '\0';
return (buf);
}
/*
* Duplicate a set of lines between two grids. If there aren't enough lines in
* either source or destination, the number of lines is limited to the number
* available.
*/
void
grid_duplicate_lines(
struct grid *dst, u_int dy, struct grid *src, u_int sy, u_int ny)
{
u_int yy;
GRID_DEBUG(src, "dy=%u, sy=%u, ny=%u", dy, sy, ny);
if (dy + ny > dst->hsize + dst->sy)
ny = dst->hsize + dst->sy - dy;
if (sy + ny > src->hsize + src->sy)
ny = src->hsize + src->sy - sy;
grid_clear_lines(dst, dy, ny);
for (yy = 0; yy < ny; yy++) {
dst->size[dy] = src->size[sy];
if (src->size[sy] == 0)
dst->data[dy] = NULL;
else {
dst->data[dy] = xcalloc(
src->size[sy], sizeof **dst->data);
memcpy(dst->data[dy], src->data[sy],
src->size[sy] * (sizeof **dst->data));
}
dst->usize[dy] = src->usize[sy];
if (src->usize[sy] == 0)
dst->udata[dy] = NULL;
else {
dst->udata[dy] = xcalloc(
src->usize[sy], sizeof **dst->udata);
memcpy(dst->udata[dy], src->udata[sy],
src->usize[sy] * (sizeof **dst->udata));
}
sy++; dy++;
}
}
/* $Id: grid.c,v 1.26 2009-07-17 07:45:08 nicm Exp $ */
/*
* Copyright (c) 2008 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"
/*
* 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, 0, 8, 8, ' ' };
#define grid_put_cell(gd, px, py, gc) do { \
memcpy(&gd->data[py][px], gc, sizeof gd->data[py][px]); \
} while (0)
#define grid_put_utf8(gd, px, py, gc) do { \
memcpy(&gd->udata[py][px], gc, sizeof gd->udata[py][px]); \
} while (0)
int grid_check_x(struct grid *, u_int);
int grid_check_y(struct grid *, u_int);
#ifdef DEBUG
int
grid_check_x(struct grid *gd, u_int px)
{
if ((px) >= (gd)->sx)
log_fatalx("x out of range: %u", px);
return (0);
}
int
grid_check_y(struct grid *gd, u_int py)
{
if ((py) >= (gd)->hsize + (gd)->sy)
log_fatalx("y out of range: %u", py);
return (0);
}
#else
int
grid_check_x(struct grid *gd, u_int px)
{
if ((px) >= (gd)->sx) {
log_debug("x out of range: %u", px);
return (-1);
}
return (0);
}
int
grid_check_y(struct grid *gd, u_int py)
{
if ((py) >= (gd)->hsize + (gd)->sy) {
log_debug("y out of range: %u", py);
return (-1);
}
return (0);
}
#endif
/* 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;
gd->flags = GRID_HISTORY;
gd->hsize = 0;
gd->hlimit = hlimit;
gd->size = xcalloc(gd->sy, sizeof *gd->size);
gd->data = xcalloc(gd->sy, sizeof *gd->data);
gd->usize = xcalloc(gd->sy, sizeof *gd->usize);
gd->udata = xcalloc(gd->sy, sizeof *gd->udata);
return (gd);
}
/* Destroy grid. */
void
grid_destroy(struct grid *gd)
{
u_int yy;
for (yy = 0; yy < gd->hsize + gd->sy; yy++) {
if (gd->udata[yy] != NULL)
xfree(gd->udata[yy]);
if (gd->data[yy] != NULL)
xfree(gd->data[yy]);
}
if (gd->udata != NULL)
xfree(gd->udata);
if (gd->usize != NULL)
xfree(gd->usize);
if (gd->data != NULL)
xfree(gd->data);
if (gd->size != NULL)
xfree(gd->size);
xfree(gd);
}
/* Compare grids. */
int
grid_compare(struct grid *ga, struct grid *gb)
{
struct grid_cell *gca, *gcb;
struct grid_utf8 *gua, *gub;
u_int xx, yy;
if (ga->sx != gb->sx || ga->sy != ga->sy)
return (1);
for (yy = 0; yy < ga->sy; yy++) {
if (ga->size[yy] != gb->size[yy])
return (1);
for (xx = 0; xx < ga->sx; xx++) {
gca = &ga->data[yy][xx];
gcb = &gb->data[yy][xx];
if (memcmp(gca, gcb, sizeof (struct grid_cell)) != 0)
return (1);
if (!(gca->flags & GRID_FLAG_UTF8))
continue;
gua = &ga->udata[yy][xx];
gub = &gb->udata[yy][xx];
if (memcmp(gua, gub, sizeof (struct grid_utf8)) != 0)
return (1);
}
}
return (0);
}
/* Scroll a line into the history. */
void
grid_scroll_line(struct grid *gd)
{
u_int yy;
GRID_DEBUG(gd, "");
if (gd->hsize >= gd->hlimit) {
/* If the limit is hit, free the bottom 10% and shift up. */
yy = gd->hlimit / 10;
if (yy < 1)
yy = 1;
grid_move_lines(gd, 0, yy, gd->hsize + gd->sy - yy);
gd->hsize -= yy;
}
yy = gd->hsize + gd->sy;
gd->size = xrealloc(gd->size, yy + 1, sizeof *gd->size);
gd->size[yy] = 0;
gd->data = xrealloc(gd->data, yy + 1, sizeof *gd->data);
gd->data[yy] = NULL;
gd->usize = xrealloc(gd->usize, yy + 1, sizeof *gd->usize);
gd->usize[yy] = 0;
gd->udata = xrealloc(gd->udata, yy + 1, sizeof *gd->udata);
gd->udata[yy] = NULL;
gd->hsize++;
}
/* Reduce line to fit to cell. */
void
grid_reduce_line(struct grid *gd, u_int py, u_int sx)
{
if (sx < gd->size[py]) {
gd->data[py] = xrealloc(gd->data[py], sx, sizeof **gd->data);
gd->size[py] = sx;
}
if (sx < gd->usize[py]) {
gd->udata[py] = xrealloc(gd->udata[py], sx, sizeof **gd->udata);
gd->usize[py] = sx;
}
}
/* Expand line to fit to cell. */
void
grid_expand_line(struct grid *gd, u_int py, u_int sx)
{
u_int xx;
if (sx <= gd->size[py])
return;
gd->data[py] = xrealloc(gd->data[py], sx, sizeof **gd->data);
for (xx = gd->size[py]; xx < sx; xx++)
grid_put_cell(gd, xx, py, &grid_default_cell);
gd->size[py] = sx;
}
/* Expand line to fit to cell for UTF-8. */
void
grid_expand_line_utf8(struct grid *gd, u_int py, u_int sx)
{
if (sx <= gd->usize[py])
return;
gd->udata[py] = xrealloc(gd->udata[py], sx, sizeof **gd->udata);
gd->usize[py] = sx;
}
/* Get cell for reading. */
const struct grid_cell *
grid_peek_cell(struct grid *gd, u_int px, u_int py)
{
if (grid_check_x(gd, px) != 0)
return (&grid_default_cell);
if (grid_check_y(gd, py) != 0)
return (&grid_default_cell);
if (px >= gd->size[py])
return (&grid_default_cell);
return (&gd->data[py][px]);
}
/* Get cell at relative position (for writing). */
struct grid_cell *
grid_get_cell(struct grid *gd, u_int px, u_int py)
{
if (grid_check_x(gd, px) != 0)
return (NULL);
if (grid_check_y(gd, py) != 0)
return (NULL);
grid_expand_line(gd, py, px + 1);
return (&gd->data[py][px]);
}
/* Set cell at relative position. */
void
grid_set_cell(
struct grid *gd, u_int px, u_int py, const struct grid_cell *gc)
{
if (grid_check_x(gd, px) != 0)
return;
if (grid_check_y(gd, py) != 0)
return;
grid_expand_line(gd, py, px + 1);
grid_put_cell(gd, px, py, gc);
}
/* Get UTF-8 for reading. */
const struct grid_utf8 *
grid_peek_utf8(struct grid *gd, u_int px, u_int py)
{
if (grid_check_x(gd, px) != 0)
return (NULL);
if (grid_check_y(gd, py) != 0)
return (NULL);
if (px >= gd->usize[py])
return (NULL);
return (&gd->udata[py][px]);
}
/* Get utf8 at relative position (for writing). */
struct grid_utf8 *
grid_get_utf8(struct grid *gd, u_int px, u_int py)
{
if (grid_check_x(gd, px) != 0)
return (NULL);
if (grid_check_y(gd, py) != 0)
return (NULL);
grid_expand_line_utf8(gd, py, px + 1);
return (&gd->udata[py][px]);
}
/* Set utf8 at relative position. */
void
grid_set_utf8(
struct grid *gd, u_int px, u_int py, const struct grid_utf8 *gc)
{
if (grid_check_x(gd, px) != 0)
return;
if (grid_check_y(gd, py) != 0)
return;
grid_expand_line_utf8(gd, py, px + 1);
grid_put_utf8(gd, px, py, gc);
}
/*
* Clear area. Note this is different from a fill as it just omits unallocated
* cells.
*/
void
grid_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny)
{
u_int xx, yy;
GRID_DEBUG(gd, "px=%u, py=%u, nx=%u, ny=%u", px, py, nx, ny);
if (nx == 0 || ny == 0)
return;
if (px == 0 && nx == gd->sx) {
grid_clear_lines(gd, py, ny);
return;
}
if (grid_check_x(gd, px) != 0)
return;
if (grid_check_x(gd, px + nx - 1) != 0)
return;
if (grid_check_y(gd, py) != 0)
return;
if (grid_check_y(gd, py + ny - 1) != 0)
return;
for (yy = py; yy < py + ny; yy++) {
for (xx = px; xx < px + nx; xx++) {
if (xx >= gd->size[yy])
break;
grid_put_cell(gd, xx, yy, &grid_default_cell);
}
}
}
/* Clear lines. This just frees and truncates the lines. */
void
grid_clear_lines(struct grid *gd, u_int py, u_int ny)
{
u_int yy;
GRID_DEBUG(gd, "py=%u, ny=%u", py, ny);
if (ny == 0)
return;
if (grid_check_y(gd, py) != 0)
return;
if (grid_check_y(gd, py + ny - 1) != 0)
return;
for (yy = py; yy < py + ny; yy++) {
if (gd->data[yy] != NULL) {
xfree(gd->data[yy]);
gd->data[yy] = NULL;
gd->size[yy] = 0;
}
if (gd->udata[yy] != NULL) {
xfree(gd->udata[yy]);
gd->udata[yy] = NULL;
gd->usize[yy] = 0;
}
}
}
/* Move a group of lines. */
void
grid_move_lines(struct grid *gd, u_int dy, u_int py, u_int ny)
{
u_int yy;
GRID_DEBUG(gd, "dy=%u, py=%u, ny=%u", dy, py, ny);
if (ny == 0 || py == dy)
return;
if (grid_check_y(gd, py) != 0)
return;
if (grid_check_y(gd, py + ny - 1) != 0)
return;
if (grid_check_y(gd, dy) != 0)
return;
if (grid_check_y(gd, 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_clear_lines(gd, yy, 1);
}
memmove(&gd->data[dy], &gd->data[py], ny * (sizeof *gd->data));
memmove(&gd->size[dy], &gd->size[py], ny * (sizeof *gd->size));
memmove(&gd->udata[dy], &gd->udata[py], ny * (sizeof *gd->udata));
memmove(&gd->usize[dy], &gd->usize[py], ny * (sizeof *gd->usize));
/* Wipe any lines that have been moved (without freeing them). */
for (yy = py; yy < py + ny; yy++) {
if (yy >= dy && yy < dy + ny)
continue;
gd->data[yy] = NULL;
gd->size[yy] = 0;
gd->udata[yy] = NULL;
gd->usize[yy] = 0;
}
}
/* 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 xx;
GRID_DEBUG(gd, "dx=%u, px=%u, py=%u, nx=%u", dx, px, py, nx);
if (nx == 0 || px == dx)
return;
if (grid_check_x(gd, px) != 0)
return;
if (grid_check_x(gd, px + nx - 1) != 0)
return;
if (grid_check_x(gd, dx + nx - 1) != 0)
return;
if (grid_check_y(gd, py) != 0)
return;
grid_expand_line(gd, py, px + nx);
grid_expand_line(gd, py, dx + nx);
memmove(&gd->data[py][dx], &gd->data[py][px], nx * (sizeof **gd->data));
if (gd->udata[py] != NULL) {
grid_expand_line_utf8(gd, py, px + nx);
grid_expand_line_utf8(gd, py, dx + nx);
memmove(&gd->udata[py][dx],
&gd->udata[py][px], nx * (sizeof **gd->udata));
}
/* Wipe any cells that have been moved. */
for (xx = px; xx < px + nx; xx++) {
if (xx >= dx && xx < dx + nx)
continue;
grid_put_cell(gd, xx, py, &grid_default_cell);
}
}
/* Convert cells into a string. */
char *
grid_string_cells(struct grid *gd, u_int px, u_int py, u_int nx)
{
const struct grid_cell *gc;
const struct grid_utf8 *gu;
char *buf;
size_t len, off;
u_int xx, i;
GRID_DEBUG(gd, "px=%u, py=%u, nx=%u", px, py, nx);
len = 128;
buf = xmalloc(len);
off = 0;
for (xx = px; xx < px + nx; xx++) {
gc = grid_peek_cell(gd, xx, py);
if (gc->flags & GRID_FLAG_PADDING)
continue;
if (gc->flags & GRID_FLAG_UTF8) {
while (len < off + UTF8_SIZE + 1) {
buf = xrealloc(buf, 2, len);
len *= 2;
}
gu = grid_peek_utf8(gd, xx, py);
for (i = 0; i < UTF8_SIZE; i++) {
if (gu->data[i] == 0xff)
break;
buf[off++] = gu->data[i];
}
} else {
while (len < off + 2) {
buf = xrealloc(buf, 2, len);
len *= 2;
}
buf[off++] = gc->data;
}
}
while (off > 0 && buf[off - 1] == ' ')
off--;
buf[off] = '\0';
return (buf);
}
/*
* Duplicate a set of lines between two grids. If there aren't enough lines in
* either source or destination, the number of lines is limited to the number
* available.
*/
void
grid_duplicate_lines(
struct grid *dst, u_int dy, struct grid *src, u_int sy, u_int ny)
{
u_int yy;
GRID_DEBUG(src, "dy=%u, sy=%u, ny=%u", dy, sy, ny);
if (dy + ny > dst->hsize + dst->sy)
ny = dst->hsize + dst->sy - dy;
if (sy + ny > src->hsize + src->sy)
ny = src->hsize + src->sy - sy;
grid_clear_lines(dst, dy, ny);
for (yy = 0; yy < ny; yy++) {
dst->size[dy] = src->size[sy];
if (src->size[sy] == 0)
dst->data[dy] = NULL;
else {
dst->data[dy] = xcalloc(
src->size[sy], sizeof **dst->data);
memcpy(dst->data[dy], src->data[sy],
src->size[sy] * (sizeof **dst->data));
}
dst->usize[dy] = src->usize[sy];
if (src->usize[sy] == 0)
dst->udata[dy] = NULL;
else {
dst->udata[dy] = xcalloc(
src->usize[sy], sizeof **dst->udata);
memcpy(dst->udata[dy], src->udata[sy],
src->usize[sy] * (sizeof **dst->udata));
}
sy++; dy++;
}
}
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