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[965edf]: grid.c Maximize Restore History

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grid.c    819 lines (692 with data), 18.7 kB

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/* $Id$ */
/*
* 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 <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, 0, 8, 8, (1 << 4) | 1, " " };
const struct grid_cell grid_marker_cell = { 0, 0, 8, 8, (1 << 4) | 1, "_" };
#define grid_put_cell(gd, px, py, gc) do { \
memcpy(&gd->linedata[py].celldata[px], \
gc, sizeof gd->linedata[py].celldata[px]); \
} while (0)
#define grid_put_utf8(gd, px, py, gc) do { \
memcpy(&gd->linedata[py].utf8data[px], \
gc, sizeof gd->linedata[py].utf8data[px]); \
} while (0)
int grid_check_y(struct grid *, u_int);
#ifdef DEBUG
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_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
void grid_reflow_join(struct grid *, u_int *, struct grid_line *, u_int);
void grid_reflow_split(struct grid *, u_int *, struct grid_line *, u_int,
u_int);
void grid_reflow_move(struct grid *, u_int *, struct grid_line *);
size_t grid_string_cells_fg(const struct grid_cell *, int *);
size_t grid_string_cells_bg(const struct grid_cell *, int *);
void grid_string_cells_code(const struct grid_cell *,
const struct grid_cell *, char *, size_t, int);
/* 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->linedata = xcalloc(gd->sy, sizeof *gd->linedata);
return (gd);
}
/* Destroy grid. */
void
grid_destroy(struct grid *gd)
{
struct grid_line *gl;
u_int yy;
for (yy = 0; yy < gd->hsize + gd->sy; yy++) {
gl = &gd->linedata[yy];
free(gl->celldata);
}
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 != ga->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 < ga->sx; xx++) {
gca = &gla->celldata[xx];
gcb = &glb->celldata[xx];
if (memcmp(gca, gcb, sizeof (struct grid_cell)) != 0)
return (1);
}
}
return (0);
}
/*
* 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 yy;
GRID_DEBUG(gd, "");
if (gd->hsize < gd->hlimit)
return;
yy = gd->hlimit / 10;
if (yy < 1)
yy = 1;
grid_move_lines(gd, 0, yy, gd->hsize + gd->sy - yy);
gd->hsize -= yy;
}
/*
* 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 yy;
GRID_DEBUG(gd, "");
yy = gd->hsize + gd->sy;
gd->linedata = xrealloc(gd->linedata, yy + 1, sizeof *gd->linedata);
memset(&gd->linedata[yy], 0, sizeof gd->linedata[yy]);
gd->hsize++;
}
/* 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)
{
struct grid_line *gl_history, *gl_upper, *gl_lower;
u_int yy;
GRID_DEBUG(gd, "upper=%u, lower=%u", upper, lower);
/* Create a space for a new line. */
yy = gd->hsize + gd->sy;
gd->linedata = xrealloc(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++;
gl_lower = &gd->linedata[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);
memset(gl_lower, 0, sizeof *gl_lower);
/* Move the history offset down over the line. */
gd->hsize++;
}
/* Expand line to fit to cell. */
void
grid_expand_line(struct grid *gd, u_int py, u_int sx)
{
struct grid_line *gl;
u_int xx;
gl = &gd->linedata[py];
if (sx <= gl->cellsize)
return;
gl->celldata = xrealloc(gl->celldata, sx, sizeof *gl->celldata);
for (xx = gl->cellsize; xx < sx; xx++)
grid_put_cell(gd, xx, py, &grid_default_cell);
gl->cellsize = sx;
}
/* Peek at grid line. */
const struct grid_line *
grid_peek_line(struct grid *gd, u_int py)
{
if (grid_check_y(gd, py) != 0)
return (NULL);
return (&gd->linedata[py]);
}
/* Get cell for reading. */
const struct grid_cell *
grid_peek_cell(struct grid *gd, u_int px, u_int py)
{
if (grid_check_y(gd, py) != 0)
return (&grid_default_cell);
if (px >= gd->linedata[py].cellsize)
return (&grid_default_cell);
return (&gd->linedata[py].celldata[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_y(gd, py) != 0)
return (NULL);
grid_expand_line(gd, py, px + 1);
return (&gd->linedata[py].celldata[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_y(gd, py) != 0)
return;
grid_expand_line(gd, py, px + 1);
grid_put_cell(gd, px, py, gc);
}
/* Clear area. */
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_y(gd, py) != 0)
return;
if (grid_check_y(gd, py + ny - 1) != 0)
return;
for (yy = py; yy < py + ny; yy++) {
if (px >= gd->linedata[yy].cellsize)
continue;
if (px + nx >= gd->linedata[yy].cellsize) {
gd->linedata[yy].cellsize = px;
continue;
}
for (xx = px; xx < px + nx; xx++) {
if (xx >= gd->linedata[yy].cellsize)
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)
{
struct grid_line *gl;
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++) {
gl = &gd->linedata[yy];
free(gl->celldata);
memset(gl, 0, sizeof *gl);
}
}
/* 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->linedata[dy], &gd->linedata[py], ny * (sizeof *gd->linedata));
/* Wipe any lines that have been moved (without freeing them). */
for (yy = py; yy < py + ny; yy++) {
if (yy >= dy && yy < dy + ny)
continue;
memset(&gd->linedata[yy], 0, sizeof gd->linedata[yy]);
}
}
/* Move a group of cells. */
void
grid_move_cells(struct grid *gd, u_int dx, u_int px, u_int py, u_int nx)
{
struct grid_line *gl;
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_y(gd, py) != 0)
return;
gl = &gd->linedata[py];
grid_expand_line(gd, py, px + nx);
grid_expand_line(gd, py, dx + nx);
memmove(
&gl->celldata[dx], &gl->celldata[px], nx * sizeof *gl->celldata);
/* 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);
}
}
/* Get ANSI foreground sequence. */
size_t
grid_string_cells_fg(const struct grid_cell *gc, int *values)
{
size_t n;
n = 0;
if (gc->flags & GRID_FLAG_FG256) {
values[n++] = 38;
values[n++] = 5;
values[n++] = gc->fg;
} 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. */
size_t
grid_string_cells_bg(const struct grid_cell *gc, int *values)
{
size_t n;
n = 0;
if (gc->flags & GRID_FLAG_BG256) {
values[n++] = 48;
values[n++] = 5;
values[n++] = gc->bg;
} 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 100:
case 101:
case 102:
case 103:
case 104:
case 105:
case 106:
case 107:
values[n++] = gc->bg - 10;
break;
}
}
return (n);
}
/*
* Returns ANSI code to set particular attributes (colour, bold and so on)
* given a current state. The output buffer must be able to hold at least 57
* bytes.
*/
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[16], newc[16], s[32];
size_t noldc, nnewc, n, i;
u_int attr = gc->attr;
u_int 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 }
};
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;
}
/* If the foreground c changed, append 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) {
for (i = 0; i < nnewc; i++)
s[n++] = newc[i];
}
/* If the background c 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) {
for (i = 0; i < nnewc; i++)
s[n++] = newc[i];
}
/* If there are any parameters, append an SGR code. */
*buf = '\0';
if (n > 0) {
if (escape_c0)
strlcat(buf, "\\033[", len);
else
strlcat(buf, "\033[", len);
for (i = 0; i < n; i++) {
if (i + 1 < n)
xsnprintf(tmp, sizeof tmp, "%d;", s[i]);
else
xsnprintf(tmp, sizeof tmp, "%d", s[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)
{
const struct grid_cell *gc;
static struct grid_cell lastgc1;
struct utf8_data ud;
const char* data;
char *buf, code[128];
size_t len, off, size, codelen;
u_int xx;
GRID_DEBUG(gd, "px=%u, py=%u, nx=%u", px, py, nx);
if (lastgc != NULL && *lastgc == NULL) {
memcpy(&lastgc1, &grid_default_cell, sizeof lastgc1);
*lastgc = &lastgc1;
}
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;
grid_cell_get(gc, &ud);
if (with_codes) {
grid_string_cells_code(*lastgc, gc, code, sizeof code,
escape_c0);
codelen = strlen(code);
memcpy(*lastgc, gc, sizeof *gc);
} else
codelen = 0;
data = ud.data;
size = ud.size;
if (escape_c0 && size == 1 && *data == '\\') {
data = "\\\\";
size = 2;
}
while (len < off + size + codelen + 1) {
buf = xrealloc(buf, 2, len);
len *= 2;
}
if (codelen != 0) {
memcpy(buf + off, code, codelen);
off += codelen;
}
memcpy(buf + off, data, size);
off += size;
}
if (trim) {
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)
{
struct grid_line *dstl, *srcl;
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++) {
srcl = &src->linedata[sy];
dstl = &dst->linedata[dy];
memcpy(dstl, srcl, sizeof *dstl);
if (srcl->cellsize != 0) {
dstl->celldata = xcalloc(
srcl->cellsize, sizeof *dstl->celldata);
memcpy(dstl->celldata, srcl->celldata,
srcl->cellsize * sizeof *dstl->celldata);
}
sy++;
dy++;
}
}
/* Join line data. */
void
grid_reflow_join(struct grid *dst, u_int *py, struct grid_line *src_gl,
u_int new_x)
{
struct grid_line *dst_gl = &dst->linedata[(*py) - 1];
u_int left, to_copy, ox, nx;
/* How much is left on the old line? */
left = new_x - dst_gl->cellsize;
/* Work out how much to append. */
to_copy = src_gl->cellsize;
if (to_copy > left)
to_copy = left;
ox = dst_gl->cellsize;
nx = ox + to_copy;
/* Resize the destination line. */
dst_gl->celldata = xrealloc(dst_gl->celldata, nx,
sizeof *dst_gl->celldata);
dst_gl->cellsize = nx;
/* Append as much as possible. */
memcpy(&dst_gl->celldata[ox], &src_gl->celldata[0],
to_copy * sizeof src_gl->celldata[0]);
/* If there is any left in the source, split it. */
if (src_gl->cellsize > to_copy) {
dst_gl->flags |= GRID_LINE_WRAPPED;
src_gl->cellsize -= to_copy;
grid_reflow_split(dst, py, src_gl, new_x, to_copy);
}
}
/* Split line data. */
void
grid_reflow_split(struct grid *dst, u_int *py, struct grid_line *src_gl,
u_int new_x, u_int offset)
{
struct grid_line *dst_gl = NULL;
u_int to_copy;
/* Loop and copy sections of the source line. */
while (src_gl->cellsize > 0) {
/* Create new line. */
if (*py >= dst->hsize + dst->sy)
grid_scroll_history(dst);
dst_gl = &dst->linedata[*py];
(*py)++;
/* How much should we copy? */
to_copy = new_x;
if (to_copy > src_gl->cellsize)
to_copy = src_gl->cellsize;
/* Expand destination line. */
dst_gl->celldata = xmalloc(to_copy * sizeof *dst_gl->celldata);
dst_gl->cellsize = to_copy;
dst_gl->flags |= GRID_LINE_WRAPPED;
/* Copy the data. */
memcpy (&dst_gl->celldata[0], &src_gl->celldata[offset],
to_copy * sizeof dst_gl->celldata[0]);
/* Move offset and reduce old line size. */
offset += to_copy;
src_gl->cellsize -= to_copy;
}
/* Last line is not wrapped. */
if (dst_gl != NULL)
dst_gl->flags &= ~GRID_LINE_WRAPPED;
}
/* Move line data. */
void
grid_reflow_move(struct grid *dst, u_int *py, struct grid_line *src_gl)
{
struct grid_line *dst_gl;
/* Create new line. */
if (*py >= dst->hsize + dst->sy)
grid_scroll_history(dst);
dst_gl = &dst->linedata[*py];
(*py)++;
/* Copy the old line. */
memcpy(dst_gl, src_gl, sizeof *dst_gl);
dst_gl->flags &= ~GRID_LINE_WRAPPED;
/* Clear old line. */
src_gl->celldata = NULL;
}
/*
* Reflow lines from src grid into dst grid of width new_x. Returns number of
* lines fewer in the visible area. The source grid is destroyed.
*/
u_int
grid_reflow(struct grid *dst, struct grid *src, u_int new_x)
{
u_int py, sy, line;
int previous_wrapped;
struct grid_line *src_gl;
py = 0;
sy = src->sy;
previous_wrapped = 0;
for (line = 0; line < sy + src->hsize; line++) {
src_gl = src->linedata + line;
if (!previous_wrapped) {
/* Wasn't wrapped. If smaller, move to destination. */
if (src_gl->cellsize <= new_x)
grid_reflow_move(dst, &py, src_gl);
else
grid_reflow_split(dst, &py, src_gl, new_x, 0);
} else {
/* Previous was wrapped. Try to join. */
grid_reflow_join(dst, &py, src_gl, new_x);
}
previous_wrapped = src_gl->flags & GRID_LINE_WRAPPED;
}
grid_destroy(src);
if (py > sy)
return (0);
return (sy - py);
}