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/* $Id: window-copy.c,v 1.17 2008-06-04 18:50:35 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"
struct screen *window_copy_init(struct window *);
void window_copy_free(struct window *);
void window_copy_resize(struct window *, u_int, u_int);
void window_copy_key(struct window *, int);
void window_copy_redraw_lines(struct window *, u_int, u_int);
void window_copy_redraw_screen(struct window *);
void window_copy_write_line(
struct window *, struct screen_write_ctx *, u_int);
void window_copy_write_lines(
struct window *, struct screen_write_ctx *, u_int, u_int);
void window_copy_write_column(
struct window *, struct screen_write_ctx *, u_int);
void window_copy_write_columns(
struct window *, struct screen_write_ctx *, u_int, u_int);
void window_copy_update_cursor(struct window *);
void window_copy_start_selection(struct window *);
int window_copy_update_selection(struct window *);
void window_copy_copy_selection(struct window *);
void window_copy_copy_line(
struct window *, char **, size_t *, size_t *, u_int, u_int, u_int);
u_int window_copy_find_length(struct window *, u_int);
void window_copy_cursor_start_of_line(struct window *);
void window_copy_cursor_end_of_line(struct window *);
void window_copy_cursor_left(struct window *);
void window_copy_cursor_right(struct window *);
void window_copy_cursor_up(struct window *);
void window_copy_cursor_down(struct window *);
void window_copy_scroll_left(struct window *, u_int);
void window_copy_scroll_right(struct window *, u_int);
void window_copy_scroll_up(struct window *, u_int);
void window_copy_scroll_down(struct window *, u_int);
const struct window_mode window_copy_mode = {
window_copy_init,
window_copy_free,
window_copy_resize,
window_copy_key
};
struct window_copy_mode_data {
struct screen screen;
u_int ox;
u_int oy;
u_int selx;
u_int sely;
u_int cx;
u_int cy;
};
struct screen *
window_copy_init(struct window *w)
{
struct window_copy_mode_data *data;
struct screen *s;
struct screen_write_ctx ctx;
u_int i;
w->modedata = data = xmalloc(sizeof *data);
data->ox = 0;
data->oy = 0;
data->cx = w->base.cx;
data->cy = w->base.cy;
s = &data->screen;
screen_create(s, screen_size_x(&w->base), screen_size_y(&w->base), 0);
s->cx = data->cx;
s->cy = data->cy;
screen_write_start(&ctx, s, NULL, NULL);
for (i = 0; i < screen_size_y(s); i++)
window_copy_write_line(w, &ctx, i);
screen_write_move_cursor(&ctx, data->cx, data->cy);
screen_write_stop(&ctx);
return (s);
}
void
window_copy_free(struct window *w)
{
struct window_copy_mode_data *data = w->modedata;
screen_destroy(&data->screen);
xfree(data);
}
void
window_copy_resize(struct window *w, u_int sx, u_int sy)
{
struct window_copy_mode_data *data = w->modedata;
struct screen *s = &data->screen;
screen_resize(s, sx, sy);
screen_display_copy_area(&data->screen, &w->base,
0, 0, screen_size_x(s), screen_size_y(s), data->ox, data->oy);
window_copy_update_selection(w);
}
void
window_copy_key(struct window *w, int key)
{
struct window_copy_mode_data *data = w->modedata;
struct screen *s = &data->screen;
switch (key) {
case 'Q':
case 'q':
window_reset_mode(w);
break;
case 'h':
case KEYC_LEFT:
window_copy_cursor_left(w);
return;
case 'l':
case KEYC_RIGHT:
window_copy_cursor_right(w);
return;
case 'k':
case 'K':
case KEYC_UP:
window_copy_cursor_up(w);
return;
case 'j':
case 'J':
case KEYC_DOWN:
window_copy_cursor_down(w);
return;
case '\025': /* C-u */
case KEYC_PPAGE:
if (data->oy + screen_size_y(s) > w->base.hsize)
data->oy = w->base.hsize;
else
data->oy += screen_size_y(s);
window_copy_update_selection(w);
window_copy_redraw_screen(w);
break;
case '\006': /* C-f */
case KEYC_NPAGE:
if (data->oy < screen_size_y(s))
data->oy = 0;
else
data->oy -= screen_size_y(s);
window_copy_update_selection(w);
window_copy_redraw_screen(w);
break;
case '\000': /* C-space */
case ' ':
window_copy_start_selection(w);
break;
case '\033':
screen_clear_selection(&data->screen);
break;
case '\027': /* C-w */
case '\r': /* enter */
window_copy_copy_selection(w);
window_reset_mode(w);
break;
case '0':
case '\001': /* C-a */
window_copy_cursor_start_of_line(w);
break;
case '$':
case '\005': /* C-e */
window_copy_cursor_end_of_line(w);
break;
}
}
void
window_copy_write_line(
struct window *w, struct screen_write_ctx *ctx, u_int py)
{
struct window_copy_mode_data *data = w->modedata;
struct screen *s = &data->screen;
size_t size;
if (py == 0) {
screen_write_set_attributes(
ctx, ATTR_BRIGHT|ATTR_REVERSE, 0x70);
screen_write_move_cursor(ctx, 0, 0);
size = screen_write_put_string_rjust(
ctx, "[%u,%u/%u]", data->ox, data->oy, w->base.hsize);
screen_write_set_attributes(
ctx, SCREEN_DEFATTR, SCREEN_DEFCOLR);
} else
size = 0;
screen_write_move_cursor(ctx, 0, py);
screen_write_copy_area(
ctx, &w->base, screen_size_x(s) - size, 1, data->ox, data->oy);
}
void
window_copy_write_lines(
struct window *w, struct screen_write_ctx *ctx, u_int py, u_int ny)
{
struct window_copy_mode_data *data = w->modedata;
struct screen *s = &data->screen;
if (py == 0) {
window_copy_write_line(w, ctx, 0);
if (ny == 1)
return;
py++;
ny--;
}
screen_write_move_cursor(ctx, 0, py);
screen_write_copy_area(
ctx, &w->base, screen_size_x(s), ny, data->ox, data->oy);
}
void
window_copy_write_column(
struct window *w, struct screen_write_ctx *ctx, u_int px)
{
struct window_copy_mode_data *data = w->modedata;
struct screen *s = &data->screen;
screen_write_move_cursor(ctx, px, 0);
screen_write_copy_area(
ctx, &w->base, 1, screen_size_y(s), data->ox, data->oy);
}
void
window_copy_write_columns(
struct window *w, struct screen_write_ctx *ctx, u_int px, u_int nx)
{
struct window_copy_mode_data *data = w->modedata;
struct screen *s = &data->screen;
screen_write_move_cursor(ctx, px, 0);
screen_write_copy_area(
ctx, &w->base, nx, screen_size_y(s), data->ox, data->oy);
}
void
window_copy_redraw_lines(struct window *w, u_int py, u_int ny)
{
struct window_copy_mode_data *data = w->modedata;
struct screen_write_ctx ctx;
u_int i;
screen_write_start_window(&ctx, w);
for (i = py; i < py + ny; i++)
window_copy_write_line(w, &ctx, i);
screen_write_move_cursor(&ctx, data->cx, data->cy);
screen_write_stop(&ctx);
}
void
window_copy_redraw_screen(struct window *w)
{
struct window_copy_mode_data *data = w->modedata;
window_copy_redraw_lines(w, 0, screen_size_x(&data->screen));
}
void
window_copy_update_cursor(struct window *w)
{
struct window_copy_mode_data *data = w->modedata;
struct screen_write_ctx ctx;
screen_write_start_window(&ctx, w);
screen_write_move_cursor(&ctx, data->cx, data->cy);
screen_write_stop(&ctx);
}
void
window_copy_start_selection(struct window *w)
{
struct window_copy_mode_data *data = w->modedata;
struct screen *s = &data->screen;
data->selx = screen_x(&w->base, data->cx) + data->ox;
data->sely = screen_y(&w->base, data->cy) - data->oy;
s->sel.flag = 1;
window_copy_update_selection(w);
}
int
window_copy_update_selection(struct window *w)
{
struct window_copy_mode_data *data = w->modedata;
struct screen *s = &data->screen;
u_int sx, sy, tx, ty;
if (!s->sel.flag)
return (0);
/* Find top-left of screen. */
tx = screen_x(&w->base, 0) + data->ox;
ty = screen_y(&w->base, 0) - data->oy;
/* Adjust the selection. */
sx = data->selx;
sy = data->sely;
if (sy < ty) {
/* Above it. */
sx = 0;
sy = 0;
} else if (sy > ty + screen_last_y(s)) {
/* Below it. */
sx = screen_last_x(s);
sy = screen_last_y(s);
} else if (sx < tx) {
/* To the left. */
sx = 0;
} else if (sx > tx + screen_last_x(s)) {
/* To the right. */
sx = 0;
sy++;
if (sy > screen_last_y(s))
sy = screen_last_y(s);
} else {
sx -= tx;
sy -= ty;
}
sx = screen_x(s, sx);
sy = screen_x(s, sy);
screen_set_selection(
s, sx, sy, screen_x(s, data->cx), screen_y(s, data->cy));
return (1);
}
void
window_copy_copy_selection(struct window *w)
{
struct window_copy_mode_data *data = w->modedata;
struct screen *s = &data->screen;
char *buf;
size_t len, off;
u_int i, xx, yy, sx, sy, ex, ey;
if (!s->sel.flag)
return;
len = BUFSIZ;
buf = xmalloc(len);
off = 0;
*buf = '\0';
/*
* The selection extends from selx,sely to (adjusted) cx,cy on
* the base screen.
*/
/* Find start and end. */
xx = screen_x(&w->base, data->cx) + data->ox;
yy = screen_y(&w->base, data->cy) - data->oy;
if (xx < data->selx || (yy == data->sely && xx < data->selx)) {
sx = xx; sy = yy;
ex = data->selx; ey = data->sely;
} else {
sx = data->selx; sy = data->sely;
ex = xx; ey = yy;
}
/* Trim ex to end of line. */
xx = window_copy_find_length(w, ey);
if (ex > xx)
ex = xx;
/* Copy the lines. */
if (sy == ey)
window_copy_copy_line(w, &buf, &off, &len, sy, sx, ex);
else {
xx = window_copy_find_length(w, sy);
window_copy_copy_line(w, &buf, &off, &len, sy, sx, xx);
if (ey - sy > 1) {
for (i = sy + 1; i < ey - 1; i++) {
xx = window_copy_find_length(w, i);
window_copy_copy_line(
w, &buf, &off, &len, i, 0, xx);
}
}
window_copy_copy_line(w, &buf, &off, &len, ey, 0, ex);
}
/* Terminate buffer, overwriting final \n. */
if (off != 0)
buf[off - 1] = '\0';
if (paste_buffer != NULL)
xfree(paste_buffer);
paste_buffer = buf;
}
void
window_copy_copy_line(struct window *w,
char **buf, size_t *off, size_t *len, u_int sy, u_int sx, u_int ex)
{
u_char i, xx;
if (sx > ex)
return;
xx = window_copy_find_length(w, sy);
if (ex > xx)
ex = xx;
if (sx > xx)
sx = xx;
if (sx < ex) {
for (i = sx; i < ex; i++) {
*buf = ensure_size(*buf, len, 1, *off + 1);
(*buf)[*off] = w->base.grid_data[sy][i];
(*off)++;
}
}
*buf = ensure_size(*buf, len, 1, *off + 1);
(*buf)[*off] = '\n';
(*off)++;
}
u_int
window_copy_find_length(struct window *w, u_int py)
{
u_int px;
px = w->base.grid_size[py];
while (px > 0 && w->base.grid_data[py][px - 1] == SCREEN_DEFDATA)
px--;
return (px);
}
void
window_copy_cursor_start_of_line(struct window *w)
{
struct window_copy_mode_data *data = w->modedata;
if (data->ox != 0)
window_copy_scroll_right(w, data->ox);
data->cx = 0;
if (window_copy_update_selection(w))
window_copy_redraw_lines(w, data->cy, 1);
else
window_copy_update_cursor(w);
}
void
window_copy_cursor_end_of_line(struct window *w)
{
struct window_copy_mode_data *data = w->modedata;
struct screen *s = &data->screen;
u_int px, py;
py = screen_y(&w->base, data->cy) - data->oy;
px = window_copy_find_length(w, py);
/* On screen. */
if (px > data->ox && px <= data->ox + screen_last_x(s))
data->cx = px - data->ox;
/* Off right of screen. */
if (px > data->ox + screen_last_x(s)) {
/* Move cursor to last and scroll screen. */
window_copy_scroll_left(w,
px - data->ox - screen_last_x(s));
data->cx = screen_last_x(s);
}
/* Off left of screen. */
if (px <= data->ox) {
if (px < screen_last_x(s)) {
/* Short enough to fit on screen. */
window_copy_scroll_right(w, data->ox);
data->cx = px;
} else {
/* Too long to fit on screen. */
window_copy_scroll_right(
w, data->ox - (px - screen_last_x(s)));
data->cx = screen_last_x(s);
}
}
if (window_copy_update_selection(w))
window_copy_redraw_lines(w, data->cy, 1);
else
window_copy_update_cursor(w);
}
void
window_copy_cursor_left(struct window *w)
{
struct window_copy_mode_data *data = w->modedata;
if (data->cx == 0) {
if (data->ox > 0)
window_copy_scroll_right(w, 1);
else {
window_copy_cursor_up(w);
window_copy_cursor_end_of_line(w);
}
} else {
data->cx--;
if (window_copy_update_selection(w))
window_copy_redraw_lines(w, data->cy, 1);
else
window_copy_update_cursor(w);
}
}
void
window_copy_cursor_right(struct window *w)
{
struct window_copy_mode_data *data = w->modedata;
u_int px, py;
py = screen_y(&w->base, data->cy) - data->oy;
px = window_copy_find_length(w, py);
if (data->cx >= px) {
window_copy_cursor_start_of_line(w);
window_copy_cursor_down(w);
} else {
data->cx++;
if (window_copy_update_selection(w))
window_copy_redraw_lines(w, data->cy, 1);
else
window_copy_update_cursor(w);
}
}
void
window_copy_cursor_up(struct window *w)
{
struct window_copy_mode_data *data = w->modedata;
u_int ox, oy, px, py;
oy = screen_y(&w->base, data->cy) - data->oy;
ox = window_copy_find_length(w, oy);
if (data->cy == 0)
window_copy_scroll_down(w, 1);
else {
data->cy--;
if (window_copy_update_selection(w))
window_copy_redraw_lines(w, data->cy, 2);
else
window_copy_update_cursor(w);
}
py = screen_y(&w->base, data->cy) - data->oy;
px = window_copy_find_length(w, py);
if (data->cx + data->ox >= px || data->cx + data->ox >= ox)
window_copy_cursor_end_of_line(w);
}
void
window_copy_cursor_down(struct window *w)
{
struct window_copy_mode_data *data = w->modedata;
struct screen *s = &data->screen;
u_int ox, oy, px, py;
oy = screen_y(&w->base, data->cy) - data->oy;
ox = window_copy_find_length(w, oy);
if (data->cy == screen_last_y(s))
window_copy_scroll_up(w, 1);
else {
data->cy++;
if (window_copy_update_selection(w))
window_copy_redraw_lines(w, data->cy - 1, 2);
else
window_copy_update_cursor(w);
}
py = screen_y(&w->base, data->cy) - data->oy;
px = window_copy_find_length(w, py);
if (data->cx + data->ox >= px || data->cx + data->ox >= ox)
window_copy_cursor_end_of_line(w);
}
void
window_copy_scroll_left(struct window *w, u_int nx)
{
struct window_copy_mode_data *data = w->modedata;
struct screen *s = &data->screen;
struct screen_write_ctx ctx;
u_int i;
if (data->ox > SHRT_MAX - nx)
nx = SHRT_MAX - data->ox;
if (nx == 0)
return;
data->ox += nx;
window_copy_update_selection(w);
screen_write_start_window(&ctx, w);
for (i = 1; i < screen_size_y(s); i++) {
screen_write_move_cursor(&ctx, 0, i);
screen_write_delete_characters(&ctx, nx);
}
window_copy_write_columns(w, &ctx, screen_size_x(s) - nx, nx);
window_copy_write_line(w, &ctx, 0);
if (s->sel.flag) {
window_copy_update_selection(w);
window_copy_write_lines(w, &ctx, data->cy, 1);
}
screen_write_move_cursor(&ctx, data->cx, data->cy);
screen_write_stop(&ctx);
}
void
window_copy_scroll_right(struct window *w, u_int nx)
{
struct window_copy_mode_data *data = w->modedata;
struct screen *s = &data->screen;
struct screen_write_ctx ctx;
u_int i;
if (data->ox < nx)
nx = data->ox;
if (nx == 0)
return;
data->ox -= nx;
window_copy_update_selection(w);
screen_write_start_window(&ctx, w);
for (i = 1; i < screen_size_y(s); i++) {
screen_write_move_cursor(&ctx, 0, i);
screen_write_insert_characters(&ctx, nx);
}
window_copy_write_columns(w, &ctx, 0, nx);
window_copy_write_line(w, &ctx, 0);
if (s->sel.flag)
window_copy_write_lines(w, &ctx, data->cy, 1);
screen_write_move_cursor(&ctx, data->cx, data->cy);
screen_write_stop(&ctx);
}
void
window_copy_scroll_up(struct window *w, u_int ny)
{
struct window_copy_mode_data *data = w->modedata;
struct screen *s = &data->screen;
struct screen_write_ctx ctx;
if (data->oy < ny)
ny = data->oy;
if (ny == 0)
return;
data->oy -= ny;
window_copy_update_selection(w);
screen_write_start_window(&ctx, w);
screen_write_move_cursor(&ctx, 0, 0);
screen_write_delete_lines(&ctx, ny);
window_copy_write_lines(w, &ctx, screen_size_y(s) - ny, ny);
window_copy_write_line(w, &ctx, 0);
if (s->sel.flag && screen_size_y(s) > ny)
window_copy_write_lines(w, &ctx, screen_size_y(s) - ny - 1, 1);
screen_write_move_cursor(&ctx, data->cx, data->cy);
screen_write_stop(&ctx);
}
void
window_copy_scroll_down(struct window *w, u_int ny)
{
struct window_copy_mode_data *data = w->modedata;
struct screen *s = &data->screen;
struct screen_write_ctx ctx;
if (ny > w->base.hsize)
return;
if (data->oy > w->base.hsize - ny)
ny = w->base.hsize - data->oy;
if (ny == 0)
return;
data->oy += ny;
window_copy_update_selection(w);
screen_write_start_window(&ctx, w);
screen_write_move_cursor(&ctx, 0, 0);
screen_write_insert_lines(&ctx, ny);
window_copy_write_lines(w, &ctx, 0, ny);
if (s->sel.flag && screen_size_y(s) > ny)
window_copy_write_lines(w, &ctx, ny, 1);
else if (ny == 1) /* nuke position */
window_copy_write_line(w, &ctx, 1);
screen_write_move_cursor(&ctx, data->cx, data->cy);
screen_write_stop(&ctx);
}