/* remove the current selection highlight, if any,
from the console holding the selection. */
void
clear_selection(void) {
highlight_pointer(-1); /* hide the pointer */
if (sel_start != -1) {
highlight(sel_start, sel_end);
sel_start = -1;
}
}
/* set the current selection. Invoked by ioctl() or by kernel code. */
int set_selection(const struct tiocl_selection *sel, struct tty_struct *tty, int user)
{
int sel_mode, new_sel_start, new_sel_end, spc;
char *bp, *obp;
int i, ps, pe;
unsigned int currcons = fg_console;
poke_blanked_console();
{ unsigned short xs, ys, xe, ye;
if (user) {
if (verify_area(VERIFY_READ, sel, sizeof(*sel)))
return -EFAULT;
__get_user(xs, &sel->xs);
__get_user(ys, &sel->ys);
__get_user(xe, &sel->xe);
__get_user(ye, &sel->ye);
__get_user(sel_mode, &sel->sel_mode);
} else {
xs = sel->xs; /* set selection from kernel */
ys = sel->ys;
xe = sel->xe;
ye = sel->ye;
sel_mode = sel->sel_mode;
}
xs--; ys--; xe--; ye--;
xs = limit(xs, video_num_columns - 1);
ys = limit(ys, video_num_lines - 1);
xe = limit(xe, video_num_columns - 1);
ye = limit(ye, video_num_lines - 1);
ps = ys * video_size_row + (xs << 1);
pe = ye * video_size_row + (xe << 1);
if (sel_mode == TIOCL_SELCLEAR) {
/* useful for screendump without selection highlights */
clear_selection();
return 0;
}
if (mouse_reporting() && (sel_mode & TIOCL_SELMOUSEREPORT)) {
mouse_report(tty, sel_mode & TIOCL_SELBUTTONMASK, xs, ys);
return 0;
}
}
if (ps > pe) /* make sel_start <= sel_end */
{
int tmp = ps;
ps = pe;
pe = tmp;
}
if (sel_cons != fg_console) {
clear_selection();
sel_cons = fg_console;
}
switch (sel_mode)
{
case TIOCL_SELCHAR: /* character-by-character selection */
new_sel_start = ps;
new_sel_end = pe;
break;
case TIOCL_SELWORD: /* word-by-word selection */
spc = isspace(sel_pos(ps));
for (new_sel_start = ps; ; ps -= 2)
{
if ((spc && !isspace(sel_pos(ps))) ||
(!spc && !inword(sel_pos(ps))))
break;
new_sel_start = ps;
if (!(ps % video_size_row))
break;
}
spc = isspace(sel_pos(pe));
for (new_sel_end = pe; ; pe += 2)
{
if ((spc && !isspace(sel_pos(pe))) ||
(!spc && !inword(sel_pos(pe))))
break;
new_sel_end = pe;
if (!((pe + 2) % video_size_row))
break;
}
break;
case TIOCL_SELLINE: /* line-by-line selection */
new_sel_start = ps - ps % video_size_row;
new_sel_end = pe + video_size_row
- pe % video_size_row - 2;
break;
case TIOCL_SELPOINTER:
highlight_pointer(pe);
return 0;
default:
return -EINVAL;
}
/* remove the pointer */
highlight_pointer(-1);
/* select to end of line if on trailing space */
if (new_sel_end > new_sel_start &&
!atedge(new_sel_end, video_size_row) &&
isspace(sel_pos(new_sel_end))) {
for (pe = new_sel_end + 2; ; pe += 2)
if (!isspace(sel_pos(pe)) ||
atedge(pe, video_size_row))
break;
if (isspace(sel_pos(pe)))
new_sel_end = pe;
}
if (sel_start == -1) /* no current selection */
highlight(new_sel_start, new_sel_end);
else if (new_sel_start == sel_start)
{
if (new_sel_end == sel_end) /* no action required */
return 0;
else if (new_sel_end > sel_end) /* extend to right */
highlight(sel_end + 2, new_sel_end);
else /* contract from right */
highlight(new_sel_end + 2, sel_end);
}
else if (new_sel_end == sel_end)
{
if (new_sel_start < sel_start) /* extend to left */
highlight(new_sel_start, sel_start - 2);
else /* contract from left */
highlight(sel_start, new_sel_start - 2);
}
else /* some other case; start selection from scratch */
{
clear_selection();
highlight(new_sel_start, new_sel_end);
}
sel_start = new_sel_start;
sel_end = new_sel_end;
/* Allocate a new buffer before freeing the old one ... */
bp = kmalloc((sel_end-sel_start)/2+1, GFP_KERNEL);
if (!bp) {
printk(KERN_WARNING "selection: kmalloc() failed\n");
clear_selection();
return -ENOMEM;
}
if (sel_buffer)
kfree(sel_buffer);
sel_buffer = bp;
obp = bp;
for (i = sel_start; i <= sel_end; i += 2) {
*bp = sel_pos(i);
if (!isspace(*bp++))
obp = bp;
if (! ((i + 2) % video_size_row)) {
/* strip trailing blanks from line and add newline,
unless non-space at end of line. */
if (obp != bp) {
bp = obp;
*bp++ = '\r';
}
obp = bp;
}
}
sel_buffer_lth = bp - sel_buffer;
return 0;
}
/* set the current selection. Invoked by ioctl() or by kernel code. */
int set_selection(const unsigned long arg, struct tty_struct *tty, int user)
{
int sel_mode, new_sel_start, new_sel_end, spc;
char *bp, *obp;
int i, ps, pe;
do_unblank_screen();
{ unsigned short *args, xs, ys, xe, ye;
args = (unsigned short *)(arg + 1);
if (user) {
int err;
err = verify_area(VERIFY_READ, args, sizeof(short) * 5);
if (err)
return err;
xs = get_user(args++) - 1;
ys = get_user(args++) - 1;
xe = get_user(args++) - 1;
ye = get_user(args++) - 1;
sel_mode = get_user(args);
} else {
xs = *(args++) - 1; /* set selection from kernel */
ys = *(args++) - 1;
xe = *(args++) - 1;
ye = *(args++) - 1;
sel_mode = *args;
}
xs = limit(xs, video_num_columns - 1);
ys = limit(ys, video_num_lines - 1);
xe = limit(xe, video_num_columns - 1);
ye = limit(ye, video_num_lines - 1);
ps = ys * video_size_row + (xs << 1);
pe = ye * video_size_row + (xe << 1);
if (sel_mode == 4) {
/* useful for screendump without selection highlights */
clear_selection();
return 0;
}
if (mouse_reporting() && (sel_mode & 16)) {
mouse_report(tty, sel_mode & 15, xs, ys);
return 0;
}
}
if (ps > pe) /* make sel_start <= sel_end */
{
int tmp = ps;
ps = pe;
pe = tmp;
}
if (sel_cons != fg_console) {
clear_selection();
sel_cons = fg_console;
}
switch (sel_mode)
{
case 0: /* character-by-character selection */
new_sel_start = ps;
new_sel_end = pe;
break;
case 1: /* word-by-word selection */
spc = isspace(sel_pos(ps));
for (new_sel_start = ps; ; ps -= 2)
{
if ((spc && !isspace(sel_pos(ps))) ||
(!spc && !inword(sel_pos(ps))))
break;
new_sel_start = ps;
if (!(ps % video_size_row))
break;
}
spc = isspace(sel_pos(pe));
for (new_sel_end = pe; ; pe += 2)
{
if ((spc && !isspace(sel_pos(pe))) ||
(!spc && !inword(sel_pos(pe))))
break;
new_sel_end = pe;
if (!((pe + 2) % video_size_row))
break;
}
break;
case 2: /* line-by-line selection */
new_sel_start = ps - ps % video_size_row;
new_sel_end = pe + video_size_row
- pe % video_size_row - 2;
break;
case 3:
highlight_pointer(pe);
return 0;
default:
return -EINVAL;
}
/* remove the pointer */
highlight_pointer(-1);
/* select to end of line if on trailing space */
if (new_sel_end > new_sel_start &&
!atedge(new_sel_end) && isspace(sel_pos(new_sel_end))) {
for (pe = new_sel_end + 2; ; pe += 2)
if (!isspace(sel_pos(pe)) || atedge(pe))
break;
if (isspace(sel_pos(pe)))
new_sel_end = pe;
}
if (sel_start == -1) /* no current selection */
highlight(new_sel_start, new_sel_end);
else if (new_sel_start == sel_start)
{
if (new_sel_end == sel_end) /* no action required */
return 0;
else if (new_sel_end > sel_end) /* extend to right */
highlight(sel_end + 2, new_sel_end);
else /* contract from right */
highlight(new_sel_end + 2, sel_end);
}
else if (new_sel_end == sel_end)
{
if (new_sel_start < sel_start) /* extend to left */
highlight(new_sel_start, sel_start - 2);
else /* contract from left */
highlight(sel_start, new_sel_start - 2);
}
else /* some other case; start selection from scratch */
{
clear_selection();
highlight(new_sel_start, new_sel_end);
}
sel_start = new_sel_start;
sel_end = new_sel_end;
if (sel_buffer)
kfree(sel_buffer);
sel_buffer = kmalloc((sel_end-sel_start)/2+1, GFP_KERNEL);
if (!sel_buffer) {
printk("selection: kmalloc() failed\n");
clear_selection();
return -ENOMEM;
}
obp = bp = sel_buffer;
for (i = sel_start; i <= sel_end; i += 2) {
*bp = sel_pos(i);
if (!isspace(*bp++))
obp = bp;
if (! ((i + 2) % video_size_row)) {
/* strip trailing blanks from line and add newline,
unless non-space at end of line. */
if (obp != bp) {
bp = obp;
*bp++ = '\r';
}
obp = bp;
}
}
sel_buffer_lth = bp - sel_buffer;
return 0;
}
