mainnika
/
weston
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

terminal: Scroll margins

Browse Source 
Implement scroll margins and related escape codes.

Signed-off-by: Callum Lowcay <callum@callumscode.com>
dev
Callum Lowcay 14 years ago committed by Kristian Høgsberg
parent b8609ada50
commit bbeac60b8a
1 changed files with 190 additions and 16 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 206
      clients/terminal.c

206
clients/terminal.c
Unescape View File

@ -187,7 +187,9 @@ struct terminal {
union utf8_char *data;
struct attr *data_attr;
struct attr curr_attr;
char origin_mode;
union utf8_char last_char;
int margin_top, margin_bottom;
int data_pitch, attr_pitch; /* The width in bytes of a line */
int width, height, start, row, column;
int fd, master;
@ -211,6 +213,7 @@ static void
terminal_init(struct terminal *terminal)
{
terminal->curr_attr = terminal->color_scheme->default_attr;
terminal->origin_mode = 0;
terminal->row = 0;
terminal->column = 0;
@ -265,6 +268,94 @@ terminal_get_attr(struct terminal *terminal, int row, int col) {
return terminal_get_attr_row(terminal, row)[col];
}
static void
terminal_scroll_buffer(struct terminal *terminal, int d)
{
int i;
d = d % (terminal->height + 1);
terminal->start = (terminal->start + d) % terminal->height;
if (terminal->start < 0) terminal->start = terminal->height + terminal->start;
if(d < 0) {
d = 0 - d;
for(i = 0; i < d; i++) {
memset(terminal_get_row(terminal, i), 0, terminal->data_pitch);
attr_init(terminal_get_attr_row(terminal, i),
terminal->curr_attr, terminal->width);
}
} else {
for(i = terminal->height - d; i < terminal->height; i++) {
memset(terminal_get_row(terminal, i), 0, terminal->data_pitch);
attr_init(terminal_get_attr_row(terminal, i),
terminal->curr_attr, terminal->width);
}
}
}
static void
terminal_scroll_window(struct terminal *terminal, int d)
{
int i;
int window_height;
int from_row, to_row;
struct attr *dup_attr;
// scrolling range is inclusive
window_height = terminal->margin_bottom - terminal->margin_top + 1;
d = d % (window_height + 1);
if(d < 0) {
d = 0 - d;
to_row = terminal->margin_bottom;
from_row = terminal->margin_bottom - d;
for (i = 0; i < (window_height - d); i++) {
memcpy(terminal_get_row(terminal, to_row - i),
terminal_get_row(terminal, from_row - i),
terminal->data_pitch);
memcpy(terminal_get_attr_row(terminal, to_row - i),
terminal_get_attr_row(terminal, from_row - i),
terminal->attr_pitch);
}
dup_attr = terminal_get_attr_row(terminal, terminal->margin_top);
for (i = terminal->margin_top; i < (terminal->margin_top + d); i++) {
memset(terminal_get_row(terminal, i), 0, terminal->data_pitch);
if (i > terminal->margin_top) {
memcpy(terminal_get_attr_row(terminal, i),
dup_attr, terminal->attr_pitch);
}
}
} else {
to_row = terminal->margin_top;
from_row = terminal->margin_top + d;
for (i = 0; i < (window_height - d); i++) {
memcpy(terminal_get_row(terminal, to_row + i),
terminal_get_row(terminal, from_row + i),
terminal->data_pitch);
memcpy(terminal_get_attr_row(terminal, to_row + i),
terminal_get_attr_row(terminal, from_row + i),
terminal->attr_pitch);
}
dup_attr = terminal_get_attr_row(terminal, terminal->margin_bottom);
for (i = terminal->margin_bottom - d + 1; i <= terminal->margin_bottom; i++) {
memset(terminal_get_row(terminal, i), 0, terminal->data_pitch);
if (i < terminal->margin_bottom) {
memcpy(terminal_get_attr_row(terminal, i),
dup_attr, terminal->attr_pitch);
}
}
}
}
static void
terminal_scroll(struct terminal *terminal, int d)
{
if(terminal->margin_top == 0 && terminal->margin_bottom == terminal->height - 1)
terminal_scroll_buffer(terminal, d);
else
terminal_scroll_window(terminal, d);
}
static void
terminal_resize(struct terminal *terminal, int width, int height)
{
@ -317,6 +408,8 @@ terminal_resize(struct terminal *terminal, int width, int height)
terminal->attr_pitch = attr_pitch;
terminal->width = width;
terminal->height = height;
if(terminal->margin_bottom >= terminal->height)
terminal->margin_bottom = terminal->height - 1;
terminal->data = data;
terminal->data_attr = data_attr;
@ -530,13 +623,39 @@ handle_char(struct terminal *terminal, union utf8_char utf8);
static void
handle_sgr(struct terminal *terminal, int code);
static void
handle_term_parameter(struct terminal *terminal, int code, int sr)
{
if (terminal->qmark_flag) {
switch(code) {
case 6: /* DECOM */
terminal->origin_mode = sr;
if (terminal->origin_mode)
terminal->row = terminal->margin_top;
else
terminal->row = 0;
terminal->column = 0;
break;
default:
fprintf(stderr, "Unknown parameter: ?%d\n", code);
break;
}
} else {
switch(code) {
default:
fprintf(stderr, "Unknown parameter: %d\n", code);
break;
}
}
}
static void
handle_escape(struct terminal *terminal)
{
union utf8_char *row;
struct attr *attr_row;
char *p;
int i, count;
int i, count, top, bottom;
int args[10], set[10] = { 0, };
terminal->escape[terminal->escape_length++] = '\0';
@ -610,6 +729,22 @@ handle_escape(struct terminal *terminal)
memset(&row[terminal->column], 0, (terminal->width - terminal->column) * sizeof(union utf8_char));
attr_init(&attr_row[terminal->column], terminal->curr_attr, (terminal->width - terminal->column));
break;
case 'S': /* SU */
terminal_scroll(terminal, set[0] ? args[0] : 1);
break;
case 'T': /* SD */
terminal_scroll(terminal, 0 - (set[0] ? args[0] : 1));
break;
case 'h': /* SM */
for(i = 0; i < 10 && set[i]; i++) {
handle_term_parameter(terminal, args[i], 1);
}
break;
case 'l': /* RM */
for(i = 0; i < 10 && set[i]; i++) {
handle_term_parameter(terminal, args[i], 0);
}
break;
case 'm': /* SGR */
if (set[0] && set[1] && set[2] && args[1] == 5) {
if (args[0] == 38) {
@ -631,11 +766,31 @@ handle_escape(struct terminal *terminal)
}
}
break;
case '?':
if (strcmp(p, "?25l") == 0) {
/* hide cursor */
} else if (strcmp(p, "?25h") == 0) {
/* show cursor */
case 'r':
if(!set[0]) {
terminal->margin_top = 0;
terminal->margin_bottom = terminal->height-1;
terminal->row = 0;
terminal->column = 0;
} else {
top = (set[0] ? args[0] : 1) - 1;
top = top < 0 ? 0 :
(top >= terminal->height ? terminal->height - 1 : top);
bottom = (set[1] ? args[1] : 1) - 1;
bottom = bottom < 0 ? 0 :
(bottom >= terminal->height ? terminal->height - 1 : bottom);
if(bottom > top) {
terminal->margin_top = top;
terminal->margin_bottom = bottom;
} else {
terminal->margin_top = 0;
terminal->margin_bottom = terminal->height-1;
}
if(terminal->origin_mode)
terminal->row = terminal->margin_top;
else
terminal->row = 0;
terminal->column = 0;
}
break;
default:
@ -647,6 +802,28 @@ handle_escape(struct terminal *terminal)
static void
handle_non_csi_escape(struct terminal *terminal, char code)
{
switch(code) {
case 'M': /* RI */
terminal->row -= 1;
if(terminal->row < terminal->margin_top) {
terminal->row = terminal->margin_top;
terminal_scroll(terminal, -1);
}
break;
case 'E': /* NEL */
terminal->column = 0;
// fallthrough
case 'D': /* IND */
terminal->row += 1;
if(terminal->row > terminal->margin_bottom) {
terminal->row = terminal->margin_bottom;
terminal_scroll(terminal, +1);
}
break;
default:
fprintf(stderr, "Unknown escape code: %c\n", code);
break;
}
}
static void
@ -735,16 +912,10 @@ handle_special_char(struct terminal *terminal, char c)
/* fallthrough */
case '\v':
case '\f':
if (terminal->row + 1 < terminal->height) {
terminal->row++;
} else {
terminal->start++;
if (terminal->start == terminal->height)
terminal->start = 0;
memset(terminal_get_row(terminal, terminal->row),
0, terminal->width * sizeof(union utf8_char));
attr_init(terminal_get_attr_row(terminal, terminal->row),
terminal->curr_attr, terminal->width);
terminal->row++;
if(terminal->row > terminal->margin_bottom) {
terminal->row = terminal->margin_bottom;
terminal_scroll(terminal, +1);
}
break;
@ -969,6 +1140,9 @@ terminal_create(struct display *display, int fullscreen)
terminal->fullscreen = fullscreen;
terminal->color_scheme = &DEFAULT_COLORS;
terminal_init(terminal);
terminal->margin_top = 0;
terminal->margin_bottom = 10000; /* much too large, will be trimmed down
* by terminal_resize */
terminal->window = window_create(display, "Wayland Terminal",
500, 400);

Write Preview
Loading…
Cancel
Save