/
term.js
1478 lines (1364 loc) · 44.1 KB
/
term.js
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/*
* Javascript terminal
*
* Copyright (c) 2011-2020 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
"use strict";
function Term(options)
{
var width, height, tot_height, scrollback;
function dummy_key_handler()
{
}
width = options.cols ? options.cols : 80;
height = options.rows ? options.rows : 25;
scrollback = options.scrollback ? options.scrollback : 0;
this.font_size = options.fontSize ? options.fontSize : 15;
this.w = width;
this.h = height;
this.cur_h = height; /* current height of the scroll back buffer */
tot_height = height + scrollback;
this.tot_h = tot_height; /* maximum height of the scroll back buffer */
/* y_base and y_disp are index in the circular buffer lines of
length cur_h. They are defined modulo tot_h, i.e. they wrap
when cur_h = tot_h. If cur_h < tot_h, y_base is always equal to
cur_h - h. */
this.y_base = 0; /* position of the current top screen line in the
scroll back buffer */
this.y_disp = 0; /* position of the top displayed line in the
scroll back buffer */
/* cursor position */
this.x = 0;
this.y = 0;
this.scroll_top = 0;
this.scroll_bottom = this.h;
this.cursorstate = 0;
this.handler = dummy_key_handler;
this.state = 0;
this.output_queue = "";
this.colors = [
/* normal */
"#000000",
"#aa0000",
"#00aa00",
"#aa5500",
"#0000aa",
"#aa00aa",
"#00aaaa",
"#aaaaaa",
/* bright */
"#555555",
"#ff5555",
"#55ff55",
"#ffff55",
"#5555ff",
"#ff55ff",
"#55ffff",
"#ffffff"
];
/* attributes bits:
0-3: bg
4-7: fg
8: bold
9: inverse
*/
this.def_attr = (7 << 4) | 0;
this.cur_attr = this.def_attr;
this.is_mac = (navigator.userAgent.indexOf("Mac") >=0 ) ? true : false;
this.key_rep_state = 0;
this.key_rep_str = "";
this.utf8 = true;
this.utf8_state = 0;
this.utf8_val = 0;
this.application_cursor = false;
this.application_keypad = false;
/* if true, emulate some behaviors of the Linux console */
this.linux_console = true;
this.textarea_has_focus = false;
}
Term.prototype.setKeyHandler = function(handler)
{
this.handler = handler;
}
/* return the size of a character in CSS pixels using the selected font */
function term_get_char_size(parent_el, font_size)
{
var el, g, ret;
el = document.createElement("div");
el.classList.add("term", "term_char_size");
el.style.fontSize = font_size + "px";
el.textContent = "W";
parent_el.appendChild(el);
g = el.getBoundingClientRect();
/* the character width & height may not be an integer */
ret = [g.width, g.height];
return ret;
}
Term.prototype.open = function(parent_el)
{
var y, line, i, term, c, row_el, char_size_ret;
/* set initial content */
this.lines = new Array();
c = 32 | (this.def_attr << 16);
for(y = 0; y < this.cur_h;y++) {
line = new Array();
for(i=0;i<this.w;i++)
line[i] = c;
this.lines[y] = line;
}
char_size_ret = term_get_char_size(parent_el, this.font_size);
/* size of the character in CSS pixels */
this.char_width = char_size_ret[0];
this.char_height = char_size_ret[1];
this.scrollbar_width = 15;
/* size of term_el in CSS pixels */
this.term_width = Math.ceil(this.w * this.char_width) +
this.scrollbar_width;
this.term_height = Math.ceil(this.h * this.char_height);
/* create the terminal window */
this.term_el = document.createElement("div");
this.term_el.className = "term";
/* XXX: could compute the font metrics */
this.term_el.style.fontSize = this.font_size + "px";
this.term_el.style.width = this.term_width + "px";
this.term_el.style.height = this.term_height + "px";
/* allow the terminal to take the focus */
this.term_el.setAttribute("tabindex", "0");
/* scroll bar */
this.scrollbar_el = document.createElement("div");
this.scrollbar_el.className = "term_scrollbar";
this.scrollbar_el.style.width = this.scrollbar_width + "px";
this.term_el.appendChild(this.scrollbar_el);
this.track_el = document.createElement("div");
this.track_el.className = "term_track";
this.track_el.onmousedown = this.mouseMoveHandler.bind(this);
this.scrollbar_el.appendChild(this.track_el);
this.thumb_el = document.createElement("div");
this.thumb_el.className = "term_thumb";
this.thumb_el.onmousedown = this.mouseDownHandler.bind(this);
this.track_el.appendChild(this.thumb_el);
this.end_el = document.createElement("div");
this.end_el.className = "term_end";
this.thumb_el.appendChild(this.end_el);
/* current scrollbar position */
this.thumb_size = -1;
this.thumb_pos = -1;
/* terminal content */
this.content_el = document.createElement("div");
this.content_el.className = "term_content";
this.content_el.style.width = (this.w) + "ch";
this.term_el.appendChild(this.content_el);
this.rows_el = [];
for(y=0;y<this.h;y++) {
row_el = document.createElement("div");
this.rows_el.push(row_el);
this.content_el.appendChild(row_el);
}
/* dummy textarea to get the input events and for the virtual
keyboard on mobile devices */
this.textarea_el = document.createElement("textarea");
this.textarea_el.classList.add("term_textarea");
this.textarea_el.setAttribute("autocorrect", "off");
this.textarea_el.setAttribute("autocapitalize", "off");
this.textarea_el.setAttribute("spellcheck", "false");
this.textarea_el.setAttribute("tabindex", "-1");
this.term_el.appendChild(this.textarea_el);
this.parent_el = parent_el;
parent_el.appendChild(this.term_el);
this.refresh(0, this.h - 1);
/* textarea_el events */
// key handler
this.textarea_el.addEventListener("keydown",
this.keyDownHandler.bind(this), true);
this.textarea_el.addEventListener("keyup",
this.keyUpHandler.bind(this), true);
/* keypress is deprecated, so use input */
this.textarea_el.addEventListener("input",
this.inputHandler.bind(this), true);
this.textarea_el.addEventListener("focus",
this.focusHandler.bind(this), true);
this.textarea_el.addEventListener("blur",
this.blurHandler.bind(this), true);
/* term_el events */
this.term_el.addEventListener("keydown",
this.termKeyDownHandler.bind(this),
true);
this.term_el.addEventListener("paste",
this.pasteHandler.bind(this), true);
this.term_el.addEventListener("mouseup",
this.termMouseUpHandler.bind(this),
true);
this.term_el.addEventListener("wheel",
this.wheelHandler.bind(this), false);
// cursor blinking
term = this;
setInterval(function() { term.cursor_timer_cb(); }, 1000);
this.term_el.focus();
};
Term.prototype.refresh_scrollbar = function ()
{
var total_size, thumb_pos, thumb_size, y, y0;
total_size = this.term_el.clientHeight;
thumb_size = Math.ceil(this.h * total_size / this.cur_h);
/* position of the first line of the scroll back buffer */
y0 = (this.y_base + this.h) % this.cur_h;
y = this.y_disp - y0;
if (y < 0)
y += this.cur_h;
thumb_pos = Math.floor(y * total_size / this.cur_h);
thumb_size = Math.max(thumb_size, 30);
thumb_size = Math.min(thumb_size, total_size);
thumb_pos = Math.min(thumb_pos, total_size - thumb_size);
// console.log("pos=" + thumb_pos + " size=" + thumb_size);
if (thumb_pos != this.thumb_pos || thumb_size != this.thumb_size) {
this.thumb_pos = thumb_pos;
this.thumb_size = thumb_size;
this.thumb_el.style.top = thumb_pos + "px";
this.thumb_el.style.height = thumb_size + "px";
}
}
/* move the text area at the cursor position so that the browser shows
* the correct position when the virtual keyboard is used */
Term.prototype.move_textarea = function()
{
var x, y, base_x, base_y, pos;
pos = this.term_el.getBoundingClientRect();
base_x = pos.left + window.scrollX;
base_y = pos.top + window.scrollY;
/* position relative to the body */
x = Math.ceil(this.x * this.char_width + base_x);
y = Math.ceil(this.y * this.char_height + base_y);
this.textarea_el.style.width = Math.ceil(this.char_width) + "px";
this.textarea_el.style.height = Math.ceil(this.char_height) + "px";
this.textarea_el.style.left = x + "px";
this.textarea_el.style.top = y + "px";
this.textarea_el.style.zIndex = 1000;
}
Term.prototype.refresh = function(ymin, ymax)
{
var el, y, line, outline, c, w, i, j, cx, attr, last_attr, fg, bg, y1;
var http_link_len, http_link_str, bold, tmp, inverse;
function is_http_link_char(c)
{
var str = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~:/?#[]@!$&'()*+,;=`.";
return str.indexOf(String.fromCharCode(c)) >= 0;
}
function right_trim(str, a)
{
var i, n;
n = a.length;
i = str.length;
while (i >= n && str.substr(i - n, n) == a)
i -= n;
return str.substr(0, i);
}
for(y = ymin; y <= ymax; y++) {
/* convert to HTML string */
y1 = y + this.y_disp;
if (y1 >= this.cur_h)
y1 -= this.cur_h;
line = this.lines[y1];
outline = "";
w = this.w;
if (y == this.y && this.cursor_state &&
this.y_disp == this.y_base) {
cx = this.x;
} else {
cx = -1;
}
last_attr = this.def_attr;
http_link_len = 0;
for(i = 0; i < w; i++) {
c = line[i];
attr = c >> 16;
c &= 0xffff;
/* test for http link */
if (c == 0x68 && (w - i) >= 8 && http_link_len == 0) {
/* test http:// or https:// */
if ((line[i + 1] & 0xffff) == 0x74 &&
(line[i + 2] & 0xffff) == 0x74 &&
(line[i + 3] & 0xffff) == 0x70 &&
(((line[i + 4] & 0xffff) == 0x3a &&
(line[i + 5] & 0xffff) == 0x2f &&
(line[i + 6] & 0xffff) == 0x2f) ||
((line[i + 4] & 0xffff) == 0x73 &&
(line[i + 5] & 0xffff) == 0x3a &&
(line[i + 6] & 0xffff) == 0x2f &&
(line[i + 7] & 0xffff) == 0x2f))) {
http_link_str = "";
j = 0;
while ((i + j) < w &&
is_http_link_char(line[i + j] & 0xffff)) {
http_link_str += String.fromCharCode(line[i + j] & 0xffff);
j++;
}
http_link_len = j;
if (last_attr != this.def_attr) {
outline += '</span>';
last_attr = this.def_attr;
}
outline += "<a href='" + http_link_str + "'>";
}
}
if (i == cx) {
attr = -1; /* cursor */
}
if (attr != last_attr) {
if (last_attr != this.def_attr)
outline += '</span>';
if (attr != this.def_attr) {
if (attr == -1) {
/* cursor */
outline += '<span class="term_cursor">';
} else {
outline += '<span style="';
fg = (attr >> 4) & 0xf;
bg = attr & 0xf;
bold = (attr >> 8) & 1;
inverse = (attr >> 9) & 1;
if (inverse) {
tmp = fg;
fg = bg;
bg = tmp;
}
if (bold) {
/* metrics are not OK for all fonts, so disabled */
/* outline += 'font-weight:bold;'; */
/* use the bright color */
if (fg < 8)
fg += 8;
}
if (fg != 7) {
outline += 'color:' + this.colors[fg] + ';';
}
if (bg != 0) {
outline += 'background-color:' +
this.colors[bg] + ';';
}
outline += '">';
}
}
}
switch(c) {
case 32:
outline += " ";
break;
case 38: // '&'
outline += "&";
break;
case 60: // '<'
outline += "<";
break;
case 62: // '>'
outline += ">";
break;
default:
if (c < 32) {
outline += " ";
} else {
outline += String.fromCharCode(c);
}
break;
}
last_attr = attr;
if (http_link_len != 0) {
http_link_len--;
if (http_link_len == 0) {
if (last_attr != this.def_attr) {
outline += '</span>';
last_attr = this.def_attr;
}
outline += "</a>";
}
}
}
if (last_attr != this.def_attr) {
outline += '</span>';
}
/* trim trailing spaces for copy/paste */
outline = right_trim(outline, " ");
if (outline == "")
outline = " ";
this.rows_el[y].innerHTML = outline;
}
this.refresh_scrollbar();
this.move_textarea();
};
Term.prototype.cursor_timer_cb = function()
{
this.cursor_state ^= 1;
this.refresh(this.y, this.y);
};
Term.prototype.show_cursor = function()
{
if (!this.cursor_state) {
this.cursor_state = 1;
this.refresh(this.y, this.y);
}
};
/* scroll down or up in the scroll back buffer by n lines */
Term.prototype.scroll_disp = function(n)
{
var i, y1;
/* slow but it does not really matters */
if (n >= 0) {
for(i = 0; i < n; i++) {
if (this.y_disp == this.y_base)
break;
if (++this.y_disp == this.cur_h)
this.y_disp = 0;
}
} else {
n = -n;
y1 = this.y_base + this.h;
if (y1 >= this.cur_h)
y1 -= this.cur_h;
for(i = 0; i < n; i++) {
if (this.y_disp == y1)
break;
if (--this.y_disp < 0)
this.y_disp = this.cur_h - 1;
}
}
this.refresh(0, this.h - 1);
};
Term.prototype.write = function(str)
{
//// Begin Test: Handle Emulator Notification: {"nuttxemu":{"gpio29":1}}
if (str.indexOf(`{"nuttxemu":`) == 0) {
const notify = JSON.parse(str).nuttxemu; // {gpio29:1}
console.log({ notify });
const gpio = Object.keys(notify)[0]; // "gpio29"
const val = notify[gpio]; // 0 or 1
console.log({ gpio, val });
document.getElementById("status").style.width = document.getElementById("term_wrap").style.width;
const gpio_status = document.getElementById(gpio);
gpio_status.style.display = "block";
gpio_status.className = (val == 0)
? "gpio_off"
: "gpio_on";
return;
}
//// End Test
var s, ymin, ymax;
function update(y)
{
ymin = Math.min(ymin, y);
ymax = Math.max(ymax, y);
}
function get_erase_char()
{
var bg_mask, attr;
bg_mask = 0xf;
attr = (s.def_attr & ~bg_mask) | (s.cur_attr & bg_mask);
return 32 | (attr << 16);
}
function erase_chars(x1, x2, y) {
var l, i, c, y1;
y1 = s.y_base + y;
if (y1 >= s.cur_h)
y1 -= s.cur_h;
l = s.lines[y1];
c = get_erase_char();
for(i = x1; i < x2; i++)
l[i] = c;
update(y);
}
function erase_to_eol(x, y) {
erase_chars(x, s.w, y);
}
function erase_in_line(n) {
switch(n) {
case 0:
erase_to_eol(s.x, s.y);
break;
case 1:
erase_chars(0, s.x + 1, s.y);
break;
case 2:
erase_chars(0, s.w, s.y);
break;
}
}
function erase_in_display(n) {
var y;
switch(n) {
case 0:
erase_to_eol(s.x, s.y);
for(y = s.y + 1; y < s.h; y++)
erase_to_eol(0, y);
break;
case 1:
erase_chars(0, s.x + 1, s.y);
for(y = 0; y < s.y; y++) {
erase_to_eol(0, y);
}
break;
case 2:
for(y = 0; y < s.h; y++) {
erase_to_eol(0, y);
}
break;
}
}
function delete_chars(n)
{
var l, i, c, y1, j;
y1 = s.y + s.y_base;
if (y1 >= s.cur_h)
y1 -= s.cur_h;
l = s.lines[y1];
if (n < 1)
n = 1;
c = get_erase_char();
j = s.x + n;
for(i = s.x; i < s.w; i++) {
if (j < s.w)
l[i] = l[j];
else
l[i] = c;
j++;
}
update(s.y);
}
function insert_chars(n)
{
var l, i, c, y1, x1;
if (n < 1)
n = 1;
if (n > s.w - s.x)
n = s.w - s.x;
y1 = s.y + s.y_base;
if (y1 >= s.cur_h)
y1 -= s.cur_h;
l = s.lines[y1];
x1 = s.x + n;
for(i = s.w - 1; i >= x1; i--)
l[i] = l[i - n];
c = get_erase_char();
for(i = s.x; i < x1; i++)
l[i] = c;
update(s.y);
}
function csi_colors(esc_params)
{
var j, n, fg, bg, mask;
if (esc_params.length == 0) {
s.cur_attr= s.def_attr;
} else {
for(j = 0; j < esc_params.length; j++) {
n = esc_params[j];
if (n >= 30 && n <= 37) {
/* foreground */
fg = n - 30;
s.cur_attr = (s.cur_attr & ~(0xf << 4)) | (fg << 4);
} else if (n >= 40 && n <= 47) {
/* background */
bg = n - 40;
s.cur_attr = (s.cur_attr & ~0xf) | bg;
} else if (n >= 90 && n <= 97) {
/* bright foreground */
fg = n - 90 + 8;
s.cur_attr = (s.cur_attr & ~(0xf << 4)) | (fg << 4);
} else if (n >= 100 && n <= 107) {
/* bright background */
bg = n - 100 + 8;
s.cur_attr = (s.cur_attr & ~0xf) | bg;
} else if (n == 1) {
/* bold + bright */
s.cur_attr |= (1 << 8);
} else if (n == 0) {
/* default attr */
s.cur_attr = s.def_attr;
} else if (n == 7) {
/* inverse */
s.cur_attr |= (1 << 9);
} else if (n == 27) {
/* not inverse */
s.cur_attr &= ~(1 << 9);
} else if (n == 39) {
/* reset fg */
mask = 0x0f << 4;
s.cur_attr = (s.cur_attr & ~mask) | (s.def_attr & mask);
} else if (n == 49) {
/* reset bg */
mask = 0x0f;
s.cur_attr = (s.cur_attr & ~mask) | (s.def_attr & mask);
}
}
}
}
function empty_line(y, use_erase_char) {
var line, c, y1, x;
if (use_erase_char)
c = get_erase_char();
else
c = 32 | (s.def_attr << 16);
line = new Array();
for(x=0;x<s.w;x++)
line[x] = c;
y1 = s.y_base + y;
if (y1 >= s.cur_h)
y1 -= s.cur_h;
s.lines[y1] = line;
}
function scroll_down(top, bottom, use_erase_char)
{
var y, line, y1, y2;
if (top == 0 && bottom == s.h) {
/* increase height of buffer if possible */
if (s.cur_h < s.tot_h) {
s.cur_h++;
}
/* move down one line */
if (++s.y_base == s.cur_h)
s.y_base = 0;
s.y_disp = s.y_base;
} else {
/* partial scroll */
for(y = top; y < bottom - 1; y++) {
y1 = s.y_base + y;
if (y1 >= s.cur_h)
y1 -= s.cur_h;
y2 = y1 + 1;
if (y2 >= s.cur_h)
y2 -= s.cur_h;
s.lines[y1] = s.lines[y2];
}
}
empty_line(bottom - 1, use_erase_char);
update(top);
update(bottom - 1);
}
function scroll_up(top, bottom, use_erase_char) {
var y, y1, y2;
/* XXX: could scroll in the history */
for(y = bottom - 1; y > top; y--) {
y1 = s.y_base + y;
if (y1 >= s.cur_h)
y1 -= s.cur_h;
y2 = y1 - 1;
if (y2 >= s.cur_h)
y2 -= s.cur_h;
s.lines[y1] = s.lines[y2];
}
empty_line(top, use_erase_char);
update(top);
update(bottom - 1);
}
function down_with_scroll() {
s.y++;
if (s.y == s.scroll_bottom) {
s.y--;
scroll_down(s.scroll_top, s.scroll_bottom, false);
} else if (s.y >= s.h) {
s.y--;
scroll_down(0, s.h, false);
}
}
function up_with_scroll() {
if (s.y == s.scroll_top) {
scroll_up(s.scroll_top, s.scroll_bottom, true);
} else if (s.y == 0) {
scroll_up(0, s.h, true);
} else {
s.y--;
}
}
function insert_lines(n) {
var y2;
if (n < 1)
n = 1;
if (s.y < s.scroll_bottom)
y2 = s.scroll_bottom;
else
y2 = s.h;
while (n != 0) {
scroll_up(s.y, y2, true);
n--;
}
}
function delete_lines(n) {
var y2;
if (n < 1)
n = 1;
if (s.y < s.scroll_bottom)
y2 = s.scroll_bottom;
else
y2 = s.h;
while (n != 0) {
scroll_down(s.y, y2, true);
n--;
}
}
var TTY_STATE_NORM = 0;
var TTY_STATE_ESC = 1;
var TTY_STATE_CSI = 2;
var TTY_STATE_CHARSET = 3;
function handle_char(c) {
var i, l, n, j, y1, y2, x1;
switch(s.state) {
case TTY_STATE_NORM:
switch(c) {
case 10:
down_with_scroll();
break;
case 13:
s.x = 0;
break;
case 8:
if (s.x > 0) {
s.x--;
}
break;
case 9: /* tab */
n = (s.x + 8) & ~7;
if (n <= s.w) {
s.x = n;
}
break;
case 27:
s.state = TTY_STATE_ESC;
break;
default:
if (c >= 32) {
if (s.x >= s.w) {
s.x = 0;
down_with_scroll();
}
y1 = s.y + s.y_base;
if (y1 >= s.cur_h)
y1 -= s.cur_h;
s.lines[y1][s.x] = (c & 0xffff) |
(s.cur_attr << 16);
s.x++;
update(s.y);
}
break;
}
break;
case TTY_STATE_ESC:
switch(c) {
case 91: // '['
s.esc_params = new Array();
s.cur_param = 0;
s.esc_prefix = 0;
s.state = TTY_STATE_CSI;
break;
case 40: // '('
case 41: // ')'
s.state = TTY_STATE_CHARSET;
break;
case 61: // '='
s.application_keypad = true;
s.state = TTY_STATE_NORM;
break;
case 62: // '>'
s.application_keypad = false;
s.state = TTY_STATE_NORM;
break;
case 77: // 'M'
up_with_scroll();
s.state = TTY_STATE_NORM;
break;
default:
s.state = TTY_STATE_NORM;
break;
}
break;
case TTY_STATE_CSI:
if (c >= 48 && c <= 57) { // '0' '9'
/* numeric */
s.cur_param = s.cur_param * 10 + c - 48;
} else {
if (c == 63) { // '?'
s.esc_prefix = c;
break;
}
/* add parsed parameter */
s.esc_params[s.esc_params.length] = s.cur_param;
s.cur_param = 0;
if (c == 59) // ;
break;
s.state = TTY_STATE_NORM;
// console.log("term: csi=" + s.esc_params + " cmd="+c);
switch(c) {
case 64: // '@' insert chars
insert_chars(s.esc_params[0]);
break;
case 65: // 'A' up
n = s.esc_params[0];
if (n < 1)
n = 1;
s.y -= n;
if (s.y < 0)
s.y = 0;
break;
case 66: // 'B' down
n = s.esc_params[0];
if (n < 1)
n = 1;
s.y += n;
if (s.y >= s.h)
s.y = s.h - 1;
break;
case 67: // 'C' right
n = s.esc_params[0];
if (n < 1)
n = 1;
s.x += n;
if (s.x >= s.w - 1)
s.x = s.w - 1;
break;
case 68: // 'D' left
n = s.esc_params[0];
if (n < 1)
n = 1;
s.x -= n;
if (s.x < 0)
s.x = 0;
break;
case 71: /* 'G' cursor character absolute */
x1 = s.esc_params[0] - 1;
if (x1 < 0)
x1 = 0;
else if (x1 >= s.w)
x1 = s.w - 1;
s.x = x1;
break;
case 72: // 'H' goto xy
y1 = s.esc_params[0] - 1;
if (s.esc_params.length >= 2)
x1 = s.esc_params[1] - 1;
else
x1 = 0;
if (y1 < 0)
y1 = 0;
else if (y1 >= s.h)
y1 = s.h - 1;
if (x1 < 0)
x1 = 0;
else if (x1 >= s.w)
x1 = s.w - 1;
s.x = x1;
s.y = y1;
break;
case 74: // 'J' erase in display
erase_in_display(s.esc_params[0]);
break;
case 75: // 'K' erase in line
erase_in_line(s.esc_params[0]);
break;
case 76: // 'L' insert lines
insert_lines(s.esc_params[0]);
break;
case 77: // 'M' insert lines
delete_lines(s.esc_params[0]);
break;
case 80: // 'P'
delete_chars(s.esc_params[0]);
break;
case 100: // 'd' line position absolute
{
y1 = s.esc_params[0] - 1;
if (y1 < 0)
y1 = 0;
else if (y1 >= s.h)
y1 = s.h - 1;
s.y = y1;
}
break;
case 104: // 'h': set mode
if (s.esc_prefix == 63 && s.esc_params[0] == 1) {
s.application_cursor = true;
}
break;
case 108: // 'l': reset mode
if (s.esc_prefix == 63 && s.esc_params[0] == 1) {
s.application_cursor = false;
}
break;
case 109: // 'm': set color
csi_colors(s.esc_params);
break;
case 110: // 'n' return the cursor position
s.queue_chars("\x1b[" + (s.y + 1) + ";" + (s.x + 1) + "R");
break;
case 114: // 'r' set scroll region
y1 = s.esc_params[0] - 1;
if (y1 < 0)
y1 = 0;
else if (y1 >= s.h)
y1 = s.h - 1;
if (s.esc_params.length >= 2)
y2 = s.esc_params[1];
else
y2 = s.h;
if (y2 >= s.h || y2 <= y1)
y2 = s.h;
s.scroll_top = y1;
s.scroll_bottom = y2;
s.x = 0;
s.y = 0;
break;
default:
break;
}
}
break;
case TTY_STATE_CHARSET:
/* just ignore */
s.state = TTY_STATE_NORM;
break;