// Terminal page: shells on one or more machines, in tabs. With one tab the
// page is a plain terminal and a faint "+" in the corner; a second tab brings
// the tab strip in. On a computer a tab can be dragged onto the current one
// to share it - up to four terminals, split side by side or one above the
// other - and a terminal dragged out of it back to the strip. Splits resize
// by their gutters; a tab is renamed by a double click on its title.
(function () {
'use strict';
const PAGE = window.TERM_PAGE;
const touch = matchMedia('(pointer: coarse)').matches;
const desk = !touch; // drag and drop, splits: computers only
if (touch) document.body.classList.add('touch');
const $ = id => document.getElementById(id);
const statusEl = $('status'), area = $('area'), tablist = $('tablist'), addBtn = $('tabadd'),
floatAdd = $('floatadd'), addMenu = $('addmenu'), hint = $('hint'), mark = $('tabmark');
const base = '/api/panel/term/';
const GAP = 6;
const X = '';
function bytesToB64(bytes) {
let bin = '';
for (let i = 0; i < bytes.length; i++) bin += String.fromCharCode(bytes[i]);
return btoa(bin);
}
function b64ToBytes(b64) {
const bin = atob(b64), u = new Uint8Array(bin.length);
for (let i = 0; i < bin.length; i++) u[i] = bin.charCodeAt(i);
return u;
}
// ---------- one shell ----------
class Session {
constructor(agent) {
this.agent = agent;
this.sid = null; this.closed = false; this.connected = false;
this.state = 'wait'; this.text = 'подключение…';
this.inSeq = 0; this.inBusy = false; this.inQueue = [];
this.el = document.createElement('div');
this.el.className = 'pane';
this.el.innerHTML = '
' +
'
' +
'';
this.el.querySelector('.pane-title').textContent = agent.user + '@' + agent.host;
this.el.querySelector('.pane-title').title = agent.name;
this.term = new Terminal({
cursorBlink: true, fontSize: touch ? 13 : 14,
fontFamily: 'ui-monospace, SFMono-Regular, Menlo, monospace', theme: { background: '#0c0f13' }
});
this.fitter = new FitAddon.FitAddon();
this.term.loadAddon(this.fitter);
this.term.open(this.el.querySelector('.pane-body'));
this.term.onData(d => this.send(TermKeys.withMods(d)));
this.term.onResize(() => this.queueIn({ t: 'r', cols: this.term.cols, rows: this.term.rows }));
this.term.onSelectionChange(() => TermKeys.selectionChanged(this));
this.el.addEventListener('pointerdown', () => setActivePane(this), true);
this.term.textarea.addEventListener('focus', () => setActivePane(this));
this.el.querySelector('.pane-x').onclick = ev => { ev.stopPropagation(); closePane(this); };
if (desk) this.el.querySelector('.pane-head').addEventListener('pointerdown', ev => startDrag(ev, 'pane', this));
this.open();
}
setState(state, text) {
this.state = state; this.text = text;
this.el.querySelector('.dot').className = 'dot ' + state;
const t = tabOf(this);
if (t) renderTab(t);
showStatus();
}
async open() {
try {
const r = await fetch(base + encodeURIComponent(this.agent.id) + '/open', { method: 'POST' });
if (!r.ok) {
this.setState('err', 'ошибка открытия (' + r.status + ')');
this.term.write('\r\n\x1b[31m[не удалось открыть сессию: HTTP ' + r.status + ']\x1b[0m\r\n');
return;
}
this.sid = (await r.json()).session_id;
this.setState('wait', 'ожидание агента…');
this.fit();
// A WebSocket if it connects; the long polls otherwise, and from a
// dropped WebSocket on for the rest of this session.
if (!(await this.openWS())) this.poll();
this.queueIn({ t: 'r', cols: this.term.cols, rows: this.term.rows });
} catch (e) {
this.setState('err', 'ошибка сети');
this.term.write('\r\n\x1b[31m[ошибка сети: ' + (e && e.message ? e.message : e) + ']\x1b[0m\r\n');
}
}
openWS() {
return new Promise(resolve => {
if (!window.WebSocket) { resolve(false); return; }
const ws = new WebSocket((location.protocol === 'https:' ? 'wss://' : 'ws://') + location.host + base + this.sid + '/ws');
let opened = false;
const timer = setTimeout(() => { if (!opened) { ws.close(); resolve(false); } }, 5000);
ws.onopen = () => { opened = true; clearTimeout(timer); this.ws = ws; resolve(true); };
ws.onmessage = ev => {
let j;
try { j = JSON.parse(ev.data); } catch (e) { return; }
this.take(j);
};
ws.onclose = () => {
clearTimeout(timer);
if (!opened) { resolve(false); return; }
this.ws = null;
if (!this.closed && !this.ended) this.poll();
};
});
}
// take applies one answer of the output channel, either transport's.
take(j) {
if (j.closed) { this.finish('[сессия завершена]'); return false; }
for (const f of j.frames || []) {
if (f.exit) { this.finish('[сессия завершена]'); return false; }
if (f.data) {
if (!this.connected) { this.connected = true; this.setState('ok', 'подключено'); }
this.term.write(b64ToBytes(f.data));
}
}
return true;
}
async poll() {
while (!this.closed && this.sid) {
let r;
try { r = await fetch(base + this.sid + '/out', { cache: 'no-store' }); }
catch (e) { await new Promise(res => setTimeout(res, 1000)); continue; }
if (this.closed) return;
if (!r.ok) { this.finish('[соединение закрыто]'); return; }
if (!this.take(await r.json())) return;
}
}
finish(msg) {
if (this.ended) return;
this.ended = true;
this.setState('off', 'соединение закрыто');
this.term.write('\r\n\x1b[33m' + msg + '\x1b[0m\r\n');
}
// Input goes out one request at a time, so on a slow link a keystroke can
// never overtake the one before it; a request that fails goes again under
// the same number, and the server drops one it already has.
queueIn(m) {
if (this.closed || !this.sid) return;
const q = this.inQueue, last = q[q.length - 1];
if (last && last.t === 'i' && m.t === 'i') last.text += m.text;
else if (last && last.t === 'r' && m.t === 'r') q[q.length - 1] = m;
else q.push(m);
this.pumpIn();
}
async pumpIn() {
if (this.inBusy || !this.inQueue.length) return;
this.inBusy = true;
while (this.inQueue.length && !this.closed) {
const m = this.inQueue.shift();
const body = m.t === 'i'
? { t: 'i', d: bytesToB64(new TextEncoder().encode(m.text)), seq: ++this.inSeq }
: { t: 'r', cols: m.cols, rows: m.rows, seq: ++this.inSeq };
// On the WebSocket a message goes out in order with no answer to wait
// for; numbered as well, so a repeat by the long polls is dropped.
if (this.ws && this.ws.readyState === 1) {
try { this.ws.send(JSON.stringify(body)); continue; } catch (e) { /* by request below */ }
}
for (let wait = 300; !this.closed; wait = Math.min(wait * 2, 5000)) {
let r = null;
try {
r = await fetch(base + this.sid + '/in', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(body) });
} catch (e) { /* no answer: send it again */ }
if (r && r.status < 500) break;
await new Promise(res => setTimeout(res, wait));
}
}
this.inBusy = false;
}
send(data) { this.queueIn({ t: 'i', text: data }); }
fit() {
const b = this.el.querySelector('.pane-body');
if (b.clientWidth > 20 && b.clientHeight > 20) { try { this.fitter.fit(); } catch (e) { /* not shown yet */ } }
}
close() {
if (this.closed) return;
this.closed = true;
if (this.ws) { try { this.ws.close(); } catch (e) { /* closed already */ } }
if (this.sid) fetch(base + this.sid + '/close', { method: 'POST', keepalive: true }).catch(() => {});
this.term.dispose();
this.el.remove();
}
}
// ---------- tabs ----------
const tabs = [];
let active = null, activePane = null;
const tabOf = s => tabs.find(t => t.panes.includes(s));
function makeTab(panes, index) {
const t = { title: null, panes: panes, layout: panes.length === 1 ? '1' : 'h', c: 0.5, r: 0.5, gutters: [] };
t.view = document.createElement('div');
t.view.className = 'tabview';
area.insertBefore(t.view, hint);
panes.forEach(s => t.view.appendChild(s.el));
t.el = document.createElement('div');
t.el.className = 'tab enter';
t.el.innerHTML = '' +
'';
t.el.addEventListener('click', ev => { if (!ev.target.closest('.tab-x, input') && !dragJustEnded) activate(t); });
t.el.querySelector('.tab-x').onclick = ev => { ev.stopPropagation(); closeTab(t); };
t.el.querySelector('.tab-title').addEventListener('dblclick', ev => { ev.stopPropagation(); rename(t); });
if (desk) t.el.addEventListener('pointerdown', ev => { if (!ev.target.closest('.tab-x, input')) startDrag(ev, 'tab', t); });
const at = index == null ? tabs.length : index;
tablist.insertBefore(t.el, tabs[at] ? tabs[at].el : mark);
tabs.splice(at, 0, t);
renderTab(t);
fitTabs();
requestAnimationFrame(() => requestAnimationFrame(() => t.el.classList.remove('enter')));
return t;
}
function tabTitle(t) {
if (t.title) return t.title;
const a = t.panes[0].agent;
return t.panes.length > 1 ? a.name + ' +' + (t.panes.length - 1) : a.name;
}
// Tab widths: as wide as the title wants, from a comfortable minimum up to
// a maximum; when they do not fit, all give way evenly down to a floor,
// titles cut with "…", and below the floor the strip scrolls instead.
const ruler = document.createElement('canvas').getContext('2d');
const W = touch ? { min: 76, base: 108, max: 170, font: 12 } : { min: 96, base: 150, max: 280, font: 13 };
const CHROME = touch ? 52 : 62; // padding, dot, gaps, close button, borders
function fitTabs() {
ruler.font = W.font + 'px ' + getComputedStyle(document.body).fontFamily;
const live = tabs;
const want = live.map(t => Math.min(W.max, Math.max(W.base, Math.ceil(ruler.measureText(tabTitle(t)).width) + CHROME)));
const strip = $('tabs');
const room = strip.clientWidth - parseFloat(getComputedStyle(strip).paddingLeft) * 2 - addBtn.offsetWidth - 4 * (live.length + 1);
let cap = W.max;
if (want.reduce((a, b) => a + b, 0) > room) {
// The widest give way first, to one width for all at the most.
let lo = W.min, hi = W.max;
for (let k = 0; k < 20; k++) {
const mid = (lo + hi) / 2;
if (want.reduce((a, b) => a + Math.min(b, mid), 0) > room) hi = mid; else lo = mid;
}
cap = Math.max(W.min, Math.floor(lo));
}
live.forEach((t, i) => { t.el.style.width = Math.min(want[i], cap) + 'px'; });
}
window.addEventListener('resize', () => fitTabs());
function renderTab(t) {
t.el.querySelector('.tab-title').textContent = tabTitle(t);
requestAnimationFrame(fitTabs);
t.el.title = t.panes.map(s => s.agent.user + '@' + s.agent.host).join(', ');
// The tab's dot: red if any shell failed, amber while one connects.
const st = t.panes.map(s => s.state);
t.el.querySelector('.dot').className = 'dot ' + (st.includes('err') ? 'err' : st.includes('wait') ? 'wait' : st.includes('ok') ? 'ok' : 'off');
t.el.classList.toggle('on', t === active);
t.view.classList.toggle('split', t.panes.length > 1);
}
function activate(t) {
if (!t) return;
active = t;
tabs.forEach(x => { x.view.classList.toggle('on', x === t); renderTab(x); });
if (!t.panes.includes(activePane)) setActivePane(t.panes[0]);
layout(t, false);
t.el.scrollIntoView({ block: 'nearest', inline: 'nearest', behavior: 'smooth' });
if (desk && activePane) activePane.term.focus();
updateMode();
}
function setActivePane(s) {
activePane = s;
document.querySelectorAll('.pane.active').forEach(p => p.classList.toggle('active', p === s.el));
s.el.classList.add('active');
showStatus();
}
function showStatus() {
if (!activePane) { statusEl.textContent = ''; return; }
statusEl.textContent = activePane.text;
statusEl.className = activePane.state === 'ok' ? 'st-ok' : activePane.state === 'err' ? 'st-err' : 'muted';
}
// One tab: a plain terminal, the strip folded into the corner "+".
function updateMode() {
const multi = tabs.length > 1;
if (document.body.classList.contains('multi') === multi) return;
document.body.classList.toggle('multi', multi);
setTimeout(() => active && layout(active, false), 280);
}
function openTerminal(agent) {
$('empty').hidden = true;
const t = makeTab([new Session(agent)]);
activate(t);
}
function closeTab(t) {
const i = tabs.indexOf(t);
if (i < 0) return;
if (t.panes.length > 1 && !confirm('Закрыть вкладку с ' + t.panes.length + ' терминалами?')) return;
tabs.splice(i, 1);
t.panes.forEach(s => s.close());
t.el.classList.add('leave');
t.view.classList.remove('on');
setTimeout(() => { t.el.remove(); t.view.remove(); }, 220);
if (active === t) {
active = null;
activate(tabs[Math.min(i, tabs.length - 1)]);
}
if (!tabs.length) { activePane = null; showStatus(); $('empty').hidden = false; }
updateMode();
}
function rename(t) {
const span = t.el.querySelector('.tab-title');
const inp = document.createElement('input');
inp.className = 'tab-edit';
inp.value = tabTitle(t);
inp.size = Math.max(6, inp.value.length);
span.replaceWith(inp);
inp.focus(); inp.select();
let done = false;
const end = save => {
if (done) return;
done = true;
if (save) t.title = inp.value.trim() || null;
inp.replaceWith(span);
renderTab(t);
};
inp.onkeydown = ev => { if (ev.key === 'Enter') end(true); else if (ev.key === 'Escape') end(false); ev.stopPropagation(); };
inp.onblur = () => end(true);
inp.onpointerdown = ev => ev.stopPropagation();
}
// ---------- splits ----------
// Where each terminal of a tab goes, and its gutters, for a layout:
// 1, h (side by side), v (one above the other), top2 (two over one),
// bottom2 (one over two), grid (two over two). c and r are where the
// column and the row divide.
function rects(layout, c, r, W, H) {
const g = GAP, cw = Math.round((W - g) * c), rh = Math.round((H - g) * r);
const top = (y, h) => [{ x: 0, y, w: cw, h }, { x: cw + g, y, w: W - cw - g, h }];
const colG = (y, h) => ({ k: 'c', x: cw, y, w: g, h });
const rowG = { k: 'r', x: 0, y: rh, w: W, h: g };
const bottomY = rh + g, bottomH = H - rh - g;
switch (layout) {
case 'h': return { panes: top(0, H), gutters: [colG(0, H)] };
case 'v': return { panes: [{ x: 0, y: 0, w: W, h: rh }, { x: 0, y: bottomY, w: W, h: bottomH }], gutters: [rowG] };
case 'top2': return { panes: top(0, rh).concat([{ x: 0, y: bottomY, w: W, h: bottomH }]), gutters: [colG(0, rh), rowG] };
case 'bottom2': return { panes: [{ x: 0, y: 0, w: W, h: rh }].concat(top(bottomY, bottomH)), gutters: [colG(bottomY, bottomH), rowG] };
case 'grid': return { panes: top(0, rh).concat(top(bottomY, bottomH)), gutters: [colG(0, H), rowG] };
default: return { panes: [{ x: 0, y: 0, w: W, h: H }], gutters: [] };
}
}
function layout(t, animate) {
const W = t.view.clientWidth, H = t.view.clientHeight;
if (!W || !H) return;
const L = rects(t.layout, t.c, t.r, W, H);
t.view.classList.toggle('instant', !animate);
t.panes.forEach((s, i) => {
const p = L.panes[i];
s.el.style.left = p.x + 'px'; s.el.style.top = p.y + 'px';
s.el.style.width = p.w + 'px'; s.el.style.height = p.h + 'px';
});
while (t.gutters.length < L.gutters.length) {
const g = document.createElement('div');
g.className = 'gutter';
g.addEventListener('pointerdown', ev => startResize(ev, t, g));
t.view.appendChild(g);
t.gutters.push(g);
}
t.gutters.forEach((g, i) => {
const d = L.gutters[i];
g.hidden = !d;
if (!d) return;
g.className = 'gutter ' + d.k;
g.style.left = d.x + 'px'; g.style.top = d.y + 'px'; g.style.width = d.w + 'px'; g.style.height = d.h + 'px';
});
clearTimeout(t.fitTimer);
t.fitTimer = setTimeout(() => t.panes.forEach(s => s.fit()), animate ? 270 : 0);
}
function startResize(ev, t, g) {
ev.preventDefault();
g.setPointerCapture(ev.pointerId);
const box = t.view.getBoundingClientRect(), k = g.classList.contains('c') ? 'c' : 'r';
g.classList.add('drag');
let raf = 0;
const move = e => {
const v = k === 'c' ? (e.clientX - box.left) / box.width : (e.clientY - box.top) / box.height;
t[k] = Math.min(0.85, Math.max(0.15, v));
if (!raf) raf = requestAnimationFrame(() => { raf = 0; layout(t, false); });
};
const up = () => {
g.classList.remove('drag');
g.removeEventListener('pointermove', move);
g.removeEventListener('pointerup', up);
layout(t, false);
};
g.addEventListener('pointermove', move);
g.addEventListener('pointerup', up);
}
// A layout with one terminal fewer, the others keeping their places.
function withoutPane(layout, i) {
if (layout === 'h' || layout === 'v') return '1';
if (layout === 'top2') return i === 2 ? 'h' : 'v';
if (layout === 'bottom2') return i === 0 ? 'h' : 'v';
if (layout === 'grid') return i < 2 ? 'bottom2' : 'top2';
return '1';
}
function takePane(t, s) {
const i = t.panes.indexOf(s);
t.layout = withoutPane(t.layout, i);
t.panes.splice(i, 1);
}
function closePane(s) {
const t = tabOf(s);
if (!t) return;
if (t.panes.length === 1) { closeTab(t); return; }
takePane(t, s);
s.close();
if (activePane === s) setActivePane(t.panes[0]);
renderTab(t);
layout(t, true);
}
// Where a terminal dropped on tab t at (x, y) would go: the new layout,
// the order of its terminals ('P' the new one), and its place.
const SIDE = { left: 'слева', right: 'справа', top: 'сверху', bottom: 'снизу' };
function mergePlan(t, x, y) {
const n = t.panes.length, W = t.view.clientWidth, H = t.view.clientHeight;
const fx = x / W, fy = y / H;
let lay, order, label;
if (n === 1) {
const d = { left: fx, right: 1 - fx, top: fy, bottom: 1 - fy };
const k = Object.keys(d).reduce((a, b) => d[a] <= d[b] ? a : b);
lay = k === 'left' || k === 'right' ? 'h' : 'v';
order = k === 'left' || k === 'top' ? ['P', 0] : [0, 'P'];
label = SIDE[k];
} else if (n === 2 && t.layout === 'h') {
if (fy < 0.5) { lay = 'bottom2'; order = ['P', 0, 1]; label = 'сверху'; }
else { lay = 'top2'; order = [0, 1, 'P']; label = 'снизу'; }
} else if (n === 2) {
if (fy < 0.5) { lay = 'top2'; order = fx < 0.5 ? ['P', 0, 1] : [0, 'P', 1]; }
else { lay = 'bottom2'; order = fx < 0.5 ? [0, 'P', 1] : [0, 1, 'P']; }
label = (fy < 0.5 ? 'сверху ' : 'снизу ') + (fx < 0.5 ? 'слева' : 'справа');
} else if (n === 3) {
lay = 'grid';
if (t.layout === 'top2') { order = fx < 0.5 ? [0, 1, 'P', 2] : [0, 1, 2, 'P']; label = 'снизу ' + (fx < 0.5 ? 'слева' : 'справа'); }
else { order = fx < 0.5 ? ['P', 0, 1, 2] : [0, 'P', 1, 2]; label = 'сверху ' + (fx < 0.5 ? 'слева' : 'справа'); }
} else return null;
return { layout: lay, order, label, rect: rects(lay, t.c, t.r, W, H).panes[order.indexOf('P')] };
}
// ---------- drag and drop ----------
// A tab: along the strip to reorder it, or onto the current tab to join
// it. A terminal from a split, by its title bar: to the strip to make it a
// tab of its own, or onto another terminal of its tab to swap places.
let drag = null, dragJustEnded = false;
function startDrag(ev, kind, obj) {
if (ev.button !== 0) return;
drag = { kind, obj, x0: ev.clientX, y0: ev.clientY, on: false, id: ev.pointerId };
}
function beginDrag() {
drag.on = true;
const src = drag.kind === 'tab' ? drag.obj.el : drag.obj.el.querySelector('.pane-head');
const g = document.createElement('div');
g.className = 'drag-ghost ' + drag.kind;
g.textContent = drag.kind === 'tab' ? tabTitle(drag.obj) : drag.obj.agent.user + '@' + drag.obj.agent.host;
document.body.appendChild(g);
drag.ghost = g;
drag.src = src;
src.classList.add('dragging');
document.body.classList.add('dnd');
// Pulling a terminal out: the strip shows, one tab or not, to drop it on.
if (drag.kind === 'pane') document.body.classList.add('multi-hint');
}
function stripIndex(x) {
const others = tabs.filter(t => !(drag.kind === 'tab' && t === drag.obj));
let i = others.findIndex(t => { const r = t.el.getBoundingClientRect(); return x < r.left + r.width / 2; });
if (i < 0) i = others.length;
const ref = others[i] ? others[i].el.getBoundingClientRect() : (others.length ? others[others.length - 1].el.getBoundingClientRect() : null);
const lr = tablist.getBoundingClientRect();
const mx = others[i] ? ref.left - 3 : ref ? ref.right + 1 : lr.left;
return { i, others, mx: mx - lr.left + tablist.scrollLeft };
}
function showHint(r, label, bad) {
hint.hidden = false;
hint.classList.toggle('bad', !!bad);
const v = active.view;
hint.style.left = (v.offsetLeft + r.x) + 'px'; hint.style.top = (v.offsetTop + r.y) + 'px';
hint.style.width = r.w + 'px'; hint.style.height = r.h + 'px';
hint.textContent = label;
}
function onDragMove(ev) {
if (!drag || ev.pointerId !== drag.id) return;
if (!drag.on) {
if (Math.hypot(ev.clientX - drag.x0, ev.clientY - drag.y0) < 6) return;
beginDrag();
}
drag.ghost.style.transform = 'translate(' + (ev.clientX + 10) + 'px,' + (ev.clientY + 8) + 'px)';
drag.target = null;
hint.hidden = true; mark.hidden = true;
const strip = $('tabs').getBoundingClientRect();
const stripShown = document.body.classList.contains('multi') || document.body.classList.contains('multi-hint');
const inStrip = stripShown && ev.clientY >= strip.top - 6 && ev.clientY <= strip.bottom + 10;
const inArea = active && (() => { const r = active.view.getBoundingClientRect(); return ev.clientX >= r.left && ev.clientX <= r.right && ev.clientY >= r.top && ev.clientY <= r.bottom; })();
if (inStrip) {
const s = stripIndex(ev.clientX);
mark.hidden = false; mark.style.left = s.mx + 'px';
drag.target = { kind: 'strip', index: s.i, others: s.others };
drag.ghost.dataset.hint = drag.kind === 'tab' ? 'переставить' : 'отдельной вкладкой';
} else if (inArea && drag.kind === 'tab' && drag.obj !== active) {
const r = active.view.getBoundingClientRect();
if (drag.obj.panes.length > 1) {
showHint({ x: 0, y: 0, w: r.width, h: r.height }, 'вкладку с несколькими терминалами не объединить', true);
} else if (active.panes.length >= 4) {
showHint({ x: 0, y: 0, w: r.width, h: r.height }, 'в одной вкладке не больше 4 терминалов', true);
} else {
const plan = mergePlan(active, ev.clientX - r.left, ev.clientY - r.top);
showHint(plan.rect, plan.label);
drag.target = { kind: 'merge', plan };
}
drag.ghost.dataset.hint = '';
} else if (inArea && drag.kind === 'pane' && tabOf(drag.obj) === active) {
const r = active.view.getBoundingClientRect();
const over = active.panes.find(s => { const p = s.el.getBoundingClientRect(); return s !== drag.obj && ev.clientX >= p.left && ev.clientX <= p.right && ev.clientY >= p.top && ev.clientY <= p.bottom; });
if (over) {
const p = over.el.getBoundingClientRect();
showHint({ x: p.left - r.left, y: p.top - r.top, w: p.width, h: p.height }, 'поменять местами');
drag.target = { kind: 'swap', with: over };
}
drag.ghost.dataset.hint = over ? '' : 'к вкладкам - отдельной вкладкой';
} else {
drag.ghost.dataset.hint = '';
}
}
function onDragEnd(ev) {
if (!drag || ev.pointerId !== drag.id) return;
const d = drag;
drag = null;
if (!d.on) return;
d.ghost.remove();
d.src.classList.remove('dragging');
document.body.classList.remove('dnd', 'multi-hint');
hint.hidden = true; mark.hidden = true;
dragJustEnded = true;
setTimeout(() => { dragJustEnded = false; }, 0);
const tg = d.target;
if (!tg) return;
if (d.kind === 'tab' && tg.kind === 'strip') {
const t = d.obj, ref = tg.others[tg.index];
tabs.splice(tabs.indexOf(t), 1);
tabs.splice(ref ? tabs.indexOf(ref) : tabs.length, 0, t);
tablist.insertBefore(t.el, ref ? ref.el : mark);
} else if (d.kind === 'tab' && tg.kind === 'merge') {
const src = d.obj, s = src.panes[0], t = active, plan = tg.plan;
// The joining terminal starts where the hint showed it.
s.el.classList.add('instant');
s.el.style.left = plan.rect.x + 'px'; s.el.style.top = plan.rect.y + 'px';
s.el.style.width = plan.rect.w + 'px'; s.el.style.height = plan.rect.h + 'px';
t.view.appendChild(s.el);
requestAnimationFrame(() => s.el.classList.remove('instant'));
t.panes = plan.order.map(o => o === 'P' ? s : t.panes[o]);
t.layout = plan.layout;
tabs.splice(tabs.indexOf(src), 1);
src.el.classList.add('leave');
setTimeout(() => { src.el.remove(); src.view.remove(); }, 220);
setActivePane(s);
renderTab(t);
layout(t, true);
updateMode();
s.term.focus();
} else if (d.kind === 'pane' && tg.kind === 'strip') {
const s = d.obj, from = tabOf(s), ref = tg.others[tg.index];
takePane(from, s);
renderTab(from);
const t = makeTab([s], ref ? tabs.indexOf(ref) : tabs.length);
layout(from, true);
activate(t);
} else if (d.kind === 'pane' && tg.kind === 'swap') {
const t = active, a = t.panes.indexOf(d.obj), b = t.panes.indexOf(tg.with);
[t.panes[a], t.panes[b]] = [t.panes[b], t.panes[a]];
layout(t, true);
}
}
window.addEventListener('pointermove', onDragMove);
window.addEventListener('pointerup', onDragEnd);
window.addEventListener('pointercancel', onDragEnd);
// ---------- the "+" menu ----------
let agentsCache = null;
function openMenu(anchor) {
const here = (activePane && activePane.agent) || PAGE.agent;
addMenu.innerHTML = '';
const item = (html, fn, cls) => {
const b = document.createElement('button');
b.type = 'button'; b.className = 'item ' + (cls || ''); b.innerHTML = html;
b.onclick = fn;
addMenu.appendChild(b);
return b;
};
const esc = s => String(s).replace(/[&<>"]/g, c => ({ '&': '&', '<': '<', '>': '>', '"': '"' }[c]));
item('+Новый терминал здесь' + esc(here.name) + ' · ' + esc(here.user + '@' + here.host) + '',
() => { closeMenu(); openTerminal(here); });
const other = item('⇄На другой машиневыбрать из списка›', () => {
other.remove();
const list = document.createElement('div');
list.className = 'mlist';
list.innerHTML = '