tildefriends/core/client.js

446 lines
12 KiB
JavaScript
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"use strict";
var gSessionId;
var gCredentials;
var gErrorCount = 0;
var gCommandHistory = [];
var kMaxCommandHistory = 16;
function enter(event) {
if (event.keyCode == 13) {
gCommandHistory.push(document.getElementById("input").value);
if (gCommandHistory.length > kMaxCommandHistory) {
gCommandHistory.shift();
}
send();
event.preventDefault();
} else if (event.keyCode == 38) {
if (gCommandHistory.length) {
var input = document.getElementById("input");
gCommandHistory.unshift(input.value);
input.value = gCommandHistory.pop();
event.preventDefault();
}
} else if (event.keyCode == 40) {
if (gCommandHistory.length) {
var input = document.getElementById("input");
gCommandHistory.push(input.value);
input.value = gCommandHistory.shift();
event.preventDefault();
}
} else if (event.keyCode == 186
&& !event.metaKey
&& !event.altKey
&& !event.ctrlKey
&& !event.shiftKey) {
var input = document.getElementById("input");
var value = input.value;
if (value && value[value.length - 1] == '\\') {
input.value = value.substring(0, value.length - 1) + ";";
event.preventDefault();
} else {
storeTarget(value);
input.value = "";
event.preventDefault();
}
}
}
function url() {
var hash = window.location.href.indexOf('#');
var question = window.location.href.indexOf('?');
var end = -1;
if (hash != -1 && (hash < end || end == -1))
{
end = hash;
}
if (question != -1 && (question < end || end == -1))
{
end = question;
}
return end != -1 ? window.location.href.substring(0, end) : window.location.href;
}
function hash() {
return window.location.hash != "#" ? window.location.hash : "";
}
function storeTarget(target) {
document.getElementById("target").innerText = target || "";
}
function split(container, children) {
if (container) {
while (container.firstChild) {
container.removeChild(container.firstChild);
}
}
if (children) {
for (var i = 0; i < children.length; i++) {
if (children[i].name) {
var node = document.createElement("div");
node.setAttribute("id", "terminal_" + children[i].name);
var grow = children[i].grow || "1";
var shrink = children[i].shrink || "1";
var basis = children[i].basis || "auto";
node.setAttribute("style", "flex: " + grow + " " + shrink + " " + basis);
var classes = ["terminal"];
if (children[i].type == "vertical") {
classes.push("vbox");
} else if (children[i].type == "horizontal") {
classes.push("hbox");
}
node.setAttribute("class", classes.join(" "));
container.appendChild(node);
} else if (children[i].type) {
node = document.createElement("div");
if (children[i].type == "horizontal") {
node.setAttribute("class", "hbox");
} else if (children[i].type == "vertical") {
node.setAttribute("class", "vbox");
}
container.appendChild(node);
split(node, children[i].children);
}
}
}
}
function receive(data) {
for (var i in data.lines) {
var line = data.lines[i];
var target = document.getElementsByClassName("terminal")[0].id;
if (line && line.terminal) {
if (document.getElementById("terminal_" + line.terminal)) {
target = "terminal_" + line.terminal;
}
line = line.value;
}
if (line && line.action == "ping") {
gSocket.send(JSON.stringify({action: "pong"}));
} else if (line && line.action == "session") {
gSessionId = line.sessionId;
gCredentials = line.credentials;
updateLogin();
} else if (line && line[0] && line[0].action == "ready") {
if (window.location.hash) {
send({event: "hashChange", hash: window.location.hash});
}
} else if (line && line[0] && line[0].action == "notify") {
new Notification(line[0].title, line[0].options);
} else if (line && line[0] && line[0].action == "title") {
window.document.title = line[0].value;
} else if (line && line[0] && line[0].action == "prompt") {
var prompt = document.getElementById("prompt");
while (prompt.firstChild) {
prompt.removeChild(prompt.firstChild);
}
prompt.appendChild(document.createTextNode(line[0].value));
} else if (line && line[0] && line[0].action == "password") {
var prompt = document.getElementById("input");
prompt.setAttribute("type", line[0].value ? "password" : "text");
} else if (line && line[0] && line[0].action == "hash") {
window.location.hash = line[0].value;
} else if (line && line[0] && line[0].action == "update") {
document.getElementById("update").setAttribute("Style", "display: inline");
} else if (line && line[0] && line[0].action == "split") {
split(document.getElementById("terminals"), line[0].options);
} else if (line && line[0] && line[0].action == "postMessageToIframe") {
var iframe = document.getElementById("iframe_" + line[0].name);
if (iframe) {
iframe.contentWindow.postMessage(line[0].message, "*");
}
} else {
print(document.getElementById(target), line);
}
}
}
function autoNewLine(terminal) {
terminal.appendChild(document.createElement("br"));
}
function print(terminal, data) {
autoNewLine(terminal);
printStructured(terminal, data);
autoScroll(terminal);
}
function printStructured(container, data) {
if (typeof data == "string") {
container.appendChild(document.createTextNode(data));
} else if (data && data[0] !== undefined) {
for (var i in data) {
printStructured(container, data[i]);
}
} else if (data && data.action == "clear") {
while (container.firstChild) {
container.removeChild(container.firstChild);
}
} else if (data) {
var node;
if (data.href) {
node = document.createElement("a");
node.setAttribute("href", data.href);
node.setAttribute("target", "_blank");
} else if (data.iframe) {
node = document.createElement("iframe");
node.setAttribute("srcdoc", data.iframe);
node.setAttribute("sandbox", "allow-forms allow-scripts allow-top-navigation");
node.setAttribute("width", data.width || 320);
node.setAttribute("height", data.height || 240);
if (data.name) {
node.setAttribute("id", "iframe_" + data.name);
}
} else if (data.image) {
node = document.createElement("img");
node.setAttribute("src", data.image);
} else {
node = document.createElement("span");
}
if (data.style) {
node.setAttribute("style", data.style);
}
if (data.class) {
node.setAttribute("class", data.class);
}
var value = data.value || data.href || data.command || "";
if (!value && data.message && data.stackTrace) {
printStructured(node, data.message);
node.appendChild(document.createElement("br"));
printStructured(node, data.fileName + ":" + data.lineNumber + ":");
node.appendChild(document.createElement("br"));
if (data.stackTrace.length) {
for (var i = 0; i < data.stackTrace.length; i++) {
printStructured(node, data.stackTrace[i]);
node.appendChild(document.createElement("br"));
}
} else {
printStructured(node, data.sourceLine);
}
} else if (value === undefined) {
printStructured(node, JSON.stringify(value));
} else {
printStructured(node, value);
}
if (data.command) {
node.dataset.command = data.command;
node.onclick = commandClick;
node.setAttribute("class", "command");
}
container.appendChild(node);
} else {
printStructured(container, JSON.stringify(data));
}
}
function commandClick() {
send(this.dataset.command);
document.getElementById("input").focus();
}
function autoScroll(terminal) {
terminal.scrollTop = terminal.scrollHeight - terminal.clientHeight;
}
function setErrorMessage(message) {
var node = document.getElementById("status");
while (node.firstChild) {
node.removeChild(node.firstChild);
}
node.appendChild(document.createTextNode(message));
node.setAttribute("style", "display: inline; color: #dc322f");
}
function send(command) {
var value = command;
if (!command) {
var target = document.getElementById("target").innerText;
var prefix = target ? target + " " : "";
value = prefix + document.getElementById("input").value;
document.getElementById("input").value = "";
}
try {
gSocket.send(JSON.stringify({action: "command", command: value}));
} catch (error) {
setErrorMessage("Send failed: " + error.toString());
}
}
function updateLogin() {
var login = document.getElementById("login");
while (login.firstChild) {
login.removeChild(login.firstChild);
}
var a = document.createElement("a");
if (gCredentials && gCredentials.session) {
a.appendChild(document.createTextNode("logout " + gCredentials.session.name));
if (gCredentials.session.google) {
gapi.load("auth2", function() {
gapi.auth2.init();
});
a.setAttribute("onclick", "logoutGoogle()");
a.setAttribute("href", "#");
} else {
a.setAttribute("href", "/login/logout?return=" + encodeURIComponent(url() + hash()));
}
} else {
a.appendChild(document.createTextNode("login"));
a.setAttribute("href", "/login?return=" + encodeURIComponent(url() + hash()));
}
login.appendChild(a);
}
function logoutGoogle() {
gapi.auth2.getAuthInstance().signOut().then(function() {
window.location.href = "/login/logout?return=" + encodeURIComponent(url() + hash());
});
}
var gOriginalInput;
function dragHover(event) {
event.stopPropagation();
event.preventDefault();
var input = document.getElementById("input");
if (event.type == "dragover") {
if (!input.classList.contains("drop")) {
input.classList.add("drop");
gOriginalInput = input.value;
input.value = "drop file to upload";
}
} else {
input.classList.remove("drop");
input.value = gOriginalInput;
}
}
function fixImage(sourceData, maxWidth, maxHeight, callback) {
var result = sourceData;
var image = new Image();
image.crossOrigin = "anonymous";
image.referrerPolicy = "no-referrer";
image.onload = function() {
if (image.width > maxWidth || image.height > maxHeight) {
var downScale = Math.min(maxWidth / image.width, maxHeight / image.height);
var canvas = document.createElement("canvas");
canvas.width = image.width * downScale;
canvas.height = image.height * downScale;
var context = canvas.getContext("2d");
context.clearRect(0, 0, canvas.width, canvas.height);
image.width = canvas.width;
image.height = canvas.height;
context.drawImage(image, 0, 0, image.width, image.height);
result = canvas.toDataURL();
}
callback(result);
};
image.src = sourceData;
}
function sendImage(image) {
fixImage(image, 320, 240, function(result) {
send({image: result});
});
}
function fileDropRead(event) {
sendImage(event.target.result);
}
function fileDrop(event) {
dragHover(event);
var done = false;
if (!done) {
var files = event.target.files || event.dataTransfer.files;
for (var i = 0; i < files.length; i++) {
var file = files[i];
if (file.type.substring(0, "image/".length) == "image/") {
var reader = new FileReader();
reader.onloadend = fileDropRead;
reader.readAsDataURL(file);
done = true;
}
}
}
if (!done) {
var html = event.dataTransfer.getData("text/html");
var match = /<img.*src="([^"]+)"/.exec(html);
if (match) {
sendImage(match[1]);
done = true;
}
}
if (!done) {
var text = event.dataTransfer.getData("text/plain");
if (text) {
send(text);
done = true;
}
}
}
function enableDragDrop() {
var body = document.body;
body.addEventListener("dragover", dragHover);
body.addEventListener("dragleave", dragHover);
body.addEventListener("drop", fileDrop);
}
function hashChange() {
send({event: 'hashChange', hash: window.location.hash});
}
function focus() {
send({event: "focus"});
}
function blur() {
send({event: "blur"});
}
function onMessage(event) {
send({event: "onWindowMessage", message: event.data});
}
var gSocket;
window.addEventListener("load", function() {
if (Notification) {
Notification.requestPermission();
}
var input = document.getElementById("input");
input.addEventListener("keydown", enter);
input.focus();
window.addEventListener("hashchange", hashChange);
window.addEventListener("focus", focus);
window.addEventListener("blur", blur);
window.addEventListener("message", onMessage, false);
enableDragDrop();
gSocket = new WebSocket(
(window.location.protocol == "https:" ? "wss://" : "ws://")
+ window.location.hostname
+ (window.location.port.length ? ":" + window.location.port : "")
+ "/terminal/socket");
gSocket.onopen = function() {
gSocket.send(JSON.stringify({
action: "hello",
path: window.location.pathname,
}));
}
gSocket.onmessage = function(event) {
receive(JSON.parse(event.data));
}
gSocket.onclose = function(event) {
setErrorMessage("Connection closed with code " + event.code);
}
});