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[web] Connect to server

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The individual components are more-or-less working, but the code that glues them
together is still pretty ugly. I should probably revisit and clean up the
individual components too. Also, the cursor code is missing a few features, but
everything is usable for the first time :D
This commit is contained in:
Joscha 2020-03-18 18:08:04 +00:00
parent 78235ef7cf
commit 54795b81ac
2 changed files with 124 additions and 32 deletions
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144
forest-web/node.js
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@ -349,6 +349,7 @@ class Editor {
this.nodeTree = nodeTree;
this.textarea = newElement("textarea");
this.element = newElement("div", "node-editor", this.textarea);
this.textarea.addEventListener("input", event => this._updateTextAreaHeight());
this.path = undefined;
@ -370,21 +371,22 @@ class Editor {
node.elements.main.classList.remove("has-editor");
}
this.textarea.parentNode.removeChild(this.textarea);
this.element.parentNode.removeChild(this.element);
}
_attachTo(node, asChild) {
if (asChild) {
node.elements.children.appendChild(this.textarea);
node.elements.children.appendChild(this.element);
node.setFolded(false);
} else {
node.elements.main.classList.add("has-editor");
node.elements.main.insertBefore(this.textarea, node.elements.children);
node.elements.main.insertBefore(this.element, node.elements.children);
}
this._updateTextAreaHeight();
}
restore() {
if (this.textarea.parentNode !== null) return; // Already attached
if (this.element.parentNode !== null) return; // Already attached
let node = this._getAttachedNode();
if (node === undefined) return; // Nowhere to attach
this._attachTo(node, this.asChild);
@ -417,6 +419,64 @@ class Editor {
}
}
class Connection {
constructor(nodeTree, cursor, editor, url) {
this.nodeTree = nodeTree;
this.cursor = cursor;
this.editor = editor;
this.url = url;
this.ws = new WebSocket(this.url);
this.ws.addEventListener("message", msg => this.onMessage(msg));
this.ws.addEventListener("open", _ => this.sendHello());
}
onMessage(msg) {
let content = JSON.parse(msg.data);
if (content.type === "hello") {
this.onHello(content);
} else if (content.type === "update") {
this.onUpdate(content);
}
}
onHello(content) {
this.nodeTree.updateAt(new Path(), new Node(content.node));
this.cursor.restore();
this.editor.restore();
}
onUpdate(content) {
this.nodeTree.updateAt(new Path(...content.path), new Node(content.node));
this.cursor.restore();
this.editor.restore();
}
_send(thing) {
this.ws.send(JSON.stringify(thing));
}
sendHello() {
this._send({type: "hello", extensions: []});
}
sendEdit(path, text) {
this._send({type: "edit", path: path.elements, text: text});
}
sendDelete(path) {
this._send({type: "delete", path: path.elements});
}
sendReply(path, text) {
this._send({type: "reply", path: path.elements, text: text});
}
sendAct(path) {
this._send({type: "act", path: path.elements});
}
}
/*
* The main application
*/
@ -426,29 +486,48 @@ const loadingNode = new Node({text: "Connecting...", children: {}, order: []});
const nodeTree = new NodeTree(rootNodeContainer, loadingNode);
const cursor = new Cursor(nodeTree);
const editor = new Editor(nodeTree);
const conn = new Connection(nodeTree, cursor, editor, "ws://127.0.0.1:8080/");
// TODO Replace this testing node with the real websocket code
const testNode = new Node({text: "Forest", children: [
{text: "Test", children: [
{text: "Bla", children: [], order: []},
], order: [0]},
{text: "Sandbox", edit: true, delete: true, reply: true, act: true, children: [], order: []},
{text: "About", children: [
{text: "This project is an experiment in tree-based interaction.", children: [], order: []},
{text: "Motivation", children: [], order: []},
{text: "Inspirations", children: [], order: []},
], order: [0, 1, 2]}
], order: [0, 1, 2]});
nodeTree.updateAt(new Path(), testNode);
function beginEdit() {
let node = cursor.getSelectedNode();
editor.content = node.text;
editor.attachTo(cursor.path, false);
}
function beginDirectReply() {
editor.content = "";
editor.attachTo(cursor.path, true);
}
function beginIndirectReply() {
let path = cursor.path.parent;
if (path === undefined) return;
editor.content = "";
editor.attachTo(path, true);
}
function cancelEdit() {
editor.detach();
}
function completeEdit() {
let path = editor.path;
let text = editor.textarea.value;
if (editor.asChild) {
conn.sendReply(path, text);
} else {
conn.sendEdit(path, text);
}
editor.detach();
}
document.addEventListener("keydown", event => {
console.log(event);
if (event.code === "Escape") {
editor.detach();
} else if (document.activeElement === editor.textarea) {
if (event.code === "Enter" && !event.shiftKey) {
editor.detach();
}
cancelEdit();
event.preventDefault();
} else if (event.code === "Enter" && !event.shiftKey) {
completeEdit();
event.preventDefault();
} else if (document.activeElement.tagName === "TEXTAREA") {
return; // Do nothing special
} else if (event.code === "Tab") {
@ -461,9 +540,22 @@ document.addEventListener("keydown", event => {
cursor.moveDown();
event.preventDefault();
} else if (event.code === "KeyE") {
let node = cursor.getSelectedNode();
editor.content = node.text;
editor.attachTo(cursor.path, false);
beginEdit();
event.preventDefault();
} else if (event.code === "KeyR") {
if (event.shiftKey) {
console.log("indirect");
beginIndirectReply();
} else {
console.log("direct");
beginDirectReply();
}
event.preventDefault();
} else if (event.code === "KeyD") {
conn.sendDelete(cursor.path);
event.preventDefault();
} else if (event.code === "KeyA") {
conn.sendAct(cursor.path);
event.preventDefault();
}
});