355 lines
10 KiB
JavaScript
355 lines
10 KiB
JavaScript
/*global ot */
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ot.EditorClient = (function () {
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'use strict';
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var Client = ot.Client;
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var Selection = ot.Selection;
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var UndoManager = ot.UndoManager;
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var TextOperation = ot.TextOperation;
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var WrappedOperation = ot.WrappedOperation;
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function SelfMeta (selectionBefore, selectionAfter) {
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this.selectionBefore = selectionBefore;
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this.selectionAfter = selectionAfter;
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}
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SelfMeta.prototype.invert = function () {
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return new SelfMeta(this.selectionAfter, this.selectionBefore);
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};
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SelfMeta.prototype.compose = function (other) {
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return new SelfMeta(this.selectionBefore, other.selectionAfter);
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};
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SelfMeta.prototype.transform = function (operation) {
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return new SelfMeta(
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(this.selectionBefore ? this.selectionBefore.transform(operation) : null),
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(this.selectionAfter ? this.selectionAfter.transform(operation) : null)
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);
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};
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function OtherMeta (clientId, selection) {
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this.clientId = clientId;
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this.selection = selection;
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}
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OtherMeta.fromJSON = function (obj) {
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return new OtherMeta(
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obj.clientId,
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obj.selection && Selection.fromJSON(obj.selection)
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);
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};
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OtherMeta.prototype.transform = function (operation) {
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return new OtherMeta(
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this.clientId,
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this.selection && this.selection.transform(operation)
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);
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};
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function OtherClient (id, listEl, editorAdapter, name, color, selection) {
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this.id = id;
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this.listEl = listEl;
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this.editorAdapter = editorAdapter;
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this.name = name;
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this.color = color;
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this.li = document.createElement('li');
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if (name) {
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this.li.textContent = name;
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this.listEl.appendChild(this.li);
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}
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if(!color)
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this.setColor(name ? hueFromName(name) : Math.random());
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else
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this.setForceColor(color);
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if (selection) { this.updateSelection(selection); }
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}
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OtherClient.prototype.setColor = function (hue) {
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this.hue = hue;
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this.color = hsl2hex(hue, 0.75, 0.5);
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this.lightColor = hsl2hex(hue, 0.5, 0.9);
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if (this.li) { this.li.style.color = this.color; }
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};
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OtherClient.prototype.setForceColor = function (color) {
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this.hue = null;
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this.color = color;
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this.lightColor = color;
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if (this.li) { this.li.style.color = this.color; }
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};
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OtherClient.prototype.setName = function (name) {
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if (this.name === name) { return; }
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this.name = name;
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this.li.textContent = name;
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if (!this.li.parentNode) {
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this.listEl.appendChild(this.li);
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}
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this.setColor(hueFromName(name));
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};
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OtherClient.prototype.updateSelection = function (selection) {
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this.removeSelection();
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this.selection = selection;
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this.mark = this.editorAdapter.setOtherSelection(
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selection,
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selection.position === selection.selectionEnd ? this.color : this.lightColor,
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this.id
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);
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};
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OtherClient.prototype.remove = function () {
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if (this.li) { removeElement(this.li); }
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this.removeSelection();
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};
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OtherClient.prototype.removeSelection = function () {
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if (this.mark) {
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this.mark.clear();
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this.mark = null;
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}
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};
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function EditorClient (revision, clients, serverAdapter, editorAdapter) {
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Client.call(this, revision);
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this.serverAdapter = serverAdapter;
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this.editorAdapter = editorAdapter;
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this.undoManager = new UndoManager();
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this.initializeClientList();
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this.initializeClients(clients);
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var self = this;
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this.editorAdapter.registerCallbacks({
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change: function (operation, inverse) { self.onChange(operation, inverse); },
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selectionChange: function () { self.onSelectionChange(); },
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blur: function () { self.onBlur(); }
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});
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this.editorAdapter.registerUndo(function () { self.undo(); });
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this.editorAdapter.registerRedo(function () { self.redo(); });
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this.serverAdapter.registerCallbacks({
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client_left: function (clientId) { self.onClientLeft(clientId); },
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set_name: function (clientId, name) { self.getClientObject(clientId).setName(name); },
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set_color: function (clientId, color) { self.getClientObject(clientId).setForceColor(color); },
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ack: function (revision) { self.serverAck(revision); },
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operation: function (revision, operation) {
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self.applyServer(revision, TextOperation.fromJSON(operation));
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},
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operations: function (head, operations) {
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self.applyOperations(head, operations);
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},
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selection: function (clientId, selection) {
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if (selection) {
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self.getClientObject(clientId).updateSelection(
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self.transformSelection(Selection.fromJSON(selection))
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);
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} else {
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self.getClientObject(clientId).removeSelection();
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}
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},
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clients: function (clients) {
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var clientId;
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for (clientId in self.clients) {
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if (self.clients.hasOwnProperty(clientId) && !clients.hasOwnProperty(clientId)) {
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self.onClientLeft(clientId);
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}
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}
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for (clientId in clients) {
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if (clients.hasOwnProperty(clientId)) {
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var clientObject = self.getClientObject(clientId);
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if (clients[clientId].name) {
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clientObject.setName(clients[clientId].name);
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}
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var selection = clients[clientId].selection;
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if (selection) {
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self.clients[clientId].updateSelection(
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self.transformSelection(Selection.fromJSON(selection))
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);
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} else {
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self.clients[clientId].removeSelection();
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}
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}
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}
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},
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reconnect: function () { self.serverReconnect(); }
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});
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}
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inherit(EditorClient, Client);
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EditorClient.prototype.addClient = function (clientId, clientObj) {
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this.clients[clientId] = new OtherClient(
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clientId,
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this.clientListEl,
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this.editorAdapter,
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clientObj.name || clientId,
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clientObj.color || null,
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clientObj.selection ? Selection.fromJSON(clientObj.selection) : null
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);
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};
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EditorClient.prototype.initializeClients = function (clients) {
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this.clients = {};
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for (var clientId in clients) {
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if (clients.hasOwnProperty(clientId)) {
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this.addClient(clientId, clients[clientId]);
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}
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}
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};
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EditorClient.prototype.getClientObject = function (clientId) {
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var client = this.clients[clientId];
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if (client) { return client; }
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return this.clients[clientId] = new OtherClient(
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clientId,
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this.clientListEl,
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this.editorAdapter
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);
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};
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EditorClient.prototype.onClientLeft = function (clientId) {
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//console.log("User disconnected: " + clientId);
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var client = this.clients[clientId];
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if (!client) { return; }
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client.remove();
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delete this.clients[clientId];
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};
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EditorClient.prototype.initializeClientList = function () {
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this.clientListEl = document.createElement('ul');
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};
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EditorClient.prototype.applyUnredo = function (operation) {
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this.undoManager.add(operation.invert(this.editorAdapter.getValue()));
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this.editorAdapter.applyOperation(operation.wrapped);
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this.selection = operation.meta.selectionAfter;
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this.editorAdapter.setSelection(this.selection);
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this.applyClient(operation.wrapped);
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};
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EditorClient.prototype.undo = function () {
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var self = this;
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if (!this.undoManager.canUndo()) { return; }
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this.undoManager.performUndo(function (o) { self.applyUnredo(o); });
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};
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EditorClient.prototype.redo = function () {
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var self = this;
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if (!this.undoManager.canRedo()) { return; }
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this.undoManager.performRedo(function (o) { self.applyUnredo(o); });
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};
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EditorClient.prototype.onChange = function (textOperation, inverse) {
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var selectionBefore = this.selection;
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this.updateSelection();
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var meta = new SelfMeta(selectionBefore, this.selection);
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var operation = new WrappedOperation(textOperation, meta);
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var compose = this.undoManager.undoStack.length > 0 &&
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inverse.shouldBeComposedWithInverted(last(this.undoManager.undoStack).wrapped);
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var inverseMeta = new SelfMeta(this.selection, selectionBefore);
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this.undoManager.add(new WrappedOperation(inverse, inverseMeta), compose);
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this.applyClient(textOperation);
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};
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EditorClient.prototype.updateSelection = function () {
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this.selection = this.editorAdapter.getSelection();
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};
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EditorClient.prototype.onSelectionChange = function () {
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var oldSelection = this.selection;
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this.updateSelection();
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if (oldSelection && this.selection.equals(oldSelection)) { return; }
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this.sendSelection(this.selection);
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};
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EditorClient.prototype.onBlur = function () {
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this.selection = null;
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this.sendSelection(null);
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};
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EditorClient.prototype.sendSelection = function (selection) {
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if (this.state instanceof Client.AwaitingWithBuffer) { return; }
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this.serverAdapter.sendSelection(selection);
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};
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EditorClient.prototype.sendOperation = function (revision, operation) {
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this.serverAdapter.sendOperation(revision, operation.toJSON(), this.selection);
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};
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EditorClient.prototype.getOperations = function (base, head) {
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this.serverAdapter.getOperations(base, head);
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};
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EditorClient.prototype.applyOperation = function (operation) {
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this.editorAdapter.applyOperation(operation);
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this.updateSelection();
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this.undoManager.transform(new WrappedOperation(operation, null));
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};
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function rgb2hex (r, g, b) {
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function digits (n) {
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var m = Math.round(255*n).toString(16);
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return m.length === 1 ? '0'+m : m;
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}
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return '#' + digits(r) + digits(g) + digits(b);
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}
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function hsl2hex (h, s, l) {
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if (s === 0) { return rgb2hex(l, l, l); }
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var var2 = l < 0.5 ? l * (1+s) : (l+s) - (s*l);
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var var1 = 2 * l - var2;
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var hue2rgb = function (hue) {
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if (hue < 0) { hue += 1; }
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if (hue > 1) { hue -= 1; }
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if (6*hue < 1) { return var1 + (var2-var1)*6*hue; }
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if (2*hue < 1) { return var2; }
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if (3*hue < 2) { return var1 + (var2-var1)*6*(2/3 - hue); }
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return var1;
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};
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return rgb2hex(hue2rgb(h+1/3), hue2rgb(h), hue2rgb(h-1/3));
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}
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function hueFromName (name) {
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var a = 1;
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for (var i = 0; i < name.length; i++) {
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a = 17 * (a+name.charCodeAt(i)) % 360;
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}
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return a/360;
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}
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// Set Const.prototype.__proto__ to Super.prototype
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function inherit (Const, Super) {
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function F () {}
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F.prototype = Super.prototype;
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Const.prototype = new F();
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Const.prototype.constructor = Const;
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}
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function last (arr) { return arr[arr.length - 1]; }
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// Remove an element from the DOM.
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function removeElement (el) {
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if (el.parentNode) {
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el.parentNode.removeChild(el);
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}
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}
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return EditorClient;
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}());
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