mirror of
https://github.com/xevidos/codiad.git
synced 2024-09-21 10:21:32 +02:00
647 lines
26 KiB
JavaScript
Executable File
647 lines
26 KiB
JavaScript
Executable File
/*
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* Copyright (c) Codiad (codiad.com) & Florent Galland & Luc Verdier,
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* distributed as-is and without warranty under the MIT License. See
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* [root]/license.txt for more. This information must remain intact.
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*/
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(function (global, $) {
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var codiad = global.codiad,
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scripts= document.getElementsByTagName('script'),
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path = scripts[scripts.length-1].src.split('?')[0],
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curpath = path.split('/').slice(0, -1).join('/')+'/';
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/* FIXME Dynamically load diff match patch lib. Is there any better way? */
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$.getScript('lib/diff_match_patch.js');
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var codiad = global.codiad;
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$(function () {
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if (typeof(codiad.collaborative) == 'undefined') {
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codiad.collab.init();
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} else {
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codiad.modal.load(400, curpath+"dialog.php?action=warn");
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}
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});
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//////////////////////////////////////////////////////////////////
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//
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// Collaborative Component for Codiad
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// ---------------------------------
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// Displays in real time the selection position and
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// the changes when concurrently editing files.
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//
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//////////////////////////////////////////////////////////////////
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codiad.collab = {
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controller: curpath + 'controller.php',
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/* The filename of the file to wich we are currently registered as a
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* collaborator. Might be null if we are not collaborating to any file. */
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currentFilename: null,
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/* Store the text shadows for every edited files.
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* {'filename': shadowString, ... } */
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shadows: {},
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/* Store the currently displayed usernames and their corresponding
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* current selection.
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* [username: {start: {row: 12, column: 14}, end: {row: 14, column: 19}}, ... ] */
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displayedSelections: [],
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/* Time interval in milisecond to send an heartbeat to the server. */
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heartbeatInterval: 5000,
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/* Status of the collaboration logic. */
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enableCollaboration: false,
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init: function () {
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var _this = this;
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/* Make sure to start clean by unregistering from any file first. */
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this.unregisterAsCollaboratorFromAllFiles();
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this.removeSelectionAndChangesForAllFiles();
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/* TODO For debug only, remove this for production. */
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//this.removeServerTextForAllFiles();
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this.$onSelectionChange = this.onSelectionChange.bind(this);
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this.$onChange = this.onChange.bind(this);
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this.$postSelectionChange = this.postSelectionChange.bind(this);
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this.$updateCollaboratorsSelections = this.updateCollaboratorsSelections.bind(this);
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this.$displaySelections = this.displaySelections.bind(this);
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this.$synchronizeText = this.synchronizeText.bind(this);
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this.$postSynchronizeText = this.postSynchronizeText.bind(this);
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this.$sendHeartbeat = this.sendHeartbeat.bind(this);
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/* Subscribe to know when a file is being closed. */
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amplify.subscribe('active.onClose', function (path) {
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if (_this.currentFilename === path) {
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_this.unregisterAsCollaboratorOfCurrentFile();
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_this.removeAllSelections();
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}
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});
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/* Subscribe to know when a file become active. */
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amplify.subscribe('active.onFocus', function (path) {
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_this.unregisterAsCollaboratorOfCurrentFile();
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_this.registerAsCollaboratorOfActiveFile();
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/* Create the initial shadow for the current file. */
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_this.shadows[_this.currentFilename] = _this._getCurrentFileText();
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_this.sendAsShadow(_this.currentFilename, _this.shadows[_this.currentFilename]);
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_this.addListeners();
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});
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/* Start to send an heartbeat to notify the server that we are
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* alive. */
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setInterval(this.$sendHeartbeat, this.heartbeatInterval);
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/* Start the collaboration logic. */
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this.setCollaborationStatus(true);
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$(".collaborative-selection,.collaborative-selection-tooltip").live({
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mouseenter: function () {
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var markup = $(this).parent();
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_this.showTooltipForMarkup(markup);
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},
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mouseleave: function () {
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var markup = $(this).parent();
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_this.showTooltipForMarkup(markup, 500);
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}
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});
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},
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/* Start or stop the collaboration logic. */
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setCollaborationStatus: function (enableCollaboration) {
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/* Some static variables to hold the setInterval reference. */
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if (typeof this.setCollaborationStatus.updateSelectionsIntervalRef === 'undefined') {
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this.setCollaborationStatus.updateSelectionsIntervalRef = null;
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}
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if (typeof this.setCollaborationStatus.synchronizeTextIntervalRef === 'undefined') {
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this.setCollaborationStatus.synchronizeTextIntervalRef = null;
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}
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if (enableCollaboration && !this.enableCollaboration) {
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console.log('Starting collaboration logic.');
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this.enableCollaboration = true;
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/* Start to ask periodically for the potential other collaborators
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* selection. */
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this.setCollaborationStatus.updateSelectionsIntervalRef =
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setInterval(this.$updateCollaboratorsSelections, 500);
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/* Start to ask periodically for the potential other collaborators
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* changes. */
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this.setCollaborationStatus.synchronizeTextIntervalRef =
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setInterval(this.$synchronizeText, 500);
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/* Sync right away for responsiveness - there's often already a
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* server copy of the collab file */
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this.$synchronizeText();
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} else if (!enableCollaboration && this.enableCollaboration) {
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console.log('Stopping collaboration logic.');
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this.enableCollaboration = false;
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clearInterval(this.setCollaborationStatus.updateSelectionsIntervalRef);
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clearInterval(this.setCollaborationStatus.synchronizeTextIntervalRef);
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this.removeAllSelections();
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}
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},
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removeSelectionAndChangesForAllFiles: function () {
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$.post(this.controller,
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{ action: 'removeSelectionAndChangesForAllFiles' },
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function (data) {
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// console.log('complete unregistering from all');
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// console.log(data);
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codiad.jsend.parse(data);
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});
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},
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removeServerTextForAllFiles: function () {
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$.post(this.controller,
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{ action: 'removeServerTextForAllFiles' },
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function (data) {
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// console.log('complete unregistering from all');
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// console.log(data);
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codiad.jsend.parse(data);
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});
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},
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unregisterAsCollaboratorFromAllFiles: function () {
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$.post(this.controller,
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{ action: 'unregisterFromAllFiles' },
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function (data) {
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// console.log('complete unregistering from all');
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// console.log(data);
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codiad.jsend.parse(data);
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});
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},
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registerAsCollaboratorOfActiveFile: function () {
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var filename = codiad.active.getPath();
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this.currentFilename = filename;
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$.post(this.controller,
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{ action: 'registerToFile', filename: filename },
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function (data) {
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// console.log('complete registering');
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// console.log(data);
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codiad.jsend.parse(data);
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});
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},
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unregisterAsCollaboratorOfCurrentFile: function () {
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// console.log('unregister ' + this.currentFilename);
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if (this.currentFilename !== null) {
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$.post(this.controller,
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{ action: 'unregisterFromFile', filename: this.currentFilename },
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function (data) {
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// console.log('complete unregistering');
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// console.log(data);
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codiad.jsend.parse(data);
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});
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this.currentFilename = null;
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}
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},
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sendHeartbeat: function () {
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var _this = this;
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$.post(this.controller,
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{ action: 'sendHeartbeat' },
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function (data) {
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/* The data returned by the server contains the number
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* of connected collaborators. */
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data = codiad.jsend.parse(data);
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if (data.collaboratorCount > 1) {
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/* Someone else is connected, start the
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* collaboration logic. */
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_this.setCollaborationStatus(true);
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} else {
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/* We are the only conected user, stop the
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* collaboration logic. */
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_this.setCollaborationStatus(false);
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}
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});
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},
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/* Add appropriate listeners to the current EditSession. */
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addListeners: function () {
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this.addListenerToOnSelectionChange();
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this.addListenerToOnChange();
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},
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/* Remove listeners from the current EditSession. */
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removeListeners: function () {
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this.removeListenerToOnSelectionChange();
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this.removeListenerToOnChange();
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},
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addListenerToOnSelectionChange: function () {
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var selection = this._getSelection();
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selection.addEventListener('changeCursor', this.$onSelectionChange);
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selection.addEventListener('changeSelection', this.$onSelectionChange);
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},
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removeListenerToOnSelectionChange: function () {
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var selection = this._getSelection();
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selection.removeEventListener('changeCursor', this.$onSelectionChange);
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selection.removeEventListener('changeSelection', this.$onSelectionChange);
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},
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addListenerToOnChange: function () {
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var editor = this._getEditor();
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editor.addEventListener('change', this.$onChange);
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},
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removeListenerToOnChange: function () {
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var editor = this._getEditor();
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editor.removeEventListener('change', this.$onChange);
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},
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onChange: function(e) {
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this.$synchronizeText();
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},
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/* Throttling mechanism for postSelectionChange */
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onSelectionChange: function (e) {
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var minInterval = 250;
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var now = new Date().getTime();
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if (typeof(this.onSelectionChange.lastSelectionChange) === 'undefined') {
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this.onSelectionChange.lastSelectionChange = now;
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}
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var interval = now - this.onSelectionChange.lastSelectionChange;
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this.onSelectionChange.lastSelectionChange = now;
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if (interval < minInterval) {
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var intervalDifference = minInterval - interval;
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clearTimeout(this.onSelectionChange.deferredPost);
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this.onSelectionChange.deferredPost = setTimeout(this.$postSelectionChange, intervalDifference);
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}
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else {
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this.$postSelectionChange();
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}
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},
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postSelectionChange: function () {
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var post = { action: 'sendSelectionChange',
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filename: codiad.active.getPath(),
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selection: JSON.stringify(this._getSelection().getRange()) };
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$.post(this.controller, post, function (data) {
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// console.log('complete selection change');
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// console.log(data);
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codiad.jsend.parse(data);
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});
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},
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/* Request the server for the collaborators selections for the current
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* file. */
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updateCollaboratorsSelections: function () {
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var _this = this;
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if (this.currentFilename !== null) {
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$.post(this.controller,
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{ action: 'getUsersAndSelectionsForFile', filename: this.currentFilename },
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function (data) {
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// console.log('complete getUsersAndSelectionsForFile');
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// console.log(data);
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var selections = codiad.jsend.parse(data);
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_this.$displaySelections(selections);
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/* The server returned the selections for the
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* currently active users. If a user which is no
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* more active has a visible selection, remove it. */
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if (_this.displayedSelections !== null) {
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for (var username in _this.displayedSelections) {
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if (_this.displayedSelections.hasOwnProperty(username)) {
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if (selections === null || !(username in selections)) {
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_this.removeSelection(username);
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}
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}
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}
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}
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_this.displayedSelections = selections;
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});
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}
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},
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/* Displays a selection in the current file for the given user.
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* The expected selection object is compatible with what is returned
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* from the getUsersAndSelectionsForFile action on the server
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* controller.
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* Selection object example:
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* {username: {start: {row: 12, column: 14}, end: {row: 14, column: 19}}} */
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displaySelections: function (selections) {
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// console.log('displaySelection');
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for (var username in selections) {
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if (selections.hasOwnProperty(username)) {
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var markup = $('#selection-' + username);
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if (markup.length === 0) {
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/* The markup for the selection of this user does not
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* exist yet. Append it to the dom. */
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markup = $(this.getSelectionMarkupForUser(username));
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$('body').append(markup);
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}
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var screenCoordinates = this._getEditor().renderer
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.textToScreenCoordinates(selections[username].selection.start.row,
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selections[username].selection.start.column);
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/* Check if the selection has changed. */
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if (markup.css('left').slice(0, -2) !== String(screenCoordinates.pageX) ||
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markup.css('top').slice(0, -2) !== String(screenCoordinates.pageY)) {
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markup.css({
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left: screenCoordinates.pageX,
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top: screenCoordinates.pageY
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});
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markup.children('.collaborative-selection').css('background-color', selections[username].color);
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markup.children('.collaborative-selection-tooltip').css('background-color', selections[username].color);
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this.showTooltipForMarkup(markup, 2000);
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}
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}
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}
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},
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/* Show the tooltip of the given markup. If duration is defined,
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* the tooltip is automaticaly hidden when the time is elapsed. */
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showTooltipForMarkup: function (markup, duration) {
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var timeoutRef = markup.attr('hideTooltipTimeoutRef');
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if (timeoutRef !== undefined) {
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clearTimeout(timeoutRef);
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markup.removeAttr('hideTooltipTimeoutRef');
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}
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markup.children('.collaborative-selection-tooltip').fadeIn('fast');
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if (duration !== undefined) {
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timeoutRef = setTimeout(this._hideTooltipAndRemoveAttrForBoundMarkup.bind(markup), duration);
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markup.attr('hideTooltipTimeoutRef', timeoutRef);
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}
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},
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/* This function must be bound with the markup which contains
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* the tooltip to hide. */
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_hideTooltipAndRemoveAttrForBoundMarkup: function () {
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this.children('.collaborative-selection-tooltip').fadeOut('fast');
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this.removeAttr('hideTooltipTimeoutRef');
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},
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/* Remove the selection corresponding to the given username. */
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removeSelection: function (username) {
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console.log('remove ' + username);
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$('#selection-' + username).remove();
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delete this.displayedSelections[username];
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},
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/* Remove all the visible selections. */
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removeAllSelections: function () {
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if (this.displayedSelections !== null) {
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for (var username in this.displayedSelections) {
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if (this.displayedSelections.hasOwnProperty(username)) {
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this.removeSelection(username);
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}
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}
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}
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},
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/* Throttling mechanism for postSynchronizeText */
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synchronizeText: function () {
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var _this = this;
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var now = new Date().getTime();
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var minInterval = 350;
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if (typeof(this.synchronizeText.lastRun) === 'undefined') {
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this.synchronizeText.lastRun = now;
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}
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var interval = now - this.synchronizeText.lastRun;
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var _this = this;
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var successCallback = function() {
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_this.synchronizeText.lastRun = now;
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_this.$postSynchronizeText();
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};
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clearTimeout(this.synchronizeText.deferredPost);
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if (interval < minInterval) {
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var intervalDifference = minInterval - interval;
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this.synchronizeText.deferredPost = setTimeout(successCallback, intervalDifference);
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}
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else {
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successCallback();
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}
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},
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/* Make a diff of the current file text with the shadow and send it to
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* the server. */
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postSynchronizeText: function () {
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var _this = this;
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var currentFilename = this.currentFilename;
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/* Do not send any request if no file is focused. */
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if (currentFilename === null) {
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return;
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}
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/* Save the current text state, because it can be modified by the
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* user on the UI thread. */
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var currentText = this._getCurrentFileText();
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/* Make a diff between the current text and the previously saved
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* shadow. */
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codiad.workerManager.addTask({
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taskType: 'diff',
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id: 'collaborative_' + currentFilename,
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original: _this.shadows[currentFilename],
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changed: currentText
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}, function (success, patch) {
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if (success) {
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/* Send our edits to the server, and get in response a
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* patch of the edits in the server text. */
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// console.log(patch);
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_this.shadows[currentFilename] = currentText;
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var post = { action: 'synchronizeText',
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filename: currentFilename,
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patch: patch };
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// console.log(post);
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$.post(this.controller, post, function (data) {
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// console.log('complete synchronizeText');
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// console.log(data);
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var patchFromServer = codiad.jsend.parse(data);
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if (patchFromServer === 'error') { return; }
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// console.log(patchFromServer);
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/* Apply the patch from the server text to the shadow
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* and the current text. */
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var dmp = new diff_match_patch();
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var patchedShadow = dmp.patch_apply(dmp.patch_fromText(patchFromServer), _this.shadows[currentFilename]);
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// console.log(patchedShadow);
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_this.shadows[currentFilename] = patchedShadow[0];
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/* Update the current text. */
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currentText = _this._getCurrentFileText();
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var patchedCurrentText = dmp.patch_apply(dmp.patch_fromText(patchFromServer), currentText)[0];
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var diff = dmp.diff_main(currentText, patchedCurrentText);
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var deltas = _this.diffToAceDeltas(diff, currentText);
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_this._getDocument().applyDeltas(deltas);
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});
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} else {
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console.log('problem diffing');
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console.log(patch);
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}
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}, this);
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},
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/* Send the string 'shadow' as server shadow for 'filename'. */
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sendAsShadow: function (filename, shadow) {
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$.post(this.controller,
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{ action: 'sendShadow',
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filename: filename,
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shadow: shadow },
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function (data) {
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// console.log('complete sendShadow');
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// console.log(data);
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codiad.jsend.parse(data);
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});
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},
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/* Helper method that return a Ace editor delta change from a
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* diff_match_patch diff object and the original text that was
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* used to compute the diff. */
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diffToAceDeltas: function (diff, originalText) {
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var dmp = new diff_match_patch();
|
|
var deltas = dmp.diff_toDelta(diff).split('\t');
|
|
|
|
/*
|
|
* Code deeply inspired by chaoscollective / Space_Editor
|
|
*/
|
|
var offset = 0;
|
|
var row = 1;
|
|
var col = 1;
|
|
var aceDeltas = [];
|
|
var aceDelta = {};
|
|
for (var i = 0; i < deltas.length; ++i) {
|
|
var type = deltas[i].charAt(0);
|
|
var data = decodeURI(deltas[i].substring(1));
|
|
|
|
switch (type) {
|
|
case "=":
|
|
/* The new text is equal to the original text for a
|
|
* number of characters. */
|
|
var unchangedCharactersCount = parseInt(data, 10);
|
|
for (var j = 0; j < unchangedCharactersCount; ++j) {
|
|
if (originalText.charAt(offset + j) == "\n") {
|
|
++row;
|
|
col = 1;
|
|
} else {
|
|
col++;
|
|
}
|
|
}
|
|
offset += unchangedCharactersCount;
|
|
break;
|
|
|
|
case "+":
|
|
/* Some characters were added. */
|
|
var startRow = row;
|
|
var startCol = col;
|
|
|
|
var innerRows = data.split("\n");
|
|
var innerRowsCount = innerRows.length - 1;
|
|
row += innerRowsCount;
|
|
if (innerRowsCount <= 0) {
|
|
col += data.length;
|
|
} else {
|
|
col = innerRows[innerRowsCount].length + 1;
|
|
}
|
|
|
|
aceDelta = {
|
|
action: "insert",
|
|
start: {row: (startRow - 1), column: (startCol - 1)},
|
|
end: {row: (row - 1), column: (col - 1)},
|
|
lines: innerRows
|
|
};
|
|
aceDeltas.push(aceDelta);
|
|
break;
|
|
|
|
case "-":
|
|
/* Some characters were subtracted. */
|
|
var deletedCharactersCount = parseInt(data, 10);
|
|
var removedData = originalText.substring(offset, offset + deletedCharactersCount);
|
|
|
|
var removedRows = removedData.split("\n");
|
|
var removedRowsCount = removedRows.length - 1;
|
|
|
|
var endRow = row + removedRowsCount;
|
|
var endCol = col;
|
|
if (removedRowsCount <= 0) {
|
|
endCol = col + deletedCharactersCount;
|
|
} else {
|
|
endCol = removedRows[removedRowsCount].length + 1;
|
|
}
|
|
|
|
aceDelta = {
|
|
action: "remove",
|
|
start: {row: (row - 1), column: (col - 1)},
|
|
end: {row: (endRow - 1), column: (endCol - 1)},
|
|
lines: removedRows
|
|
};
|
|
aceDeltas.push(aceDelta);
|
|
|
|
offset += deletedCharactersCount;
|
|
break;
|
|
|
|
default:
|
|
/* Return an innofensive empty list of Ace deltas. */
|
|
console.log("Unhandled case '" + type + "' while building Ace deltas.");
|
|
return [];
|
|
}
|
|
}
|
|
return aceDeltas;
|
|
},
|
|
|
|
getSelectionMarkupForUser: function (username) {
|
|
return '<div id="selection-' + username + '" class="collaborative-selection-wrapper">' +
|
|
'<div class="collaborative-selection"></div>' +
|
|
'<div class="collaborative-selection-tooltip">' + username + '</div>' +
|
|
'</div>';
|
|
},
|
|
|
|
/* Set of helper methods to manipulate the editor. */
|
|
_getEditor: function () {
|
|
return codiad.editor.getActive();
|
|
},
|
|
|
|
_getEditSession: function () {
|
|
return codiad.editor.getActive().getSession();
|
|
},
|
|
|
|
_getSelection: function () {
|
|
return codiad.editor.getActive().getSelection();
|
|
},
|
|
|
|
_getDocument: function () {
|
|
return codiad.editor.getActive().getSession().getDocument();
|
|
},
|
|
|
|
_getCurrentFileText: function () {
|
|
return codiad.editor.getActive().getSession().getValue();
|
|
}
|
|
|
|
|
|
};
|
|
|
|
})(this, jQuery); |