cryptpad/www/code/main.js

require.config({ paths: { 'json.sortify': '/bower_components/json.sortify/dist/JSON.sortify' } });
define([
    '/api/config?cb=' + Math.random().toString(16).substring(2),
    '/common/messages.js',
    '/bower_components/chainpad-crypto/crypto.js',
    '/bower_components/chainpad-netflux/chainpad-netflux.js',
    '/bower_components/textpatcher/TextPatcher.amd.js',
    '/common/toolbar.js',
    'json.sortify',
    '/bower_components/chainpad-json-validator/json-ot.js',
    '/common/cryptpad-common.js',
    '/code/modes.js',
    '/code/themes.js',
    '/bower_components/file-saver/FileSaver.min.js',
    '/bower_components/jquery/dist/jquery.min.js',
    '/customize/pad.js'
], function (Config, /*RTCode,*/ Messages, Crypto, Realtime, TextPatcher, Toolbar, JSONSortify, JsonOT, Cryptpad, Modes, Themes) {
    var $ = window.jQuery;
    var saveAs = window.saveAs;
    var module = window.APP = {};
    var ifrw = module.ifrw = $('#pad-iframe')[0].contentWindow;
    var stringify = function (obj) {
        return JSONSortify(obj);
    };

    $(function () {
        var userName = Crypto.rand64(8),
            toolbar;

        var secret = Cryptpad.getSecrets();

        var andThen = function (CMeditor) {
            var CodeMirror = module.CodeMirror = CMeditor;
            CodeMirror.modeURL = "/code/codemirror-5.16.0/mode/%N/%N.js";

            var $pad = $('#pad-iframe');
            var $textarea = $pad.contents().find('#editor1');

            var editor = module.editor = CMeditor.fromTextArea($textarea[0], {
                lineNumbers: true,
                lineWrapping: true,
                autoCloseBrackets: true,
                matchBrackets : true,
                showTrailingSpace : true,
                styleActiveLine : true,
                search: true,
                highlightSelectionMatches: {showToken: /\w+/},
                extraKeys: {"Ctrl-Q": function(cm){ cm.foldCode(cm.getCursor()); }},
                foldGutter: true,
                gutters: ["CodeMirror-linenumbers", "CodeMirror-foldgutter"],
                mode: "javascript",
                readOnly: true
            });

            var setMode = module.setMode = function (mode, $select) {
                if (mode === 'text') {
                    editor.setOption('mode', 'text');
                    return;
                }
                CodeMirror.autoLoadMode(editor, mode);
                editor.setOption('mode', mode);
                if ($select && select.val) { $select.val(mode); }
            };


            var setTheme = module.setTheme = (function () {
                var path = './theme/';

                var $head = $(ifrw.document.head);

                var themeLoaded = module.themeLoaded = function (theme) {
                    return $head.find('link[href*="'+theme+'"]').length;
                };

                var loadTheme = module.loadTheme = function (theme) {
                    $head.append($('<link />', {
                        rel: 'stylesheet',
                        href: path + theme + '.css',
                    }));
                };

                return function (theme, $select) {
                    if (!theme) {
                        editor.setOption('theme', 'default');
                    } else {
                        if (!themeLoaded(theme)) {
                            loadTheme(theme);
                        }
                        editor.setOption('theme', theme);
                    }
                    if ($select && $select.val) { $select.val(theme || 'default'); }
                };
            }());

            var setEditable = module.setEditable = function (bool) {
                editor.setOption('readOnly', !bool);
            };

            var exportText = module.exportText = function () {
                var text = editor.getValue();
                var filename = window.prompt("What would you like to name your file?");
                if (filename) {
                    var blob = new Blob([text], {type: "text/plain;charset=utf-8"});
                    saveAs(blob, filename);
                }
            };

            var userList = {}; // List of pretty name of all users (mapped with their server ID)
            var toolbarList; // List of users still connected to the channel (server IDs)
            var addToUserList = function(data) {
                for (var attrname in data) { userList[attrname] = data[attrname]; }
                if(toolbarList && typeof toolbarList.onChange === "function") {
                    toolbarList.onChange(userList);
                }
            };

            var myData = {};
            var myUserName = ''; // My "pretty name"
            var myID; // My server ID

            var setMyID = function(info) {
              myID = info.myID || null;
              myUserName = myID;
            };

            var config = {
                //initialState: Messages.codeInitialState,
                userName: userName,
                websocketURL: Config.websocketURL,
                channel: secret.channel,
                //cryptKey: key,
                crypto: Crypto.createEncryptor(secret.key),
                setMyID: setMyID,
                transformFunction: JsonOT.validate
            };

            var canonicalize = function (t) { return t.replace(/\r\n/g, '\n'); };

            var initializing = true;

            var onLocal = config.onLocal = function () {
                if (initializing) { return; }

                editor.save();
                var textValue = canonicalize($textarea.val());
                var obj = {content: textValue};

                // append the userlist to the hyperjson structure
                obj.metadata = userList;

                // stringify the json and send it into chainpad
                var shjson = stringify(obj);

                module.patchText(shjson);

                if (module.realtime.getUserDoc() !== shjson) {
                    console.error("realtime.getUserDoc() !== shjson");
                }
            };

            var createChangeName = function(id, $container) {
                var buttonElmt = $container.find('#'+id)[0];
                buttonElmt.addEventListener("click", function() {
                   var newName = window.prompt("Change your name :");
                   if (newName && newName.trim()) {
                       var myUserNameTemp = newName.trim();
                       if(newName.trim().length > 32) {
                         myUserNameTemp = myUserNameTemp.substr(0, 32);
                       }
                       myUserName = myUserNameTemp;
                       myData[myID] = {
                          name: myUserName
                       };
                       addToUserList(myData);
                       onLocal();
                   }
                });
            };

            var onInit = config.onInit = function (info) {
                var $bar = $('#pad-iframe')[0].contentWindow.$('#cme_toolbox');
                toolbarList = info.userList;
                var config = {
                    userData: userList,
                    changeNameID: 'cryptpad-changeName',
                    exportContentID: 'cryptpad-saveContent',
                    importContentID: 'cryptpad-loadContent',
                };
                toolbar = info.realtime.toolbar = Toolbar.create($bar, info.myID, info.realtime, info.getLag, info.userList, config);
                createChangeName('cryptpad-changeName', $bar);

                /*  Let the user export their content with a click */
                $bar.find('#cryptpad-saveContent').click(exportText);

                /*  Let the user import content with a click */
                $bar.find('#cryptpad-loadContent')
                    .click(Cryptpad.importContent('text/plain', function (content, file) {
                        var mime = CodeMirror.findModeByMIME(file.type);

                        var mode = mime && mime.mode || null;

                        if (Modes.some(function (o) { return o.mode === mode; })) {
                            setMode(mode);
                            $bar.find('#language-mode').val(mode);
                        } else {
                            console.log("Couldn't find a suitable highlighting mode: %s", mode);
                            setMode('text');
                            $bar.find('#language-mode').val('text');
                        }

                        editor.setValue(content);
                        onLocal();
                    }));

                /*  Let the user select different syntax highlighting modes */
                var syntaxDropdown = '<select title="syntax highlighting" id="language-mode">\n' +
                    Modes.map(function (o) {
                        var selected = o.mode === 'javascript'? ' selected="selected"' : '';
                        return '<option value="' + o.mode + '"'+selected+'>' + o.language + '</option>';
                    }).join('\n') +
                    '</select>';

                /*  Remember the user's last choice of theme using localStorage */
                var themeKey = 'CRYPTPAD_CODE_THEME';
                var lastTheme = localStorage.getItem(themeKey) || 'default';

                /*  Let the user select different themes */
                var themeDropdown = '<select title="color theme" id="display-theme">\n' +
                    Themes.map(function (o) {
                        var selected = o.name === lastTheme? ' selected="selected"': '';
                        return '<option value="' + o.name + '"'+selected+'>' + o.name + '</option>';
                    }).join('\n') +
                    '</select>';

                $bar.find('.rtwysiwyg-toolbar-rightside')
                    .append(syntaxDropdown);

                var $language = module.$language = $bar.find('#language-mode').on('change', function () {
                    var mode = $language.val();
                    setMode(mode);
                });

                $bar.find('.rtwysiwyg-toolbar-rightside')
                    .append(themeDropdown);

                var $theme = $bar.find('select#display-theme');

                setTheme(lastTheme, $theme);

                $theme.on('change', function () {
                    var theme = $theme.val();
                    console.log("Setting theme to %s", theme);
                    setTheme(theme, $theme);
                    // remember user choices
                    localStorage.setItem(themeKey, theme);
                });

                window.location.hash = info.channel + secret.key;
                Cryptpad.rememberPad();
            };

            var updateUserList = function(shjson) {
                // Extract the user list (metadata) from the hyperjson
                var hjson = (shjson === "") ? "" : JSON.parse(shjson);
                if(hjson && hjson.metadata) {
                  var userData = hjson.metadata;
                  // Update the local user data
                  addToUserList(userData);
                }
            };

            var onReady = config.onReady = function (info) {
                var realtime = module.realtime = info.realtime;
                module.patchText = TextPatcher.create({
                    realtime: realtime,
                    //logging: true
                });

                var userDoc = module.realtime.getUserDoc();

                var newDoc = "";
                if(userDoc !== "") {
                    var hjson = JSON.parse(userDoc);
                    newDoc = hjson.content;
                }

                // Update the user list (metadata) from the hyperjson
                //updateUserList(shjson);

                editor.setValue(newDoc);

                setEditable(true);
                initializing = false;
            };

            var cursorToPos = function(cursor, oldText) {
                var cLine = cursor.line;
                var cCh = cursor.ch;
                var pos = 0;
                var textLines = oldText.split("\n");
                for (var line = 0; line <= cLine; line++) {
                    if(line < cLine) {
                        pos += textLines[line].length+1;
                    }
                    else if(line === cLine) {
                        pos += cCh;
                    }
                }
                return pos;
            };

            var posToCursor = function(position, newText) {
                var cursor = {
                    line: 0,
                    ch: 0
                };
                var textLines = newText.substr(0, position).split("\n");
                cursor.line = textLines.length - 1;
                cursor.ch = textLines[cursor.line].length;
                return cursor;
            };

            var onRemote = config.onRemote = function (info) {
                if (initializing) { return; }

                var oldDoc = canonicalize($textarea.val());
                var shjson = module.realtime.getUserDoc();

                // Update the user list (metadata) from the hyperjson
                updateUserList(shjson);

                var hjson = JSON.parse(shjson);
                var remoteDoc = hjson.content;

                //get old cursor here
                var oldCursor = {};
                oldCursor.selectionStart = cursorToPos(editor.getCursor('from'), oldDoc);
                oldCursor.selectionEnd = cursorToPos(editor.getCursor('to'), oldDoc);

                editor.setValue(remoteDoc);
                editor.save();

                var op = TextPatcher.diff(oldDoc, remoteDoc);
                var selects = ['selectionStart', 'selectionEnd'].map(function (attr) {
                    return TextPatcher.transformCursor(oldCursor[attr], op);
                });
                if(selects[0] === selects[1]) {
                    editor.setCursor(posToCursor(selects[0], remoteDoc));
                }
                else {
                    editor.setSelection(posToCursor(selects[0], remoteDoc), posToCursor(selects[1], remoteDoc));
                }

                var localDoc = canonicalize($textarea.val());
                var hjson2 = {
                  content: localDoc,
                  metadata: userList
                };
                var shjson2 = stringify(hjson2);
                if (shjson2 !== shjson) {
                    console.error("shjson2 !== shjson");
                    module.patchText(shjson2);
                }
            };

            var onAbort = config.onAbort = function (info) {
                // inform of network disconnect
                setEditable(false);
                window.alert("Network Connection Lost!");
            };

            var realtime = module.realtime = Realtime.start(config);

            editor.on('change', onLocal);
        };

        var interval = 100;

        var first = function () {
            if (ifrw.CodeMirror) {
                // it exists, call your continuation
                andThen(ifrw.CodeMirror);
            } else {
                console.log("CodeMirror was not defined. Trying again in %sms", interval);
                // try again in 'interval' ms
                setTimeout(first, interval);
            }
        };

        first();
    });
});