var ace = require('ace-builds'); var _ = require('underscore'); // ace-builds also has a minified build (src-min-noconflict), but we don't // use it since webpack already handles minification. require('ace-builds/src-noconflict/mode-python'); require('ace-builds/src-noconflict/theme-chrome'); require('ace-builds/src-noconflict/theme-dracula'); require('ace-builds/src-noconflict/ext-language_tools'); var {setupAceEditorCompletions} = require('./AceEditorCompletions'); var dom = require('../lib/dom'); var dispose = require('../lib/dispose'); var modelUtil = require('../models/modelUtil'); var {gristThemeObs} = require('../ui2018/theme'); /** * A class to help set up the ace editor with standard formatting and convenience functions * @param {Observable} options.observable: If given, creates a 2-way binding between the observable * and the value of the editor. * @param {Boolean} options.saveValueOnBlurEvent: Flag to indicate whether ace editor * should save the value on `blur` event. * @param {Function} options.calcSize: Optional function used to resize the editor. It is called * with (elem, desiredSize) as arguments, and should return the actual size to use for the * element. Both desiredSize and the return value are objects with 'width' and 'height' members. */ function AceEditor(options) { options = options || {}; // Observable subscription is not created until the dom is built this.observable = options.observable || null; this.saveValueOnBlurEvent = !(options.saveValueOnBlurEvent === false); this.calcSize = options.calcSize || ((_elem, size) => size); this.editorState = options.editorState || null; this._readonly = options.readonly || false; this._getSuggestions = options.getSuggestions || null; this.editor = null; this.editorDom = null; this.session = null; this._setupCallback = null; this._setupTimer = null; this.textPadding = 10; // Space after cursor when not using wrap mode } dispose.makeDisposable(AceEditor); // Builds editor dom with additional setup possible in function `optSetupCallback`. // May be called multiple times by an instance of AceEditor. AceEditor.prototype.buildDom = function(optSetupCallback) { this._fullDom = dom('div.code_editor_container', this.editorDom = dom('div') ); this._setupCallback = optSetupCallback; this._setupTimer = setTimeout(() => this._setup(), 0); return this._fullDom; }; /** * You may optionally call this once the DOM returned from buildDom is attached to the document to * make setup and sizing more immediate. */ AceEditor.prototype.onAttach = function() { if (this._setupTimer) { clearTimeout(this._setupTimer); this._setupTimer = null; this._setup(); } }; AceEditor.prototype.writeObservable = function() { if (this.observable) { modelUtil.setSaveValue(this.observable, this.getValue()); } }; AceEditor.prototype.getEditor = function() { return this.editor; }; AceEditor.prototype.getValue = function() { return this.editor && this.editor.getValue(); }; /** * @param {String} val: The new value to set the editor to. * @param {Number} optCursorPos: Position where to place the cursor: at the end if omitted. */ AceEditor.prototype.setValue = function(val, optCursorPos) { // Note that underlying setValue() has a special meaning for second parameter: // undefined or 0 is selectAll, -1 is at the document start, and 1 is at the end. this.editor.setValue(val, optCursorPos === 0 ? -1 : 1); if (optCursorPos > 0 && optCursorPos < val.length) { var pos = this.session.getDocument().indexToPosition(optCursorPos); this.editor.moveCursorTo(pos.row, pos.column); } }; AceEditor.prototype.isBuilt = function() { return this.editor !== null; }; // Enables or disables the AceEditor AceEditor.prototype.enable = function(bool) { var editor = this.editor; editor.setReadOnly(!bool); editor.renderer.$cursorLayer.element.style.opacity = bool ? 100 : 0; editor.gotoLine(Infinity, Infinity); // Prevents text selection on disable }; /** * Commands must be added specially to the ace editor. * Attaching commands to the textarea using commandGroup.attach() only * works for certain keys. * * Note: Commands to the aceEditor are always enabled. * Note: Ace defers to standard behavior when false is returned. */ AceEditor.prototype.attachCommandGroup = function(commandGroup) { _.each(commandGroup.knownKeys, (commandName, key) => { this.editor.commands.addCommand({ name: commandName, // We are setting readonly as true to enable all commands // in a readonly mode. // Because FieldEditor in readonly mode will rewire all commands that // modify state, we are safe to enable them. readOnly: this._readonly, bindKey: { win: key, mac: key, sender: 'editor|cli' }, // AceEditor wants a command to return true if it got handled, whereas our command returns // true to avoid stopPropagation/preventDefault, i.e. if it hasn't been handled. exec: () => !commandGroup.commands[commandName]() }); }); }; /** * Attaches a command to the editor which saves the current editor * contents to the attached observable on 'Shift+Enter'. * Throws error if there is no attached observable. * TODO: Use instead of custom save command for more implementations of AceEditor */ AceEditor.prototype.attachSaveCommand = function() { if (!this.observable) { throw new Error("Cannot attach save command to editor with no bound observable"); } this.editor.commands.addCommand({ name: 'saveFormula', bindKey: { sender: 'editor|cli' }, // AceEditor wants a command to return true if it got handled exec: () => { this.writeObservable(); return true; } }); }; // Wraps words to the current width of the editor AceEditor.prototype.adjustContentToWidth = function() { var characterWidth = this.editor.renderer.characterWidth; var contentWidth = this.editor.renderer.scroller.clientWidth; if(contentWidth > 0) { this.editor.getSession().setWrapLimit(parseInt(contentWidth/characterWidth, 10) - 1); } }; /** * Provides opportunity to execute some functionality when value in the editor has changed. * Happens every time user types something to the control. */ AceEditor.prototype.onChange = function() { if (this.editorState) this.editorState.set(this.getValue()); this.resize(); }; AceEditor.prototype.setFontSize = function(pxVal) { this.editor.setFontSize(pxVal); this.resize(); }; AceEditor.prototype._setup = function() { // Standard editor setup this.editor = this.autoDisposeWith('destroy', ace.edit(this.editorDom)); if (this._getSuggestions) { setupAceEditorCompletions(this.editor, {getSuggestions: this._getSuggestions}); } this.editor.setOptions({ enableLiveAutocompletion: true, // use autocompletion without needing special activation. }); this.session = this.editor.getSession(); this.session.setMode('ace/mode/python'); this._setAceTheme(gristThemeObs().get()); this.autoDispose(gristThemeObs().addListener((newTheme) => { this._setAceTheme(newTheme); })); // Default line numbers to hidden this.editor.renderer.setShowGutter(false); this.session.setTabSize(2); this.session.setUseWrapMode(true); this.editor.on('change', this.onChange.bind(this)); this.editor.$blockScrolling = Infinity; this.editor.setFontSize(11); this.resize(); // Set up the bound observable if supplied if (this.observable) { var subscription = this.observable.subscribeInit(val => {if (val !== undefined) {this.setValue(val);}}); // Dispose with dom since subscription is created when dom is created dom(this.editorDom, dom.autoDispose(subscription) ); if (this.saveValueOnBlurEvent) { this.editor.on('blur', () => { this.writeObservable(); }); } } if (this._setupCallback) { this._setupCallback.call(null, this.editor); this._setupCallback = null; } }; AceEditor.prototype.resize = function() { var wrap = this.session.getUseWrapMode(); var contentWidth = wrap ? 0 : this._getContentWidth(); var contentHeight = this._getContentHeight(); var desiredSize = { width: wrap ? 0 : contentWidth + this.textPadding, height: contentHeight, }; var size = this.calcSize(this._fullDom, desiredSize); if (size.height < contentHeight) { // Editor will show a vertical scrollbar, so recalculate to make space for it. desiredSize.width += 20; size = this.calcSize(this._fullDom, desiredSize); } if (size.width < contentWidth) { // Editor will show a horizontal scrollbar, so recalculate to make space for it. desiredSize.height += 20; size = this.calcSize(this._fullDom, desiredSize); } // Setting height or width to number like 100.00000005 won't work (it will be truncated). // Unfortunately ace editor will do the same math we do, and will expect the height or width // of the container to be 100.0000005, and when it finds out that it is only 100px will show // scrollbars. To fix this issue we will make the container a little bit bigger. // This won't help for zooming (where the same problem occurs but in many more places), but will // help for Windows users who have different pixel ratio. this.editorDom.style.width = size.width ? Math.ceil(size.width) + 'px' : 'auto'; this.editorDom.style.height = size.height ? Math.ceil(size.height) + 'px' : 'auto'; this.editor.resize(); }; AceEditor.prototype._getContentWidth = function() { return this.session.getScreenWidth() * this.editor.renderer.characterWidth; }; AceEditor.prototype._getContentHeight = function() { return Math.max(1, this.session.getScreenLength()) * this.editor.renderer.lineHeight; }; AceEditor.prototype._setAceTheme = function(newTheme) { const {appearance} = newTheme; const aceTheme = appearance === 'dark' ? 'dracula' : 'chrome'; this.editor.setTheme(`ace/theme/${aceTheme}`); }; let _RangeConstructor = null; //singleton, load it lazily AceEditor.makeRange = function(a, b, c, d) { _RangeConstructor = _RangeConstructor || ace.require('ace/range').Range; return new _RangeConstructor(a, b, c, d); }; module.exports = AceEditor;