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// Copyright (c) IPython Development Team.
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// Distributed under the terms of the Modified BSD License.
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/**
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*
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*
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* @module cell
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* @namespace cell
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* @class Cell
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*/
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define([
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'base/js/namespace',
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'jquery',
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'base/js/utils',
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'codemirror/lib/codemirror',
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'codemirror/addon/edit/matchbrackets',
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'codemirror/addon/edit/closebrackets',
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'codemirror/addon/comment/comment'
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], function(IPython, $, utils, CodeMirror, cm_match, cm_closeb, cm_comment) {
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// TODO: remove IPython dependency here
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"use strict";
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var Cell = function (options) {
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/* Constructor
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*
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* The Base `Cell` class from which to inherit.
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* @constructor
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* @param:
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* options: dictionary
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* Dictionary of keyword arguments.
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* events: $(Events) instance
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* config: dictionary
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* keyboard_manager: KeyboardManager instance
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*/
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options = options || {};
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this.keyboard_manager = options.keyboard_manager;
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this.events = options.events;
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var config = utils.mergeopt(Cell, options.config);
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// superclass default overwrite our default
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this.placeholder = config.placeholder || '';
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this.read_only = config.cm_config.readOnly;
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this.selected = false;
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this.rendered = false;
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this.mode = 'command';
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// Metadata property
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var that = this;
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this._metadata = {};
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Object.defineProperty(this, 'metadata', {
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get: function() { return that._metadata; },
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set: function(value) {
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that._metadata = value;
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if (that.celltoolbar) {
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that.celltoolbar.rebuild();
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}
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}
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});
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// load this from metadata later ?
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this.user_highlight = 'auto';
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this.cm_config = config.cm_config;
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this.cell_id = utils.uuid();
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this._options = config;
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// For JS VM engines optimization, attributes should be all set (even
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// to null) in the constructor, and if possible, if different subclass
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// have new attributes with same name, they should be created in the
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// same order. Easiest is to create and set to null in parent class.
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this.element = null;
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this.cell_type = this.cell_type || null;
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this.code_mirror = null;
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this.create_element();
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if (this.element !== null) {
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this.element.data("cell", this);
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this.bind_events();
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this.init_classes();
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}
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};
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Cell.options_default = {
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cm_config : {
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indentUnit : 4,
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readOnly: false,
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theme: "default",
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extraKeys: {
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"Cmd-Right":"goLineRight",
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"End":"goLineRight",
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"Cmd-Left":"goLineLeft"
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}
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}
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};
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// FIXME: Workaround CM Bug #332 (Safari segfault on drag)
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// by disabling drag/drop altogether on Safari
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// https://github.com/codemirror/CodeMirror/issues/332
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if (utils.browser[0] == "Safari") {
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Cell.options_default.cm_config.dragDrop = false;
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}
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/**
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* Empty. Subclasses must implement create_element.
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* This should contain all the code to create the DOM element in notebook
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* and will be called by Base Class constructor.
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* @method create_element
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*/
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Cell.prototype.create_element = function () {
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};
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Cell.prototype.init_classes = function () {
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// Call after this.element exists to initialize the css classes
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// related to selected, rendered and mode.
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if (this.selected) {
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this.element.addClass('selected');
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} else {
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this.element.addClass('unselected');
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}
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if (this.rendered) {
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this.element.addClass('rendered');
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} else {
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this.element.addClass('unrendered');
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}
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if (this.mode === 'edit') {
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this.element.addClass('edit_mode');
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} else {
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this.element.addClass('command_mode');
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}
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};
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/**
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* Subclasses can implement override bind_events.
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* Be carefull to call the parent method when overwriting as it fires event.
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* this will be triggerd after create_element in constructor.
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* @method bind_events
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*/
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Cell.prototype.bind_events = function () {
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var that = this;
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// We trigger events so that Cell doesn't have to depend on Notebook.
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that.element.click(function (event) {
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if (!that.selected) {
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that.events.trigger('select.Cell', {'cell':that});
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}
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});
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that.element.focusin(function (event) {
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if (!that.selected) {
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that.events.trigger('select.Cell', {'cell':that});
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}
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});
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if (this.code_mirror) {
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this.code_mirror.on("change", function(cm, change) {
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that.events.trigger("set_dirty.Notebook", {value: true});
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});
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}
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if (this.code_mirror) {
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this.code_mirror.on('focus', function(cm, change) {
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that.events.trigger('edit_mode.Cell', {cell: that});
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});
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}
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if (this.code_mirror) {
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this.code_mirror.on('blur', function(cm, change) {
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that.events.trigger('command_mode.Cell', {cell: that});
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});
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}
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this.element.dblclick(function () {
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if (that.selected === false) {
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this.events.trigger('select.Cell', {'cell':that});
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}
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var cont = that.unrender();
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if (cont) {
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that.focus_editor();
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}
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});
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};
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/**
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* This method gets called in CodeMirror's onKeyDown/onKeyPress
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* handlers and is used to provide custom key handling.
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*
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* To have custom handling, subclasses should override this method, but still call it
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* in order to process the Edit mode keyboard shortcuts.
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*
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* @method handle_codemirror_keyevent
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* @param {CodeMirror} editor - The codemirror instance bound to the cell
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* @param {event} event - key press event which either should or should not be handled by CodeMirror
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* @return {Boolean} `true` if CodeMirror should ignore the event, `false` Otherwise
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*/
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Cell.prototype.handle_codemirror_keyevent = function (editor, event) {
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var shortcuts = this.keyboard_manager.edit_shortcuts;
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var cur = editor.getCursor();
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if((cur.line !== 0 || cur.ch !==0) && event.keyCode === 38){
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event._ipkmIgnore = true;
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}
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var nLastLine = editor.lastLine();
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if ((event.keyCode === 40) &&
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((cur.line !== nLastLine) ||
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(cur.ch !== editor.getLineHandle(nLastLine).text.length))
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) {
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event._ipkmIgnore = true;
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}
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// if this is an edit_shortcuts shortcut, the global keyboard/shortcut
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// manager will handle it
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if (shortcuts.handles(event)) {
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return true;
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}
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return false;
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};
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/**
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* Triger typsetting of math by mathjax on current cell element
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* @method typeset
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*/
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Cell.prototype.typeset = function () {
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if (window.MathJax) {
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var cell_math = this.element.get(0);
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MathJax.Hub.Queue(["Typeset", MathJax.Hub, cell_math]);
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}
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};
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/**
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* handle cell level logic when a cell is selected
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* @method select
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* @return is the action being taken
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*/
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Cell.prototype.select = function () {
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if (!this.selected) {
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this.element.addClass('selected');
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this.element.removeClass('unselected');
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this.selected = true;
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return true;
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} else {
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return false;
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}
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};
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/**
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* handle cell level logic when a cell is unselected
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* @method unselect
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* @return is the action being taken
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*/
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Cell.prototype.unselect = function () {
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if (this.selected) {
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this.element.addClass('unselected');
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this.element.removeClass('selected');
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this.selected = false;
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return true;
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} else {
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return false;
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}
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};
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/**
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* should be overritten by subclass
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* @method execute
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*/
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Cell.prototype.execute = function () {
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return;
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};
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/**
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* handle cell level logic when a cell is rendered
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* @method render
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* @return is the action being taken
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*/
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Cell.prototype.render = function () {
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if (!this.rendered) {
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this.element.addClass('rendered');
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this.element.removeClass('unrendered');
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this.rendered = true;
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return true;
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} else {
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return false;
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}
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};
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/**
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* handle cell level logic when a cell is unrendered
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* @method unrender
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* @return is the action being taken
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*/
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Cell.prototype.unrender = function () {
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if (this.rendered) {
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this.element.addClass('unrendered');
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this.element.removeClass('rendered');
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this.rendered = false;
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return true;
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} else {
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return false;
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}
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};
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/**
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* Delegates keyboard shortcut handling to either IPython keyboard
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* manager when in command mode, or CodeMirror when in edit mode
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*
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* @method handle_keyevent
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* @param {CodeMirror} editor - The codemirror instance bound to the cell
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* @param {event} - key event to be handled
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* @return {Boolean} `true` if CodeMirror should ignore the event, `false` Otherwise
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*/
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Cell.prototype.handle_keyevent = function (editor, event) {
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if (this.mode === 'command') {
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return true;
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} else if (this.mode === 'edit') {
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return this.handle_codemirror_keyevent(editor, event);
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}
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};
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/**
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* @method at_top
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* @return {Boolean}
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*/
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Cell.prototype.at_top = function () {
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var cm = this.code_mirror;
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var cursor = cm.getCursor();
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if (cursor.line === 0 && cursor.ch === 0) {
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return true;
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}
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return false;
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};
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/**
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* @method at_bottom
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* @return {Boolean}
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* */
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Cell.prototype.at_bottom = function () {
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var cm = this.code_mirror;
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var cursor = cm.getCursor();
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if (cursor.line === (cm.lineCount()-1) && cursor.ch === cm.getLine(cursor.line).length) {
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return true;
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}
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return false;
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};
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/**
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* enter the command mode for the cell
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* @method command_mode
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* @return is the action being taken
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*/
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Cell.prototype.command_mode = function () {
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if (this.mode !== 'command') {
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this.element.addClass('command_mode');
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this.element.removeClass('edit_mode');
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this.mode = 'command';
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return true;
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} else {
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return false;
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}
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};
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/**
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* enter the edit mode for the cell
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* @method command_mode
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* @return is the action being taken
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*/
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Cell.prototype.edit_mode = function () {
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if (this.mode !== 'edit') {
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this.element.addClass('edit_mode');
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this.element.removeClass('command_mode');
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this.mode = 'edit';
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return true;
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} else {
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return false;
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}
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};
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/**
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* Focus the cell in the DOM sense
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* @method focus_cell
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*/
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Cell.prototype.focus_cell = function () {
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this.element.focus();
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};
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/**
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* Focus the editor area so a user can type
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*
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* NOTE: If codemirror is focused via a mouse click event, you don't want to
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* call this because it will cause a page jump.
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* @method focus_editor
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*/
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Cell.prototype.focus_editor = function () {
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this.refresh();
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this.code_mirror.focus();
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};
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/**
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* Refresh codemirror instance
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* @method refresh
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*/
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Cell.prototype.refresh = function () {
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if (this.code_mirror) {
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this.code_mirror.refresh();
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}
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};
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/**
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* should be overritten by subclass
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* @method get_text
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*/
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Cell.prototype.get_text = function () {
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};
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/**
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* should be overritten by subclass
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* @method set_text
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* @param {string} text
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*/
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Cell.prototype.set_text = function (text) {
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};
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/**
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* should be overritten by subclass
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* serialise cell to json.
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* @method toJSON
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**/
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Cell.prototype.toJSON = function () {
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var data = {};
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// deepcopy the metadata so copied cells don't share the same object
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data.metadata = JSON.parse(JSON.stringify(this.metadata));
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data.cell_type = this.cell_type;
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return data;
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};
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/**
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* should be overritten by subclass
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* @method fromJSON
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**/
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Cell.prototype.fromJSON = function (data) {
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if (data.metadata !== undefined) {
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this.metadata = data.metadata;
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}
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};
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/**
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* can the cell be split into two cells (false if not deletable)
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* @method is_splittable
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**/
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Cell.prototype.is_splittable = function () {
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return this.is_deletable();
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};
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/**
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* can the cell be merged with other cells (false if not deletable)
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* @method is_mergeable
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**/
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Cell.prototype.is_mergeable = function () {
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return this.is_deletable();
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};
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/**
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* is the cell deletable? only false (undeletable) if
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* metadata.deletable is explicitly false -- everything else
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* counts as true
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*
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* @method is_deletable
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**/
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Cell.prototype.is_deletable = function () {
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if (this.metadata.deletable === false) {
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return false;
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}
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return true;
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};
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/**
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* @return {String} - the text before the cursor
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* @method get_pre_cursor
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**/
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Cell.prototype.get_pre_cursor = function () {
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var cursor = this.code_mirror.getCursor();
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var text = this.code_mirror.getRange({line:0, ch:0}, cursor);
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|
text = text.replace(/^\n+/, '').replace(/\n+$/, '');
|
|
|
return text;
|
|
|
};
|
|
|
|
|
|
|
|
|
/**
|
|
|
* @return {String} - the text after the cursor
|
|
|
* @method get_post_cursor
|
|
|
**/
|
|
|
Cell.prototype.get_post_cursor = function () {
|
|
|
var cursor = this.code_mirror.getCursor();
|
|
|
var last_line_num = this.code_mirror.lineCount()-1;
|
|
|
var last_line_len = this.code_mirror.getLine(last_line_num).length;
|
|
|
var end = {line:last_line_num, ch:last_line_len};
|
|
|
var text = this.code_mirror.getRange(cursor, end);
|
|
|
text = text.replace(/^\n+/, '').replace(/\n+$/, '');
|
|
|
return text;
|
|
|
};
|
|
|
|
|
|
/**
|
|
|
* Show/Hide CodeMirror LineNumber
|
|
|
* @method show_line_numbers
|
|
|
*
|
|
|
* @param value {Bool} show (true), or hide (false) the line number in CodeMirror
|
|
|
**/
|
|
|
Cell.prototype.show_line_numbers = function (value) {
|
|
|
this.code_mirror.setOption('lineNumbers', value);
|
|
|
this.code_mirror.refresh();
|
|
|
};
|
|
|
|
|
|
/**
|
|
|
* Toggle CodeMirror LineNumber
|
|
|
* @method toggle_line_numbers
|
|
|
**/
|
|
|
Cell.prototype.toggle_line_numbers = function () {
|
|
|
var val = this.code_mirror.getOption('lineNumbers');
|
|
|
this.show_line_numbers(!val);
|
|
|
};
|
|
|
|
|
|
/**
|
|
|
* Force codemirror highlight mode
|
|
|
* @method force_highlight
|
|
|
* @param {object} - CodeMirror mode
|
|
|
**/
|
|
|
Cell.prototype.force_highlight = function(mode) {
|
|
|
this.user_highlight = mode;
|
|
|
this.auto_highlight();
|
|
|
};
|
|
|
|
|
|
/**
|
|
|
* Try to autodetect cell highlight mode, or use selected mode
|
|
|
* @methods _auto_highlight
|
|
|
* @private
|
|
|
* @param {String|object|undefined} - CodeMirror mode | 'auto'
|
|
|
**/
|
|
|
Cell.prototype._auto_highlight = function (modes) {
|
|
|
//Here we handle manually selected modes
|
|
|
var that = this;
|
|
|
var mode;
|
|
|
if( this.user_highlight !== undefined && this.user_highlight != 'auto' )
|
|
|
{
|
|
|
mode = this.user_highlight;
|
|
|
CodeMirror.autoLoadMode(this.code_mirror, mode);
|
|
|
this.code_mirror.setOption('mode', mode);
|
|
|
return;
|
|
|
}
|
|
|
var current_mode = this.code_mirror.getOption('mode', mode);
|
|
|
var first_line = this.code_mirror.getLine(0);
|
|
|
// loop on every pairs
|
|
|
for(mode in modes) {
|
|
|
var regs = modes[mode].reg;
|
|
|
// only one key every time but regexp can't be keys...
|
|
|
for(var i=0; i<regs.length; i++) {
|
|
|
// here we handle non magic_modes
|
|
|
if(first_line.match(regs[i]) !== null) {
|
|
|
if(current_mode == mode){
|
|
|
return;
|
|
|
}
|
|
|
if (mode.search('magic_') !== 0) {
|
|
|
utils.requireCodeMirrorMode(mode, function () {
|
|
|
that.code_mirror.setOption('mode', mode);
|
|
|
});
|
|
|
return;
|
|
|
}
|
|
|
var open = modes[mode].open || "%%";
|
|
|
var close = modes[mode].close || "%%end";
|
|
|
var magic_mode = mode;
|
|
|
mode = magic_mode.substr(6);
|
|
|
if(current_mode == magic_mode){
|
|
|
return;
|
|
|
}
|
|
|
utils.requireCodeMirrorMode(mode, function () {
|
|
|
// create on the fly a mode that switch between
|
|
|
// plain/text and something else, otherwise `%%` is
|
|
|
// source of some highlight issues.
|
|
|
CodeMirror.defineMode(magic_mode, function(config) {
|
|
|
return CodeMirror.multiplexingMode(
|
|
|
CodeMirror.getMode(config, 'text/plain'),
|
|
|
// always set something on close
|
|
|
{open: open, close: close,
|
|
|
mode: CodeMirror.getMode(config, mode),
|
|
|
delimStyle: "delimit"
|
|
|
}
|
|
|
);
|
|
|
});
|
|
|
that.code_mirror.setOption('mode', magic_mode);
|
|
|
});
|
|
|
return;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
// fallback on default
|
|
|
var default_mode;
|
|
|
try {
|
|
|
default_mode = this._options.cm_config.mode;
|
|
|
} catch(e) {
|
|
|
default_mode = 'text/plain';
|
|
|
}
|
|
|
if( current_mode === default_mode){
|
|
|
return;
|
|
|
}
|
|
|
this.code_mirror.setOption('mode', default_mode);
|
|
|
};
|
|
|
|
|
|
var UnrecognizedCell = function (options) {
|
|
|
/** Constructor for unrecognized cells */
|
|
|
Cell.apply(this, arguments);
|
|
|
this.cell_type = 'unrecognized';
|
|
|
this.celltoolbar = null;
|
|
|
this.data = {};
|
|
|
|
|
|
Object.seal(this);
|
|
|
};
|
|
|
|
|
|
UnrecognizedCell.prototype = Object.create(Cell.prototype);
|
|
|
|
|
|
|
|
|
// cannot merge or split unrecognized cells
|
|
|
UnrecognizedCell.prototype.is_mergeable = function () {
|
|
|
return false;
|
|
|
};
|
|
|
|
|
|
UnrecognizedCell.prototype.is_splittable = function () {
|
|
|
return false;
|
|
|
};
|
|
|
|
|
|
UnrecognizedCell.prototype.toJSON = function () {
|
|
|
// deepcopy the metadata so copied cells don't share the same object
|
|
|
return JSON.parse(JSON.stringify(this.data));
|
|
|
};
|
|
|
|
|
|
UnrecognizedCell.prototype.fromJSON = function (data) {
|
|
|
this.data = data;
|
|
|
if (data.metadata !== undefined) {
|
|
|
this.metadata = data.metadata;
|
|
|
} else {
|
|
|
data.metadata = this.metadata;
|
|
|
}
|
|
|
this.element.find('.inner_cell').find("a").text("Unrecognized cell type: " + data.cell_type);
|
|
|
};
|
|
|
|
|
|
UnrecognizedCell.prototype.create_element = function () {
|
|
|
Cell.prototype.create_element.apply(this, arguments);
|
|
|
var cell = this.element = $("<div>").addClass('cell unrecognized_cell');
|
|
|
cell.attr('tabindex','2');
|
|
|
|
|
|
var prompt = $('<div/>').addClass('prompt input_prompt');
|
|
|
cell.append(prompt);
|
|
|
var inner_cell = $('<div/>').addClass('inner_cell');
|
|
|
inner_cell.append(
|
|
|
$("<a>")
|
|
|
.attr("href", "#")
|
|
|
.text("Unrecognized cell type")
|
|
|
);
|
|
|
cell.append(inner_cell);
|
|
|
this.element = cell;
|
|
|
};
|
|
|
|
|
|
UnrecognizedCell.prototype.bind_events = function () {
|
|
|
Cell.prototype.bind_events.apply(this, arguments);
|
|
|
var cell = this;
|
|
|
|
|
|
this.element.find('.inner_cell').find("a").click(function () {
|
|
|
cell.events.trigger('unrecognized_cell.Cell', {cell: cell})
|
|
|
});
|
|
|
};
|
|
|
|
|
|
// Backwards compatibility.
|
|
|
IPython.Cell = Cell;
|
|
|
|
|
|
return {
|
|
|
Cell: Cell,
|
|
|
UnrecognizedCell: UnrecognizedCell
|
|
|
};
|
|
|
});
|
|
|
|
