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//----------------------------------------------------------------------------
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// Copyright (C) 2008-2011 The IPython Development Team
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//
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// Distributed under the terms of the BSD License. The full license is in
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// the file COPYING, distributed as part of this software.
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//----------------------------------------------------------------------------
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//============================================================================
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// TextCell
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//============================================================================
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var IPython = (function (IPython) {
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// TextCell base class
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var TextCell = function (notebook) {
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this.code_mirror_mode = this.code_mirror_mode || 'htmlmixed';
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IPython.Cell.apply(this, arguments);
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this.rendered = false;
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this.cell_type = this.cell_type || 'text';
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};
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TextCell.prototype = new IPython.Cell();
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TextCell.prototype.create_element = function () {
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var cell = $("<div>").addClass('cell text_cell border-box-sizing');
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cell.attr('tabindex','2');
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var input_area = $('<div/>').addClass('text_cell_input border-box-sizing');
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this.code_mirror = CodeMirror(input_area.get(0), {
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indentUnit : 4,
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mode: this.code_mirror_mode,
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theme: 'default',
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value: this.placeholder,
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readOnly: this.read_only,
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lineWrapping : true,
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onKeyEvent: $.proxy(this.handle_codemirror_keyevent,this)
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});
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// The tabindex=-1 makes this div focusable.
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var render_area = $('<div/>').addClass('text_cell_render border-box-sizing').
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addClass('rendered_html').attr('tabindex','-1');
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cell.append(input_area).append(render_area);
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this.element = cell;
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};
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TextCell.prototype.bind_events = function () {
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IPython.Cell.prototype.bind_events.apply(this);
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var that = this;
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this.element.keydown(function (event) {
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if (event.which === 13) {
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if (that.rendered) {
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that.edit();
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return false;
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};
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};
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});
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this.element.dblclick(function () {
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that.edit();
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});
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};
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TextCell.prototype.handle_codemirror_keyevent = function (editor, event) {
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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. Its return
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// value is used to determine if CodeMirror should ignore the event:
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// true = ignore, false = don't ignore.
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if (event.keyCode === 13 && (event.shiftKey || event.ctrlKey)) {
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// Always ignore shift-enter in CodeMirror as we handle it.
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return true;
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}
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return false;
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};
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TextCell.prototype.select = function () {
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IPython.Cell.prototype.select.apply(this);
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var output = this.element.find("div.text_cell_render");
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output.trigger('focus');
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};
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TextCell.prototype.unselect = function() {
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// render on selection of another cell
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this.render();
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IPython.Cell.prototype.unselect.apply(this);
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};
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TextCell.prototype.edit = function () {
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if ( this.read_only ) return;
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if (this.rendered === true) {
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var text_cell = this.element;
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var output = text_cell.find("div.text_cell_render");
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output.hide();
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text_cell.find('div.text_cell_input').show();
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this.code_mirror.refresh();
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this.code_mirror.focus();
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// We used to need an additional refresh() after the focus, but
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// it appears that this has been fixed in CM. This bug would show
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// up on FF when a newly loaded markdown cell was edited.
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this.rendered = false;
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if (this.get_text() === this.placeholder) {
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this.set_text('');
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this.refresh();
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}
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}
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};
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// Subclasses must define render.
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TextCell.prototype.render = function () {};
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TextCell.prototype.get_text = function() {
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return this.code_mirror.getValue();
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};
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TextCell.prototype.set_text = function(text) {
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this.code_mirror.setValue(text);
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this.code_mirror.refresh();
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};
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TextCell.prototype.get_rendered = function() {
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return this.element.find('div.text_cell_render').html();
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};
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TextCell.prototype.set_rendered = function(text) {
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this.element.find('div.text_cell_render').html(text);
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};
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TextCell.prototype.at_top = function () {
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if (this.rendered) {
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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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TextCell.prototype.at_bottom = function () {
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if (this.rendered) {
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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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TextCell.prototype.fromJSON = function (data) {
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if (data.cell_type === this.cell_type) {
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if (data.source !== undefined) {
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this.set_text(data.source);
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this.set_rendered(data.rendered || '');
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this.rendered = false;
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this.render();
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}
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}
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};
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TextCell.prototype.toJSON = function () {
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var data = {};
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data.cell_type = this.cell_type;
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data.source = this.get_text();
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return data;
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};
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// HTMLCell
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var HTMLCell = function (notebook) {
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this.placeholder = "Type <strong>HTML</strong> and LaTeX: $\\alpha^2$";
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IPython.TextCell.apply(this, arguments);
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this.cell_type = 'html';
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};
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HTMLCell.prototype = new TextCell();
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HTMLCell.prototype.render = function () {
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if (this.rendered === false) {
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var text = this.get_text();
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if (text === "") { text = this.placeholder; }
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this.set_rendered(text);
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this.typeset();
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this.element.find('div.text_cell_input').hide();
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this.element.find("div.text_cell_render").show();
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this.rendered = true;
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}
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};
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// MarkdownCell
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var MarkdownCell = function (notebook) {
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this.placeholder = "Type *Markdown* and LaTeX: $\\alpha^2$";
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IPython.TextCell.apply(this, arguments);
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this.cell_type = 'markdown';
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};
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MarkdownCell.prototype = new TextCell();
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MarkdownCell.prototype.render = function () {
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if (this.rendered === false) {
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var text = this.get_text();
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if (text === "") { text = this.placeholder; }
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var html = IPython.markdown_converter.makeHtml(text);
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this.set_rendered(html);
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this.typeset()
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this.element.find('div.text_cell_input').hide();
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this.element.find("div.text_cell_render").show();
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var code_snippets = this.element.find("pre > code");
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code_snippets.replaceWith(function () {
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var code = $(this).html();
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/* Substitute br for newlines and for spaces
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before highlighting, since prettify doesn't
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preserve those on all browsers */
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code = code.replace(/(\r\n|\n|\r)/gm, "<br/>");
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code = code.replace(/ /gm, ' ');
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code = prettyPrintOne(code);
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return '<code class="prettyprint">' + code + '</code>';
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});
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this.rendered = true;
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}
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};
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// RSTCell
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var RSTCell = function (notebook) {
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this.placeholder = "Type *ReStructured Text* and LaTeX: $\\alpha^2$";
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this.code_mirror_mode = 'rst';
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IPython.TextCell.apply(this, arguments);
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this.cell_type = 'rst';
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};
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RSTCell.prototype = new TextCell();
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RSTCell.prototype.render = function () {
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this.rendered = true;
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this.edit();
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};
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RSTCell.prototype.select = function () {
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IPython.Cell.prototype.select.apply(this);
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// In some cases (inserting a new cell) we need a refresh before and
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// after the focus. Not sure why this is the case.
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this.code_mirror.refresh();
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this.code_mirror.focus();
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this.code_mirror.refresh();
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};
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RSTCell.prototype.at_top = function () {
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var cursor = this.code_mirror.getCursor();
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if (cursor.line === 0) {
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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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RSTCell.prototype.at_bottom = function () {
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var cursor = this.code_mirror.getCursor();
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if (cursor.line === (this.code_mirror.lineCount()-1)) {
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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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// HTMLCell
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var HeadingCell = function (notebook) {
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this.placeholder = "Type Heading Here";
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IPython.TextCell.apply(this, arguments);
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this.cell_type = 'heading';
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this.level = 1;
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};
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HeadingCell.prototype = new TextCell();
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HeadingCell.prototype.set_rendered = function (text) {
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var r = this.element.find("div.text_cell_render");
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r.empty();
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r.append($('<h1/>').html(text));
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}
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HeadingCell.prototype.get_rendered = function () {
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var r = this.element.find("div.text_cell_render");
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return r.children().first().html();
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}
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HeadingCell.prototype.render = function () {
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if (this.rendered === false) {
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var text = this.get_text();
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if (text === "") { text = this.placeholder; }
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this.set_rendered(text);
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this.typeset();
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this.element.find('div.text_cell_input').hide();
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this.element.find("div.text_cell_render").show();
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this.rendered = true;
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}
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};
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IPython.TextCell = TextCell;
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IPython.HTMLCell = HTMLCell;
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IPython.MarkdownCell = MarkdownCell;
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IPython.RSTCell = RSTCell;
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return IPython;
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}(IPython));
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