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//============================================================================
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// CodeCell
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//============================================================================
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var IPython = (function (IPython) {
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var utils = IPython.utils;
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var CodeCell = function (notebook) {
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this.code_mirror = null;
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this.input_prompt_number = ' ';
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this.is_completing = false;
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this.completion_cursor = null;
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this.outputs = [];
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this.collapsed = false;
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IPython.Cell.apply(this, arguments);
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};
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CodeCell.prototype = new IPython.Cell();
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CodeCell.prototype.create_element = function () {
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var cell = $('<div></div>').addClass('cell border-box-sizing code_cell vbox');
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var input = $('<div></div>').addClass('input hbox');
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input.append($('<div/>').addClass('prompt input_prompt'));
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var input_area = $('<div/>').addClass('input_area box-flex1');
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this.code_mirror = CodeMirror(input_area.get(0), {
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indentUnit : 4,
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mode: 'python',
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theme: 'ipython',
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onKeyEvent: $.proxy(this.handle_codemirror_keyevent,this)
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});
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input.append(input_area);
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var output = $('<div></div>').addClass('output vbox');
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cell.append(input).append(output);
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this.element = cell;
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this.collapse()
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};
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CodeCell.prototype.handle_codemirror_keyevent = function (editor, event) {
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// This method gets called in CodeMirror's onKeyDown/onKeyPress handlers and
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// is used to provide custom key handling. Its return value is used to determine
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// if CodeMirror should ignore the event: true = ignore, false = don't ignore.
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if (event.keyCode === 13 && event.shiftKey) {
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// Always ignore shift-enter in CodeMirror as we handle it.
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return true;
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} else if (event.keyCode === 9) {
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var cur = editor.getCursor();
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var pre_cursor = editor.getRange({line:cur.line,ch:0},cur).trim();
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if (pre_cursor === "") {
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// Don't autocomplete if the part of the line before the cursor is empty.
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// In this case, let CodeMirror handle indentation.
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return false;
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} else {
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// Autocomplete the current line.
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event.stop();
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var line = editor.getLine(cur.line);
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this.is_completing = true;
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this.completion_cursor = cur;
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IPython.notebook.complete_cell(this, line, cur.ch);
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return true;
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}
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} else if (event.keyCode === 8 && event.type == 'keydown') {
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// If backspace and the line ends with 4 spaces, remove them.
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var cur = editor.getCursor();
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var line = editor.getLine(cur.line);
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var ending = line.slice(-4);
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if (ending === ' ') {
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editor.replaceRange('',
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{line: cur.line, ch: cur.ch-4},
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{line: cur.line, ch: cur.ch}
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);
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event.stop();
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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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} else {
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if (this.is_completing && this.completion_cursor !== editor.getCursor()) {
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this.is_completing = false;
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this.completion_cursor = null;
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}
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return false;
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};
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};
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CodeCell.prototype.finish_completing = function (matched_text, matches) {
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if (!this.is_completing || matches.length === 0) {return;}
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// console.log("Got matches", matched_text, matches);
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var that = this;
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var cur = this.completion_cursor;
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var complete = $('<div/>').addClass('completions');
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var select = $('<select/>').attr('multiple','true');
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for (var i=0; i<matches.length; ++i) {
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select.append($('<option/>').text(matches[i]));
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}
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select.children().first().attr('selected','true');
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select.attr('size',Math.min(10,matches.length));
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var pos = this.code_mirror.cursorCoords();
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complete.css('left',pos.x+'px');
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complete.css('top',pos.yBot+'px');
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complete.append(select);
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$('body').append(complete);
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var done = false;
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var insert = function (selected_text) {
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that.code_mirror.replaceRange(
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selected_text,
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{line: cur.line, ch: (cur.ch-matched_text.length)},
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{line: cur.line, ch: cur.ch}
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);
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};
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var close = function () {
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if (done) return;
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done = true;
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complete.remove();
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that.is_completing = false;
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that.completion_cursor = null;
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};
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var pick = function () {
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insert(select.val()[0]);
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close();
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setTimeout(function(){that.code_mirror.focus();}, 50);
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};
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select.blur(close);
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select.keydown(function (event) {
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var code = event.which;
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if (code === 13 || code === 32) {
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// Pressing SPACE or ENTER will cause a pick
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event.stopPropagation();
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event.preventDefault();
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pick();
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} else if (code === 38 || code === 40) {
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// We don't want the document keydown handler to handle UP/DOWN,
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// but we want the default action.
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event.stopPropagation();
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} else {
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// All other key presses simple exit completion.
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event.stopPropagation();
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event.preventDefault();
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close();
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that.code_mirror.focus();
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}
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});
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// Double click also causes a pick.
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select.dblclick(pick);
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select.focus();
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};
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CodeCell.prototype.select = function () {
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IPython.Cell.prototype.select.apply(this);
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// Todo: this dance is needed because as of CodeMirror 2.12, focus is
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// not causing the cursor to blink if the editor is empty initially.
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// While this seems to fix the issue, this should be fixed
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// in CodeMirror proper.
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var s = this.code_mirror.getValue();
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if (s === '') this.code_mirror.setValue('.');
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this.code_mirror.focus();
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if (s === '') this.code_mirror.setValue('');
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};
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CodeCell.prototype.append_output = function (json) {
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this.expand();
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if (json.output_type === 'pyout') {
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this.append_pyout(json);
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} else if (json.output_type === 'pyerr') {
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this.append_pyerr(json);
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} else if (json.output_type === 'display_data') {
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this.append_display_data(json);
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} else if (json.output_type === 'stream') {
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this.append_stream(json);
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};
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this.outputs.push(json);
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};
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CodeCell.prototype.append_pyout = function (json) {
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n = json.prompt_number || ' ';
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var toinsert = $("<div/>").addClass("output_pyout hbox");
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toinsert.append($('<div/>').
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addClass('prompt output_prompt').
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html('Out[' + n + ']:')
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);
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this.append_mime_type(json, toinsert).addClass('output_area');
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toinsert.children().last().addClass("box_flex1 pyout_area");
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this.element.find("div.output").append(toinsert);
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// If we just output latex, typeset it.
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if (json.latex !== undefined) {
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MathJax.Hub.Queue(["Typeset",MathJax.Hub]);
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};
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};
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CodeCell.prototype.append_pyerr = function (json) {
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var tb = json.traceback;
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if (tb !== undefined && tb.length > 0) {
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var s = '';
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var len = tb.length;
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for (var i=0; i<len; i++) {
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s = s + tb[i] + '\n';
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}
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s = s + '\n';
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this.append_text(s).addClass('output_area');
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};
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};
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CodeCell.prototype.append_stream = function (json) {
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this.append_text(json.text).addClass('output_area');
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};
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CodeCell.prototype.append_display_data = function (json) {
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this.append_mime_type(json).addClass('output_area');
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};
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CodeCell.prototype.append_mime_type = function (json, element) {
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if (json.html !== undefined) {
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this.append_html(json.html, element);
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} else if (json.latex !== undefined) {
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this.append_latex(json.latex, element);
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// If it is undefined, then we just appended to div.output, which
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// makes the latex visible and we can typeset it. The typesetting
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// has to be done after the latex is on the page.
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if (element === undefined) {
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MathJax.Hub.Queue(["Typeset",MathJax.Hub]);
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};
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} else if (json.svg !== undefined) {
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this.append_svg(json.svg, element);
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} else if (json.png !== undefined) {
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this.append_png(json.png, element);
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} else if (json.jpeg !== undefined) {
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this.append_jpeg(json.jpeg, element);
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} else if (json.text !== undefined) {
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this.append_text(json.text, element);
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};
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return element;
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};
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CodeCell.prototype.append_html = function (html, element) {
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element = element || this.element.find("div.output");
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var toinsert = $("<div/>").addClass("output_html rendered_html");
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toinsert.append(html);
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element.append(toinsert);
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return element;
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}
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CodeCell.prototype.append_text = function (data, element) {
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element = element || this.element.find("div.output");
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var toinsert = $("<div/>").addClass("output_stream");
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toinsert.append($("<pre/>").html(data));
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element.append(toinsert);
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return element;
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};
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CodeCell.prototype.append_svg = function (svg, element) {
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element = element || this.element.find("div.output");
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var toinsert = $("<div/>").addClass("output_svg");
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toinsert.append(svg);
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element.append(toinsert);
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return element;
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};
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CodeCell.prototype.append_png = function (png, element) {
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element = element || this.element.find("div.output");
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var toinsert = $("<div/>").addClass("output_png");
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toinsert.append($("<img/>").attr('src','data:image/png;base64,'+png));
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element.append(toinsert);
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return element;
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};
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CodeCell.prototype.append_jpeg = function (jpeg, element) {
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element = element || this.element.find("div.output");
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var toinsert = $("<div/>").addClass("output_jpeg");
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toinsert.append($("<img/>").attr('src','data:image/jpeg;base64,'+jpeg));
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element.append(toinsert);
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return element;
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};
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CodeCell.prototype.append_latex = function (latex, element) {
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// This method cannot do the typesetting because the latex first has to
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// be on the page.
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element = element || this.element.find("div.output");
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var toinsert = $("<div/>").addClass("output_latex");
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toinsert.append(latex);
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element.append(toinsert);
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return element;
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}
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CodeCell.prototype.clear_output = function () {
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this.element.find("div.output").html("");
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this.outputs = [];
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};
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CodeCell.prototype.clear_input = function () {
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this.code_mirror.setValue('');
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};
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CodeCell.prototype.collapse = function () {
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if (!this.collapsed) {
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this.element.find('div.output').hide();
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this.collapsed = true;
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};
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};
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CodeCell.prototype.expand = function () {
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if (this.collapsed) {
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this.element.find('div.output').show();
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this.collapsed = false;
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};
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};
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CodeCell.prototype.set_input_prompt = function (number) {
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var n = number || ' ';
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this.input_prompt_number = n
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this.element.find('div.input_prompt').html('In [' + n + ']:');
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};
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CodeCell.prototype.get_code = function () {
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return this.code_mirror.getValue();
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};
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CodeCell.prototype.set_code = function (code) {
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return this.code_mirror.setValue(code);
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};
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CodeCell.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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CodeCell.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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CodeCell.prototype.fromJSON = function (data) {
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// console.log('Import from JSON:', data);
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if (data.cell_type === 'code') {
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if (data.input !== undefined) {
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this.set_code(data.input);
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}
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if (data.prompt_number !== undefined) {
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this.set_input_prompt(data.prompt_number);
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} else {
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this.set_input_prompt();
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};
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var len = data.outputs.length;
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for (var i=0; i<len; i++) {
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this.append_output(data.outputs[i]);
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};
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if (data.collapsed !== undefined) {
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if (data.collapsed) {
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this.collapse();
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};
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};
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};
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};
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CodeCell.prototype.toJSON = function () {
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var data = {};
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data.input = this.get_code();
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data.cell_type = 'code';
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if (this.input_prompt_number !== ' ') {
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data.prompt_number = this.input_prompt_number
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};
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var outputs = [];
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var len = this.outputs.length;
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for (var i=0; i<len; i++) {
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outputs[i] = this.outputs[i];
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};
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data.outputs = outputs;
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data.language = 'python';
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data.collapsed = this.collapsed;
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// console.log('Export to JSON:',data);
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return data;
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};
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IPython.CodeCell = CodeCell;
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return IPython;
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}(IPython));
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