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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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// CodeCell
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//============================================================================
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var IPython = (function (IPython) {
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"use strict";
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var utils = IPython.utils;
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var key = IPython.utils.keycodes;
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var CodeCell = function (kernel) {
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// The kernel doesn't have to be set at creation time, in that case
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// it will be null and set_kernel has to be called later.
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this.kernel = kernel || null;
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this.code_mirror = null;
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this.input_prompt_number = null;
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this.tooltip_on_tab = true;
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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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cell.attr('tabindex','2');
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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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readOnly: this.read_only,
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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>');
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cell.append(input).append(output);
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this.element = cell;
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this.output_area = new IPython.OutputArea(output, true);
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// construct a completer only if class exist
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// otherwise no print view
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if (IPython.Completer !== undefined)
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{
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this.completer = new IPython.Completer(this);
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}
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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
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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 (this.read_only){
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return false;
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}
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var that = this;
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// whatever key is pressed, first, cancel the tooltip request before
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// they are sent, and remove tooltip if any, except for tab again
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if (event.type === 'keydown' && event.which != key.TAB ) {
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IPython.tooltip.remove_and_cancel_tooltip();
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};
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var cur = editor.getCursor();
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if (event.keyCode === key.ENTER && (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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} else if (event.which === 40 && event.type === 'keypress' && IPython.tooltip.time_before_tooltip >= 0) {
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// triger on keypress (!) otherwise inconsistent event.which depending on plateform
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// browser and keyboard layout !
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// Pressing '(' , request tooltip, don't forget to reappend it
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IPython.tooltip.pending(that);
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} else if (event.which === key.UPARROW && event.type === 'keydown') {
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// If we are not at the top, let CM handle the up arrow and
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// prevent the global keydown handler from handling it.
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if (!that.at_top()) {
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event.stop();
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return false;
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} else {
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return true;
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};
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} else if (event.which === key.DOWNARROW && event.type === 'keydown') {
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// If we are not at the bottom, let CM handle the down arrow and
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// prevent the global keydown handler from handling it.
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if (!that.at_bottom()) {
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event.stop();
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return false;
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} else {
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return true;
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};
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} else if (event.keyCode === key.TAB && event.type == 'keydown') {
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// Tab completion.
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//Do not trim here because of tooltip
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var pre_cursor = editor.getRange({line:cur.line,ch:0},cur);
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if (pre_cursor.trim() === "") {
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// Don't autocomplete if the part of the line before the cursor
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// is empty. In this case, let CodeMirror handle indentation.
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return false;
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} else if ((pre_cursor.substr(-1) === "("|| pre_cursor.substr(-1) === " ") && that.tooltip_on_tab ) {
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IPython.tooltip.request(that);
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// Prevent the event from bubbling up.
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event.stop();
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// Prevent CodeMirror from handling the tab.
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return true;
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} else {
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event.stop();
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this.completer.startCompletion();
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return true;
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};
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} else if (event.keyCode === key.BACKSPACE && event.type == 'keydown') {
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// If backspace and the line ends with 4 spaces, remove them.
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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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// keypress/keyup also trigger on TAB press, and we don't want to
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// use those to disable tab completion.
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return false;
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};
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return false;
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};
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// Kernel related calls.
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CodeCell.prototype.set_kernel = function (kernel) {
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this.kernel = kernel;
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}
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CodeCell.prototype.execute = function () {
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this.output_area.clear_output(true, true, true);
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this.set_input_prompt('*');
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this.element.addClass("running");
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var callbacks = {
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'execute_reply': $.proxy(this._handle_execute_reply, this),
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'output': $.proxy(this.output_area.handle_output, this.output_area),
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'clear_output': $.proxy(this.output_area.handle_clear_output, this.output_area),
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'cell': this
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};
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var msg_id = this.kernel.execute(this.get_text(), callbacks, {silent: false});
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};
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CodeCell.prototype._handle_execute_reply = function (content) {
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this.set_input_prompt(content.execution_count);
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this.element.removeClass("running");
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// this.dirty = true;
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}
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// Basic cell manipulation.
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CodeCell.prototype.select = function () {
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IPython.Cell.prototype.select.apply(this);
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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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};
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CodeCell.prototype.select_all = function () {
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var start = {line: 0, ch: 0};
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var nlines = this.code_mirror.lineCount();
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var last_line = this.code_mirror.getLine(nlines-1);
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var end = {line: nlines-1, ch: last_line.length};
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this.code_mirror.setSelection(start, end);
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};
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CodeCell.prototype.collapse = function () {
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this.output_area.collapse();
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};
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CodeCell.prototype.expand = function () {
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this.output_area.expand();
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};
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CodeCell.prototype.toggle_output = function () {
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this.output_area.toggle_output();
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};
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CodeCell.prototype.set_input_prompt = function (number) {
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this.input_prompt_number = number;
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var ns = number || " ";
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this.element.find('div.input_prompt').html('In [' + ns + ']:');
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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.get_text = function () {
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return this.code_mirror.getValue();
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};
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CodeCell.prototype.set_text = 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.clear_output = function (stdout, stderr, other) {
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this.output_area.clear_output(stdout, stderr, other);
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};
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// JSON serialization
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CodeCell.prototype.fromJSON = function (data) {
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if (data.cell_type === 'code') {
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if (data.input !== undefined) {
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this.set_text(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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this.output_area.fromJSON(data.outputs);
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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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} else {
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this.expand();
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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_text();
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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 = this.output_area.toJSON();
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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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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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