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codecell.js
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codecell.js
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//----------------------------------------------------------------------------
// Copyright (C) 2008-2011 The IPython Development Team
//
// Distributed under the terms of the BSD License. The full license is in
// the file COPYING, distributed as part of this software.
//----------------------------------------------------------------------------
//============================================================================
// CodeCell
//============================================================================
var IPython = (function (IPython) {
"use strict";
var utils = IPython.utils;
var key = IPython.utils.keycodes;
var CodeCell = function (kernel) {
// The kernel doesn't have to be set at creation time, in that case
// it will be null and set_kernel has to be called later.
this.kernel = kernel || null;
this.code_mirror = null;
this.input_prompt_number = null;
this.tooltip_on_tab = true;
IPython.Cell.apply(this, arguments);
};
CodeCell.prototype = new IPython.Cell();
CodeCell.prototype.create_element = function () {
var cell = $('<div></div>').addClass('cell border-box-sizing code_cell vbox');
cell.attr('tabindex','2');
var input = $('<div></div>').addClass('input hbox');
input.append($('<div/>').addClass('prompt input_prompt'));
var input_area = $('<div/>').addClass('input_area box-flex1');
this.code_mirror = CodeMirror(input_area.get(0), {
indentUnit : 4,
mode: 'python',
theme: 'ipython',
readOnly: this.read_only,
onKeyEvent: $.proxy(this.handle_codemirror_keyevent,this)
});
input.append(input_area);
var output = $('<div></div>');
cell.append(input).append(output);
this.element = cell;
this.output_area = new IPython.OutputArea(output, true);
// construct a completer only if class exist
// otherwise no print view
if (IPython.Completer !== undefined)
{
this.completer = new IPython.Completer(this);
}
};
CodeCell.prototype.handle_codemirror_keyevent = function (editor, event) {
// This method gets called in CodeMirror's onKeyDown/onKeyPress
// handlers and is used to provide custom key handling. Its return
// value is used to determine if CodeMirror should ignore the event:
// true = ignore, false = don't ignore.
if (this.read_only){
return false;
}
var that = this;
// whatever key is pressed, first, cancel the tooltip request before
// they are sent, and remove tooltip if any, except for tab again
if (event.type === 'keydown' && event.which != key.TAB ) {
IPython.tooltip.remove_and_cancel_tooltip();
};
var cur = editor.getCursor();
if (event.keyCode === key.ENTER && (event.shiftKey || event.ctrlKey)) {
// Always ignore shift-enter in CodeMirror as we handle it.
return true;
} else if (event.which === 40 && event.type === 'keypress' && IPython.tooltip.time_before_tooltip >= 0) {
// triger on keypress (!) otherwise inconsistent event.which depending on plateform
// browser and keyboard layout !
// Pressing '(' , request tooltip, don't forget to reappend it
IPython.tooltip.pending(that);
} else if (event.which === key.UPARROW && event.type === 'keydown') {
// If we are not at the top, let CM handle the up arrow and
// prevent the global keydown handler from handling it.
if (!that.at_top()) {
event.stop();
return false;
} else {
return true;
};
} else if (event.which === key.ESC) {
IPython.tooltip.remove_and_cancel_tooltip(true);
return true;
} else if (event.which === key.DOWNARROW && event.type === 'keydown') {
// If we are not at the bottom, let CM handle the down arrow and
// prevent the global keydown handler from handling it.
if (!that.at_bottom()) {
event.stop();
return false;
} else {
return true;
};
} else if (event.keyCode === key.TAB && event.type == 'keydown') {
// Tab completion.
//Do not trim here because of tooltip
var pre_cursor = editor.getRange({line:cur.line,ch:0},cur);
if (pre_cursor.trim() === "") {
// Don't autocomplete if the part of the line before the cursor
// is empty. In this case, let CodeMirror handle indentation.
return false;
} else if ((pre_cursor.substr(-1) === "("|| pre_cursor.substr(-1) === " ") && that.tooltip_on_tab ) {
IPython.tooltip.request(that);
// Prevent the event from bubbling up.
event.stop();
// Prevent CodeMirror from handling the tab.
return true;
} else {
event.stop();
this.completer.startCompletion();
return true;
};
} else if (event.keyCode === key.BACKSPACE && event.type == 'keydown') {
// If backspace and the line ends with 4 spaces, remove them.
var line = editor.getLine(cur.line);
var ending = line.slice(-4);
if (ending === ' ') {
editor.replaceRange('',
{line: cur.line, ch: cur.ch-4},
{line: cur.line, ch: cur.ch}
);
event.stop();
return true;
} else {
return false;
};
} else {
// keypress/keyup also trigger on TAB press, and we don't want to
// use those to disable tab completion.
return false;
};
return false;
};
// Kernel related calls.
CodeCell.prototype.set_kernel = function (kernel) {
this.kernel = kernel;
}
CodeCell.prototype.execute = function () {
this.output_area.clear_output(true, true, true);
this.set_input_prompt('*');
this.element.addClass("running");
var callbacks = {
'execute_reply': $.proxy(this._handle_execute_reply, this),
'output': $.proxy(this.output_area.handle_output, this.output_area),
'clear_output': $.proxy(this.output_area.handle_clear_output, this.output_area),
'set_next_input': $.proxy(this._handle_set_next_input, this)
};
var msg_id = this.kernel.execute(this.get_text(), callbacks, {silent: false});
};
CodeCell.prototype._handle_execute_reply = function (content) {
this.set_input_prompt(content.execution_count);
this.element.removeClass("running");
$([IPython.events]).trigger('set_dirty.Notebook', {'value': true});
}
CodeCell.prototype._handle_set_next_input = function (text) {
var data = {'cell': this, 'text': text}
$([IPython.events]).trigger('set_next_input.Notebook', data);
}
// Basic cell manipulation.
CodeCell.prototype.select = function () {
IPython.Cell.prototype.select.apply(this);
this.code_mirror.refresh();
this.code_mirror.focus();
// We used to need an additional refresh() after the focus, but
// it appears that this has been fixed in CM. This bug would show
// up on FF when a newly loaded markdown cell was edited.
};
CodeCell.prototype.select_all = function () {
var start = {line: 0, ch: 0};
var nlines = this.code_mirror.lineCount();
var last_line = this.code_mirror.getLine(nlines-1);
var end = {line: nlines-1, ch: last_line.length};
this.code_mirror.setSelection(start, end);
};
CodeCell.prototype.collapse = function () {
this.output_area.collapse();
};
CodeCell.prototype.expand = function () {
this.output_area.expand();
};
CodeCell.prototype.toggle_output = function () {
this.output_area.toggle_output();
};
CodeCell.prototype.toggle_output_scroll = function () {
this.output_area.toggle_scroll();
};
CodeCell.prototype.set_input_prompt = function (number) {
this.input_prompt_number = number;
var ns = number || " ";
this.element.find('div.input_prompt').html('In [' + ns + ']:');
};
CodeCell.prototype.clear_input = function () {
this.code_mirror.setValue('');
};
CodeCell.prototype.get_text = function () {
return this.code_mirror.getValue();
};
CodeCell.prototype.set_text = function (code) {
return this.code_mirror.setValue(code);
};
CodeCell.prototype.at_top = function () {
var cursor = this.code_mirror.getCursor();
if (cursor.line === 0) {
return true;
} else {
return false;
}
};
CodeCell.prototype.at_bottom = function () {
var cursor = this.code_mirror.getCursor();
if (cursor.line === (this.code_mirror.lineCount()-1)) {
return true;
} else {
return false;
}
};
CodeCell.prototype.clear_output = function (stdout, stderr, other) {
this.output_area.clear_output(stdout, stderr, other);
};
// JSON serialization
CodeCell.prototype.fromJSON = function (data) {
if (data.cell_type === 'code') {
if (data.input !== undefined) {
this.set_text(data.input);
}
if (data.prompt_number !== undefined) {
this.set_input_prompt(data.prompt_number);
} else {
this.set_input_prompt();
};
this.output_area.fromJSON(data.outputs);
if (data.collapsed !== undefined) {
if (data.collapsed) {
this.collapse();
} else {
this.expand();
};
};
};
};
CodeCell.prototype.toJSON = function () {
var data = {};
data.input = this.get_text();
data.cell_type = 'code';
if (this.input_prompt_number) {
data.prompt_number = this.input_prompt_number;
};
var outputs = this.output_area.toJSON();
data.outputs = outputs;
data.language = 'python';
data.collapsed = this.collapsed;
return data;
};
IPython.CodeCell = CodeCell;
return IPython;
}(IPython));