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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
//============================================================================
/**
* An extendable module that provide base functionnality to create cell for notebook.
* @module IPython
* @namespace IPython
* @submodule CodeCell
*/
/* local util for codemirror */
var posEq = function(a, b) {return a.line == b.line && a.ch == b.ch;}
/**
*
* function to delete until previous non blanking space character
* or first multiple of 4 tabstop.
* @private
*/
CodeMirror.commands.delSpaceToPrevTabStop = function(cm){
var from = cm.getCursor(true), to = cm.getCursor(false), sel = !posEq(from, to);
if (!posEq(from, to)) {cm.replaceRange("", from, to); return}
var cur = cm.getCursor(), line = cm.getLine(cur.line);
var tabsize = cm.getOption('tabSize');
var chToPrevTabStop = cur.ch-(Math.ceil(cur.ch/tabsize)-1)*tabsize;
var from = {ch:cur.ch-chToPrevTabStop,line:cur.line}
var select = cm.getRange(from,cur)
if( select.match(/^\ +$/) != null){
cm.replaceRange("",from,cur)
} else {
cm.deleteH(-1,"char")
}
};
var IPython = (function (IPython) {
"use strict";
var utils = IPython.utils;
var key = IPython.utils.keycodes;
/**
* A Cell conceived to write code.
*
* 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.
* @class CodeCell
* @extends IPython.Cell
*
* @constructor
* @param {Object|null} kernel
* @param {object|undefined} [options]
* @param [options.cm_config] {object} config to pass to CodeMirror
*/
var CodeCell = function (kernel, options) {
this.kernel = kernel || null;
this.code_mirror = null;
this.input_prompt_number = null;
this.collapsed = false;
this.cell_type = "code";
this.last_msg_id = null;
var cm_overwrite_options = {
onKeyEvent: $.proxy(this.handle_codemirror_keyevent,this)
};
options = this.mergeopt(CodeCell, options, {cm_config:cm_overwrite_options});
IPython.Cell.apply(this,[options]);
var that = this;
this.element.focusout(
function() { that.auto_highlight(); }
);
};
CodeCell.options_default = {
cm_config : {
extraKeys: {
"Tab" : "indentMore",
"Shift-Tab" : "indentLess",
"Backspace" : "delSpaceToPrevTabStop",
"Cmd-/" : "toggleComment",
"Ctrl-/" : "toggleComment"
},
mode: 'ipython',
theme: 'ipython',
matchBrackets: true
}
};
CodeCell.prototype = new IPython.Cell();
/**
* @method auto_highlight
*/
CodeCell.prototype.auto_highlight = function () {
this._auto_highlight(IPython.config.cell_magic_highlight)
};
/** @method create_element */
CodeCell.prototype.create_element = function () {
IPython.Cell.prototype.create_element.apply(this, arguments);
var cell = $('<div></div>').addClass('cell border-box-sizing code_cell');
cell.attr('tabindex','2');
this.celltoolbar = new IPython.CellToolbar(this);
var input = $('<div></div>').addClass('input');
var vbox = $('<div/>').addClass('vbox box-flex1')
input.append($('<div/>').addClass('prompt input_prompt'));
vbox.append(this.celltoolbar.element);
var input_area = $('<div/>').addClass('input_area');
this.code_mirror = CodeMirror(input_area.get(0), this.cm_config);
$(this.code_mirror.getInputField()).attr("spellcheck", "false");
vbox.append(input_area);
input.append(vbox);
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);
}
};
/**
* 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.
* @method handle_codemirror_keyevent
*/
CodeCell.prototype.handle_codemirror_keyevent = function (editor, event) {
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){
this.auto_highlight();
}
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
// The second argument says to hide the tooltip if the docstring
// is actually empty
IPython.tooltip.pending(that, true);
} 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) {
return IPython.tooltip.remove_and_cancel_tooltip(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' && event.shiftKey) {
if (editor.somethingSelected()){
var anchor = editor.getCursor("anchor");
var head = editor.getCursor("head");
if( anchor.line != head.line){
return false;
}
}
IPython.tooltip.request(that);
event.stop();
return true;
} else if (event.keyCode === key.TAB && event.type == 'keydown') {
// Tab completion.
//Do not trim here because of tooltip
if (editor.somethingSelected()){return false}
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) === " ") && IPython.config.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 {
// 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;
}
/**
* Execute current code cell to the kernel
* @method execute
*/
CodeCell.prototype.execute = function () {
this.output_area.clear_output();
this.set_input_prompt('*');
this.element.addClass("running");
if (this.last_msg_id) {
this.kernel.clear_callbacks_for_msg(this.last_msg_id);
}
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),
'input_request': $.proxy(this._handle_input_request, this)
};
this.last_msg_id = this.kernel.execute(this.get_text(), callbacks, {silent: false, store_history: true});
};
/**
* @method _handle_execute_reply
* @private
*/
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});
}
/**
* @method _handle_set_next_input
* @private
*/
CodeCell.prototype._handle_set_next_input = function (text) {
var data = {'cell': this, 'text': text}
$([IPython.events]).trigger('set_next_input.Notebook', data);
}
/**
* @method _handle_input_request
* @private
*/
CodeCell.prototype._handle_input_request = function (content) {
this.output_area.append_raw_input(content);
}
// Basic cell manipulation.
CodeCell.prototype.select = function () {
IPython.Cell.prototype.select.apply(this);
this.code_mirror.refresh();
this.code_mirror.focus();
this.auto_highlight();
// 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.collapsed = true;
this.output_area.collapse();
};
CodeCell.prototype.expand = function () {
this.collapsed = false;
this.output_area.expand();
};
CodeCell.prototype.toggle_output = function () {
this.collapsed = Boolean(1 - this.collapsed);
this.output_area.toggle_output();
};
CodeCell.prototype.toggle_output_scroll = function () {
this.output_area.toggle_scroll();
};
CodeCell.input_prompt_classical = function (prompt_value, lines_number) {
var ns = prompt_value || " ";
return 'In [' + ns + ']:'
};
CodeCell.input_prompt_continuation = function (prompt_value, lines_number) {
var html = [CodeCell.input_prompt_classical(prompt_value, lines_number)];
for(var i=1; i < lines_number; i++){html.push(['...:'])};
return html.join('</br>')
};
CodeCell.input_prompt_function = CodeCell.input_prompt_classical;
CodeCell.prototype.set_input_prompt = function (number) {
var nline = 1
if( this.code_mirror != undefined) {
nline = this.code_mirror.lineCount();
}
this.input_prompt_number = number;
var prompt_html = CodeCell.input_prompt_function(this.input_prompt_number, nline);
this.element.find('div.input_prompt').html(prompt_html);
};
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 && cursor.ch === 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) && cursor.ch === this.code_mirror.getLine(cursor.line).length) {
return true;
} else {
return false;
}
};
CodeCell.prototype.clear_output = function (wait) {
this.output_area.clear_output(wait);
};
// JSON serialization
CodeCell.prototype.fromJSON = function (data) {
IPython.Cell.prototype.fromJSON.apply(this, arguments);
if (data.cell_type === 'code') {
if (data.input !== undefined) {
this.set_text(data.input);
// make this value the starting point, so that we can only undo
// to this state, instead of a blank cell
this.code_mirror.clearHistory();
this.auto_highlight();
}
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 = IPython.Cell.prototype.toJSON.apply(this);
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));
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