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//----------------------------------------------------------------------------
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// Copyright (C) 2012 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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// CellToolbar
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//============================================================================
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/**
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* A Module to control the per-cell toolbar.
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* @module IPython
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* @namespace IPython
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* @submodule CellToolbar
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*/
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var IPython = (function (IPython) {
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"use strict";
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/**
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* @constructor
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* @class CellToolbar
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* @param {The cell to attach the metadata UI to} cell
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*/
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var CellToolbar = function (cell) {
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CellToolbar._instances.push(this);
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this.inner_element = $('<div/>');
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this.cell = cell;
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this.element = $('<div/>').addClass('celltoolbar')
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.append(this.inner_element)
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this.rebuild();
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return this;
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};
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CellToolbar.dropdown_preset_element = $('<select/>')
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.addClass('ui-widget ui-widget-content')
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.attr('id', 'celltoolbar_selector')
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.append($('<option/>').attr('value', '').text('-'))
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CellToolbar.dropdown_preset_element.change(function(){
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var val = CellToolbar.dropdown_preset_element.val()
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if(val ==''){
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$('body').removeClass('celltoolbar-on')
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} else {
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$('body').addClass('celltoolbar-on')
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CellToolbar.set_preset(val)
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}
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})
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/**
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* Class variable that should contain a dict of all availlable callback
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* we need to think of wether or not we allow nested namespace
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* @property _callback_dict
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* @private
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*/
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CellToolbar._callback_dict = {};
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/**
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* Class variable that should contain the reverse order list of the button
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* to add to the toolbar of each cell
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* @property _ui_controls_list
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* @private
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*/
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CellToolbar._ui_controls_list = [];
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/**
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* keep a list of all instances to
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* be able to llop over them...
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* but how to 'destroy' them ?
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* have to think about it...
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* or loop over the cells, and find their CellToolbar instances.
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* @private
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* @property _instances
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*/
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CellToolbar._instances =[]
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/**
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* keep a list of all the availlabel presets for the toolbar
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* @private
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* @property _presets
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*/
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CellToolbar._presets ={}
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// this is by design not a prototype.
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/**
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* Register a callback to create an UI element in a cell toolbar.
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* @method register_callback
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* @param name {String} name to use to refer to the callback. It is advised to use a prefix with the name
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* for easier sorting and avoid collision
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* @param callback {function(div, cell)} callback that will be called to generate the ui element
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*
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*
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* The callback will receive the following element :
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*
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* * a div in which to add element.
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* * the cell it is responsable from
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*
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* @example
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*
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* Example that create callback for a button that toggle between `true` and `false` label,
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* with the metadata under the key 'foo' to reflect the status of the button.
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*
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* // first param reference to a DOM div
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* // second param reference to the cell.
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* var toggle = function(div, cell) {
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* var button_container = $(div)
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*
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* // let's create a button that show the current value of the metadata
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* var button = $('<div/>').button({label:String(cell.metadata.foo)});
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*
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* // On click, change the metadata value and update the button label
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* button.click(function(){
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* var v = cell.metadata.foo;
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* cell.metadata.foo = !v;
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* button.button("option", "label", String(!v));
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* })
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*
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* // add the button to the DOM div.
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* button_container.append(button);
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* }
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*
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* // now we register the callback under the name `foo` to give the
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* // user the ability to use it later
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* CellToolbar.register_callback('foo', toggle);
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*/
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CellToolbar.register_callback = function(name, callback){
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// what do we do if name already exist ?
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CellToolbar._callback_dict[name] = callback;
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};
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/**
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* Register a preset of UI element in a cell toolbar.
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* Not supported Yet.
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* @method register_preset
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* @param name {String} name to use to refer to the preset. It is advised to use a prefix with the name
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* for easier sorting and avoid collision
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* @param preset_list {List of String} reverse order of the button in the toolbar. Each String of the list
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* should correspond to a name of a registerd callback.
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*
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* @private
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* @example
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*
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* CellToolbar.register_callback('foo.c1', function(div, cell){...});
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* CellToolbar.register_callback('foo.c2', function(div, cell){...});
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* CellToolbar.register_callback('foo.c3', function(div, cell){...});
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* CellToolbar.register_callback('foo.c4', function(div, cell){...});
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* CellToolbar.register_callback('foo.c5', function(div, cell){...});
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*
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* CellToolbar.register_preset('foo.foo_preset1', ['foo.c1', 'foo.c2', 'foo.c5'])
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* CellToolbar.register_preset('foo.foo_preset2', ['foo.c4', 'foo.c5'])
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*/
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CellToolbar.register_preset = function(name, preset_list){
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CellToolbar._presets[name] = preset_list
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CellToolbar.dropdown_preset_element.append(
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$('<option/>').attr('value', name).text(name)
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)
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}
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/**
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* set an UI preset from `register_preset`
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* @method set_preset
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* @param preset_name {String} string corresponding to the preset name
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*
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* @static
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* @private
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* @example
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*
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* CellToolbar.set_preset('foo.foo_preset1');
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*/
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CellToolbar.set_preset= function(preset_name){
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var preset = CellToolbar._presets[preset_name];
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if(preset != undefined){
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CellToolbar._ui_controls_list = preset;
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CellToolbar.rebuild_all();
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}
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}
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// this is by design not a prototype.
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/**
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* This should be called on the class and not on a instance as it will trigger
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* rebuild of all the instances.
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* @method rebuild_all
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* @static
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*
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*/
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CellToolbar.rebuild_all = function(){
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for(var i in CellToolbar._instances){
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CellToolbar._instances[i].rebuild();
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}
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}
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/**
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* Rebuild all the button on the toolbar to update it's state.
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* @method rebuild
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*/
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CellToolbar.prototype.rebuild = function(){
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// strip evrything from the div
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// which is probabli metainner.
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// or this.element.
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this.inner_element.empty();
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var cdict = CellToolbar._callback_dict;
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var preset = CellToolbar._ui_controls_list;
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// Yes we iterate on the class varaible, not the instance one.
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for ( var index in CellToolbar._ui_controls_list){
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var local_div = $('<div/>').addClass('button_container');
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// Note,
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// do this the other way, wrap in try/catch and don't append if any errors.
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this.inner_element.append(local_div)
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cdict[preset[index]](local_div, this.cell)
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}
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}
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/**
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*/
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CellToolbar.utils = {};
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/**
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* A utility function to generate bindings between a checkbox and cell/metadata
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* @method utils.checkbox_ui_generator
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* @static
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*
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* @param name {string} Label in front of the checkbox
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* @param setter {function( cell, newValue )}
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* A setter method to set the newValue
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* @param getter {function( cell )}
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* A getter methods which return the current value.
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*
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* @return callback {function( div, cell )} Callback to be passed to `register_callback`
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*
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* @example
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*
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* An exmple that bind the subkey `slideshow.isSectionStart` to a checkbox with a `New Slide` label
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*
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* var newSlide = CellToolbar.utils.checkbox_ui_generator('New Slide',
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* // setter
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* function(cell, value){
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* // we check that the slideshow namespace exist and create it if needed
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* if (cell.metadata.slideshow == undefined){cell.metadata.slideshow = {}}
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* // set the value
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* cell.metadata.slideshow.isSectionStart = value
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* },
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* //geter
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* function(cell){ var ns = cell.metadata.slideshow;
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* // if the slideshow namespace does not exist return `undefined`
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* // (will be interpreted as `false` by checkbox) otherwise
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* // return the value
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* return (ns == undefined)? undefined: ns.isSectionStart
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* }
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* );
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*
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* CellToolbar.register_callback('newSlide', newSlide);
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*
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*/
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CellToolbar.utils.checkbox_ui_generator = function(name, setter, getter){
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return function(div, cell) {
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var button_container = $(div)
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var chkb = $('<input/>').attr('type', 'checkbox');
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var lbl = $('<label/>').append($('<span/>').text(name).css('font-size', '77%'));
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lbl.append(chkb);
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chkb.attr("checked", getter(cell));
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chkb.click(function(){
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var v = getter(cell);
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setter(cell, !v);
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chkb.attr("checked", !v);
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})
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button_container.append($('<div/>').append(lbl));
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}
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}
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/**
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* A utility function to generate bindings between a dropdown list cell
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* @method utils.select_ui_generator
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* @static
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*
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* @param list_list {list of sublist} List of sublist of metadata value and name in the dropdown list.
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* subslit shoud contain 2 element each, first a string that woul be displayed in the dropdown list,
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* and second the corresponding value to be passed to setter/return by getter.
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* @param setter {function( cell, newValue )}
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* A setter method to set the newValue
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* @param getter {function( cell )}
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* A getter methods which return the current value of the metadata.
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* @param [label=""] {String} optionnal label for the dropdown menu
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*
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* @return callback {function( div, cell )} Callback to be passed to `register_callback`
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*
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* @example
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*
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* var select_type = CellToolbar.utils.select_ui_generator([
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* ["-" , undefined ],
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* ["Header Slide" , "header_slide" ],
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* ["Slide" , "slide" ],
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* ["Fragment" , "fragment" ],
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* ["Skip" , "skip" ],
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* ],
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* // setter
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* function(cell, value){
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* // we check that the slideshow namespace exist and create it if needed
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* if (cell.metadata.slideshow == undefined){cell.metadata.slideshow = {}}
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* // set the value
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* cell.metadata.slideshow.slide_type = value
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* },
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* //geter
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* function(cell){ var ns = cell.metadata.slideshow;
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* // if the slideshow namespace does not exist return `undefined`
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* // (will be interpreted as `false` by checkbox) otherwise
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* // return the value
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* return (ns == undefined)? undefined: ns.slide_type
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* }
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* CellToolbar.register_callback('slideshow.select', select_type);
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*
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*/
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CellToolbar.utils.select_ui_generator = function(list_list, setter, getter, label){
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label= label? label: "";
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return function(div, cell) {
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var button_container = $(div)
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var lbl = $("<label/>").append($('<span/>').text(label).css('font-size', '77%'));
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var select = $('<select/>');
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for(var itemn in list_list){
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var opt = $('<option/>');
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opt.attr('value', list_list[itemn][1])
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opt.text(list_list[itemn][0])
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select.append(opt);
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}
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select.val(getter(cell));
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select.change(function(){
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setter(cell, select.val());
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});
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button_container.append($('<div/>').append(lbl).append(select));
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}
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};
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IPython.CellToolbar = CellToolbar;
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return IPython;
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}(IPython));
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