create metadata-dropdowm-menu generator

IPython/frontend/html/notebook/static/js/metaui.js

@@ -1,376 +1,443 b''
 //----------------------------------------------------------------------------
 //  Copyright (C) 2012  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.
 //----------------------------------------------------------------------------
 
 //============================================================================
 // MetaUI
 //============================================================================
 
 
 /**
  * A Module to control the per-cell toolbar.
  * @module IPython
  * @namespace IPython
  * @submodule MetaUI
  */
 var IPython = (function (IPython) {
     "use strict";
 
 
     /**
      * @constructor
      * @class MetaUI
      * @param {The cell to attach the metadata UI to} cell
      */
     var MetaUI = function (cell) {
         MetaUI._instances.push(this);
         this.metainner = $('<div/>');
         this.cell = cell;
         this.element = $('<div/>').addClass('metaedit')
                 .append(this.metainner)
         this.rebuild();
         return this;
     };
 
     /**
      * Class variable that should contain a dict of all availlable callback
      * we need to think of wether or not we allow nested namespace
      * @property _callback_dict
      * @private
      */
     MetaUI._callback_dict = {};
 
     /**
      * Class variable that should contain the reverse order list of the button
      * to add to the toolbar of each cell
      * @property _button_list
      * @private
      */
     MetaUI._button_list = [];
 
     /**
      * keep a list of all instances to
      * be able to llop over them...
      * but how to 'destroy' them ?
      * have to think about it...
      * or loop over the cells, and find their MetaUI instances.
      * @private
      * @property _instances
      */
     MetaUI._instances =[]
 
     /**
      * keep a list of all the availlabel presets for the toolbar
      * @private
      * @property _presets
      */
     MetaUI._presets ={}
 
     // this is by design not a prototype.
     /**
      * Register a callback to create an UI element in a cell toolbar.
      * @method register_callback
      * @param name {String} name to use to refer to the callback. It is advised to use a prefix with the name
      * for easier sorting and avoid collision
      * @param  callback {function(div, cell)} callback that will be called to generate the ui element
      *
      *
      * The callback will receive the following element :
      *
      *    * a div in which to add element.
      *    * the cell it is responsable from
      *
      * @example
      *
      * Example that create callback for a button that toggle between `true` and `false` label,
      * with the metadata under the key 'foo' to reflect the status of the button.
      *
      *      // first param reference to a DOM div
      *      // second param reference to the cell.
      *      var toggle =  function(div, cell) {
      *          var button_container = $(div)
      *
      *          // let's create a button that show the  current value of the metadata
      *          var button = $('<div/>').button({label:String(cell.metadata.foo)});
      *
      *          // On click, change the metadata value and update the button label
      *          button.click(function(){
      *                      var v = cell.metadata.foo;
      *                      cell.metadata.foo = !v;
      *                      button.button("option","label",String(!v));
      *                  })
      *
      *          // add the button to the DOM div.
      *          button_container.append(button);
      *      }
      *
      *      // now we register the callback under the name `foo` to give the
      *      // user the ability to use it later
      *      MetaUI.register_callback('foo',toggle);
      */
     MetaUI.register_callback = function(name, callback){
         // what do we do if name already exist ?
         MetaUI._callback_dict[name] = callback;
     };
 
     /**
      * Register a preset of UI element in a cell toolbar.
      * Not supported Yet.
      * @method register_preset
      * @param name {String} name to use to refer to the preset. It is advised to use a prefix with the name
      * for easier sorting and avoid collision
      * @param  preset_list {List of String} reverse order of the button in the toolbar. Each String of the list
      *          should correspond to a name of a registerd callback.
      *
      * @private
      * @example
      *
      *      MetaUI.register_callback('foo.c1',function(div,cell){...});
      *      MetaUI.register_callback('foo.c2',function(div,cell){...});
      *      MetaUI.register_callback('foo.c3',function(div,cell){...});
      *      MetaUI.register_callback('foo.c4',function(div,cell){...});
      *      MetaUI.register_callback('foo.c5',function(div,cell){...});
      *
      *      MetaUI.register_preset('foo.foo_preset1',['foo.c1','foo.c2','foo.c5'])
      *      MetaUI.register_preset('foo.foo_preset2',['foo.c4','foo.c5'])
      */
     MetaUI.register_preset = function(name, preset_list){
         MetaUI._presets[name] = preset_list
     }
     /**
      * set an UI preset from `register_preset`
      * @method set_preset
      * @param preset_name {String} string corresponding to the preset name
      *
      * @static
      * @private
      * @example
      *
      *      MetaUI.set_preset('foo.foo_preset1');
      */
     MetaUI.set_preset= function(preset_name){
         var preset = MetaUI._presets[preset_name];
 
         if(preset != undefined){
             MetaUI._button_list = preset;
             MetaUI.rebuild_all();
         }
     }
 
     // this is by design not a prototype.
     /**
      * This should be called on the class and not on a instance as it will trigger
      * rebuild of all the instances.
      * @method rebuild_all
      * @static
      *
      */
     MetaUI.rebuild_all = function(){
         for(var i in MetaUI._instances){
             MetaUI._instances[i].rebuild();
         }
     }
 
     /**
      * Rebuild all the button on the toolbar to update it's state.
      * @method rebuild
      */
     MetaUI.prototype.rebuild = function(){
         // strip evrything from the div
         // which is probabli metainner.
         // or this.element.
         this.metainner.empty();
         //this.add_raw_edit_button()
 
 
         var cdict = MetaUI._callback_dict;
         var preset = MetaUI._button_list;
         // Yes we iterate on the class varaible, not the instance one.
         for ( var index in MetaUI._button_list){
             var local_div = $('<div/>').addClass('button_container');
             // Note,
             // do this the other way, wrap in try/catch and don't append if any errors.
             this.metainner.append(local_div)
             cdict[preset[index]](local_div,this.cell)
         }
 
     }
 
     var raw_edit = function(cell){
 
         var md = cell.metadata
 
         var textarea = $('<textarea/>')
             .attr('rows','13')
             .attr('cols','75')
             .attr('name','metadata')
             .text(JSON.stringify(md, null,4)||'');
         var dialogform = $('<div/>').attr('title','Edit the metadata')
             .append(
                 $('<form/>').append(
                     $('<fieldset/>').append(
                         $('<label/>')
                         .attr('for','metadata')
                         .text("Metadata (I know what I'm dooing and I won't complain if it breaks my notebook)")
                         )
                         .append($('<br/>'))
                         .append(
                             textarea
                         )
                     )
             );
         var editor = CodeMirror.fromTextArea(textarea[0], {
             lineNumbers: true,
             matchBrackets: true,
         });
         $(dialogform).dialog({
                 autoOpen: true,
                 height: 300,
                 width: 650,
                 modal: true,
                 buttons: {
                     "Ok": function() {
                         //validate json and set it
                         try {
                            var json = JSON.parse(editor.getValue());
                            cell.metadata = json;
                            $( this ).dialog( "close" );
                         }
                         catch(e)
                         {
                            alert('invalid json');
                         }
                     },
                     Cancel: function() {
                         $( this ).dialog( "close" );
                     }
                 },
                 close: function() {
                     //cleanup on close
                     $(this).remove();
                 }
         });
         editor.refresh();
     }
 
     var add_raw_edit_button = function(div, cell) {
         var button_container = $(div)
         var button = $('<div/>').button({label:'Raw Edit'})
                 .click(function(){raw_edit(cell); return false;})
         button_container.append(button);
     }
 
     MetaUI.register_callback('example.rawedit',add_raw_edit_button);
     var example_preset = []
     example_preset.push('example.rawedit');
 
 
     var simple_button = function(div, cell) {
         var button_container = $(div);
         var button = $('<div/>').button({icons:{primary:'ui-icon-locked'}});
         var fun = function(value){
                 try{
                     if(value){
                         cell.code_mirror.setOption('readOnly','nocursor')
                         button.button('option','icons',{primary:'ui-icon-locked'})
                     } else {
                         cell.code_mirror.setOption('readOnly','false')
                         button.button('option','icons',{primary:'ui-icon-unlocked'})
                     }
                 } catch(e){}
 
         }
             fun(cell.metadata.ro)
             button.click(function(){
                     var v = cell.metadata.ro;
                     var locked = !v;
                     cell.metadata.ro = locked;
                     fun(locked)
                     })
                 .css('height','16px')
                 .css('width','35px');
         button_container.append(button);
     }
 
     MetaUI.register_callback('example.lock',simple_button);
     example_preset.push('example.lock');
 
     var toggle_test =  function(div, cell) {
         var button_container = $(div)
         var button = $('<div/>').button({label:String(cell.metadata.foo)});
         button.click(function(){
                     var v = cell.metadata.foo;
                     cell.metadata.foo = !v;
                     button.button("option","label",String(!v));
                 })
        button_container.append(button);
     }
 
     MetaUI.register_callback('example.toggle',toggle_test);
     example_preset.push('example.toggle');
 
     /**
      */
     MetaUI.utils = {};
 
     /**
      * A utility function to generate bindings between a checkbox and metadata
      * @method utils.checkbox_ui_generator
      * @static
      *
      * @param name {string} Label in front of the checkbox
-     * @param setter {function( metadata_dict, newValue )} A setter method to set the newValue of the metadata dictionnary
-     * @param getter {function( metadata )} A getter methods which return the current value of the metadata.
+     * @param setter {function( metadata_dict, newValue )}
+     *        A setter method to set the newValue of the metadata dictionnary
+     * @param getter {function( metadata )}
+     *        A getter methods which return the current value of the metadata.
      *
      * @return callback {function( div, cell )} Callback to be passed to `register_callback`
      *
      * @example
      *
      * An exmple that bind the subkey `slideshow.isSectionStart` to a checkbox with a `New Slide` label
      *
      *     var newSlide = MetaUI.utils.checkbox_ui_generator('New Slide',
      *          // setter
      *          function(metadata,value){
      *              // we check that the slideshow namespace exist and create it if needed
      *              if (metadata.slideshow == undefined){metadata.slideshow = {}}
      *              // set the value
      *              metadata.slideshow.isSectionStart = value
      *              },
      *          //geter
      *          function(metadata){ var ns = metadata.slideshow;
      *              // if the slideshow namespace does not exist return `undefined`
      *              // (will be interpreted as `false` by checkbox) otherwise
      *              // return the value
      *              return (ns == undefined)? undefined: ns.isSectionStart
      *              }
      *      );
      *
      *      MetaUI.register_callback('newSlide', newSlide);
      *
      */
     MetaUI.utils.checkbox_ui_generator = function(name,setter,getter){
          return function(div, cell) {
             var button_container = $(div)
 
             var chkb = $('<input/>').attr('type','checkbox');
             var lbl = $('<label/>').append($('<span/>').text(name).css('font-size','77%'));
             lbl.append(chkb);
             chkb.attr("checked",getter(cell.metadata));
 
             chkb.click(function(){
                         var v = getter(cell.metadata);
                         setter(cell.metadata,!v);
                         chkb.attr("checked",!v);
                     })
            button_container.append($('<div/>').append(lbl));
 
         }
     }
 
+    /**
+     * A utility function to generate bindings between a dropdown list and metadata
+     * @method utils.select_ui_generator
+     * @static
+     *
+     * @param list_list {list of sublist} List of sublist of metadata value and name in the dropdown list.
+     *        subslit shoud contain 2 element each, first a string that woul be displayed in the dropdown list,
+     *        and second the corresponding value for the metadata to be passed to setter/return by getter.
+     * @param setter {function( metadata_dict, newValue )}
+     *        A setter method to set the newValue of the metadata dictionnary
+     * @param getter {function( metadata )}
+     *        A getter methods which return the current value of the metadata.
+     * @param [label=""] {String} optionnal label for the dropdown menu
+     *
+     * @return callback {function( div, cell )} Callback to be passed to `register_callback`
+     *
+     * @example
+     *
+     *      var select_type = MetaUI.utils.select_ui_generator([
+     *              ["-"            ,undefined      ],
+     *              ["Header Slide" ,"header_slide" ],
+     *              ["Slide"        ,"slide"        ],
+     *              ["Fragment"     ,"fragment"     ],
+     *              ["Skip"         ,"skip"         ],
+     *              ],
+     *              // setter
+     *              function(metadata,value){
+     *                  // we check that the slideshow namespace exist and create it if needed
+     *                  if (metadata.slideshow == undefined){metadata.slideshow = {}}
+     *                  // set the value
+     *                  metadata.slideshow.slide_type = value
+     *                  },
+     *              //geter
+     *              function(metadata){ var ns = metadata.slideshow;
+     *                  // if the slideshow namespace does not exist return `undefined`
+     *                  // (will be interpreted as `false` by checkbox) otherwise
+     *                  // return the value
+     *                  return (ns == undefined)? undefined: ns.slide_type
+     *                  }
+     *      MetaUI.register_callback('slideshow.select',select_type);
+     *
+     */
+    MetaUI.utils.select_ui_generator = function(list_list,setter, getter, label){
+        label= label? label: "";
+        return function(div, cell) {
+            var button_container = $(div)
+            var lbl = $("<label/>").append($('<span/>').text(label).css('font-size','77%'));
+            var select = $('<select/>');
+            for(var itemn in list_list){
+                var opt = $('<option/>');
+                        opt.attr('value',list_list[itemn][1])
+                        opt.text(list_list[itemn][0])
+                select.append(opt);
+            }
+            select.val(getter(cell.metadata));
+
+            select.change(function(){
+                        setter(cell.metadata,select.val());
+                    });
+            button_container.append($('<div/>').append(lbl).append(select));
+
+        }
+    };
+
+
     IPython.MetaUI = MetaUI;
 
     return IPython;
 }(IPython));