File: datatable/js/message.js
/**
Adds support for a message container to appear in the table. This can be used
to indicate loading progress, lack of records, or any other communication
needed.
@module datatable
@submodule datatable-message
@since 3.5.0
**/
var Message;
/**
_API docs for this extension are included in the DataTable class._
Adds support for a message container to appear in the table. This can be used
to indicate loading progress, lack of records, or any other communication
needed.
Features added to `Y.DataTable`, and made available for custom classes at
`Y.DataTable.Message`.
@class DataTable.Message
@for DataTable
@since 3.5.0
**/
Y.namespace('DataTable').Message = Message = function () {};
Message.ATTRS = {
/**
Enables the display of messages in the table. Setting this to false will
prevent the message Node from being created and `showMessage` from doing
anything.
@attribute showMessages
@type {Boolean}
@default true
@since 3.5.0
**/
showMessages: {
value: true,
validator: Y.Lang.isBoolean
}
};
Y.mix(Message.prototype, {
/**
Template used to generate the node that will be used to report messages.
@property MESSAGE_TEMPLATE
@type {String}
@default <tbody class="{className}"><td class="{contentClass}" colspan="{colspan}"></td></tbody>
@since 3.5.0
**/
MESSAGE_TEMPLATE: '<tbody class="{className}"><tr><td class="{contentClass}" colspan="{colspan}"></td></tr></tbody>',
/**
Hides the message node.
@method hideMessage
@return {DataTable}
@chainable
@since 3.5.0
**/
hideMessage: function () {
this.get('boundingBox').removeClass(
this.getClassName('message', 'visible'));
return this;
},
/**
Display the message node and set its content to `message`. If there is a
localized `strings` entry for the value of `message`, that string will be
used.
@method showMessage
@param {String} message The message name or message itself to display
@return {DataTable}
@chainable
@since 3.5.0
**/
showMessage: function (message) {
var content = this.getString(message) || message;
if (!this._messageNode) {
this._initMessageNode();
}
if (this.get('showMessages')) {
if (content) {
this._messageNode.one(
'.' + this.getClassName('message', 'content'))
.setHTML(content);
this.get('boundingBox').addClass(
this.getClassName('message','visible'));
} else {
// TODO: is this right?
// If no message provided, remove the message node.
this.hideMessage();
}
}
return this;
},
//--------------------------------------------------------------------------
// Protected methods
//--------------------------------------------------------------------------
/**
Updates the colspan of the `<td>` used to display the messages.
@method _afterMessageColumnsChange
@param {EventFacade} e The columnsChange event
@protected
@since 3.5.0
**/
_afterMessageColumnsChange: function () {
var contentNode;
if (this._messageNode) {
contentNode = this._messageNode.one(
'.' + this.getClassName('message', 'content'));
if (contentNode) {
// FIXME: This needs to become a class extension plus a view or
// plugin for the table view.
contentNode.set('colSpan', this._displayColumns.length);
}
}
},
/**
Relays to `_uiSetMessage` to hide or show the message node.
@method _afterMessageDataChange
@param {EventFacade} e The dataChange event
@protected
@since 3.5.0
**/
_afterMessageDataChange: function () {
this._uiSetMessage();
},
/**
Removes the message node if `showMessages` is `false`, or relays to
`_uiSetMessage` if `true`.
@method _afterShowMessagesChange
@param {EventFacade} e The showMessagesChange event
@protected
@since 3.5.0
**/
_afterShowMessagesChange: function (e) {
if (e.newVal) {
this._uiSetMessage(e);
} else if (this._messageNode) {
this.get('boundingBox').removeClass(
this.getClassName('message', 'visible'));
this._messageNode.remove().destroy(true);
this._messageNode = null;
}
},
/**
Binds the events necessary to keep the message node in sync with the current
table and configuration state.
@method _bindMessageUI
@protected
@since 3.5.0
**/
_bindMessageUI: function () {
this.after(['dataChange', '*:add', '*:remove', '*:reset'],
Y.bind('_afterMessageDataChange', this));
this.after('columnsChange', Y.bind('_afterMessageColumnsChange', this));
this.after('showMessagesChange',
Y.bind('_afterShowMessagesChange', this));
},
/**
Merges in the message related strings and hooks into the rendering cycle to
also render and bind the message node.
@method initializer
@protected
@since 3.5.0
**/
initializer: function () {
this._initMessageStrings();
if (this.get('showMessages')) {
this.after('table:renderBody', Y.bind('_initMessageNode', this));
}
this.after(Y.bind('_bindMessageUI', this), this, 'bindUI');
this.after(Y.bind('_syncMessageUI', this), this, 'syncUI');
},
/**
Creates the `_messageNode` property from the configured `MESSAGE_TEMPLATE`
and inserts it before the `<table>`'s `<tbody>` node.
@method _initMessageNode
@protected
@since 3.5.0
**/
_initMessageNode: function () {
if (!this._messageNode) {
this._messageNode = Y.Node.create(
Y.Lang.sub(this.MESSAGE_TEMPLATE, {
className: this.getClassName('message'),
contentClass: this.getClassName('message', 'content'),
colspan: this._displayColumns.length || 1
}));
this._tableNode.insertBefore(this._messageNode, this._tbodyNode);
}
},
/**
Add the messaging related strings to the `strings` map.
@method _initMessageStrings
@protected
@since 3.5.0
**/
_initMessageStrings: function () {
// Not a valueFn because other class extensions will want to add to it
this.set('strings', Y.mix((this.get('strings') || {}),
Y.Intl.get('datatable-message')));
},
/**
Node used to display messages from `showMessage`.
@property _messageNode
@type {Node}
@value `undefined` (not initially set)
@since 3.5.0
**/
//_messageNode: null,
/**
Synchronizes the message UI with the table state.
@method _syncMessageUI
@protected
@since 3.5.0
**/
_syncMessageUI: function () {
this._uiSetMessage();
},
/**
Calls `hideMessage` or `showMessage` as appropriate based on the presence of
records in the `data` ModelList.
This is called when `data` is reset or records are added or removed. Also,
if the `showMessages` attribute is updated. In either case, if the
triggering event has a `message` property on the EventFacade, it will be
passed to `showMessage` (if appropriate). If no such property is on the
facade, the `emptyMessage` will be used (see the strings).
@method _uiSetMessage
@param {EventFacade} e The columnsChange event
@protected
@since 3.5.0
**/
_uiSetMessage: function (e) {
if (!this.data.size()) {
this.showMessage((e && e.message) || 'emptyMessage');
} else {
this.hideMessage();
}
}
});
if (Y.Lang.isFunction(Y.DataTable)) {
Y.Base.mix(Y.DataTable, [ Message ]);
}