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/**
* @file
* A Backbone View that provides the aural view of CKEditor toolbar
* configuration.
*/
(function (Drupal, Backbone, $) {
'use strict';
Drupal.ckeditor.AuralView = Backbone.View.extend(/** @lends Drupal.ckeditor.AuralView# */{
/**
* @type {object}
*/
events: {
'click .ckeditor-buttons a': 'announceButtonHelp',
'click .ckeditor-multiple-buttons a': 'announceSeparatorHelp',
'focus .ckeditor-button a': 'onFocus',
'focus .ckeditor-button-separator a': 'onFocus',
'focus .ckeditor-toolbar-group': 'onFocus'
},
/**
* Backbone View for CKEditor toolbar configuration; aural UX (output only).
*
* @constructs
*
* @augments Backbone.View
*/
initialize: function () {
// Announce the button and group positions when the model is no longer
// dirty.
this.listenTo(this.model, 'change:isDirty', this.announceMove);
},
/**
* Calls announce on buttons and groups when their position is changed.
*
* @param {Drupal.ckeditor.ConfigurationModel} model
* The ckeditor configuration model.
* @param {bool} isDirty
* A model attribute that indicates if the changed toolbar configuration
* has been stored or not.
*/
announceMove: function (model, isDirty) {
// Announce the position of a button or group after the model has been
// updated.
if (!isDirty) {
var item = document.activeElement || null;
if (item) {
var $item = $(item);
if ($item.hasClass('ckeditor-toolbar-group')) {
this.announceButtonGroupPosition($item);
}
else if ($item.parent().hasClass('ckeditor-button')) {
this.announceButtonPosition($item.parent());
}
}
}
},
/**
* Handles the focus event of elements in the active and available toolbars.
*
* @param {jQuery.Event} event
* The focus event that was triggered.
*/
onFocus: function (event) {
event.stopPropagation();
var $originalTarget = $(event.target);
var $currentTarget = $(event.currentTarget);
var $parent = $currentTarget.parent();
if ($parent.hasClass('ckeditor-button') || $parent.hasClass('ckeditor-button-separator')) {
this.announceButtonPosition($currentTarget.parent());
}
else if ($originalTarget.attr('role') !== 'button' && $currentTarget.hasClass('ckeditor-toolbar-group')) {
this.announceButtonGroupPosition($currentTarget);
}
},
/**
* Announces the current position of a button group.
*
* @param {jQuery} $group
* A jQuery set that contains an li element that wraps a group of buttons.
*/
announceButtonGroupPosition: function ($group) {
var $groups = $group.parent().children();
var $row = $group.closest('.ckeditor-row');
var $rows = $row.parent().children();
var position = $groups.index($group) + 1;
var positionCount = $groups.not('.placeholder').length;
var row = $rows.index($row) + 1;
var rowCount = $rows.not('.placeholder').length;
var text = Drupal.t('@groupName button group in position @position of @positionCount in row @row of @rowCount.', {
'@groupName': $group.attr('data-drupal-ckeditor-toolbar-group-name'),
'@position': position,
'@positionCount': positionCount,
'@row': row,
'@rowCount': rowCount
});
// If this position is the first in the last row then tell the user that
// pressing the down arrow key will create a new row.
if (position === 1 && row === rowCount) {
text += '\n';
text += Drupal.t('Press the down arrow key to create a new row.');
}
Drupal.announce(text, 'assertive');
},
/**
* Announces current button position.
*
* @param {jQuery} $button
* A jQuery set that contains an li element that wraps a button.
*/
announceButtonPosition: function ($button) {
var $row = $button.closest('.ckeditor-row');
var $rows = $row.parent().children();
var $buttons = $button.closest('.ckeditor-buttons').children();
var $group = $button.closest('.ckeditor-toolbar-group');
var $groups = $group.parent().children();
var groupPosition = $groups.index($group) + 1;
var groupPositionCount = $groups.not('.placeholder').length;
var position = $buttons.index($button) + 1;
var positionCount = $buttons.length;
var row = $rows.index($row) + 1;
var rowCount = $rows.not('.placeholder').length;
// The name of the button separator is 'button separator' and its type
// is 'separator', so we do not want to print the type of this item,
// otherwise the UA will speak 'button separator separator'.
var type = ($button.attr('data-drupal-ckeditor-type') === 'separator') ? '' : Drupal.t('button');
var text;
// The button is located in the available button set.
if ($button.closest('.ckeditor-toolbar-disabled').length > 0) {
text = Drupal.t('@name @type.', {
'@name': $button.children().attr('aria-label'),
'@type': type
});
text += '\n' + Drupal.t('Press the down arrow key to activate.');
Drupal.announce(text, 'assertive');
}
// The button is in the active toolbar.
else if ($group.not('.placeholder').length === 1) {
text = Drupal.t('@name @type in position @position of @positionCount in @groupName button group in row @row of @rowCount.', {
'@name': $button.children().attr('aria-label'),
'@type': type,
'@position': position,
'@positionCount': positionCount,
'@groupName': $group.attr('data-drupal-ckeditor-toolbar-group-name'),
'@row': row,
'@rowCount': rowCount
});
// If this position is the first in the last row then tell the user that
// pressing the down arrow key will create a new row.
if (groupPosition === 1 && position === 1 && row === rowCount) {
text += '\n';
text += Drupal.t('Press the down arrow key to create a new button group in a new row.');
}
// If this position is the last one in this row then tell the user that
// moving the button to the next group will create a new group.
if (groupPosition === groupPositionCount && position === positionCount) {
text += '\n';
text += Drupal.t('This is the last group. Move the button forward to create a new group.');
}
Drupal.announce(text, 'assertive');
}
},
/**
* Provides help information when a button is clicked.
*
* @param {jQuery.Event} event
* The click event for the button click.
*/
announceButtonHelp: function (event) {
var $link = $(event.currentTarget);
var $button = $link.parent();
var enabled = $button.closest('.ckeditor-toolbar-active').length > 0;
var message;
if (enabled) {
message = Drupal.t('The "@name" button is currently enabled.', {
'@name': $link.attr('aria-label')
});
message += '\n' + Drupal.t('Use the keyboard arrow keys to change the position of this button.');
message += '\n' + Drupal.t('Press the up arrow key on the top row to disable the button.');
}
else {
message = Drupal.t('The "@name" button is currently disabled.', {
'@name': $link.attr('aria-label')
});
message += '\n' + Drupal.t('Use the down arrow key to move this button into the active toolbar.');
}
Drupal.announce(message);
event.preventDefault();
},
/**
* Provides help information when a separator is clicked.
*
* @param {jQuery.Event} event
* The click event for the separator click.
*/
announceSeparatorHelp: function (event) {
var $link = $(event.currentTarget);
var $button = $link.parent();
var enabled = $button.closest('.ckeditor-toolbar-active').length > 0;
var message;
if (enabled) {
message = Drupal.t('This @name is currently enabled.', {
'@name': $link.attr('aria-label')
});
message += '\n' + Drupal.t('Use the keyboard arrow keys to change the position of this separator.');
}
else {
message = Drupal.t('Separators are used to visually split individual buttons.');
message += '\n' + Drupal.t('This @name is currently disabled.', {
'@name': $link.attr('aria-label')
});
message += '\n' + Drupal.t('Use the down arrow key to move this separator into the active toolbar.');
message += '\n' + Drupal.t('You may add multiple separators to each button group.');
}
Drupal.announce(message);
event.preventDefault();
}
});
})(Drupal, Backbone, jQuery);