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/**
* jQuery plugin to update the tooltip to show the correct access key
*
* @class jQuery.plugin.accessKeyLabel
*/
( function ( $, mw ) {
// Cached access key modifiers for used browser
var cachedAccessKeyModifiers,
// Whether to use 'test-' instead of correct prefix (used for testing)
useTestPrefix = false,
// tag names which can have a label tag
// https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Content_categories#Form-associated_content
labelable = 'button, input, textarea, keygen, meter, output, progress, select';
/**
* Find the modifier keys that need to be pressed together with the accesskey to trigger the input.
*
* The result is dependant on the ua paramater or the current platform.
* For browsers that support accessKeyLabel, #getAccessKeyLabel never calls here.
* Valid key values that are returned can be: ctrl, alt, option, shift, esc
*
* @private
* @param {Object} [ua] An object with a 'userAgent' and 'platform' property.
* @return {Array} Array with 0 or more of the string values: ctrl, option, alt, shift, esc
*/
function getAccessKeyModifiers( ua ) {
// use cached prefix if possible
if ( !ua && cachedAccessKeyModifiers ) {
return cachedAccessKeyModifiers;
}
var profile = $.client.profile( ua ),
accessKeyModifiers = [ 'alt' ];
// Classic Opera on any platform
if ( profile.name === 'opera' && profile.versionNumber < 15 ) {
accessKeyModifiers = [ 'shift', 'esc' ];
// Chrome and modern Opera on any platform
} else if ( profile.name === 'chrome' || profile.name === 'opera' ) {
accessKeyModifiers = (
profile.platform === 'mac'
// Chrome on Mac
? [ 'ctrl', 'option' ]
// Chrome on Windows or Linux
// (both alt- and alt-shift work, but alt with E, D, F etc does not
// work since they are browser shortcuts)
: [ 'alt', 'shift' ]
);
// Non-Windows Safari with webkit_version > 526
} else if ( profile.platform !== 'win'
&& profile.name === 'safari'
&& profile.layoutVersion > 526
) {
accessKeyModifiers = [ 'ctrl', 'alt' ];
// Safari/Konqueror on any platform, or any browser on Mac
// (but not Safari on Windows)
} else if ( !( profile.platform === 'win' && profile.name === 'safari' )
&& ( profile.name === 'safari'
|| profile.platform === 'mac'
|| profile.name === 'konqueror' )
) {
accessKeyModifiers = [ 'ctrl' ];
// Firefox/Iceweasel 2.x and later
} else if ( ( profile.name === 'firefox' || profile.name === 'iceweasel' )
&& profile.versionBase > '1'
) {
accessKeyModifiers = [ 'alt', 'shift' ];
}
// cache modifiers
if ( !ua ) {
cachedAccessKeyModifiers = accessKeyModifiers;
}
return accessKeyModifiers;
}
/**
* Get the access key label for an element.
*
* Will use native accessKeyLabel if available (currently only in Firefox 8+),
* falls back to #getAccessKeyModifiers.
*
* @private
* @param {HTMLElement} element Element to get the label for
* @return {string} Access key label
*/
function getAccessKeyLabel( element ) {
// abort early if no access key
if ( !element.accessKey ) {
return '';
}
// use accessKeyLabel if possible
// http://www.whatwg.org/specs/web-apps/current-work/multipage/editing.html#dom-accesskeylabel
if ( !useTestPrefix && element.accessKeyLabel ) {
return element.accessKeyLabel;
}
return ( useTestPrefix ? 'test' : getAccessKeyModifiers().join( '-' ) ) + '-' + element.accessKey;
}
/**
* Update the title for an element (on the element with the access key or it's label) to show
* the correct access key label.
*
* @private
* @param {HTMLElement} element Element with the accesskey
* @param {HTMLElement} titleElement Element with the title to update (may be the same as `element`)
*/
function updateTooltipOnElement( element, titleElement ) {
var array = ( mw.msg( 'word-separator' ) + mw.msg( 'brackets' ) ).split( '$1' ),
regexp = new RegExp( $.map( array, mw.RegExp.escape ).join( '.*?' ) + '$' ),
oldTitle = titleElement.title,
rawTitle = oldTitle.replace( regexp, '' ),
newTitle = rawTitle,
accessKeyLabel = getAccessKeyLabel( element );
// don't add a title if the element didn't have one before
if ( !oldTitle ) {
return;
}
if ( accessKeyLabel ) {
// Should be build the same as in Linker::titleAttrib
newTitle += mw.msg( 'word-separator' ) + mw.msg( 'brackets', accessKeyLabel );
}
if ( oldTitle !== newTitle ) {
titleElement.title = newTitle;
}
}
/**
* Update the title for an element to show the correct access key label.
*
* @private
* @param {HTMLElement} element Element with the accesskey
*/
function updateTooltip( element ) {
var id, $element, $label, $labelParent;
updateTooltipOnElement( element, element );
// update associated label if there is one
$element = $( element );
if ( $element.is( labelable ) ) {
// Search it using 'for' attribute
id = element.id.replace( /"/g, '\\"' );
if ( id ) {
$label = $( 'label[for="' + id + '"]' );
if ( $label.length === 1 ) {
updateTooltipOnElement( element, $label[ 0 ] );
}
}
// Search it as parent, because the form control can also be inside the label element itself
$labelParent = $element.parents( 'label' );
if ( $labelParent.length === 1 ) {
updateTooltipOnElement( element, $labelParent[ 0 ] );
}
}
}
/**
* Update the titles for all elements in a jQuery selection.
*
* @return {jQuery}
* @chainable
*/
$.fn.updateTooltipAccessKeys = function () {
return this.each( function () {
updateTooltip( this );
} );
};
/**
* getAccessKeyModifiers
*
* @method updateTooltipAccessKeys_getAccessKeyModifiers
* @inheritdoc #getAccessKeyModifiers
*/
$.fn.updateTooltipAccessKeys.getAccessKeyModifiers = getAccessKeyModifiers;
/**
* getAccessKeyLabel
*
* @method updateTooltipAccessKeys_getAccessKeyLabel
* @inheritdoc #getAccessKeyLabel
*/
$.fn.updateTooltipAccessKeys.getAccessKeyLabel = getAccessKeyLabel;
/**
* getAccessKeyPrefix
*
* @method updateTooltipAccessKeys_getAccessKeyPrefix
* @deprecated 1.27 Use #getAccessKeyModifiers
*/
$.fn.updateTooltipAccessKeys.getAccessKeyPrefix = function ( ua ) {
return getAccessKeyModifiers( ua ).join( '-' ) + '-';
};
/**
* Switch test mode on and off.
*
* @method updateTooltipAccessKeys_setTestMode
* @param {boolean} mode New mode
*/
$.fn.updateTooltipAccessKeys.setTestMode = function ( mode ) {
useTestPrefix = mode;
};
/**
* @class jQuery
* @mixins jQuery.plugin.accessKeyLabel
*/
}( jQuery, mediaWiki ) );