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/**
* jQuery plugin to update the tooltip to show the correct access key
*/
// Whether to use 'test-' instead of correct prefix (for unit tests)
let testMode = false;
let cachedModifiers;
/**
* Find the modifier keys that need to be pressed together with the accesskey to trigger the input.
*
* The result is dependent 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|undefined} [nav] A Navigator object with `userAgent` and `platform` properties.
* @return {string} Label with dash-separated segments in this order: ctrl, option, alt, shift, esc
*/
function getAccessKeyModifiers( nav ) {
if ( !nav && cachedModifiers ) {
return cachedModifiers;
}
const profile = $.client.profile( nav );
let accessKeyModifiers;
switch ( profile.name ) {
// Historical: Opera 8-13 used shift-esc- (Presto engine, no longer supported).
// Opera 15+ (Blink engine) matches Chromium.
// Historical: Konqueror 3-4 (WebKit) behaved the same as Safari (no longer supported).
// Konqueror 18+ (QtWebEngine/Chromium engine) is profiled as 'chrome',
// and matches Chromium behaviour.
case 'opera':
case 'chrome':
if ( profile.platform === 'mac' ) {
// Chromium on macOS
accessKeyModifiers = 'ctrl-option';
} else {
// Chromium on Windows or Linux
// (both alt- and alt-shift work, but alt with E, D, F etc does not
// work since they are native browser shortcuts as well, so advertise
// alt-shift- instead)
accessKeyModifiers = 'alt-shift';
}
break;
// Historical: Firefox 1.x used alt- (no longer supported).
case 'firefox':
case 'iceweasel':
if ( profile.platform === 'mac' ) {
if ( profile.versionNumber < 14 ) {
accessKeyModifiers = 'ctrl';
} else {
// Firefox 14+ on macOS
accessKeyModifiers = 'ctrl-option';
}
} else {
// Firefox 2+ on Windows or Linux
accessKeyModifiers = 'alt-shift';
}
break;
// Historical: Safari <= 3 on Windows used alt- (no longer supported).
// Historical: Safari <= 3 on macOS used ctrl- (no longer supported).
case 'safari':
// Safari 4+ (WebKit 526+) on macOS
accessKeyModifiers = 'ctrl-option';
break;
case 'msie':
case 'edge':
accessKeyModifiers = 'alt';
break;
default:
accessKeyModifiers = profile.platform === 'mac' ? 'ctrl' : 'alt';
break;
}
if ( !nav ) {
// If not for a custom UA string, cache and re-use
cachedModifiers = 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
// https://html.spec.whatwg.org/multipage/interaction.html#dom-accesskeylabel
if ( !testMode && element.accessKeyLabel ) {
return element.accessKeyLabel;
}
return ( testMode ? 'test' : getAccessKeyModifiers() ) + '-' + 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 ) {
const oldTitle = titleElement.title;
if ( !oldTitle ) {
// don't add a title if the element didn't have one before
return;
}
const separatorMsg = mw.message( 'word-separator' ).plain();
const parts = ( separatorMsg + mw.message( 'brackets' ).plain() ).split( '$1' );
const regexp = new RegExp( parts.map( mw.util.escapeRegExp ).join( '.*?' ) + '$' );
let newTitle = oldTitle.replace( regexp, '' );
const accessKeyLabel = getAccessKeyLabel( element );
if ( accessKeyLabel ) {
// Should be build the same as in Linker::titleAttrib
newTitle += separatorMsg + mw.message( 'brackets', accessKeyLabel ).plain();
}
if ( oldTitle !== newTitle ) {
titleElement.title = newTitle;
}
}
// HTML elements that can have an associated label
// https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Content_categories#Form-associated_content
const labelable = 'button, input, textarea, keygen, meter, output, progress, select';
/**
* Update the title for an element to show the correct access key label.
*
* @private
* @param {HTMLElement} element Element with the accesskey
*/
function updateTooltip( element ) {
updateTooltipOnElement( element, element );
// update associated label if there is one
const $element = $( element );
if ( $element.is( labelable ) ) {
// Search it using 'for' attribute
const id = element.id.replace( /"/g, '\\"' );
if ( id ) {
const $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
const $labelParent = $element.parents( 'label' );
if ( $labelParent.length === 1 ) {
updateTooltipOnElement( element, $labelParent[ 0 ] );
}
}
}
/**
* Update the titles for all elements in a jQuery selection.
*
* To use this {@link jQuery} plugin, load the `mediawiki.util` module using {@link mw.loader}.
*
* @memberof module:mediawiki.util
* @method
* @return {jQuery}
* @example
* // Converts tooltip "[z]" to associated browser shortcut key e.g. "[ctrl-option-z]"
* mw.loader.using( 'mediawiki.util' ).then( () => {
* var $a = $('<a href="/wiki/Main_Page" title="Visit the main page [z]" accesskey="z"><span>Main page</span></a>');
* $a.updateTooltipAccessKeys();
* } );
* @chainable
*/
$.fn.updateTooltipAccessKeys = function () {
return this.each( function () {
updateTooltip( this );
} );
};
$.fn.updateTooltipAccessKeys.getAccessKeyLabel = getAccessKeyLabel;
/**
* getAccessKeyPrefix
*
* @method updateTooltipAccessKeys_getAccessKeyPrefix
* @param {Object} [nav] An object with a 'userAgent' and 'platform' property.
* @return {string}
* @ignore
*/
$.fn.updateTooltipAccessKeys.getAccessKeyPrefix = function ( nav ) {
return getAccessKeyModifiers( nav ) + '-';
};
/**
* Switch test mode on and off.
*
* @method updateTooltipAccessKeys_setTestMode
* @param {boolean} mode New mode
* @ignore
*/
$.fn.updateTooltipAccessKeys.setTestMode = function ( mode ) {
testMode = mode;
};