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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 1 or more of the string values, in this order: ctrl, option, alt, shift, esc
+ */
+ function getAccessKeyModifiers( ua ) {
+ var profile, accessKeyModifiers;
+
+ // use cached prefix if possible
+ if ( !ua && cachedAccessKeyModifiers ) {
+ return cachedAccessKeyModifiers;
+ }
+
+ profile = $.client.profile( ua );
+
+ switch ( profile.name ) {
+ case 'chrome':
+ case 'opera':
+ if ( profile.name === 'opera' && profile.versionNumber < 15 ) {
+ accessKeyModifiers = [ 'shift', 'esc' ];
+ } else if ( profile.platform === 'mac' ) {
+ accessKeyModifiers = [ 'ctrl', 'option' ];
+ } else {
+ // Chrome/Opera 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)
+ accessKeyModifiers = [ 'alt', 'shift' ];
+ }
+ break;
+ case 'firefox':
+ case 'iceweasel':
+ if ( profile.versionBase < 2 ) {
+ // Before v2, Firefox used alt, though it was rebindable in about:config
+ accessKeyModifiers = [ 'alt' ];
+ } else {
+ if ( profile.platform === 'mac' ) {
+ if ( profile.versionNumber < 14 ) {
+ accessKeyModifiers = [ 'ctrl' ];
+ } else {
+ accessKeyModifiers = [ 'ctrl', 'option' ];
+ }
+ } else {
+ accessKeyModifiers = [ 'alt', 'shift' ];
+ }
+ }
+ break;
+ case 'safari':
+ case 'konqueror':
+ if ( profile.platform === 'win' ) {
+ accessKeyModifiers = [ 'alt' ];
+ } else {
+ if ( profile.layoutVersion > 526 ) {
+ // Non-Windows Safari with webkit_version > 526
+ accessKeyModifiers = [ 'ctrl', profile.platform === 'mac' ? 'option' : 'alt' ];
+ } else {
+ accessKeyModifiers = [ 'ctrl' ];
+ }
+ }
+ break;
+ case 'msie':
+ case 'edge':
+ accessKeyModifiers = [ 'alt' ];
+ break;
+ default:
+ accessKeyModifiers = profile.platform === 'mac' ? [ 'ctrl' ] : [ 'alt' ];
+ break;
+ }
+
+ // 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
+ // https://html.spec.whatwg.org/multipage/interaction.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 oldTitle, parts, regexp, newTitle, accessKeyLabel;
+
+ oldTitle = titleElement.title;
+ if ( !oldTitle ) {
+ // don't add a title if the element didn't have one before
+ return;
+ }
+
+ parts = ( mw.msg( 'word-separator' ) + mw.msg( 'brackets' ) ).split( '$1' );
+ regexp = new RegExp( parts.map( mw.RegExp.escape ).join( '.*?' ) + '$' );
+ newTitle = oldTitle.replace( regexp, '' );
+ accessKeyLabel = getAccessKeyLabel( element );
+
+ 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 since 1.27 Use #getAccessKeyModifiers
+ * @param {Object} [ua] An object with a 'userAgent' and 'platform' property.
+ * @return {string}
+ */
+ $.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 ) );