jellyfin-web/dashboard-ui/bower_components/emby-webcomponents/focusmanager.js

define(["dom"],function(dom){"use strict";function pushScope(elem){scopes.push(elem)}function popScope(elem){scopes.length&&(scopes.length-=1)}function autoFocus(view,defaultToFirst,findAutoFocusElement){var element;return findAutoFocusElement!==!1&&(element=view.querySelector("*[autofocus]"))?(focus(element),element):defaultToFirst!==!1&&(element=getFocusableElements(view,1)[0])?(focus(element),element):null}function focus(element){try{element.focus()}catch(err){console.log("Error in focusManager.autoFocus: "+err)}}function isFocusable(elem){return focusableTagNames.indexOf(elem.tagName)!==-1||!(!elem.classList||!elem.classList.contains("focusable"))}function focusableParent(elem){for(;!isFocusable(elem);)if(elem=elem.parentNode,!elem)return null;return elem}function isCurrentlyFocusableInternal(elem){return null!==elem.offsetParent}function isCurrentlyFocusable(elem){if(elem.disabled)return!1;if("-1"===elem.getAttribute("tabindex"))return!1;if("INPUT"===elem.tagName){var type=elem.type;if("range"===type)return!1}return isCurrentlyFocusableInternal(elem)}function getDefaultScope(){return scopes[0]||document.body}function getFocusableElements(parent,limit){for(var elems=(parent||getDefaultScope()).querySelectorAll(focusableQuery),focusableElements=[],i=0,length=elems.length;i<length;i++){var elem=elems[i];if(isCurrentlyFocusableInternal(elem)&&(focusableElements.push(elem),limit&&focusableElements.length>=limit))break}return focusableElements}function isFocusContainer(elem,direction){if(focusableContainerTagNames.indexOf(elem.tagName)!==-1)return!0;if(elem.classList.contains("focuscontainer"))return!0;if(direction<2){if(elem.classList.contains("focuscontainer-x"))return!0}else if(3===direction&&elem.classList.contains("focuscontainer-down"))return!0;return!1}function getFocusContainer(elem,direction){for(;!isFocusContainer(elem,direction);)if(elem=elem.parentNode,!elem)return getDefaultScope();return elem}function getOffset(elem){var box;return box=elem.getBoundingClientRect?elem.getBoundingClientRect():{top:0,left:0,width:0,height:0},{top:box.top,left:box.left,width:box.width,height:box.height}}function getViewportBoundingClientRect(elem){var offset=getOffset(elem);return offset.right=offset.left+offset.width,offset.bottom=offset.top+offset.height,offset}function nav(activeElement,direction){activeElement=activeElement||document.activeElement,activeElement&&(activeElement=focusableParent(activeElement));var container=activeElement?getFocusContainer(activeElement,direction):getDefaultScope();if(!activeElement)return void autoFocus(container,!0,!1);for(var focusableContainer=dom.parentWithClass(activeElement,"focusable"),rect=getViewportBoundingClientRect(activeElement),focusableElements=[],focusable=container.querySelectorAll(focusableQuery),i=0,length=focusable.length;i<length;i++){var curr=focusable[i];if(curr!==activeElement&&curr!==focusableContainer){var elementRect=getViewportBoundingClientRect(curr);if(elementRect.width||elementRect.height){switch(direction){case 0:if(elementRect.left>=rect.left)continue;if(elementRect.right===rect.right)continue;break;case 1:if(elementRect.right<=rect.right)continue;if(elementRect.left===rect.left)continue;break;case 2:if(elementRect.top>=rect.top)continue;if(elementRect.bottom>=rect.bottom)continue;break;case 3:if(elementRect.bottom<=rect.bottom)continue;if(elementRect.top<=rect.top)continue}focusableElements.push({element:curr,clientRect:elementRect})}}}var nearest=getNearestElements(focusableElements,rect,direction);if(nearest.length){var nearestElement=nearest[0].node;if(activeElement){var nearestElementFocusableParent=dom.parentWithClass(nearestElement,"focusable");nearestElementFocusableParent&&nearestElementFocusableParent!==nearestElement&&focusableContainer!==nearestElementFocusableParent&&(nearestElement=nearestElementFocusableParent)}focus(nearestElement)}}function intersectsInternal(a1,a2,b1,b2){return b1>=a1&&b1<=a2||b2>=a1&&b2<=a2}function intersects(a1,a2,b1,b2){return intersectsInternal(a1,a2,b1,b2)||intersectsInternal(b1,b2,a1,a2)}function getNearestElements(ele