js: 使用 libra.js 实现图片灯箱HEADmaster

2 files changed, 45 insertions, 0 deletions

diff --git a/assets/css/libra.css b/assets/css/libra.css
new file mode 100644
index 0000000..84216ee
--- /dev/null
+++ b/assets/css/libra.css
@@ -0,0 +1,43 @@
+.libra-overlay {

+    position: fixed;

+    top: 0;

+    left: 0;

+    width: 100%;

+    height: 100%;

+    padding: 1rem;

+    transition: opacity ease-in-out;

+

+    backdrop-filter: blur(2rem);

+    background-color: rgba(255, 255, 255, 0.75);

+

+    display: flex;

+    justify-content: center;

+    align-items: center;

+}

+

+.libra-overlay.libra-visible {

+    opacity: 1;

+    z-index: 900;

+}

+

+.libra-overlay.libra-hidden {

+    opacity: 0;

+    z-index: -100;

+}

+

+@media (prefers-color-scheme: dark) {

+    .libra-overlay {

+        background-color: rgba(0, 0, 0, 0.75);

+    }

+}

+

+.libra-shadow {

+    position: absolute;

+    transition-property: transform;

+    z-index: 1000;

+}

+

+.libra-shadow.open {

+    box-shadow: 0 0 1rem rgba(0, 0, 0, 0.5);

+}

+

diff --git a/assets/js/libra.min.js b/assets/js/libra.min.js
new file mode 100644
index 0000000..22b54b9
--- /dev/null
+++ b/assets/js/libra.min.js
@@ -0,0 +1,2 @@
+// https://codeberg.org/eltrac/libra/src/branch/master/dist/libra.min.js 2d5c1451b0

+let t={selector:"[data-libra]",margin:50,zeroMarginBreakpoint:768,offset:{x:0,y:0},transitionDuration:200,imageCursor:"zoom-in"};class e{constructor(){let e=document.createElement("div");return e.id="libra-overlay",e.classList.add("libra-overlay","libra-hidden"),e.style.transitionDuration=t.transitionDuration+"ms",this.element=e,document.body.appendChild(e),this}show(){this.element.classList.remove("libra-hidden"),this.element.classList.add("libra-visible")}hide(){this.element.classList.remove("libra-visible"),this.element.classList.add("libra-hidden")}}class i{static calculateFinalState(e){let i={},s=t.margin;window.innerWidth<=t.zeroMarginBreakpoint&&(s=0);let n=e.naturalWidth,o=e.naturalHeight,l=n/o,r=window.innerWidth-2*s,a=window.innerHeight-2*s;return i.width=n>r?r:n,i.height=n>r?r/l:o,i.height>a&&(i.height=a,i.width=a*l),i.top=(a-i.height)/2+window.scrollY+s+t.offset.y,i.left=(r-i.width)/2+window.scrollX+s+t.offset.x,i}static transformMatrix(t,e,i){let s=i.width/e.width,n=i.height/e.height,o=e.left+e.width/2,l=e.top+e.height/2,r=i.left+i.width/2,a=i.top+i.height/2;t.style.transform=`matrix(${s}, 0, 0, ${n}, ${r-o}, ${a-l})`}static resetTransformMatrix(t){t.style.transform="matrix(1, 0, 0, 1, 0, 0)"}}class s{isOpen=!1;constructor(t){return this.original=t,this.fetchOriginalPosition(),this.create(t),this}create(e){let i=document.createElement("img");i.src=e.src,i.id=`libra-shadow-${e.id}`,i.classList.add("libra-shadow"),i.style.transitionDuration=t.transitionDuration+"ms",this.element=i,this.positionShadow(),this.placeItself()}fetchOriginalPosition(){let e=this.original.getBoundingClientRect();this.originalPosition={top:e.top+window.scrollY+t.offset.y,left:e.left+window.scrollX+t.offset.x,width:e.width,height:e.height}}positionShadow(){this.element.style.top=this.originalPosition.top+"px",this.element.style.left=this.originalPosition.left+"px",this.element.style.width=this.originalPosition.width+"px",this.element.style.height=this.originalPosition.height+"px"}open(){this.isOpen=!0,this.element.classList.add("open"),this.fetchOriginalPosition(),this.positionShadow(),this.original.style.visibility="hidden",document.body.contains(this.element)||this.placeItself();let t=()=>i.transformMatrix(this.element,this.originalPosition,i.calculateFinalState(this.element));0===this.element.naturalWidth||0===this.element.naturalHeight?this.element.addEventListener("load",t,{once:!0}):t()}close(){this.isOpen=!1,this.element.classList.remove("open"),i.resetTransformMatrix(this.element),setTimeout(()=>{this.original.style.visibility="visible",this.destroyItself()},t.transitionDuration)}placeItself(){document.body.appendChild(this.element)}destroyItself(){document.body.contains(this.element)&&document.body.removeChild(this.element)}}class n{currentImage=null;shadows={};constructor(e){!function t(e,i){for(let s in i)"object"!=typeof i[s]||null===i[s]||Array.isArray(i[s])?e[s]=i[s]:(e[s]||(e[s]={}),t(e[s],i[s]));return e}(t,e),this.initOverlay(),this.initImages(),this.initControls()}initOverlay(){this.overlay=new e,this.overlay.element.addEventListener("click",()=>{this.closeCurrent()})}initImages(){this.images=document.querySelectorAll(t.selector),this.images.forEach(e=>{"IMG"===e.tagName&&(e.id=crypto.randomUUID(),e.style.cursor=t.imageCursor,e.addEventListener("click",()=>this.open(e)))})}initControls(){document.addEventListener("keydown",t=>{("Escape"===t.key||" "===t.key)&&this.closeCurrent()}),document.body.addEventListener("wheel",t=>this.closeCurrent()),document.body.addEventListener("touchmove",t=>this.closeCurrent())}open(t){this.currentImage=t;let e=this.shadows[t.id]||new s(t);this.shadows[t.id]||(this.shadows[t.id]=e),e.open(),this.overlay.show()}close(t){this.currentImage=null,this.shadows[t.id]&&(this.shadows[t.id].close(),this.overlay.hide())}closeCurrent(){this.currentImage&&this.close(this.currentImage)}}export{n as default};