fancyapps-ui/dist/panzoom.esm.js

// @fancyapps/ui/Panzoom v4.0.12
const t=t=>"object"==typeof t&&null!==t&&t.constructor===Object&&"[object Object]"===Object.prototype.toString.call(t),i=(...e)=>{let s=!1;"boolean"==typeof e[0]&&(s=e.shift());let n=e[0];if(!n||"object"!=typeof n)throw new Error("extendee must be an object");const o=e.slice(1),h=o.length;for(let e=0;e<h;e++){const h=o[e];for(let e in h)if(h.hasOwnProperty(e)){const o=h[e];if(s&&(Array.isArray(o)||t(o))){const t=Array.isArray(o)?[]:{};n[e]=i(!0,n.hasOwnProperty(e)?n[e]:t,o)}else n[e]=o}}return n},e=(t,i=1e4)=>(t=parseFloat(t)||0,Math.round((t+Number.EPSILON)*i)/i),s="undefined"!=typeof window&&window.ResizeObserver||class{constructor(t){this.observables=[],this.boundCheck=this.check.bind(this),this.boundCheck(),this.callback=t}observe(t){if(this.observables.some((i=>i.el===t)))return;const i={el:t,size:{height:t.clientHeight,width:t.clientWidth}};this.observables.push(i)}unobserve(t){this.observables=this.observables.filter((i=>i.el!==t))}disconnect(){this.observables=[]}check(){const t=this.observables.filter((t=>{const i=t.el.clientHeight,e=t.el.clientWidth;if(t.size.height!==i||t.size.width!==e)return t.size.height=i,t.size.width=e,!0})).map((t=>t.el));t.length>0&&this.callback(t),window.requestAnimationFrame(this.boundCheck)}};class n{constructor(t){this.id=-1,this.id=t.pointerId||t.identifier||-1,this.pageX=t.pageX,this.pageY=t.pageY,this.clientX=t.clientX,this.clientY=t.clientY,this.nativePointer=t}}function o(t,i){return i?Math.sqrt((i.clientX-t.clientX)**2+(i.clientY-t.clientY)**2):0}function h(t,i){return i?{clientX:(t.clientX+i.clientX)/2,clientY:(t.clientY+i.clientY)/2}:t}class r{constructor(t,{start:i=(()=>!0),move:e=(()=>{}),end:s=(()=>{})}={}){this.element=t,this.startPointers=[],this.currentPointers=[],this.startCallback=i,this.moveCallback=e,this.endCallback=s,this.onStart=t=>{if(t.button&&0!==t.button)return;const i=new n(t);if(!1===this.startCallback(i,t))return!1;t.preventDefault(),(()=>{const t=window.getSelection?window.getSelection():document.selection;t&&t.rangeCount&&t.getRangeAt(0).getClientRects().length&&(t.removeAllRanges?t.removeAllRanges():t.empty&&t.empty())})(),this.currentPointers.push(i),this.startPointers.push(i);(t.target&&"setPointerCapture"in t.target?t.target:this.element).setPointerCapture(t.pointerId),this.element.addEventListener("pointermove",this.onMove),this.element.addEventListener("pointerup",this.onEnd),this.element.addEventListener("pointercancel",this.onEnd)},this.onMove=t=>{const i=this.currentPointers.slice(),e=[];for(const i of[new n(t)]){const t=this.currentPointers.findIndex((t=>t.id===i.id));t<0||(e.push(i),this.currentPointers[t]=i)}e.length&&this.moveCallback(i,this.currentPointers,t)},this.onEnd=t=>{const i=new n(t),e=this.currentPointers.findIndex((t=>t.id===i.id));if(-1===e)return!1;this.currentPointers.splice(e,1),this.startPointers.splice(e,1),this.endCallback(i,t),this.currentPointers.length||(this.element.removeEventListener("pointermove",this.onMove),this.element.removeEventListener("pointerup",this.onEnd),this.element.removeEventListener("pointercancel",this.onEnd))},this.element.addEventListener("pointerdown",this.onStart)}stop(){this.element.removeEventListener("pointerdown",this.onStart),this.element.removeEventListener("pointermove",this.onMove),this.element.removeEventListener("pointerup",this.onEnd),this.element.removeEventListener("pointercancel",this.onEnd)}}const a=function(t){return!!(t&&"object"==typeof t&&t instanceof Element&&t!==document.body)&&(function(t){const i=getComputedStyle(t)["overflow-y"],e=getComputedStyle(t)["overflow-x"],s=("scroll"===i||"auto"===i)&&Math.abs(t.scrollHeight-t.clientHeight)>1,n=("scroll"===e||"auto"===e)&&Math.abs(t.scrollWidth-t.clientWidth)>1;return s||n}(t)?t:a(t.parentNode))};const c={touch:!0,zoom:!0,pinchToZoom:!0,panOnlyZoomed:!1,lockAxis:!1,friction:.64,decelFriction:.88,zoomFriction:.74,bounceForce:.2,baseScale:1,minScale:1,maxScale:2,step:.5,textSelection:!1,click:"toggleZoom",wheel:"zoom",wheelFactor:42,wheelLimit:5,draggableClass:"is-draggable",draggingClass:"is-dragging",ratio:1};class l extends cla