leafer-draw/dist/web.esm.min.js

**leafer-draw** 是 [leafer-ui](https://github.com/leaferjs/leafer-ui) 的轻量版，体积小巧，移除了交互功能，仅提供绘制元素的功能，适用于绘制海报、插图、图表、动画等场景，或作为框架的底层绘制库。

import{Debug as t,LeaferCanvasBase as e,Platform as i,isString as s,DataHelper as n,canvasSizeAttrs as a,isUndefined as r,ResizeEvent as o,canvasPatch as l,Creator as d,LeaferImage as c,defineKey as h,FileHelper as u,LeafList as f,RenderEvent as p,ChildEvent as g,WatchEvent as _,PropertyEvent as w,LeafHelper as m,BranchHelper as y,LeafBoundsHelper as v,Bounds as x,isArray as b,LeafLevelList as S,LayoutEvent as k,Run as B,ImageManager as R,isObject as E,BoundsHelper as L,FourNumberHelper as A,Matrix as T,ImageEvent as P,MatrixHelper as C,MathHelper as O,AlignHelper as D,PointHelper as M,isNumber as W,getMatrixData as I,AroundHelper as F,OneRadian as z,Direction4 as Y}from"@leafer/core";export*from"@leafer/core";export{LeaferFilm,LeaferImage,LeaferVideo}from"@leafer/core";import{Paint as V,PaintImage as U,ColorConvert as X,PaintGradient as N,Effect as G,Group as q,TextConvert as j}from"@leafer-ui/draw";export*from"@leafer-ui/draw";var H;function Q(t,e,i,s){return new(i||(i=Promise))(function(n,a){function r(t){try{l(s.next(t))}catch(t){a(t)}}function o(t){try{l(s.throw(t))}catch(t){a(t)}}function l(t){var e;t.done?n(t.value):(e=t.value,e instanceof i?e:new i(function(t){t(e)})).then(r,o)}l((s=s.apply(t,e||[])).next())})}!function(t){t[t.none=1]="none",t[t.free=2]="free",t[t.mirrorAngle=3]="mirrorAngle",t[t.mirror=4]="mirror"}(H||(H={})),"function"==typeof SuppressedError&&SuppressedError;const $=t.get("LeaferCanvas");class Z extends e{set zIndex(t){const{style:e}=this.view;e.zIndex=t,this.setAbsolute(this.view)}set childIndex(t){const{view:e,parentView:i}=this;if(e&&i){const s=i.children[t];s?(this.setAbsolute(s),i.insertBefore(e,s)):i.appendChild(s)}}init(){const{config:t}=this,e=t.view||t.canvas;e?this.__createViewFrom(e):this.__createView();const{style:s}=this.view;if(s.display||(s.display="block"),this.parentView=this.view.parentElement,this.parentView){const t=this.parentView.style;t.webkitUserSelect=t.userSelect="none",this.view.classList.add("leafer-canvas-view")}i.syncDomFont&&!this.parentView&&(s.display="none",document.body&&document.body.appendChild(this.view)),this.__createContext(),this.autoLayout||this.resize(t)}set backgroundColor(t){this.view.style.backgroundColor=t}get backgroundColor(){return this.view.style.backgroundColor}set hittable(t){this.view.style.pointerEvents=t?"auto":"none"}get hittable(){return"none"!==this.view.style.pointerEvents}__createView(){this.view=document.createElement("canvas")}__createViewFrom(t){let e=s(t)?document.getElementById(t):t;if(e)if(e instanceof HTMLCanvasElement)this.view=e;else{let t=e;if(e===window||e===document){const e=document.createElement("div"),{style:i}=e;i.position="absolute",i.top=i.bottom=i.left=i.right="0px",document.body.appendChild(e),t=e}this.__createView();const i=this.view;t.hasChildNodes()&&(this.setAbsolute(i),t.style.position||(t.style.position="relative")),t.appendChild(i)}else $.error(`no id: ${t}`),this.__createView()}setAbsolute(t){const{style:e}=t;e.position="absolute",e.top=e.left="0px"}updateViewSize(){const{width:t,height:e,pixelRatio:i}=this,{style:s}=this.view;s.width=t+"px",s.height=e+"px",this.unreal||(this.view.width=Math.ceil(t*i),this.view.height=Math.ceil(e*i))}updateClientBounds(){this.view.parentElement&&(this.clientBounds=this.view.getBoundingClientRect())}startAutoLayout(t,e){if(this.resizeListener=e,t){if(this.autoBounds=t,this.resizeObserver)return;try{this.resizeObserver=new ResizeObserver(t=>{this.updateClientBounds();for(const e of t)this.checkAutoBounds(e.contentRect)});const t=this.parentView;t?(this.resizeObserver.observe(t),this.checkAutoBounds(t.getBoundingClientRect())):(this.checkAutoBounds(this.view),$.warn("no parent"))}catch(t){this.imitateResizeObserver()}this.stopListenPixelRatio()}else this.listenPixelRatio(),this.unreal&&this.updateViewSize()}imitateResizeObserver(){this.autoLayout&&(this.parentView&&this.checkAutoBounds(this.parentView.getBoundingClientRect()),i.requestRender(this.imitateResizeObserver.bind(this)))}listenPixelRatio(){this.windowListener||window.addEventListener("resize",this.windowListener=()=>{const t=i.devicePixelRatio;if(!this.config.pixelRatio&&this.pixelRatio!==t){const{width:e,height:i}=this;this.emitResize({width:e,height:i,pixelRatio:t})}})}stopListenPixelRatio(){this.windowListener&&(window.removeEventListener("resize",this.windowListener),this.windowListener=null)}checkAutoBounds(t){const e=this.view,{x:s,y:n,width:a,height:r}=this.autoBounds.getBoundsFrom(t),o={width:a,height:r,pixelRatio:this.config.pixelRatio?this.pixelRatio:i.devicePixelRatio};if(!this.isSameSize(o)){const{style:t}=e;t.marginLeft=s+"px",t.marginTop=n+"px",this.emitResize(o)}}stopAutoLayout(){this.autoLayout=!1,this.resizeObserver&&this.resizeObserver.disconnect(),this.resizeListener=this.resizeObserver=null}emitResize(t){const e={};n.copyAttrs(e,this,a),this.resize(t),this.resizeListener&&!r(this.width)&&this.resizeListener(new o(t,e))}unrealCanvas(){if(!this.unreal&&this.parentView){let t=this.view;t&&t.remove(),t=this.view=document.createElement("div"),this.parentView.appendChild(this.view),t.classList.add("leafer-app-view"),this.unreal=!0}}destroy(){const{view:t}=this;t&&(this.stopAutoLayout(),this.stopListenPixelRatio(),t.parentElement&&t.remove(),super.destroy())}}function J(t,e){i.origin={createCanvas(t,e){const i=document.createElement("canvas");return i.width=t,i.height=e,i},canvasToDataURL:(t,e,i)=>{const s=u.mimeType(e),n=t.toDataURL(s,i);return"image/bmp"===s?n.replace("image/png;","image/bmp;"):n},canvasToBolb:(t,e,i)=>new Promise(s=>t.toBlob(s,u.mimeType(e),i)),canvasSaveAs:(t,e,s)=>{const n=t.toDataURL(u.mimeType(u.fileType(e)),s);return i.origin.download(n,e)},download(t,e){return Q(this,void 0,void 0,function*(){let i=document.createElement("a");i.href=t,i.download=e,document.body.appendChild(i),i.click(),document.body.removeChild(i)})},loadImage:(t,e,s)=>new Promise((s,n)=>{const a=new i.origin.Image;e&&(a.setAttribute("crossOrigin",e),a.crossOrigin=e),a.onload=()=>{s(a)},a.onerror=t=>{n(t)},a.src=i.image.getRealURL(t)}),loadContent(t){return Q(this,arguments,void 0,function*(t,e="text"){const i=yield fetch(t);if(!i.ok)throw new Error(`${i.status}`);return yield i[e]()})},Image:Image,PointerEvent:PointerEvent,DragEvent:DragEvent},i.event={stopDefault(t){t.preventDefault()},stopNow(t){t.stopImmediatePropagation()},stop(t){t.stopPropagation()}},i.canvas=d.canvas(),i.conicGradientSupport=!!i.canvas.context.createConicGradient}l(CanvasRenderingContext2D.prototype),l(Path2D.prototype),Object.assign(d,{canvas:(t,e)=>new Z(t,e),image:t=>new c(t)}),i.name="web",i.isMobile="ontouchstart"in window,i.requestRender=function(t){window.requestAnimationFrame(t)},h(i,"devicePixelRatio",{get:()=>devicePixelRatio});const{userAgent:K}=navigator;K.indexOf("Firefox")>-1?(i.intWheelDeltaY=!0,i.syncDomFont=!0):(/iPhone|iPad|iPod/.test(navigator.userAgent)||/Macintosh/.test(navigator.userAgent)&&/Version\/[\d.]+.*Safari/.test(navigator.userAgent))&&(i.fullImageShadow=!0),K.indexOf("Windows")>-1?(i.os="Windows",i.intWheelDeltaY=!0):K.indexOf("Mac")>-1?i.os="Mac":K.indexOf("Linux")>-1&&(i.os="Linux");class tt{get childrenChanged(){return this.hasAdd||this.hasRemove||this.hasVisible}get updatedList(){if(this.hasRemove&&this.config.usePartLayout){const t=new f;return this.__updatedList.list.forEach(e=>{e.leafer&&t.add(e)}),t}return this.__updatedList}constructor(t,e){this.totalTimes=0,this.config={},this.__updatedList=new f,this.target=t,e&&(this.config=n.default(e,this.config)),this.__listenEvents()}start(){this.disabled||(this.running=!0)}stop(){this.running=!1}disable(){this.stop(),this.__removeListenEvents(),this.disabled=!0}update(){this.changed=!0,this.running&&this.target.emit(p.REQUEST)}__onAttrChange(t){this.config.usePartLayout&&this.__updatedList.add(t.target),this.update()}__onChildEvent(t){this.config.usePartLayout&&(t.type===g.ADD?(this.hasAdd=!0,this.__pushChild(t.child)):(this.hasRemove=!0,this.__updatedList.add(t.parent))),this.update()}__pushChild(t){this.__updatedList.add(t),t.isBranch&&this.__loopChildren(t)}__loopChildren(t){const{children:e}=t;for(let t=0,i=e.length;t<i;t++)this.__pushChild(e[t])}__onRquestData(){this.target.emitEvent(new _(_.DATA,{updatedList:this.updatedList})),this.__updatedList=new f,this.totalTimes++,this.changed=this.hasVisible=this.hasRemove=this.hasAdd=!1}__listenEvents(){this.__eventIds=[this.target.on_([[w.CHANGE,this.__onAttrChange,this],[[g.ADD,g.REMOVE],this.__onChildEvent,this],[_.REQUEST,this.__onRquestData,this]])]}__removeListenEvents(){this.target.off_(this.__eventIds)}destroy(){this.target&&(this.stop(),this.__removeListenEvents(),this.target=this.__updatedList=null)}}const{updateAllMatrix:et,updateBounds:it,updateChange:st}=m,{pushAllChildBranch:nt,pushAllParent:at}=y;const{worldBounds:rt}=v;class ot{constructor(t){this.updatedBounds=new x,this.beforeBounds=new x,this.afterBounds=new x,b(t)&&(t=new f(t)),this.updatedList=t}setBefore(){this.beforeBounds.setListWithFn(this.updatedList.list,rt)}setAfter(){this.afterBounds.setListWithFn(this.updatedList.list,rt),this.updatedBounds.setList([this.beforeBounds,this.afterBounds])}merge(t){this.updatedList.addList(t.updatedList.list),this.beforeBounds.add(t.beforeBounds),this.afterBounds.add(t.afterBounds),this.updatedBounds.add(t.updatedBounds)}destroy(){this.updatedList=null}}const{updateAllMatrix:lt,updateAllChange:dt}=m,ct=t.get("Layouter");class ht{constructor(t,e){this.totalTimes=0,this.config={usePartLayout:!0},this.__levelList=new S,this.target=t,e&&(this.config=n.default(e,this.config)),this.__listenEvents()}start(){this.disabled||(this.running=!0)}stop(){this.running=!1}disable(){this.stop(),this.__removeListenEvents(),this.disabled=!0}layout(){if(this.layouting||!this.running)return;const{target:t}=this;this.times=0;try{t.emit(k.START),this.layoutOnce(),t.emitEvent(new k(k.END,this.layoutedBlocks,this.times))}catch(t){ct.error(t)}this.layoutedBlocks=null}layoutAgain(){this.layouting?this.waitAgain=!0:this.layoutOnce()}layoutOnce(){return this.layouting?ct.warn("layouting"):this.times>3?ct.warn("layout max times"):(this.times++,this.totalTimes++,this.layouting=!0,this.target.emit(_.REQUEST),this.totalTimes>1&&this.config.usePartLayout?this.partLayout():this.fullLayout(),this.layouting=!1,void(this.waitAgain&&(this.waitAgain=!1,this.layoutOnce())))}partLayout(){var t;if(!(null===(t=this.__updatedList)||void 0===t?void 0:t.length))return;const e=B.start("PartLayout"),{target:i,__updatedList:s}=this,{BEFORE:n,LAYOUT:a,AFTER:r}=k,o=this.getBlocks(s);o.forEach(t=>t.setBefore()),i.emitEvent(new k(n,o,this.times)),this.extraBlock=null,s.sort(),function(t,e){let i;t.list.forEach(t=>{i=t.__layout,e.without(t)&&!i.proxyZoom&&(i.matrixChanged?(et(t,!0),e.add(t),t.isBranch&&nt(t,e),at(t,e)):i.boundsChanged&&(e.add(t),t.isBranch&&(t.__tempNumber=0),at(t,e)))})}(s,this.__levelList),function(t){let e,i,s;t.sort(!0),t.levels.forEach(n=>{e=t.levelMap[n];for(let t=0,n=e.length;t<n;t++){if(i=e[t],i.isBranch&&i.__tempNumber){s=i.children;for(let t=0,e=s.length;t<e;t++)s[t].isBranch||it(s[t])}it(i)}})}(this.__levelList),function(t){t.list.forEach(st)}(s),this.extraBlock&&o.push(this.extraBlock),o.forEach(t=>t.setAfter()),i.emitEvent(new k(a,o,this.times)),i.emitEvent(new k(r,o,this.times)),this.addBlocks(o),this.__levelList.reset(),this.__updatedList=null,B.end(e)}fullLayout(){const t=B.start("FullLayout"),{target:e}=this,{BEFORE:i,LAYOUT:s,AFTER:n}=k,a=this.getBlocks(new f(e));e.emitEvent(new k(i,a,this.times)),ht.fullLayout(e),a.forEach(t=>{t.setAfter()}),e.emitEvent(new k(s,a,this.times)),e.emitEvent(new k(n,a,this.times)),this.addBlocks(a),B.end(t)}static fullLayout(t){lt(t,!0),t.isBranch?y.updateBounds(t):m.updateBounds(t),dt(t)}addExtra(t){if(!this.__updatedList.has(t)){const{updatedList:e,beforeBounds:i}=this.extraBlock||(this.extraBlock=new ot([]));e.length?i.add(t.__world):i.set(t.__world),e.add(t)}}createBlock(t){return new ot(t)}getBlocks(t){return[this.createBlock(t)]}addBlocks(t){this.layoutedBlocks?this.layoutedBlocks.push(...t):this.layoutedBlocks=t}__onReceiveWatchData(t){this.__updatedList=t.data.updatedList}__listenEvents(){this.__eventIds=[this.target.on_([[k.REQUEST,this.layout,this],[k.AGAIN,this.layoutAgain,this],[_.DATA,this.__onReceiveWatchData,this]])]}__removeListenEvents(){this.target.off_(this.__eventIds)}destroy(){this.target&&(this.stop(),this.__removeListenEvents(),this.target=this.config=null)}}const ut=t.get("Renderer");class ft{get needFill(){return!(this.canvas.allowBackgroundColor||!this.config.fill)}constructor(t,e,i){this.FPS=60,this.totalTimes=0,this.times=0,this.config={usePartRender:!0,ceilPartPixel:!0,maxFPS:120},this.frames=[],this.target=t,this.canvas=e,i&&(this.config=n.default(i,this.config)),this.__listenEvents()}start(){this.running=!0,this.update(!1)}stop(){this.running=!1}update(t=!0){this.changed||(this.changed=t),this.requestTime||this.__requestRender()}requestLayout(){this.target.emit(k.REQUEST)}checkRender(){if(this.running){const{target:t}=this;t.isApp&&(t.emit(p.CHILD_START,t),t.children.forEach(t=>{t.renderer.FPS=this.FPS,t.renderer.checkRender()}),t.emit(p.CHILD_END,t)),this.changed&&this.canvas.view&&this.render(),this.target.emit(p.NEXT)}}render(t){if(!this.running||!this.canvas.view)return this.update();const{target:e}=this;this.times=0,this.totalBounds=new x,ut.log(e.innerName,"---\x3e");try{this.emitRender(p.START),this.renderOnce(t),this.emitRender(p.END,this.totalBounds),R.clearRecycled()}catch(t){this.rendering=!1,ut.error(t)}ut.log("-------------|")}renderAgain(){this.rendering?this.waitAgain=!0:this.renderOnce()}renderOnce(t){if(this.rendering)return ut.warn("rendering");if(this.times>3)return ut.warn("render max times");if(this.times++,this.totalTimes++,this.rendering=!0,this.changed=!1,this.renderBounds=new x,this.renderOptions={},t)this.emitRender(p.BEFORE),t();else{if(this.requestLayout(),this.ignore)return void(this.ignore=this.rendering=!1);this.emitRender(p.BEFORE),this.config.usePartRender&&this.totalTimes>1?this.partRender():this.fullRender()}this.emitRender(p.RENDER,this.renderBounds,this.renderOptions),this.emitRender(p.AFTER,this.renderBounds,this.renderOptions),this.updateBlocks=null,this.rendering=!1,this.waitAgain&&(this.waitAgain=!1,this.renderOnce())}partRender(){const{canvas:t,updateBlocks:e}=this;e&&(this.mergeBlocks(),e.forEach(e=>{t.bounds.hit(e)&&!e.isEmpty()&&this.clipRender(e)}))}clipRender(t){const e=B.start("PartRender"),{canvas:i}=this,s=t.getIntersect(i.bounds),n=new x(s);i.save(),s.spread(ft.clipSpread).ceil();const{ceilPartPixel:a}=this.config;i.clipWorld(s,a),i.clearWorld(s,a),this.__render(s,n),i.restore(),B.end(e)}fullRender(){const t=B.start("FullRender"),{canvas:e}=this;e.save(),e.clear(),this.__render(e.bounds),e.restore(),B.end(t)}__render(e,s){const{canvas:n,target:a}=this,r=e.includes(a.__world),o=r?{includes:r}:{bounds:e,includes:r};this.needFill&&n.fillWorld(e,this.config.fill),t.showRepaint&&t.drawRepaint(n,e),this.config.useCellRender&&(o.cellList=this.getCellList()),i.render(a,n,o),this.renderBounds=s=s||e,this.renderOptions=o,this.totalBounds.isEmpty()?this.totalBounds=s:this.totalBounds.add(s),n.updateRender(s)}getCellList(){}addBlock(t,e){this.updateBlocks||(this.updateBlocks=[]),this.updateBlocks.push(t)}mergeBlocks(){const{updateBlocks:t}=this;if(t){const e=new x;e.setList(t),t.length=0,t.push(e)}}__requestRender(){const t=this.target;if(this.requestTime||!t)return;if(t.parentApp)return t.parentApp.requestRender(!1);this.requestTime=this.frameTime||Date.now();const e=()=>{const t=1e3/((this.frameTime=Date.now())-this.requestTime),{maxFPS:s}=this.config;if(s&&t>s)return i.requestRender(e);const{frames:n}=this;n.length>30&&n.shift(),n.push(t),this.FPS=Math.round(n.reduce((t,e)=>t+e,0)/n.length),this.requestTime=0,this.checkRender()};i.requestRender(e)}__onResize(t){if(!this.canvas.unreal){if(t.bigger||!t.samePixelRatio){const{width:e,height:i}=t.old;if(!new x(0,0,e,i).includes(this.target.__world)||this.needFill||!t.samePixelRatio)return this.addBlock(this.canvas.bounds),void this.target.forceUpdate("surface")}this.addBlock(new x(0,0,1,1)),this.update()}}__onLayoutEnd(t){t.data&&t.data.map(t=>{let e;const{updatedList:i}=t;i&&i.list.some(t=>(e=!t.__world.width||!t.__world.height,e&&(t.isLeafer||ut.tip(t.innerName,": empty"),e=!t.isBranch||t.isBranchLeaf),e)),this.addBlock(e?this.canvas.bounds:t.updatedBounds,i)})}emitRender(t,e,i){this.target.emitEvent(new p(t,this.times,e,i))}__listenEvents(){this.__eventIds=[this.target.on_([[p.REQUEST,this.update,this],[k.END,this.__onLayoutEnd,this],[p.AGAIN,this.renderAgain,this],[o.RESIZE,this.__onResize,this]])]}__removeListenEvents(){this.target.off_(this.__eventIds)}destroy(){this.target&&(this.stop(),this.__removeListenEvents(),this.config={},this.target=this.canvas=null)}}function pt(t,e,i){t.__.__font?V.fillText(t,e,i):t.__.windingRule?e.fill(t.__.windingRule):e.fill()}function gt(t,e,i,s,n){const a=i.__;E(t)?V.drawStrokesStyle(t,e,!1,i,s,n):(s.setStroke(t,a.__strokeWidth*e,a),s.stroke()),a.__useArrow&&V.strokeArrow(t,i,s,n)}function _t(t,e,i,s,n){const a=i.__;E(t)?V.drawStrokesStyle(t,e,!0,i,s,n):(s.setStroke(t,a.__strokeWidth*e,a),V.drawTextStroke(i,s,n))}function wt(t,e,i,s,n){const a=s.getSameCanvas(!0,!0);a.font=i.__.__font,_t(t,2,i,a,n),a.blendMode="outside"===e?"destination-out":"destination-in",V.fillText(i,a,n),a.blendMode="normal",m.copyCanvasByWorld(i,s,a),a.recycle(i.__nowWorld)}ft.clipSpread=10,Object.assign(d,{watcher:(t,e)=>new tt(t,e),layouter:(t,e)=>new ht(t,e),renderer:(t,e,i)=>new ft(t,e,i),selector:(t,e)=>{},interaction:(t,e,i,s)=>{}}),i.layout=ht.fullLayout,i.render=function(t,e,i){const s=Object.assign(Object.assign({},i),{topRendering:!0});i.topList=new f,t.__render(e,i),i.topList.length&&i.topList.forEach(t=>t.__render(e,s))};const{getSpread:mt,copyAndSpread:yt,toOuterOf:vt,getOuterOf:xt,getByMove:bt,move:St,getIntersectData:kt}=L,Bt={};let Rt;const{stintSet:Et}=n,{hasTransparent:Lt}=X;function At(t,e,i){if(!E(e)||!1===e.visible||0===e.opacity)return;let 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