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pagedjs

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Chunks up a document into paged media flows and applies print styles

pagedmedia.org

4 lines • 503 kB
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/** * @license Paged.js v0.4.3 | MIT | https://gitlab.coko.foundation/pagedjs/pagedjs */ !function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):(e="undefined"!=typeof globalThis?globalThis:e||self).PagedPolyfill=t()}(this,(function(){"use strict";function e(e){return e&&e.__esModule&&Object.prototype.hasOwnProperty.call(e,"default")?e.default:e}var t,n,r={exports:{}},a={exports:{}};var i,o,s,l,d=function(){},p=d(),c=function(e){return e!==p&&null!==e};function u(){return l||(l=1,s=(n?t:(n=1,t=function(){try{return Object.keys("primitive"),!0}catch(e){return!1}}))()?Object.keys:function(){if(o)return i;o=1;var e=c,t=Object.keys;return i=function(n){return t(e(n)?Object(n):n)}}()),s}var m,h,g=c,f=function(e){if(!g(e))throw new TypeError("Cannot use null or undefined");return e};var y,b,S=function(){var e,t=Object.assign;return"function"==typeof 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n=window.getComputedStyle(o);t="none"!==n.getPropertyValue("float"),l="avoid"===n.getPropertyValue("break-inside"),d="avoid"===o.dataset.breakBefore||"avoid"===o.dataset.previousBreakAfter,p=d&&$(o,e),c="BR"===o.tagName||"WBR"===o.tagName}let a;if(a="TR"===o.nodeName?o:me(o,"TR",e),a){let t=a.parentElement;if(["TBODY","THEAD"].includes(t.nodeName)){"avoid"===window.getComputedStyle(t).getPropertyValue("break-inside")&&(p=t)}const n=me(a,"TABLE",e),r=n.querySelector("[colspan]");if(n&&r){let e=0;for(const t of Array.from(n.rows[0].cells))e+=parseInt(t.getAttribute("colspan")||"1");if(a.cells.length!==e){let t,n=a.previousElementSibling;for(;null!==n;){t=0;for(const e of Array.from(n.cells))t+=parseInt(e.getAttribute("colspan")||"1");if(t===e)break;n=n.previousElementSibling}t===e&&(p=n)}}}if(p){r=document.createRange(),r.selectNode(p);break}if(!c&&!t&&F(o)){r=document.createRange(),r.selectNode(o);break}if(V(o)&&o.textContent.trim().length){r=document.createRange(),r.selectNode(o);break}}if(!r&&V(o)&&o.textContent.trim().length&&!ue(o.parentNode)){let e,t=q(o);n=0,b=0;for(var y=0;y!=t.length;y++)e=t[y],e.width>0&&(!n||e.left>n)&&(n=e.left),e.height>0&&(!b||e.top>b)&&(b=e.top);if(n>=m||b>=g){r=document.createRange(),s=this.textBreak(o,u,m,h,g),s?r.setStart(o,s):r=void 0;break}}(l||i<=m&&S<=g)&&(a=H(o,e),a&&(f=U(a,e)))}return r?(r.setEndAfter(e.lastChild),r):void 0}findEndToken(e,t){if(0===e.childNodes.length)return;let n,r=e.lastChild;for(;r&&r.lastChild;)if(ae(r)){if(!ae(r.lastChild)){r=ie(r.lastChild);break}r=r.lastChild}else r=r.previousSibling;V(r)&&(r.parentNode.dataset.ref?(n=function(e){let t=e.parentNode;return t?Array.prototype.indexOf.call(t.childNodes,e):0}(r),r=r.parentNode):r=r.previousSibling);let a=re(r,t);n&&(a=a.childNodes[n]);let i=H(a);return this.breakAt(i)}textBreak(e,t,n,r,a){let i,o,s,l,d,p=function*(e){let t,n,r=e.nodeValue,a=r.length,i=0;const o=e.parentElement&&"PRE"===e.parentElement.nodeName;for(;i<a;)t=r[i],/^[\S\u202F\u00A0]$/.test(t)||o?n||(n=document.createRange(),n.setStart(e,i)):n&&(n.setEnd(e,i),yield n,n=void 0),i+=1;n&&(n.setEnd(e,i),yield n)}(e),c=0,u=0,m=0,h=0;for(;!s&&(o=p.next(),i=o.value,s=o.done,i);){if(l=P(i),c=Math.floor(l.left),u=Math.floor(l.right),m=Math.floor(l.top),h=Math.floor(l.bottom),c>=n||m>=a){d=i.startOffset;break}if(u>n||h>a){let e,t,r,o=te(i);for(;!r&&(t=o.next(),e=t.value,r=t.done,e);)if(l=P(e),c=Math.floor(l.left),m=Math.floor(l.top),c>=n||m>=a){d=e.startOffset,s=!0;break}}}return d}removeOverflow(e,t){let{startContainer:n}=e,r=e.extractContents();return this.hyphenateAtBreak(n,t),r}hyphenateAtBreak(e,t){if(V(e)){let 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o.style.columnWidth=Math.round(l.width)+"px",o.style.columnGap="calc(var(--pagedjs-margin-right) + var(--pagedjs-margin-left) + var(--pagedjs-bleed-right) + var(--pagedjs-bleed-left) + var(--pagedjs-column-gap-offset))",this.width=Math.round(l.width),this.height=Math.round(l.height),this.element=n,this.pagebox=i,this.area=o,this.footnotesArea=s,n}createWrapper(){let e=document.createElement("div");return this.area.appendChild(e),this.wrapper=e,e}index(e){this.position=e;let t=this.element,n=e+1,r=`page-${n}`;this.id=r,t.dataset.pageNumber=n,t.setAttribute("id",r),this.name&&t.classList.add("pagedjs_"+this.name+"_page"),this.blank&&t.classList.add("pagedjs_blank_page"),0===e&&t.classList.add("pagedjs_first_page"),e%2!=1?(t.classList.remove("pagedjs_left_page"),t.classList.add("pagedjs_right_page")):(t.classList.remove("pagedjs_right_page"),t.classList.add("pagedjs_left_page"))}async layout(e,t,n){this.clear(),this.startToken=t;let r=this.settings;!r.maxChars&&n&&(r.maxChars=n),this.layoutMethod=new Se(this.area,this.hooks,r);let a=(await this.layoutMethod.renderTo(this.wrapper,e,t)).breakToken;return this.addListeners(e),this.endToken=a,a}async append(e,t){if(!this.layoutMethod)return this.layout(e,t);let n=(await this.layoutMethod.renderTo(this.wrapper,e,t)).breakToken;return this.endToken=n,n}getByParent(e,t){let n;for(var r=0;r<t.length;r++)if(n=t[r],n.dataset.ref===e)return n}onOverflow(e){this._onOverflow=e}onUnderflow(e){this._onUnderflow=e}clear(){this.removeListeners(),this.wrapper&&this.wrapper.remove(),this.createWrapper()}addListeners(e){return"undefined"!=typeof ResizeObserver?this.addResizeObserver(e):(this._checkOverflowAfterResize=this.checkOverflowAfterResize.bind(this,e),this.element.addEventListener("overflow",this._checkOverflowAfterResize,!1),this.element.addEventListener("underflow",this._checkOverflowAfterResize,!1)),this._onScroll=function(){this.listening&&(this.element.scrollLeft=0)}.bind(this),this.element.addEventListener("scroll",this._onScroll),this.listening=!0,!0}removeListeners(){this.listening=!1,"undefined"!=typeof ResizeObserver&&this.ro?this.ro.disconnect():this.element&&(this.element.removeEventListener("overflow",this._checkOverflowAfterResize,!1),this.element.removeEventListener("underflow",this._checkOverflowAfterResize,!1)),this.element&&this.element.removeEventListener("scroll",this._onScroll)}addResizeObserver(e){let t=this.wrapper,n=t.getBoundingClientRect().height;this.ro=new ResizeObserver((r=>{this.listening&&requestAnimationFrame((()=>{for(let a of r){const r=a.contentRect;r.height>n?(this.checkOverflowAfterResize(e),n=t.getBoundingClientRect().height):r.height<n&&(this.checkUnderflowAfterResize(e),n=r.height)}}))})),this.ro.observe(t)}checkOverflowAfterResize(e){if(!this.listening||!this.layoutMethod)return;let t=this.layoutMethod.findBreakToken(this.wrapper,e,this.startToken);t&&(this.endToken=t,this._onOverflow&&this._onOverflow(t))}checkUnderflowAfterResize(e){if(!this.listening||!this.layoutMethod)return;let t=this.layoutMethod.findEndToken(this.wrapper,e);t&&this._onUnderflow&&this._onUnderflow(t)}destroy(){this.removeListeners(),this.element.remove(),this.element=void 0,this.wrapper=void 0}}L(ve.prototype);class xe{constructor(e,t){return e&&e.nodeType?this.dom=this.add(e):"string"==typeof e&&(this.dom=this.parse(e)),this.dom}parse(e,t){let n=document.createRange().createContextualFragment(e);return this.addRefs(n),n}add(e){return this.addRefs(e),e}addRefs(e){var t=document.createTreeWalker(e,NodeFilter.SHOW_ELEMENT,null,!1);let n=t.nextNode();for(;n;){if(!n.hasAttribute("data-ref")){let e=M();n.setAttribute("data-ref",e)}n.id&&n.setAttribute("data-id",n.id),n=t.nextNode()}}find(e){return this.refs[e]}destroy(){this.refs=void 0,this.dom=void 0}}class ke{constructor(e){this._q=[],this.context=e,this.tick=requestAnimationFrame,this.running=!1,this.paused=!1}enqueue(){var e,t,n=[].shift.call(arguments),r=arguments;if(!n)throw new Error("No Task Provided");return t="function"==typeof n?{task:n,args:r,deferred:e=new R,promise:e.promise}:{promise:n},this._q.push(t),0!=this.paused||this.running||this.run(),t.promise}dequeue(){var e,t,n;return!this._q.length||this.paused?((e=new R).deferred.resolve(),e.promise):(t=(e=this._q.shift()).task)?(n=t.apply(this.context,e.args))&&"function"==typeof n.then?n.then(function(){e.deferred.resolve.apply(this.context,arguments)}.bind(this),function(){e.deferred.reject.apply(this.context,arguments)}.bind(this)):(e.deferred.resolve.apply(this.context,n),e.promise):e.promise?e.promise:void 0}dump(){for(;this._q.length;)this.dequeue()}run(){return this.running||(this.running=!0,this.defered=new R),this.tick.call(window,(()=>{this._q.length?this.dequeue().then(function(){this.run()}.bind(this)):(this.defered.resolve(),this.running=void 0)})),1==this.paused&&(this.paused=!1),this.defered.promise}flush(){return this.running?this.running:this._q.length?(this.running=this.dequeue().then(function(){return this.running=void 0,this.flush()}.bind(this)),this.running):void 0}clear(){this._q=[]}length(){return this._q.length}pause(){this.paused=!0}stop(){this._q=[],this.running=!1,this.paused=!0}}class we{constructor(e,t,n){this.settings=n||{},this.hooks={},this.hooks.beforeParsed=new B(this),this.hooks.filter=new B(this),this.hooks.afterParsed=new B(this),this.hooks.beforePageLayout=new B(this),this.hooks.onPageLayout=new B(this),this.hooks.layout=new B(this),this.hooks.renderNode=new B(this),this.hooks.layoutNode=new B(this),this.hooks.onOverflow=new B(this),this.hooks.afterOverflowRemoved=new B(this),this.hooks.onBreakToken=new B,this.hooks.beforeRenderResult=new B(this),this.hooks.afterPageLayout=new B(this),this.hooks.finalizePage=new B(this),this.hooks.afterRendered=new B(this),this.pages=[],this.total=0,this.q=new ke(this),this.stopped=!1,this.rendered=!1,this.content=e,this.charsPerBreak=[],this.maxChars,e&&this.flow(e,t)}setup(e){this.pagesArea=document.createElement("div"),this.pagesArea.classList.add("pagedjs_pages"),e?e.appendChild(this.pagesArea):document.querySelector("body").appendChild(this.pagesArea),this.pageTemplate=document.createElement("template"),this.pageTemplate.innerHTML='\n<div class="pagedjs_page">\n\t<div class="pagedjs_sheet">\n\t\t<div class="pagedjs_bleed pagedjs_bleed-top">\n\t\t\t<div class="pagedjs_marks-crop"></div>\n\t\t\t<div class="pagedjs_marks-middle">\n\t\t\t\t<div class="pagedjs_marks-cross"></div>\n\t\t\t</div>\n\t\t\t<div class="pagedjs_marks-crop"></div>\n\t\t</div>\n\t\t<div class="pagedjs_bleed pagedjs_bleed-bottom">\n\t\t\t<div class="pagedjs_marks-crop"></div>\n\t\t\t<div class="pagedjs_marks-middle">\n\t\t\t\t<div class="pagedjs_marks-cross"></div>\n\t\t\t</div>\t\t<div class="pagedjs_marks-crop"></div>\n\t\t</div>\n\t\t<div class="pagedjs_bleed pagedjs_bleed-left">\n\t\t\t<div class="pagedjs_marks-crop"></div>\n\t\t\t<div class="pagedjs_marks-middle">\n\t\t\t\t<div class="pagedjs_marks-cross"></div>\n\t\t\t</div>\t\t<div class="pagedjs_marks-crop"></div>\n\t\t</div>\n\t\t<div class="pagedjs_bleed pagedjs_bleed-right">\n\t\t\t<div class="pagedjs_marks-crop"></div>\n\t\t\t<div class="pagedjs_marks-middle">\n\t\t\t\t<div class="pagedjs_marks-cross"></div>\n\t\t\t</div>\n\t\t\t<div class="pagedjs_marks-crop"></div>\n\t\t</div>\n\t\t<div class="pagedjs_pagebox">\n\t\t\t<div class="pagedjs_margin-top-left-corner-holder">\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-top-left-corner"><div class="pagedjs_margin-content"></div></div>\n\t\t\t</div>\n\t\t\t<div class="pagedjs_margin-top">\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-top-left"><div class="pagedjs_margin-content"></div></div>\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-top-center"><div class="pagedjs_margin-content"></div></div>\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-top-right"><div class="pagedjs_margin-content"></div></div>\n\t\t\t</div>\n\t\t\t<div class="pagedjs_margin-top-right-corner-holder">\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-top-right-corner"><div class="pagedjs_margin-content"></div></div>\n\t\t\t</div>\n\t\t\t<div class="pagedjs_margin-right">\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-right-top"><div class="pagedjs_margin-content"></div></div>\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-right-middle"><div class="pagedjs_margin-content"></div></div>\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-right-bottom"><div class="pagedjs_margin-content"></div></div>\n\t\t\t</div>\n\t\t\t<div class="pagedjs_margin-left">\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-left-top"><div class="pagedjs_margin-content"></div></div>\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-left-middle"><div class="pagedjs_margin-content"></div></div>\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-left-bottom"><div class="pagedjs_margin-content"></div></div>\n\t\t\t</div>\n\t\t\t<div class="pagedjs_margin-bottom-left-corner-holder">\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-bottom-left-corner"><div class="pagedjs_margin-content"></div></div>\n\t\t\t</div>\n\t\t\t<div class="pagedjs_margin-bottom">\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-bottom-left"><div class="pagedjs_margin-content"></div></div>\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-bottom-center"><div class="pagedjs_margin-content"></div></div>\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-bottom-right"><div class="pagedjs_margin-content"></div></div>\n\t\t\t</div>\n\t\t\t<div class="pagedjs_margin-bottom-right-corner-holder">\n\t\t\t\t<div class="pagedjs_margin pagedjs_margin-bottom-right-corner"><div class="pagedjs_margin-content"></div></div>\n\t\t\t</div>\n\t\t\t<div class="pagedjs_area">\n\t\t\t\t<div class="pagedjs_page_content"></div>\n\t\t\t\t<div class="pagedjs_footnote_area">\n\t\t\t\t\t<div class="pagedjs_footnote_content pagedjs_footnote_empty">\n\t\t\t\t\t\t<div class="pagedjs_footnote_inner_content"></div>\n\t\t\t\t\t</div>\n\t\t\t\t</div>\n\t\t\t</div>\n\t\t</div>\n\t</div>\n</div>'}async flow(e,t){let n;await this.hooks.beforeParsed.trigger(e,this),n=new xe(e),this.hooks.filter.triggerSync(n),this.source=n,this.breakToken=void 0,this.pagesArea&&this.pageTemplate?(this.q.clear(),this.removePages()):this.setup(t),this.emit("rendering",n),await this.hooks.afterParsed.trigger(n,this),await this.loadFonts();let r=await this.render(n,this.breakToken);for(;r.canceled;)this.start(),r=await this.render(n,this.breakToken);return this.rendered=!0,this.pagesArea.style.setProperty("--pagedjs-page-count",this.total),await this.hooks.afterRendered.trigger(this.pages,this),this.emit("rendered",this.pages),this}async render(e,t){let n,r=this.layout(e,t),a=!1;for(;!a;)n=await this.q.enqueue((()=>this.renderAsync(r))),a=n.done;return n}start(){this.rendered=!1,this.stopped=!1}stop(){this.stopped=!0}renderOnIdle(e){return new Promise((t=>{N((async()=>{if(this.stopped)return t({done:!0,canceled:!0});let n=await e.next();this.stopped?t({done:!0,canceled:!0}):t(n)}))}))}async renderAsync(e){if(this.stopped)return{done:!0,canceled:!0};let t=await e.next();return this.stopped?{done:!0,canceled:!0}:t}async handleBreaks(e,t){let n,r,a,i=this.total+1,o=i%2==0?"left":"right",s=i%2==0?"verso":"recto";1!==i&&(e&&void 0!==e.dataset&&void 0!==e.dataset.previousBreakAfter&&(n=e.dataset.previousBreakAfter),e&&void 0!==e.dataset&&void 0!==e.dataset.breakBefore&&(r=e.dataset.breakBefore),t?a=this.addPage(!0):(!n||"left"!==n&&"right"!==n||n===o)&&(!n||"verso"!==n&&"recto"!==n||n===s)&&(!r||"left"!==r&&"right"!==r||r===o)&&(!r||"verso"!==r&&"recto"!==r||r===s)||(a=this.addPage(!0)),a&&(await this.hooks.beforePageLayout.trigger(a,void 0,void 0,this),this.emit("page",a),await this.hooks.afterPageLayout.trigger(a.element,a,void 0,this),await this.hooks.finalizePage.trigger(a.element,a,void 0,this),this.emit("renderedPage",a)))}async*layout(e,t){let n=t||!1,r=[];for(;void 0!==n;){n&&n.node?await this.handleBreaks(n.node):await this.handleBreaks(e.firstChild);let t=this.addPage();if(await this.hooks.beforePageLayout.trigger(t,e,n,this),this.emit("page",t),n=await t.layout(e,n,this.maxChars),n){let e=n.toJSON(!0);if(r.lastIndexOf(e)>-1){let e=new be("Layout repeated",[n.node]);return console.error("Layout repeated at: ",n.node),e}r.push(e)}await this.hooks.afterPageLayout.trigger(t.element,t,n,this),await this.hooks.finalizePage.trigger(t.element,t,void 0,this),this.emit("renderedPage",t),this.recoredCharLength(t.wrapper.textContent.length),yield n}}recoredCharLength(e){0!==e&&(this.charsPerBreak.push(e),this.charsPerBreak.length>4&&this.charsPerBreak.shift(),this.maxChars=this.charsPerBreak.reduce(((e,t)=>e+t),0)/this.charsPerBreak.length)}removePages(e=0){if(!(e>=this.pages.length)){for(let t=e;t<this.pages.length;t++)this.pages[t].destroy();e>0?this.pages.splice(e):this.pages=[],this.total=this.pages.length}}addPage(e){let t=this.pages[this.pages.length-1],n=new ve(this.pagesArea,this.pageTemplate,e,this.hooks,this.settings);return this.pages.push(n),n.create(void 0,t&&t.element),n.index(this.total),e||(n.onOverflow((e=>{if(console.warn("overflow on",n.id,e),this.rendered)return;let t=this.pages.indexOf(n)+1;this.stop(),this.breakToken=e,this.removePages(t),!0===this.rendered&&(this.rendered=!1,this.q.enqueue((async()=>{this.start(),await this.render(this.source,this.breakToken),this.rendered=!0})))})),n.onUnderflow((e=>{}))),this.total=this.pages.length,n}async clonePage(e){let t=this.pages[this.pages.length-1],n=new ve(this.pagesArea,this.pageTemplate,!1,this.hooks);this.pages.push(n),n.create(void 0,t&&t.element),n.index(this.total),await this.hooks.beforePageLayout.trigger(n,void 0,void 0,this),this.emit("page",n);for(const t of e.element.classList)"pagedjs_left_page"!==t&&"pagedjs_right_page"!==t&&n.element.classList.add(t);await this.hooks.afterPageLayout.trigger(n.element,n,void 0,this),await this.hooks.finalizePage.trigger(n.element,n,void 0,this),this.emit("renderedPage",n)}loadFonts(){let e=[];return(document.fonts||[]).forEach((t=>{if("loaded"!==t.status){let n=t.load().then((e=>t.family),(e=>(console.warn("Failed to 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