pdfjs-dist/build/pdf.worker.min.js

Generic build of Mozilla's PDF.js library.

/**
 * @licstart The following is the entire license notice for the
 * Javascript code in this page
 *
 * Copyright 2020 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @licend The above is the entire license notice for the
 * Javascript code in this page
 */
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e[t]<<8|e[t+1]};t.readUint32=function(e,t){return(e[t]<<24|e[t+1]<<16|e[t+2]<<8|e[t+3])>>>0};t.isWhiteSpace=function(e){return 32===e||9===e||13===e||10===e};t.XRefParseException=t.XRefEntryException=t.MissingDataException=void 0;var r=a(2);class i extends r.BaseException{constructor(e,t){super(`Missing data [${e}, ${t})`);this.begin=e;this.end=t}}t.MissingDataException=i;class n extends r.BaseException{}t.XRefEntryException=n;class s extends r.BaseException{}t.XRefParseException=s;const o=["","C","CC","CCC","CD","D","DC","DCC","DCCC","CM","","X","XX","XXX","XL","L","LX","LXX","LXXX","XC","","I","II","III","IV","V","VI","VII","VIII","IX"]},function(e,t,a){"use strict";Object.defineProperty(t,"__esModule",{value:!0});t.PDFDocument=t.Page=void 0;var r=a(2),i=a(10),n=a(5),s=a(8),o=a(12),c=a(25),l=a(22),h=a(11),u=a(26),d=a(27),f=a(41);const g=[0,0,612,792];function m(e,t){return"display"===t&&e.viewable||"print"===t&&e.printable}class p{constructor({pdfManager:e,xref:t,pageIndex:a,pageDict:r,ref:i,fontCache:n,builtInCMapCache:s,globalImageCache:o,pdfFunctionFactory:c}){this.pdfManager=e;this.pageIndex=a;this.pageDict=r;this.xref=t;this.ref=i;this.fontCache=n;this.builtInCMapCache=s;this.globalImageCache=o;this.pdfFunctionFactory=c;this.evaluatorOptions=e.evaluatorOptions;this.resourcesPromise=null;const l={obj:0};this.idFactory={createObjId:()=>`p${a}_${++l.obj}`,getDocId:()=>"g_"+e.docId}}_getInheritableProperty(e,t=!1){const a=(0,s.getInheritableProperty)({dict:this.pageDict,key:e,getArray:t,stopWhenFound:!1});return Array.isArray(a)?1!==a.length&&(0,n.isDict)(a[0])?n.Dict.merge(this.xref,a):a[0]:a}get content(){return this.pageDict.get("Contents")}get resources(){return(0,r.shadow)(this,"resources",this._getInheritableProperty("Resources")||n.Dict.empty)}_getBoundingBox(e){const t=this._getInheritableProperty(e,!0);if(Array.isArray(t)&&4===t.length){if(t[2]-t[0]!=0&&t[3]-t[1]!=0)return t;(0,r.warn)(`Empty /${e} entry.`)}return null}get mediaBox(){return(0,r.shadow)(this,"mediaBox",this._getBoundingBox("MediaBox")||g)}get cropBox(){return(0,r.shadow)(this,"cropBox",this._getBoundingBox("CropBox")||this.mediaBox)}get userUnit(){let e=this.pageDict.get("UserUnit");(!(0,r.isNum)(e)||e<=0)&&(e=1);return(0,r.shadow)(this,"userUnit",e)}get view(){const{cropBox:e,mediaBox:t}=this;let a;if(e===t||(0,r.isArrayEqual)(e,t))a=t;else{const i=r.Util.intersect(e,t);i&&i[2]-i[0]!=0&&i[3]-i[1]!=0?a=i:(0,r.warn)("Empty /CropBox and /MediaBox intersection.")}return(0,r.shadow)(this,"view",a||t)}get rotate(){let e=this._getInheritableProperty("Rotate")||0;e%90!=0?e=0:e>=360?e%=360:e<0&&(e=(e%360+360)%360);return(0,r.shadow)(this,"rotate",e)}getContentStream(){const e=this.content;let t;if(Array.isArray(e)){const a=this.xref,r=[];for(const t of e)r.push(a.fetchIfRef(t));t=new o.StreamsSequenceStream(r)}else t=(0,n.isStream)(e)?e:new o.NullStream;return t}loadResources(e){this.resourcesPromise||(this.resourcesPromise=this.pdfManager.ensure(this,"resources"));return this.resourcesPromise.then(()=>new i.ObjectLoader(this.resources,e,this.xref).load())}getOperatorList({handler:e,sink:t,task:a,intent:i,renderInteractiveForms:n}){const s=this.pdfManager.ensure(this,"getContentStream"),o=this.loadResources(["ExtGState","ColorSpace","Pattern","Shading","XObject","Font"]),c=new d.PartialEvaluator({xref:this.xref,handler:e,pageIndex:this.pageIndex,idFactory:this.idFactory,fontCache:this.fontCache,builtInCMapCache:this.builtInCMapCache,globalImageCache:this.globalImageCache,options:this.evaluatorOptions,pdfFunctionFactory:this.pdfFunctionFactory}),l=Promise.all([s,o]).then(([r])=>{const n=new u.OperatorList(i,t,this.pageIndex);e.send("StartRenderPage",{transparency:c.hasBlendModes(this.resources),pageIndex:this.pageIndex,intent:i});return c.getOperatorList({stream:r,task:a,resources:this.resources,operatorList:n}).then((function(){return n}))});return Promise.all([l,this._parsedAnnotations]).then((function([e,t]){if(0===t.length){e.flush(!0);return{length:e.totalLength}}const s=[];for(const e of t)m(e,i)&&s.push(e.getOperatorList(c,a,n).catch((function(e){(0,r.warn)(`getOperatorList - ignoring annotation data during "${a.name}" task: "${e}".`);return null})));return Promise.all(s).then((function(t){e.addOp(r.OPS.beginAnnotations,[]);for(const a of t)e.addOpList(a);e.addOp(r.OPS.endAnnotations,[]);e.flush(!0);return{length:e.totalLength}}))}))}extractTextContent({handler:e,task:t,normalizeWhitespace:a,sink:r,combineTextItems:i}){const n=this.pdfManager.ensure(this,"getContentStream"),s=this.loadResources(["ExtGState","XObject","Font"]);return Promise.all([n,s]).then(([n])=>new d.PartialEvaluator({xref:this.xref,handler:e,pageIndex:this.pageIndex,idFactory:this.idFactory,fontCache:this.fontCache,builtInCMapCache:this.builtInCMapCache,globalImageCache:this.globalImageCache,options:this.evaluatorOptions,pdfFunctionFactory:this.pdfFunctionFactory}).getTextContent({stream:n,task:t,resources:this.resources,normalizeWhitespace:a,combineTextItems:i,sink:r}))}getAnnotationsData(e){return this._parsedAnnotations.then((function(t){const a=[];for(let r=0,i=t.length;r<i;r++)e&&!m(t[r],e)||a.push(t[r].data);return a}))}get annotations(){return(0,r.shadow)(this,"annotations",this._getInheritableProperty("Annots")||[])}get _parsedAnnotations(){const e=this.pdfManager.ensure(this,"annotations").then(()=>{const e=[];for(const t of this.annotations)e.push(c.AnnotationFactory.create(this.xref,t,this.pdfManager,this.idFactory).catch((function(e){(0,r.warn)(`_parsedAnnotations: "${e}".`);return null})));return Promise.all(e).then((function(e){return e.filter(e=>!!e)}))});return(0,r.shadow)(this,"_parsedAnnotations",e)}}t.Page=p;const b=new Uint8Array([37,80,68,70,45]),y=new Uint8Array([115,116,97,114,116,120,114,101,102]),v=new Uint8Array([101,110,100,111,98,106]),w=/^[1-9]\.[0-9]$/;function k(e,t,a=1024,r=!1){const i=t.length,n=e.peekBytes(a),s=n.length-i;if(s<=0)return!1;if(r){const a=i-1;let r=n.length-1;for(;r>=a;){let s=0;for(;s<i&&n[r-s]===t[a-s];)s++;if(s>=i){e.pos+=r-a;return!0}r--}}else{let a=0;for(;a<=s;){let r=0;for(;r<i&&n[a+r]===t[r];)r++;if(r>=i){e.pos+=a;return!0}a++}}return!1}t.PDFDocument=class{constructor(e,t){let a;if((0,n.isStream)(t))a=t;else{if(!(0,r.isArrayBuffer)(t))throw new Error("PDFDocument: Unknown argument type");a=new o.Stream(t)}if(a.length<=0)throw new r.InvalidPDFException("The PDF file is empty, i.e. its size is zero bytes.");this.pdfManager=e;this.stream=a;this.xref=new i.XRef(a,e);this.pdfFunctionFactory=new f.PDFFunctionFactory({xref:this.xref,isEvalSupported:e.evaluatorOptions.isEvalSupported});this._pagePromises=[]}parse(e){this.setup(e);const t=this.catalog.catDict.get("Version");(0,n.isName)(t)&&(this.pdfFormatVersion=t.name);try{this.acroForm=this.catalog.catDict.get("AcroForm");if(this.acroForm){this.xfa=this.acroForm.get("XFA");const e=this.acroForm.get("Fields");Array.isArray(e)&&0!==e.length||this.xfa||(this.acroForm=null)}}catch(e){if(e instanceof s.MissingDataException)throw e;(0,r.info)("Cannot fetch AcroForm entry; assuming no AcroForms are present");this.acroForm=null}try{const e=this.catalog.catDict.get("Collection");(0,n.isDict)(e)&&e.getKeys().length>0&&(this.collection=e)}catch(e){if(e instanceof s.MissingDataException)throw e;(0,r.info)("Cannot fetch Collection dictionary.")}}get linearization(){let e=null;try{e=h.Linearization.create(this.stream)}catch(e){if(e instanceof s.MissingDataException)throw e;(0,r.info)(e)}return(0,r.shadow)(this,"linearization",e)}get startXRef(){const e=this.stream;let t=0;if(this.linearization){e.reset();k(e,v)&&(t=e.pos+6-e.start)}else{const a=1024,r=y.length;let i=!1,n=e.end;for(;!i&&n>0;){n-=a-r;n<0&&(n=0);e.pos=n;i=k(e,y,a,!0)}if(i){e.skip(9);let a;do{a=e.getByte()}while((0,s.isWhiteSpace)(a));let r="";for(;a>=32&&a<=57;){r+=String.fromCharCode(a);a=e.getByte()}t=parseInt(r,10);isNaN(t)&&(t=0)}}return(0,r.shadow)(this,"startXRef",t)}checkHeader(){const e=this.stream;e.reset();if(!k(e,b))return;e.moveStart();let t,a="";for(;(t=e.getByte())>32&&!(a.length>=12);)a+=String.fromCharCode(t);this.pdfFormatVersion||(this.pdfFormatVersion=a.substring(5))}parseStartXRef(){this.xref.setStartXRef(this.startXRef)}setup(e){this.xref.parse(e);this.catalog=new i.Catalog(this.pdfManager,this.xref)}get numPages(){const e=this.linearization,t=e?e.numPages:this.catalog.numPages;return(0,r.shadow)(this,"numPages",t)}get documentInfo(){const e={Title:r.isString,Author:r.isString,Subject:r.isString,Keywords:r.isString,Creator:r.isString,Producer:r.isString,CreationDate:r.isString,ModDate:r.isString,Trapped:n.isName};let t=this.pdfFormatVersion;if("string"!=typeof t||!w.test(t)){(0,r.warn)("Invalid PDF header version number: "+t);t=null}const a={PDFFormatVersion:t,IsLinearized:!!this.linearization,IsAcroFormPresent:!!this.acroForm,IsXFAPresent:!!this.xfa,IsCollectionPresent:!!this.collection};let i;try{i=this.xref.trailer.get("Info")}catch(e){if(e instanceof s.MissingDataException)throw e;(0,r.info)("The document information dictionary is invalid.")}if((0,n.isDict)(i))for(const t of i.getKeys()){const s=i.get(t);if(e[t])e[t](s)?a[t]="string"!=typeof s?s:(0,r.stringToPDFString)(s):(0,r.info)(`Bad value in document info for "${t}".`);else if("string"==typeof t){let e;if((0,r.isString)(s))e=(0,r.stringToPDFString)(s);else{if(!((0,n.isName)(s)||(0,r.isNum)(s)||(0,r.isBool)(s))){(0,r.info)(`Unsupported value in document info for (custom) "${t}".`);continue}e=s}a.Custom||(a.Custom=Object.create(null));a.Custom[t]=e}}return(0,r.shadow)(this,"documentInfo",a)}get fingerprint(){let e;const t=this.xref.trailer.get("ID");e=Array.isArray(t)&&t[0]&&(0,r.isString)(t[0])&&"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"!==t[0]?(0,r.stringToBytes)(t[0]):(0,l.calculateMD5)(this.stream.getByteRange(0,1024),0,1024);const a=[];for(let t=0,r=e.length;t<r;t++){const r=e[t].toString(16);a.push(r.padStart(2,"0"))}return(0,r.shadow)(this,"fingerprint",a.join(""))}_getLinearizationPage(e){const{catalog:t,linearization:a}=this,i=n.Ref.get(a.objectNumberFirst,0);return this.xref.fetchAsync(i).then(e=>{if((0,n.isDict)(e,"Page")||(0,n.isDict)(e)&&!e.has("Type")&&e.has("Contents")){i&&!t.pageKidsCountCache.has(i)&&t.pageKidsCountCache.put(i,1);return[e,i]}throw new r.FormatError("The Linearization dictionary doesn't point to a valid Page dictionary.")}).catch(a=>{(0,r.info)(a);return t.getPageDict(e)})}getPage(e){if(void 0!==this._pagePromises[e])return this._pagePromises[e];const{catalog:t,linearization:a}=this,r=a&&a.pageFirst===e?this._getLinearizationPage(e):t.getPageDict(e);return this._pagePromises[e]=r.then(([a,r])=>new p({pdfManager:this.pdfManager,xref:this.xref,pageIndex:e,pageDict:a,ref:r,fontCache:t.fontCache,builtInCMapCache:t.builtInCMapCache,globalImageCache:t.globalImageCache,pdfFunctionFactory:this.pdfFunctionFactory}))}checkFirstPage(){return this.getPage(0).catch(async e=>{if(e instanceof s.XRefEntryException){this._pagePromises.length=0;await this.cleanup();throw new s.XRefParseException}})}fontFallback(e,t){return this.catalog.fontFallback(e,t)}async cleanup(e=!1){return this.catalog?this.catalog.cleanup(e):(0,n.clearPrimitiveCaches)()}}},function(e,t,a){"use strict";Object.defineProperty(t,"__esModule",{value:!0});t.FileSpec=t.XRef=t.ObjectLoader=t.Catalog=void 0;var r=a(2),i=a(5),n=a(11),s=a(8),o=a(22),c=a(23),l=a(24);function h(e){return(0,i.isDict)(e)?e.get("D"):e}class u{constructor(e,t){this.pdfManager=e;this.xref=t;this.catDict=t.getCatalogObj();if(!(0,i.isDict)(this.catDict))throw new r.FormatError("Catalog object is not a dictionary.");this.fontCache=new i.RefSetCache;this.builtInCMapCache=new Map;this.globalImageCache=new l.GlobalImageCache;this.pageKidsCountCache=new i.RefSetCache}get metadata(){const e=this.catDict.getRaw("Metadata");if(!(0,i.isRef)(e))return(0,r.shadow)(this,"metadata",null);const t=!(this.xref.encrypt&&this.xref.encrypt.encryptMetadata),a=this.xref.fetch(e,t);let n;if(a&&(0,i.isDict)(a.dict)){const e=a.dict.get("Type"),t=a.dict.get("Subtype");if((0,i.isName)(e,"Metadata")&&(0,i.isName)(t,"XML"))try{n=(0,r.stringToUTF8String)((0,r.bytesToString)(a.getBytes()))}catch(e){if(e instanceof s.MissingDataException)throw e;(0,r.info)("Skipping invalid metadata.")}}return(0,r.shadow)(this,"metadata",n)}get toplevelPagesDict(){const e=this.catDict.get("Pages");if(!(0,i.isDict)(e))throw new r.FormatError("Invalid top-level pages dictionary.");return(0,r.shadow)(this,"toplevelPagesDict",e)}get documentOutline(){let e=null;try{e=this._readDocumentOutline()}catch(e){if(e instanceof s.MissingDataException)throw e;(0,r.warn)("Unable to read document outline.")}return(0,r.shadow)(this,"documentOutline",e)}_readDocumentOutline(){let e=this.catDict.get("Outlines");if(!(0,i.isDict)(e))return null;e=e.getRaw("First");if(!(0,i.isRef)(e))return null;const t={items:[]},a=[{obj:e,parent:t}],n=new i.RefSet;n.put(e);const s=this.xref,o=new Uint8ClampedArray(3);for(;a.length>0;){const t=a.shift(),l=s.fetchIfRef(t.obj);if(null=