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1 line
1.5 KiB
JavaScript
1 line
1.5 KiB
JavaScript
import PDFAbstractReference from"./PDFAbstractReference.min.js";const pad=(e,t)=>(Array(t+1).join("0")+e).slice(-t),escapableRe=/[\n\r\t\b\f()\\]/g,escapable={"\n":"\\n","\r":"\\r","\t":"\\t","\b":"\\b","\f":"\\f","\\":"\\\\","(":"\\(",")":"\\)"},swapBytes=e=>e.swap16();export default class PDFObject{static convert(t,a=null){if("string"==typeof t)return"/"+t;if(t instanceof String){let r=t,n=!1;for(let e=0,t=r.length;e<t;e+=1)if(127<r.charCodeAt(e)){n=!0;break}let e;return e=n?swapBytes(Buffer.from(``+r,"utf16le")):Buffer.from(r,"ascii"),`(${r=(r=(a?a(e):e).toString("binary")).replace(escapableRe,e=>escapable[e])})`}if(Buffer.isBuffer(t))return`<${t.toString("hex")}>`;if(t instanceof PDFAbstractReference)return t.toString();if(t instanceof Date){let e=`D:${pad(t.getUTCFullYear(),4)}${pad(t.getUTCMonth()+1,2)}${pad(t.getUTCDate(),2)}${pad(t.getUTCHours(),2)}${pad(t.getUTCMinutes(),2)}${pad(t.getUTCSeconds(),2)}Z`;return`(${e=a?(e=a(Buffer.from(e,"ascii")).toString("binary")).replace(escapableRe,e=>escapable[e]):e})`}if(Array.isArray(t))return`[${t.map(e=>PDFObject.convert(e,a)).join(" ")}]`;if("[object Object]"!=={}.toString.call(t))return"number"==typeof t?PDFObject.number(t):""+t;{const n=["<<"];return Object.entries(t).forEach(([e,t])=>{let r="";r=t&&-1!==t.toString().indexOf("<<")?t:PDFObject.convert(t,a),n.push(`/${e} `+r)}),n.push(">>"),n.join("\n")}}static number(e){if(-1e21<e&&e<1e21)return Math.round(1e6*e)/1e6;throw new Error("unsupported number: "+e)}} |