pdfjs-dist
Version:
Generic build of Mozilla's PDF.js library.
483 lines (482 loc) • 14.3 kB
JavaScript
/**
* @licstart The following is the entire license notice for the
* JavaScript code in this page
*
* Copyright 2022 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
*/
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.XRefParseException = exports.XRefEntryException = exports.ParserEOFException = exports.PDF_VERSION_REGEXP = exports.MissingDataException = exports.DocStats = void 0;
exports.collectActions = collectActions;
exports.encodeToXmlString = encodeToXmlString;
exports.escapePDFName = escapePDFName;
exports.escapeString = escapeString;
exports.getArrayLookupTableFactory = getArrayLookupTableFactory;
exports.getInheritableProperty = getInheritableProperty;
exports.getLookupTableFactory = getLookupTableFactory;
exports.getNewAnnotationsMap = getNewAnnotationsMap;
exports.getRotationMatrix = getRotationMatrix;
exports.isAscii = isAscii;
exports.isWhiteSpace = isWhiteSpace;
exports.log2 = log2;
exports.numberToString = numberToString;
exports.parseXFAPath = parseXFAPath;
exports.readInt8 = readInt8;
exports.readUint16 = readUint16;
exports.readUint32 = readUint32;
exports.recoverJsURL = recoverJsURL;
exports.stringToUTF16HexString = stringToUTF16HexString;
exports.stringToUTF16String = stringToUTF16String;
exports.toRomanNumerals = toRomanNumerals;
exports.validateCSSFont = validateCSSFont;
var _util = require("../shared/util.js");
var _primitives = require("./primitives.js");
var _base_stream = require("./base_stream.js");
const PDF_VERSION_REGEXP = /^[1-9]\.\d$/;
exports.PDF_VERSION_REGEXP = PDF_VERSION_REGEXP;
function getLookupTableFactory(initializer) {
let lookup;
return function () {
if (initializer) {
lookup = Object.create(null);
initializer(lookup);
initializer = null;
}
return lookup;
};
}
function getArrayLookupTableFactory(initializer) {
let lookup;
return function () {
if (initializer) {
let arr = initializer();
initializer = null;
lookup = Object.create(null);
for (let i = 0, ii = arr.length; i < ii; i += 2) {
lookup[arr[i]] = arr[i + 1];
}
arr = null;
}
return lookup;
};
}
class MissingDataException extends _util.BaseException {
constructor(begin, end) {
super(`Missing data [${begin}, ${end})`, "MissingDataException");
this.begin = begin;
this.end = end;
}
}
exports.MissingDataException = MissingDataException;
class ParserEOFException extends _util.BaseException {
constructor(msg) {
super(msg, "ParserEOFException");
}
}
exports.ParserEOFException = ParserEOFException;
class XRefEntryException extends _util.BaseException {
constructor(msg) {
super(msg, "XRefEntryException");
}
}
exports.XRefEntryException = XRefEntryException;
class XRefParseException extends _util.BaseException {
constructor(msg) {
super(msg, "XRefParseException");
}
}
exports.XRefParseException = XRefParseException;
class DocStats {
constructor(handler) {
this._handler = handler;
this._streamTypes = new Set();
this._fontTypes = new Set();
}
_send() {
const streamTypes = Object.create(null),
fontTypes = Object.create(null);
for (const type of this._streamTypes) {
streamTypes[type] = true;
}
for (const type of this._fontTypes) {
fontTypes[type] = true;
}
this._handler.send("DocStats", {
streamTypes,
fontTypes
});
}
addStreamType(type) {
if (this._streamTypes.has(type)) {
return;
}
this._streamTypes.add(type);
this._send();
}
addFontType(type) {
if (this._fontTypes.has(type)) {
return;
}
this._fontTypes.add(type);
this._send();
}
}
exports.DocStats = DocStats;
function getInheritableProperty({
dict,
key,
getArray = false,
stopWhenFound = true
}) {
let values;
const visited = new _primitives.RefSet();
while (dict instanceof _primitives.Dict && !(dict.objId && visited.has(dict.objId))) {
if (dict.objId) {
visited.put(dict.objId);
}
const value = getArray ? dict.getArray(key) : dict.get(key);
if (value !== undefined) {
if (stopWhenFound) {
return value;
}
if (!values) {
values = [];
}
values.push(value);
}
dict = dict.get("Parent");
}
return values;
}
const ROMAN_NUMBER_MAP = ["", "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 toRomanNumerals(number, lowerCase = false) {
(0, _util.assert)(Number.isInteger(number) && number > 0, "The number should be a positive integer.");
const romanBuf = [];
let pos;
while (number >= 1000) {
number -= 1000;
romanBuf.push("M");
}
pos = number / 100 | 0;
number %= 100;
romanBuf.push(ROMAN_NUMBER_MAP[pos]);
pos = number / 10 | 0;
number %= 10;
romanBuf.push(ROMAN_NUMBER_MAP[10 + pos]);
romanBuf.push(ROMAN_NUMBER_MAP[20 + number]);
const romanStr = romanBuf.join("");
return lowerCase ? romanStr.toLowerCase() : romanStr;
}
function log2(x) {
if (x <= 0) {
return 0;
}
return Math.ceil(Math.log2(x));
}
function readInt8(data, offset) {
return data[offset] << 24 >> 24;
}
function readUint16(data, offset) {
return data[offset] << 8 | data[offset + 1];
}
function readUint32(data, offset) {
return (data[offset] << 24 | data[offset + 1] << 16 | data[offset + 2] << 8 | data[offset + 3]) >>> 0;
}
function isWhiteSpace(ch) {
return ch === 0x20 || ch === 0x09 || ch === 0x0d || ch === 0x0a;
}
function parseXFAPath(path) {
const positionPattern = /(.+)\[(\d+)\]$/;
return path.split(".").map(component => {
const m = component.match(positionPattern);
if (m) {
return {
name: m[1],
pos: parseInt(m[2], 10)
};
}
return {
name: component,
pos: 0
};
});
}
function escapePDFName(str) {
const buffer = [];
let start = 0;
for (let i = 0, ii = str.length; i < ii; i++) {
const char = str.charCodeAt(i);
if (char < 0x21 || char > 0x7e || char === 0x23 || char === 0x28 || char === 0x29 || char === 0x3c || char === 0x3e || char === 0x5b || char === 0x5d || char === 0x7b || char === 0x7d || char === 0x2f || char === 0x25) {
if (start < i) {
buffer.push(str.substring(start, i));
}
buffer.push(`#${char.toString(16)}`);
start = i + 1;
}
}
if (buffer.length === 0) {
return str;
}
if (start < str.length) {
buffer.push(str.substring(start, str.length));
}
return buffer.join("");
}
function escapeString(str) {
return str.replace(/([()\\\n\r])/g, match => {
if (match === "\n") {
return "\\n";
} else if (match === "\r") {
return "\\r";
}
return `\\${match}`;
});
}
function _collectJS(entry, xref, list, parents) {
if (!entry) {
return;
}
let parent = null;
if (entry instanceof _primitives.Ref) {
if (parents.has(entry)) {
return;
}
parent = entry;
parents.put(parent);
entry = xref.fetch(entry);
}
if (Array.isArray(entry)) {
for (const element of entry) {
_collectJS(element, xref, list, parents);
}
} else if (entry instanceof _primitives.Dict) {
if ((0, _primitives.isName)(entry.get("S"), "JavaScript")) {
const js = entry.get("JS");
let code;
if (js instanceof _base_stream.BaseStream) {
code = js.getString();
} else if (typeof js === "string") {
code = js;
}
code = code && (0, _util.stringToPDFString)(code).replace(/\u0000/g, "");
if (code) {
list.push(code);
}
}
_collectJS(entry.getRaw("Next"), xref, list, parents);
}
if (parent) {
parents.remove(parent);
}
}
function collectActions(xref, dict, eventType) {
const actions = Object.create(null);
const additionalActionsDicts = getInheritableProperty({
dict,
key: "AA",
stopWhenFound: false
});
if (additionalActionsDicts) {
for (let i = additionalActionsDicts.length - 1; i >= 0; i--) {
const additionalActions = additionalActionsDicts[i];
if (!(additionalActions instanceof _primitives.Dict)) {
continue;
}
for (const key of additionalActions.getKeys()) {
const action = eventType[key];
if (!action) {
continue;
}
const actionDict = additionalActions.getRaw(key);
const parents = new _primitives.RefSet();
const list = [];
_collectJS(actionDict, xref, list, parents);
if (list.length > 0) {
actions[action] = list;
}
}
}
}
if (dict.has("A")) {
const actionDict = dict.get("A");
const parents = new _primitives.RefSet();
const list = [];
_collectJS(actionDict, xref, list, parents);
if (list.length > 0) {
actions.Action = list;
}
}
return (0, _util.objectSize)(actions) > 0 ? actions : null;
}
const XMLEntities = {
0x3c: "<",
0x3e: ">",
0x26: "&",
0x22: """,
0x27: "'"
};
function encodeToXmlString(str) {
const buffer = [];
let start = 0;
for (let i = 0, ii = str.length; i < ii; i++) {
const char = str.codePointAt(i);
if (0x20 <= char && char <= 0x7e) {
const entity = XMLEntities[char];
if (entity) {
if (start < i) {
buffer.push(str.substring(start, i));
}
buffer.push(entity);
start = i + 1;
}
} else {
if (start < i) {
buffer.push(str.substring(start, i));
}
buffer.push(`&#x${char.toString(16).toUpperCase()};`);
if (char > 0xd7ff && (char < 0xe000 || char > 0xfffd)) {
i++;
}
start = i + 1;
}
}
if (buffer.length === 0) {
return str;
}
if (start < str.length) {
buffer.push(str.substring(start, str.length));
}
return buffer.join("");
}
function validateCSSFont(cssFontInfo) {
const DEFAULT_CSS_FONT_OBLIQUE = "14";
const DEFAULT_CSS_FONT_WEIGHT = "400";
const CSS_FONT_WEIGHT_VALUES = new Set(["100", "200", "300", "400", "500", "600", "700", "800", "900", "1000", "normal", "bold", "bolder", "lighter"]);
const {
fontFamily,
fontWeight,
italicAngle
} = cssFontInfo;
if (/^".*"$/.test(fontFamily)) {
if (/[^\\]"/.test(fontFamily.slice(1, fontFamily.length - 1))) {
(0, _util.warn)(`XFA - FontFamily contains some unescaped ": ${fontFamily}.`);
return false;
}
} else if (/^'.*'$/.test(fontFamily)) {
if (/[^\\]'/.test(fontFamily.slice(1, fontFamily.length - 1))) {
(0, _util.warn)(`XFA - FontFamily contains some unescaped ': ${fontFamily}.`);
return false;
}
} else {
for (const ident of fontFamily.split(/[ \t]+/)) {
if (/^(\d|(-(\d|-)))/.test(ident) || !/^[\w-\\]+$/.test(ident)) {
(0, _util.warn)(`XFA - FontFamily contains some invalid <custom-ident>: ${fontFamily}.`);
return false;
}
}
}
const weight = fontWeight ? fontWeight.toString() : "";
cssFontInfo.fontWeight = CSS_FONT_WEIGHT_VALUES.has(weight) ? weight : DEFAULT_CSS_FONT_WEIGHT;
const angle = parseFloat(italicAngle);
cssFontInfo.italicAngle = isNaN(angle) || angle < -90 || angle > 90 ? DEFAULT_CSS_FONT_OBLIQUE : italicAngle.toString();
return true;
}
function recoverJsURL(str) {
const URL_OPEN_METHODS = ["app.launchURL", "window.open", "xfa.host.gotoURL"];
const regex = new RegExp("^\\s*(" + URL_OPEN_METHODS.join("|").split(".").join("\\.") + ")\\((?:'|\")([^'\"]*)(?:'|\")(?:,\\s*(\\w+)\\)|\\))", "i");
const jsUrl = regex.exec(str);
if (jsUrl && jsUrl[2]) {
const url = jsUrl[2];
let newWindow = false;
if (jsUrl[3] === "true" && jsUrl[1] === "app.launchURL") {
newWindow = true;
}
return {
url,
newWindow
};
}
return null;
}
function numberToString(value) {
if (Number.isInteger(value)) {
return value.toString();
}
const roundedValue = Math.round(value * 100);
if (roundedValue % 100 === 0) {
return (roundedValue / 100).toString();
}
if (roundedValue % 10 === 0) {
return value.toFixed(1);
}
return value.toFixed(2);
}
function getNewAnnotationsMap(annotationStorage) {
if (!annotationStorage) {
return null;
}
const newAnnotationsByPage = new Map();
for (const [key, value] of annotationStorage) {
if (!key.startsWith(_util.AnnotationEditorPrefix)) {
continue;
}
let annotations = newAnnotationsByPage.get(value.pageIndex);
if (!annotations) {
annotations = [];
newAnnotationsByPage.set(value.pageIndex, annotations);
}
annotations.push(value);
}
return newAnnotationsByPage.size > 0 ? newAnnotationsByPage : null;
}
function isAscii(str) {
return /^[\x00-\x7F]*$/.test(str);
}
function stringToUTF16HexString(str) {
const buf = [];
for (let i = 0, ii = str.length; i < ii; i++) {
const char = str.charCodeAt(i);
buf.push((char >> 8 & 0xff).toString(16).padStart(2, "0"), (char & 0xff).toString(16).padStart(2, "0"));
}
return buf.join("");
}
function stringToUTF16String(str, bigEndian = false) {
const buf = [];
if (bigEndian) {
buf.push("\xFE\xFF");
}
for (let i = 0, ii = str.length; i < ii; i++) {
const char = str.charCodeAt(i);
buf.push(String.fromCharCode(char >> 8 & 0xff), String.fromCharCode(char & 0xff));
}
return buf.join("");
}
function getRotationMatrix(rotation, width, height) {
switch (rotation) {
case 90:
return [0, 1, -1, 0, width, 0];
case 180:
return [-1, 0, 0, -1, width, height];
case 270:
return [0, -1, 1, 0, 0, height];
default:
throw new Error("Invalid rotation");
}
}