392 lines
8.1 KiB
JavaScript
392 lines
8.1 KiB
JavaScript
/**
|
|
* @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
|
|
*/
|
|
"use strict";
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports.clearPrimitiveCaches = clearPrimitiveCaches;
|
|
exports.isEOF = isEOF;
|
|
exports.isCmd = isCmd;
|
|
exports.isDict = isDict;
|
|
exports.isName = isName;
|
|
exports.isRef = isRef;
|
|
exports.isRefsEqual = isRefsEqual;
|
|
exports.isStream = isStream;
|
|
exports.RefSetCache = exports.RefSet = exports.Ref = exports.Name = exports.Dict = exports.Cmd = exports.EOF = void 0;
|
|
|
|
var _util = require("../shared/util.js");
|
|
|
|
var EOF = {};
|
|
exports.EOF = EOF;
|
|
|
|
var Name = function NameClosure() {
|
|
let nameCache = Object.create(null);
|
|
|
|
function Name(name) {
|
|
this.name = name;
|
|
}
|
|
|
|
Name.prototype = {};
|
|
|
|
Name.get = function Name_get(name) {
|
|
var nameValue = nameCache[name];
|
|
return nameValue ? nameValue : nameCache[name] = new Name(name);
|
|
};
|
|
|
|
Name._clearCache = function () {
|
|
nameCache = Object.create(null);
|
|
};
|
|
|
|
return Name;
|
|
}();
|
|
|
|
exports.Name = Name;
|
|
|
|
var Cmd = function CmdClosure() {
|
|
let cmdCache = Object.create(null);
|
|
|
|
function Cmd(cmd) {
|
|
this.cmd = cmd;
|
|
}
|
|
|
|
Cmd.prototype = {};
|
|
|
|
Cmd.get = function Cmd_get(cmd) {
|
|
var cmdValue = cmdCache[cmd];
|
|
return cmdValue ? cmdValue : cmdCache[cmd] = new Cmd(cmd);
|
|
};
|
|
|
|
Cmd._clearCache = function () {
|
|
cmdCache = Object.create(null);
|
|
};
|
|
|
|
return Cmd;
|
|
}();
|
|
|
|
exports.Cmd = Cmd;
|
|
|
|
var Dict = function DictClosure() {
|
|
var nonSerializable = function nonSerializableClosure() {
|
|
return nonSerializable;
|
|
};
|
|
|
|
function Dict(xref) {
|
|
this._map = Object.create(null);
|
|
this.xref = xref;
|
|
this.objId = null;
|
|
this.suppressEncryption = false;
|
|
this.__nonSerializable__ = nonSerializable;
|
|
}
|
|
|
|
Dict.prototype = {
|
|
assignXref: function Dict_assignXref(newXref) {
|
|
this.xref = newXref;
|
|
},
|
|
|
|
get size() {
|
|
return Object.keys(this._map).length;
|
|
},
|
|
|
|
get(key1, key2, key3) {
|
|
let value = this._map[key1];
|
|
|
|
if (value === undefined && key2 !== undefined) {
|
|
value = this._map[key2];
|
|
|
|
if (value === undefined && key3 !== undefined) {
|
|
value = this._map[key3];
|
|
}
|
|
}
|
|
|
|
if (value instanceof Ref && this.xref) {
|
|
return this.xref.fetch(value, this.suppressEncryption);
|
|
}
|
|
|
|
return value;
|
|
},
|
|
|
|
async getAsync(key1, key2, key3) {
|
|
let value = this._map[key1];
|
|
|
|
if (value === undefined && key2 !== undefined) {
|
|
value = this._map[key2];
|
|
|
|
if (value === undefined && key3 !== undefined) {
|
|
value = this._map[key3];
|
|
}
|
|
}
|
|
|
|
if (value instanceof Ref && this.xref) {
|
|
return this.xref.fetchAsync(value, this.suppressEncryption);
|
|
}
|
|
|
|
return value;
|
|
},
|
|
|
|
getArray(key1, key2, key3) {
|
|
let value = this.get(key1, key2, key3);
|
|
|
|
if (!Array.isArray(value) || !this.xref) {
|
|
return value;
|
|
}
|
|
|
|
value = value.slice();
|
|
|
|
for (let i = 0, ii = value.length; i < ii; i++) {
|
|
if (!(value[i] instanceof Ref)) {
|
|
continue;
|
|
}
|
|
|
|
value[i] = this.xref.fetch(value[i], this.suppressEncryption);
|
|
}
|
|
|
|
return value;
|
|
},
|
|
|
|
getRaw: function Dict_getRaw(key) {
|
|
return this._map[key];
|
|
},
|
|
getKeys: function Dict_getKeys() {
|
|
return Object.keys(this._map);
|
|
},
|
|
getRawValues: function Dict_getRawValues() {
|
|
return Object.values(this._map);
|
|
},
|
|
set: function Dict_set(key, value) {
|
|
this._map[key] = value;
|
|
},
|
|
has: function Dict_has(key) {
|
|
return this._map[key] !== undefined;
|
|
},
|
|
forEach: function Dict_forEach(callback) {
|
|
for (var key in this._map) {
|
|
callback(key, this.get(key));
|
|
}
|
|
}
|
|
};
|
|
Dict.empty = new Dict(null);
|
|
|
|
Dict.merge = function ({
|
|
xref,
|
|
dictArray,
|
|
mergeSubDicts = false
|
|
}) {
|
|
const mergedDict = new Dict(xref);
|
|
|
|
if (!mergeSubDicts) {
|
|
for (const dict of dictArray) {
|
|
if (!(dict instanceof Dict)) {
|
|
continue;
|
|
}
|
|
|
|
for (const [key, value] of Object.entries(dict._map)) {
|
|
if (mergedDict._map[key] === undefined) {
|
|
mergedDict._map[key] = value;
|
|
}
|
|
}
|
|
}
|
|
|
|
return mergedDict.size > 0 ? mergedDict : Dict.empty;
|
|
}
|
|
|
|
const properties = new Map();
|
|
|
|
for (const dict of dictArray) {
|
|
if (!(dict instanceof Dict)) {
|
|
continue;
|
|
}
|
|
|
|
for (const [key, value] of Object.entries(dict._map)) {
|
|
let property = properties.get(key);
|
|
|
|
if (property === undefined) {
|
|
property = [];
|
|
properties.set(key, property);
|
|
}
|
|
|
|
property.push(value);
|
|
}
|
|
}
|
|
|
|
for (const [name, values] of properties) {
|
|
if (values.length === 1 || !(values[0] instanceof Dict)) {
|
|
mergedDict._map[name] = values[0];
|
|
continue;
|
|
}
|
|
|
|
const subDict = new Dict(xref);
|
|
|
|
for (const dict of values) {
|
|
if (!(dict instanceof Dict)) {
|
|
continue;
|
|
}
|
|
|
|
for (const [key, value] of Object.entries(dict._map)) {
|
|
if (subDict._map[key] === undefined) {
|
|
subDict._map[key] = value;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (subDict.size > 0) {
|
|
mergedDict._map[name] = subDict;
|
|
}
|
|
}
|
|
|
|
properties.clear();
|
|
return mergedDict.size > 0 ? mergedDict : Dict.empty;
|
|
};
|
|
|
|
return Dict;
|
|
}();
|
|
|
|
exports.Dict = Dict;
|
|
|
|
var Ref = function RefClosure() {
|
|
let refCache = Object.create(null);
|
|
|
|
function Ref(num, gen) {
|
|
this.num = num;
|
|
this.gen = gen;
|
|
}
|
|
|
|
Ref.prototype = {
|
|
toString: function Ref_toString() {
|
|
if (this.gen === 0) {
|
|
return `${this.num}R`;
|
|
}
|
|
|
|
return `${this.num}R${this.gen}`;
|
|
}
|
|
};
|
|
|
|
Ref.get = function (num, gen) {
|
|
const key = gen === 0 ? `${num}R` : `${num}R${gen}`;
|
|
const refValue = refCache[key];
|
|
return refValue ? refValue : refCache[key] = new Ref(num, gen);
|
|
};
|
|
|
|
Ref._clearCache = function () {
|
|
refCache = Object.create(null);
|
|
};
|
|
|
|
return Ref;
|
|
}();
|
|
|
|
exports.Ref = Ref;
|
|
|
|
class RefSet {
|
|
constructor() {
|
|
this._set = new Set();
|
|
}
|
|
|
|
has(ref) {
|
|
return this._set.has(ref.toString());
|
|
}
|
|
|
|
put(ref) {
|
|
this._set.add(ref.toString());
|
|
}
|
|
|
|
remove(ref) {
|
|
this._set.delete(ref.toString());
|
|
}
|
|
|
|
}
|
|
|
|
exports.RefSet = RefSet;
|
|
|
|
class RefSetCache {
|
|
constructor() {
|
|
this._map = new Map();
|
|
}
|
|
|
|
get size() {
|
|
return this._map.size;
|
|
}
|
|
|
|
get(ref) {
|
|
return this._map.get(ref.toString());
|
|
}
|
|
|
|
has(ref) {
|
|
return this._map.has(ref.toString());
|
|
}
|
|
|
|
put(ref, obj) {
|
|
this._map.set(ref.toString(), obj);
|
|
}
|
|
|
|
putAlias(ref, aliasRef) {
|
|
this._map.set(ref.toString(), this.get(aliasRef));
|
|
}
|
|
|
|
forEach(callback) {
|
|
for (const value of this._map.values()) {
|
|
callback(value);
|
|
}
|
|
}
|
|
|
|
clear() {
|
|
this._map.clear();
|
|
}
|
|
|
|
}
|
|
|
|
exports.RefSetCache = RefSetCache;
|
|
|
|
function isEOF(v) {
|
|
return v === EOF;
|
|
}
|
|
|
|
function isName(v, name) {
|
|
return v instanceof Name && (name === undefined || v.name === name);
|
|
}
|
|
|
|
function isCmd(v, cmd) {
|
|
return v instanceof Cmd && (cmd === undefined || v.cmd === cmd);
|
|
}
|
|
|
|
function isDict(v, type) {
|
|
return v instanceof Dict && (type === undefined || isName(v.get("Type"), type));
|
|
}
|
|
|
|
function isRef(v) {
|
|
return v instanceof Ref;
|
|
}
|
|
|
|
function isRefsEqual(v1, v2) {
|
|
return v1.num === v2.num && v1.gen === v2.gen;
|
|
}
|
|
|
|
function isStream(v) {
|
|
return typeof v === "object" && v !== null && v.getBytes !== undefined;
|
|
}
|
|
|
|
function clearPrimitiveCaches() {
|
|
Cmd._clearCache();
|
|
|
|
Name._clearCache();
|
|
|
|
Ref._clearCache();
|
|
} |