260 lines
12 KiB
JavaScript
260 lines
12 KiB
JavaScript
/**
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* @licstart The following is the entire license notice for the
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* JavaScript code in this page
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*
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* Copyright 2022 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @licend The above is the entire license notice for the
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* JavaScript code in this page
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*/
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"use strict";
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var _primitives = require("../../core/primitives.js");
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var _parser = require("../../core/parser.js");
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var _util = require("../../shared/util.js");
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var _stream = require("../../core/stream.js");
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describe("parser", function () {
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describe("Parser", function () {
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describe("inlineStreamSkipEI", function () {
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it("should skip over the EI marker if it is found", function () {
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const string = "q 1 0 0 1 0 0 cm BI /W 10 /H 10 /BPC 1 " + "/F /A85 ID abc123~> EI Q";
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const input = new _stream.StringStream(string);
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const parser = new _parser.Parser({
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lexer: new _parser.Lexer(input),
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xref: null,
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allowStreams: true
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});
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parser.inlineStreamSkipEI(input);
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expect(input.pos).toEqual(string.indexOf("Q"));
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expect(input.peekByte()).toEqual(0x51);
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});
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it("should skip to the end of stream if the EI marker is not found", function () {
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const string = "q 1 0 0 1 0 0 cm BI /W 10 /H 10 /BPC 1 /F /A85 ID abc123~> Q";
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const input = new _stream.StringStream(string);
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const parser = new _parser.Parser({
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lexer: new _parser.Lexer(input),
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xref: null,
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allowStreams: true
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});
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parser.inlineStreamSkipEI(input);
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expect(input.pos).toEqual(string.length);
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expect(input.peekByte()).toEqual(-1);
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});
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});
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});
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describe("Lexer", function () {
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describe("nextChar", function () {
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it("should return and set -1 when the end of the stream is reached", function () {
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const input = new _stream.StringStream("");
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const lexer = new _parser.Lexer(input);
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expect(lexer.nextChar()).toEqual(-1);
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expect(lexer.currentChar).toEqual(-1);
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});
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it("should return and set the character after the current position", function () {
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const input = new _stream.StringStream("123");
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const lexer = new _parser.Lexer(input);
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expect(lexer.nextChar()).toEqual(0x32);
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expect(lexer.currentChar).toEqual(0x32);
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});
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});
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describe("peekChar", function () {
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it("should only return -1 when the end of the stream is reached", function () {
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const input = new _stream.StringStream("");
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const lexer = new _parser.Lexer(input);
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expect(lexer.peekChar()).toEqual(-1);
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expect(lexer.currentChar).toEqual(-1);
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});
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it("should only return the character after the current position", function () {
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const input = new _stream.StringStream("123");
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const lexer = new _parser.Lexer(input);
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expect(lexer.peekChar()).toEqual(0x32);
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expect(lexer.currentChar).toEqual(0x31);
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});
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});
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describe("getNumber", function () {
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it("should stop parsing numbers at the end of stream", function () {
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const input = new _stream.StringStream("11.234");
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const lexer = new _parser.Lexer(input);
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expect(lexer.getNumber()).toEqual(11.234);
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});
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it("should parse PostScript numbers", function () {
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const numbers = ["-.002", "34.5", "-3.62", "123.6e10", "1E-5", "-1.", "0.0", "123", "-98", "43445", "0", "+17"];
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for (const number of numbers) {
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const input = new _stream.StringStream(number);
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const lexer = new _parser.Lexer(input);
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const result = lexer.getNumber(),
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expected = parseFloat(number);
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if (result !== expected && Math.abs(result - expected) < 1e-15) {
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console.error(`Fuzzy matching "${result}" with "${expected}" to ` + "work-around rounding bugs in Chromium browsers.");
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expect(true).toEqual(true);
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continue;
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}
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expect(result).toEqual(expected);
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}
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});
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it("should ignore double negative before number", function () {
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const input = new _stream.StringStream("--205.88");
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const lexer = new _parser.Lexer(input);
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expect(lexer.getNumber()).toEqual(-205.88);
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});
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it("should ignore minus signs in the middle of number", function () {
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const input = new _stream.StringStream("205--.88");
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const lexer = new _parser.Lexer(input);
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expect(lexer.getNumber()).toEqual(205.88);
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});
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it("should ignore line-breaks between operator and digit in number", function () {
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const minusInput = new _stream.StringStream("-\r\n205.88");
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const minusLexer = new _parser.Lexer(minusInput);
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expect(minusLexer.getNumber()).toEqual(-205.88);
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const plusInput = new _stream.StringStream("+\r\n205.88");
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const plusLexer = new _parser.Lexer(plusInput);
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expect(plusLexer.getNumber()).toEqual(205.88);
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});
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it("should treat a single decimal point, or minus sign, as zero", function () {
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const dotInput = new _stream.StringStream(".");
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const dotLexer = new _parser.Lexer(dotInput);
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expect(dotLexer.getNumber()).toEqual(0);
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const minusInput = new _stream.StringStream("-");
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const minusLexer = new _parser.Lexer(minusInput);
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expect(minusLexer.getNumber()).toEqual(0);
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const numbers = ["..", "-.", "+.", "-\r\n.", "+\r\n."];
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for (const number of numbers) {
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const invalidInput = new _stream.StringStream(number);
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const invalidLexer = new _parser.Lexer(invalidInput);
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expect(function () {
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return invalidLexer.getNumber();
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}).toThrowError(_util.FormatError, /^Invalid number:\s/);
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}
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});
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it("should handle glued numbers and operators", function () {
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const input = new _stream.StringStream("123ET");
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const lexer = new _parser.Lexer(input);
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expect(lexer.getNumber()).toEqual(123);
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expect(lexer.currentChar).toEqual(0x45);
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});
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});
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describe("getString", function () {
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it("should stop parsing strings at the end of stream", function () {
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const input = new _stream.StringStream("(1$4)");
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input.getByte = function (super_getByte) {
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const ch = super_getByte.call(input);
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return ch === 0x24 ? -1 : ch;
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}.bind(input, input.getByte);
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const lexer = new _parser.Lexer(input);
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expect(lexer.getString()).toEqual("1");
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});
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it("should ignore escaped CR and LF", function () {
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const input = new _stream.StringStream("(\\101\\\r\n\\102\\\r\\103\\\n\\104)");
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const lexer = new _parser.Lexer(input);
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expect(lexer.getString()).toEqual("ABCD");
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});
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});
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describe("getHexString", function () {
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it("should not throw exception on bad input", function () {
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const input = new _stream.StringStream("<7 0 2 15 5 2 2 2 4 3 2 4>");
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const lexer = new _parser.Lexer(input);
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expect(lexer.getHexString()).toEqual('p!U"$2');
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});
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});
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describe("getName", function () {
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it("should handle Names with invalid usage of NUMBER SIGN (#)", function () {
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const inputNames = ["/# 680 0 R", "/#AQwerty", "/#A<</B"];
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const expectedNames = ["#", "#AQwerty", "#A"];
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for (let i = 0, ii = inputNames.length; i < ii; i++) {
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const input = new _stream.StringStream(inputNames[i]);
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const lexer = new _parser.Lexer(input);
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expect(lexer.getName()).toEqual(_primitives.Name.get(expectedNames[i]));
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}
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});
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});
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describe("getObj", function () {
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it("should stop immediately when the start of a command is " + "a non-visible ASCII character (issue 13999)", function () {
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const input = new _stream.StringStream("\x14q\nQ");
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const lexer = new _parser.Lexer(input);
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let obj = lexer.getObj();
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expect(obj instanceof _primitives.Cmd).toEqual(true);
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expect(obj.cmd).toEqual("\x14");
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obj = lexer.getObj();
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expect(obj instanceof _primitives.Cmd).toEqual(true);
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expect(obj.cmd).toEqual("q");
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obj = lexer.getObj();
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expect(obj instanceof _primitives.Cmd).toEqual(true);
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expect(obj.cmd).toEqual("Q");
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obj = lexer.getObj();
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expect(obj).toEqual(_primitives.EOF);
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});
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});
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});
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describe("Linearization", function () {
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it("should not find a linearization dictionary", function () {
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const stream1 = new _stream.StringStream("3 0 obj\n" + "<<\n" + "/Length 4622\n" + "/Filter /FlateDecode\n" + ">>\n" + "endobj");
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expect(_parser.Linearization.create(stream1)).toEqual(null);
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const stream2 = new _stream.StringStream("1 0 obj\n" + "<<\n" + "/Linearized 0\n" + ">>\n" + "endobj");
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expect(_parser.Linearization.create(stream2)).toEqual(null);
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});
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it("should accept a valid linearization dictionary", function () {
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const stream = new _stream.StringStream("131 0 obj\n" + "<<\n" + "/Linearized 1\n" + "/O 133\n" + "/H [ 1388 863 ]\n" + "/L 90\n" + "/E 43573\n" + "/N 18\n" + "/T 193883\n" + ">>\n" + "endobj");
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const expectedLinearizationDict = {
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length: 90,
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hints: [1388, 863],
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objectNumberFirst: 133,
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endFirst: 43573,
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numPages: 18,
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mainXRefEntriesOffset: 193883,
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pageFirst: 0
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};
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expect(_parser.Linearization.create(stream)).toEqual(expectedLinearizationDict);
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});
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it("should reject a linearization dictionary with invalid " + "integer parameters", function () {
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const stream1 = new _stream.StringStream("1 0 obj\n" + "<<\n" + "/Linearized 1\n" + "/O 133\n" + "/H [ 1388 863 ]\n" + "/L 196622\n" + "/E 43573\n" + "/N 18\n" + "/T 193883\n" + ">>\n" + "endobj");
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expect(function () {
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return _parser.Linearization.create(stream1);
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}).toThrow(new Error('The "L" parameter in the linearization ' + "dictionary does not equal the stream length."));
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const stream2 = new _stream.StringStream("1 0 obj\n" + "<<\n" + "/Linearized 1\n" + "/O 133\n" + "/H [ 1388 863 ]\n" + "/L 84\n" + "/E 0\n" + "/N 18\n" + "/T 193883\n" + ">>\n" + "endobj");
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expect(function () {
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return _parser.Linearization.create(stream2);
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}).toThrow(new Error('The "E" parameter in the linearization dictionary is invalid.'));
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const stream3 = new _stream.StringStream("1 0 obj\n" + "<<\n" + "/Linearized 1\n" + "/O /abc\n" + "/H [ 1388 863 ]\n" + "/L 89\n" + "/E 43573\n" + "/N 18\n" + "/T 193883\n" + ">>\n" + "endobj");
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expect(function () {
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return _parser.Linearization.create(stream3);
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}).toThrow(new Error('The "O" parameter in the linearization dictionary is invalid.'));
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});
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it("should reject a linearization dictionary with invalid hint parameters", function () {
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const stream1 = new _stream.StringStream("1 0 obj\n" + "<<\n" + "/Linearized 1\n" + "/O 133\n" + "/H 1388\n" + "/L 80\n" + "/E 43573\n" + "/N 18\n" + "/T 193883\n" + ">>\n" + "endobj");
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expect(function () {
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return _parser.Linearization.create(stream1);
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}).toThrow(new Error("Hint array in the linearization dictionary is invalid."));
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const stream2 = new _stream.StringStream("1 0 obj\n" + "<<\n" + "/Linearized 1\n" + "/O 133\n" + "/H [ 1388 ]\n" + "/L 84\n" + "/E 43573\n" + "/N 18\n" + "/T 193883\n" + ">>\n" + "endobj");
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expect(function () {
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return _parser.Linearization.create(stream2);
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}).toThrow(new Error("Hint array in the linearization dictionary is invalid."));
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const stream3 = new _stream.StringStream("1 0 obj\n" + "<<\n" + "/Linearized 1\n" + "/O 133\n" + "/H [ 1388 863 0 234]\n" + "/L 93\n" + "/E 43573\n" + "/N 18\n" + "/T 193883\n" + ">>\n" + "endobj");
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expect(function () {
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return _parser.Linearization.create(stream3);
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}).toThrow(new Error("Hint (2) in the linearization dictionary is invalid."));
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});
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});
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}); |