ac8757f36f
Ensure that negative “LW” entries in an ExtGState dictionary are converted to their absolute values when the “gs” operator is processed. See PR https://github.com/mozilla/pdf.js/pull/19639
453 lines
14 KiB
JavaScript
453 lines
14 KiB
JavaScript
/* Copyright 2017 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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import { createIdFactory, XRefMock } from "./test_utils.js";
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import { Dict, Name } from "../../src/core/primitives.js";
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import { FormatError, OPS } from "../../src/shared/util.js";
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import { Stream, StringStream } from "../../src/core/stream.js";
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import { OperatorList } from "../../src/core/operator_list.js";
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import { PartialEvaluator } from "../../src/core/evaluator.js";
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import { WorkerTask } from "../../src/core/worker.js";
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describe("evaluator", function () {
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function HandlerMock() {
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this.inputs = [];
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}
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HandlerMock.prototype = {
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send(name, data) {
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this.inputs.push({ name, data });
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},
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};
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function ResourcesMock() {}
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ResourcesMock.prototype = {
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get(name) {
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return this[name];
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},
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};
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async function runOperatorListCheck(evaluator, stream, resources) {
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const operatorList = new OperatorList();
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const task = new WorkerTask("OperatorListCheck");
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await evaluator.getOperatorList({
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stream,
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task,
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resources,
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operatorList,
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});
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return operatorList;
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}
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let partialEvaluator;
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beforeAll(function () {
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partialEvaluator = new PartialEvaluator({
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xref: new XRefMock(),
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handler: new HandlerMock(),
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pageIndex: 0,
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idFactory: createIdFactory(/* pageIndex = */ 0),
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});
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});
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afterAll(function () {
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partialEvaluator = null;
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});
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describe("splitCombinedOperations", function () {
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it("should reject unknown operations", async function () {
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const stream = new StringStream("fTT");
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const result = await runOperatorListCheck(
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partialEvaluator,
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stream,
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new ResourcesMock()
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);
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expect(!!result.fnArray && !!result.argsArray).toEqual(true);
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expect(result.fnArray.length).toEqual(1);
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expect(result.fnArray[0]).toEqual(OPS.constructPath);
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expect(result.argsArray[0]).toEqual([OPS.fill, [null], null]);
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});
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it("should handle one operation", async function () {
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const stream = new StringStream("Q");
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const result = await runOperatorListCheck(
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partialEvaluator,
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stream,
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new ResourcesMock()
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);
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expect(!!result.fnArray && !!result.argsArray).toEqual(true);
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expect(result.fnArray.length).toEqual(1);
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expect(result.fnArray[0]).toEqual(OPS.restore);
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});
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it("should handle two glued operations", async function () {
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const imgDict = new Dict();
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imgDict.set("Subtype", Name.get("Image"));
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imgDict.set("Width", 1);
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imgDict.set("Height", 1);
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const imgStream = new Stream([0]);
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imgStream.dict = imgDict;
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const xObject = new Dict();
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xObject.set("Res1", imgStream);
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const resources = new ResourcesMock();
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resources.XObject = xObject;
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const stream = new StringStream("/Res1 DoQ");
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const result = await runOperatorListCheck(
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partialEvaluator,
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stream,
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resources
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);
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expect(result.fnArray.length).toEqual(3);
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expect(result.fnArray[0]).toEqual(OPS.dependency);
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expect(result.fnArray[1]).toEqual(OPS.paintImageXObject);
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expect(result.fnArray[2]).toEqual(OPS.restore);
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expect(result.argsArray.length).toEqual(3);
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expect(result.argsArray[0]).toEqual(["img_p0_1"]);
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expect(result.argsArray[1]).toEqual(["img_p0_1", 1, 1]);
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expect(result.argsArray[2]).toEqual(null);
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});
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it("should handle three glued operations", async function () {
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const stream = new StringStream("fff");
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const result = await runOperatorListCheck(
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partialEvaluator,
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stream,
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new ResourcesMock()
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);
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expect(!!result.fnArray && !!result.argsArray).toEqual(true);
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expect(result.fnArray.length).toEqual(3);
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expect(result.fnArray).toEqual([
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OPS.constructPath,
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OPS.constructPath,
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OPS.constructPath,
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]);
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expect(result.argsArray[0][0]).toEqual(OPS.fill);
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expect(result.argsArray[1][0]).toEqual(OPS.fill);
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expect(result.argsArray[2][0]).toEqual(OPS.fill);
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});
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it("should handle three glued operations #2", async function () {
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const resources = new ResourcesMock();
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resources.Res1 = {};
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const stream = new StringStream("B*Bf*");
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const result = await runOperatorListCheck(
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partialEvaluator,
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stream,
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resources
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);
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expect(!!result.fnArray && !!result.argsArray).toEqual(true);
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expect(result.fnArray).toEqual([
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OPS.constructPath,
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OPS.constructPath,
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OPS.constructPath,
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]);
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expect(result.argsArray[0][0]).toEqual(OPS.eoFillStroke);
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expect(result.argsArray[1][0]).toEqual(OPS.fillStroke);
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expect(result.argsArray[2][0]).toEqual(OPS.eoFill);
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});
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it("should handle glued operations and operands", async function () {
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const stream = new StringStream("f5 Ts");
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const result = await runOperatorListCheck(
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partialEvaluator,
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stream,
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new ResourcesMock()
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);
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expect(!!result.fnArray && !!result.argsArray).toEqual(true);
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expect(result.fnArray.length).toEqual(2);
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expect(result.fnArray[0]).toEqual(OPS.constructPath);
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expect(result.fnArray[1]).toEqual(OPS.setTextRise);
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expect(result.argsArray.length).toEqual(2);
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expect(result.argsArray[1].length).toEqual(1);
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expect(result.argsArray[1][0]).toEqual(5);
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});
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it("should handle glued operations and literals", async function () {
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const stream = new StringStream("trueifalserinulln");
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const result = await runOperatorListCheck(
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partialEvaluator,
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stream,
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new ResourcesMock()
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);
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expect(!!result.fnArray && !!result.argsArray).toEqual(true);
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expect(result.fnArray.length).toEqual(3);
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expect(result.fnArray[0]).toEqual(OPS.setFlatness);
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expect(result.fnArray[1]).toEqual(OPS.setRenderingIntent);
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expect(result.fnArray[2]).toEqual(OPS.constructPath);
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expect(result.argsArray.length).toEqual(3);
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expect(result.argsArray[0].length).toEqual(1);
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expect(result.argsArray[0][0]).toEqual(true);
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expect(result.argsArray[1].length).toEqual(1);
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expect(result.argsArray[1][0]).toEqual(false);
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expect(result.argsArray[2]).toEqual([OPS.endPath, [null], null]);
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});
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});
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describe("validateNumberOfArgs", function () {
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it("should execute if correct number of arguments", async function () {
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const stream = new StringStream("5 1 d0");
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const result = await runOperatorListCheck(
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partialEvaluator,
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stream,
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new ResourcesMock()
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);
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expect(result.argsArray[0][0]).toEqual(5);
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expect(result.argsArray[0][1]).toEqual(1);
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expect(result.fnArray[0]).toEqual(OPS.setCharWidth);
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});
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it("should execute if too many arguments", async function () {
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const stream = new StringStream("5 1 4 d0");
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const result = await runOperatorListCheck(
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partialEvaluator,
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stream,
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new ResourcesMock()
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);
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expect(result.argsArray[0][0]).toEqual(1);
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expect(result.argsArray[0][1]).toEqual(4);
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expect(result.fnArray[0]).toEqual(OPS.setCharWidth);
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});
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it("should execute if nested commands", async function () {
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const gState = new Dict();
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gState.set("LW", 2);
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gState.set("CA", 0.5);
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const extGState = new Dict();
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extGState.set("GS2", gState);
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const resources = new ResourcesMock();
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resources.ExtGState = extGState;
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const stream = new StringStream("/F2 /GS2 gs 5.711 Tf");
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const result = await runOperatorListCheck(
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partialEvaluator,
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stream,
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resources
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);
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expect(result.fnArray.length).toEqual(3);
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expect(result.fnArray[0]).toEqual(OPS.setGState);
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expect(result.fnArray[1]).toEqual(OPS.dependency);
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expect(result.fnArray[2]).toEqual(OPS.setFont);
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expect(result.argsArray.length).toEqual(3);
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expect(result.argsArray[0]).toEqual([
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[
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["LW", 2],
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["CA", 0.5],
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],
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]);
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expect(result.argsArray[1]).toEqual(["g_font_error"]);
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expect(result.argsArray[2]).toEqual(["g_font_error", 5.711]);
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});
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it("should skip if too few arguments", async function () {
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const stream = new StringStream("5 d0");
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const result = await runOperatorListCheck(
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partialEvaluator,
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stream,
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new ResourcesMock()
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);
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expect(result.argsArray).toEqual([]);
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expect(result.fnArray).toEqual([]);
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});
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it(
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"should error if (many) path operators have too few arguments " +
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"(bug 1443140)",
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async function () {
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const NUM_INVALID_OPS = 25;
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// Non-path operators, should be ignored.
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const invalidMoveText = "10 Td\n".repeat(NUM_INVALID_OPS);
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const moveTextStream = new StringStream(invalidMoveText);
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const result = await runOperatorListCheck(
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partialEvaluator,
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moveTextStream,
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new ResourcesMock()
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);
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expect(result.argsArray).toEqual([]);
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expect(result.fnArray).toEqual([]);
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// Path operators, should throw error.
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const invalidLineTo = "20 l\n".repeat(NUM_INVALID_OPS);
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const lineToStream = new StringStream(invalidLineTo);
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try {
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await runOperatorListCheck(
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partialEvaluator,
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lineToStream,
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new ResourcesMock()
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);
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// Shouldn't get here.
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expect(false).toEqual(true);
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} catch (reason) {
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expect(reason instanceof FormatError).toEqual(true);
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expect(reason.message).toEqual(
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"Invalid command l: expected 2 args, but received 1 args."
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);
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}
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}
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);
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it("should close opened saves", async function () {
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const stream = new StringStream("qq");
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const result = await runOperatorListCheck(
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partialEvaluator,
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stream,
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new ResourcesMock()
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);
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expect(!!result.fnArray && !!result.argsArray).toEqual(true);
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expect(result.fnArray.length).toEqual(4);
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expect(result.fnArray[0]).toEqual(OPS.save);
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expect(result.fnArray[1]).toEqual(OPS.save);
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expect(result.fnArray[2]).toEqual(OPS.restore);
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expect(result.fnArray[3]).toEqual(OPS.restore);
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});
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it("should error on paintXObject if name is missing", async function () {
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const stream = new StringStream("/ Do");
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try {
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await runOperatorListCheck(
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partialEvaluator,
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stream,
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new ResourcesMock()
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);
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// Shouldn't get here.
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expect(false).toEqual(true);
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} catch (reason) {
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expect(reason instanceof FormatError).toEqual(true);
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expect(reason.message).toEqual("XObject should be a stream");
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}
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});
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it("should skip paintXObject if subtype is PS", async function () {
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const xobjStreamDict = new Dict();
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xobjStreamDict.set("Subtype", Name.get("PS"));
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const xobjStream = new Stream([], 0, 0, xobjStreamDict);
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const xobjs = new Dict();
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xobjs.set("Res1", xobjStream);
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const resources = new Dict();
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resources.set("XObject", xobjs);
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const stream = new StringStream("/Res1 Do");
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const result = await runOperatorListCheck(
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partialEvaluator,
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stream,
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resources
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);
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expect(result.argsArray).toEqual([]);
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expect(result.fnArray).toEqual([]);
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});
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});
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describe("thread control", function () {
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it("should abort operator list parsing", async function () {
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const stream = new StringStream("qqQQ");
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const resources = new ResourcesMock();
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const result = new OperatorList();
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const task = new WorkerTask("OperatorListAbort");
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task.terminate();
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try {
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await partialEvaluator.getOperatorList({
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stream,
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task,
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resources,
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operatorList: result,
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});
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// Shouldn't get here.
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expect(false).toEqual(true);
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} catch {
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expect(!!result.fnArray && !!result.argsArray).toEqual(true);
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expect(result.fnArray.length).toEqual(0);
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}
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});
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it("should abort text content parsing", async function () {
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const resources = new ResourcesMock();
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const stream = new StringStream("qqQQ");
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const task = new WorkerTask("TextContentAbort");
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task.terminate();
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try {
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await partialEvaluator.getTextContent({
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stream,
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task,
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resources,
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});
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// Shouldn't get here.
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expect(false).toEqual(true);
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} catch {
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expect(true).toEqual(true);
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}
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});
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});
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describe("operator list", function () {
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class StreamSinkMock {
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enqueue() {}
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}
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it("should get correct total length after flushing", function () {
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const operatorList = new OperatorList(null, new StreamSinkMock());
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operatorList.addOp(OPS.save, null);
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operatorList.addOp(OPS.restore, null);
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expect(operatorList.totalLength).toEqual(2);
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expect(operatorList.length).toEqual(2);
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operatorList.flush();
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expect(operatorList.totalLength).toEqual(2);
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expect(operatorList.length).toEqual(0);
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});
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});
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describe("graphics-state operators", function () {
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it("should convert negative line width to absolute value in the graphic state", async function () {
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const gState = new Dict();
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gState.set("LW", -5);
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const extGState = new Dict();
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extGState.set("GSneg", gState);
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const resources = new ResourcesMock();
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resources.ExtGState = extGState;
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const stream = new StringStream("/GSneg gs");
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const result = await runOperatorListCheck(
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partialEvaluator,
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stream,
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resources
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);
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expect(result.fnArray).toEqual([OPS.setGState]);
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const stateEntries = result.argsArray[0][0];
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const lwEntry = stateEntries.find(([key]) => key === "LW");
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expect(lwEntry).toBeDefined();
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expect(lwEntry[1]).toEqual(5);
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});
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});
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});
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