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Generic build of PDF.js library.
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pdfjs-dist/lib/test/unit/evaluator_spec.js

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/* Copyright 2017 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.
*/
'use strict';
var coreEvaluator = require('../../core/evaluator.js');
var corePrimitives = require('../../core/primitives.js');
var coreStream = require('../../core/stream.js');
var coreWorker = require('../../core/worker.js');
var sharedUtil = require('../../shared/util.js');
var OperatorList = coreEvaluator.OperatorList;
var PartialEvaluator = coreEvaluator.PartialEvaluator;
var Dict = corePrimitives.Dict;
var Name = corePrimitives.Name;
var Stream = coreStream.Stream;
var StringStream = coreStream.StringStream;
var WorkerTask = coreWorker.WorkerTask;
var OPS = sharedUtil.OPS;
describe('evaluator', function () {
function XrefMock(queue) {
this.queue = queue || [];
}
XrefMock.prototype = {
fetchIfRef: function fetchIfRef() {
return this.queue.shift();
}
};
function HandlerMock() {
this.inputs = [];
}
HandlerMock.prototype = {
send: function send(name, data) {
this.inputs.push({
name: name,
data: data
});
}
};
function ResourcesMock() {}
ResourcesMock.prototype = {
get: function get(name) {
return this[name];
}
};
function PdfManagerMock() {}
function runOperatorListCheck(evaluator, stream, resources, callback) {
var result = new OperatorList();
var task = new WorkerTask('OperatorListCheck');
evaluator.getOperatorList(stream, task, resources, result).then(function () {
callback(result);
});
}
describe('splitCombinedOperations', function () {
it('should reject unknown operations', function (done) {
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var stream = new StringStream('fTT');
runOperatorListCheck(evaluator, stream, new ResourcesMock(), function (result) {
expect(!!result.fnArray && !!result.argsArray).toEqual(true);
expect(result.fnArray.length).toEqual(1);
expect(result.fnArray[0]).toEqual(OPS.fill);
expect(result.argsArray[0]).toEqual(null);
done();
});
});
it('should handle one operations', function (done) {
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var stream = new StringStream('Q');
runOperatorListCheck(evaluator, stream, new ResourcesMock(), function (result) {
expect(!!result.fnArray && !!result.argsArray).toEqual(true);
expect(result.fnArray.length).toEqual(1);
expect(result.fnArray[0]).toEqual(OPS.restore);
done();
});
});
it('should handle two glued operations', function (done) {
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var resources = new ResourcesMock();
resources.Res1 = {};
var stream = new StringStream('/Res1 DoQ');
runOperatorListCheck(evaluator, stream, resources, function (result) {
expect(!!result.fnArray && !!result.argsArray).toEqual(true);
expect(result.fnArray.length).toEqual(2);
expect(result.fnArray[0]).toEqual(OPS.paintXObject);
expect(result.fnArray[1]).toEqual(OPS.restore);
done();
});
});
it('should handle tree glued operations', function (done) {
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var stream = new StringStream('fff');
runOperatorListCheck(evaluator, stream, new ResourcesMock(), function (result) {
expect(!!result.fnArray && !!result.argsArray).toEqual(true);
expect(result.fnArray.length).toEqual(3);
expect(result.fnArray[0]).toEqual(OPS.fill);
expect(result.fnArray[1]).toEqual(OPS.fill);
expect(result.fnArray[2]).toEqual(OPS.fill);
done();
});
});
it('should handle three glued operations #2', function (done) {
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var resources = new ResourcesMock();
resources.Res1 = {};
var stream = new StringStream('B*Bf*');
runOperatorListCheck(evaluator, stream, resources, function (result) {
expect(!!result.fnArray && !!result.argsArray).toEqual(true);
expect(result.fnArray.length).toEqual(3);
expect(result.fnArray[0]).toEqual(OPS.eoFillStroke);
expect(result.fnArray[1]).toEqual(OPS.fillStroke);
expect(result.fnArray[2]).toEqual(OPS.eoFill);
done();
});
});
it('should handle glued operations and operands', function (done) {
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var stream = new StringStream('f5 Ts');
runOperatorListCheck(evaluator, stream, new ResourcesMock(), function (result) {
expect(!!result.fnArray && !!result.argsArray).toEqual(true);
expect(result.fnArray.length).toEqual(2);
expect(result.fnArray[0]).toEqual(OPS.fill);
expect(result.fnArray[1]).toEqual(OPS.setTextRise);
expect(result.argsArray.length).toEqual(2);
expect(result.argsArray[1].length).toEqual(1);
expect(result.argsArray[1][0]).toEqual(5);
done();
});
});
it('should handle glued operations and literals', function (done) {
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var stream = new StringStream('trueifalserinulln');
runOperatorListCheck(evaluator, stream, new ResourcesMock(), function (result) {
expect(!!result.fnArray && !!result.argsArray).toEqual(true);
expect(result.fnArray.length).toEqual(3);
expect(result.fnArray[0]).toEqual(OPS.setFlatness);
expect(result.fnArray[1]).toEqual(OPS.setRenderingIntent);
expect(result.fnArray[2]).toEqual(OPS.endPath);
expect(result.argsArray.length).toEqual(3);
expect(result.argsArray[0].length).toEqual(1);
expect(result.argsArray[0][0]).toEqual(true);
expect(result.argsArray[1].length).toEqual(1);
expect(result.argsArray[1][0]).toEqual(false);
expect(result.argsArray[2]).toEqual(null);
done();
});
});
});
describe('validateNumberOfArgs', function () {
it('should execute if correct number of arguments', function (done) {
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var stream = new StringStream('5 1 d0');
runOperatorListCheck(evaluator, stream, new ResourcesMock(), function (result) {
expect(result.argsArray[0][0]).toEqual(5);
expect(result.argsArray[0][1]).toEqual(1);
expect(result.fnArray[0]).toEqual(OPS.setCharWidth);
done();
});
});
it('should execute if too many arguments', function (done) {
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var stream = new StringStream('5 1 4 d0');
runOperatorListCheck(evaluator, stream, new ResourcesMock(), function (result) {
expect(result.argsArray[0][0]).toEqual(1);
expect(result.argsArray[0][1]).toEqual(4);
expect(result.fnArray[0]).toEqual(OPS.setCharWidth);
done();
});
});
it('should execute if nested commands', function (done) {
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var stream = new StringStream('/F2 /GS2 gs 5.711 Tf');
runOperatorListCheck(evaluator, stream, new ResourcesMock(), function (result) {
expect(result.fnArray.length).toEqual(3);
expect(result.fnArray[0]).toEqual(OPS.setGState);
expect(result.fnArray[1]).toEqual(OPS.dependency);
expect(result.fnArray[2]).toEqual(OPS.setFont);
expect(result.argsArray.length).toEqual(3);
expect(result.argsArray[0].length).toEqual(1);
expect(result.argsArray[1].length).toEqual(1);
expect(result.argsArray[2].length).toEqual(2);
done();
});
});
it('should skip if too few arguments', function (done) {
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var stream = new StringStream('5 d0');
runOperatorListCheck(evaluator, stream, new ResourcesMock(), function (result) {
expect(result.argsArray).toEqual([]);
expect(result.fnArray).toEqual([]);
done();
});
});
it('should close opened saves', function (done) {
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var stream = new StringStream('qq');
runOperatorListCheck(evaluator, stream, new ResourcesMock(), function (result) {
expect(!!result.fnArray && !!result.argsArray).toEqual(true);
expect(result.fnArray.length).toEqual(4);
expect(result.fnArray[0]).toEqual(OPS.save);
expect(result.fnArray[1]).toEqual(OPS.save);
expect(result.fnArray[2]).toEqual(OPS.restore);
expect(result.fnArray[3]).toEqual(OPS.restore);
done();
});
});
it('should skip paintXObject if name is missing', function (done) {
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var stream = new StringStream('/ Do');
runOperatorListCheck(evaluator, stream, new ResourcesMock(), function (result) {
expect(result.argsArray).toEqual([]);
expect(result.fnArray).toEqual([]);
done();
});
});
it('should skip paintXObject if subtype is PS', function (done) {
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var xobjStreamDict = new Dict();
xobjStreamDict.set('Subtype', Name.get('PS'));
var xobjStream = new Stream([], 0, 0, xobjStreamDict);
var xobjs = new Dict();
xobjs.set('Res1', xobjStream);
var resources = new Dict();
resources.set('XObject', xobjs);
var stream = new StringStream('/Res1 Do');
runOperatorListCheck(evaluator, stream, resources, function (result) {
expect(result.argsArray).toEqual([]);
expect(result.fnArray).toEqual([]);
done();
});
});
});
describe('thread control', function () {
it('should abort operator list parsing', function (done) {
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var stream = new StringStream('qqQQ');
var resources = new ResourcesMock();
var result = new OperatorList();
var task = new WorkerTask('OperatorListAbort');
task.terminate();
evaluator.getOperatorList(stream, task, resources, result).catch(function () {
expect(!!result.fnArray && !!result.argsArray).toEqual(true);
expect(result.fnArray.length).toEqual(0);
done();
});
});
it('should abort text parsing parsing', function (done) {
var resources = new ResourcesMock();
var evaluator = new PartialEvaluator(new PdfManagerMock(), new XrefMock(), new HandlerMock(), 'prefix');
var stream = new StringStream('qqQQ');
var task = new WorkerTask('TextContentAbort');
task.terminate();
evaluator.getTextContent(stream, task, resources).catch(function () {
expect(true).toEqual(true);
done();
});
});
});
describe('operator list', function () {
function MessageHandlerMock() {}
MessageHandlerMock.prototype = {
send: function send() {}
};
it('should get correct total length after flushing', function () {
var operatorList = new OperatorList(null, new MessageHandlerMock());
operatorList.addOp(OPS.save, null);
operatorList.addOp(OPS.restore, null);
expect(operatorList.totalLength).toEqual(2);
expect(operatorList.length).toEqual(2);
operatorList.flush();
expect(operatorList.totalLength).toEqual(2);
expect(operatorList.length).toEqual(0);
});
});
});