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XFA - Add a lexer/parser for FormCalc language (#12936)
- the language specifications are: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.364.2157&rep=rep1&type=pdf#page=1049 - it can be used to: * as a scripting language for calculation, validations, ... * in SOM expressions to select nodes: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.364.2157&rep=rep1&type=pdf#page=101
This commit is contained in:
calixteman
GitHub
parent
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commit
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5 changed files with 2456 additions and 0 deletions
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@ -39,6 +39,7 @@
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"unicode_spec.js",
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"util_spec.js",
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"writer_spec.js",
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"xfa_formcalc_spec.js",
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"xfa_parser_spec.js",
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"xml_spec.js"
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]
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@ -85,6 +85,7 @@ async function initializePDFJS(callback) {
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"pdfjs-test/unit/unicode_spec.js",
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"pdfjs-test/unit/util_spec.js",
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"pdfjs-test/unit/writer_spec.js",
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"pdfjs-test/unit/xfa_formcalc_spec.js",
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"pdfjs-test/unit/xfa_parser_spec.js",
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"pdfjs-test/unit/xml_spec.js",
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].map(function (moduleName) {
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729
test/unit/xfa_formcalc_spec.js
Normal file
729
test/unit/xfa_formcalc_spec.js
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@ -0,0 +1,729 @@
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/* Copyright 2020 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 { Errors, Parser } from "../../src/core/xfa/formcalc_parser.js";
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import { Lexer, Token, TOKEN } from "../../src/core/xfa/formcalc_lexer.js";
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describe("FormCalc expression parser", function () {
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const EOF = new Token(TOKEN.eof);
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describe("FormCalc lexer", function () {
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it("should lex numbers", function () {
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const lexer = new Lexer(
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"12 1.2345 .7 .12345 1e-2 1.2E+3 1e2 1.2E3 nan 12. 2.e3 infinity 99999999999999999 123456789.012345678 9e99999"
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);
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expect(lexer.next()).toEqual(new Token(TOKEN.number, 12));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, 1.2345));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, 0.7));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, 0.12345));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, 1e-2));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, 1.2e3));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, 1e2));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, 1.2e3));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, NaN));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, 12));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, 2e3));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, Infinity));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, 100000000000000000));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, 123456789.01234567));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, Infinity));
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expect(lexer.next()).toEqual(EOF);
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});
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it("should lex strings", function () {
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const lexer = new Lexer(
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`"hello world" "hello ""world" "hello ""world"" ""world""""hello""" "hello \\uabcdeh \\Uabcd \\u00000123abc" "a \\a \\ub \\Uc \\b"`
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);
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expect(lexer.next()).toEqual(new Token(TOKEN.string, `hello world`));
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expect(lexer.next()).toEqual(new Token(TOKEN.string, `hello "world`));
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expect(lexer.next()).toEqual(
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new Token(TOKEN.string, `hello "world" "world""hello"`)
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);
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expect(lexer.next()).toEqual(
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new Token(TOKEN.string, `hello \uabcdeh \uabcd \u0123abc`)
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);
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expect(lexer.next()).toEqual(
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new Token(TOKEN.string, `a \\a \\ub \\Uc \\b`)
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);
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expect(lexer.next()).toEqual(EOF);
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});
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it("should lex operators", function () {
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const lexer = new Lexer("( , ) <= <> = == >= < > / * . .* .# [ ] & |");
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expect(lexer.next()).toEqual(new Token(TOKEN.leftParen));
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expect(lexer.next()).toEqual(new Token(TOKEN.comma));
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expect(lexer.next()).toEqual(new Token(TOKEN.rightParen));
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expect(lexer.next()).toEqual(new Token(TOKEN.le));
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expect(lexer.next()).toEqual(new Token(TOKEN.ne));
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expect(lexer.next()).toEqual(new Token(TOKEN.assign));
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expect(lexer.next()).toEqual(new Token(TOKEN.eq));
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expect(lexer.next()).toEqual(new Token(TOKEN.ge));
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expect(lexer.next()).toEqual(new Token(TOKEN.lt));
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expect(lexer.next()).toEqual(new Token(TOKEN.gt));
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expect(lexer.next()).toEqual(new Token(TOKEN.divide));
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expect(lexer.next()).toEqual(new Token(TOKEN.times));
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expect(lexer.next()).toEqual(new Token(TOKEN.dot));
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expect(lexer.next()).toEqual(new Token(TOKEN.dotStar));
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expect(lexer.next()).toEqual(new Token(TOKEN.dotHash));
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expect(lexer.next()).toEqual(new Token(TOKEN.leftBracket));
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expect(lexer.next()).toEqual(new Token(TOKEN.rightBracket));
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expect(lexer.next()).toEqual(new Token(TOKEN.and));
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expect(lexer.next()).toEqual(new Token(TOKEN.or));
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expect(lexer.next()).toEqual(EOF);
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});
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it("should skip comments", function () {
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const lexer = new Lexer(`
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\t\t 1 \r\n\r\n
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; blah blah blah
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2
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// blah blah blah blah blah
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3
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`);
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expect(lexer.next()).toEqual(new Token(TOKEN.number, 1));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, 2));
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expect(lexer.next()).toEqual(new Token(TOKEN.number, 3));
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expect(lexer.next()).toEqual(EOF);
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});
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it("should lex identifiers", function () {
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const lexer = new Lexer(
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"eq for fore while continue hello こんにちは世界 $!hello今日は12今日は"
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);
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expect(lexer.next()).toEqual(new Token(TOKEN.eq));
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expect(lexer.next()).toEqual(new Token(TOKEN.for));
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expect(lexer.next()).toEqual(new Token(TOKEN.identifier, "fore"));
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expect(lexer.next()).toEqual(new Token(TOKEN.while));
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expect(lexer.next()).toEqual(new Token(TOKEN.continue));
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expect(lexer.next()).toEqual(new Token(TOKEN.identifier, "hello"));
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expect(lexer.next()).toEqual(
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new Token(TOKEN.identifier, "こんにちは世界")
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);
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expect(lexer.next()).toEqual(new Token(TOKEN.identifier, "$"));
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expect(lexer.next()).toEqual(
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new Token(TOKEN.identifier, "!hello今日は12今日は")
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);
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expect(lexer.next()).toEqual(EOF);
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});
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});
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describe("FormCalc parser", function () {
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it("should parse basic arithmetic expression", function () {
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const parser = new Parser("1 + 2 * 3");
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expect(parser.parse().dump()[0]).toEqual(7);
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});
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it("should parse basic arithmetic expression with the same operator", function () {
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const parser = new Parser("1 + a + 3");
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expect(parser.parse().dump()[0]).toEqual({
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operator: "+",
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left: {
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operator: "+",
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left: 1,
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right: { id: "a" },
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},
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right: 3,
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});
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});
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it("should parse expressions with unary operators", function () {
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const parser = new Parser(`
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s = +x + 1
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t = -+u * 2
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t = +-u * 2
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u = -foo()
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`);
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expect(parser.parse().dump()).toEqual([
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{
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assignment: "s",
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expr: {
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operator: "+",
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left: { operator: "+", arg: { id: "x" } },
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right: 1,
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},
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},
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{
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assignment: "t",
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expr: {
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operator: "*",
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left: {
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operator: "-",
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arg: {
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operator: "+",
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arg: { id: "u" },
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},
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},
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right: 2,
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},
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},
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{
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assignment: "t",
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expr: {
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operator: "*",
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left: {
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operator: "+",
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arg: {
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operator: "-",
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arg: { id: "u" },
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},
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},
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right: 2,
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},
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},
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{
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assignment: "u",
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expr: {
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operator: "-",
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arg: {
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callee: { id: "foo" },
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params: [],
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},
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},
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},
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]);
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});
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it("should parse basic expression with a string", function () {
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const parser = new Parser(`(5 - "abc") * 3`);
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expect(parser.parse().dump()[0]).toEqual(15);
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});
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it("should parse basic expression with a calls", function () {
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const parser = new Parser(`foo(2, 3, a & b) or c * d + 1.234 / e`);
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expect(parser.parse().dump()[0]).toEqual({
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operator: "||",
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left: {
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callee: { id: "foo" },
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params: [
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2,
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3,
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{
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operator: "&&",
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left: { id: "a" },
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right: { id: "b" },
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},
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],
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},
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right: {
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operator: "+",
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left: {
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operator: "*",
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left: { id: "c" },
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right: { id: "d" },
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},
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right: {
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operator: "/",
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left: 1.234,
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right: { id: "e" },
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},
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},
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});
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});
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it("should parse basic expression with a subscript", function () {
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let parser = new Parser(`こんにちは世界[-0]`);
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let dump = parser.parse().dump()[0];
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expect(dump).toEqual({
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operand: { id: "こんにちは世界" },
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index: -0,
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});
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expect(Object.is(-0, dump.index)).toBe(true);
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parser = new Parser(`こんにちは世界[+0]`);
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dump = parser.parse().dump()[0];
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expect(dump).toEqual({
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operand: { id: "こんにちは世界" },
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index: +0,
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});
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expect(Object.is(+0, dump.index)).toBe(true);
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parser = new Parser(`こんにちは世界[*]`);
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expect(parser.parse().dump()[0]).toEqual({
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operand: { id: "こんにちは世界" },
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index: { special: "*" },
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});
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});
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it("should parse basic expression with dots", function () {
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const parser = new Parser("a.b.c.#d..e.f..g.*");
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expect(parser.parse().dump()[0]).toEqual({
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operator: ".",
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left: { id: "a" },
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right: {
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operator: ".",
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left: { id: "b" },
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right: {
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operator: ".#",
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left: { id: "c" },
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right: {
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operator: "..",
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left: { id: "d" },
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right: {
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operator: ".",
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left: { id: "e" },
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right: {
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operator: "..",
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left: { id: "f" },
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right: {
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operator: ".",
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left: { id: "g" },
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right: { special: "*" },
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},
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},
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},
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},
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},
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},
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});
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});
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it("should parse var declaration with error", function () {
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let parser = new Parser("var 123 = a");
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expect(() => parser.parse()).toThrow(new Error(Errors.var));
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parser = new Parser(`var "123" = a`);
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expect(() => parser.parse()).toThrow(new Error(Errors.var));
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parser = new Parser(`var for var a`);
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expect(() => parser.parse()).toThrow(new Error(Errors.var));
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});
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it("should parse for declaration with a step", function () {
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const parser = new Parser(`
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var s = 0
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for var i = 1 upto 10 + x step 1 do
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s = s + i * 2
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endfor`);
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expect(parser.parse().dump()).toEqual([
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{
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var: "s",
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expr: 0,
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},
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{
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decl: "for",
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assignment: {
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var: "i",
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expr: 1,
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},
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type: "upto",
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end: {
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operator: "+",
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left: 10,
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right: { id: "x" },
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},
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step: 1,
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body: [
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{
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assignment: "s",
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expr: {
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operator: "+",
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left: { id: "s" },
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right: {
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operator: "*",
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left: { id: "i" },
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right: 2,
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},
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},
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},
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],
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},
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]);
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});
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it("should parse for declaration without a step", function () {
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const parser = new Parser(`
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for i = 1 + 2 downto 10 do
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s = foo()
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endfor`);
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expect(parser.parse().dump()).toEqual([
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{
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decl: "for",
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assignment: {
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assignment: "i",
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expr: 3,
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},
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type: "downto",
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end: 10,
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step: null,
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body: [
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{
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assignment: "s",
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expr: {
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callee: { id: "foo" },
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params: [],
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},
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},
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],
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},
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]);
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});
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it("should parse for declaration with error", function () {
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let parser = new Parser("for 123 = i upto 1 do a = 1 endfor");
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expect(() => parser.parse()).toThrow(new Error(Errors.assignment));
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parser = new Parser("for var 123 = i upto 1 do a = 1 endfor");
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expect(() => parser.parse()).toThrow(new Error(Errors.assignment));
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parser = new Parser("for var i = 123 upt 1 do a = 1 endfor");
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expect(() => parser.parse()).toThrow(new Error(Errors.for));
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parser = new Parser("for var i = 123 var 1 do a = 1 endfor");
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expect(() => parser.parse()).toThrow(new Error(Errors.for));
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parser = new Parser(
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"for var i = 123 upto 1 step for var j = 1 do endfor do a = 1 endfor"
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);
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expect(() => parser.parse()).toThrow(new Error(Errors.for));
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parser = new Parser("for var i = 123 downto 1 do a = 1 endfunc");
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expect(() => parser.parse()).toThrow(new Error(Errors.for));
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parser = new Parser("for var i = 123 downto 1 do a = 1");
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expect(() => parser.parse()).toThrow(new Error(Errors.for));
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});
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it("should parse foreach declaration", function () {
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const parser = new Parser(`
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foreach i in (a, b, c, d) do
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s = foo()[i]
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endfor`);
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expect(parser.parse().dump()).toEqual([
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{
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decl: "foreach",
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id: "i",
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params: [{ id: "a" }, { id: "b" }, { id: "c" }, { id: "d" }],
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body: [
|
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{
|
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assignment: "s",
|
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expr: {
|
||||
operand: {
|
||||
callee: { id: "foo" },
|
||||
params: [],
|
||||
},
|
||||
index: { id: "i" },
|
||||
},
|
||||
},
|
||||
],
|
||||
},
|
||||
]);
|
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});
|
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|
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it("should parse foreach declaration with error", function () {
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let parser = new Parser("foreach 123 in (1, 2, 3) do a = 1 endfor");
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expect(() => parser.parse()).toThrow(new Error(Errors.foreach));
|
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parser = new Parser("foreach foo in 1, 2, 3) do a = 1 endfor");
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expect(() => parser.parse()).toThrow(new Error(Errors.foreach));
|
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|
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parser = new Parser("foreach foo in (1, 2, 3 do a = 1 endfor");
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expect(() => parser.parse()).toThrow(new Error(Errors.params));
|
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|
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parser = new Parser("foreach foo in (1, 2 3) do a = 1 endfor");
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expect(() => parser.parse()).toThrow(new Error(Errors.params));
|
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|
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parser = new Parser("foreach foo in (1, 2, 3) od a = 1 endfor");
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expect(() => parser.parse()).toThrow(new Error(Errors.foreach));
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|
||||
parser = new Parser("foreach foo in (1, 2, 3) do a = 1 endforeach");
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.foreach));
|
||||
|
||||
parser = new Parser("foreach foo in (1, 2, 3) do a = 1 123");
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.foreach));
|
||||
});
|
||||
|
||||
it("should parse while declaration", function () {
|
||||
const parser = new Parser(`
|
||||
while (1) do
|
||||
if (0) then
|
||||
break
|
||||
else
|
||||
continue
|
||||
endif
|
||||
endwhile
|
||||
`);
|
||||
expect(parser.parse().dump()).toEqual([
|
||||
{
|
||||
decl: "while",
|
||||
condition: 1,
|
||||
body: [
|
||||
{
|
||||
decl: "if",
|
||||
condition: 0,
|
||||
then: [{ special: "break" }],
|
||||
elseif: null,
|
||||
else: [{ special: "continue" }],
|
||||
},
|
||||
],
|
||||
},
|
||||
]);
|
||||
});
|
||||
|
||||
it("should parse while declaration with error", function () {
|
||||
let parser = new Parser("while a == 1 do a = 2 endwhile");
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.while));
|
||||
|
||||
parser = new Parser("while (a == 1 do a = 2 endwhile");
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.while));
|
||||
|
||||
parser = new Parser("while (a == 1) var a = 2 endwhile");
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.while));
|
||||
|
||||
parser = new Parser("while (a == 1) do var a = 2 end");
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.while));
|
||||
});
|
||||
|
||||
it("should parse do declaration", function () {
|
||||
const parser = new Parser(`
|
||||
do
|
||||
x = 1
|
||||
; a comment in the middle of the block
|
||||
y = 2
|
||||
end
|
||||
`);
|
||||
expect(parser.parse().dump()).toEqual([
|
||||
{
|
||||
decl: "block",
|
||||
body: [
|
||||
{
|
||||
assignment: "x",
|
||||
expr: 1,
|
||||
},
|
||||
{
|
||||
assignment: "y",
|
||||
expr: 2,
|
||||
},
|
||||
],
|
||||
},
|
||||
]);
|
||||
});
|
||||
|
||||
it("should parse do declaration with error", function () {
|
||||
const parser = new Parser(`
|
||||
do
|
||||
x = 1
|
||||
y = 2
|
||||
endfunc
|
||||
`);
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.block));
|
||||
});
|
||||
|
||||
it("should parse func declaration", function () {
|
||||
const parser = new Parser(`
|
||||
func こんにちは世界123(a, b) do
|
||||
a + b
|
||||
endfunc
|
||||
`);
|
||||
expect(parser.parse().dump()).toEqual([
|
||||
{
|
||||
func: "こんにちは世界123",
|
||||
params: ["a", "b"],
|
||||
body: [
|
||||
{
|
||||
operator: "+",
|
||||
left: { id: "a" },
|
||||
right: { id: "b" },
|
||||
},
|
||||
],
|
||||
},
|
||||
]);
|
||||
});
|
||||
|
||||
it("should parse func declaration with error", function () {
|
||||
let parser = new Parser("func 123(a, b) do a = 1 endfunc");
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.func));
|
||||
|
||||
parser = new Parser("func foo(a, b) for a = 1 endfunc");
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.func));
|
||||
|
||||
parser = new Parser("func foo(a, b) do a = 1 endfun");
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.func));
|
||||
|
||||
parser = new Parser("func foo(a, b, c do a = 1 endfunc");
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.func));
|
||||
|
||||
parser = new Parser("func foo(a, b, 123) do a = 1 endfunc");
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.func));
|
||||
});
|
||||
|
||||
it("should parse if declaration", function () {
|
||||
const parser = new Parser(`
|
||||
if (a & b) then
|
||||
var s = 1
|
||||
endif
|
||||
|
||||
if (a or b) then
|
||||
var s = 1
|
||||
else
|
||||
var x = 2
|
||||
endif
|
||||
|
||||
if (0) then
|
||||
s = 1
|
||||
elseif (1) then
|
||||
s = 2
|
||||
elseif (2) then
|
||||
s = 3
|
||||
elseif (3) then
|
||||
s = 4
|
||||
else
|
||||
s = 5
|
||||
endif
|
||||
|
||||
// a comment
|
||||
|
||||
if (0) then
|
||||
s = 1
|
||||
elseif (1) then
|
||||
s = 2
|
||||
endif
|
||||
`);
|
||||
expect(parser.parse().dump()).toEqual([
|
||||
{
|
||||
decl: "if",
|
||||
condition: {
|
||||
operator: "&&",
|
||||
left: { id: "a" },
|
||||
right: { id: "b" },
|
||||
},
|
||||
then: [
|
||||
{
|
||||
var: "s",
|
||||
expr: 1,
|
||||
},
|
||||
],
|
||||
elseif: null,
|
||||
else: null,
|
||||
},
|
||||
{
|
||||
decl: "if",
|
||||
condition: {
|
||||
operator: "||",
|
||||
left: { id: "a" },
|
||||
right: { id: "b" },
|
||||
},
|
||||
then: [
|
||||
{
|
||||
var: "s",
|
||||
expr: 1,
|
||||
},
|
||||
],
|
||||
elseif: null,
|
||||
else: [
|
||||
{
|
||||
var: "x",
|
||||
expr: 2,
|
||||
},
|
||||
],
|
||||
},
|
||||
{
|
||||
decl: "if",
|
||||
condition: 0,
|
||||
then: [
|
||||
{
|
||||
assignment: "s",
|
||||
expr: 1,
|
||||
},
|
||||
],
|
||||
elseif: [
|
||||
{
|
||||
decl: "elseif",
|
||||
condition: 1,
|
||||
then: [
|
||||
{
|
||||
assignment: "s",
|
||||
expr: 2,
|
||||
},
|
||||
],
|
||||
},
|
||||
{
|
||||
decl: "elseif",
|
||||
condition: 2,
|
||||
then: [
|
||||
{
|
||||
assignment: "s",
|
||||
expr: 3,
|
||||
},
|
||||
],
|
||||
},
|
||||
{
|
||||
decl: "elseif",
|
||||
condition: 3,
|
||||
then: [
|
||||
{
|
||||
assignment: "s",
|
||||
expr: 4,
|
||||
},
|
||||
],
|
||||
},
|
||||
],
|
||||
else: [
|
||||
{
|
||||
assignment: "s",
|
||||
expr: 5,
|
||||
},
|
||||
],
|
||||
},
|
||||
{
|
||||
decl: "if",
|
||||
condition: 0,
|
||||
then: [
|
||||
{
|
||||
assignment: "s",
|
||||
expr: 1,
|
||||
},
|
||||
],
|
||||
elseif: [
|
||||
{
|
||||
decl: "elseif",
|
||||
condition: 1,
|
||||
then: [
|
||||
{
|
||||
assignment: "s",
|
||||
expr: 2,
|
||||
},
|
||||
],
|
||||
},
|
||||
],
|
||||
else: null,
|
||||
},
|
||||
]);
|
||||
});
|
||||
|
||||
it("should parse if declaration with error", function () {
|
||||
let parser = new Parser("if foo == 1 then a = 1 endif");
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.if));
|
||||
|
||||
parser = new Parser("if (foo == 1 then a = 1 endif");
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.if));
|
||||
|
||||
parser = new Parser(
|
||||
"if (foo == 1) then a = 1 elseiff (foo == 2) then a = 2 endif"
|
||||
);
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.if));
|
||||
|
||||
parser = new Parser(
|
||||
"if (foo == 1) then a = 1 elseif (foo == 2) then a = 2 end"
|
||||
);
|
||||
expect(() => parser.parse()).toThrow(new Error(Errors.if));
|
||||
});
|
||||
});
|
||||
});
|
||||
Loading…
Add table
Add a link
Reference in a new issue