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refactor(compiler): move the line-ending handling decision (#38581) 

Previously the lexer was responsible for deciding whether an "inline"
template should also have its line-endings normalized.

Now this decision is made higher up in the call stack to allow more
flexibility in the parser/lexer.

PR Close #38581
This commit is contained in:
Pete Bacon Darwin 2020-08-25 21:27:00 +01:00 committed by Andrew Scott
parent 5da1934115
commit 86e11f1110
4 changed files with 234 additions and 125 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
packages/compiler-cli/src/ngtsc/annotations/src/component.ts
View File

@ -771,6 +771,9 @@ export class ComponentDecoratorHandler implements
interpolation = InterpolationConfig.fromArray(value as [string, string]);
}
// We always normalize line endings if the template has been escaped (i.e. is inline).
const i18nNormalizeLineEndingsInICUs = escapedString || this.i18nNormalizeLineEndingsInICUs;
const {errors, nodes: emitNodes, styleUrls, styles, ngContentSelectors} =
parseTemplate(templateStr, templateUrl, {
preserveWhitespaces,
@ -778,7 +781,7 @@ export class ComponentDecoratorHandler implements
range: templateRange,
escapedString,
enableI18nLegacyMessageIdFormat: this.enableI18nLegacyMessageIdFormat,
i18nNormalizeLineEndingsInICUs: this.i18nNormalizeLineEndingsInICUs,
i18nNormalizeLineEndingsInICUs,
});
// Unfortunately, the primary parse of the template above may not contain accurate source map
@ -800,7 +803,7 @@ export class ComponentDecoratorHandler implements
range: templateRange,
escapedString,
enableI18nLegacyMessageIdFormat: this.enableI18nLegacyMessageIdFormat,
i18nNormalizeLineEndingsInICUs: this.i18nNormalizeLineEndingsInICUs,
i18nNormalizeLineEndingsInICUs,
leadingTriviaChars: [],
});

8
packages/compiler/src/ml_parser/lexer.ts
View File

@ -642,13 +642,11 @@ class _Tokenizer {
this._beginToken(TokenType.RAW_TEXT);
const condition = this._readUntil(chars.$COMMA);
const normalizedCondition = this._processCarriageReturns(condition);
if (this._escapedString || this._i18nNormalizeLineEndingsInICUs) {
// Either the template is inline or,
// we explicitly want to normalize line endings for this text.
if (this._i18nNormalizeLineEndingsInICUs) {
// We explicitly want to normalize line endings for this text.
this._endToken([normalizedCondition]);
} else {
// The expression is in an external template and, for backward compatibility,
// we are not normalizing line endings.
// We are not normalizing line endings.
const conditionToken = this._endToken([condition]);
if (normalizedCondition !== condition) {
this.nonNormalizedIcuExpressions.push(conditionToken);

77
packages/compiler/test/ml_parser/html_parser_spec.ts
View File

@ -332,7 +332,8 @@ import {humanizeDom, humanizeDomSourceSpans, humanizeLineColumn} from './ast_spe
]);
});
it('should normalize line-endings in expansion forms in inline templates', () => {
it('should normalize line-endings in expansion forms in inline templates if `i18nNormalizeLineEndingsInICUs` is true',
() => {
const parsed = parser.parse(
`<div>\r\n` +
` {\r\n` +
@ -344,6 +345,7 @@ import {humanizeDom, humanizeDomSourceSpans, humanizeLineColumn} from './ast_spe
'TestComp', {
tokenizeExpansionForms: true,
escapedString: true,
i18nNormalizeLineEndingsInICUs: true,
});
expect(humanizeDom(parsed)).toEqual([
@ -367,6 +369,39 @@ import {humanizeDom, humanizeDomSourceSpans, humanizeLineColumn} from './ast_spe
expect(parsed.errors).toEqual([]);
});
it('should not normalize line-endings in ICU expressions in external templates when `i18nNormalizeLineEndingsInICUs` is not set',
() => {
const parsed = parser.parse(
`<div>\r\n` +
` {\r\n` +
` messages.length,\r\n` +
` plural,\r\n` +
` =0 {You have \r\nno\r\n messages}\r\n` +
` =1 {One {{message}}}}\r\n` +
`</div>`,
'TestComp', {tokenizeExpansionForms: true, escapedString: true});
expect(humanizeDom(parsed)).toEqual([
[html.Element, 'div', 0],
[html.Text, '\n ', 1],
[html.Expansion, '\r\n messages.length', 'plural', 1],
[html.ExpansionCase, '=0', 2],
[html.ExpansionCase, '=1', 2],
[html.Text, '\n', 1],
]);
const cases = (<any>parsed.rootNodes[0]).children[1].cases;
expect(humanizeDom(new ParseTreeResult(cases[0].expression, []))).toEqual([
[html.Text, 'You have \nno\n messages', 0],
]);
expect(humanizeDom(new ParseTreeResult(cases[1].expression, []))).toEqual([
[html.Text, 'One {{message}}', 0]
]);
expect(parsed.errors).toEqual([]);
});
it('should normalize line-endings in expansion forms in external templates if `i18nNormalizeLineEndingsInICUs` is true',
() => {
const parsed = parser.parse(
@ -468,7 +503,41 @@ import {humanizeDom, humanizeDomSourceSpans, humanizeLineColumn} from './ast_spe
]);
});
it('should normalize line endings in nested expansion forms for inline templates', () => {
it('should normalize line endings in nested expansion forms for inline templates, when `i18nNormalizeLineEndingsInICUs` is true',
() => {
const parsed = parser.parse(
`{\r\n` +
` messages.length, plural,\r\n` +
` =0 { zero \r\n` +
` {\r\n` +
` p.gender, select,\r\n` +
` male {m}\r\n` +
` }\r\n` +
` }\r\n` +
`}`,
'TestComp', {
tokenizeExpansionForms: true,
escapedString: true,
i18nNormalizeLineEndingsInICUs: true
});
expect(humanizeDom(parsed)).toEqual([
[html.Expansion, '\n messages.length', 'plural', 0],
[html.ExpansionCase, '=0', 1],
]);
const expansion = parsed.rootNodes[0] as html.Expansion;
expect(humanizeDom(new ParseTreeResult(expansion.cases[0].expression, []))).toEqual([
[html.Text, 'zero \n ', 0],
[html.Expansion, '\n p.gender', 'select', 0],
[html.ExpansionCase, 'male', 1],
[html.Text, '\n ', 0],
]);
expect(parsed.errors).toEqual([]);
});
it('should not normalize line endings in nested expansion forms for inline templates, when `i18nNormalizeLineEndingsInICUs` is not defined',
() => {
const parsed = parser.parse(
`{\r\n` +
` messages.length, plural,\r\n` +
@ -481,14 +550,14 @@ import {humanizeDom, humanizeDomSourceSpans, humanizeLineColumn} from './ast_spe
`}`,
'TestComp', {tokenizeExpansionForms: true, escapedString: true});
expect(humanizeDom(parsed)).toEqual([
[html.Expansion, '\n messages.length', 'plural', 0],
[html.Expansion, '\r\n messages.length', 'plural', 0],
[html.ExpansionCase, '=0', 1],
]);
const expansion = parsed.rootNodes[0] as html.Expansion;
expect(humanizeDom(new ParseTreeResult(expansion.cases[0].expression, []))).toEqual([
[html.Text, 'zero \n ', 0],
[html.Expansion, '\n p.gender', 'select', 0],
[html.Expansion, '\r\n p.gender', 'select', 0],
[html.ExpansionCase, 'male', 1],
[html.Text, '\n ', 0],
]);

49
packages/compiler/test/ml_parser/lexer_spec.ts
View File

@ -885,7 +885,8 @@ import {ParseLocation, ParseSourceFile, ParseSourceSpan} from '../../src/parse_u
describe('[line ending normalization', () => {
describe('{escapedString: true}', () => {
it('should normalize line-endings in expansion forms', () => {
it('should normalize line-endings in expansion forms if `i18nNormalizeLineEndingsInICUs` is true',
() => {
const result = tokenizeWithoutErrors(
`{\r\n` +
` messages.length,\r\n` +
@ -895,6 +896,7 @@ import {ParseLocation, ParseSourceFile, ParseSourceSpan} from '../../src/parse_u
{
tokenizeExpansionForms: true,
escapedString: true,
i18nNormalizeLineEndingsInICUs: true
});
expect(humanizeParts(result.tokens)).toEqual([
@ -917,7 +919,40 @@ import {ParseLocation, ParseSourceFile, ParseSourceSpan} from '../../src/parse_u
expect(result.nonNormalizedIcuExpressions).toEqual([]);
});
it('should normalize line endings in nested expansion forms for inline templates', () => {
it('should not normalize line-endings in ICU expressions when `i18nNormalizeLineEndingsInICUs` is not defined',
() => {
const result = tokenizeWithoutErrors(
`{\r\n` +
` messages.length,\r\n` +
` plural,\r\n` +
` =0 {You have \r\nno\r\n messages}\r\n` +
` =1 {One {{message}}}}\r\n`,
{tokenizeExpansionForms: true, escapedString: true});
expect(humanizeParts(result.tokens)).toEqual([
[lex.TokenType.EXPANSION_FORM_START],
[lex.TokenType.RAW_TEXT, '\r\n messages.length'],
[lex.TokenType.RAW_TEXT, 'plural'],
[lex.TokenType.EXPANSION_CASE_VALUE, '=0'],
[lex.TokenType.EXPANSION_CASE_EXP_START],
[lex.TokenType.TEXT, 'You have \nno\n messages'],
[lex.TokenType.EXPANSION_CASE_EXP_END],
[lex.TokenType.EXPANSION_CASE_VALUE, '=1'],
[lex.TokenType.EXPANSION_CASE_EXP_START],
[lex.TokenType.TEXT, 'One {{message}}'],
[lex.TokenType.EXPANSION_CASE_EXP_END],
[lex.TokenType.EXPANSION_FORM_END],
[lex.TokenType.TEXT, '\n'],
[lex.TokenType.EOF],
]);
expect(result.nonNormalizedIcuExpressions!.length).toBe(1);
expect(result.nonNormalizedIcuExpressions![0].sourceSpan.toString())
.toEqual('\r\n messages.length');
});
it('should not normalize line endings in nested expansion forms when `i18nNormalizeLineEndingsInICUs` is not defined',
() => {
const result = tokenizeWithoutErrors(
`{\r\n` +
` messages.length, plural,\r\n` +
@ -931,14 +966,14 @@ import {ParseLocation, ParseSourceFile, ParseSourceSpan} from '../../src/parse_u
{tokenizeExpansionForms: true, escapedString: true});
expect(humanizeParts(result.tokens)).toEqual([
[lex.TokenType.EXPANSION_FORM_START],
[lex.TokenType.RAW_TEXT, '\n messages.length'],
[lex.TokenType.RAW_TEXT, '\r\n messages.length'],
[lex.TokenType.RAW_TEXT, 'plural'],
[lex.TokenType.EXPANSION_CASE_VALUE, '=0'],
[lex.TokenType.EXPANSION_CASE_EXP_START],
[lex.TokenType.TEXT, 'zero \n '],
[lex.TokenType.EXPANSION_FORM_START],
[lex.TokenType.RAW_TEXT, '\n p.gender'],
[lex.TokenType.RAW_TEXT, '\r\n p.gender'],
[lex.TokenType.RAW_TEXT, 'select'],
[lex.TokenType.EXPANSION_CASE_VALUE, 'male'],
[lex.TokenType.EXPANSION_CASE_EXP_START],
@ -952,7 +987,11 @@ import {ParseLocation, ParseSourceFile, ParseSourceSpan} from '../../src/parse_u
[lex.TokenType.EOF],
]);
expect(result.nonNormalizedIcuExpressions).toEqual([]);
expect(result.nonNormalizedIcuExpressions!.length).toBe(2);
expect(result.nonNormalizedIcuExpressions![0].sourceSpan.toString())
.toEqual('\r\n messages.length');
expect(result.nonNormalizedIcuExpressions![1].sourceSpan.toString())
.toEqual('\r\n p.gender');
});
});