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fix(compiler): ignore @import in comments (#13368) 

* refactor(compiler): clean up style url resolver
* fix(compiler): ignore @import in css comments

Closes #12196
This commit is contained in:
Dzmitry Shylovich 2016-12-21 04:51:02 +03:00 committed by Chuck Jazdzewski
parent bcd37f52fb
commit c0f750af4e
2 changed files with 27 additions and 15 deletions
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31
modules/@angular/compiler/src/style_url_resolver.ts
View File

@ -9,8 +9,6 @@
// Some of the code comes from WebComponents.JS
// https://github.com/webcomponents/webcomponentsjs/blob/master/src/HTMLImports/path.js
import {isBlank, isPresent} from './facade/lang';
import {UrlResolver} from './url_resolver';
export class StyleWithImports {
@ -18,8 +16,8 @@ export class StyleWithImports {
}
export function isStyleUrlResolvable(url: string): boolean {
if (isBlank(url) || url.length === 0 || url[0] == '/') return false;
const schemeMatch = url.match(_urlWithSchemaRe);
if (url == null || url.length === 0 || url[0] == '/') return false;
const schemeMatch = url.match(URL_WITH_SCHEMA_REGEXP);
return schemeMatch === null || schemeMatch[1] == 'package' || schemeMatch[1] == 'asset';
}
@ -30,17 +28,20 @@ export function isStyleUrlResolvable(url: string): boolean {
export function extractStyleUrls(
resolver: UrlResolver, baseUrl: string, cssText: string): StyleWithImports {
const foundUrls: string[] = [];
const modifiedCssText = cssText.replace(_cssImportRe, function(...m: string[]) {
const url = m[1] || m[2];
if (!isStyleUrlResolvable(url)) {
// Do not attempt to resolve non-package absolute URLs with URI scheme
return m[0];
}
foundUrls.push(resolver.resolve(baseUrl, url));
return '';
});
const modifiedCssText =
cssText.replace(CSS_COMMENT_REGEXP, '').replace(CSS_IMPORT_REGEXP, (...m: string[]) => {
const url = m[1] || m[2];
if (!isStyleUrlResolvable(url)) {
// Do not attempt to resolve non-package absolute URLs with URI scheme
return m[0];
}
foundUrls.push(resolver.resolve(baseUrl, url));
return '';
});
return new StyleWithImports(modifiedCssText, foundUrls);
}
const _cssImportRe = /@import\s+(?:url\()?\s*(?:(?:['"]([^'"]*))|([^;\)\s]*))[^;]*;?/g;
const _urlWithSchemaRe = /^([^:/?#]+):/;
const CSS_IMPORT_REGEXP = /@import\s+(?:url\()?\s*(?:(?:['"]([^'"]*))|([^;\)\s]*))[^;]*;?/g;
const CSS_COMMENT_REGEXP = /\/\*.+?\*\//g;
const URL_WITH_SCHEMA_REGEXP = /^([^:/?#]+):/;

11
modules/@angular/compiler/test/style_url_resolver_spec.ts
View File

@ -36,6 +36,17 @@ export function main() {
expect(styleWithImports.styleUrls).toEqual(['http://ng.io/1.css', 'http://ng.io/2.css']);
});
it('should ignore "@import" in comments', () => {
const css = `
@import '1.css';
/*@import '2.css';*/
`;
const styleWithImports = extractStyleUrls(urlResolver, 'http://ng.io', css);
expect(styleWithImports.style.trim()).toEqual('');
expect(styleWithImports.styleUrls).toContain('http://ng.io/1.css');
expect(styleWithImports.styleUrls).not.toContain('http://ng.io/2.css');
});
it('should extract "@import url()" urls', () => {
const css = `
@import url('3.css');