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fix(shadow_css): strip comments and fix logic for parsing rules. 

Closes #5037
Closes #5011
This commit is contained in:
Tobias Bosch 2015-10-30 15:09:04 -07:00
parent 53bddec1d2
commit d8775e0e1f
2 changed files with 157 additions and 116 deletions
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205
modules/angular2/src/core/compiler/shadow_css.ts
View File

@ -139,14 +139,6 @@ export class ShadowCss {
constructor() {}
/*
* Shim a style element with the given selector. Returns cssText that can
* be included in the document via WebComponents.ShadowCSS.addCssToDocument(css).
*/
shimStyle(cssText: string, selector: string, hostSelector: string = ''): string {
return this.shimCssText(cssText, selector, hostSelector);
}
/*
* Shim some cssText with the given selector. Returns cssText that can
* be included in the document via WebComponents.ShadowCSS.addCssToDocument(css).
@ -156,12 +148,12 @@ export class ShadowCss {
* - hostSelector is the attribute added to the host itself.
*/
shimCssText(cssText: string, selector: string, hostSelector: string = ''): string {
cssText = stripComments(cssText);
cssText = this._insertDirectives(cssText);
return this._scopeCssText(cssText, selector, hostSelector);
}
/** @internal */
_insertDirectives(cssText: string): string {
private _insertDirectives(cssText: string): string {
cssText = this._insertPolyfillDirectivesInCssText(cssText);
return this._insertPolyfillRulesInCssText(cssText);
}
@ -180,8 +172,7 @@ export class ShadowCss {
* scopeName menu-item {
*
**/
/** @internal */
_insertPolyfillDirectivesInCssText(cssText: string): string {
private _insertPolyfillDirectivesInCssText(cssText: string): string {
// Difference with webcomponents.js: does not handle comments
return StringWrapper.replaceAllMapped(cssText, _cssContentNextSelectorRe,
function(m) { return m[1] + '{'; });
@ -202,8 +193,7 @@ export class ShadowCss {
* scopeName menu-item {...}
*
**/
/** @internal */
_insertPolyfillRulesInCssText(cssText: string): string {
private _insertPolyfillRulesInCssText(cssText: string): string {
// Difference with webcomponents.js: does not handle comments
return StringWrapper.replaceAllMapped(cssText, _cssContentRuleRe, function(m) {
var rule = m[0];
@ -221,8 +211,7 @@ export class ShadowCss {
*
* scopeName .foo { ... }
*/
/** @internal */
_scopeCssText(cssText: string, scopeSelector: string, hostSelector: string): string {
private _scopeCssText(cssText: string, scopeSelector: string, hostSelector: string): string {
var unscoped = this._extractUnscopedRulesFromCssText(cssText);
cssText = this._insertPolyfillHostInCssText(cssText);
cssText = this._convertColonHost(cssText);
@ -250,8 +239,7 @@ export class ShadowCss {
* menu-item {...}
*
**/
/** @internal */
_extractUnscopedRulesFromCssText(cssText: string): string {
private _extractUnscopedRulesFromCssText(cssText: string): string {
// Difference with webcomponents.js: does not handle comments
var r = '', m;
var matcher = RegExpWrapper.matcher(_cssContentUnscopedRuleRe, cssText);
@ -271,8 +259,7 @@ export class ShadowCss {
*
* scopeName.foo > .bar
*/
/** @internal */
_convertColonHost(cssText: string): string {
private _convertColonHost(cssText: string): string {
return this._convertColonRule(cssText, _cssColonHostRe, this._colonHostPartReplacer);
}
@ -291,14 +278,12 @@ export class ShadowCss {
*
* scopeName.foo .bar { ... }
*/
/** @internal */
_convertColonHostContext(cssText: string): string {
private _convertColonHostContext(cssText: string): string {
return this._convertColonRule(cssText, _cssColonHostContextRe,
this._colonHostContextPartReplacer);
}
/** @internal */
_convertColonRule(cssText: string, regExp: RegExp, partReplacer: Function): string {
private _convertColonRule(cssText: string, regExp: RegExp, partReplacer: Function): string {
// p1 = :host, p2 = contents of (), p3 rest of rule
return StringWrapper.replaceAllMapped(cssText, regExp, function(m) {
if (isPresent(m[2])) {
@ -316,8 +301,7 @@ export class ShadowCss {
});
}
/** @internal */
_colonHostContextPartReplacer(host: string, part: string, suffix: string): string {
private _colonHostContextPartReplacer(host: string, part: string, suffix: string): string {
if (StringWrapper.contains(part, _polyfillHost)) {
return this._colonHostPartReplacer(host, part, suffix);
} else {
@ -325,8 +309,7 @@ export class ShadowCss {
}
}
/** @internal */
_colonHostPartReplacer(host: string, part: string, suffix: string): string {
private _colonHostPartReplacer(host: string, part: string, suffix: string): string {
return host + StringWrapper.replace(part, _polyfillHost, '') + suffix;
}
@ -334,8 +317,7 @@ export class ShadowCss {
* Convert combinators like ::shadow and pseudo-elements like ::content
* by replacing with space.
*/
/** @internal */
_convertShadowDOMSelectors(cssText: string): string {
private _convertShadowDOMSelectors(cssText: string): string {
for (var i = 0; i < _shadowDOMSelectorsRe.length; i++) {
cssText = StringWrapper.replaceAll(cssText, _shadowDOMSelectorsRe[i], ' ');
}
@ -343,43 +325,22 @@ export class ShadowCss {
}
// change a selector like 'div' to 'name div'
/** @internal */
_scopeSelectors(cssText: string, scopeSelector: string, hostSelector: string): string {
var parts = splitCurlyBlocks(cssText);
var result = [];
for (var i = 0; i < parts.length; i += 2) {
var selectorTextWithCommands = parts[i];
var selectorStart = selectorTextWithCommands.lastIndexOf(';') + 1;
var selectorText =
selectorTextWithCommands.substring(selectorStart, selectorTextWithCommands.length);
var ruleContent = parts[i + 1];
var selectorMatch = RegExpWrapper.firstMatch(_singleSelectorRe, selectorText);
if (isPresent(selectorMatch) && ruleContent.length > 0) {
var selPrefix = selectorMatch[1];
var selAt = isPresent(selectorMatch[2]) ? selectorMatch[2] : '';
var selector = selectorMatch[3];
var selSuffix = selectorMatch[4];
if (selAt.length === 0 || selAt == '@page') {
var scopedSelector =
this._scopeSelector(selector, scopeSelector, hostSelector, this.strictStyling);
selectorText = `${selPrefix}${selAt}${scopedSelector}${selSuffix}`;
} else if (selAt == '@media' && ruleContent[0] == OPEN_CURLY &&
ruleContent[ruleContent.length - 1] == CLOSE_CURLY) {
var scopedContent = this._scopeSelectors(ruleContent.substring(1, ruleContent.length - 1),
scopeSelector, hostSelector);
ruleContent = `${OPEN_CURLY}${scopedContent}${CLOSE_CURLY}`;
}
private _scopeSelectors(cssText: string, scopeSelector: string, hostSelector: string): string {
return processRules(cssText, (rule: CssRule) => {
var selector = rule.selector;
var content = rule.content;
if (rule.selector[0] != '@' || rule.selector.startsWith('@page')) {
selector =
this._scopeSelector(rule.selector, scopeSelector, hostSelector, this.strictStyling);
} else if (rule.selector.startsWith('@media')) {
content = this._scopeSelectors(rule.content, scopeSelector, hostSelector);
}
result.push(selectorTextWithCommands.substring(0, selectorStart));
result.push(selectorText);
result.push(ruleContent);
}
return result.join('');
return new CssRule(selector, content);
});
}
/** @internal */
_scopeSelector(selector: string, scopeSelector: string, hostSelector: string,
strict: boolean): string {
private _scopeSelector(selector: string, scopeSelector: string, hostSelector: string,
strict: boolean): string {
var r = [], parts = selector.split(',');
for (var i = 0; i < parts.length; i++) {
var p = parts[i];
@ -394,14 +355,12 @@ export class ShadowCss {
return r.join(', ');
}
/** @internal */
_selectorNeedsScoping(selector: string, scopeSelector: string): boolean {
private _selectorNeedsScoping(selector: string, scopeSelector: string): boolean {
var re = this._makeScopeMatcher(scopeSelector);
return !isPresent(RegExpWrapper.firstMatch(re, selector));
}
/** @internal */
_makeScopeMatcher(scopeSelector: string): RegExp {
private _makeScopeMatcher(scopeSelector: string): RegExp {
var lre = /\[/g;
var rre = /\]/g;
scopeSelector = StringWrapper.replaceAll(scopeSelector, lre, '\\[');
@ -409,15 +368,15 @@ export class ShadowCss {
return RegExpWrapper.create('^(' + scopeSelector + ')' + _selectorReSuffix, 'm');
}
/** @internal */
_applySelectorScope(selector: string, scopeSelector: string, hostSelector: string): string {
private _applySelectorScope(selector: string, scopeSelector: string,
hostSelector: string): string {
// Difference from webcomponentsjs: scopeSelector could not be an array
return this._applySimpleSelectorScope(selector, scopeSelector, hostSelector);
}
// scope via name and [is=name]
/** @internal */
_applySimpleSelectorScope(selector: string, scopeSelector: string, hostSelector: string): string {
private _applySimpleSelectorScope(selector: string, scopeSelector: string,
hostSelector: string): string {
if (isPresent(RegExpWrapper.firstMatch(_polyfillHostRe, selector))) {
var replaceBy = this.strictStyling ? `[${hostSelector}]` : scopeSelector;
selector = StringWrapper.replace(selector, _polyfillHostNoCombinator, replaceBy);
@ -428,9 +387,8 @@ export class ShadowCss {
}
// return a selector with [name] suffix on each simple selector
// e.g. .foo.bar > .zot becomes .foo[name].bar[name] > .zot[name]
/** @internal */
_applyStrictSelectorScope(selector: string, scopeSelector: string): string {
// e.g. .foo.bar > .zot becomes .foo[name].bar[name] > .zot[name] /** @internal */
private _applyStrictSelectorScope(selector: string, scopeSelector: string): string {
var isRe = /\[is=([^\]]*)\]/g;
scopeSelector = StringWrapper.replaceAllMapped(scopeSelector, isRe, (m) => m[1]);
var splits = [' ', '>', '+', '~'], scoped = selector, attrName = '[' + scopeSelector + ']';
@ -455,8 +413,7 @@ export class ShadowCss {
return scoped;
}
/** @internal */
_insertPolyfillHostInCssText(selector: string): string {
private _insertPolyfillHostInCssText(selector: string): string {
selector = StringWrapper.replaceAll(selector, _colonHostContextRe, _polyfillHostContext);
selector = StringWrapper.replaceAll(selector, _colonHostRe, _polyfillHost);
return selector;
@ -493,34 +450,72 @@ var _polyfillHostRe = RegExpWrapper.create(_polyfillHost, 'im');
var _colonHostRe = /:host/gim;
var _colonHostContextRe = /:host-context/gim;
var _singleSelectorRe = /^(\s*)(@\S+)?(.*?)(\s*)$/g;
var _commentRe = /\/\*[\s\S]*?\*\//g;
var _curlyRe = /([{}])/g;
var OPEN_CURLY = '{';
var CLOSE_CURLY = '}';
export function splitCurlyBlocks(cssText:string):string[] {
var parts = StringWrapper.split(cssText, _curlyRe);
var result = [];
var bracketCount = 0;
var currentCurlyParts = [];
for (var partIndex = 0; partIndex<parts.length; partIndex++) {
var part = parts[partIndex];
currentCurlyParts.push(part);
if (part == OPEN_CURLY) {
bracketCount++;
} else if (part == CLOSE_CURLY) {
bracketCount--;
}
if (bracketCount === 0) {
result.push(currentCurlyParts.join(''));
currentCurlyParts = [];
}
}
result.push(currentCurlyParts.join(''));
if (result.length >= 2 && result[result.length-1] == '' && result[result.length-2] == '') {
result = result.slice(0, result.length-2);
}
return result;
function stripComments(input:string):string {
return StringWrapper.replaceAllMapped(input, _commentRe, (_) => '');
}
var _ruleRe = /(\s*)([^;\{\}]+?)(\s*)((?:{%BLOCK%}?\s*;?)|(?:\s*;))/g;
var _curlyRe = /([{}])/g;
const OPEN_CURLY = '{';
const CLOSE_CURLY = '}';
const BLOCK_PLACEHOLDER = '%BLOCK%';
export class CssRule {
constructor(public selector:string, public content:string) {}
}
export function processRules(input:string, ruleCallback:Function):string {
var inputWithEscapedBlocks = escapeBlocks(input);
var nextBlockIndex = 0;
return StringWrapper.replaceAllMapped(inputWithEscapedBlocks.escapedString, _ruleRe, function(m) {
var selector = m[2];
var content = '';
var suffix = m[4];
var contentPrefix = '';
if (isPresent(m[4]) && m[4].startsWith('{'+BLOCK_PLACEHOLDER)) {
content = inputWithEscapedBlocks.blocks[nextBlockIndex++];
suffix = m[4].substring(BLOCK_PLACEHOLDER.length+1);
contentPrefix = '{';
}
var rule = ruleCallback(new CssRule(selector, content));
return `${m[1]}${rule.selector}${m[3]}${contentPrefix}${rule.content}${suffix}`;
});
}
class StringWithEscapedBlocks {
constructor(public escapedString:string, public blocks:string[]) {}
}
function escapeBlocks(input:string):StringWithEscapedBlocks {
var inputParts = StringWrapper.split(input, _curlyRe);
var resultParts = [];
var escapedBlocks = [];
var bracketCount = 0;
var currentBlockParts = [];
for (var partIndex = 0; partIndex<inputParts.length; partIndex++) {
var part = inputParts[partIndex];
if (part == CLOSE_CURLY) {
bracketCount--;
}
if (bracketCount > 0) {
currentBlockParts.push(part);
} else {
if (currentBlockParts.length > 0) {
escapedBlocks.push(currentBlockParts.join(''));
resultParts.push(BLOCK_PLACEHOLDER);
currentBlockParts = [];
}
resultParts.push(part);
}
if (part == OPEN_CURLY) {
bracketCount++;
}
}
if (currentBlockParts.length > 0) {
escapedBlocks.push(currentBlockParts.join(''));
resultParts.push(BLOCK_PLACEHOLDER);
}
return new StringWithEscapedBlocks(resultParts.join(''), escapedBlocks);
}

68
modules/angular2/test/core/compiler/shadow_css_spec.ts
View File

@ -9,7 +9,7 @@ import {
el,
normalizeCSS
} from 'angular2/testing_internal';
import {ShadowCss, splitCurlyBlocks} from 'angular2/src/core/compiler/shadow_css';
import {ShadowCss, processRules, CssRule} from 'angular2/src/core/compiler/shadow_css';
import {RegExpWrapper, StringWrapper, isPresent} from 'angular2/src/core/facade/lang';
@ -43,9 +43,16 @@ export function main() {
expect(s(css, 'a')).toEqual(expected);
});
it('should support newlines in the selector and content ', () => {
var css = 'one, \ntwo {\ncolor: red;}';
var expected = 'one[a], two[a] {color:red;}';
expect(s(css, 'a')).toEqual(expected);
});
it('should handle media rules', () => {
var css = '@media screen and (max-width:800px) {div {font-size:50px;}}';
var expected = '@media screen and (max-width:800px) {div[a] {font-size:50px;}}';
var css = '@media screen and (max-width:800px, max-height:100%) {div {font-size:50px;}}';
var expected =
'@media screen and (max-width:800px, max-height:100%) {div[a] {font-size:50px;}}';
expect(s(css, 'a')).toEqual(expected);
});
@ -162,19 +169,58 @@ export function main() {
var css = s(styleStr, 'a');
expect(css).toEqual('div[a] {height:calc(100% - 55px);}');
});
it('should strip comments', () => { expect(s('/* x */b {c}', 'a')).toEqual('b[a] {c}'); });
it('should ignore special characters in comments',
() => { expect(s('/* {;, */b {c}', 'a')).toEqual('b[a] {c}'); });
it('should support multiline comments',
() => { expect(s('/* \n */b {c}', 'a')).toEqual('b[a] {c}'); });
});
describe('splitCurlyBlocks', () => {
it('should split empty css', () => { expect(splitCurlyBlocks('')).toEqual([]); });
describe('processRules', () => {
describe('parse rules', () => {
function captureRules(input: string): CssRule[] {
var result = [];
processRules(input, (cssRule) => {
result.push(cssRule);
return cssRule;
});
return result;
}
it('should split css rules without body',
() => { expect(splitCurlyBlocks('a')).toEqual(['a', '']); });
it('should work with empty css', () => { expect(captureRules('')).toEqual([]); });
it('should split css rules with body',
() => { expect(splitCurlyBlocks('a {b}')).toEqual(['a ', '{b}']); });
it('should capture a rule without body',
() => { expect(captureRules('a;')).toEqual([new CssRule('a', '')]); });
it('should split css rules with nested rules', () => {
expect(splitCurlyBlocks('a {b {c}} d {e}')).toEqual(['a ', '{b {c}}', ' d ', '{e}']);
it('should capture css rules with body',
() => { expect(captureRules('a {b}')).toEqual([new CssRule('a', 'b')]); });
it('should capture css rules with nested rules', () => {
expect(captureRules('a {b {c}} d {e}'))
.toEqual([new CssRule('a', 'b {c}'), new CssRule('d', 'e')]);
});
it('should capture mutiple rules where some have no body', () => {
expect(captureRules('@import a ; b {c}'))
.toEqual([new CssRule('@import a', ''), new CssRule('b', 'c')]);
});
});
describe('modify rules', () => {
it('should allow to change the selector while preserving whitespaces', () => {
expect(processRules('@import a; b {c {d}} e {f}',
(cssRule) => new CssRule(cssRule.selector + '2', cssRule.content)))
.toEqual('@import a2; b2 {c {d}} e2 {f}');
});
it('should allow to change the content', () => {
expect(processRules('a {b}',
(cssRule) => new CssRule(cssRule.selector, cssRule.content + '2')))
.toEqual('a {b2}');
});
});
});
}