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feat(compiler): add stylesheet compiler
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| import {DirectiveMetadata, SourceModule, ViewEncapsulation} from './api'; | ||
| import {XHR} from 'angular2/src/core/render/xhr'; | ||
| import {StringWrapper, isJsObject, isBlank} from 'angular2/src/core/facade/lang'; | ||
| import {PromiseWrapper, Promise} from 'angular2/src/core/facade/async'; | ||
| import {ShadowCss} from 'angular2/src/core/render/dom/compiler/shadow_css'; | ||
| import {UrlResolver} from 'angular2/src/core/services/url_resolver'; | ||
| import {resolveStyleUrls} from './style_url_resolver'; | ||
|
|
||
| const COMPONENT_VARIABLE = '%COMP%'; | ||
| var COMPONENT_REGEX = /%COMP%/g; | ||
| const HOST_ATTR = `_nghost-${COMPONENT_VARIABLE}`; | ||
| const CONTENT_ATTR = `_ngcontent-${COMPONENT_VARIABLE}`; | ||
| var ESCAPE_STRING_RE = /'|\\|\n/g; | ||
| var IS_DART = !isJsObject({}); | ||
|
|
||
| export class StyleCompiler { | ||
| private _styleCache: Map<string, Promise<string[]>> = new Map<string, Promise<string[]>>(); | ||
| private _shadowCss: ShadowCss = new ShadowCss(); | ||
|
|
||
| constructor(private _xhr: XHR, private _urlResolver: UrlResolver) {} | ||
|
|
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| compileComponentRuntime(component: DirectiveMetadata): Promise<string[]> { | ||
| var styles = component.template.styles; | ||
| var styleAbsUrls = component.template.styleAbsUrls; | ||
| return this._loadStyles(styles, styleAbsUrls, | ||
| component.template.encapsulation === ViewEncapsulation.Emulated) | ||
| .then(styles => styles.map(style => StringWrapper.replaceAll(style, COMPONENT_REGEX, | ||
| `${component.type.id}`))); | ||
| } | ||
|
|
||
| compileComponentCodeGen(component: DirectiveMetadata): SourceModule { | ||
| var shim = component.template.encapsulation === ViewEncapsulation.Emulated; | ||
| var suffix; | ||
| if (shim) { | ||
| var componentId = `${ component.type.id}`; | ||
| suffix = | ||
| codeGenMapArray(['style'], `style${codeGenReplaceAll(COMPONENT_VARIABLE, componentId)}`); | ||
| } else { | ||
| suffix = ''; | ||
| } | ||
| return this._styleCodeGen(`$component.type.typeUrl}.styles`, component.template.styles, | ||
| component.template.styleAbsUrls, shim, suffix); | ||
| } | ||
|
|
||
| compileStylesheetCodeGen(moduleName: string, cssText: string): SourceModule[] { | ||
| var styleWithImports = resolveStyleUrls(this._urlResolver, moduleName, cssText); | ||
| return [ | ||
| this._styleCodeGen(moduleName, [styleWithImports.style], styleWithImports.styleUrls, false, | ||
| ''), | ||
| this._styleCodeGen(moduleName, [styleWithImports.style], styleWithImports.styleUrls, true, '') | ||
| ]; | ||
| } | ||
|
|
||
| private _loadStyles(plainStyles: string[], absUrls: string[], | ||
| encapsulate: boolean): Promise<string[]> { | ||
| var promises = absUrls.map((absUrl) => { | ||
| var cacheKey = `${absUrl}${encapsulate ? '.shim' : ''}`; | ||
| var result = this._styleCache.get(cacheKey); | ||
| if (isBlank(result)) { | ||
| result = this._xhr.get(absUrl).then((style) => { | ||
| var styleWithImports = resolveStyleUrls(this._urlResolver, absUrl, style); | ||
| return this._loadStyles([styleWithImports.style], styleWithImports.styleUrls, | ||
| encapsulate); | ||
| }); | ||
| this._styleCache.set(cacheKey, result); | ||
| } | ||
| return result; | ||
| }); | ||
| return PromiseWrapper.all(promises).then((nestedStyles: string[][]) => { | ||
| var result = plainStyles.map(plainStyle => this._shimIfNeeded(plainStyle, encapsulate)); | ||
| nestedStyles.forEach(styles => styles.forEach(style => result.push(style))); | ||
| return result; | ||
| }); | ||
| } | ||
|
|
||
| private _styleCodeGen(moduleName: string, plainStyles: string[], absUrls: string[], shim: boolean, | ||
| suffix: string): SourceModule { | ||
| var imports: string[][] = []; | ||
| var moduleSource = `${codeGenExportVar('STYLES')} (`; | ||
| moduleSource += | ||
| `[${plainStyles.map( plainStyle => escapeString(this._shimIfNeeded(plainStyle, shim)) ).join(',')}]`; | ||
| for (var i = 0; i < absUrls.length; i++) { | ||
| var url = absUrls[i]; | ||
| var moduleAlias = `import${i}`; | ||
| imports.push([this._shimModuleName(url, shim), moduleAlias]); | ||
| moduleSource += `${codeGenConcatArray(moduleAlias+'.STYLES')}`; | ||
| } | ||
| moduleSource += `)${suffix};`; | ||
| return new SourceModule(this._shimModuleName(moduleName, shim), moduleSource, imports); | ||
| } | ||
|
|
||
| private _shimIfNeeded(style: string, shim: boolean): string { | ||
| return shim ? this._shadowCss.shimCssText(style, CONTENT_ATTR, HOST_ATTR) : style; | ||
| } | ||
|
|
||
| private _shimModuleName(originalUrl: string, shim: boolean): string { | ||
| return shim ? `${originalUrl}.shim` : originalUrl; | ||
| } | ||
| } | ||
|
|
||
| function escapeString(input: string): string { | ||
| var escapedInput = StringWrapper.replaceAllMapped(input, ESCAPE_STRING_RE, (match) => { | ||
| if (match[0] == "'" || match[0] == '\\') { | ||
| return `\\${match[0]}`; | ||
| } else { | ||
| return '\\n'; | ||
| } | ||
| }); | ||
| return `'${escapedInput}'`; | ||
| } | ||
|
|
||
| function codeGenExportVar(name: string): string { | ||
| if (IS_DART) { | ||
| return `var ${name} =`; | ||
| } else { | ||
| return `var ${name} = exports.${name} =`; | ||
| } | ||
| } | ||
|
|
||
| function codeGenConcatArray(expression: string): string { | ||
| return `${IS_DART ? '..addAll' : '.concat'}(${expression})`; | ||
| } | ||
|
|
||
| function codeGenMapArray(argNames: string[], callback: string): string { | ||
| if (IS_DART) { | ||
| return `.map( (${argNames.join(',')}) => ${callback} ).toList()`; | ||
| } else { | ||
| return `.map(function(${argNames.join(',')}) { return ${callback}; })`; | ||
| } | ||
| } | ||
|
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||
| function codeGenReplaceAll(pattern: string, value: string): string { | ||
| if (IS_DART) { | ||
| return `.replaceAll('${pattern}', '${value}')`; | ||
| } else { | ||
| return `.replace(/${pattern}/g, '${value}')`; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,65 +1,52 @@ | ||
| // Some of the code comes from WebComponents.JS | ||
| // https://github.com/webcomponents/webcomponentsjs/blob/master/src/HTMLImports/path.js | ||
|
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| import {Injectable} from 'angular2/di'; | ||
| import {RegExp, RegExpWrapper, StringWrapper} from 'angular2/src/core/facade/lang'; | ||
| import {RegExp, RegExpWrapper, StringWrapper, isPresent} from 'angular2/src/core/facade/lang'; | ||
| import {UrlResolver} from 'angular2/src/core/services/url_resolver'; | ||
|
|
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| /** | ||
| * Rewrites URLs by resolving '@import' and 'url()' URLs from the given base URL, | ||
| * removes and returns the @import urls | ||
| */ | ||
| @Injectable() | ||
| export class StyleUrlResolver { | ||
| constructor(public _resolver: UrlResolver) {} | ||
|
|
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| resolveUrls(cssText: string, baseUrl: string): string { | ||
| cssText = this._replaceUrls(cssText, _cssUrlRe, baseUrl); | ||
| return cssText; | ||
| } | ||
|
|
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| extractImports(cssText: string): StyleWithImports { | ||
| var foundUrls = []; | ||
| cssText = this._extractUrls(cssText, _cssImportRe, foundUrls); | ||
| return new StyleWithImports(cssText, foundUrls); | ||
| } | ||
|
|
||
| _replaceUrls(cssText: string, re: RegExp, baseUrl: string) { | ||
| return StringWrapper.replaceAllMapped(cssText, re, (m) => { | ||
| var pre = m[1]; | ||
| var originalUrl = m[2]; | ||
| if (RegExpWrapper.test(_dataUrlRe, originalUrl)) { | ||
| // Do not attempt to resolve data: URLs | ||
| return m[0]; | ||
| } | ||
| var url = StringWrapper.replaceAll(originalUrl, _quoteRe, ''); | ||
| var post = m[3]; | ||
|
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| var resolvedUrl = this._resolver.resolve(baseUrl, url); | ||
|
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| return pre + "'" + resolvedUrl + "'" + post; | ||
| }); | ||
| } | ||
|
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| _extractUrls(cssText: string, re: RegExp, foundUrls: string[]) { | ||
| return StringWrapper.replaceAllMapped(cssText, re, (m) => { | ||
| var originalUrl = m[2]; | ||
| if (RegExpWrapper.test(_dataUrlRe, originalUrl)) { | ||
| // Do not attempt to resolve data: URLs | ||
| return m[0]; | ||
| } | ||
| var url = StringWrapper.replaceAll(originalUrl, _quoteRe, ''); | ||
| foundUrls.push(url); | ||
| return ''; | ||
| }); | ||
| } | ||
| export function resolveStyleUrls(resolver: UrlResolver, baseUrl: string, cssText: string): | ||
| StyleWithImports { | ||
| var foundUrls = []; | ||
| cssText = extractUrls(resolver, baseUrl, cssText, foundUrls); | ||
| cssText = replaceUrls(resolver, baseUrl, cssText); | ||
| return new StyleWithImports(cssText, foundUrls); | ||
| } | ||
|
|
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| export class StyleWithImports { | ||
| constructor(public style: string, public styleUrls: string[]) {} | ||
| } | ||
|
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| function extractUrls(resolver: UrlResolver, baseUrl: string, cssText: string, foundUrls: string[]): | ||
| string { | ||
| return StringWrapper.replaceAllMapped(cssText, _cssImportRe, (m) => { | ||
| var url = isPresent(m[1]) ? m[1] : m[2]; | ||
| foundUrls.push(resolver.resolve(baseUrl, url)); | ||
| return ''; | ||
| }); | ||
| } | ||
|
|
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| function replaceUrls(resolver: UrlResolver, baseUrl: string, cssText: string): string { | ||
| return StringWrapper.replaceAllMapped(cssText, _cssUrlRe, (m) => { | ||
| var pre = m[1]; | ||
| var originalUrl = m[2]; | ||
| if (RegExpWrapper.test(_dataUrlRe, originalUrl)) { | ||
| // Do not attempt to resolve data: URLs | ||
| return m[0]; | ||
| } | ||
| var url = StringWrapper.replaceAll(originalUrl, _quoteRe, ''); | ||
| var post = m[3]; | ||
|
|
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| var resolvedUrl = resolver.resolve(baseUrl, url); | ||
|
|
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| return pre + "'" + resolvedUrl + "'" + post; | ||
| }); | ||
| } | ||
|
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| var _cssUrlRe = /(url\()([^)]*)(\))/g; | ||
| var _cssImportRe = /(@import[\s]+(?:url\()?)['"]?([^'"\)]*)['"]?(.*;)/g; | ||
| var _cssImportRe = /@import\s+(?:url\()?\s*(?:(?:['"]([^'"]*))|([^;\)\s]*))[^;]*;?/g; | ||
| var _quoteRe = /['"]/g; | ||
| var _dataUrlRe = /^['"]?data:/g; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,2 @@ | ||
| // used by style_compiler_spec.ts | ||
| export var STYLES = ['span[_ngcontent-%COMP%] {\ncolor: blue;\n}']; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,2 @@ | ||
| // used by style_compiler_spec.ts | ||
| export var STYLES = ['span {color: blue}']; |
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