@angular/compiler
Version:
Angular - the compiler library
78 lines • 10.9 kB
JavaScript
/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
class _Visitor {
visitTag(tag) {
const strAttrs = this._serializeAttributes(tag.attrs);
if (tag.children.length == 0) {
return `<${tag.name}${strAttrs}/>`;
}
const strChildren = tag.children.map(node => node.visit(this));
return `<${tag.name}${strAttrs}>${strChildren.join('')}</${tag.name}>`;
}
visitText(text) { return text.value; }
visitDeclaration(decl) {
return `<?xml${this._serializeAttributes(decl.attrs)} ?>`;
}
_serializeAttributes(attrs) {
const strAttrs = Object.keys(attrs).map((name) => `${name}="${attrs[name]}"`).join(' ');
return strAttrs.length > 0 ? ' ' + strAttrs : '';
}
visitDoctype(doctype) {
return `<!DOCTYPE ${doctype.rootTag} [\n${doctype.dtd}\n]>`;
}
}
const _visitor = new _Visitor();
export function serialize(nodes) {
return nodes.map((node) => node.visit(_visitor)).join('');
}
export class Declaration {
constructor(unescapedAttrs) {
this.attrs = {};
Object.keys(unescapedAttrs).forEach((k) => {
this.attrs[k] = escapeXml(unescapedAttrs[k]);
});
}
visit(visitor) { return visitor.visitDeclaration(this); }
}
export class Doctype {
constructor(rootTag, dtd) {
this.rootTag = rootTag;
this.dtd = dtd;
}
visit(visitor) { return visitor.visitDoctype(this); }
}
export class Tag {
constructor(name, unescapedAttrs = {}, children = []) {
this.name = name;
this.children = children;
this.attrs = {};
Object.keys(unescapedAttrs).forEach((k) => {
this.attrs[k] = escapeXml(unescapedAttrs[k]);
});
}
visit(visitor) { return visitor.visitTag(this); }
}
export class Text {
constructor(unescapedValue) { this.value = escapeXml(unescapedValue); }
visit(visitor) { return visitor.visitText(this); }
}
export class CR extends Text {
constructor(ws = 0) { super(`\n${new Array(ws + 1).join(' ')}`); }
}
const _ESCAPED_CHARS = [
[/&/g, '&'],
[/"/g, '"'],
[/'/g, '''],
[/</g, '<'],
[/>/g, '>'],
];
// Escape `_ESCAPED_CHARS` characters in the given text with encoded entities
export function escapeXml(text) {
return _ESCAPED_CHARS.reduce((text, entry) => text.replace(entry[0], entry[1]), text);
}
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All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport interface IVisitor {\n  visitTag(tag: Tag): any;\n  visitText(text: Text): any;\n  visitDeclaration(decl: Declaration): any;\n  visitDoctype(doctype: Doctype): any;\n}\n\nclass _Visitor implements IVisitor {\n  visitTag(tag: Tag): string {\n    const strAttrs = this._serializeAttributes(tag.attrs);\n\n    if (tag.children.length == 0) {\n      return `<${tag.name}${strAttrs}/>`;\n    }\n\n    const strChildren = tag.children.map(node => node.visit(this));\n    return `<${tag.name}${strAttrs}>${strChildren.join('')}</${tag.name}>`;\n  }\n\n  visitText(text: Text): string { return text.value; }\n\n  visitDeclaration(decl: Declaration): string {\n    return `<?xml${this._serializeAttributes(decl.attrs)} ?>`;\n  }\n\n  private _serializeAttributes(attrs: {[k: string]: string}) {\n    const strAttrs = Object.keys(attrs).map((name: string) => `${name}=\"${attrs[name]}\"`).join(' ');\n    return strAttrs.length > 0 ? ' ' + strAttrs : '';\n  }\n\n  visitDoctype(doctype: Doctype): any {\n    return `<!DOCTYPE ${doctype.rootTag} [\\n${doctype.dtd}\\n]>`;\n  }\n}\n\nconst _visitor = new _Visitor();\n\nexport function serialize(nodes: Node[]): string {\n  return nodes.map((node: Node): string => node.visit(_visitor)).join('');\n}\n\nexport interface Node { visit(visitor: IVisitor): any; }\n\nexport class Declaration implements Node {\n  public attrs: {[k: string]: string} = {};\n\n  constructor(unescapedAttrs: {[k: string]: string}) {\n    Object.keys(unescapedAttrs).forEach((k: string) => {\n      this.attrs[k] = escapeXml(unescapedAttrs[k]);\n    });\n  }\n\n  visit(visitor: IVisitor): any { return visitor.visitDeclaration(this); }\n}\n\nexport class Doctype implements Node {\n  constructor(public rootTag: string, public dtd: string) {}\n\n  visit(visitor: IVisitor): any { return visitor.visitDoctype(this); }\n}\n\nexport class Tag implements Node {\n  public attrs: {[k: string]: string} = {};\n\n  constructor(\n      public name: string, unescapedAttrs: {[k: string]: string} = {},\n      public children: Node[] = []) {\n    Object.keys(unescapedAttrs).forEach((k: string) => {\n      this.attrs[k] = escapeXml(unescapedAttrs[k]);\n    });\n  }\n\n  visit(visitor: IVisitor): any { return visitor.visitTag(this); }\n}\n\nexport class Text implements Node {\n  value: string;\n  constructor(unescapedValue: string) { this.value = escapeXml(unescapedValue); }\n\n  visit(visitor: IVisitor): any { return visitor.visitText(this); }\n}\n\nexport class CR extends Text {\n  constructor(ws: number = 0) { super(`\\n${new Array(ws + 1).join(' ')}`); }\n}\n\nconst _ESCAPED_CHARS: [RegExp, string][] = [\n  [/&/g, '&amp;'],\n  [/\"/g, '&quot;'],\n  [/'/g, '&apos;'],\n  [/</g, '&lt;'],\n  [/>/g, '&gt;'],\n];\n\n// Escape `_ESCAPED_CHARS` characters in the given text with encoded entities\nexport function escapeXml(text: string): string {\n  return _ESCAPED_CHARS.reduce(\n      (text: string, entry: [RegExp, string]) => text.replace(entry[0], entry[1]), text);\n}\n"]}