refactor: move angular source to /packages rather than modules/@angular

packages/compiler/src/template_parser/template_preparser.ts

@@ -0,0 +1,80 @@
+/**
+ * @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
+ */
+
+import * as html from '../ml_parser/ast';
+import {splitNsName} from '../ml_parser/tags';
+
+const NG_CONTENT_SELECT_ATTR = 'select';
+const NG_CONTENT_ELEMENT = 'ng-content';
+const LINK_ELEMENT = 'link';
+const LINK_STYLE_REL_ATTR = 'rel';
+const LINK_STYLE_HREF_ATTR = 'href';
+const LINK_STYLE_REL_VALUE = 'stylesheet';
+const STYLE_ELEMENT = 'style';
+const SCRIPT_ELEMENT = 'script';
+const NG_NON_BINDABLE_ATTR = 'ngNonBindable';
+const NG_PROJECT_AS = 'ngProjectAs';
+
+export function preparseElement(ast: html.Element): PreparsedElement {
+  let selectAttr: string = null;
+  let hrefAttr: string = null;
+  let relAttr: string = null;
+  let nonBindable = false;
+  let projectAs: string = null;
+  ast.attrs.forEach(attr => {
+    const lcAttrName = attr.name.toLowerCase();
+    if (lcAttrName == NG_CONTENT_SELECT_ATTR) {
+      selectAttr = attr.value;
+    } else if (lcAttrName == LINK_STYLE_HREF_ATTR) {
+      hrefAttr = attr.value;
+    } else if (lcAttrName == LINK_STYLE_REL_ATTR) {
+      relAttr = attr.value;
+    } else if (attr.name == NG_NON_BINDABLE_ATTR) {
+      nonBindable = true;
+    } else if (attr.name == NG_PROJECT_AS) {
+      if (attr.value.length > 0) {
+        projectAs = attr.value;
+      }
+    }
+  });
+  selectAttr = normalizeNgContentSelect(selectAttr);
+  const nodeName = ast.name.toLowerCase();
+  let type = PreparsedElementType.OTHER;
+  if (splitNsName(nodeName)[1] == NG_CONTENT_ELEMENT) {
+    type = PreparsedElementType.NG_CONTENT;
+  } else if (nodeName == STYLE_ELEMENT) {
+    type = PreparsedElementType.STYLE;
+  } else if (nodeName == SCRIPT_ELEMENT) {
+    type = PreparsedElementType.SCRIPT;
+  } else if (nodeName == LINK_ELEMENT && relAttr == LINK_STYLE_REL_VALUE) {
+    type = PreparsedElementType.STYLESHEET;
+  }
+  return new PreparsedElement(type, selectAttr, hrefAttr, nonBindable, projectAs);
+}
+
+export enum PreparsedElementType {
+  NG_CONTENT,
+  STYLE,
+  STYLESHEET,
+  SCRIPT,
+  OTHER
+}
+
+export class PreparsedElement {
+  constructor(
+      public type: PreparsedElementType, public selectAttr: string, public hrefAttr: string,
+      public nonBindable: boolean, public projectAs: string) {}
+}
+
+
+function normalizeNgContentSelect(selectAttr: string): string {
+  if (selectAttr === null || selectAttr.length === 0) {
+    return '*';
+  }
+  return selectAttr;
+}