Support for observable models, fixes #259

lib/src/emitters.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /** Collects several code emitters for the template tool. */
 library emitters;
 
 import 'dart:json' as json;
 
 import 'package:csslib/parser.dart' as css;
 import 'package:csslib/visitor.dart';
 import 'package:html5lib/dom.dart';
 import 'package:html5lib/dom_parsing.dart';
 import 'package:source_maps/span.dart' show Span, FixedLocation;
 
 import 'code_printer.dart';
 import 'codegen.dart' as codegen;
+import 'dart_parser.dart' show DartCodeInfo;
 import 'html5_utils.dart';
 import 'html5_setters.g.dart';
 import 'info.dart';
 import 'messages.dart';
 import 'utils.dart';
 
 /**
  * Context used by an emitter. Typically representing where to generate code
  * and additional information, such as total number of generated identifiers.
  */
@@ skipping 400 matching lines @@
     }
 
     visit(elemInfo);
 
     bool hasExtends = info.extendsComponent != null;
     var codeInfo = info.userCode;
     if (codeInfo == null) {
       var superclass = hasExtends ? info.extendsComponent.constructor
           : 'autogenerated.WebComponent';
       codeInfo = new DartCodeInfo(null, null, [],
-          'class ${info.constructor} extends $superclass {\n}');
+          'class ${info.constructor} extends $superclass {\n}', null);
     }
 
     var code = codeInfo.code;
-    var match = new RegExp('class ${info.constructor}[^{]*{').firstMatch(code);
+    var match = codeInfo.findClass(info.constructor);
     if (match != null) {
       var printer = new CodePrinter(0);
       var libraryName = (codeInfo.libraryName != null)
           ? codeInfo.libraryName
           : info.tagName.replaceAll(new RegExp('[-./]'), '_');
       var declaringPath = info.declaringFile.path;
       printer.addLine(codegen.header(declaringPath, libraryName));
 
-      // Add exisitng import, export, and part directives.
+      // Add existing import, export, and part directives.
       for (var directive in codeInfo.directives) {
-        printer.addLine(codegen.directiveText(directive, info, pathInfo));
+        // TODO(jmesserly): add span here
+        printer.addLine(directive.toString());
       }
 
       // Add imports only for those components used by this component.
       var imports = info.usedComponents.keys.map(
           (c) => pathInfo.relativePath(info, c));
 
       if (hasExtends) {
         // Inject an import to the base component.
         printer.addLine(codegen.importList(
             [pathInfo.relativePath(info, info.extendsComponent)]));
       }
 
       var cssClasses = json.stringify(
           computeCssClasses(info, scopedStyles: cssPolyfill));
       return printer
           ..add(codegen.importList(imports),
                 location: new FixedLocation(0, declaringPath.toString(), 0, 0))
           ..addLine('')
-          ..add(code.substring(0, match.end))
+          // TODO(jmesserly): add span here
+          ..add(code.substring(codeInfo.directivesEnd, match.leftBracket.end))
           ..add('\n')
           ..indent += 1
           ..addLine('/** Autogenerated from the template. */')
           ..addLine('')
           ..addLine('/** CSS class constants. */')
           ..addLine('static Map<String, String> _css = $cssClasses;')
           ..addLine('')
           ..addLine('/**')
           ..addLine(" * Shadow root for this component. We use 'var' to allow"
                     " simulating shadow DOM")
@@ skipping 25 matching lines @@
           ..addLine(_clearFields(_context.declarations))
           ..addLine('}')
           ..addLine('')
           ..addLine('void composeChildren() {')
           ..addLine('  super.composeChildren();')
           ..addLine('  if (_root is! autogenerated.ShadowRoot) _root = this;')
           ..addLine('}')
           ..addLine('')
           ..addLine('/** Original code from the component. */')
           ..indent -= 1
-          ..add(code.substring(match.end));
+          // TODO(jmesserly): add span here
+          ..add(code.substring(match.leftBracket.end));
+
     } else {
       messages.error('please provide a class definition '
           'for ${info.constructor}:\n $code', info.element.sourceSpan,
           file: info.inputPath);
       return null;
     }
   }
 }
 
 /** Generates the class corresponding to the main html page. */
 class MainPageEmitter extends RecursiveEmitter {
   MainPageEmitter(FileInfo fileInfo) : super(fileInfo, new Context(indent: 1));
 
   CodePrinter run(Document document, PathInfo pathInfo) {
     visit(_fileInfo.bodyInfo);
 
     // fix up the URLs to content that is not modified by the compiler
     document.queryAll('script').forEach((tag) {
-    var src = tag.attributes["src"];
-     if (tag.attributes['type'] == 'application/dart') {
-       tag.remove();
-     } else if (src != null) {
-       tag.attributes["src"] = pathInfo.transformUrl(_fileInfo.path, src);
-     }
+      var src = tag.attributes["src"];
+      if (tag.attributes['type'] == 'application/dart') {
+        tag.remove();
+      } else if (src != null) {
+        tag.attributes["src"] = pathInfo.transformUrl(_fileInfo.path, src);
+      }
     });
     document.queryAll('link').forEach((tag) {
-     var href = tag.attributes['href'];
-       if (tag.attributes['rel'] == 'components') {
-         tag.remove();
-       } else if (href != null) {
-         tag.attributes['href'] = pathInfo.transformUrl(_fileInfo.path, href);
-       }
-     });
+      var href = tag.attributes['href'];
+      if (tag.attributes['rel'] == 'components') {
+       tag.remove();
+      } else if (href != null) {
+       tag.attributes['href'] = pathInfo.transformUrl(_fileInfo.path, href);
+      }
+    });
 
     var printer = new CodePrinter(0);
 
     // Inject library name if not pressent.
     var codeInfo = _fileInfo.userCode;
     if (codeInfo == null) {
       codeInfo = new DartCodeInfo(null, null, [], 'main(){\n}');
     }
     var libraryName = codeInfo.libraryName != null
         ? codeInfo.libraryName : _fileInfo.libraryName;
     printer.add(codegen.header(_fileInfo.path, libraryName));
 
-    // Add exisitng import, export, and part directives.
+    // Add existing import, export, and part directives.
     for (var directive in codeInfo.directives) {
-      printer.addLine(codegen.directiveText(directive, _fileInfo, pathInfo));
+      // TODO(jmesserly): add span here
+      printer.addLine(directive.toString());
     }
 
     // Import only those components used by the page.
     var imports = _fileInfo.usedComponents.keys.map(
           (c) => pathInfo.relativePath(_fileInfo, c));
     return printer..add(codegen.importList(imports))
-           ..addLine('')
-           ..addLine('')
-           ..addLine('// Original code')
-           ..add(codeInfo.code)
-           ..addLine('')
-           ..addLine('// Additional generated code')
-           ..addLine('void init_autogenerated() {')
-           ..indent += 1
-           ..addLine('var _root = autogenerated.document.body;')
-           ..add(_context.declarations)
-           ..addLine('var __t = new autogenerated.Template(_root);')
-           ..add(_context.printer)
-           ..addLine('__t.create();')
-           ..addLine('__t..insert();')
-           ..indent -= 1
-           ..addLine('}');
+        ..addLine('')
+        ..addLine('')
+        ..addLine('// Original code')
+        // TODO(jmesserly): add span here
+        ..add(codeInfo.codeAfterDirectives())
+        ..addLine('')
+        ..addLine('// Additional generated code')
+        ..addLine('void init_autogenerated() {')
+        ..indent += 1
+        ..addLine('var _root = autogenerated.document.body;')
+        ..add(_context.declarations)
+        ..addLine('var __t = new autogenerated.Template(_root);')
+        ..add(_context.printer)
+        ..addLine('__t.create();')
+        ..addLine('__t..insert();')
+        ..indent -= 1
+        ..addLine('}');
   }
 }
 
+/** Emits a .dart file using the [DartCodeInfo]. */
+CodePrinter emitDartFile(FileInfo fileInfo, PathInfo pathInfo) {
+  var printer = new CodePrinter(0);
+
+  // Inject library name if not pressent.
+  var codeInfo = fileInfo.userCode;
+  var libraryName = codeInfo.libraryName;

[Siggi Cherem (dart-lang), 2013/02/13 01:43:24]

unused variable

[Jennifer Messerly, 2013/02/13 05:43:15]

Done. Also fixed "pressent" typo I had copied

+  printer.add(codegen.header(fileInfo.path, codeInfo.libraryName));
+
+  // Add existing import, export, and part directives.
+  // TODO(jmesserly): add spans here
+  for (var directive in codeInfo.directives) {
+    printer.addLine(directive.toString());
+  }
+  printer.add(codeInfo.codeAfterDirectives());
+  return printer;
+}
+
 /** Clears all fields in [declarations]. */
 String _clearFields(Declarations declarations) {
   if (declarations.declarations.isEmpty) return '';
   var buff = new StringBuffer();
   for (var d in declarations.declarations) {
     buff.add('${d.name} = ');
   }
   buff.add('null;');
   return buff.toString();
 }
@@ skipping 53 matching lines @@
     }
     typeName = htmlElementExtends[typeName];
   }
   // If we didn't find a DOM setter, and this is a component, set a property on
   // the component.
   if (info.component != null && !name.startsWith('data-')) {
     return 'xtag.${toCamelCase(name)}';
   }
   return "attributes['$name']";
 }