Move leap to lib/compiler/samples.

samples/leap/leap_leg.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.
-
-compilerIsolate(port) {
-  Runner runner = new Runner();
-  runner.init();
-
-  port.receive((msg, replyTo) {
-    replyTo.send(runner.update(msg));
-  });
-}
-
-main() {
-  html.document.query('#status').innerHTML = 'Initializing...';
-  setOutline(msg) {
-    html.document.query('#out').innerHTML = msg;
-  }
-  final codeDiv = html.document.query('#code');
-  final popup = html.document.query('#popup');
-
-  // The port for communicating with the compiler isolate.
-  var port = null;
-
-  // Should be called when [codeDiv] has changed. For now, call it always
-  // on mouse up and key up events.
-  update() {
-    if (port === null) return;
-    port.call(codeDiv.text).then(setOutline);
-  }
-
-  hide(Element e) {
-    e.style.visibility = 'hidden';
-  }
-
-  show(Element e) {
-    e.style.visibility = 'visible';
-  }
-
-  insertTextAtPoint(Event e, String newText) {
-    e.preventDefault();
-    var selection = html.window.getSelection();
-    var range = selection.getRangeAt(0);
-    var offset = range.startOffset;
-    Text text = codeDiv.nodes[0];
-    text.insertData(offset, newText);
-    selection.setPosition(text, offset + newText.length);
-  }
-
-  // This prevents creating a new div element when hitting enter.
-  codeDiv.on.keyPress.add((Event e) {
-    if (e.keyIdentifier == 'Enter') {
-      // TODO(ahe): Is 'Enter' portable?
-      insertTextAtPoint(e, '\n');
-    }
-  });
-
-  // Override tab key.
-  codeDiv.on.keyDown.add((Event e) {
-    if (e.keyIdentifier == 'U+0009') {
-      // TODO(ahe): Find better way to detect tab key.
-      insertTextAtPoint(e, '  ');
-    }
-  });
-
-  // Called on keyUp and mouseUp to display a marker at the current
-  // insertion point (the selection's first range). This probably
-  // needs more work before it works really well, but seems to be good
-  // enough for now.
-  handleUp(Event e) {
-    var selection = html.window.getSelection();
-    var range = selection.getRangeAt(0);
-    var rects = range.getClientRects();
-    if (rects.length < 1) {
-      hide(popup);
-      return;
-    }
-    html.ClientRect rect = rects.item(rects.length - 1);
-    if (rect.width.toInt() != 0) {
-      // This is a selection of multiple characters, not a single
-      // point of insertion.
-      hide(popup);
-      return;
-    }
-    popup.style.top = "${rect.bottom.toInt()}px";
-    popup.style.left = "${rect.right.toInt()}px";
-    // Instead of displaying this immediately, we could set up a timer
-    // event and display it later. This is a matter of getting the UX
-    // just right, for now it simply demonstrates that we know where
-    // the insertion point is (in pixels) and what the character
-    // offset is.
-    show(popup);
-    popup.text = '''Code completion here...
-Current character offset: ${range.startOffset}''';
-    // TODO(ahe): Better detection of when [codeDiv] has changed.
-    update();
-  }
-
-  codeDiv.on.keyUp.add(handleUp);
-  codeDiv.on.mouseUp.add(handleUp);
-
-  codeDiv.on.blur.add((Event e) => hide(popup));
-
-  // The event handlers are now set up. Allow editing.
-  codeDiv.contentEditable = "true";
-
-  // Creates a compiler isolate in its own iframe. This should prevent
-  // the compiler from blocking the UI.
-  spawnDomIsolate(html.document.query('#isolate').contentWindow,
-                       'compilerIsolate').then((sendPort) {
-    // The compiler isolate is now ready to talk. Store the port so
-    // that the update function starts requesting outlines whenever
-    // [codeDiv] changes.
-    port = sendPort;
-    // Make sure that we get an initial outline.
-    update();
-    html.document.query('#status').innerHTML = 'Ready';
-  });
-}
-
-class Runner {
-  final LeapCompiler compiler;
-
-  Runner() : compiler = new LeapCompiler();
-
-  String init() {
-    Stopwatch sw = new Stopwatch()..start();
-    compiler.scanBuiltinLibraries();
-    sw.stop();
-    return 'Scanned core libraries in ${sw.elapsedInMs()}ms';
-  }
-
-  String update(String codeText) {
-    StringBuffer sb = new StringBuffer();
-
-    Stopwatch sw = new Stopwatch()..start();
-
-    LibraryElement e = compile(new LeapScript(codeText));
-
-    void printFunction(FunctionElement fe, [String indentation = ""]) {
-      var paramAcc = [];
-
-      FunctionType ft = fe.computeType(compiler);
-
-      sb.add("<div>${indentation}");
-      ft.returnType.name.printOn(sb);
-      sb.add(" ");
-      fe.name.printOn(sb);
-      sb.add("(");
-      ft.parameterTypes.printOn(sb, ", ");
-      sb.add(");</div>");
-
-    }
-
-    void printField(FieldElement fe, [String indentation = ""]) {
-      sb.add("<div>${indentation}var ");
-      fe.name.printOn(sb);
-      sb.add(";</div>");
-    }
-
-    void printClass(ClassElement ce) {
-      ce.parseNode(compiler);
-
-      sb.add("<div>class ");
-      ce.name.printOn(sb);
-      sb.add(" {");
-
-      for (Element e in ce.members.reverse()) {
-        switch(e.kind) {
-        case ElementKind.FUNCTION:
-
-          printFunction(e, "&nbsp; ");
-          break;
-
-        case ElementKind.FIELD:
-
-          printField(e, "&nbsp; ");
-          break;
-        }
-      }
-      sb.add("}</div>");
-    }
-
-    for (Element c in e.topLevelElements.reverse()) {
-      switch (c.kind) {
-      case ElementKind.FUNCTION:
-        printFunction (c);
-        break;
-
-      case ElementKind.CLASS:
-        printClass(c);
-        break;
-
-      case ElementKind.FIELD:
-        printField (c);
-        break;
-      }
-    }
-
-    compiler.log("Outline ${sw.elapsedInMs()}");
-    return sb.toString();
-  }
-
-  Element compile(String script) {
-    return compiler.runSelective(script);
-  }
-}
-
-class LeapCompiler extends Compiler {
-  HttpRequestCache cache;
-
-  final bool throwOnError = false;
-
-  final libDir = "../..";
-
-  LeapCompiler() : cache = new HttpRequestCache(), super() {
-    tasks = [scanner, dietParser, parser, resolver, checker];
-  }
-
-  void log(message) { print(message); }
-
-  String get legDirectory => libDir;
-
-  LibraryElement scanBuiltinLibrary(String path) {
-    Uri base = new Uri.fromString(html.window.location.toString());
-    Uri libraryRoot = base.resolve(libDir);
-    Uri resolved = libraryRoot.resolve(DART2JS_LIBRARY_MAP[path]);
-    LibraryElement library = scanner.loadLibrary(resolved, null);
-    return library;
-  }
-
-  currentScript() {
-    if (currentElement === null) return null;
-    CompilationUnitElement compilationUnit =
-      currentElement.getCompilationUnit();
-    if (compilationUnit === null) return null;
-    return compilationUnit.script;
-  }
-
-  Script readScript(Uri uri, [ScriptTag node]) {
-    String text = "";
-    try {
-      text = cache.readAll(uri.path.toString());
-    } catch (exception) {
-      cancel("${uri.path}: $exception", node: node);
-    }
-    SourceFile sourceFile = new SourceFile(uri.toString(), text);
-    return new Script(uri, sourceFile);
-  }
-
-  reportWarning(Node node, var message) {
-    print(message);
-  }
-
-  reportError(Node node, var message) {
-    cancel(message.toString(), node);
-  }
-
-  void cancel([String reason, Node node, token, instruction, element]) {
-    print(reason);
-  }
-
-  Element runSelective(Script script) {
-    Stopwatch sw = new Stopwatch()..start();
-    Element e;
-    try {
-      e = runCompilerSelective(script);
-    } on CompilerCancelledException catch (exception) {
-      log(exception.toString());
-      log('compilation failed');
-      return null;
-    }
-    log('compilation succeeded: ${sw.elapsedInMs()}ms');
-    return e;
-  }
-
-  LibraryElement runCompilerSelective(Script script) {
-    mainApp = new LibraryElement(script);
-
-    universe.libraries.remove(script.uri.toString());
-    Element element;
-    withCurrentElement(mainApp, () {
-        scanner.scan(mainApp);
-      });
-    return mainApp;
-  }
-}