Add measurements and send-metrics to dart2js's info.

bin/inference/client.dart

Index: bin/inference/client.dart
diff --git a/bin/inference/client.dart b/bin/inference/client.dart
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+// Copyright (c) 2015, 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.
+
+/// Client component to display [GlobalResult]s as a web app.
+library dart2js_info.bin.inference.client;
+
+import 'dart:html' hide Entry;
+import 'dart:convert';
+import 'package:dart2js_info/info.dart';
+import 'package:dart2js_info/src/string_edit_buffer.dart';
+import 'package:charcode/charcode.dart';
+
+AllInfo data;
+main() async {
+  data =
+      AllInfo.parseFromJson(JSON.decode(await HttpRequest.getString('/data')));
+
+  routeByHash();
+  window.onHashChange.listen((_) => routeByHash());
+}
+
+/// Does basic routing for the client UI.
+routeByHash() {
+  var hash = window.location.hash;
+  if (hash.isEmpty || hash == '#' || hash == '#!') {
+    handleHomePage();
+  } else if (hash.startsWith('#!')) {
+    handleFileView(hash.substring(2));
+  }
+}
+
+/// Renders the home screen: a list of files with results.
+handleHomePage() {
+  var files = UrlRetriever.run(data);
+  var html = new StringBuffer()..write('<ul>');
+  for (var file in files) {
+    html.write('<li> <a href="#!$file">$file</a></li>');
+  }
+  html.write('</ul>');
+  document.body.setInnerHtml('$html', treeSanitizer: NodeTreeSanitizer.trusted);
+}
+
+/// Renders the results of a single file: the code with highlighting for each
+/// send.
+handleFileView(String path) async {
+  var contents = await HttpRequest.getString('file/$path');
+  var visitor = new SendHighlighter(path, contents);
+  data.accept(visitor);
+  var code = '${visitor.code}';
+  document.body.setInnerHtml(
+      '''
+      <div class="grid">
+        <div class="main code">$code</div>
+        <div id="selections" class="right code"></div>
+      </div>
+      ''',
+      treeSanitizer: NodeTreeSanitizer.trusted);
+
+  var div = document.querySelector('#selections');
+  visitAllMetrics((metric, _) {
+    if (metric is GroupedMetric || metric.name == 'reachable functions') return;
+    var cssClassName = _classNameForMetric(metric);
+    var node = new Element.html('<div>'
+        '<span class="send $cssClassName inactive">${metric.name}</span>'
+        '</div>');
+    node.children[0].onClick.listen((_) {
+      document.querySelectorAll('.$cssClassName').classes.toggle('inactive');
+    });
+    div.append(node);
+  });
+}
+
+/// Extracts urls for all files mentioned in the results.
+class UrlRetriever extends RecursiveInfoVisitor {
+  List<String> _paths = [];
+
+  static List<String> run(AllInfo results) {
+    var visitor = new UrlRetriever();
+    results.accept(visitor);
+    return visitor._paths;
+  }
+
+  @override
+  visitLibrary(LibraryInfo info) {
+    _paths.add(info.uri.path);
+    super.visitLibrary(info);
+  }
+
+  @override
+  visitFunction(FunctionInfo info) {
+    var path = info.measurements?.uri?.path;
+    if (path != null) _paths.add(path);
+  }
+}
+
+/// Visitors that highlights every send in the text of a file using HTML
+/// `<span>` tags.
+class SendHighlighter extends RecursiveInfoVisitor {
+  final String path;
+  final StringEditBuffer code;
+
+  SendHighlighter(this.path, String contents)
+      : code = new StringEditBuffer(contents) {
+    code.insert(0, '<span class="line">');
+    for (int i = 0; i < contents.length; i++) {
+      if (contents.codeUnitAt(i) == $lt) {
+        code.replace(i, i + 1, '&lt;');
+      } else if (contents.codeUnitAt(i) == $gt) {
+        code.replace(i, i + 1, '&gt;');
+      } else if (contents.codeUnitAt(i) == $lf) {
+        code.insert(i + 1, '</span><span class="line">');
+      }
+    }
+    code.insert(contents.length, '</span>');
+  }
+
+  @override
+  visitFunction(FunctionInfo function) {
+    if (function.measurements?.uri?.path != path) return;
+    var entries = function.measurements.entries;
+    for (var metric in entries.keys) {
+      if (metric is GroupedMetric) continue;
+      var cssClassName = _classNameForMetric(metric);
+      for (var entry in entries[metric]) {
+        code.insert(entry.begin, '<span class="send ${cssClassName} inactive">',
+            -entry.end);
+        code.insert(entry.end, '</span>');
+      }
+    }
+  }
+}
+
+_classNameForMetric(Metric metric) => metric.name.replaceAll(' ', '-');