dart2js send stats, includes:

pkg/compiler/tool/stats/client.dart

+// 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 compiler.tool.stats.client;
+
+import 'dart:html' hide Entry;
+import 'dart:convert';
+import 'package:compiler/src/stats/stats.dart';
+import 'package:charcode/charcode.dart';
+
+GlobalResult data;
+main() async {
+  data = GlobalResult.fromJson(
+      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 RecursiveResultVisitor {
+  List<String> _paths = [];
+
+  static List<String> run(GlobalResult results) {
+    var visitor = new UrlRetriever();
+    results.accept(visitor);
+    return visitor._paths;
+  }
+
+  @override
+  visitCompilationUnit(CompilationUnitResult unit) {
+    _paths.add(unit.uri.path);
+  }
+
+  @override
+  visitFunction(FunctionResult function) {}
+}
+
+/// Visitors that highlights every send in the text of a file using HTML
+/// `<span>` tags.
+class SendHighlighter extends RecursiveResultVisitor {
+  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
+  visitCompilationUnit(CompilationUnitResult unit) {
+    // TODO(sigmund): change results to store a map from Uri to file results.
+    if (path != unit.uri.path) return;
+    super.visitCompilationUnit(unit);
+  }
+
+  @override
+  visitFunction(FunctionResult function) {
+    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(' ', '-');
+
+/// A buffer meant to apply edits on a string (rather than building a string
+/// from scratch). Each change is described using the location information on
+/// the original string. Internally this buffer keeps track of how a
+/// modification in one portion can offset a modification further down the
+/// string.
+class StringEditBuffer {
+  final String original;
+  final _edits = <_StringEdit>[];
+
+  StringEditBuffer(this.original);
+
+  bool get hasEdits => _edits.length > 0;
+
+  /// Edit the original text, replacing text on the range [begin] and
+  /// exclusive [end] with the [replacement] string.
+  void replace(int begin, int end, String replacement, [int sortId]) {
+    _edits.add(new _StringEdit(begin, end, replacement, sortId));
+  }
+
+  /// Insert [string] at [offset].
+  /// Equivalent to `replace(offset, offset, string)`.
+  void insert(int offset, String string, [sortId]) =>
+    replace(offset, offset, string, sortId);
+
+  /// Remove text from the range [begin] to exclusive [end].
+  /// Equivalent to `replace(begin, end, '')`.
+  void remove(int begin, int end) => replace(begin, end, '');
+
+  /// Applies all pending [edit]s and returns a new string.
+  ///
+  /// This method is non-destructive: it does not discard existing edits or
+  /// change the [original] string. Further edits can be added and this method
+  /// can be called again.
+  ///
+  /// Throws [UnsupportedError] if the edits were overlapping. If no edits were
+  /// made, the original string will be returned.
+  String toString() {
+    var sb = new StringBuffer();
+    if (_edits.length == 0) return original;
+
+    // Sort edits by start location.
+    _edits.sort();
+
+    int consumed = 0;
+    for (var edit in _edits) {
+      if (consumed > edit.begin) {
+        sb = new StringBuffer();
+        sb.write('overlapping edits. Insert at offset ');
+        sb.write(edit.begin);
+        sb.write(' but have consumed ');
+        sb.write(consumed);
+        sb.write(' input characters. List of edits:');
+        for (var e in _edits) {
+          sb.write('\n    ');
+          sb.write(e);
+        }
+        throw new UnsupportedError(sb.toString());
+      }
+
+      // Add characters from the original string between this edit and the last
+      // one, if any.
+      var betweenEdits = original.substring(consumed, edit.begin);
+      sb.write(betweenEdits);
+      sb.write(edit.string);
+      consumed = edit.end;
+    }
+
+    // Add any text from the end of the original string that was not replaced.
+    sb.write(original.substring(consumed));
+    return sb.toString();
+  }
+}
+
+/// A single edit in a [StringEditBuffer].
+class _StringEdit implements Comparable<_StringEdit> {
+  // Offset where edit begins
+  final int begin;
+
+  // Offset where edit ends
+  final int end;
+
+  // Sort index as a tie-breaker for edits that have the same location.
+  final int sortId;
+
+  // String to insert
+  final String string;
+
+  _StringEdit(int begin, this.end, this.string, [int sortId])
+    : begin = begin, sortId = sortId == null ? begin : sortId;
+
+  int get length => end - begin;
+
+  String toString() => '(Edit @ $begin,$end: "$string")';
+
+  int compareTo(_StringEdit other) {
+    int diff = begin - other.begin;
+    if (diff != 0) return diff;
+    diff = end - other.end;
+    if (diff != 0) return diff;
+    // use edit order as a tie breaker
+    return sortId - other.sortId;
+  }
+}