generate an html report of the compilation results

lib/src/report/html_reporter.dart

Index: lib/src/report/html_reporter.dart
diff --git a/lib/src/report/html_reporter.dart b/lib/src/report/html_reporter.dart
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+++ b/lib/src/report/html_reporter.dart
@@ -0,0 +1,525 @@
+// 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.
+
+library dev_compiler.src.html_reporter;
+
+import 'dart:collection' show LinkedHashSet;
+import 'dart:convert' show HTML_ESCAPE;
+import 'dart:io';
+
+import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer/src/generated/error.dart';
+import 'package:analyzer/src/generated/source.dart';
+import 'package:source_span/source_span.dart';
+import 'package:yaml/yaml.dart' as yaml;
+
+import '../../devc.dart';
+import '../options.dart';
+import '../report.dart';
+import '../summary.dart';
+import 'html_gen.dart';
+
+/// Generate a compilation summary using the [Primer](http://primercss.io) css.
+class HtmlReporter implements AnalysisErrorListener {
+  final AnalysisContext context;
+  SummaryReporter reporter;
+  List<AnalysisError> errors = [];
+
+  HtmlReporter(this.context) {
+    reporter = new SummaryReporter(context);
+  }
+
+  void onError(AnalysisError error) {
+    try {
+      reporter.onError(error);
+    } catch (e, st) {
+      // TODO: This can fail when extracting context spans.
+      print('${e}:${st}');
+    }
+
+    errors.add(error);
+  }
+
+  void finish(CompilerOptions options) {
+    GlobalSummary result = reporter.result;
+
+    // Find all referenced packages - both those with and without issues.
+    List<String> allPackages = context.sources
+        .where((s) => s.uriKind == UriKind.PACKAGE_URI)
+        .map((s) => s.uri.pathSegments.first)
+        .toSet()
+        .toList();
+
+    String input = options.inputs.first;
+    List<SummaryInfo> summaries = [];
+
+    // Hoist the self-ref package to an `Application` category.
+    String packageName = _getPackageName();
+    if (result.packages.containsKey(packageName)) {
+      PackageSummary summary = result.packages[packageName];
+      List<MessageSummary> issues = summary.libraries.values
+          .expand((LibrarySummary l) => l.messages)
+          .toList();
+      summaries.add(new SummaryInfo(
+          'Application code', packageName, 'package:${packageName}', issues));
+    }
+
+    // package: code
+    List<String> keys = result.packages.keys.toList();
+    allPackages.forEach((name) {
+      if (!keys.contains(name)) keys.add(name);
+    });
+    keys.sort();
+
+    for (String name in keys) {
+      if (name == packageName) continue;
+
+      PackageSummary summary = result.packages[name];
+
+      if (summary == null) {
+        summaries.add(new SummaryInfo('Package: code', name));
+      } else {
+        List<MessageSummary> issues = summary.libraries.values
+            .expand((LibrarySummary summary) => summary.messages)
+            .toList();
+        summaries.add(
+            new SummaryInfo('Package: code', name, 'package:${name}', issues));
+      }
+    }
+
+    // dart: code
+    keys = result.system.keys.toList()..sort();
+    for (String name in keys) {
+      LibrarySummary summary = result.system[name];
+      summaries.add(new SummaryInfo(
+          'Dart: code', name, 'dart:${name}', summary.messages));
+    }
+
+    // Loose files
+    if (result.loose.isNotEmpty) {
+      List<MessageSummary> issues = result.loose.values
+          .expand((IndividualSummary summary) => summary.messages)
+          .toList();
+      summaries.add(new SummaryInfo('Files', 'files', 'files', issues));
+    }
+
+    // Write the html report.
+    Page page = new Page(input, input, summaries);
+    String path = '${input.replaceAll('.', '_')}_results.html';
+    new File(path).writeAsStringSync(page.create());
+    print('Compilation report available at ${path}; ${errors.length} issues.');
+  }
+
+  String _getPackageName() {
+    File file = new File('pubspec.yaml');
+    if (file.existsSync()) {
+      var doc = yaml.loadYaml(file.readAsStringSync());
+      return doc['name'];
+    } else {
+      return null;
+    }
+  }
+}
+
+class SummaryInfo {
+  static int _compareIssues(MessageSummary a, MessageSummary b) {
+    int result = _compareSeverity(a.level, b.level);
+    if (result != 0) return result;
+    result = a.span.sourceUrl.toString().compareTo(b.span.sourceUrl.toString());
+    if (result != 0) return result;
+    return a.span.start.compareTo(b.span.start);
+  }
+
+  static const _sevTable = const {'error': 0, 'warning': 1, 'info': 2};
+
+  static int _compareSeverity(String a, String b) =>
+      _sevTable[a] - _sevTable[b];
+
+  final String category;
+  final String shortTitle;
+  final String longTitle;
+  final List<MessageSummary> issues;
+
+  SummaryInfo(this.category, this.shortTitle, [this.longTitle, this.issues]) {
+    issues?.sort(_compareIssues);
+  }
+
+  String get ref => longTitle == null ? null : longTitle.replaceAll(':', '_');
+
+  int get errorCount =>
+      issues == null ? 0 : issues.where((i) => i.level == 'error').length;
+  int get warningCount =>
+      issues == null ? 0 : issues.where((i) => i.level == 'warning').length;
+  int get infoCount =>
+      issues == null ? 0 : issues.where((i) => i.level == 'info').length;
+
+  bool get hasIssues => issues == null ? false : issues.isNotEmpty;
+}
+
+class Page extends HtmlGen {
+  final String pageTitle;
+  final String inputFile;
+  final List<SummaryInfo> summaries;
+
+  Page(this.pageTitle, this.inputFile, this.summaries);
+
+  String get subTitle => 'DDC compilation report for ${inputFile}';
+
+  String create() {
+    start(
+        title: 'DDC ${pageTitle}',
+        theme: 'http://primercss.io/docs.css',
+        inlineStyle: _css);
+
+    header();
+    startTag('div', c: "container");
+    startTag('div', c: "columns docs-layout");
+
+    startTag('div', c: "column one-fourth");
+    nav();
+    endTag();
+
+    startTag('div', c: "column three-fourths");
+    subtitle();
+    contents();
+    endTag();
+
+    endTag();
+    footer();
+    endTag();
+    end();
+
+    return toString();
+  }
+
+  void header() {
+    startTag('header', c: "masthead");
+    startTag('div', c: "container");
+    title();
+    startTag('nav', c: "masthead-nav");
+    tag("a",
+        href:
+            "https://github.com/dart-lang/dev_compiler/blob/master/STRONG_MODE.md",
+        text: "Strong Mode");
+    tag("a",
+        href: "https://github.com/dart-lang/dev_compiler", text: "DDC Repo");
+    endTag();
+    endTag();
+    endTag();
+  }
+
+  void title() {
+    tag("a", c: "masthead-logo", text: pageTitle);
+  }
+
+  void subtitle() {
+    tag("h1", text: subTitle, c: "page-title");
+  }
+
+  void contents() {
+    int errorCount = summaries.fold(
+        0, (int count, SummaryInfo info) => count + info.errorCount);
+    int warningCount = summaries.fold(
+        0, (int count, SummaryInfo info) => count + info.warningCount);
+    int infoCount = summaries.fold(
+        0, (int count, SummaryInfo info) => count + info.infoCount);
+
+    List<String> messages = [];
+
+    if (errorCount > 0) {
+      messages.add("${_comma(errorCount)} ${_pluralize(errorCount, 'error')}");
+    }
+    if (warningCount > 0) {
+      messages.add(
+          "${_comma(warningCount)} ${_pluralize(warningCount, 'warning')}");
+    }
+    if (infoCount > 0) {
+      messages.add("${_comma(infoCount)} ${_pluralize(infoCount, 'info')}");
+    }
+
+    String message;
+
+    if (messages.isEmpty) {
+      message = 'no issues';
+    } else if (messages.length == 2) {
+      message = messages.join(' and ');
+    } else {
+      message = messages.join(', ');
+    }
+
+    tag("p", text: 'Found ${message}.');
+
+    for (SummaryInfo info in summaries) {
+      if (!info.hasIssues) continue;
+
+      tag("h2", text: info.longTitle, attributes: "id=${info.ref}");
+      contentItem(info);
+    }
+  }
+
+  void nav() {
+    startTag("nav", c: "menu docs-menu");
+    Iterable<String> categories =
+        new LinkedHashSet.from(summaries.map((s) => s.category));
+    for (String category in categories) {
+      navItems(category, summaries.where((s) => s.category == category));
+    }
+    endTag();
+  }
+
+  void navItems(String category, List<SummaryInfo> infos) {
+    if (infos.isEmpty) return;
+
+    span(c: "menu-heading", text: category);
+
+    for (SummaryInfo info in infos) {
+      if (info.hasIssues) {
+        startTag("a", c: "menu-item", attributes: 'href="#${info.ref}"');
+
+        span(text: info.shortTitle);
+
+        int errorCount = info.errorCount;
+        int warningCount = info.warningCount;
+        int infoCount = info.infoCount;
+
+        if (infoCount > 0) {
+          span(c: "counter info", text: '${_comma(infoCount)}');
+        }
+        if (warningCount > 0) {
+          span(c: "counter warning", text: '${_comma(warningCount)}');
+        }
+        if (errorCount > 0) {
+          span(c: "counter error", text: '${_comma(errorCount)}');
+        }
+
+        endTag();
+      } else {
+        tag("div", c: "menu-item", text: info.shortTitle);
+      }
+    }
+  }
+
+  void footer() {
+    startTag('footer', c: "footer");
+    writeln("${inputFile} • DDC version ${devCompilerVersion}");
+    endTag();
+  }
+
+  void contentItem(SummaryInfo info) {
+    int errors = info.errorCount;
+    int warnings = info.warningCount;
+    int infos = info.infoCount;
+
+    if (errors > 0) {
+      span(
+          c: 'counter error',
+          text: '${_comma(errors)} ${_pluralize(errors, 'error')}');
+    }
+    if (warnings > 0) {
+      span(
+          c: 'counter warning',
+          text: '${_comma(warnings)} ${_pluralize(warnings, 'warning')}');
+    }
+    if (infos > 0) {
+      span(
+          c: 'counter info',
+          text: '${_comma(infos)} ${_pluralize(infos, 'info')}');
+    }
+
+    info.issues.forEach(emitMessage);
+  }
+
+  void emitMessage(MessageSummary issue) {
+    startTag('div', c: 'file');
+    startTag('div', c: 'file-header');
+    span(c: 'counter ${issue.level}', text: issue.kind);
+    span(c: 'file-info', text: issue.span.sourceUrl.toString());
+    endTag();
+
+    startTag('div', c: 'blob-wrapper');
+    startTag('table');
+    startTag('tbody');
+
+    // TODO: Widen the line extracts - +2 on either side.
+    // TODO: Highlight error ranges.
+    if (issue.span is SourceSpanWithContext) {
+      SourceSpanWithContext context = issue.span;
+      String text = context.context.trimRight();
+      int lineNum = context.start.line;
+
+      for (String line in text.split('\n')) {
+        lineNum++;
+        startTag('tr');
+        tag('td', c: 'blob-num', text: lineNum.toString());
+        tag('td',
+            c: 'blob-code blob-code-inner', text: HTML_ESCAPE.convert(line));
+        endTag();
+      }
+    }
+
+    startTag('tr', c: 'row-expandable');
+    tag('td', c: 'blob-num blob-num-expandable');
+    tag('td',
+        c: 'blob-code blob-code-expandable',
+        text: HTML_ESCAPE.convert(issue.message));
+    endTag();
+
+    endTag();
+    endTag();
+    endTag();
+
+    endTag();
+  }
+}
+
+String _pluralize(int count, String item) => count == 1 ? item : '${item}s';
+
+String _comma(int count) {
+  String str = '${count}';
+  if (str.length <= 3) return str;
+  int pos = str.length - 3;
+  return str.substring(0, pos) + ',' + str.substring(pos);
+}
+
+/// Deltas from the baseline Primer css (http://primercss.io/docs.css).
+const String _css = '''
+h2 {
+  margin-top: 2em;
+  padding-bottom: 0.3em;
+  font-size: 1.75em;
+  line-height: 1.225;
+  border-bottom: 1px solid #eee;
+}
+
+.error {
+  background-color: #bf1515;
+}
+
+.menu-item .counter {
+  margin-bottom: 0;
+}
+
+.counter.error {
+  color: #eee;
+  text-shadow: none;
+}
+
+.warning {
+  background-color: #ffe5a7;
+}
+
+.counter.warning {
+  color: #777;
+}
+
+.counter.error,
+.counter.warning,
+.counter.info {
+  margin-bottom: 0;
+}
+
+nav.menu .menu-item {
+  overflow-x: auto;
+}
+
+.info {
+  background-color: #eee;
+}
+
+/* code snippets styles */
+
+.file {
+  position: relative;
+  margin-top: 20px;
+  margin-bottom: 15px;
+  border: 1px solid #ddd;
+  border-radius: 3px;
+}
+
+.file-header {
+  padding: 5px 10px;
+  background-color: #f7f7f7;
+  border-bottom: 1px solid #d8d8d8;
+  border-top-left-radius: 2px;
+  border-top-right-radius: 2px;
+}
+
+.file-info {
+  font-size: 12px;
+  font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace;
+}
+
+table {
+  border-collapse: collapse;
+  border-spacing: 0;
+  margin-bottom: 0;
+}
+
+.blob-wrapper {
+  overflow-x: auto;
+  overflow-y: hidden;
+}
+
+.blob-num {
+  width: 1%;
+  min-width: 50px;
+  white-space: nowrap;
+  font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace;
+  font-size: 12px;
+  line-height: 18px;
+  color: rgba(0,0,0,0.3);
+  vertical-align: top;
+  text-align: right;
+  border: solid #eee;
+  border-width: 0 1px 0 0;
+  cursor: pointer;
+  -webkit-user-select: none;
+  -moz-user-select: none;
+  -ms-user-select: none;
+  user-select: none;
+  padding-left: 10px;
+  padding-right: 10px;
+}
+
+.blob-code {
+  padding-left: 10px;
+  padding-right: 10px;
+  vertical-align: top;
+}
+
+.blob-code-inner {
+  font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace;
+  font-size: 12px;
+  color: #333;
+  white-space: pre;
+  overflow: visible;
+  word-wrap: normal;
+}
+
+.row-expandable {
+  border-top: 1px solid #d8d8d8;
+  border-bottom-left-radius: 3px;
+  border-bottom-right-radius: 3px;
+}
+
+.blob-num-expandable,
+.blob-code-expandable {
+  vertical-align: middle;
+  font-size: 14px;
+  border-color: #d2dff0;
+}
+
+.blob-num-expandable {
+  background-color: #edf2f9;
+  border-bottom-left-radius: 3px;
+}
+
+.blob-code-expandable {
+  padding-top: 4px;
+  padding-bottom: 4px;
+  background-color: #f4f7fb;
+  border-width: 1px 0;
+  border-bottom-right-radius: 3px;
+}
+''';