Add observatory_pub_packages snapshot to third_party

observatory_pub_packages/polymer/src/build/log_injector.dart

Index: observatory_pub_packages/polymer/src/build/log_injector.dart
===================================================================
--- observatory_pub_packages/polymer/src/build/log_injector.dart	(revision 0)
+++ observatory_pub_packages/polymer/src/build/log_injector.dart	(working copy)
@@ -0,0 +1,134 @@
+// Copyright (c) 2013, 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.
+
+/// This library provides a single function called injectLogs which when called
+/// will request a logs json file and build a small widget out of them which
+/// groups the logs by level.
+library polymer.build.log_injector;
+
+import 'dart:async';
+import 'dart:convert';
+import 'dart:html';
+
+import 'package:path/path.dart' as path;
+import 'package:source_span/source_span.dart';
+import 'package:code_transformers/messages/messages.dart';
+
+class LogInjector {
+  Element selectedMenu;
+  Element selectedContent;
+
+  // Gets the logs from a url and inject them into the dom.
+  Future injectLogsFromUrl(String url) =>
+      HttpRequest.getString(url).then((data) => injectLogs(data));
+
+  // Builds the html for the logs element given some logs, and injects that
+  // into the dom. Currently, we do not  use Polymer just to ensure that the
+  // page works regardless of the state of the app. Ideally, we could have
+  // multiple scripts running independently so we could ensure that this would
+  // always be running.
+  injectLogs(String data) {
+    var logs = new LogEntryTable.fromJson(JSON.decode(data));
+    if (logs.entries.isEmpty) return;
+
+    // Group all logs by level.
+    var logsByLevel = {
+    };
+    logs.entries.values.forEach((list) => list.forEach((log) {
+      logsByLevel.putIfAbsent(log.level, () => []);
+      logsByLevel[log.level].add(log);
+    }));
+    if (logsByLevel.isEmpty) return;
+
+    // Build the wrapper, menu, and content divs.
+
+    var menuWrapper = new DivElement()
+      ..classes.add('menu');
+    var contentWrapper = new DivElement()
+      ..classes.add('content');
+    var wrapperDiv = new DivElement()
+      ..classes.add('build-logs')
+      ..append(menuWrapper)
+      ..append(contentWrapper);
+
+    // For each log level, add a menu item, content section, and all the logs.
+    logsByLevel.forEach((level, logs) {
+      var levelClassName = level.toLowerCase();
+
+      // Add the menu item and content item.
+      var menuItem = new Element.html(
+          '<div class="$levelClassName">'
+          '$level <span class="num">(${logs.length})</span>'
+          '</div>');
+      menuWrapper.append(menuItem);
+      var contentItem = new DivElement()
+        ..classes.add(levelClassName);
+      contentWrapper.append(contentItem);
+
+      // Set up the click handlers.
+      menuItem.onClick.listen((_) {
+        if (selectedMenu == menuItem) {
+          selectedMenu = null;
+          selectedContent = null;
+        } else {
+          if (selectedMenu != null) {
+            selectedMenu.classes.remove('active');
+            selectedContent.classes.remove('active');
+          }
+
+          selectedMenu = menuItem;
+          selectedContent = contentItem;
+        }
+
+        menuItem.classes.toggle('active');
+        contentItem.classes.toggle('active');
+      });
+
+      // Add the logs to the content item.
+      for (var log in logs) {
+        var logHtml = new StringBuffer();
+        logHtml.write('<div class="log">');
+
+        var id = log.message.id;
+        var hashTag = '${id.package}_${id.id}';
+        var message = new HtmlEscape().convert(log.message.snippet);
+        message.replaceAllMapped(_urlRegex,
+            (m) => '<a href="${m.group(0)}" target="blank">${m.group(0)}</a>');
+        logHtml.write('<div class="message $levelClassName">$message '
+            '<a target="blank" href='
+            '"/packages/polymer/src/build/generated/messages.html#$hashTag">'
+            '(more details)</a></div>');
+        var span = log.span;
+        if (span != null) {
+          logHtml.write('<div class="location">');
+          var text = new HtmlEscape().convert(span.text);
+          logHtml.write(
+              '  <span class="location">${span.start.toolString}</span></div>'
+              '  <span class="text">$text</span>''</div>');
+          logHtml.write('</div>');
+        }
+        logHtml.write('</div>');
+
+        var logElement = new Element.html(logHtml.toString(),
+            validator: new NodeValidatorBuilder.common()
+              ..allowNavigation(new _OpenUriPolicy()));
+        contentItem.append(logElement);
+        var messageElement = logElement.querySelector('.message');
+        messageElement.onClick.listen((e) {
+          if (e.target == messageElement) {
+            messageElement.classes.toggle('expanded');
+          }
+        });
+      };
+    });
+
+    document.body.append(wrapperDiv);
+  }
+
+}
+
+final _urlRegex = new RegExp('http://[^ ]*');
+class _OpenUriPolicy implements UriPolicy {
+  bool allowsUri(String uri) => true;
+}