Begin implementing a debugger page in Observatory.

runtime/bin/vmservice/observatory/lib/src/elements/debugger.dart

+// Copyright (c) 2014, 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 debugger_page_element;
+
+import 'dart:html';
+import 'observatory_element.dart';
+import 'package:observatory/service.dart';
+import 'package:polymer/polymer.dart';
+
+@CustomTag('debugger-page')
+class DebuggerPageElement extends ObservatoryElement {
+  @published Isolate isolate;
+  @published bool showConsole = false;
+
+  DebuggerPageElement.created() : super.created();
+
+  @override
+  void attached() {
+    super.attached();
+
+    // TODO(turnidge): Get these values from the DOM.
+    const int navbarHeight = 56;
+    const int splitterHeight = 12;
+    const int cmdHeight = 22;
+
+    var stack = $['stack'];
+    int windowHeight = window.innerHeight;
+    int available = windowHeight - (navbarHeight + splitterHeight);
+    int stackHeight = available ~/ 1.3;
+    if (showConsole) {
+      stack.style.setProperty('height', '${stackHeight}px');
+    } else {
+      stack.style.setProperty('height', '${available}px');
+    }
+  }
+}
+
+@CustomTag('debugger-stack')
+class DebuggerStackElement extends ObservatoryElement {
+  @published Isolate isolate;
+  @published ServiceMap stack;
+  @published int activeFrame = 0;
+
+  isolateChanged(oldValue) {
+    isolate.get('stacktrace').then((result) {
+        stack = result;
+      });
+  }
+
+  DebuggerStackElement.created() : super.created();
+}
+
+@CustomTag('debugger-frame')
+class DebuggerFrameElement extends ObservatoryElement {
+  @published ObservableMap frame;
+  @published bool expand = false;  // Expand by default
+  @observable String scriptHeight;
+  @observable bool expanded = false;
+  @observable bool busy = false;
+
+  DebuggerFrameElement.created() : super.created();
+
+  @override
+  void attached() {
+    super.attached();
+    int windowHeight = window.innerHeight;
+    scriptHeight = '${windowHeight ~/ 1.6}px';
+  }
+
+  void expandChanged(oldValue) {
+    if (expand != expanded) {
+      toggleExpand(null, null, null);
+    }
+  }
+
+  void toggleExpand(var a, var b, var c) {
+    if (busy) {
+      return;
+    }
+    busy = true;
+    frame['function'].load().then((func) {
+        expanded = !expanded;
+        busy = false;
+      });
+  }
+}
+
+@CustomTag('debugger-console')
+class DebuggerConsoleElement extends ObservatoryElement {
+  @published Isolate isolate;
+
+  DebuggerConsoleElement.created() : super.created();
+}
+
+@CustomTag('debugger-input')
+class DebuggerInputElement extends ObservatoryElement {
+  @published Isolate isolate;
+  @published String text = '';
+
+  @override
+  void ready() {
+    super.ready();
+    var textBox = $['textBox'];
+    textBox.select();
+    textBox.onKeyDown.listen((KeyboardEvent e) {
+        switch (e.keyCode) {
+          case KeyCode.TAB:
+            e.preventDefault();
+            textBox.setRangeText('TAB');
+            textBox.setSelectionRange(textBox.selectionStart + 3,
+                                      textBox.selectionStart + 3);
+            break;
+          case KeyCode.ENTER:
+            print('Debugger command (not implemented): $text');
+            text = '';
+            break;
+        }
+      });
+  }
+
+  DebuggerInputElement.created() : super.created();
+}
+