1 files changed, 94 insertions, 0 deletions
diff --git a/gerrit-gwtexpui/src/main/java/com/google/gwtexpui/globalkey/client/KeyCommand.java b/gerrit-gwtexpui/src/main/java/com/google/gwtexpui/globalkey/client/KeyCommand.java
new file mode 100644
index 0000000000..ba4f62649d
--- /dev/null
+++ b/gerrit-gwtexpui/src/main/java/com/google/gwtexpui/globalkey/client/KeyCommand.java
@@ -0,0 +1,94 @@
+// Copyright (C) 2009 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gwtexpui.globalkey.client;
+
+import com.google.gwt.event.dom.client.KeyCodes;
+import com.google.gwt.event.dom.client.KeyPressHandler;
+import com.google.gwtexpui.safehtml.client.SafeHtml;
+import com.google.gwtexpui.safehtml.client.SafeHtmlBuilder;
+
+
+public abstract class KeyCommand implements KeyPressHandler {
+  public static final int M_CTRL = 1 << 16;
+  public static final int M_ALT = 2 << 16;
+  public static final int M_META = 4 << 16;
+
+  public static boolean same(final KeyCommand a, final KeyCommand b) {
+    return a.getClass() == b.getClass() && a.helpText.equals(b.helpText);
+  }
+
+  final int keyMask;
+  private final String helpText;
+
+  public KeyCommand(final int mask, final int key, final String help) {
+    this(mask, (char) key, help);
+  }
+
+  public KeyCommand(final int mask, final char key, final String help) {
+    assert help != null;
+    keyMask = mask | key;
+    helpText = help;
+  }
+
+  public String getHelpText() {
+    return helpText;
+  }
+
+  SafeHtml describeKeyStroke() {
+    final SafeHtmlBuilder b = new SafeHtmlBuilder();
+
+    if ((keyMask & M_CTRL) == M_CTRL) {
+      modifier(b, KeyConstants.I.keyCtrl());
+    }
+    if ((keyMask & M_ALT) == M_ALT) {
+      modifier(b, KeyConstants.I.keyAlt());
+    }
+    if ((keyMask & M_META) == M_META) {
+      modifier(b, KeyConstants.I.keyMeta());
+    }
+
+    final char c = (char) (keyMask & 0xffff);
+    switch (c) {
+      case KeyCodes.KEY_ENTER:
+        namedKey(b, KeyConstants.I.keyEnter());
+        break;
+      case KeyCodes.KEY_ESCAPE:
+        namedKey(b, KeyConstants.I.keyEsc());
+        break;
+      default:
+        b.openSpan();
+        b.setStyleName(KeyResources.I.css().helpKey());
+        b.append(String.valueOf(c));
+        b.closeSpan();
+        break;
+    }
+
+    return b;
+  }
+
+  private void modifier(final SafeHtmlBuilder b, final String name) {
+    namedKey(b, name);
+    b.append(" + ");
+  }
+
+  private void namedKey(final SafeHtmlBuilder b, final String name) {
+    b.append('<');
+    b.openSpan();
+    b.setStyleName(KeyResources.I.css().helpKey());
+    b.append(name);
+    b.closeSpan();
+    b.append(">");
+  }
+}