1 files changed, 230 insertions, 0 deletions
diff --git a/gerrit-gwtexpui/src/main/java/com/google/gwtexpui/clippy/client/CopyableLabel.java b/gerrit-gwtexpui/src/main/java/com/google/gwtexpui/clippy/client/CopyableLabel.java
new file mode 100644
index 0000000000..273318be51
--- /dev/null
+++ b/gerrit-gwtexpui/src/main/java/com/google/gwtexpui/clippy/client/CopyableLabel.java
@@ -0,0 +1,230 @@
+// 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.clippy.client;
+
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.core.client.Scheduler;
+import com.google.gwt.event.dom.client.BlurEvent;
+import com.google.gwt.event.dom.client.BlurHandler;
+import com.google.gwt.event.dom.client.ClickEvent;
+import com.google.gwt.event.dom.client.ClickHandler;
+import com.google.gwt.event.dom.client.KeyPressEvent;
+import com.google.gwt.event.dom.client.KeyPressHandler;
+import com.google.gwt.http.client.URL;
+import com.google.gwt.user.client.Command;
+import com.google.gwt.user.client.DOM;
+import com.google.gwt.user.client.Element;
+import com.google.gwt.user.client.ui.Composite;
+import com.google.gwt.user.client.ui.FlowPanel;
+import com.google.gwt.user.client.ui.HasText;
+import com.google.gwt.user.client.ui.InlineLabel;
+import com.google.gwt.user.client.ui.Label;
+import com.google.gwt.user.client.ui.TextBox;
+import com.google.gwtexpui.safehtml.client.SafeHtml;
+import com.google.gwtexpui.safehtml.client.SafeHtmlBuilder;
+import com.google.gwtexpui.user.client.UserAgent;
+
+/**
+ * Label which permits the user to easily copy the complete content.
+ * <p>
+ * If the Flash plugin is available a "movie" is embedded that provides
+ * one-click copying of the content onto the system clipboard. The label (if
+ * visible) can also be clicked, switching from a label to an input box,
+ * allowing the user to copy the text with a keyboard shortcut.
+ */
+public class CopyableLabel extends Composite implements HasText {
+  private static final int SWF_WIDTH = 110;
+  private static final int SWF_HEIGHT = 14;
+  private static String swfUrl;
+  private static boolean flashEnabled = true;
+
+  static {
+    ClippyResources.I.css().ensureInjected();
+  }
+
+  public static boolean isFlashEnabled() {
+    return flashEnabled;
+  }
+
+  public static void setFlashEnabled(final boolean on) {
+    flashEnabled = on;
+  }
+
+  private static String swfUrl() {
+    if (swfUrl == null) {
+      swfUrl = GWT.getModuleBaseURL() + "gwtexpui_clippy1.cache.swf";
+    }
+    return swfUrl;
+  }
+
+  private final FlowPanel content;
+  private String text;
+  private int visibleLen;
+  private Label textLabel;
+  private TextBox textBox;
+  private Element swf;
+
+  /**
+   * Create a new label
+   *
+   * @param str initial content
+   */
+  public CopyableLabel(final String str) {
+    this(str, true);
+  }
+
+  /**
+   * Create a new label
+   *
+   * @param str initial content
+   * @param showLabel if true, the content is shown, if false it is hidden from
+   *        view and only the copy icon is displayed.
+   */
+  public CopyableLabel(final String str, final boolean showLabel) {
+    content = new FlowPanel();
+    initWidget(content);
+
+    text = str;
+    visibleLen = text.length();
+
+    if (showLabel) {
+      textLabel = new InlineLabel(getText());
+      textLabel.setStyleName(ClippyResources.I.css().label());
+      textLabel.addClickHandler(new ClickHandler() {
+        @Override
+        public void onClick(final ClickEvent event) {
+          showTextBox();
+        }
+      });
+      content.add(textLabel);
+    }
+    embedMovie();
+  }
+
+  /**
+   * Change the text which is displayed in the clickable label.
+   *
+   * @param text the new preview text, should be shorter than the original text
+   *        which would be copied to the clipboard.
+   */
+  public void setPreviewText(final String text) {
+    if (textLabel != null) {
+      textLabel.setText(text);
+      visibleLen = text.length();
+    }
+  }
+
+  private void embedMovie() {
+    if (flashEnabled && UserAgent.hasFlash) {
+      final String flashVars = "text=" + URL.encodeQueryString(getText());
+      final SafeHtmlBuilder h = new SafeHtmlBuilder();
+
+      h.openElement("div");
+      h.setStyleName(ClippyResources.I.css().control());
+
+      h.openElement("object");
+      h.setWidth(SWF_WIDTH);
+      h.setHeight(SWF_HEIGHT);
+      h.setAttribute("classid", "clsid:d27cdb6e-ae6d-11cf-96b8-444553540000");
+      h.paramElement("movie", swfUrl());
+      h.paramElement("FlashVars", flashVars);
+
+      h.openElement("embed");
+      h.setWidth(SWF_WIDTH);
+      h.setHeight(SWF_HEIGHT);
+      h.setAttribute("wmode", "transparent");
+      h.setAttribute("type", "application/x-shockwave-flash");
+      h.setAttribute("src", swfUrl());
+      h.setAttribute("FlashVars", flashVars);
+      h.closeSelf();
+
+      h.closeElement("object");
+      h.closeElement("div");
+
+      if (swf != null) {
+        DOM.removeChild(getElement(), swf);
+      }
+      DOM.appendChild(getElement(), swf = SafeHtml.parse(h));
+    }
+  }
+
+  public String getText() {
+    return text;
+  }
+
+  public void setText(final String newText) {
+    text = newText;
+    visibleLen = newText.length();
+
+    if (textLabel != null) {
+      textLabel.setText(getText());
+    }
+    if (textBox != null) {
+      textBox.setText(getText());
+      textBox.selectAll();
+    }
+    embedMovie();
+  }
+
+  private void showTextBox() {
+    if (textBox == null) {
+      textBox = new TextBox();
+      textBox.setText(getText());
+      textBox.setVisibleLength(visibleLen);
+      textBox.addKeyPressHandler(new KeyPressHandler() {
+        @Override
+        public void onKeyPress(final KeyPressEvent event) {
+          if (event.isControlKeyDown() || event.isMetaKeyDown()) {
+            switch (event.getCharCode()) {
+              case 'c':
+              case 'x':
+                Scheduler.get().scheduleDeferred(new Command() {
+                  public void execute() {
+                    hideTextBox();
+                  }
+                });
+                break;
+            }
+          }
+        }
+      });
+      textBox.addBlurHandler(new BlurHandler() {
+        @Override
+        public void onBlur(final BlurEvent event) {
+          hideTextBox();
+        }
+      });
+      content.insert(textBox, 1);
+    }
+
+    textLabel.setVisible(false);
+    textBox.setVisible(true);
+    Scheduler.get().scheduleDeferred(new Command() {
+      @Override
+      public void execute() {
+        textBox.selectAll();
+        textBox.setFocus(true);
+      }
+    });
+  }
+
+  private void hideTextBox() {
+    if (textBox != null) {
+      textBox.removeFromParent();
+      textBox = null;
+    }
+    textLabel.setVisible(true);
+  }
+}