Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 88 insertions, 0 deletions

diff --git a/Source/WebCore/inspector/front-end/HelpScreen.js b/Source/WebCore/inspector/front-end/HelpScreen.js
new file mode 100644
index 0000000..a1bbf1e
--- /dev/null
+++ b/Source/WebCore/inspector/front-end/HelpScreen.js
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2010 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WebInspector.HelpScreen = function(title)
+{
+    this._element = document.createElement("div");
+    this._element.className = "help-window-outer";
+    this._element.addEventListener("keydown", this._onKeyDown.bind(this), false);
+
+    var mainWindow = this._element.createChild("div", "help-window-main");
+    var captionWindow = mainWindow.createChild("div", "help-window-caption");
+    var closeButton = captionWindow.createChild("button", "help-close-button");
+    this.contentElement = mainWindow.createChild("div", "help-content");
+    this.contentElement.tabIndex = 0;
+    this.contentElement.addEventListener("blur", this._onBlur.bind(this), false);
+    captionWindow.createChild("h1", "help-window-title").innerText = title;
+
+    closeButton.innerText = "\u2716"; // Code stands for HEAVY MULTIPLICATION X.
+    closeButton.addEventListener("click", this._hide.bind(this), false);
+    this._closeKeys = [
+        WebInspector.KeyboardShortcut.Keys.Enter.code,
+        WebInspector.KeyboardShortcut.Keys.Esc.code,
+        WebInspector.KeyboardShortcut.Keys.Space.code,
+    ];
+    document.body.appendChild(this._element);
+}
+
+WebInspector.HelpScreen.prototype = {
+    show: function()
+    {
+        if (this._isShown)
+            return;
+
+        this._element.style.visibility = "visible";
+        this._isShown = true;
+        this._previousFocusElement = WebInspector.currentFocusElement;
+        WebInspector.currentFocusElement = this.contentElement;
+    },
+
+    _hide: function()
+    {
+        this._isShown = false;
+        this._element.style.visibility = "hidden";
+        WebInspector.currentFocusElement = this._previousFocusElement;
+    },
+
+    _onKeyDown: function(event)
+    {
+        if (this._isShown && this._closeKeys.indexOf(event.keyCode) >= 0) {
+            this._hide();
+            event.stopPropagation();
+        }
+    },
+
+    _onBlur: function()
+    {
+         // Pretend we're modal, grab focus back if we're still shown.
+        if (this._isShown)
+            WebInspector.currentFocusElement = this.contentElement;
+    }
+}