Implement input type=color UI

chrome/browser/color_select_helper.h

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_COLOR_SELECT_HELPER_H_
+#define CHROME_BROWSER_COLOR_SELECT_HELPER_H_
+#pragma once
+
+#include "content/public/browser/web_contents_observer.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/ui/color_chooser.h"
+#include "chrome/browser/ui/color_chooser_dialog.h"
+
+class ColorSelectHelper
+      : public ColorChooser::Listener,
+        public ColorChooserDialog::Listener {
+ public:
+  explicit ColorSelectHelper();
+  virtual ~ColorSelectHelper();
+
+  virtual void DidChooseColor(WebKit::WebColor color) OVERRIDE;
+  virtual void DidEnd() OVERRIDE;
+
+  // Called when web page asks to open the color chooser.
+  void OpenColorChooser(content::WebContents* tab,
+                        const WebKit::WebColor& color);
+
+  // Called when the originating element is no longer available and the color
+  // chooser should end.
+  void EndColorChooser(content::WebContents* tab);
+
+  // Called when input element's value changes and the color chooser should
+  // reflect that.
+  void SetSelectedColorInColorChooser(content::WebContents* tab,
+                                      const WebKit::WebColor& color);
+
+  virtual RenderViewHost* GetRenderViewHost() OVERRIDE;
+
+ private:
+
+  // The RenderViewHost for the page showing the color chooser.
+  // EndColorChooser and SetSelectedColorInColorChooser from other
+  // RenderViewHosts will be ignored.
+  content::WebContents* tab_;
+
+  // Dialog box used for choosing color.
+  scoped_ptr<ColorChooser> color_chooser_;
+
+  DISALLOW_COPY_AND_ASSIGN(ColorSelectHelper);
+};
+
+#endif  // CHROME_BROWSER_COLOR_SELECT_HELPER_H_