Implement input type=color UI

chrome/browser/ui/color_chooser.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_UI_COLOR_CHOOSER_H_
+#define CHROME_BROWSER_UI_COLOR_CHOOSER_H_
+#pragma once
+
+#include "base/memory/singleton.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebColor.h"
+#include "ui/gfx/native_widget_types.h"
+
+// Abstraction object for color choosers of each platforms.
+class ColorChooser {
+ public:
+  // An interface implemented by a Listener object wishing to know about the
+  // the results from the color chooser.
+  class Listener {
+   public:
+    virtual void DidChooseColor(WebKit::WebColor color) = 0;
+    virtual void DidEnd() = 0;
+  };
+
+  // Returns singleton instance of ColorChooser.

[Peter Kasting, 2012/01/17 20:53:10]

This seems wrong -- why can't multiple tabs ask for color choosers?  Restricting
to a singleton doesn't seem necessary.

[keishi, 2012/01/27 04:34:08]

Multiple tabs could ask for color choosers but there should only be one open at
the same time. And thats why I used a singleton, but I guess it wasn't a good
choice.
I've quit using singletons.

+  static ColorChooser* GetInstance();
+
+  virtual void open(Listener* listener, WebKit::WebColor initial_color) = 0;

[Peter Kasting, 2012/01/17 20:53:10]

Use Chrome-style function names, not WebKit-style.

[keishi, 2012/01/27 04:34:08]

Done.

+  virtual void end(Listener* listener) = 0;
+  virtual void setSelectedColor(WebKit::WebColor color) = 0;
+
+ protected:
+  virtual ~ColorChooser() {}
+};
+
+#endif  // CHROME_BROWSER_UI_COLOR_CHOOSER_H_