Implement input type=color UI

chrome/browser/color_select_observer.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_OBSERVER_H_
+#define CHROME_BROWSER_COLOR_SELECT_OBSERVER_H_
+#pragma once
+
+#if defined(ENABLE_INPUT_COLOR)
+
+#include "content/public/browser/web_contents_observer.h"
+
+#if defined(OS_WIN)
+#include "chrome/browser/ui/color_chooser_dialog.h"
+#else
+#include "chrome/browser/ui/color_chooser.h"
+#endif
+
+class RenderViewHost;
+struct ViewHostMsg_SetSelectedColorInColorChooser_Params;
+
+class ColorSelectObserver
+    : public content::WebContentsObserver,
+#if defined(OS_WIN)
+      public ColorChooserDialog::Listener {
+#else
+      public ColorChooser::Listener {
+#endif
+ public:
+  explicit ColorSelectObserver(content::WebContents* web_contents);
+  virtual ~ColorSelectObserver();
+
+  virtual void DidChooseColor(WebKit::WebColor color) OVERRIDE;
+  virtual void DidDetach() OVERRIDE;
+
+ private:
+  // TabContentsObserver overrides.
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+  // Called when web page asks to open the color chooser.
+  void OnOpenColorChooser(
+      const ViewHostMsg_SetSelectedColorInColorChooser_Params& params);
+
+  // Called when the originating element is no longer available and the color
+  // chooser should detach.
+  void OnDetachColorChooser();
+
+  // Called when input element's value changes and the color chooser should
+  // reflect that.
+  void OnSetSelectedColorInColorChooser(
+      const ViewHostMsg_SetSelectedColorInColorChooser_Params& params);
+
+  // The RenderViewHost for the page showing the color chooser.
+  // DetachColorChooser and SetSelectedColorInColorChooser from other
+  // RenderViewHosts will be ignored.
+  RenderViewHost* render_view_host_;
+#if defined(OS_WIN)
+  // Dialog box used for choosing color.
+  scoped_refptr<ColorChooserDialog> color_chooser_dialog_;
+#endif
+
+  DISALLOW_COPY_AND_ASSIGN(ColorSelectObserver);
+};
+
+#endif // defined(ENABLE_INPUT_COLOR)
+
+#endif  // CHROME_BROWSER_COLOR_SELECT_OBSERVER_H_