cef_drag_data.h

// Copyright (c) 2013 Marshall A. Greenblatt. 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 name Chromium Embedded
// Framework 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,
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// 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.
//
// ---------------------------------------------------------------------------
//
// The contents of this file must follow a specific format in order to
// support the CEF translator tool. See the translator.README.txt file in the
// tools directory for more information.
//

#ifndef CEF_INCLUDE_CEF_DRAG_DATA_H_
#define CEF_INCLUDE_CEF_DRAG_DATA_H_
#pragma once

#include <vector>
#include "include/cef_base.h"
#include "include/cef_image.h"
#include "include/cef_stream.h"

///
// Class used to represent drag data. The methods of this class may be called
// on any thread.
///
/*--cef(source=library)--*/
class CefDragData : public virtual CefBaseRefCounted {
 public:
  ///
  // Create a new CefDragData object.
  ///
  /*--cef()--*/
  static CefRefPtr<CefDragData> Create();

  ///
  // Returns a copy of the current object.
  ///
  /*--cef()--*/
  virtual CefRefPtr<CefDragData> Clone() = 0;

  ///
  // Returns true if this object is read-only.
  ///
  /*--cef()--*/
  virtual bool IsReadOnly() = 0;

  ///
  // Returns true if the drag data is a link.
  ///
  /*--cef()--*/
  virtual bool IsLink() = 0;

  ///
  // Returns true if the drag data is a text or html fragment.
  ///
  /*--cef()--*/
  virtual bool IsFragment() = 0;

  ///
  // Returns true if the drag data is a file.
  ///
  /*--cef()--*/
  virtual bool IsFile() = 0;

  ///
  // Return the link URL that is being dragged.
  ///
  /*--cef()--*/
  virtual CefString GetLinkURL() = 0;

  ///
  // Return the title associated with the link being dragged.
  ///
  /*--cef()--*/
  virtual CefString GetLinkTitle() = 0;

  ///
  // Return the metadata, if any, associated with the link being dragged.
  ///
  /*--cef()--*/
  virtual CefString GetLinkMetadata() = 0;

  ///
  // Return the plain text fragment that is being dragged.
  ///
  /*--cef()--*/
  virtual CefString GetFragmentText() = 0;

  ///
  // Return the text/html fragment that is being dragged.
  ///
  /*--cef()--*/
  virtual CefString GetFragmentHtml() = 0;

  ///
  // Return the base URL that the fragment came from. This value is used for
  // resolving relative URLs and may be empty.
  ///
  /*--cef()--*/
  virtual CefString GetFragmentBaseURL() = 0;

  ///
  // Return the name of the file being dragged out of the browser window.
  ///
  /*--cef()--*/
  virtual CefString GetFileName() = 0;

  ///
  // Write the contents of the file being dragged out of the web view into
  // |writer|. Returns the number of bytes sent to |writer|. If |writer| is
  // NULL this method will return the size of the file contents in bytes.
  // Call GetFileName() to get a suggested name for the file.
  ///
  /*--cef(optional_param=writer)--*/
  virtual size_t GetFileContents(CefRefPtr<CefStreamWriter> writer) = 0;

  ///
  // Retrieve the list of file names that are being dragged into the browser
  // window.
  ///
  /*--cef()--*/
  virtual bool GetFileNames(std::vector<CefString>& names) = 0;

  ///
  // Set the link URL that is being dragged.
  ///
  /*--cef(optional_param=url)--*/
  virtual void SetLinkURL(const CefString& url) = 0;

  ///
  // Set the title associated with the link being dragged.
  ///
  /*--cef(optional_param=title)--*/
  virtual void SetLinkTitle(const CefString& title) = 0;

  ///
  // Set the metadata associated with the link being dragged.
  ///
  /*--cef(optional_param=data)--*/
  virtual void SetLinkMetadata(const CefString& data) = 0;

  ///
  // Set the plain text fragment that is being dragged.
  ///
  /*--cef(optional_param=text)--*/
  virtual void SetFragmentText(const CefString& text) = 0;

  ///
  // Set the text/html fragment that is being dragged.
  ///
  /*--cef(optional_param=html)--*/
  virtual void SetFragmentHtml(const CefString& html) = 0;

  ///
  // Set the base URL that the fragment came from.
  ///
  /*--cef(optional_param=base_url)--*/
  virtual void SetFragmentBaseURL(const CefString& base_url) = 0;

  ///
  // Reset the file contents. You should do this before calling
  // CefBrowserHost::DragTargetDragEnter as the web view does not allow us to
  // drag in this kind of data.
  ///
  /*--cef()--*/
  virtual void ResetFileContents() = 0;

  ///
  // Add a file that is being dragged into the webview.
  ///
  /*--cef(optional_param=display_name)--*/
  virtual void AddFile(const CefString& path,
                       const CefString& display_name) = 0;

  ///
  // Clear list of filenames.
  ///
  /*--cef()--*/
  virtual void ClearFilenames() = 0;

  ///
  // Get the image representation of drag data. May return NULL if no image
  // representation is available.
  ///
  /*--cef()--*/
  virtual CefRefPtr<CefImage> GetImage() = 0;

  ///
  // Get the image hotspot (drag start location relative to image dimensions).
  ///
  /*--cef()--*/
  virtual CefPoint GetImageHotspot() = 0;

  ///
  // Returns true if an image representation of drag data is available.
  ///
  /*--cef()--*/
  virtual bool HasImage() = 0;
};

#endif  // CEF_INCLUDE_CEF_DRAG_DATA_H_