cef/include/capi/cef_drag_handler_capi.h

// Copyright (c) 2023 Marshall A. Greenblatt. All rights reserved.
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#ifndef CEF_INCLUDE_CAPI_CEF_DRAG_HANDLER_CAPI_H_
#define CEF_INCLUDE_CAPI_CEF_DRAG_HANDLER_CAPI_H_
#pragma once

#include "include/capi/cef_base_capi.h"
#include "include/capi/cef_browser_capi.h"
#include "include/capi/cef_drag_data_capi.h"
#include "include/capi/cef_frame_capi.h"

#ifdef __cplusplus
extern "C" {
#endif

///
/// Implement this structure to handle events related to dragging. The functions
/// of this structure will be called on the UI thread.
///
typedef struct _cef_drag_handler_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// Called when an external drag event enters the browser window. |dragData|
  /// contains the drag event data and |mask| represents the type of drag
  /// operation. Return false (0) for default drag handling behavior or true (1)
  /// to cancel the drag event.
  ///
  int(CEF_CALLBACK* on_drag_enter)(struct _cef_drag_handler_t* self,
                                   struct _cef_browser_t* browser,
                                   struct _cef_drag_data_t* dragData,
                                   cef_drag_operations_mask_t mask);

  ///
  /// Called whenever draggable regions for the browser window change. These can
  /// be specified using the '-webkit-app-region: drag/no-drag' CSS-property. If
  /// draggable regions are never defined in a document this function will also
  /// never be called. If the last draggable region is removed from a document
  /// this function will be called with an NULL vector.
  ///
  void(CEF_CALLBACK* on_draggable_regions_changed)(
      struct _cef_drag_handler_t* self,
      struct _cef_browser_t* browser,
      struct _cef_frame_t* frame,
      size_t regionsCount,
      cef_draggable_region_t const* regions);
} cef_drag_handler_t;

#ifdef __cplusplus
}
#endif

#endif  // CEF_INCLUDE_CAPI_CEF_DRAG_HANDLER_CAPI_H_