cef/include/cef_display_handler.h

// Copyright (c) 2012 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
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// 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_DISPLAY_HANDLER_H_
#define CEF_INCLUDE_CEF_DISPLAY_HANDLER_H_
#pragma once

#include "include/cef_api_hash.h"
#include "include/cef_base.h"
#include "include/cef_browser.h"
#include "include/cef_frame.h"

///
/// Implement this interface to handle events related to browser display state.
/// The methods of this class will be called on the UI thread.
///
/*--cef(source=client)--*/
class CefDisplayHandler : public virtual CefBaseRefCounted {
 public:
  ///
  /// Called when a frame's address has changed.
  ///
  /*--cef()--*/
  virtual void OnAddressChange(CefRefPtr<CefBrowser> browser,
                               CefRefPtr<CefFrame> frame,
                               const CefString& url) {}

  ///
  /// Called when the page title changes.
  ///
  /*--cef(optional_param=title)--*/
  virtual void OnTitleChange(CefRefPtr<CefBrowser> browser,
                             const CefString& title) {}

  ///
  /// Called when the page icon changes.
  ///
  /*--cef(optional_param=icon_urls)--*/
  virtual void OnFaviconURLChange(CefRefPtr<CefBrowser> browser,
                                  const std::vector<CefString>& icon_urls) {}

  ///
  /// Called when web content in the page has toggled fullscreen mode. If
  /// |fullscreen| is true the content will automatically be sized to fill the
  /// browser content area. If |fullscreen| is false the content will
  /// automatically return to its original size and position. With Alloy style
  /// the client is responsible for triggering the fullscreen transition (for
  /// example, by calling CefWindow::SetFullscreen when using Views). With
  /// Chrome style the fullscreen transition will be triggered automatically.
  /// The CefWindowDelegate::OnWindowFullscreenTransition method will be called
  /// during the fullscreen transition for notification purposes.
  ///
  /*--cef()--*/
  virtual void OnFullscreenModeChange(CefRefPtr<CefBrowser> browser,
                                      bool fullscreen) {}

  ///
  /// Called when the browser is about to display a tooltip. |text| contains the
  /// text that will be displayed in the tooltip. To handle the display of the
  /// tooltip yourself return true. Otherwise, you can optionally modify |text|
  /// and then return false to allow the browser to display the tooltip.
  /// When window rendering is disabled the application is responsible for
  /// drawing tooltips and the return value is ignored.
  ///
  /*--cef(optional_param=text)--*/
  virtual bool OnTooltip(CefRefPtr<CefBrowser> browser, CefString& text) {
    return false;
  }

  ///
  /// Called when the browser receives a status message. |value| contains the
  /// text that will be displayed in the status message.
  ///
  /*--cef(optional_param=value)--*/
  virtual void OnStatusMessage(CefRefPtr<CefBrowser> browser,
                               const CefString& value) {}

  ///
  /// Called to display a console message. Return true to stop the message from
  /// being output to the console.
  ///
  /*--cef(optional_param=message,optional_param=source)--*/
  virtual bool OnConsoleMessage(CefRefPtr<CefBrowser> browser,
                                cef_log_severity_t level,
                                const CefString& message,
                                const CefString& source,
                                int line) {
    return false;
  }

  ///
  /// Called when auto-resize is enabled via
  /// CefBrowserHost::SetAutoResizeEnabled and the contents have auto-resized.
  /// |new_size| will be the desired size in DIP coordinates. Return true if
  /// the resize was handled or false for default handling.
  ///
  /*--cef()--*/
  virtual bool OnAutoResize(CefRefPtr<CefBrowser> browser,
                            const CefSize& new_size) {
    return false;
  }

  ///
  /// Called when the overall page loading progress has changed. |progress|
  /// ranges from 0.0 to 1.0.
  ///
  /*--cef()--*/
  virtual void OnLoadingProgressChange(CefRefPtr<CefBrowser> browser,
                                       double progress) {}

  ///
  /// Called when the browser's cursor has changed. If |type| is CT_CUSTOM then
  /// |custom_cursor_info| will be populated with the custom cursor information.
  /// Return true if the cursor change was handled or false for default
  /// handling.
  ///
  /*--cef()--*/
  virtual bool OnCursorChange(CefRefPtr<CefBrowser> browser,
                              CefCursorHandle cursor,
                              cef_cursor_type_t type,
                              const CefCursorInfo& custom_cursor_info) {
    return false;
  }

  ///
  /// Called when the browser's access to an audio and/or video source has
  /// changed.
  ///
  /*--cef()--*/
  virtual void OnMediaAccessChange(CefRefPtr<CefBrowser> browser,
                                   bool has_video_access,
                                   bool has_audio_access) {}

#if CEF_API_ADDED(CEF_NEXT)
  ///
  /// Called when JavaScript is requesting new bounds via window.moveTo/By() or
  /// window.resizeTo/By(). |new_bounds| are in DIP screen coordinates.
  ///
  /// With Views-hosted browsers |new_bounds| are the desired bounds for
  /// the containing CefWindow and may be passed directly to
  /// CefWindow::SetBounds. With external (client-provided) parent on macOS and
  /// Windows |new_bounds| are the desired frame bounds for the containing root
  /// window. With other non-Views browsers |new_bounds| are the desired bounds
  /// for the browser content only unless the client implements either
  /// CefDisplayHandler::GetRootWindowScreenRect for windowed browsers or
  /// CefRenderHandler::GetWindowScreenRect for windowless browsers. Clients may
  /// expand browser content bounds to window bounds using OS-specific or
  /// CefDisplay methods.
  ///
  /// Return true if this method was handled or false for default handling.
  /// Default move/resize behavior is only provided with Views-hosted Chrome
  /// style browsers.
  ///
  /*--cef(added=next)--*/
  virtual bool OnContentsBoundsChange(CefRefPtr<CefBrowser> browser,
                                      const CefRect& new_bounds) {
    return false;
  }

  ///
  /// Called to retrieve the external (client-provided) root window rectangle in
  /// screen DIP coordinates. Only called for windowed browsers on Windows and
  /// Linux. Return true if the rectangle was provided. Return false to use the
  /// root window bounds on Windows or the browser content bounds on Linux. For
  /// additional usage details see CefBrowserHost::NotifyScreenInfoChanged.
  ///
  /*--cef(added=next)--*/
  virtual bool GetRootWindowScreenRect(CefRefPtr<CefBrowser> browser,
                                       CefRect& rect) {
    return false;
  }
#endif
};

#endif  // CEF_INCLUDE_CEF_DISPLAY_HANDLER_H_