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CEF4Delphi/source/uCEFFocusHandler.pas
2021-01-01 11:11:30 +01:00

203 lines
5.9 KiB
ObjectPascal

// ************************************************************************
// ***************************** CEF4Delphi *******************************
// ************************************************************************
//
// CEF4Delphi is based on DCEF3 which uses CEF to embed a chromium-based
// browser in Delphi applications.
//
// The original license of DCEF3 still applies to CEF4Delphi.
//
// For more information about CEF4Delphi visit :
// https://www.briskbard.com/index.php?lang=en&pageid=cef
//
// Copyright © 2021 Salvador Diaz Fau. All rights reserved.
//
// ************************************************************************
// ************ vvvv Original license and comments below vvvv *************
// ************************************************************************
(*
* Delphi Chromium Embedded 3
*
* Usage allowed under the restrictions of the Lesser GNU General Public License
* or alternatively the restrictions of the Mozilla Public License 1.1
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
* the specific language governing rights and limitations under the License.
*
* Unit owner : Henri Gourvest <hgourvest@gmail.com>
* Web site : http://www.progdigy.com
* Repository : http://code.google.com/p/delphichromiumembedded/
* Group : http://groups.google.com/group/delphichromiumembedded
*
* Embarcadero Technologies, Inc is not permitted to use or redistribute
* this source code without explicit permission.
*
*)
unit uCEFFocusHandler;
{$IFDEF FPC}
{$MODE OBJFPC}{$H+}
{$ENDIF}
{$IFNDEF CPUX64}{$ALIGN ON}{$ENDIF}
{$MINENUMSIZE 4}
{$I cef.inc}
interface
uses
uCEFBaseRefCounted, uCEFInterfaces, uCEFTypes;
type
TCefFocusHandlerOwn = class(TCefBaseRefCountedOwn, ICefFocusHandler)
protected
procedure OnTakeFocus(const browser: ICefBrowser; next: Boolean); virtual;
function OnSetFocus(const browser: ICefBrowser; source: TCefFocusSource): Boolean; virtual;
procedure OnGotFocus(const browser: ICefBrowser); virtual;
procedure RemoveReferences; virtual;
public
constructor Create; virtual;
end;
TCustomFocusHandler = class(TCefFocusHandlerOwn)
protected
FEvents : Pointer;
procedure OnTakeFocus(const browser: ICefBrowser; next: Boolean); override;
function OnSetFocus(const browser: ICefBrowser; source: TCefFocusSource): Boolean; override;
procedure OnGotFocus(const browser: ICefBrowser); override;
procedure RemoveReferences; override;
public
constructor Create(const events : IChromiumEvents); reintroduce; virtual;
destructor Destroy; override;
end;
implementation
uses
{$IFDEF DELPHI16_UP}
System.SysUtils,
{$ELSE}
SysUtils,
{$ENDIF}
uCEFMiscFunctions, uCEFLibFunctions, uCEFBrowser;
procedure cef_focus_handler_on_take_focus(self : PCefFocusHandler;
browser : PCefBrowser;
next : Integer); stdcall;
var
TempObject : TObject;
begin
TempObject := CefGetObject(self);
if (TempObject <> nil) and (TempObject is TCefFocusHandlerOwn) then
TCefFocusHandlerOwn(TempObject).OnTakeFocus(TCefBrowserRef.UnWrap(browser),
next <> 0);
end;
function cef_focus_handler_on_set_focus(self : PCefFocusHandler;
browser : PCefBrowser;
source : TCefFocusSource): Integer; stdcall;
var
TempObject : TObject;
begin
Result := Ord(False);
TempObject := CefGetObject(self);
if (TempObject <> nil) and (TempObject is TCefFocusHandlerOwn) then
Result := Ord(TCefFocusHandlerOwn(TempObject).OnSetFocus(TCefBrowserRef.UnWrap(browser),
source))
end;
procedure cef_focus_handler_on_got_focus(self : PCefFocusHandler;
browser : PCefBrowser); stdcall;
var
TempObject : TObject;
begin
TempObject := CefGetObject(self);
if (TempObject <> nil) and (TempObject is TCefFocusHandlerOwn) then
TCefFocusHandlerOwn(TempObject).OnGotFocus(TCefBrowserRef.UnWrap(browser));
end;
constructor TCefFocusHandlerOwn.Create;
begin
inherited CreateData(SizeOf(TCefFocusHandler));
with PCefFocusHandler(FData)^ do
begin
on_take_focus := {$IFDEF FPC}@{$ENDIF}cef_focus_handler_on_take_focus;
on_set_focus := {$IFDEF FPC}@{$ENDIF}cef_focus_handler_on_set_focus;
on_got_focus := {$IFDEF FPC}@{$ENDIF}cef_focus_handler_on_got_focus;
end;
end;
function TCefFocusHandlerOwn.OnSetFocus(const browser: ICefBrowser; source: TCefFocusSource): Boolean;
begin
Result := False;
end;
procedure TCefFocusHandlerOwn.OnGotFocus(const browser: ICefBrowser);
begin
//
end;
procedure TCefFocusHandlerOwn.OnTakeFocus(const browser: ICefBrowser; next: Boolean);
begin
//
end;
procedure TCefFocusHandlerOwn.RemoveReferences;
begin
//
end;
// TCustomFocusHandler
constructor TCustomFocusHandler.Create(const events : IChromiumEvents);
begin
inherited Create;
FEvents := Pointer(events);
end;
destructor TCustomFocusHandler.Destroy;
begin
RemoveReferences;
inherited Destroy;
end;
procedure TCustomFocusHandler.RemoveReferences;
begin
FEvents := nil;
end;
procedure TCustomFocusHandler.OnGotFocus(const browser: ICefBrowser);
begin
if (FEvents <> nil) then IChromiumEvents(FEvents).doOnGotFocus(browser);
end;
function TCustomFocusHandler.OnSetFocus(const browser: ICefBrowser; source: TCefFocusSource): Boolean;
begin
if (FEvents <> nil) then
Result := IChromiumEvents(FEvents).doOnSetFocus(browser, source)
else
Result := inherited OnSetFocus(browser, source);
end;
procedure TCustomFocusHandler.OnTakeFocus(const browser: ICefBrowser; next: Boolean);
begin
if (FEvents <> nil) then IChromiumEvents(FEvents).doOnTakeFocus(browser, next);
end;
end.