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mirror of https://github.com/salvadordf/CEF4Delphi.git synced 2024-12-04 09:26:52 +02:00
CEF4Delphi/source/uCEFChromium.pas
Salvador Díaz Fau b7a4cdd786 Update to CEF 79.1.35
- Added groups to the demos with a secondary subprocess project
- Added some conditional directives for MacOS (MACOS IS NOT SUPPORTED YET!)
- Removed some Windows dependencies in the FMXExternalPumpBrowser demo
- Added TChromium.ParentFormHandle property
2020-01-28 11:36:34 +01:00

389 lines
12 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 © 2020 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 uCEFChromium;
{$IFDEF FPC}
{$MODE OBJFPC}{$H+}
{$ENDIF}
{$IFNDEF CPUX64}{$ALIGN ON}{$ENDIF}
{$MINENUMSIZE 4}
{$I cef.inc}
interface
uses
{$IFDEF DELPHI16_UP}
{$IFDEF MSWINDOWS}WinApi.Windows,{$ENDIF} System.Classes, Vcl.Controls, Vcl.Graphics, Vcl.Forms,
{$ELSE}
{$IFDEF MSWINDOWS}Windows,{$ENDIF} Classes, Controls, Graphics, Forms,
{$IFDEF FPC}
LCLProc, LCLType, LCLIntf, LResources, LMessages, InterfaceBase,
{$ELSE}
Messages,
{$ENDIF}
{$ENDIF}
uCEFTypes, uCEFInterfaces, uCEFChromiumCore;
type
{$IFNDEF FPC}{$IFDEF DELPHI16_UP}[ComponentPlatformsAttribute(pidWin32 or pidWin64)]{$ENDIF}{$ENDIF}
TChromium = class(TChromiumCore)
protected
function GetParentFormHandle : TCefWindowHandle; override;
function GetParentForm : TCustomForm;
procedure InitializeDevToolsWindowInfo(aDevTools : TWinControl); virtual;
public
{$IFDEF MSWINDOWS}
procedure InitializeDragAndDrop(const aDropTargetCtrl : TWinControl);
{$ENDIF MSWINDOWS}
procedure ShowDevTools(inspectElementAt: TPoint; const aDevTools : TWinControl = nil);
procedure CloseDevTools(const aDevTools : TWinControl = nil);
procedure MoveFormTo(const x, y: Integer);
procedure MoveFormBy(const x, y: Integer);
procedure ResizeFormWidthTo(const x : Integer);
procedure ResizeFormHeightTo(const y : Integer);
procedure SetFormLeftTo(const x : Integer);
procedure SetFormTopTo(const y : Integer);
function CreateBrowser(const aBrowserParent : TWinControl = nil; const aWindowName : ustring = ''; const aContext : ICefRequestContext = nil; const aExtraInfo : ICefDictionaryValue = nil) : boolean; overload; virtual;
function SaveAsBitmapStream(var aStream : TStream) : boolean;
function TakeSnapshot(var aBitmap : TBitmap) : boolean;
end;
{$IFDEF FPC}
procedure Register;
{$ENDIF}
// *********************************************************
// ********************** ATTENTION ! **********************
// *********************************************************
// ** **
// ** MANY OF THE EVENTS IN CEF4DELPHI COMPONENTS LIKE **
// ** TCHROMIUM, TFMXCHROMIUM OR TCEFAPPLICATION ARE **
// ** EXECUTED IN A CEF THREAD BY DEFAULT. **
// ** **
// ** WINDOWS CONTROLS MUST BE CREATED AND DESTROYED IN **
// ** THE SAME THREAD TO AVOID ERRORS. **
// ** SOME OF THEM RECREATE THE HANDLERS IF THEY ARE **
// ** MODIFIED AND CAN CAUSE THE SAME ERRORS. **
// ** **
// ** DON'T CREATE, MODIFY OR DESTROY WINDOWS CONTROLS **
// ** INSIDE THE CEF4DELPHI EVENTS AND USE **
// ** SYNCHRONIZATION OBJECTS TO PROTECT VARIABLES AND **
// ** FIELDS IF THEY ARE ALSO USED IN THE MAIN THREAD. **
// ** **
// ** READ THIS FOR MORE INFORMATION : **
// ** https://www.briskbard.com/index.php?pageid=cef **
// ** **
// ** USE OUR FORUMS FOR MORE QUESTIONS : **
// ** https://www.briskbard.com/forum/ **
// ** **
// *********************************************************
// *********************************************************
implementation
uses
{$IFDEF DELPHI16_UP}
System.SysUtils, System.Math;
{$ELSE}
SysUtils, Math;
{$ENDIF}
{ TChromium }
{$IFDEF MSWINDOWS}
procedure TChromium.InitializeDragAndDrop(const aDropTargetCtrl: TWinControl);
begin
if aDropTargetCtrl <> nil then
inherited InitializeDragAndDrop(aDropTargetCtrl.Handle);
end;
{$ENDIF MSWINDOWS}
procedure TChromium.InitializeDevToolsWindowInfo(aDevTools: TWinControl);
begin
if aDevTools <> nil then
DefaultInitializeDevToolsWindowInfo(aDevTools.Handle, aDevTools.ClientRect, aDevTools.Name)
else
DefaultInitializeDevToolsWindowInfo(0, Rect(0, 0, 0, 0), '');
end;
procedure TChromium.ShowDevTools(inspectElementAt: TPoint; const aDevTools : TWinControl);
begin
if Initialized then
begin
InitializeDevToolsWindowInfo(aDevTools);
inherited ShowDevTools(inspectElementAt, @FDevWindowInfo);
end;
end;
procedure TChromium.CloseDevTools(const aDevTools : TWinControl);
begin
if Initialized then
begin
if (aDevTools <> nil) then
inherited CloseDevTools(aDevTools.Handle)
else
inherited CloseDevTools(0);
end;
end;
function TChromium.GetParentForm : TCustomForm;
var
TempComp : TComponent;
begin
Result := nil;
TempComp := Owner;
while (TempComp <> nil) do
if (TempComp is TCustomForm) then
begin
Result := TCustomForm(TempComp);
exit;
end
else
TempComp := TempComp.owner;
end;
function TChromium.GetParentFormHandle : TCefWindowHandle;
{$IFDEF MSWINDOWS}
var
TempForm : TCustomForm;
{$ENDIF}
begin
Result := inherited GetParentFormHandle;
{$IFDEF MSWINDOWS}
TempForm := GetParentForm;
if (TempForm <> nil) and TempForm.HandleAllocated then
Result := TempForm.Handle
else
if (Application <> nil) and
(Application.MainForm <> nil) and
Application.MainForm.HandleAllocated then
Result := Application.MainForm.Handle;
{$ENDIF}
end;
procedure TChromium.MoveFormTo(const x, y: Integer);
var
TempForm : TCustomForm;
TempRect : TRect;
begin
TempForm := GetParentForm;
if (TempForm <> nil) then
begin
TempRect.Left := min(max(x, max(screen.DesktopLeft, 0)), screen.DesktopWidth - TempForm.Width);
TempRect.Top := min(max(y, max(screen.DesktopTop, 0)), screen.DesktopHeight - TempForm.Height);
TempRect.Right := TempRect.Left + TempForm.Width - 1;
TempRect.Bottom := TempRect.Top + TempForm.Height - 1;
TempForm.SetBounds(TempRect.Left, TempRect.Top, TempRect.Right - TempRect.Left + 1, TempRect.Bottom - TempRect.Top + 1);
end;
end;
procedure TChromium.MoveFormBy(const x, y: Integer);
var
TempForm : TCustomForm;
TempRect : TRect;
begin
TempForm := GetParentForm;
if (TempForm <> nil) then
begin
TempRect.Left := min(max(TempForm.Left + x, max(screen.DesktopLeft, 0)), screen.DesktopWidth - TempForm.Width);
TempRect.Top := min(max(TempForm.Top + y, max(screen.DesktopTop, 0)), screen.DesktopHeight - TempForm.Height);
TempRect.Right := TempRect.Left + TempForm.Width - 1;
TempRect.Bottom := TempRect.Top + TempForm.Height - 1;
TempForm.SetBounds(TempRect.Left, TempRect.Top, TempRect.Right - TempRect.Left + 1, TempRect.Bottom - TempRect.Top + 1);
end;
end;
procedure TChromium.ResizeFormWidthTo(const x : Integer);
var
TempForm : TCustomForm;
TempX, TempDeltaX : integer;
begin
TempForm := GetParentForm;
if (TempForm <> nil) then
begin
TempX := max(x, 100);
TempDeltaX := TempForm.Width - TempForm.ClientWidth;
TempForm.Width := TempX + TempDeltaX;
end;
end;
procedure TChromium.ResizeFormHeightTo(const y : Integer);
var
TempForm : TCustomForm;
TempY, TempDeltaY : integer;
begin
TempForm := GetParentForm;
if (TempForm <> nil) then
begin
TempY := max(y, 100);
TempDeltaY := TempForm.Height - TempForm.ClientHeight;
TempForm.Height := TempY + TempDeltaY;
end;
end;
procedure TChromium.SetFormLeftTo(const x : Integer);
var
TempForm : TCustomForm;
begin
TempForm := GetParentForm;
if (TempForm <> nil) then
TempForm.Left := min(max(x, max(screen.DesktopLeft, 0)), screen.DesktopWidth - TempForm.Width);
end;
procedure TChromium.SetFormTopTo(const y : Integer);
var
TempForm : TCustomForm;
begin
TempForm := GetParentForm;
if (TempForm <> nil) then
TempForm.Top := min(max(y, max(screen.DesktopTop, 0)), screen.DesktopHeight - TempForm.Height);
end;
function TChromium.CreateBrowser(const aBrowserParent : TWinControl;
const aWindowName : ustring;
const aContext : ICefRequestContext;
const aExtraInfo : ICefDictionaryValue) : boolean;
var
TempHandle : HWND;
TempRect : TRect;
begin
if (aBrowserParent <> nil) then
begin
TempHandle := aBrowserParent.Handle;
TempRect := aBrowserParent.ClientRect;
end
else
begin
TempHandle := 0;
TempRect := rect(0, 0, 0, 0);
end;
Result := inherited CreateBrowser(TempHandle, TempRect, aWindowName, aContext, aExtraInfo);
end;
function TChromium.SaveAsBitmapStream(var aStream : TStream) : boolean;
{$IFDEF MSWINDOWS}
var
TempDC : HDC;
TempRect : TRect;
{$ENDIF}
begin
Result := False;
{$IFDEF MSWINDOWS}
if not(FIsOSR) and (FRenderCompHWND <> 0) and (aStream <> nil) then
begin
TempDC := GetDC(FRenderCompHWND);
if (TempDC <> 0) then
try
GetClientRect(FRenderCompHWND, TempRect);
Result := CopyDCToBitmapStream(TempDC, TempRect, aStream);
finally
ReleaseDC(FRenderCompHWND, TempDC);
end;
end;
{$ENDIF}
end;
function TChromium.TakeSnapshot(var aBitmap : TBitmap) : boolean;
{$IFDEF MSWINDOWS}
var
TempDC : HDC;
TempRect : TRect;
TempWidth : Integer;
TempHeight : Integer;
{$ENDIF}
begin
Result := False;
{$IFDEF MSWINDOWS}
if not(FIsOSR) and (FRenderCompHWND <> 0) then
begin
GetClientRect(FRenderCompHWND, TempRect);
TempWidth := TempRect.Right - TempRect.Left;
TempHeight := TempRect.Bottom - TempRect.Top;
if (TempWidth <= 0) or (TempHeight <= 0) then exit;
if (aBitmap <> nil) then FreeAndNil(aBitmap);
aBitmap := TBitmap.Create;
aBitmap.Height := TempHeight;
aBitmap.Width := TempWidth;
TempDC := GetDC(FRenderCompHWND);
if (TempDC <> 0) then
try
Result := BitBlt(aBitmap.Canvas.Handle, 0, 0, TempWidth, TempHeight,
TempDC, 0, 0, SRCCOPY);
finally
ReleaseDC(FRenderCompHWND, TempDC);
end;
end;
{$ENDIF}
end;
{$IFDEF FPC}
procedure Register;
begin
{$I res/tchromium.lrs}
RegisterComponents('Chromium', [TChromium]);
end;
{$ENDIF}
end.