// ************************************************************************ // ***************************** 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 * 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}{$ENDIF} TChromium = class(TChromiumCore) protected function GetParentForm : TCustomForm; procedure InitializeDevToolsWindowInfo(aDevTools : TWinControl); virtual; public {$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; 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.