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mirror of https://github.com/salvadordf/CEF4Delphi.git synced 2024-12-04 09:26:52 +02:00
CEF4Delphi/source/uCEFFMXWorkScheduler.pas
Andreas Hausladen 4cdb8207c6 uCEFApplicationCore is a VCL-free implementation (no Controls/Forms units, no Application object).
The old uCEFApplication.pas is renamed to uCEFApplicationCore.pas and a new uCEFApplication.pas is created that only contains the Controls/Forms unit related code and is backward compatible to existing code.

This allows the creation of a SubProcess executable that doesn't initialize the VCL with all its problems (GlobalAtom leak in Delphi 6-XE, Application.Handle, OleInitialize and other unnecessary init-code).

ujCEFMiscFunctions.GefCursorToWindowsCursor is renamed to >>C<<efCursorToWindowsCursor and moved to uCEFApplication.pas to prevent the inclusion of the Controls unit in Delphi 7-XE.
2019-11-09 15:57:29 +01:00

267 lines
7.3 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 © 2019 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 uCEFFMXWorkScheduler;
{$IFNDEF CPUX64}{$ALIGN ON}{$ENDIF}
{$MINENUMSIZE 4}
{$I cef.inc}
interface
uses
System.Classes, System.Types,
FMX.Types, FMX.Controls,
uCEFConstants, uCEFWorkSchedulerThread;
type
{$IFNDEF FPC}{$IFDEF DELPHI16_UP}[ComponentPlatformsAttribute(pidWin32 or pidWin64)]{$ENDIF}{$ENDIF}
TFMXWorkScheduler = class(TComponent)
protected
FThread : TCEFWorkSchedulerThread;
FDepleteWorkCycles : cardinal;
FDepleteWorkDelay : cardinal;
FDefaultInterval : integer;
FStopped : boolean;
{$IFDEF MSWINDOWS}
{$WARN SYMBOL_PLATFORM OFF}
FPriority : TThreadPriority;
{$WARN SYMBOL_PLATFORM ON}
{$ENDIF}
procedure CreateThread;
procedure DestroyThread;
procedure DepleteWork;
procedure NextPulse(aInterval : integer);
procedure DoWork;
procedure DoMessageLoopWork;
procedure SetDefaultInterval(aValue : integer);
{$IFDEF MSWINDOWS}
{$WARN SYMBOL_PLATFORM OFF}
procedure SetPriority(aValue : TThreadPriority);
{$WARN SYMBOL_PLATFORM ON}
{$ENDIF}
procedure Thread_OnPulse(Sender : TObject);
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure AfterConstruction; override;
procedure ScheduleMessagePumpWork(const delay_ms : int64);
procedure StopScheduler;
procedure ScheduleWork(const delay_ms : int64);
published
{$IFDEF MSWINDOWS}
{$WARN SYMBOL_PLATFORM OFF}
property Priority : TThreadPriority read FPriority write SetPriority default tpNormal;
{$WARN SYMBOL_PLATFORM ON}
{$ENDIF}
property DefaultInterval : integer read FDefaultInterval write SetDefaultInterval default CEF_TIMER_MAXDELAY;
property DepleteWorkCycles : cardinal read FDepleteWorkCycles write FDepleteWorkCycles default CEF_TIMER_DEPLETEWORK_CYCLES;
property DepleteWorkDelay : cardinal read FDepleteWorkDelay write FDepleteWorkDelay default CEF_TIMER_DEPLETEWORK_DELAY;
end;
var
GlobalFMXWorkScheduler : TFMXWorkScheduler = nil;
procedure DestroyGlobalFMXWorkScheduler;
implementation
uses
{$IFDEF MSWINDOWS}WinApi.Windows,{$ENDIF} System.SysUtils, System.Math,
FMX.Platform, FMX.Platform.Win, FMX.Forms,
uCEFMiscFunctions, uCEFApplicationCore;
procedure DestroyGlobalFMXWorkScheduler;
begin
if (GlobalFMXWorkScheduler <> nil) then FreeAndNil(GlobalFMXWorkScheduler);
end;
constructor TFMXWorkScheduler.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FThread := nil;
FStopped := False;
{$IFDEF MSWINDOWS}
{$WARN SYMBOL_PLATFORM OFF}
FPriority := tpNormal;
{$WARN SYMBOL_PLATFORM ON}
{$ENDIF}
FDefaultInterval := CEF_TIMER_MAXDELAY;
FDepleteWorkCycles := CEF_TIMER_DEPLETEWORK_CYCLES;
FDepleteWorkDelay := CEF_TIMER_DEPLETEWORK_DELAY;
end;
destructor TFMXWorkScheduler.Destroy;
begin
DestroyThread;
inherited Destroy;
end;
procedure TFMXWorkScheduler.AfterConstruction;
begin
inherited AfterConstruction;
if not(csDesigning in ComponentState) then CreateThread;
end;
procedure TFMXWorkScheduler.CreateThread;
begin
FThread := TCEFWorkSchedulerThread.Create;
{$IFDEF MSWINDOWS}
FThread.Priority := FPriority;
{$ENDIF}
FThread.DefaultInterval := FDefaultInterval;
FThread.OnPulse := Thread_OnPulse;
FThread.Start;
end;
procedure TFMXWorkScheduler.DestroyThread;
begin
try
if (FThread <> nil) then
begin
FThread.Terminate;
FThread.NextPulse(0);
FThread.WaitFor;
FreeAndNil(FThread);
end;
except
on e : exception do
if CustomExceptionHandler('TFMXWorkScheduler.DestroyThread', e) then raise;
end;
end;
procedure TFMXWorkScheduler.DoMessageLoopWork;
begin
if (GlobalCEFApp <> nil) then GlobalCEFApp.DoMessageLoopWork;
end;
procedure TFMXWorkScheduler.SetDefaultInterval(aValue : integer);
begin
FDefaultInterval := aValue;
if (FThread <> nil) then FThread.DefaultInterval := aValue;
end;
{$IFDEF MSWINDOWS}
{$WARN SYMBOL_PLATFORM OFF}
procedure TFMXWorkScheduler.SetPriority(aValue : TThreadPriority);
begin
FPriority := aValue;
if (FThread <> nil) then FThread.Priority := aValue;
end;
{$WARN SYMBOL_PLATFORM ON}
{$ENDIF}
procedure TFMXWorkScheduler.DepleteWork;
var
i : cardinal;
begin
i := FDepleteWorkCycles;
while (i > 0) do
begin
DoMessageLoopWork;
Sleep(FDepleteWorkDelay);
dec(i);
end;
end;
procedure TFMXWorkScheduler.ScheduleMessagePumpWork(const delay_ms : int64);
{$IFDEF MSWINDOWS}
var
TempHandle : HWND;
{$ENDIF}
begin
if not(FStopped) then
begin
{$IFDEF MSWINDOWS}
if (Application <> nil) and (Application.MainForm <> nil) then
TempHandle := FmxHandleToHWND(Application.MainForm.Handle)
else
TempHandle := 0;
if (TempHandle <> 0) then
WinApi.Windows.PostMessage(TempHandle, CEF_PUMPHAVEWORK, 0, LPARAM(delay_ms));
{$ENDIF}
end;
end;
procedure TFMXWorkScheduler.StopScheduler;
begin
FStopped := True;
NextPulse(0);
DepleteWork;
end;
procedure TFMXWorkScheduler.Thread_OnPulse(Sender: TObject);
begin
if not(FStopped) then DoMessageLoopWork;
end;
procedure TFMXWorkScheduler.DoWork;
begin
DoMessageLoopWork;
NextPulse(FDefaultInterval);
end;
procedure TFMXWorkScheduler.ScheduleWork(const delay_ms : int64);
begin
if not(FStopped) then
begin
if (delay_ms <= 0) then
DoWork
else
NextPulse(delay_ms);
end;
end;
procedure TFMXWorkScheduler.NextPulse(aInterval : integer);
begin
if (FThread <> nil) then FThread.NextPulse(aInterval);
end;
end.