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Added ConsoleBrowser2 and WebpageSnapshot demos

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- Split the Lazarus demos directory into "Lazarus_Windows" and "Lazarus_Linux".
- Added OSRExternalPumpBrowser and TinyBrowser2 demos to "Lazarus_Linux".
- Set TBufferPanel.GetScreenScale as virtual.
- Added DevTools to the SchemeRegistrationBrowser demo.
- Modified the SchemeRegistrationBrowser demo to receive XMLHttpRequest requests from JavaScript.
This commit is contained in:
Salvador Diaz Fau
2020-12-13 18:36:10 +01:00
parent 8f55182540
commit 1299a6f596
390 changed files with 12796 additions and 370 deletions
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18
demos/Delphi_VCL/ConsoleBrowser2/00-DeleteDCUs.bat Normal file
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del /s /q *.dcu
del /s /q *.exe
del /s /q *.res
del /s /q *.rsm
del /s /q *.log
del /s /q *.dsk
del /s /q *.identcache
del /s /q *.stat
del /s /q *.local
del /s /q *.~*
rmdir Win32\Debug
rmdir Win32\Release
rmdir Win32
rmdir Win64\Debug
rmdir Win64\Release
rmdir Win64
rmdir __history
rmdir __recovery

114
demos/Delphi_VCL/ConsoleBrowser2/ConsoleBrowser2.dpr Normal file
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// ************************************************************************
// ***************************** 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.
*
*)
program ConsoleBrowser2;
{$I cef.inc}
{$APPTYPE CONSOLE}
{$R *.res}
uses
{$IFDEF DELPHI16_UP}
System.SysUtils,
{$ELSE}
SysUtils,
{$ENDIF}
uCEFApplication,
uEncapsulatedBrowser in 'uEncapsulatedBrowser.pas',
uCEFBrowserThread in 'uCEFBrowserThread.pas';
{$IFDEF WIN32}
// CEF3 needs to set the LARGEADDRESSAWARE ($20) flag which allows 32-bit processes to use up to 3GB of RAM.
{$SetPEFlags $20}
{$ENDIF}
// This demo navigates to a webpage, captures the browser screen and saves it as a bitmap file called "snapshot.bmp"
// ConsoleBrowser2 is a console application without a user interface. For this reason the browser is in
// "off-screen mode" (OSR mode), it's encamsulated in a custom thread and it uses a different EXE for the
// CEF subprocesses (ConsoleBrowser2_sp.exe).
// While the custom browser thread is loading the webpage and capturing the screen, the console application is
// waiting for an Event.
// ConsoleBrowser2 reads the "/url" parameter and uses that URL to navigate and capture the screen.
// For example : ConsoleBrowser2.exe /url=https://www.briskbard.com
// If you need to debug this demo in Delphi using http://www.example.com click on the "Run->Parameters" menu option,
// select the right target (Windows 32 bits / Windows 64 bits) and type "/url=http://www.example.com" (without quotes)
// in the "Parameters" box.
// By default the browser uses a virtual screen size of 1024x728 with 96 DPI (screen scale = 1)
// If you need a different resolution or scale just edit those values in TEncapsulatedBrowser.Create
// or add new command line switches with the new information.
// The browser captures the screen when the main frame is loaded but some web pages need some extra time to finish.
// This demo uses a 500 ms delay to avoid this problem and you can modify this value in TEncapsulatedBrowser.Create
// CEF is configured in this demo to use "in memory" cache. As a result of this, the browser will always download
// all the web page resources. Remember that if you switch to a local directory for the cache you will have problems
// when you run several instances of this demo at the same time because Chromium doesn't allow sharing the same cache
// by different processes.
// This demo is configured to load the CEF binaries in the same directory were ConsoleBrowser2.exe is located but you
// can set a different directory for the binaries by setting the GlobalCEFApp.FrameworkDirPath,
// GlobalCEFApp.ResourcesDirPath and GlobalCEFApp.LocalesDirPath properties inside CreateGlobalCEFApp.
// See the SimpleBrowser2 demo for more details.
// CEF is configured to use ConsoleBrowser2_sp.exe for the subprocesses and it tries to find it in the same directory as
// ConsoleBrowser2.exe but it's possible to use a different location for that EXE if you set a custom path in
// GlobalCEFApp.BrowserSubprocessPath.
// Most of the GlobalCEFApp properties must be the same in the main EXE and the EXE for the subprocesses. If you modify
// them in CreateGlobalCEFApp then you'll also have to copy those property values in ConsoleBrowser2_sp.dpr
// See the "SubProcess" demo for more details.
begin
try
try
CreateGlobalCEFApp;
if WaitForMainAppEvent then
WriteResult;
except
on E: Exception do
Writeln(E.ClassName, ': ', E.Message);
end;
finally
DestroyGlobalCEFApp;
end;
end.

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demos/Delphi_VCL/ConsoleBrowser2/ConsoleBrowser2.dproj Normal file
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demos/Delphi_VCL/ConsoleBrowser2/ConsoleBrowser2Grp.groupproj Normal file
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<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup>
<ProjectGuid>{B3B59DC2-AFE8-41F8-81CF-6F7882A9E196}</ProjectGuid>
</PropertyGroup>
<ItemGroup>
<Projects Include="ConsoleBrowser2.dproj">
<Dependencies/>
</Projects>
<Projects Include="ConsoleBrowser2_sp.dproj">
<Dependencies/>
</Projects>
</ItemGroup>
<ProjectExtensions>
<Borland.Personality>Default.Personality.12</Borland.Personality>
<Borland.ProjectType/>
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<Default.Personality/>
</BorlandProject>
</ProjectExtensions>
<Target Name="ConsoleBrowser2">
<MSBuild Projects="ConsoleBrowser2.dproj"/>
</Target>
<Target Name="ConsoleBrowser2:Clean">
<MSBuild Projects="ConsoleBrowser2.dproj" Targets="Clean"/>
</Target>
<Target Name="ConsoleBrowser2:Make">
<MSBuild Projects="ConsoleBrowser2.dproj" Targets="Make"/>
</Target>
<Target Name="ConsoleBrowser2_sp">
<MSBuild Projects="ConsoleBrowser2_sp.dproj"/>
</Target>
<Target Name="ConsoleBrowser2_sp:Clean">
<MSBuild Projects="ConsoleBrowser2_sp.dproj" Targets="Clean"/>
</Target>
<Target Name="ConsoleBrowser2_sp:Make">
<MSBuild Projects="ConsoleBrowser2_sp.dproj" Targets="Make"/>
</Target>
<Target Name="Build">
<CallTarget Targets="ConsoleBrowser2;ConsoleBrowser2_sp"/>
</Target>
<Target Name="Clean">
<CallTarget Targets="ConsoleBrowser2:Clean;ConsoleBrowser2_sp:Clean"/>
</Target>
<Target Name="Make">
<CallTarget Targets="ConsoleBrowser2:Make;ConsoleBrowser2_sp:Make"/>
</Target>
<Import Project="$(BDS)\Bin\CodeGear.Group.Targets" Condition="Exists('$(BDS)\Bin\CodeGear.Group.Targets')"/>
</Project>

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demos/Delphi_VCL/ConsoleBrowser2/ConsoleBrowser2_sp.dpr Normal file
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// ************************************************************************
// ***************************** CEF4Delphi *******************************
// ************************************************************************
//
// CEF4Delphi is based on DCEF3 which uses CEF3 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 � 2018 Salvador D�az 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.
*
*)
program ConsoleBrowser2_sp;
{$I cef.inc}
uses
uCEFApplicationCore;
{$IFDEF WIN32}
// CEF3 needs to set the LARGEADDRESSAWARE ($20) flag which allows 32-bit processes to use up to 3GB of RAM.
{$SetPEFlags $20}
{$ENDIF}
begin
GlobalCEFApp := TCefApplicationCore.Create;
GlobalCEFApp.WindowlessRenderingEnabled := True;
GlobalCEFApp.EnableHighDPISupport := True;
GlobalCEFApp.ShowMessageDlg := False;
GlobalCEFApp.BlinkSettings := 'hideScrollbars';
GlobalCEFApp.StartSubProcess;
DestroyGlobalCEFApp;
end.

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demos/Delphi_VCL/ConsoleBrowser2/cef.inc Normal file
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// ************************************************************************
// ***************************** CEF4Delphi *******************************
// ************************************************************************
//
// CEF4Delphi is based on DCEF3 which uses CEF3 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 � 2017 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.
*
*)
// The complete list of compiler versions is here :
// http://docwiki.embarcadero.com/RADStudio/Tokyo/en/Compiler_Versions
{$DEFINE DELPHI_VERSION_UNKNOW}
// Delphi 5
{$IFDEF VER130}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$ENDIF}
// Delphi 6
{$IFDEF VER140}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$ENDIF}
// Delphi 7
{$IFDEF VER150}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$ENDIF}
// Delphi 8
{$IFDEF VER160}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$ENDIF}
// Delphi 2005
{$IFDEF VER170}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$ENDIF}
{$IFDEF VER180}
{$UNDEF DELPHI_VERSION_UNKNOW}
// Delphi 2007
{$IFDEF VER185}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
// Delphi 2006
{$ELSE}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$ENDIF}
{$ENDIF}
// Delphi 2009
{$IFDEF VER200}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$ENDIF}
//Delphi 2010
{$IFDEF VER210}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$DEFINE DELPHI14_UP}
{$ENDIF}
// Delphi XE
{$IFDEF VER220}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$DEFINE DELPHI14_UP}
{$DEFINE DELPHI15_UP}
{$ENDIF}
// Delphi XE2 (First FireMonkey and 64bit compiler)
{$IFDEF VER230}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$DEFINE DELPHI14_UP}
{$DEFINE DELPHI15_UP}
{$DEFINE DELPHI16_UP}
{$ENDIF}
// Delphi XE3
{$IFDEF VER240}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$DEFINE DELPHI14_UP}
{$DEFINE DELPHI15_UP}
{$DEFINE DELPHI16_UP}
{$DEFINE DELPHI17_UP}
{$ENDIF}
// Delphi XE4
{$IFDEF VER250}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$DEFINE DELPHI14_UP}
{$DEFINE DELPHI15_UP}
{$DEFINE DELPHI16_UP}
{$DEFINE DELPHI17_UP}
{$DEFINE DELPHI18_UP}
{$ENDIF}
// Delphi XE5
{$IFDEF VER260}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$DEFINE DELPHI14_UP}
{$DEFINE DELPHI15_UP}
{$DEFINE DELPHI16_UP}
{$DEFINE DELPHI17_UP}
{$DEFINE DELPHI18_UP}
{$DEFINE DELPHI19_UP}
{$ENDIF}
// Delphi XE6
{$IFDEF VER270}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$DEFINE DELPHI14_UP}
{$DEFINE DELPHI15_UP}
{$DEFINE DELPHI16_UP}
{$DEFINE DELPHI17_UP}
{$DEFINE DELPHI18_UP}
{$DEFINE DELPHI19_UP}
{$DEFINE DELPHI20_UP}
{$ENDIF}
// Delphi XE7
{$IFDEF VER280}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$DEFINE DELPHI14_UP}
{$DEFINE DELPHI15_UP}
{$DEFINE DELPHI16_UP}
{$DEFINE DELPHI17_UP}
{$DEFINE DELPHI18_UP}
{$DEFINE DELPHI19_UP}
{$DEFINE DELPHI20_UP}
{$DEFINE DELPHI21_UP}
{$ENDIF}
// Delphi XE8
{$IFDEF VER290}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$DEFINE DELPHI14_UP}
{$DEFINE DELPHI15_UP}
{$DEFINE DELPHI16_UP}
{$DEFINE DELPHI17_UP}
{$DEFINE DELPHI18_UP}
{$DEFINE DELPHI19_UP}
{$DEFINE DELPHI20_UP}
{$DEFINE DELPHI21_UP}
{$DEFINE DELPHI22_UP}
{$ENDIF VER290}
// Rad Studio 10 - Delphi Seattle
{$IFDEF VER300}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$DEFINE DELPHI14_UP}
{$DEFINE DELPHI15_UP}
{$DEFINE DELPHI16_UP}
{$DEFINE DELPHI17_UP}
{$DEFINE DELPHI18_UP}
{$DEFINE DELPHI19_UP}
{$DEFINE DELPHI20_UP}
{$DEFINE DELPHI21_UP}
{$DEFINE DELPHI22_UP}
{$DEFINE DELPHI23_UP}
{$ENDIF}
// Rad Studio 10.1 - Delphi Berlin
{$IFDEF VER310}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$DEFINE DELPHI14_UP}
{$DEFINE DELPHI15_UP}
{$DEFINE DELPHI16_UP}
{$DEFINE DELPHI17_UP}
{$DEFINE DELPHI18_UP}
{$DEFINE DELPHI19_UP}
{$DEFINE DELPHI20_UP}
{$DEFINE DELPHI21_UP}
{$DEFINE DELPHI22_UP}
{$DEFINE DELPHI23_UP}
{$DEFINE DELPHI24_UP}
{$ENDIF}
// Rad Studio 10.2 - Delphi Tokyo
{$IFDEF VER320}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$DEFINE DELPHI14_UP}
{$DEFINE DELPHI15_UP}
{$DEFINE DELPHI16_UP}
{$DEFINE DELPHI17_UP}
{$DEFINE DELPHI18_UP}
{$DEFINE DELPHI19_UP}
{$DEFINE DELPHI20_UP}
{$DEFINE DELPHI21_UP}
{$DEFINE DELPHI22_UP}
{$DEFINE DELPHI23_UP}
{$DEFINE DELPHI24_UP}
{$DEFINE DELPHI25_UP}
{$ENDIF}
// Rad Studio 10.3 - Delphi Rio
{$IFDEF VER330}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$DEFINE DELPHI14_UP}
{$DEFINE DELPHI15_UP}
{$DEFINE DELPHI16_UP}
{$DEFINE DELPHI17_UP}
{$DEFINE DELPHI18_UP}
{$DEFINE DELPHI19_UP}
{$DEFINE DELPHI20_UP}
{$DEFINE DELPHI21_UP}
{$DEFINE DELPHI22_UP}
{$DEFINE DELPHI23_UP}
{$DEFINE DELPHI24_UP}
{$DEFINE DELPHI25_UP}
{$DEFINE DELPHI26_UP}
{$ENDIF}
// Rad Studio 10.4 - Delphi Sydney
{$IFDEF VER340}
{$UNDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$DEFINE DELPHI14_UP}
{$DEFINE DELPHI15_UP}
{$DEFINE DELPHI16_UP}
{$DEFINE DELPHI17_UP}
{$DEFINE DELPHI18_UP}
{$DEFINE DELPHI19_UP}
{$DEFINE DELPHI20_UP}
{$DEFINE DELPHI21_UP}
{$DEFINE DELPHI22_UP}
{$DEFINE DELPHI23_UP}
{$DEFINE DELPHI24_UP}
{$DEFINE DELPHI25_UP}
{$DEFINE DELPHI26_UP}
{$DEFINE DELPHI27_UP}
{$ENDIF}
{$IFDEF FPC}
{$DEFINE SUPPORTS_INLINE}
{$IF DEFINED(FPC_FULLVERSION) AND (FPC_FULLVERSION >= 30200)}
{$DEFINE FPC_VER_320}
{$IFEND}
{$ELSE}
{$IFDEF DELPHI_VERSION_UNKNOW}
{$DEFINE DELPHI5_UP}
{$DEFINE DELPHI6_UP}
{$DEFINE DELPHI7_UP}
{$DEFINE DELPHI8_UP}
{$DEFINE DELPHI9_UP}
{$DEFINE DELPHI10_UP}
{$DEFINE DELPHI11_UP}
{$DEFINE DELPHI12_UP}
{$DEFINE DELPHI14_UP}
{$DEFINE DELPHI15_UP}
{$DEFINE DELPHI16_UP}
{$DEFINE DELPHI17_UP}
{$DEFINE DELPHI18_UP}
{$DEFINE DELPHI19_UP}
{$DEFINE DELPHI20_UP}
{$DEFINE DELPHI21_UP}
{$DEFINE DELPHI22_UP}
{$DEFINE DELPHI23_UP}
{$DEFINE DELPHI24_UP}
{$DEFINE DELPHI25_UP}
{$DEFINE DELPHI26_UP}
{$DEFINE DELPHI27_UP}
{$ENDIF}
{$ENDIF}
{$IFDEF DELPHI9_UP}
{$DEFINE SUPPORTS_INLINE}
{$ENDIF}
{$IF DEFINED(CPUX32) OR
DEFINED(CPU386) OR
DEFINED(CPUi386) OR
DEFINED(CPUPOWERPC32) OR
DEFINED(CPUSPARC32) OR
DEFINED(CPU32BITS) OR
DEFINED(CPUARM32) OR
DEFINED(WIN32) OR
DEFINED(IOS32) OR
DEFINED(MACOS32) OR
DEFINED(LINUX32) OR
DEFINED(POSIX32) OR
DEFINED(ANDROID32)}
{$DEFINE TARGET_32BITS}
{$IFEND}

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demos/Delphi_VCL/ConsoleBrowser2/uCEFBrowserThread.pas Normal file
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// ************************************************************************
// ***************************** 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 uCEFBrowserThread;
{$I cef.inc}
interface
uses
{$IFDEF DELPHI16_UP}
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Classes, Vcl.Graphics, System.SyncObjs, System.Math,
{$ELSE}
Windows, Messages, SysUtils, Classes, Graphics, SyncObjs, Math,
{$ENDIF}
uCEFChromium, uCEFTypes, uCEFInterfaces, uCEFConstants, uCEFBufferPanel, uCEFChromiumCore, uCEFMiscFunctions;
type
TVirtualBufferPanel = class(TBufferPanel)
protected
FCustomScale : single;
function GetScreenScale : single; override;
public
property CustomScale : single read FCustomScale write FCustomScale;
end;
TCEFBrowserThread = class(TThread)
protected
FBrowser : TChromium;
FPanel : TVirtualBufferPanel;
FPanelSize : TSize;
FScreenScale : single;
FPopUpBitmap : TBitmap;
FPopUpRect : TRect;
FResizeCS : TCriticalSection;
FBrowserInfoCS : TCriticalSection;
FShowPopUp : boolean;
FClosing : boolean;
FResizing : boolean;
FPendingResize : boolean;
FInitialized : boolean;
FDefaultURL : ustring;
FSnapshot : TBitmap;
FDelayMs : integer;
FOnSnapshotAvailable : TNotifyEvent;
FOnError : TNotifyEvent;
FErrorCode : integer;
FErrorText : ustring;
FFailedUrl : ustring;
FPendingUrl : ustring;
function GetErrorCode : integer;
function GetErrorText : ustring;
function GetFailedUrl : ustring;
function GetInitialized : boolean;
procedure Panel_OnResize(Sender: TObject);
procedure Browser_OnAfterCreated(Sender: TObject; const browser: ICefBrowser);
procedure Browser_OnPaint(Sender: TObject; const browser: ICefBrowser; kind: TCefPaintElementType; dirtyRectsCount: NativeUInt; const dirtyRects: PCefRectArray; const buffer: Pointer; width, height: Integer);
procedure Browser_OnGetViewRect(Sender: TObject; const browser: ICefBrowser; var rect: TCefRect);
procedure Browser_OnGetScreenPoint(Sender: TObject; const browser: ICefBrowser; viewX, viewY: Integer; var screenX, screenY: Integer; out Result: Boolean);
procedure Browser_OnGetScreenInfo(Sender: TObject; const browser: ICefBrowser; var screenInfo: TCefScreenInfo; out Result: Boolean);
procedure Browser_OnPopupShow(Sender: TObject; const browser: ICefBrowser; show: Boolean);
procedure Browser_OnPopupSize(Sender: TObject; const browser: ICefBrowser; const rect: PCefRect);
procedure Browser_OnBeforePopup(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; const targetUrl, targetFrameName: ustring; targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean; const popupFeatures: TCefPopupFeatures; var windowInfo: TCefWindowInfo; var client: ICefClient; var settings: TCefBrowserSettings; var extra_info: ICefDictionaryValue; var noJavascriptAccess: Boolean; var Result: Boolean);
procedure Browser_OnBeforeClose(Sender: TObject; const browser: ICefBrowser);
procedure Browser_OnLoadError(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; errorCode: Integer; const errorText, failedUrl: ustring);
procedure Browser_OnLoadingStateChange(Sender: TObject; const browser: ICefBrowser; isLoading, canGoBack, canGoForward: Boolean);
procedure Resize;
function CreateBrowser : boolean;
procedure TakeSnapshot;
procedure CloseBrowser;
procedure DoOnError;
procedure InitError;
procedure WebpagePostProcessing;
procedure LoadPendingURL;
procedure Execute; override;
public
constructor Create(const aDefaultURL : ustring; aWidth, aHeight : integer; aDelayMs : integer = 500; const aScreenScale : single = 1);
destructor Destroy; override;
procedure AfterConstruction; override;
function TerminateBrowserThread : boolean;
function CopySnapshot(var aSnapshot : TBitmap) : boolean;
function SaveSnapshotToFile(const aPath : ustring) : boolean;
procedure LoadUrl(const aURL : ustring);
property ErrorCode : integer read GetErrorCode;
property ErrorText : ustring read GetErrorText;
property FailedUrl : ustring read GetFailedUrl;
property Initialized : boolean read GetInitialized;
property OnSnapshotAvailable : TNotifyEvent read FOnSnapshotAvailable write FOnSnapshotAvailable;
property OnError : TNotifyEvent read FOnError write FOnError;
end;
implementation
const
CEF_WEBPAGE_LOADED_MSG = WM_APP + 1;
CEF_WEBPAGE_ERROR_MSG = WM_APP + 2;
CEF_CLOSE_BROWSER_MSG = WM_APP + 3;
CEF_LOAD_PENDING_URL_MSG = WM_APP + 4;
// *************************************
// ******** TVirtualBufferPanel ********
// *************************************
function TVirtualBufferPanel.GetScreenScale : single;
begin
Result := FCustomScale;
end;
// *************************************
// ********* TCEFBrowserThread *********
// *************************************
constructor TCEFBrowserThread.Create(const aDefaultURL : ustring; aWidth, aHeight, aDelayMs : integer; const aScreenScale : single);
begin
inherited Create(True);
FreeOnTerminate := False;
FInitialized := False;
FBrowser := nil;
FPanel := nil;
FPanelSize.cx := aWidth;
FPanelSize.cy := aHeight;
FScreenScale := aScreenScale;
FDefaultURL := aDefaultURL;
FPopUpBitmap := nil;
FPopUpRect := rect(0, 0, 0, 0);
FShowPopUp := False;
FResizing := False;
FPendingResize := False;
FResizeCS := nil;
FBrowserInfoCS := nil;
FSnapshot := nil;
FDelayMs := aDelayMs;
FOnSnapshotAvailable := nil;
FOnError := nil;
FClosing := False;
end;
destructor TCEFBrowserThread.Destroy;
begin
if (FBrowser <> nil) then
FreeAndNil(FBrowser);
if (FPanel <> nil) then
FreeAndNil(FPanel);
if (FPopUpBitmap <> nil) then
FreeAndNil(FPopUpBitmap);
if (FSnapshot <> nil) then
FreeAndNil(FSnapshot);
if (FResizeCS <> nil) then
FreeAndNil(FResizeCS);
if (FBrowserInfoCS <> nil) then
FreeAndNil(FBrowserInfoCS);
inherited Destroy;
end;
procedure TCEFBrowserThread.AfterConstruction;
begin
inherited AfterConstruction;
FResizeCS := TCriticalSection.Create;
FBrowserInfoCS := TCriticalSection.Create;
FPanel := TVirtualBufferPanel.Create(nil);
FPanel.CustomScale := FScreenScale;
FPanel.Width := FPanelSize.cx;
FPanel.Height := FPanelSize.cy;
FPanel.OnResize := Panel_OnResize;
FBrowser := TChromium.Create(nil);
FBrowser.DefaultURL := FDefaultURL;
FBrowser.Options.BackgroundColor := CefColorSetARGB($FF, $FF, $FF, $FF);
FBrowser.OnAfterCreated := Browser_OnAfterCreated;
FBrowser.OnPaint := Browser_OnPaint;
FBrowser.OnGetViewRect := Browser_OnGetViewRect;
FBrowser.OnGetScreenPoint := Browser_OnGetScreenPoint;
FBrowser.OnGetScreenInfo := Browser_OnGetScreenInfo;
FBrowser.OnPopupShow := Browser_OnPopupShow;
FBrowser.OnPopupSize := Browser_OnPopupSize;
FBrowser.OnBeforePopup := Browser_OnBeforePopup;
FBrowser.OnBeforeClose := Browser_OnBeforeClose;
FBrowser.OnLoadError := Browser_OnLoadError;
FBrowser.OnLoadingStateChange := Browser_OnLoadingStateChange;
end;
function TCEFBrowserThread.GetErrorCode : integer;
begin
FBrowserInfoCS.Acquire;
Result := FErrorCode;
FBrowserInfoCS.Release;
end;
function TCEFBrowserThread.GetErrorText : ustring;
begin
FBrowserInfoCS.Acquire;
Result := FErrorText;
FBrowserInfoCS.Release;
end;
function TCEFBrowserThread.GetFailedUrl : ustring;
begin
FBrowserInfoCS.Acquire;
Result := FFailedUrl;
FBrowserInfoCS.Release;
end;
function TCEFBrowserThread.GetInitialized : boolean;
begin
Result := False;
if assigned(FBrowserInfoCS) and assigned(FBrowser) then
try
FBrowserInfoCS.Acquire;
Result := FInitialized and FBrowser.Initialized;
finally
FBrowserInfoCS.Release;
end;
end;
function TCEFBrowserThread.CopySnapshot(var aSnapshot : TBitmap) : boolean;
begin
Result := False;
if FClosing or Terminated or (FBrowserInfoCS = nil) then exit;
try
try
FBrowserInfoCS.Acquire;
if assigned(FSnapshot) and not(FSnapshot.Empty) then
begin
if (aSnapshot = nil) then
begin
aSnapshot := TBitmap.Create;
aSnapshot.PixelFormat := pf32bit;
aSnapshot.HandleType := bmDIB;
aSnapshot.Width := FSnapshot.Width;
aSnapshot.Height := FSnapshot.Height;
end;
aSnapshot.Assign(FSnapshot);
Result := True;
end;
except
on e : exception do
if CustomExceptionHandler('TCEFBrowserThread.CopySnapshot', e) then raise;
end;
finally
FBrowserInfoCS.Release;
end;
end;
function TCEFBrowserThread.SaveSnapshotToFile(const aPath : ustring) : boolean;
begin
Result := False;
if (FBrowserInfoCS = nil) then exit;
try
try
FBrowserInfoCS.Acquire;
if assigned(FSnapshot) and not(FSnapshot.Empty) then
begin
FSnapshot.SaveToFile(aPath);
Result := True;
end;
except
on e : exception do
if CustomExceptionHandler('TCEFBrowserThread.SaveSnapshotToFile', e) then raise;
end;
finally
FBrowserInfoCS.Release;
end;
end;
procedure TCEFBrowserThread.LoadUrl(const aURL : ustring);
begin
if FClosing or Terminated or (FBrowserInfoCS = nil) then
exit;
if Initialized then
try
FBrowserInfoCS.Acquire;
FPendingUrl := aURL;
PostThreadMessage(ThreadID, CEF_LOAD_PENDING_URL_MSG, 0, 0);
finally
FBrowserInfoCS.Release;
end;
end;
function TCEFBrowserThread.TerminateBrowserThread : boolean;
begin
Result := Initialized and
PostThreadMessage(ThreadID, CEF_CLOSE_BROWSER_MSG, 0, 0);
end;
procedure TCEFBrowserThread.Panel_OnResize(Sender: TObject);
begin
Resize;
end;
procedure TCEFBrowserThread.Browser_OnAfterCreated(Sender: TObject; const browser: ICefBrowser);
begin
FBrowserInfoCS.Acquire;
FInitialized := True;
FBrowserInfoCS.Release;
end;
procedure TCEFBrowserThread.Browser_OnPaint(Sender: TObject; const browser: ICefBrowser; kind: TCefPaintElementType; dirtyRectsCount: NativeUInt; const dirtyRects: PCefRectArray; const buffer: Pointer; width, height: Integer);
var
src, dst: PByte;
i, j, TempLineSize, TempSrcOffset, TempDstOffset, SrcStride, DstStride : Integer;
n : NativeUInt;
TempWidth, TempHeight, TempScanlineSize : integer;
TempBufferBits : Pointer;
TempForcedResize : boolean;
TempSrcRect : TRect;
begin
try
FResizeCS.Acquire;
TempForcedResize := False;
if FPanel.BeginBufferDraw then
begin
if (kind = PET_POPUP) then
begin
if (FPopUpBitmap = nil) or
(width <> FPopUpBitmap.Width) or
(height <> FPopUpBitmap.Height) then
begin
if (FPopUpBitmap <> nil) then FPopUpBitmap.Free;
FPopUpBitmap := TBitmap.Create;
FPopUpBitmap.PixelFormat := pf32bit;
FPopUpBitmap.HandleType := bmDIB;
FPopUpBitmap.Width := width;
FPopUpBitmap.Height := height;
end;
TempWidth := FPopUpBitmap.Width;
TempHeight := FPopUpBitmap.Height;
TempScanlineSize := FPopUpBitmap.Width * SizeOf(TRGBQuad);
TempBufferBits := FPopUpBitmap.Scanline[pred(FPopUpBitmap.Height)];
end
else
begin
TempForcedResize := FPanel.UpdateBufferDimensions(Width, Height) or not(FPanel.BufferIsResized(False));
TempWidth := FPanel.BufferWidth;
TempHeight := FPanel.BufferHeight;
TempScanlineSize := FPanel.ScanlineSize;
TempBufferBits := FPanel.BufferBits;
end;
if (TempBufferBits <> nil) then
begin
SrcStride := Width * SizeOf(TRGBQuad);
DstStride := - TempScanlineSize;
n := 0;
while (n < dirtyRectsCount) do
begin
if (dirtyRects[n].x >= 0) and (dirtyRects[n].y >= 0) then
begin
TempLineSize := min(dirtyRects[n].width, TempWidth - dirtyRects[n].x) * SizeOf(TRGBQuad);
if (TempLineSize > 0) then
begin
TempSrcOffset := ((dirtyRects[n].y * Width) + dirtyRects[n].x) * SizeOf(TRGBQuad);
TempDstOffset := ((TempScanlineSize * pred(TempHeight)) - (dirtyRects[n].y * TempScanlineSize)) +
(dirtyRects[n].x * SizeOf(TRGBQuad));
src := @PByte(buffer)[TempSrcOffset];
dst := @PByte(TempBufferBits)[TempDstOffset];
i := 0;
j := min(dirtyRects[n].height, TempHeight - dirtyRects[n].y);
while (i < j) do
begin
Move(src^, dst^, TempLineSize);
Inc(dst, DstStride);
Inc(src, SrcStride);
inc(i);
end;
end;
end;
inc(n);
end;
if FShowPopup and (FPopUpBitmap <> nil) then
begin
TempSrcRect := Rect(0, 0,
min(FPopUpRect.Right - FPopUpRect.Left, FPopUpBitmap.Width),
min(FPopUpRect.Bottom - FPopUpRect.Top, FPopUpBitmap.Height));
FPanel.BufferDraw(FPopUpBitmap, TempSrcRect, FPopUpRect);
end;
end;
FPanel.EndBufferDraw;
if (kind = PET_VIEW) then
begin
if TempForcedResize or FPendingResize then
PostThreadMessage(ThreadID, CEF_PENDINGRESIZE, 0, 0);
FResizing := False;
FPendingResize := False;
end;
end;
finally
FResizeCS.Release;
end;
end;
procedure TCEFBrowserThread.Browser_OnGetViewRect(Sender: TObject; const browser: ICefBrowser; var rect: TCefRect);
begin
rect.x := 0;
rect.y := 0;
rect.width := DeviceToLogical(FPanel.Width, FScreenScale);
rect.height := DeviceToLogical(FPanel.Height, FScreenScale);
end;
procedure TCEFBrowserThread.Browser_OnGetScreenPoint(Sender: TObject; const browser: ICefBrowser; viewX, viewY: Integer; var screenX, screenY: Integer; out Result: Boolean);
begin
screenX := LogicalToDevice(viewX, FScreenScale);
screenY := LogicalToDevice(viewY, FScreenScale);
Result := True;
end;
procedure TCEFBrowserThread.Browser_OnGetScreenInfo(Sender: TObject; const browser: ICefBrowser; var screenInfo: TCefScreenInfo; out Result: Boolean);
var
TempRect : TCEFRect;
begin
TempRect.x := 0;
TempRect.y := 0;
TempRect.width := DeviceToLogical(FPanel.Width, FScreenScale);
TempRect.height := DeviceToLogical(FPanel.Height, FScreenScale);
screenInfo.device_scale_factor := FScreenScale;
screenInfo.depth := 0;
screenInfo.depth_per_component := 0;
screenInfo.is_monochrome := Ord(False);
screenInfo.rect := TempRect;
screenInfo.available_rect := TempRect;
Result := True;
end;
procedure TCEFBrowserThread.Browser_OnPopupShow(Sender: TObject; const browser: ICefBrowser; show: Boolean);
begin
if show then
FShowPopUp := True
else
begin
FShowPopUp := False;
FPopUpRect := rect(0, 0, 0, 0);
if (FBrowser <> nil) then FBrowser.Invalidate(PET_VIEW);
end;
end;
procedure TCEFBrowserThread.Browser_OnPopupSize(Sender: TObject; const browser: ICefBrowser; const rect: PCefRect);
begin
LogicalToDevice(rect^, FScreenScale);
FPopUpRect.Left := rect.x;
FPopUpRect.Top := rect.y;
FPopUpRect.Right := rect.x + rect.width - 1;
FPopUpRect.Bottom := rect.y + rect.height - 1;
end;
procedure TCEFBrowserThread.Browser_OnBeforePopup(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; const targetUrl, targetFrameName: ustring; targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean; const popupFeatures: TCefPopupFeatures; var windowInfo: TCefWindowInfo; var client: ICefClient; var settings: TCefBrowserSettings; var extra_info: ICefDictionaryValue; var noJavascriptAccess: Boolean; var Result: Boolean);
begin
// For simplicity, this demo blocks all popup windows and new tabs
Result := (targetDisposition in [WOD_NEW_FOREGROUND_TAB, WOD_NEW_BACKGROUND_TAB, WOD_NEW_POPUP, WOD_NEW_WINDOW]);
end;
procedure TCEFBrowserThread.Browser_OnBeforeClose(Sender: TObject; const browser: ICefBrowser);
begin
PostThreadMessage(ThreadID, WM_QUIT, 0, 0);
end;
procedure TCEFBrowserThread.Browser_OnLoadError(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; errorCode: Integer; const errorText, failedUrl: ustring);
begin
if not(FClosing) and not(Terminated) and (frame <> nil) and frame.IsValid and frame.IsMain then
try
FBrowserInfoCS.Acquire;
FErrorCode := errorCode;
FErrorText := errorText;
FFailedUrl := failedUrl;
PostThreadMessage(ThreadID, CEF_WEBPAGE_ERROR_MSG, 0, 0);
finally
FBrowserInfoCS.Release;
end;
end;
procedure TCEFBrowserThread.Browser_OnLoadingStateChange(Sender: TObject; const browser: ICefBrowser; isLoading, canGoBack, canGoForward: Boolean);
begin
if not(FClosing) and not(Terminated) and not(isLoading) then
PostThreadMessage(ThreadID, CEF_WEBPAGE_LOADED_MSG, 0, 0);
end;
procedure TCEFBrowserThread.Resize;
begin
if FClosing or Terminated or (FPanel = nil) or (FResizeCS = nil) or (FBrowser = nil) then
exit;
try
FResizeCS.Acquire;
if FResizing then
FPendingResize := True
else
if FPanel.BufferIsResized then
FBrowser.Invalidate(PET_VIEW)
else
begin
FResizing := True;
FBrowser.WasResized;
end;
finally
FResizeCS.Release;
end;
end;
function TCEFBrowserThread.CreateBrowser : boolean;
begin
Result := (FBrowser <> nil) and FBrowser.CreateBrowser;
end;
procedure TCEFBrowserThread.LoadPendingURL;
begin
if FClosing or Terminated or (FBrowser = nil) or (FBrowserInfoCS = nil) then
exit;
try
FBrowserInfoCS.Acquire;
if (length(FPendingURL) > 0) then
begin
FBrowser.LoadURL(FPendingURL);
FPendingURL := '';
end;
finally
FBrowserInfoCS.Release;
end;
end;
procedure TCEFBrowserThread.WebpagePostProcessing;
begin
if FClosing or Terminated then
exit;
if (FDelayMs > 0) then
sleep(FDelayMs);
TakeSnapshot;
if assigned(FOnSnapshotAvailable) then FOnSnapshotAvailable(self);
end;
procedure TCEFBrowserThread.TakeSnapshot;
begin
if (FPanel = nil) or (FPanel.Buffer = nil) or (FBrowserInfoCS = nil) then
exit;
try
FBrowserInfoCS.Acquire;
if (FSnapshot = nil) then
begin
FSnapshot := TBitmap.Create;
FSnapshot.PixelFormat := pf32bit;
FSnapshot.HandleType := bmDIB;
FSnapshot.Width := FPanel.BufferWidth;
FSnapshot.Height := FPanel.BufferHeight;
end;
FSnapshot.Assign(FPanel.Buffer);
finally
FBrowserInfoCS.Release;
end;
end;
procedure TCEFBrowserThread.CloseBrowser;
begin
if not(FClosing) and assigned(FBrowser) then
begin
FClosing := True;
FBrowser.CloseBrowser(True);
end;
end;
procedure TCEFBrowserThread.DoOnError;
begin
if assigned(FOnError) then
FOnError(self);
end;
procedure TCEFBrowserThread.InitError;
begin
FBrowserInfoCS.Acquire;
FErrorText := 'There was an error initializing the CEF browser.';
FBrowserInfoCS.Release;
DoOnError;
end;
procedure TCEFBrowserThread.Execute;
var
TempCont : boolean;
TempMsg : TMsg;
begin
if CreateBrowser then
begin
TempCont := True;
PeekMessage(TempMsg, 0, WM_USER, WM_USER, PM_NOREMOVE);
while TempCont and GetMessage(TempMsg, 0, 0, 0) and not(Terminated) do
begin
case TempMsg.Message of
CEF_PENDINGRESIZE : Resize;
CEF_CLOSE_BROWSER_MSG : CloseBrowser;
CEF_LOAD_PENDING_URL_MSG : LoadPendingURL;
CEF_WEBPAGE_LOADED_MSG : WebpagePostProcessing;
CEF_WEBPAGE_ERROR_MSG : DoOnError;
WM_QUIT : TempCont := False;
end;
DispatchMessage(TempMsg);
end;
end
else
InitError;
end;
end.

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demos/Delphi_VCL/ConsoleBrowser2/uEncapsulatedBrowser.pas Normal file
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// ************************************************************************
// ***************************** 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 uEncapsulatedBrowser;
{$I cef.inc}
interface
uses
{$IFDEF DELPHI16_UP}
System.SyncObjs, System.SysUtils,
{$ELSE}
SyncObjs, SysUtils,
{$ENDIF}
uCEFTypes, uCEFBrowserThread;
type
TEncapsulatedBrowser = class
protected
FThread : TCEFBrowserThread;
FWidth : integer;
FHeight : integer;
FDelayMs : integer;
FScale : single;
FSnapshotPath : ustring;
FErrorText : ustring;
procedure Thread_OnError(Sender: TObject);
procedure Thread_OnSnapshotAvailable(Sender: TObject);
public
constructor Create;
destructor Destroy; override;
procedure LoadURL(const aURL : string);
property Width : integer read FWidth write FWidth;
property Height : integer read FHeight write FHeight;
property DelayMs : integer read FDelayMs write FDelayMs;
property Scale : single read FScale write FScale;
property SnapshotPath : ustring read FSnapshotPath write FSnapshotPath;
property ErrorText : ustring read FErrorText;
end;
procedure CreateGlobalCEFApp;
function WaitForMainAppEvent : boolean;
procedure WriteResult;
implementation
uses
uCEFApplication;
var
MainAppEvent : TEvent;
EncapsulatedBrowser : TEncapsulatedBrowser = nil;
procedure GlobalCEFApp_OnContextInitialized;
var
TempParam, TempURL : ustring;
begin
TempURL := '';
// This demo reads the "/url" parameter to load it as the default URL in the browser.
// For example : ConsoleBrowser2.exe /url=https://www.briskbard.com
if (ParamCount > 0) then
begin
TempParam := paramstr(1);
if (Copy(TempParam, 1, 5) = '/url=') then
begin
TempURL := trim(Copy(TempParam, 6, length(TempParam)));
if (length(TempURL) > 0) then WriteLn('Loading ' + TempURL);
end;
end;
if (length(TempURL) = 0) then
begin
TempURL := 'https://www.google.com';
WriteLn('No URL has been specified. Using the default...');
end;
EncapsulatedBrowser := TEncapsulatedBrowser.Create;
EncapsulatedBrowser.LoadURL(TempURL);
end;
function WaitForMainAppEvent : boolean;
begin
Result := True;
// Wait for 1 minute max.
if (MainAppEvent.WaitFor(60000) = wrTimeout) then
begin
WriteLn('Timeout expired!');
Result := False;
end;
end;
procedure WriteResult;
begin
if (EncapsulatedBrowser = nil) then
WriteLn('There was a problem in the browser initialization')
else
if (length(EncapsulatedBrowser.ErrorText) > 0) then
WriteLn(EncapsulatedBrowser.ErrorText)
else
WriteLn('Snapshot saved successfully as ' + EncapsulatedBrowser.SnapshotPath);
end;
procedure CreateGlobalCEFApp;
begin
GlobalCEFApp := TCefApplication.Create;
GlobalCEFApp.WindowlessRenderingEnabled := True;
GlobalCEFApp.EnableHighDPISupport := True;
GlobalCEFApp.ShowMessageDlg := False; // This demo shouldn't show any window, just console messages.
GlobalCEFApp.BrowserSubprocessPath := 'ConsoleBrowser2_sp.exe'; // This is the other EXE for the CEF subprocesses. It's on the same directory as this app.
GlobalCEFApp.BlinkSettings := 'hideScrollbars'; // This setting removes all scrollbars to capture a cleaner snapshot
GlobalCEFApp.OnContextInitialized := GlobalCEFApp_OnContextInitialized;
GlobalCEFApp.StartMainProcess;
end;
constructor TEncapsulatedBrowser.Create;
begin
inherited Create;
FThread := nil;
FWidth := 1024;
FHeight := 768;
FDelayMs := 500;
FScale := 1; // This is the relative scale to a 96 DPI screen. It's calculated with the formula : scale = custom_DPI / 96
FSnapshotPath := 'snapshot.bmp';
FErrorText := '';
end;
destructor TEncapsulatedBrowser.Destroy;
begin
if (FThread <> nil) then
begin
if FThread.TerminateBrowserThread then
FThread.WaitFor;
FreeAndNil(FThread);
end;
inherited Destroy;
end;
procedure TEncapsulatedBrowser.LoadURL(const aURL : string);
begin
if (FThread = nil) then
begin
FThread := TCEFBrowserThread.Create(aURL, FWidth, FHeight, FDelayMs, FScale);
FThread.OnError := Thread_OnError;
FThread.OnSnapshotAvailable := Thread_OnSnapshotAvailable;
FThread.Start;
end
else
FThread.LoadUrl(aURL);
end;
procedure TEncapsulatedBrowser.Thread_OnError(Sender: TObject);
begin
// This code is executed in the TCEFBrowserThread thread context while the main application thread is waiting for MainAppEvent.
FErrorText := 'Error';
if (FThread.ErrorCode <> 0) then
FErrorText := FErrorText + ' ' + inttostr(FThread.ErrorCode);
FErrorText := FErrorText + ' : ' + FThread.ErrorText;
if (length(FThread.FailedUrl) > 0) then
FErrorText := FErrorText + ' - ' + FThread.FailedUrl;
MainAppEvent.SetEvent;
end;
procedure TEncapsulatedBrowser.Thread_OnSnapshotAvailable(Sender: TObject);
begin
// This code is executed in the TCEFBrowserThread thread context while the main application thread is waiting for MainAppEvent.
if not(FThread.SaveSnapshotToFile(FSnapshotPath)) then
FErrorText := 'There was an error copying the snapshot';
MainAppEvent.SetEvent;
end;
initialization
MainAppEvent := TEvent.Create;
finalization
MainAppEvent.Free;
if (EncapsulatedBrowser <> nil) then FreeAndNil(EncapsulatedBrowser);
end.