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CEF4Delphi/demos/MiniBrowser/MiniBrowser.dpr
2017-07-02 13:17:47 +02:00

223 lines
7.4 KiB
ObjectPascal

// ************************************************************************
// ***************************** 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 Díaz 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 MiniBrowser;
{$I cef.inc}
uses
{$IFDEF DELPHI16_UP}
Vcl.Forms, WinApi.Windows, System.SysUtils,
{$ELSE}
Forms, Windows, SysUtils,
{$ENDIF}
uCEFApplication,
uCEFMiscFunctions,
uCEFSchemeRegistrar,
uCEFRenderProcessHandler,
uCEFv8Handler,
uCEFInterfaces,
uCEFDomVisitor,
uCEFDomNode,
uCEFConstants,
uCEFTypes,
uCEFTask,
uMiniBrowser in 'uMiniBrowser.pas' {MiniBrowserFrm},
uTestExtension in 'uTestExtension.pas',
uHelloScheme in 'uHelloScheme.pas',
uPreferences in 'uPreferences.pas' {PreferencesFrm};
{$R *.res}
// CEF3 needs to set the LARGEADDRESSAWARE flag which allows 32-bit processes to use up to 3GB of RAM.
{$SetPEFlags IMAGE_FILE_LARGE_ADDRESS_AWARE}
var
TempProcessHandler : TCefCustomRenderProcessHandler;
procedure SimpleDOMIteration(const aDocument: ICefDomDocument);
var
TempHead, TempChild : ICefDomNode;
begin
try
if (aDocument <> nil) then
begin
TempHead := aDocument.Head;
if (TempHead <> nil) then
begin
TempChild := TempHead.FirstChild;
while (TempChild <> nil) do
begin
CefLog('CEF4Delphi', 1, CEF_LOG_SEVERITY_ERROR, 'Head child element : ' + TempChild.Name);
TempChild := TempChild.NextSibling;
end;
end;
end;
except
on e : exception do
if CustomExceptionHandler('SimpleDOMIteration', e) then raise;
end;
end;
procedure SimpleNodeSearch(const aDocument: ICefDomDocument);
const
NODE_ID = 'lst-ib';
var
TempNode : ICefDomNode;
begin
try
if (aDocument <> nil) then
begin
TempNode := aDocument.GetElementById(NODE_ID);
if (TempNode <> nil) then
CefLog('CEF4Delphi', 1, CEF_LOG_SEVERITY_ERROR, NODE_ID + ' element name : ' + TempNode.Name);
TempNode := aDocument.GetFocusedNode;
if (TempNode <> nil) then
CefLog('CEF4Delphi', 1, CEF_LOG_SEVERITY_ERROR, 'Focused element name : ' + TempNode.Name);
end;
except
on e : exception do
if CustomExceptionHandler('SimpleNodeSearch', e) then raise;
end;
end;
procedure DOMVisitor_OnDocAvailable(const document: ICefDomDocument);
begin
// This function is called from a different process.
// document is only valid inside this function.
// As an example, this function only writes the document title to the 'debug.log' file.
CefLog('CEF4Delphi', 1, CEF_LOG_SEVERITY_ERROR, 'document.Title : ' + document.Title);
// Simple DOM iteration example
SimpleDOMIteration(document);
// Simple DOM searches
SimpleNodeSearch(document);
end;
procedure ProcessHandler_OnCustomMessage(const browser: ICefBrowser; sourceProcess: TCefProcessId; const message: ICefProcessMessage);
var
TempFrame : ICefFrame;
TempVisitor : TCefFastDomVisitor;
begin
if (browser <> nil) then
begin
TempFrame := browser.MainFrame;
if (TempFrame <> nil) then
begin
TempVisitor := TCefFastDomVisitor.Create(DOMVisitor_OnDocAvailable);
TempFrame.VisitDom(TempVisitor);
end;
end;
end;
procedure ProcessHandler_OnWebKitReady;
begin
{$IFDEF DELPHI14_UP}
// Registering the extension. Read this document for more details :
// https://bitbucket.org/chromiumembedded/cef/wiki/JavaScriptIntegration.md
TCefRTTIExtension.Register('myextension', TTestExtension);
{$ENDIF}
end;
procedure GlobalCEFApp_OnRegCustomSchemes(const registrar: TCefSchemeRegistrarRef);
begin
registrar.AddCustomScheme('hello', True, True, False, False, False, False);
end;
begin
// This ProcessHandler is used for the extension and the DOM visitor demos.
// It can be removed if you don't want those features.
TempProcessHandler := TCefCustomRenderProcessHandler.Create;
TempProcessHandler.MessageName := 'retrievedom'; // same message name than TMiniBrowserFrm.VisitDOMMsg
TempProcessHandler.OnCustomMessage := ProcessHandler_OnCustomMessage;
TempProcessHandler.OnWebKitReady := ProcessHandler_OnWebKitReady;
GlobalCEFApp := TCefApplication.Create;
GlobalCEFApp.RemoteDebuggingPort := 9000;
GlobalCEFApp.RenderProcessHandler := TempProcessHandler as ICefRenderProcessHandler;
GlobalCEFApp.OnRegCustomSchemes := GlobalCEFApp_OnRegCustomSchemes;
// In case you want to use custom directories for the CEF3 binaries, cache, cookies and user data.
{
GlobalCEFApp.FrameworkDirPath := 'cef';
GlobalCEFApp.ResourcesDirPath := 'cef';
GlobalCEFApp.LocalesDirPath := 'cef\locales';
GlobalCEFApp.cache := 'cef\cache';
GlobalCEFApp.cookies := 'cef\cookies';
GlobalCEFApp.UserDataPath := 'cef\User Data';
}
// Enabling the debug log file for then DOM visitor demo.
// This adds lots of warnings to the console, specially if you run this inside VirtualBox.
// Remove it if you don't want to use the DOM visitor
GlobalCEFApp.LogFile := 'debug.log';
GlobalCEFApp.LogSeverity := LOGSEVERITY_ERROR;
// Examples of command line switches.
// **********************************
//
// Uncomment the following line to see an FPS counter in the browser.
//GlobalCEFApp.AddCustomCommandLine('--show-fps-counter');
//
// Uncomment the following line to change the user agent string.
//GlobalCEFApp.AddCustomCommandLine('--user-agent', 'MiniBrowser');
if GlobalCEFApp.StartMainProcess then
begin
// You can register the Scheme Handler Factory here or later, for example in a context menu command.
CefRegisterSchemeHandlerFactory('hello', '', THelloScheme);
Application.Initialize;
{$IFDEF DELPHI11_UP}
Application.MainFormOnTaskbar := True;
{$ENDIF}
Application.CreateForm(TMiniBrowserFrm, MiniBrowserFrm);
Application.CreateForm(TPreferencesFrm, PreferencesFrm);
Application.Run;
end;
GlobalCEFApp.Free;
end.