mfc cef<转>

其他 2018-09-21 19:30:51 阅读次数: 0 
在mfc单文档程序中加入cef：
1.在BOOL CtestCEFApp::InitInstance()中初始化cef
HINSTANCE hInst = GetModuleHandle(NULL);
CefMainArgs main_args(hInst);


m_cefApp = new ClientApp();


//cef默认启动四个进程，分别是浏览器主进程，渲染进程，GPU进程，插件进程，如果不是主进程则直接退出
//AfxMessageBox(L"CefExecuteProcess");
int exit_code = CefExecuteProcess(main_args, m_cefApp.get(), NULL);
if (exit_code >= 0)
return exit_code;


//设置cef参数
CString szCEFCache;
CString szPath;
INT nLen = GetTempPath( 0, NULL ) + 1;
GetTempPath( nLen, szPath.GetBuffer( nLen ));
szCEFCache.Format( _T("%scache\0\0"), szPath );


CefSettings settings;
//settings.no_sandbox = TRUE;
//settings.multi_threaded_message_loop = FALSE;
CefString(&settings.cache_path) = szCEFCache;


//CefSettingsTraits::init( &cSettings);
//cSettings.multi_threaded_message_loop = false;


m_bCEFInitialized = CefInitialize(main_args, settings,m_cefApp.get(), NULL);


//初始化自定义协议
scheme_test::InitTest();
2.创建浏览器窗口
BOOL ClientApp::CreateBrowser(HWND hWnd, CRect rect, LPCTSTR pszURL)
{
CefBrowserSettings settings;
CefWindowInfo info;


info.SetAsChild( hWnd, rect );
std::string url = "test://test/html1.html";


return CefBrowserHost::CreateBrowser( info, m_cefHandler.get(), url, settings, NULL );
}
3.资源文件加载
namespace scheme_test {


// Implementation of the factory for for creating schema handlers.
class ClientSchemeHandlerFactory : public CefSchemeHandlerFactory {
public:
// Return a new scheme handler instance to handle the request.
virtual CefRefPtr<CefResourceHandler> Create(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
const CefString& scheme_name,
CefRefPtr<CefRequest> request)
OVERRIDE {
return NULL;
}


IMPLEMENT_REFCOUNTING(ClientSchemeHandlerFactory);
};


//此方法在ClientApp的虚函数中被调用
void RegisterCustomSchemes(CefRefPtr<CefSchemeRegistrar> registrar,
std::vector<CefString>& cookiable_schemes) {
registrar->AddCustomScheme("test", true, false, false);//注册一个新的协议test
}


//初始化时调用
void InitTest() {
CefRegisterSchemeHandlerFactory("test", "test", new ClientSchemeHandlerFactory());//注册一个新的域名，并且新建一个可以处理此域名请求的类
}


}  // namespace scheme_test
4.两个关键的类
class CWebClient
: public CefClient
, public CefLifeSpanHandler
, public CefRequestHandler
{


public:
CMyWebBrowser m_wndBrowser;
public:
CWebClient(void){}
virtual ~CWebClient(void){}


virtual CefRefPtr<CefLifeSpanHandler> GetLifeSpanHandler() { return this; }
virtual CefRefPtr<CefRequestHandler> GetRequestHandler() { return this; }


//virtual bool DoClose( CefRefPtr<CefBrowser> browser );
//virtual void OnBeforeClose( CefRefPtr<CefBrowser> browser );
virtual void OnAfterCreated( CefRefPtr<CefBrowser> browser );


//此处处理接收到的message
virtual bool OnProcessMessageReceived( CefRefPtr<CefBrowser> browser, CefProcessId source_process, CefRefPtr<CefProcessMessage> message );
//此处加载本地html资源
virtual CefRefPtr<CefResourceHandler> GetResourceHandler( CefRefPtr<CefBrowser> browser, CefRefPtr<CefFrame> frame, CefRefPtr<CefRequest> request );


private:
bool ParseTestUrl(const std::string& url, std::string* file_name, std::string* mime_type);


public:


IMPLEMENT_REFCOUNTING(CWebClient);
IMPLEMENT_LOCKING(CWebClient);
};
class ClientApp: public CefApp
,public CefBrowserProcessHandler
,public CefRenderProcessHandler
{
public:
ClientApp(void);
ClientApp(HWND hWnd);
~ClientApp(void);


virtual CefRefPtr<CefBrowserProcessHandler> GetBrowserProcessHandler() OVERRIDE { return this; }
virtual CefRefPtr<CefRenderProcessHandler> GetRenderProcessHandler()OVERRIDE { return this; }
//此处处理js和c++调用
virtual void OnContextCreated( CefRefPtr<CefBrowser> browser, CefRefPtr<CefFrame> frame, CefRefPtr<CefV8Context> context );


virtual void OnContextInitialized() OVERRIDE;


//此处要<span style="font-family: Arial, Helvetica, sans-serif;">注册一个新的协议test</span>
virtual void OnRegisterCustomSchemes( CefRefPtr<CefSchemeRegistrar> registrar );


BOOL CreateBrowser(HWND hWnd, CRect rect, LPCTSTR pszURL);


public:
CefRefPtr<CWebClient> m_cefHandler;


private:
IMPLEMENT_REFCOUNTING(ClientApp);


};
5.c++和js相互调用
第一种：
class CefV8ExtensionHandler : public CefV8Handler
{
public:
CefV8ExtensionHandler(){}
~CefV8ExtensionHandler(){}


virtual bool Execute( const CefString& name, CefRefPtr<CefV8Value> object, const CefV8ValueList& arguments, CefRefPtr<CefV8Value>& retval, CefString& exception );


IMPLEMENT_REFCOUNTING(CefV8ExtensionHandler);
};
void ClientApp::OnContextCreated( CefRefPtr<CefBrowser> browser, CefRefPtr<CefFrame> frame, CefRefPtr<CefV8Context> context )
{
CefRefPtr<CefV8Value> obj = context->GetGlobal();


CefRefPtr<CefV8Handler> handler = new CefV8ExtensionHandler();


obj->SetValue("test", CefV8Value::CreateFunction("test", handler), V8_PROPERTY_ATTRIBUTE_READONLY);


}
bool CefV8ExtensionHandler::Execute( const CefString& name, CefRefPtr<CefV8Value> object, const CefV8ValueList& arguments, CefRefPtr<CefV8Value>& retval, CefString& exception )
{
if (name == "test")
{
std::string arg1 = arguments[0]->GetStringValue();


//MessageBoxA(NULL, arg1.c_str(), NULL, NULL);


retval = CefV8Value::CreateString(arg1);


CefRefPtr<CefBrowser> browser = CefV8Context::GetCurrentContext()->GetBrowser();
ASSERT(browser.get());


CefRefPtr<CefProcessMessage> message = CefProcessMessage::Create("test");


browser->SendProcessMessage(PID_BROWSER, message);


return true;
}


return false;
}
第二种：
std::string app_code =
"var app;"
"if (!app)"
"  app = {};"
"(function() {"
"  app.sendMessage = function(name, arguments) {"
"    native function sendMessage();"
"    return sendMessage(name, arguments);"
"  };"
"  app.setMessageCallback = function(name, callback) {"
"    native function setMessageCallback();"
"    return setMessageCallback(name, callback);"
"  };"
"  app.removeMessageCallback = function(name) {"
"    native function removeMessageCallback();"
"    return removeMessageCallback(name);"
"  };"
"})();";
CefRegisterExtension("v8/app", app_code,
new ClientAppExtensionHandler(this));
6.自定义标题栏需要子类化浏览器窗口方能接收到消息
class CMyWebBrowser : public CWnd
{
DECLARE_DYNCREATE(CMyWebBrowser)


public:
CMyWebBrowser(void);
virtual ~CMyWebBrowser(void);


protected:
DECLARE_MESSAGE_MAP()


public:
afx_msg LRESULT OnNcHitTest(CPoint point);
};
LRESULT CMyWebBrowser::OnNcHitTest(CPoint point)
{
CRect rc;
GetClientRect(&rc);
rc.top = rc.top;
rc.left = rc.left;
rc.right = rc.right;
rc.bottom = 20;
ClientToScreen(&rc);


CPoint screenpoint(point);
ScreenToClient(&screenpoint);


if (rc.PtInRect(point))
{
AfxGetApp()->GetMainWnd()->PostMessage(WM_NCLBUTTONDOWN, HTCAPTION, MAKELPARAM(screenpoint.x, screenpoint.y));


return 0;
}
else
return CWnd::OnNcHitTest(point);
}
void CWebClient::OnAfterCreated( CefRefPtr<CefBrowser> browser )
{
HWND hWnd = browser->GetHost()->GetWindowHandle();
HWND hChildWnd = ::GetNextWindow(hWnd, GW_CHILD );
m_wndBrowser.SubclassWindow(hChildWnd);


CefLifeSpanHandler::OnAfterCreated(browser);
}
7.消息循环
int CtestCEFApp::ExitInstance()
{
if( m_bCEFInitialized )
{
m_bCEFInitialized = false;


m_cefApp = NULL;


CefShutdown();
}


return CWinAppEx::ExitInstance();
}


BOOL CtestCEFApp::PumpMessage()
{
if( m_bCEFInitialized )
CefDoMessageLoopWork();


return CWinAppEx::PumpMessage();
}

---------------------

本文来自 lls2012 的CSDN 博客 ，全文地址请点击：https://blog.csdn.net/lls2012/article/details/47976101?utm_source=copy

https://blog.csdn.net/lls2012/article/details/47976101

在mfc单文档程序中加入cef： 1.在BOOL CtestCEFApp::InitInstance()中初始化cef HINSTANCE hInst = GetModuleHandle(NULL); CefMainArgs main_args(hInst); m_cefApp = new ClientApp(); //cef默认启动四个进程，分别是浏览器主进程，渲染进程，GPU进程，插件进程，如果不是主进程则直接退出 //AfxMessageBox(L"CefExecuteProcess"); int exit_code = CefExecuteProcess(main_args, m_cefApp.get(), NULL); if (exit_code >= 0) return exit_code; //设置cef参数 CString szCEFCache; CString szPath; INT nLen = GetTempPath( 0, NULL ) + 1; GetTempPath( nLen, szPath.GetBuffer( nLen )); szCEFCache.Format( _T("%scache\0\0"), szPath ); CefSettings settings; //settings.no_sandbox = TRUE; //settings.multi_threaded_message_loop = FALSE; CefString(&settings.cache_path) = szCEFCache; //CefSettingsTraits::init( &cSettings); //cSettings.multi_threaded_message_loop = false; m_bCEFInitialized = CefInitialize(main_args, settings,m_cefApp.get(), NULL); //初始化自定义协议 scheme_test::InitTest(); 2.创建浏览器窗口 BOOL ClientApp::CreateBrowser(HWND hWnd, CRect rect, LPCTSTR pszURL) { CefBrowserSettings settings; CefWindowInfo info; info.SetAsChild( hWnd, rect ); std::string url = "test://test/html1.html"; return CefBrowserHost::CreateBrowser( info, m_cefHandler.get(), url, settings, NULL ); } 3.资源文件加载 namespace scheme_test { // Implementation of the factory for for creating schema handlers. class ClientSchemeHandlerFactory : public CefSchemeHandlerFactory { public: // Return a new scheme handler instance to handle the request. virtual CefRefPtr Create(CefRefPtr browser, CefRefPtr frame, const CefString& scheme_name, CefRefPtr request) OVERRIDE { return NULL; } IMPLEMENT_REFCOUNTING(ClientSchemeHandlerFactory); }; //此方法在ClientApp的虚函数中被调用 void RegisterCustomSchemes(CefRefPtr registrar, std::vector& cookiable_schemes) { registrar->AddCustomScheme("test", true, false, false);//注册一个新的协议test } //初始化时调用 void InitTest() { CefRegisterSchemeHandlerFactory("test", "test", new ClientSchemeHandlerFactory());//注册一个新的域名，并且新建一个可以处理此域名请求的类 } }  // namespace scheme_test 4.两个关键的类 class CWebClient : public CefClient , public CefLifeSpanHandler , public CefRequestHandler { public: CMyWebBrowser m_wndBrowser; public: CWebClient(void){} virtual ~CWebClient(void){} virtual CefRefPtr GetLifeSpanHandler() { return this; } virtual CefRefPtr GetRequestHandler() { return this; } //virtual bool DoClose( CefRefPtr browser ); //virtual void OnBeforeClose( CefRefPtr browser ); virtual void OnAfterCreated( CefRefPtr browser ); //此处处理接收到的message virtual bool OnProcessMessageReceived( CefRefPtr browser, CefProcessId source_process, CefRefPtr message ); //此处加载本地html资源 virtual CefRefPtr GetResourceHandler( CefRefPtr browser, CefRefPtr frame, CefRefPtr request ); private: bool ParseTestUrl(const std::string& url, std::string* file_name, std::string* mime_type); public: IMPLEMENT_REFCOUNTING(CWebClient); IMPLEMENT_LOCKING(CWebClient); }; class ClientApp: public CefApp ,public CefBrowserProcessHandler ,public CefRenderProcessHandler { public: ClientApp(void); ClientApp(HWND hWnd); ~ClientApp(void); virtual CefRefPtr GetBrowserProcessHandler() OVERRIDE { return this; } virtual CefRefPtr GetRenderProcessHandler()OVERRIDE { return this; } //此处处理js和c++调用 virtual void OnContextCreated( CefRefPtr browser, CefRefPtr frame, CefRefPtr context ); virtual void OnContextInitialized() OVERRIDE; //此处要注册一个新的协议test virtual void OnRegisterCustomSchemes( CefRefPtr registrar ); BOOL CreateBrowser(HWND hWnd, CRect rect, LPCTSTR pszURL); public: CefRefPtr m_cefHandler; private: IMPLEMENT_REFCOUNTING(ClientApp); }; 5.c++和js相互调用 第一种： class CefV8ExtensionHandler : public CefV8Handler { public: CefV8ExtensionHandler(){} ~CefV8ExtensionHandler(){} virtual bool Execute( const CefString& name, CefRefPtr object, const CefV8ValueList& arguments, CefRefPtr& retval, CefString& exception ); IMPLEMENT_REFCOUNTING(CefV8ExtensionHandler); }; void ClientApp::OnContextCreated( CefRefPtr browser, CefRefPtr frame, CefRefPtr context ) { CefRefPtr obj = context->GetGlobal(); CefRefPtr handler = new CefV8ExtensionHandler(); obj->SetValue("test", CefV8Value::CreateFunction("test", handler), V8_PROPERTY_ATTRIBUTE_READONLY); } bool CefV8ExtensionHandler::Execute( const CefString& name, CefRefPtr object, const CefV8ValueList& arguments, CefRefPtr& retval, CefString& exception ) { if (name == "test") { std::string arg1 = arguments[0]->GetStringValue(); //MessageBoxA(NULL, arg1.c_str(), NULL, NULL); retval = CefV8Value::CreateString(arg1); CefRefPtr browser = CefV8Context::GetCurrentContext()->GetBrowser(); ASSERT(browser.get()); CefRefPtr message = CefProcessMessage::Create("test"); browser->SendProcessMessage(PID_BROWSER, message); return true; } return false; } 第二种： std::string app_code = "var app;" "if (!app)" "  app = {};" "(function() {" "  app.sendMessage = function(name, arguments) {" "    native function sendMessage();" "    return sendMessage(name, arguments);" "  };" "  app.setMessageCallback = function(name, callback) {" "    native function setMessageCallback();" "    return setMessageCallback(name, callback);" "  };" "  app.removeMessageCallback = function(name) {" "    native function removeMessageCallback();" "    return removeMessageCallback(name);" "  };" "})();"; CefRegisterExtension("v8/app", app_code, new ClientAppExtensionHandler(this)); 6.自定义标题栏需要子类化浏览器窗口方能接收到消息 class CMyWebBrowser : public CWnd { DECLARE_DYNCREATE(CMyWebBrowser) public: CMyWebBrowser(void); virtual ~CMyWebBrowser(void); protected: DECLARE_MESSAGE_MAP() public: afx_msg LRESULT OnNcHitTest(CPoint point); }; LRESULT CMyWebBrowser::OnNcHitTest(CPoint point) { CRect rc; GetClientRect(&rc); rc.top = rc.top; rc.left = rc.left; rc.right = rc.right; rc.bottom = 20; ClientToScreen(&rc); CPoint screenpoint(point); ScreenToClient(&screenpoint); if (rc.PtInRect(point)) { AfxGetApp()->GetMainWnd()->PostMessage(WM_NCLBUTTONDOWN, HTCAPTION, MAKELPARAM(screenpoint.x, screenpoint.y)); return 0; } else return CWnd::OnNcHitTest(point); } void CWebClient::OnAfterCreated( CefRefPtr browser ) { HWND hWnd = browser->GetHost()->GetWindowHandle(); HWND hChildWnd = ::GetNextWindow(hWnd, GW_CHILD ); m_wndBrowser.SubclassWindow(hChildWnd); CefLifeSpanHandler::OnAfterCreated(browser); } 7.消息循环 int CtestCEFApp::ExitInstance() { if( m_bCEFInitialized ) { m_bCEFInitialized = false; m_cefApp = NULL; CefShutdown(); } return CWinAppEx::ExitInstance(); } BOOL CtestCEFApp::PumpMessage() { if( m_bCEFInitialized ) CefDoMessageLoopWork(); return CWinAppEx::PumpMessage(); } --------------------- 本文来自 lls2012 的CSDN 博客 ，全文地址请点击：https://blog.csdn.net/lls2012/article/details/47976101?utm_source=copy 

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