CEFImeHandler.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
 
#if WITH_CEF3 && !PLATFORM_LINUX
 
#include "Widgets/SWidget.h"
 
#if PLATFORM_WINDOWS
#include "Windows/AllowWindowsPlatformTypes.h"
#include "Windows/AllowWindowsPlatformAtomics.h"
#endif
#pragma push_macro("OVERRIDE")
#undef OVERRIDE // cef headers provide their own OVERRIDE macro
THIRD_PARTY_INCLUDES_START
#if PLATFORM_APPLE
PRAGMA_DISABLE_DEPRECATION_WARNINGS
#endif
#include "include/cef_client.h"
#include "include/cef_values.h"
#if PLATFORM_APPLE
PRAGMA_ENABLE_DEPRECATION_WARNINGS
#endif
THIRD_PARTY_INCLUDES_END
#pragma pop_macro("OVERRIDE")
#if PLATFORM_WINDOWS
#include "Windows/HideWindowsPlatformAtomics.h"
#include "Windows/HideWindowsPlatformTypes.h"
#endif
#include "Layout/Geometry.h"
 
class ITextInputMethodSystem;
class FCEFTextInputMethodContext;
class ITextInputMethodChangeNotifier;
class SWidget;
 
class FCEFImeHandler
    : public TSharedFromThis<FCEFImeHandler>
{
public:
    FCEFImeHandler(CefRefPtr<CefBrowser> Browser);
 
    void UnbindCefBrowser();
    void CacheBrowserSlateInfo(const TSharedRef<SWidget>& Widget);
    void SetFocus(bool bHasFocus);
    void UpdateCachedGeometry(const FGeometry& AllottedGeometry);
 
    void CEFCompositionRangeChanged(const CefRange& SelectionRange, const CefRenderHandler::RectList& CharacterBounds);
    
    bool OnProcessMessageReceived(CefRefPtr<CefBrowser> Browser, CefProcessId SourceProcess, CefRefPtr<CefProcessMessage> Message);
 
    void SendProcessMessage(CefRefPtr<CefProcessMessage> Message);
 
    // FWebImeHandler Interface
 
    void BindInputMethodSystem(ITextInputMethodSystem* InTextInputMethodSystem);
    void UnbindInputMethodSystem();
 
 
private:
 
    bool IsValid()
    {
        return InternalCefBrowser.get() != nullptr;
    }
 
    void InitContext();
    void DeactivateContext();
    void DestroyContext();
 
    bool HandleFocusChangedMessage(CefRefPtr<CefListValue> MessageArguments);
 
    CefRefPtr<CefBrowser> InternalCefBrowser;
 
    TWeakPtr<SWidget> InternalBrowserSlateWidget;
 
    ITextInputMethodSystem* TextInputMethodSystem;
 
    TSharedPtr<FCEFTextInputMethodContext> TextInputMethodContext;
 
    TSharedPtr<ITextInputMethodChangeNotifier> TextInputMethodChangeNotifier;
 
    // Allow IME context to access functions only it needs.
    friend class FCEFTextInputMethodContext;
};
 
#endif