// Copyright © 2014 The CefSharp Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.

#include "Stdafx.h"

#include "NativeMethodWrapper.h"

namespace CefSharp
{
    namespace Core
    {
        void NativeMethodWrapper::MemoryCopy(IntPtr dest, IntPtr src, int numberOfBytes)
        {
            RtlCopyMemory(dest.ToPointer(), src.ToPointer(), numberOfBytes);
        }

        bool NativeMethodWrapper::IsFocused(IntPtr handle)
        {
            // Ask Windows which control has the focus and then check if it's one of our children
            auto focusControl = GetFocus();
            return focusControl != 0 && (IsChild((HWND)handle.ToPointer(), focusControl) == 1);
        }

        void NativeMethodWrapper::SetWindowPosition(IntPtr handle, int x, int y, int width, int height)
        {
            HWND browserHwnd = static_cast<HWND>(handle.ToPointer());
            if (browserHwnd)
            {
                if (width == 0 && height == 0)
                {
                    // For windowed browsers when the frame window is minimized set the
                    // browser window size to 0x0 to reduce resource usage.
                    SetWindowPos(browserHwnd, NULL, 0, 0, 0, 0, SWP_NOZORDER | SWP_NOMOVE | SWP_NOACTIVATE);
                }
                else
                {
                    SetWindowPos(browserHwnd, NULL, x, y, width, height, SWP_NOZORDER);
                }
            }
        }

        void NativeMethodWrapper::SetWindowParent(IntPtr child, IntPtr newParent)
        {
            HWND childHwnd = static_cast<HWND>(child.ToPointer());
            HWND newParentHwnd = static_cast<HWND>(newParent.ToPointer());

            SetParent(childHwnd, newParentHwnd);
        }

        void NativeMethodWrapper::RemoveExNoActivateStyle(IntPtr browserHwnd)
        {
            HWND hwnd = static_cast<HWND>(browserHwnd.ToPointer());

            auto exStyle = GetWindowLongPtr(hwnd, GWL_EXSTYLE);

            if (exStyle & WS_EX_NOACTIVATE)
            {
                //Remove WS_EX_NOACTIVATE
                SetWindowLongPtr(hwnd, GWL_EXSTYLE, exStyle & ~WS_EX_NOACTIVATE);
            }
        }

        IntPtr NativeMethodWrapper::LoadCursorFromLibCef(int resourceIdentifier)
        {
            auto moduleName = L"libcef.dll";

            HMODULE hModule = GetModuleHandle(moduleName);

            if (hModule == nullptr)
            {
                return IntPtr::Zero;
            }

            auto lpCursorName = MAKEINTRESOURCE(resourceIdentifier);

            auto cursor = LoadCursor(hModule, lpCursorName);

            return static_cast<IntPtr>(cursor);
        }        
    }
}