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Source/Engine/Platform/Windows/WindowsClipboard.cpp

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#if PLATFORM_WINDOWS
+
+#include "WindowsClipboard.h"
+#include "Engine/Core/Collections/Array.h"
+#include "../Win32/IncludeWindowsHeaders.h"
+
+typedef struct _DROPFILES
+{
+    DWORD pFiles;
+    POINT pt;
+    BOOL fNC;
+    BOOL fWide;
+} DROPFILES, *LPDROPFILES;
+
+void WindowsClipboard::Clear()
+{
+    OpenClipboard(nullptr);
+    EmptyClipboard();
+    CloseClipboard();
+}
+
+void WindowsClipboard::SetText(const StringView& text)
+{
+    const int32 size = (text.Length() + 1) * sizeof(Char);
+    const HGLOBAL hMem = GlobalAlloc(GMEM_MOVEABLE, size);
+    Platform::MemoryCopy(GlobalLock(hMem), text.GetText(), size);
+    GlobalUnlock(hMem);
+
+    OpenClipboard(nullptr);
+    EmptyClipboard();
+    SetClipboardData(CF_UNICODETEXT, hMem);
+    CloseClipboard();
+}
+
+void WindowsClipboard::SetRawData(const Span<byte>& data)
+{
+    HGLOBAL hMem = GlobalAlloc(GMEM_MOVEABLE, data.Length());
+    Platform::MemoryCopy(GlobalLock(hMem), data.Get(), data.Length());
+    GlobalUnlock(hMem);
+
+    OpenClipboard(nullptr);
+    EmptyClipboard();
+    SetClipboardData(CF_PENDATA, hMem);
+    CloseClipboard();
+}
+
+void WindowsClipboard::SetFiles(const Array<String>& files)
+{
+    int32 size = sizeof(DROPFILES);
+    for (int32 i = 0; i < files.Count(); i++)
+    {
+        size += (files[i].Length() + 1) * sizeof(Char);
+    }
+    size += 2 * sizeof(Char);
+
+    HGLOBAL hMem = GlobalAlloc(GMEM_MOVEABLE, size);
+    DROPFILES* data = (DROPFILES*)GlobalLock(hMem);
+    ZeroMemory(data, size);
+    data->pFiles = sizeof(DROPFILES);
+    data->fWide = TRUE;
+    LPWSTR ptr = (LPWSTR)(data + 1);
+    for (int32 i = 0; i < files.Count(); i++)
+    {
+        Platform::MemoryCopy(ptr, files[i].Get(), (files[i].Length() + 1) * sizeof(Char));
+        ptr += files[i].Length() + 1;
+    }
+    *ptr++ = 0;
+    *ptr = 0;
+    GlobalUnlock(hMem);
+
+    OpenClipboard(nullptr);
+    EmptyClipboard();
+    SetClipboardData(CF_HDROP, hMem);
+    CloseClipboard();
+}
+
+String WindowsClipboard::GetText()
+{
+    String result;
+    OpenClipboard(nullptr);
+    HANDLE hMem = GetClipboardData(CF_UNICODETEXT);
+    if (hMem)
+    {
+        Char* data = static_cast<Char*>(GlobalLock(hMem));
+        result = data;
+        GlobalUnlock(data);
+    }
+    else
+    {
+        hMem = GetClipboardData(CF_TEXT);
+        if (hMem)
+        {
+            char* data = static_cast<char*>(GlobalLock(hMem));
+            result = data;
+            GlobalUnlock(data);
+        }
+    }
+    CloseClipboard();
+    return result;
+}
+
+Array<byte> WindowsClipboard::GetRawData()
+{
+    Array<byte> result;
+    OpenClipboard(nullptr);
+    HANDLE hMem = GetClipboardData(CF_PENDATA);
+    if (hMem)
+    {
+        auto data = GlobalLock(hMem);
+        auto size = static_cast<int32>(GlobalSize(hMem));
+
+        if (size > 0)
+        {
+            result.Set(static_cast<byte*>(data), size);
+        }
+
+        GlobalUnlock(data);
+    }
+    CloseClipboard();
+    return result;
+}
+
+Array<String> WindowsClipboard::GetFiles()
+{
+    Array<String> result;
+    OpenClipboard(nullptr);
+    HANDLE hMem = GetClipboardData(CF_HDROP);
+    if (hMem)
+    {
+        auto data = (DROPFILES*)GlobalLock(hMem);
+        auto size = static_cast<int32>(GlobalSize(hMem));
+
+        if (size > 0)
+        {
+            if (data->fWide)
+            {
+                Char* ptr = (Char*)(data + 1);
+                while (*ptr)
+                {
+                    int32 length = StringUtils::Length(ptr);
+                    result.Add(String(ptr, length));
+                    ptr += length + 1;
+                }
+            }
+            else
+            {
+                char* ptr = (char*)(data + 1);
+                while (*ptr)
+                {
+                    int32 length = StringUtils::Length(ptr);
+                    result.Add(String(ptr, length));
+                    ptr += length + 1;
+                }
+            }
+        }
+
+        GlobalUnlock(data);
+    }
+    CloseClipboard();
+    return result;
+}
+
+#endif