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ImHex/main/gui/source/window/win_window.cpp

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#include "window.hpp"
#include "messaging.hpp"
#if defined(OS_WINDOWS)
#include <hex/helpers/utils.hpp>
#include <hex/helpers/logger.hpp>
#include <imgui.h>
#include <imgui_internal.h>
#define GLFW_EXPOSE_NATIVE_WIN32
#include <GLFW/glfw3native.h>
#undef GLFW_EXPOSE_NATIVE_WIN32
#include <winbase.h>
#include <winuser.h>
#include <dwmapi.h>
#include <windowsx.h>
#include <shobjidl.h>
#include <wrl/client.h>
#include <fcntl.h>
#include <cstdio>
namespace hex {
template<typename T>
using WinUniquePtr = std::unique_ptr<std::remove_pointer_t<T>, BOOL(*)(T)>;
static LONG_PTR g_oldWndProc;
static float g_titleBarHeight;
static Microsoft::WRL::ComPtr<ITaskbarList4> g_taskbarList;
void nativeErrorMessage(const std::string &message) {
log::fatal(message);
MessageBox(nullptr, message.c_str(), "Error", MB_ICONERROR | MB_OK);
}
// Custom Window procedure for receiving OS events
static LRESULT commonWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
switch (uMsg) {
case WM_COPYDATA: {
// Handle opening files in existing instance
auto message = reinterpret_cast<COPYDATASTRUCT *>(lParam);
if (message == nullptr) break;
ssize_t nullIndex = -1;
auto messageData = static_cast<const char*>(message->lpData);
size_t messageSize = message->cbData;
for (size_t i = 0; i < messageSize; i++) {
if (messageData[i] == '\0') {
nullIndex = i;
break;
}
}
if (nullIndex == -1) {
log::warn("Received invalid forwarded event");
break;
}
std::string eventName(messageData, nullIndex);
std::vector<u8> eventData(messageData + nullIndex + 1, messageData + messageSize);
hex::messaging::messageReceived(eventName, eventData);
break;
}
case WM_SETTINGCHANGE: {
// Handle Windows theme changes
if (lParam == 0) break;
if (LPCTSTR(lParam) == std::string_view("ImmersiveColorSet")) {
EventOSThemeChanged::post();
}
break;
}
case WM_SETCURSOR: {
if (LOWORD(lParam) != HTCLIENT) {
return CallWindowProc((WNDPROC)g_oldWndProc, hwnd, uMsg, wParam, lParam);
} else {
switch (ImGui::GetMouseCursor()) {
case ImGuiMouseCursor_Arrow:
SetCursor(LoadCursor(nullptr, IDC_ARROW));
break;
case ImGuiMouseCursor_Hand:
SetCursor(LoadCursor(nullptr, IDC_HAND));
break;
case ImGuiMouseCursor_ResizeEW:
SetCursor(LoadCursor(nullptr, IDC_SIZEWE));
break;
case ImGuiMouseCursor_ResizeNS:
SetCursor(LoadCursor(nullptr, IDC_SIZENS));
break;
case ImGuiMouseCursor_ResizeNWSE:
SetCursor(LoadCursor(nullptr, IDC_SIZENWSE));
break;
case ImGuiMouseCursor_ResizeNESW:
SetCursor(LoadCursor(nullptr, IDC_SIZENESW));
break;
case ImGuiMouseCursor_ResizeAll:
SetCursor(LoadCursor(nullptr, IDC_SIZEALL));
break;
case ImGuiMouseCursor_NotAllowed:
SetCursor(LoadCursor(nullptr, IDC_NO));
break;
case ImGuiMouseCursor_TextInput:
SetCursor(LoadCursor(nullptr, IDC_IBEAM));
break;
}
return TRUE;
}
}
default:
break;
}
return CallWindowProc((WNDPROC)g_oldWndProc, hwnd, uMsg, wParam, lParam);
}
// Custom window procedure for borderless window
static LRESULT borderlessWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
switch (uMsg) {
case WM_MOUSELAST:
break;
case WM_NCACTIVATE:
case WM_NCPAINT:
// Handle Windows Aero Snap
return DefWindowProcW(hwnd, uMsg, wParam, lParam);
case WM_NCCALCSIZE: {
// Handle window resizing
RECT &rect = *reinterpret_cast<RECT *>(lParam);
RECT client = rect;
CallWindowProc((WNDPROC)g_oldWndProc, hwnd, uMsg, wParam, lParam);
if (IsMaximized(hwnd)) {
WINDOWINFO windowInfo = { };
windowInfo.cbSize = sizeof(WINDOWINFO);
GetWindowInfo(hwnd, &windowInfo);
rect = RECT {
.left = static_cast<LONG>(client.left + windowInfo.cyWindowBorders),
.top = static_cast<LONG>(client.top + windowInfo.cyWindowBorders),
.right = static_cast<LONG>(client.right - windowInfo.cyWindowBorders),
.bottom = static_cast<LONG>(client.bottom - windowInfo.cyWindowBorders) + 1
};
} else {
rect = client;
}
return 0;
}
case WM_NCHITTEST: {
// Handle window resizing and moving
POINT cursor = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) };
const POINT border {
static_cast<LONG>((::GetSystemMetrics(SM_CXFRAME) + ::GetSystemMetrics(SM_CXPADDEDBORDER)) * ImHexApi::System::getGlobalScale()),
static_cast<LONG>((::GetSystemMetrics(SM_CYFRAME) + ::GetSystemMetrics(SM_CXPADDEDBORDER)) * ImHexApi::System::getGlobalScale())
};
RECT window;
if (!::GetWindowRect(hwnd, &window)) {
return HTNOWHERE;
}
constexpr static auto RegionClient = 0b0000;
constexpr static auto RegionLeft = 0b0001;
constexpr static auto RegionRight = 0b0010;
constexpr static auto RegionTop = 0b0100;
constexpr static auto RegionBottom = 0b1000;
const auto result =
RegionLeft * (cursor.x < (window.left + border.x)) |
RegionRight * (cursor.x >= (window.right - border.x)) |
RegionTop * (cursor.y < (window.top + border.y)) |
RegionBottom * (cursor.y >= (window.bottom - border.y));
if (result != 0 && (ImGui::IsAnyItemHovered() || ImGui::IsPopupOpen(nullptr, ImGuiPopupFlags_AnyPopupId))) {
break;
}
std::string_view hoveredWindowName = GImGui->HoveredWindow == nullptr ? "" : GImGui->HoveredWindow->Name;
switch (result) {
case RegionLeft:
return HTLEFT;
case RegionRight:
return HTRIGHT;
case RegionTop:
return HTTOP;
case RegionBottom:
return HTBOTTOM;
case RegionTop | RegionLeft:
return HTTOPLEFT;
case RegionTop | RegionRight:
return HTTOPRIGHT;
case RegionBottom | RegionLeft:
return HTBOTTOMLEFT;
case RegionBottom | RegionRight:
return HTBOTTOMRIGHT;
case RegionClient:
default:
if (cursor.y < (window.top + g_titleBarHeight * 2)) {
if (hoveredWindowName == "##MainMenuBar" || hoveredWindowName == "ImHexDockSpace") {
if (!ImGui::IsAnyItemHovered()) {
return HTCAPTION;
}
}
}
break;
}
break;
}
default:
break;
}
return commonWindowProc(hwnd, uMsg, wParam, lParam);
}
[[maybe_unused]]
static void reopenConsoleHandle(u32 stdHandleNumber, i32 stdFileDescriptor, FILE *stdStream) {
// Get the Windows handle for the standard stream
HANDLE handle = ::GetStdHandle(stdHandleNumber);
// Redirect the standard stream to the relevant console stream
if (stdFileDescriptor == STDIN_FILENO)
freopen("CONIN$", "rt", stdStream);
else
freopen("CONOUT$", "wt", stdStream);
// Disable buffering
setvbuf(stdStream, nullptr, _IONBF, 0);
// Reopen the standard stream as a file descriptor
auto unboundFd = [stdFileDescriptor, handle]{
if (stdFileDescriptor == STDIN_FILENO)
return _open_osfhandle(intptr_t(handle), _O_RDONLY);
else
return _open_osfhandle(intptr_t(handle), _O_WRONLY);
}();
// Duplicate the file descriptor to the standard stream
dup2(unboundFd, stdFileDescriptor);
}
void Window::initNative() {
if (ImHexApi::System::isDebugBuild()) {
// If the application is running in debug mode, ImHex runs under the CONSOLE subsystem,
// so we don't need to do anything besides enabling ANSI colors
log::impl::enableColorPrinting();
} else if (hex::getEnvironmentVariable("__IMHEX_FORWARD_CONSOLE__") == "1") {
// Check for the __IMHEX_FORWARD_CONSOLE__ environment variable that was set by the forwarder application
// If it's present, attach to its console window
::AttachConsole(ATTACH_PARENT_PROCESS);
// Reopen stdin, stdout and stderr to the console if not in debug mode
reopenConsoleHandle(STD_INPUT_HANDLE, STDIN_FILENO, stdin);
reopenConsoleHandle(STD_OUTPUT_HANDLE, STDOUT_FILENO, stdout);
// Explicitly don't forward stderr because some libraries like to write to it
// with no way to disable it (e.g., libmagic)
/*
reopenConsoleHandle(STD_ERROR_HANDLE, STDERR_FILENO, stderr);
*/
// Enable ANSI colors in the console
log::impl::enableColorPrinting();
} else {
log::impl::redirectToFile();
}
ImHexApi::System::impl::setBorderlessWindowMode(true);
// Add plugin library folders to dll search path
for (const auto &path : hex::fs::getDefaultPaths(fs::ImHexPath::Libraries)) {
if (std::fs::exists(path))
AddDllDirectory(path.c_str());
}
}
void Window::setupNativeWindow() {
// Setup borderless window
auto hwnd = glfwGetWin32Window(this->m_window);
bool borderlessWindowMode = ImHexApi::System::isBorderlessWindowModeEnabled();
// Set up the correct window procedure based on the borderless window mode state
if (borderlessWindowMode) {
g_oldWndProc = ::SetWindowLongPtr(hwnd, GWLP_WNDPROC, (LONG_PTR)borderlessWindowProc);
MARGINS borderless = { 1, 1, 1, 1 };
::DwmExtendFrameIntoClientArea(hwnd, &borderless);
DWORD attribute = DWMNCRP_ENABLED;
::DwmSetWindowAttribute(hwnd, DWMWA_NCRENDERING_POLICY, &attribute, sizeof(attribute));
::SetWindowPos(hwnd, nullptr, 0, 0, 0, 0, SWP_NOZORDER | SWP_NOOWNERZORDER | SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOMOVE);
::SetWindowLong(hwnd, GWL_STYLE, GetWindowLong(hwnd, GWL_STYLE) | WS_OVERLAPPEDWINDOW);
} else {
g_oldWndProc = ::SetWindowLongPtr(hwnd, GWLP_WNDPROC, (LONG_PTR)commonWindowProc);
}
// Add a custom exception handler to detect heap corruptions
{
::AddVectoredExceptionHandler(TRUE, [](PEXCEPTION_POINTERS exception) -> LONG {
if ((exception->ExceptionRecord->ExceptionCode & 0xF000'0000) == 0xC000'0000) {
log::fatal("Exception raised: 0x{:08X}", exception->ExceptionRecord->ExceptionCode);
if (exception->ExceptionRecord->ExceptionCode == STATUS_HEAP_CORRUPTION) {
log::fatal("Heap corruption detected!");
}
}
return EXCEPTION_CONTINUE_SEARCH;
});
}
// Set up a taskbar progress handler
{
if (SUCCEEDED(CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED))) {
CoCreateInstance(CLSID_TaskbarList, nullptr, CLSCTX_INPROC_SERVER, IID_ITaskbarList4, &g_taskbarList);
}
EventSetTaskBarIconState::subscribe([hwnd](u32 state, u32 type, u32 progress){
using enum ImHexApi::System::TaskProgressState;
switch (ImHexApi::System::TaskProgressState(state)) {
case Reset:
g_taskbarList->SetProgressState(hwnd, TBPF_NOPROGRESS);
g_taskbarList->SetProgressValue(hwnd, 0, 0);
break;
case Flash:
FlashWindow(hwnd, true);
break;
case Progress:
g_taskbarList->SetProgressState(hwnd, TBPF_INDETERMINATE);
g_taskbarList->SetProgressValue(hwnd, progress, 100);
break;
}
using enum ImHexApi::System::TaskProgressType;
switch (ImHexApi::System::TaskProgressType(type)) {
case Normal:
g_taskbarList->SetProgressState(hwnd, TBPF_NORMAL);
break;
case Warning:
g_taskbarList->SetProgressState(hwnd, TBPF_PAUSED);
break;
case Error:
g_taskbarList->SetProgressState(hwnd, TBPF_ERROR);
break;
}
});
}
struct ACCENTPOLICY {
u32 accentState;
u32 accentFlags;
u32 gradientColor;
u32 animationId;
};
struct WINCOMPATTRDATA {
int attribute;
PVOID pData;
ULONG dataSize;
};
EventThemeChanged::subscribe([this]{
auto hwnd = glfwGetWin32Window(this->m_window);
static auto user32Dll = WinUniquePtr<HMODULE>(LoadLibraryA("user32.dll"), FreeLibrary);
if (user32Dll != nullptr) {
using SetWindowCompositionAttributeFunc = BOOL(WINAPI*)(HWND, WINCOMPATTRDATA*);
const auto SetWindowCompositionAttribute =
(SetWindowCompositionAttributeFunc)
(void*)
GetProcAddress(user32Dll.get(), "SetWindowCompositionAttribute");
if (SetWindowCompositionAttribute != nullptr) {
ACCENTPOLICY policy = { ImGuiExt::GetCustomStyle().WindowBlur > 0.5F ? 4U : 0U, 0, ImGuiExt::GetCustomColorU32(ImGuiCustomCol_BlurBackground), 0 };
WINCOMPATTRDATA data = { 19, &policy, sizeof(ACCENTPOLICY) };
SetWindowCompositionAttribute(hwnd, &data);
}
}
});
}
void Window::beginNativeWindowFrame() {
g_titleBarHeight = ImGui::GetCurrentWindowRead()->MenuBarHeight();
}
void Window::endNativeWindowFrame() {
if (!ImHexApi::System::isBorderlessWindowModeEnabled())
return;
}
}
#endif
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