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windows.jai
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windows.jai
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// @Todo: handle WM_CANCELMODE
#import "Basic";
#scope_file
Win32 :: #import "Win32" (
Memory = true,
GDI_Basics = true,
Windows_And_Messaging = true,
Input = true,
HiDpi = true,
);
g_all_windows : [..]*Window;
g_wndclass : Win32.WNDCLASSEXW;
g_custom_caption_wndclass : Win32.WNDCLASSEXW;
g_cursors : struct
{
all : [SystemCursor.Count]Win32.HCURSOR;
#place all;
none : Win32.HCURSOR;
arrow : Win32.HCURSOR;
arrow_busy : Win32.HCURSOR;
busy : Win32.HCURSOR;
cross : Win32.HCURSOR;
hand : Win32.HCURSOR;
ibeam : Win32.HCURSOR;
size : Win32.HCURSOR;
size_nwse : Win32.HCURSOR;
size_nesw : Win32.HCURSOR;
size_horizontal : Win32.HCURSOR;
size_vertical : Win32.HCURSOR;
not_allowed : Win32.HCURSOR;
};
g_message_queue : [..]Message;
g_initialized : bool;
g_error_wide_buffer : [128]u16;
g_error_utf8_buffer : [512]u8;
GetLastErrorString :: inline () -> string #must
{
return GetErrorString(Win32.GetLastError());
}
GetErrorString :: inline (error_code : u32) -> string #must
{
wide_count := Win32.FormatMessageW (
.FORMAT_MESSAGE_FROM_SYSTEM | .FORMAT_MESSAGE_IGNORE_INSERTS,
null,
error_code,
Win32.MAKELANGID(0, 0),
g_error_wide_buffer.data,
g_error_wide_buffer.count,
null
);
utf8_count := Win32.WideCharToMultiByte(
Win32.CP_UTF8,
0,
g_error_wide_buffer.data,
cast(s32) wide_count,
cast(*u8) g_error_utf8_buffer.data,
g_error_utf8_buffer.count,
null,
null
);
result : string = ---;
result.data = g_error_utf8_buffer.data;
result.count = utf8_count;
return result;
}
// The result is null terminated even though a Jai string is returned
WideToUtf8 :: (data : *u16) -> string #must, success : bool
{
result_length := Win32.WideCharToMultiByte(Win32.CP_UTF8, 0, data, -1, null, 0, null, null);
if result_length <= 0
return "", false;
utf8_data := cast(*u8) alloc(result_length);
written := Win32.WideCharToMultiByte(Win32.CP_UTF8, 0, data, -1, utf8_data, result_length, null, null);
if written > 0
{
str : string = ---;
str.data = utf8_data;
str.count = written - 1;
return str, true;
}
return "", false;
}
// The result is null terminated
Utf8ToWide :: (utf8_str : string) -> wide_str : *u16 #must, length : s32
{
if !utf8_str
{
wide_str := cast(*u16) alloc(size_of(u16));
wide_str[0] = 0;
return wide_str, 0;
}
result_length := Win32.MultiByteToWideChar(Win32.CP_UTF8, 0, utf8_str.data, cast(s32) utf8_str.count, null, 0);
if result_length <= 0
return null, 0;
wide_str := cast(*u16) alloc((result_length + 1) * size_of(u16));
written := Win32.MultiByteToWideChar(Win32.CP_UTF8, 0, utf8_str.data, cast(s32) utf8_str.count, wide_str, result_length);
if written > 0
{
wide_str[written] = 0;
return wide_str, written;
}
return null, 0;
}
InitializeWindowClassesAndCursors :: ()
{
if g_initialized
return;
defer g_initialized = true;
{
using g_wndclass;
cbSize = size_of(Win32.WNDCLASSEXW);
style = .CS_DBLCLKS | .CS_OWNDC;
lpfnWndProc = xx WindowProc;
hInstance = Win32.GetModuleHandleW(null);
lpszClassName = Utf8ToWide("WindowClass");
ok := cast(bool) Win32.RegisterClassExW(*g_wndclass);
assert(ok, "RegisterClassExW for WindowClass failed: %", GetLastErrorString());
}
{
using g_custom_caption_wndclass;
cbSize = size_of(Win32.WNDCLASSEXW);
style = .CS_DBLCLKS | .CS_OWNDC;
lpfnWndProc = xx CustomCaptionWindowProc;
hInstance = Win32.GetModuleHandleW(null);
lpszClassName = Utf8ToWide("CustomCaptionWindowClass");
ok := cast(bool) Win32.RegisterClassExW(*g_custom_caption_wndclass);
assert(ok, "RegisterClassExW for CustomCaptionWindowClass failed: %", GetLastErrorString());
}
{
g_cursors.none = null;
g_cursors.arrow = Win32.LoadCursorW(null, Win32.IDC_ARROW);
g_cursors.arrow_busy = Win32.LoadCursorW(null, Win32.IDC_APPSTARTING);
g_cursors.busy = Win32.LoadCursorW(null, Win32.IDC_WAIT);
g_cursors.cross = Win32.LoadCursorW(null, Win32.IDC_CROSS);
g_cursors.hand = Win32.LoadCursorW(null, Win32.IDC_HAND);
g_cursors.ibeam = Win32.LoadCursorW(null, Win32.IDC_IBEAM);
g_cursors.size = Win32.LoadCursorW(null, Win32.IDC_SIZEALL);
g_cursors.size_nwse = Win32.LoadCursorW(null, Win32.IDC_SIZENWSE);
g_cursors.size_nesw = Win32.LoadCursorW(null, Win32.IDC_SIZENESW);
g_cursors.size_horizontal = Win32.LoadCursorW(null, Win32.IDC_SIZEWE);
g_cursors.size_vertical = Win32.LoadCursorW(null, Win32.IDC_SIZENS);
g_cursors.not_allowed = Win32.LoadCursorW(null, Win32.IDC_NO);
}
mouse : Win32.RAWINPUTDEVICE;
mouse.usUsagePage = 0x1;
mouse.usUsage = 0x2;
Win32.RegisterRawInputDevices(*mouse, 1, size_of(Win32.RAWINPUTDEVICE));
}
#scope_export
CaptionHitTestProc :: #type(*Window, mouse_x : s32, mouse_y : s32) -> on_caption : bool;
Window :: struct
{
hwnd : Win32.HWND;
flags : WindowFlags;
WM_CHAR_utf16_high_surrogate : u16;
caption_hit_test : CaptionHitTestProc;
mouse_is_outside : bool;
cursor := SystemCursor.Arrow;
}
GetPlatformHandle :: inline (window : *Window) -> *void #must #no_context
{
return window.hwnd;
}
GetWindowFromPlatformHandle :: inline (hwnd : *void) -> *Window #must #no_context
{
for g_all_windows
{
if it.hwnd == hwnd
return it;
}
return null;
}
ShowErrorBox :: inline (parent : *Window, fmt_str : string, args : ..Any)
{
auto_release_temp();
str := tprint(fmt_str, ..args);
Win32.MessageBoxW(
ifx parent then parent.hwnd else null,
Utf8ToWide(str,, temp),
null,
.MB_ICONERROR | .MB_OK
);
}
ShowErrorBox :: inline (fmt_str : string, args : ..Any)
{
ShowErrorBox(null, fmt_str, ..args);
}
GetDisplays :: inline () -> []DisplayInfo #must
{
CountDisplayMonitors :: (
monitor : Win32.HMONITOR,
device_context : Win32.HDC,
rect : *Win32.RECT,
user_data : s64
) -> Win32.BOOL #c_call
{
(cast(*s64) user_data).* += 1;
return 1;
}
UserData :: struct
{
displays : []DisplayInfo;
index : s64;
}
AddDisplay :: (
monitor : Win32.HMONITOR,
device_context : Win32.HDC,
rect : *Win32.RECT,
user_data : s64
) -> Win32.BOOL #c_call
{
monitor_info : Win32.MONITORINFO;
monitor_info.cbSize = size_of(Win32.MONITORINFO);
Win32.GetMonitorInfoW(monitor, *monitor_info);
using data := (cast(*UserData) user_data);
if index >= displays.count
return 0;
displays[index].is_primary = (monitor_info.dwFlags & Win32.MONITORINFOF_PRIMARY) == Win32.MONITORINFOF_PRIMARY;
displays[index].x = monitor_info.rcMonitor.left;
displays[index].y = monitor_info.rcMonitor.top;
displays[index].w = monitor_info.rcMonitor.right - monitor_info.rcMonitor.left;
displays[index].h = monitor_info.rcMonitor.bottom - monitor_info.rcMonitor.top;
// https://learn.microsoft.com/en-us/windows/win32/api/shellscalingapi/nf-shellscalingapi-getdpiformonitor
// "The values of *dpiX and *dpiY are identical. You only need to record
// one of the values to determine the DPI and respond appropriately."
dpi_x : u32;
if Win32.GetDpiForMonitor(monitor, .MDT_EFFECTIVE_DPI, *dpi_x, null) == 0
displays[index].dpi = xx dpi_x;
else
displays[index].dpi = 96;
index += 1;
return 1;
}
count := 0;
Win32.EnumDisplayMonitors(null, null, CountDisplayMonitors, cast(s64) *count);
user_data : UserData;
user_data.displays = NewArray(count, DisplayInfo);
Win32.EnumDisplayMonitors(null, null, AddDisplay, cast(s64) *user_data);
return user_data.displays;
}
CreateWindowExtraParams :: struct
{
caption_hit_test : CaptionHitTestProc;
}
CreateWindow :: (
title : string,
width : s32, height : s32,
x : s32 = Window_Default_Pos, y : s32 = Window_Default_Pos,
flags : WindowFlags = 0,
parent : *Window = null,
extra : CreateWindowExtraParams = .{}
) -> *Window #must
{
if !g_initialized
InitializeWindowClassesAndCursors();
if x == Window_Default_Pos
x = Win32.CW_USEDEFAULT;
if y == Window_Default_Pos
y = Win32.CW_USEDEFAULT;
if width == Window_Default_Size
width = Win32.CW_USEDEFAULT;
if height == Window_Default_Size
height = Win32.CW_USEDEFAULT;
wndclass := ifx flags & .Custom_Caption then *g_custom_caption_wndclass else *g_wndclass;
style : Win32.WINDOW_STYLE = .WS_OVERLAPPEDWINDOW;
ex_style : Win32.WINDOW_EX_STYLE = .WS_EX_APPWINDOW;
if flags & .Borderless
style = .WS_POPUP;
else if flags & .Custom_Caption
style = .WS_THICKFRAME | .WS_SYSMENU | .WS_MAXIMIZEBOX | .WS_MINIMIZEBOX;
if !(flags & .Hidden)
style |= .WS_VISIBLE;
if flags & .No_Taskbar_Icon
ex_style = .WS_EX_TOOLWINDOW;
if flags & .Topmost
ex_style |= .WS_EX_TOPMOST;
if flags & .No_Resize
style ^= .WS_THICKFRAME | .WS_MAXIMIZEBOX;
rect : Win32.RECT;
if x != Win32.CW_USEDEFAULT
rect.left = x;
if y != Win32.CW_USEDEFAULT
rect.top = y;
rect.right = rect.left + width;
rect.bottom = rect.top + height;
Win32.AdjustWindowRect(*rect, style, 0);
if x != Win32.CW_USEDEFAULT
x = rect.left;
if y != Win32.CW_USEDEFAULT
y = rect.top;
width = rect.right - rect.left;
height = rect.bottom - rect.top;
hwnd := Win32.CreateWindowExW(
ex_style,
wndclass.lpszClassName,
Utf8ToWide(title,, temp),
style,
x,
y,
width,
height,
ifx parent then parent.hwnd else null,
null,
Win32.GetModuleHandleW(null),
null
);
// Watch for the next event event
track : Win32.TRACKMOUSEEVENT;
track.cbSize = size_of(Win32.TRACKMOUSEEVENT);
track.hwndTrack = hwnd;
track.dwFlags = 0x02;
Win32.TrackMouseEvent(*track);
window := New(Window);
window.hwnd = hwnd;
window.caption_hit_test = extra.caption_hit_test;
window.flags = flags;
Win32.SetWindowLongPtrW(hwnd, .GWLP_USERDATA, cast(s64) window);
array_add(*g_all_windows, window);
return window;
}
DestroyWindow :: inline (window : *Window) #no_context
{
// This just posts a WM_DESTROY message, freeing the window happens
// when handling that message
Win32.DestroyWindow(window.hwnd);
}
CloseWindow :: inline (window : *Window) #no_context
{
Win32.PostMessageW(window.hwnd, Win32.WM_CLOSE, 0, 0);
}
GetWindowTitle :: inline (window : *Window) -> string #must
{
len := Win32.GetWindowTextLengthW(window.hwnd) + 2;
wide_buffer := cast(*u16) alloc(size_of(u16) * len,, temp);
Win32.GetWindowTextW(window.hwnd, wide_buffer, len);
return WideToUtf8(wide_buffer);
}
SetWindowTitle :: inline (window : *Window, title : string)
{
wide_title := Utf8ToWide(title,, temp);
Win32.SetWindowTextW(window.hwnd, wide_title);
}
// @Todo
GetWindowScaleFactor :: inline (window : *Window) -> float #must #no_context
{
return 1;
}
GetWindowPosition :: inline (window : *Window) -> x : s32, y : s32 #no_context
{
rect : Win32.RECT;
Win32.GetWindowRect(window.hwnd, *rect);
return rect.left, rect.top;
}
SetWindowPosition :: inline (window : *Window, x : s32, y : s32) #no_context
{
Win32.SetWindowPos(window.hwnd, null, x, y, 0, 0, .SWP_NOSIZE | .SWP_NOZORDER | .SWP_NOACTIVATE);
}
GetWindowSize :: inline (window : *Window) -> width : s32, height : s32 #no_context
{
rect : Win32.RECT;
Win32.GetWindowRect(window.hwnd, *rect);
return rect.right - rect.left, rect.bottom - rect.top;
}
SetWindowSize :: inline (window : *Window, width : s32, height : s32) #no_context
{
Win32.SetWindowPos(window.hwnd, null, 0, 0, width, height, .SWP_NOMOVE | .SWP_NOZORDER | .SWP_NOACTIVATE);
}
GetViewportPosition :: inline (window : *Window) -> width : s32, height : s32 #no_context
{
x, y := WindowToScreenPosition(window, 0, 0);
return x, y;
}
SetViewportPosition :: inline (window : *Window, x : s32, y : s32) #no_context
{
style := cast, no_check(Win32.WINDOW_STYLE) Win32.GetWindowLongW(window.hwnd, .GWL_STYLE);
ex_style := cast, no_check(Win32.WINDOW_EX_STYLE) Win32.GetWindowLongW(window.hwnd, .GWL_EXSTYLE);
rect := Win32.RECT.{x, y, x, y};
Win32.AdjustWindowRectEx(*rect, style, 0, ex_style);
Win32.SetWindowPos(window.hwnd, null, rect.left, rect.top, 0, 0, .SWP_NOZORDER | .SWP_NOSIZE | .SWP_NOACTIVATE);
}
GetViewportSize :: inline (window : *Window) -> width : s32, height : s32 #no_context
{
rect : Win32.RECT;
Win32.GetClientRect(window.hwnd, *rect);
return rect.right - rect.left, rect.bottom - rect.top;
}
GetViewportSizeInPixels :: inline (window : *Window) -> width : s32, height : s32 #no_context
{
scale := GetWindowScaleFactor(window);
w, h := GetViewportSize(window);
return xx (w * scale), xx (h * scale);
}
SetViewportSize :: inline (window : *Window, width : s32, height : s32) #no_context
{
style := cast, no_check(Win32.WINDOW_STYLE) Win32.GetWindowLongW(window.hwnd, .GWL_STYLE);
ex_style := cast, no_check(Win32.WINDOW_EX_STYLE) Win32.GetWindowLongW(window.hwnd, .GWL_EXSTYLE);
rect := Win32.RECT.{0, 0, width, height};
Win32.AdjustWindowRectEx(*rect, style, 0, ex_style);
Win32.SetWindowPos(window.hwnd, null, 0, 0, rect.right - rect.left, rect.bottom - rect.top, .SWP_NOZORDER | .SWP_NOMOVE | .SWP_NOACTIVATE);
}
GetFocusedWindow :: () -> *Window #must, non_fenetres_window_focused : bool #no_context
{
focused := Win32.GetFocus();
if !focused
return null, false;
for g_all_windows
{
if focused == it.hwnd
return it, false;
}
return null, true;
}
SetFocusedWindow :: inline (window : *Window) #no_context
{
Win32.SetFocus(window.hwnd);
}
IsFocused :: inline (window : *Window) -> bool #must #no_context
{
return GetFocusedWindow() == window;
}
IsMaximized :: inline (window : *Window) -> bool #must #no_context
{
placement : Win32.WINDOWPLACEMENT;
placement.length = size_of(Win32.WINDOWPLACEMENT);
if Win32.GetWindowPlacement(window.hwnd, *placement)
return placement.showCmd == .SW_SHOWMAXIMIZED;
return false;
}
IsMinimized :: inline (window : *Window) -> bool #must #no_context
{
placement : Win32.WINDOWPLACEMENT;
placement.length = size_of(Win32.WINDOWPLACEMENT);
if Win32.GetWindowPlacement(window.hwnd, *placement)
return placement.showCmd == .SW_SHOWMINIMIZED;
return false;
}
Maximize :: inline (window : *Window) #no_context
{
Win32.ShowWindow(window.hwnd, .SW_MAXIMIZE);
}
Restore :: inline (window : *Window) #no_context
{
Win32.ShowWindow(window.hwnd, .SW_RESTORE);
}
Minimize :: inline (window : *Window) #no_context
{
Win32.ShowWindow(window.hwnd, .SW_MINIMIZE);
}
SetWindowVisibility :: inline (window : *Window, visible : bool) #no_context
{
if visible
Win32.ShowWindow(window.hwnd, .SW_SHOWNA);
else
Win32.ShowWindow(window.hwnd, .SW_HIDE);
}
ShowAndFocusWindow :: inline (window : *Window) #no_context
{
Win32.ShowWindow(window.hwnd, .SW_SHOW);
}
GetMousePosition :: inline () -> x : s32, y : s32 #no_context
{
result : Win32.POINT;
Win32.GetCursorPos(*result);
return result.x, result.y;
}
SetMousePosition :: inline (x : s32, y : s32) #no_context
{
p : Win32.POINT;
p.x = x;
p.y = y;
Win32.SetCursorPos(p.x, p.y);
}
ScreenToWindowPosition :: inline (window : *Window, x : s32, y : s32) -> x : s32, y : s32 #no_context
{
result := Win32.POINT.{x,y};
Win32.ScreenToClient(window.hwnd, *result);
return result.x, result.y;
}
WindowToScreenPosition :: inline (window : *Window, x : s32, y : s32) -> x : s32, y : s32 #no_context
{
result := Win32.POINT.{x,y};
Win32.ClientToScreen(window.hwnd, *result);
return result.x, result.y;
}
GetMousePosition :: inline (window : *Window) -> x : s32, y : s32 #no_context
{
result : Win32.POINT;
Win32.GetCursorPos(*result);
Win32.ScreenToClient(window.hwnd, *result);
return result.x, result.y;
}
SetMousePosition :: inline (window : *Window, x : s32, y : s32) #no_context
{
p : Win32.POINT;
p.x = x;
p.y = y;
Win32.ClientToScreen(window, *p);
Win32.SetCursorPos(p.x, p.y);
}
SetMouseCapture :: inline (window : *Window, capture : bool) #no_context
{
if capture
Win32.SetCapture(window.hwnd);
else
Win32.ReleaseCapture();
}
GetMouseCapture :: inline () -> *Window #must, non_fenetres_window : bool #no_context
{
hwnd := Win32.GetCapture();
if !hwnd
return null, false;
window := GetWindowFromPlatformHandle(hwnd);
if !window
return null, true;
return window, false;
}
PollMessages :: () -> []Message
{
g_message_queue.count = 0;
windows_msg : Win32.MSG;
while Win32.PeekMessageW(*windows_msg, null, 0, 0, .PM_REMOVE)
{
Win32.TranslateMessage(*windows_msg);
Win32.DispatchMessageW(*windows_msg);
}
return g_message_queue;
}
#scope_file
g_show_cursor : bool;
#scope_export
SetCursorVisibility :: inline (visible : bool) #no_context
#deprecated "Use SetCursor(window, .None) instead"
{
if g_show_cursor == visible
return;
// This function does not behave like expected: see https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-showcursor
// "If bShow is TRUE, the display count is incremented by one. If bShow is FALSE, the display count is decremented by one."
Win32.ShowCursor(xx visible);
g_show_cursor = visible;
}
SetCursor :: inline (window : *Window, cursor : SystemCursor) #no_context
{
if window.cursor != cursor
Win32.SetCursor(g_cursors.all[cursor]);
window.cursor = cursor;
}
SetCursorConstraint :: inline (x : s32, y : s32, w : s32, h : s32) -> bool #no_context
{
rect : Win32.RECT = ---;
rect.left = x;
rect.top = y;
rect.right = x + w;
rect.bottom = y + h;
return Win32.ClipCursor(*rect) != 0;
}
RemoveCursorConstraint :: inline () -> bool #no_context
{
return Win32.ClipCursor(null) != 0;
}
VKToMouseButton :: inline (vk : Win32.VIRTUAL_KEY) -> MouseButton #must #no_context
{
if vk ==
{
case .VK_LBUTTON;
return .Left;
case .VK_RBUTTON;
return .Right;
case .VK_MBUTTON;
return .Middle;
}
return .Invalid;
}
MouseButtonToVK :: inline (button : MouseButton) -> Win32.VIRTUAL_KEY #must #no_context
{
if button ==
{
case .Left;
return .VK_LBUTTON;
case .Right;
return .VK_RBUTTON;
case .Middle;
return .VK_MBUTTON;
}
return xx 0;
}
VKToKeyCode :: (vk : Win32.VIRTUAL_KEY) -> KeyCode #must #no_context
{
#insert -> string
{
builder : String_Builder;
append(*builder, "if vk ==\n{\n");
for VK_To_Key_Code_Map
{
print_to_builder(*builder, "case .%; return .%;\n", it.vk, it.key_code);
}
append(*builder, "}\n");
return builder_to_string(*builder);
};
return .Invalid;
}
KeyCodeToVK :: (key_code : KeyCode) -> Win32.VIRTUAL_KEY #must #no_context
{
#insert -> string
{
builder : String_Builder;
append(*builder, "if key_code ==\n{\n");
for VK_To_Key_Code_Map
{
print_to_builder(*builder, "case .%; return .%;\n", it.key_code, it.vk);
}
append(*builder, "}\n");
return builder_to_string(*builder);
};
return 0;
}
GetKeyModState :: inline () -> KeyMods #must #no_context
{
result : KeyMods;
if (Win32.GetAsyncKeyState(xx Win32.VIRTUAL_KEY.VK_CONTROL) & 0x8000) != 0
result |= .Ctrl;
if (Win32.GetAsyncKeyState(xx Win32.VIRTUAL_KEY.VK_SHIFT) & 0x8000) != 0
result |= .Shift;
if (Win32.GetAsyncKeyState(xx Win32.VIRTUAL_KEY.VK_MENU) & 0x8000) != 0
result |= .Alt;
return result;
}
GetClipboardTextData :: () -> string #must
{
if !Win32.OpenClipboard(null)
return "";
defer Win32.CloseClipboard();
data := Win32.GetClipboardData(xx Win32.CLIPBOARD_FORMATS.CF_UNICODETEXT);
if !data
return "";
buffer := Win32.GlobalLock(cast(s64) data);
defer Win32.GlobalUnlock(cast(s64) data);
return WideToUtf8(buffer);
}
SetClipboardTextData :: (text : string)
{
if !Win32.OpenClipboard(null)
return;
defer Win32.CloseClipboard();
wide_str, wide_len := Utf8ToWide(text,, temp);
clipbuffer := cast(*void) Win32.GlobalAlloc(0, xx (wide_len * 2 + 2));
buffer := Win32.GlobalLock(cast(s64) clipbuffer);
memcpy(buffer, wide_str, wide_len * 2 + 2);
Win32.GlobalUnlock(cast(s64) clipbuffer);
Win32.SetClipboardData(xx Win32.CLIPBOARD_FORMATS.CF_UNICODETEXT, clipbuffer);
}
ClearClipboard :: inline ()
{
if !Win32.OpenClipboard(null)
return;
Win32.EmptyClipboard();
Win32.CloseClipboard();
}
#scope_file
Keystroke :: struct
{
repeat_count : s16;
scan_code : u8;
extended : bool;
previous_key_state : bool;
transition_state : bool;
alt_down : bool;
dialog_mode : bool;
menu_mode : bool;
}
DecomposeKeystrokeParam :: inline (lparam : Win32.LPARAM) -> Keystroke #must
{
using result : Keystroke;
repeat_count = Win32.LOWORD(lparam);
scan_code = cast, no_check(u8) Win32.HIWORD(lparam);
extended = (Win32.HIWORD(lparam) & Win32.KF_EXTENDED) == Win32.KF_EXTENDED;
previous_key_state = (Win32.HIWORD(lparam) & Win32.KF_REPEAT) == Win32.KF_REPEAT;
transition_state = (Win32.HIWORD(lparam) & Win32.KF_UP) == Win32.KF_UP;
alt_down = (Win32.HIWORD(lparam) & Win32.KF_ALTDOWN) == Win32.KF_ALTDOWN;
dialog_mode = (Win32.HIWORD(lparam) & Win32.KF_DLGMODE) == Win32.KF_DLGMODE;
menu_mode = (Win32.HIWORD(lparam) & Win32.KF_MENUMODE) == Win32.KF_MENUMODE;
return result;
}
WindowProc :: (hwnd : Win32.HWND, msg : u32, wparam : Win32.WPARAM, lparam : Win32.LPARAM) -> Win32.LRESULT
#c_call
{
window := cast(*Window) Win32.GetWindowLongPtrW(hwnd, .GWLP_USERDATA);
if !window
return Win32.DefWindowProcW(hwnd, msg, wparam, lparam);
window_message : Message;
window_message.window = window;
ctx : Context;
push_context ctx
{
if msg ==
{
case Win32.WM_DESTROY;
for g_all_windows
{
if it == window
{
remove it;
break;
}
}
free(window);
Win32.SetWindowLongPtrW(hwnd, .GWLP_USERDATA, cast(s64) null);
case Win32.WM_MOVE;
window_message.kind = .Window_Moved;
window_message.window_x = Win32.LOWORD(lparam);
window_message.window_y = Win32.HIWORD(lparam);
array_add(*g_message_queue, window_message);
case Win32.WM_SIZE;
if wparam ==
{
case Win32.SIZE_RESTORED;
window_message.kind = .Window_Resized;
case Win32.SIZE_MINIMIZED;
window_message.kind = .Window_Minimized;
case Win32.SIZE_MAXIMIZED;
window_message.kind = .Window_Maximized;
}
window_message.viewport_w = Win32.LOWORD(lparam);
window_message.viewport_h = Win32.HIWORD(lparam);
array_add(*g_message_queue, window_message);
case Win32.WM_CLOSE;
window_message.kind = .Window_Closed;
array_add(*g_message_queue, window_message);
case Win32.WM_SHOWWINDOW;
if wparam
window_message.kind = .Window_Shown;
else
window_message.kind = .Window_Hidden;
array_add(*g_message_queue, window_message);
case Win32.WM_SETFOCUS;
window_message.kind = .Window_Received_Focus;
array_add(*g_message_queue, window_message);
case Win32.WM_KILLFOCUS;
window_message.kind = .Window_Lost_Focus;
array_add(*g_message_queue, window_message);
case Win32.WM_CHAR;
codepoint := cast(u32) wparam;
Utf16_Hi_Surrogate :: cast(u16) 0xd800;
Utf16_Lo_Surrogate :: cast(u16) 0xdc00;
Utf16_Surrogate_End :: cast(u16) 0xdfff;
if codepoint >= Utf16_Hi_Surrogate && codepoint < Utf16_Lo_Surrogate
{
window.WM_CHAR_utf16_high_surrogate = cast(u16) codepoint;
}
else
{
if codepoint >= Utf16_Lo_Surrogate && codepoint <= Utf16_Surrogate_End
{
low_surrogate := cast(u16) codepoint;
codepoint = (window.WM_CHAR_utf16_high_surrogate - Utf16_Hi_Surrogate) << 10;
codepoint += (low_surrogate - Utf16_Lo_Surrogate);
codepoint += 0x10000;
}
if codepoint > 31 && codepoint != 127
{
window_message.kind = .Text_Input;
window_message.mods = GetKeyModState();
window_message.codepoint = codepoint;
array_add(*g_message_queue, window_message);
}
}
case Win32.WM_SYSKEYDOWN; #through;
case Win32.WM_SYSKEYUP; #through;
case Win32.WM_KEYDOWN; #through;
case Win32.WM_KEYUP;
using keystroke := DecomposeKeystrokeParam(lparam);
if msg == Win32.WM_KEYUP || msg == Win32.WM_SYSKEYUP
window_message.kind = .Key_Released;
else if previous_key_state
window_message.kind = .Key_Repeated;
else
window_message.kind = .Key_Pressed;
window_message.mods = GetKeyModState();
if wparam == xx Win32.VIRTUAL_KEY.VK_CONTROL
{
wparam = xx ifx !extended then Win32.VIRTUAL_KEY.VK_LCONTROL else Win32.VIRTUAL_KEY.VK_RCONTROL;
}
else if wparam == xx Win32.VIRTUAL_KEY.VK_MENU
{
wparam = xx ifx !extended then Win32.VIRTUAL_KEY.VK_LMENU else Win32.VIRTUAL_KEY.VK_RMENU;
}
else if wparam == xx Win32.VIRTUAL_KEY.VK_SHIFT
{
wparam = Win32.MapVirtualKeyW(scan_code, Win32.MAPVK_VSC_TO_VK_EX);
}
window_message.key_code = VKToKeyCode(xx wparam);
array_add(*g_message_queue, window_message);
if msg == Win32.WM_SYSKEYDOWN || msg == Win32.WM_SYSKEYUP
return Win32.DefWindowProcW(hwnd, msg, wparam, lparam);
case Win32.WM_LBUTTONDOWN;
window_message.kind = .Mouse_Button_Pressed;
window_message.mouse_button = .Left;
window_message.mods = GetKeyModState();
window_message.mouse_x, window_message.mouse_y = Win32.LOWORD(lparam), Win32.HIWORD(lparam);
array_add(*g_message_queue, window_message);
case Win32.WM_RBUTTONDOWN;
window_message.kind = .Mouse_Button_Pressed;
window_message.mouse_button = .Right;
window_message.mods = GetKeyModState();
window_message.mouse_x, window_message.mouse_y = Win32.LOWORD(lparam), Win32.HIWORD(lparam);
array_add(*g_message_queue, window_message);
case Win32.WM_MBUTTONDOWN;
window_message.kind = .Mouse_Button_Pressed;
window_message.mouse_button = .Middle;
window_message.mods = GetKeyModState();
window_message.mouse_x, window_message.mouse_y = Win32.LOWORD(lparam), Win32.HIWORD(lparam);
array_add(*g_message_queue, window_message);
case Win32.WM_LBUTTONUP;