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Win32: Fix scancode when key message only had VK

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Some synthetic key messages come with a scancode of zero, causing them
to be translate to GLFW_KEY_UNKNOWN.  This fills in the missing scancode
by translating the provided virtual key.

Rather than further complicate a single-use function, its body is merged
into the key message handler.

Fixes #1623.

(cherry picked from commit 789a2bcb39)
This commit is contained in:
Camilla Löwy 2020-01-15 18:54:42 +01:00
parent ec28696994
commit e53538010a
2 changed files with 56 additions and 54 deletions
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2
README.md
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@ -121,6 +121,8 @@ information on what to include when reporting a bug.
- [Win32] Bugfix: Super key was not released after Win+V hotkey (#1622)
- [Win32] Bugfix: `glfwGetKeyName` could access out of bounds and return an
invalid pointer
- [Win32] Bugfix: Some synthetic key events were reported as `GLFW_KEY_UNKNOWN`
(#1623)
- [Cocoa] Added support for `VK_EXT_metal_surface` (#1619)
- [Cocoa] Added locating the Vulkan loader at runtime in an application bundle
- [X11] Bugfix: `glfwFocusWindow` could terminate on older WMs or without a WM

108
src/win32_window.c
View File

@ -36,8 +36,6 @@
#include <windowsx.h>
#include <shellapi.h>
#define _GLFW_KEY_INVALID -2
// Returns the window style for the specified window
//
static DWORD getWindowStyle(const _GLFWwindow* window)
@ -448,55 +446,6 @@ static int getKeyMods(void)
return mods;
}
// Translates a Windows key to the corresponding GLFW key
//
static int translateKey(WPARAM wParam, LPARAM lParam)
{
// The Ctrl keys require special handling
if (wParam == VK_CONTROL)
{
MSG next;
DWORD time;
// Right side keys have the extended key bit set
if (HIWORD(lParam) & KF_EXTENDED)
return GLFW_KEY_RIGHT_CONTROL;
// HACK: Alt Gr sends Left Ctrl and then Right Alt in close sequence
// We only want the Right Alt message, so if the next message is
// Right Alt we ignore this (synthetic) Left Ctrl message
time = GetMessageTime();
if (PeekMessageW(&next, NULL, 0, 0, PM_NOREMOVE))
{
if (next.message == WM_KEYDOWN ||
next.message == WM_SYSKEYDOWN ||
next.message == WM_KEYUP ||
next.message == WM_SYSKEYUP)
{
if (next.wParam == VK_MENU &&
(HIWORD(next.lParam) & KF_EXTENDED) &&
next.time == time)
{
// Next message is Right Alt down so discard this
return _GLFW_KEY_INVALID;
}
}
}
return GLFW_KEY_LEFT_CONTROL;
}
if (wParam == VK_PROCESSKEY)
{
// IME notifies that keys have been filtered by setting the virtual
// key-code to VK_PROCESSKEY
return _GLFW_KEY_INVALID;
}
return _glfw.win32.keycodes[HIWORD(lParam) & 0x1FF];
}
static void fitToMonitor(_GLFWwindow* window)
{
MONITORINFO mi = { sizeof(mi) };
@ -717,13 +666,64 @@ static LRESULT CALLBACK windowProc(HWND hWnd, UINT uMsg,
case WM_KEYUP:
case WM_SYSKEYUP:
{
const int key = translateKey(wParam, lParam);
const int scancode = (HIWORD(lParam) & 0x1ff);
int key, scancode;
const int action = (HIWORD(lParam) & KF_UP) ? GLFW_RELEASE : GLFW_PRESS;
const int mods = getKeyMods();
if (key == _GLFW_KEY_INVALID)
scancode = (HIWORD(lParam) & (KF_EXTENDED | 0xff));
if (!scancode)
{
// NOTE: Some synthetic key messages have a scancode of zero
// HACK: Map the virtual key back to a usable scancode
scancode = MapVirtualKeyW((UINT) wParam, MAPVK_VK_TO_VSC);
}
key = _glfw.win32.keycodes[scancode];
// The Ctrl keys require special handling
if (wParam == VK_CONTROL)
{
if (HIWORD(lParam) & KF_EXTENDED)
{
// Right side keys have the extended key bit set
key = GLFW_KEY_RIGHT_CONTROL;
}
else
{
// NOTE: Alt Gr sends Left Ctrl followed by Right Alt
// HACK: We only want one event for Alt Gr, so if we detect
// this sequence we discard this Left Ctrl message now
// and later report Right Alt normally
MSG next;
const DWORD time = GetMessageTime();
if (PeekMessageW(&next, NULL, 0, 0, PM_NOREMOVE))
{
if (next.message == WM_KEYDOWN ||
next.message == WM_SYSKEYDOWN ||
next.message == WM_KEYUP ||
next.message == WM_SYSKEYUP)
{
if (next.wParam == VK_MENU &&
(HIWORD(next.lParam) & KF_EXTENDED) &&
next.time == time)
{
// Next message is Right Alt down so discard this
break;
}
}
}
// This is a regular Left Ctrl message
key = GLFW_KEY_LEFT_CONTROL;
}
}
else if (wParam == VK_PROCESSKEY)
{
// IME notifies that keys have been filtered by setting the
// virtual key-code to VK_PROCESSKEY
break;
}
if (action == GLFW_RELEASE && wParam == VK_SHIFT)
{