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为什么 X 不以与 Mod1 不同的方式对待 ALT_L 和 ALT_R

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为什么 X 不以与 Mod1 不同的方式对待 ALT_L 和 ALT_R

Mod1我已将via的定义更改xmodmap为不包含ALT_R（以了解为什么滚动到底部）。修改器的当前布局如下。尽管ALT_R不参与 的定义mod1，但由 生成的记录xev显示，当按下任一 Alt 键时，KeyEvent.state被设置为mod1Mask（在 中定义为 8 ）。/usr/include/X11/X.h

如果xmodmask说不是ALT_R，mod1为什么X报告ALT_R+f好像是？

xmodmap:  up to 4 keys per modifier, (keycodes in parentheses):

shift       Shift_L (0x32),  Shift_R (0x3e)
lock        Caps_Lock (0x42)
control     Control_L (0x25),  Control_R (0x69)
mod1        Alt_L (0x40),  Meta_L (0xcd)
mod2        Num_Lock (0x4d)
mod3      
mod4        Super_L (0x85),  Super_R (0x86),  Super_L (0xce),  Hyper_L (0xcf)
mod5        ISO_Level3_Shift (0x5c),  Mode_switch (0xcb)

以下序列是ALT_L+f后接ALT_R+ f。

KeyPress event, serial 32, synthetic NO, window 0x1000001,
    root 0xc0, subw 0x0, time 4126632, (85,488), root:(86,489),
    state 0x0, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 32, synthetic NO, window 0x1000001,
    root 0xc0, subw 0x0, time 4126850, (85,488), root:(86,489),
    state 0x8, keycode 41 (keysym 0x66, f), same_screen YES,
    XLookupString gives 1 bytes: (66) "f"
    XmbLookupString gives 1 bytes: (66) "f"
    XFilterEvent returns: False

KeyRelease event, serial 32, synthetic NO, window 0x1000001,
    root 0xc0, subw 0x0, time 4126930, (85,488), root:(86,489),
    state 0x8, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 32, synthetic NO, window 0x1000001,
    root 0xc0, subw 0x0, time 4126969, (85,488), root:(86,489),
    state 0x0, keycode 41 (keysym 0x66, f), same_screen YES,
    XLookupString gives 1 bytes: (66) "f"
    XFilterEvent returns: False

KeyPress event, serial 32, synthetic NO, window 0x1000001,
    root 0xc0, subw 0x0, time 4127907, (85,488), root:(86,489),
    state 0x0, keycode 108 (keysym 0xffea, Alt_R), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 32, synthetic NO, window 0x1000001,
    root 0xc0, subw 0x0, time 4128123, (85,488), root:(86,489),
    state 0x8, keycode 41 (keysym 0x66, f), same_screen YES,
    XLookupString gives 1 bytes: (66) "f"
    XmbLookupString gives 1 bytes: (66) "f"
    XFilterEvent returns: False

KeyRelease event, serial 32, synthetic NO, window 0x1000001,
    root 0xc0, subw 0x0, time 4128164, (85,488), root:(86,489),
    state 0x8, keycode 108 (keysym 0xffea, Alt_R), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 32, synthetic NO, window 0x1000001,
    root 0xc0, subw 0x0, time 4128203, (85,488), root:(86,489),
    state 0x0, keycode 41 (keysym 0x66, f), same_screen YES,
    XLookupString gives 1 bytes: (66) "f"
    XFilterEvent returns: False

背景:

ALT_R我有一个使用+ENTER来执行功能的应用程序。在 Xmonad 中使用此应用程序时，组合Mod1+ENTER会触发“将当前窗口与主窗口交换”功能。默认情况下，ALT_L和ALT_R映射到Mod1.

在我的 中.xinitrc，在启动 Xmonad 之前，我已经更改了我的键映射，xmodmap这ALT_R不是Mod1定义的一部分。尽管如此，Xmonad 在输入ALT_R+时仍然执行窗口交换行为ENTER。 Xmonad 似乎不知道Mod1不再包含ALT_R.

这是我的.xinitrc

# Java's GUI can't handle some non-reparenting window managers like
# Xmonad without being told how to behave
export _JAVA_AWT_WM_NONREPARENTING=1

# The right Alt key is useful in IntelliJ, tell Xmonad to ignore it
xmodmap ~/.Xmodmap

# Start Xmonad
xmonad

xmodmap这是上面 Xmonad 启动后的输出。

我已经记录了该序列xev并确认该ENTER序列从未注册过。相反，在记录后会发生多个FocusIn/FocusOut事件。ALT_R

KeyPress event, serial 32, synthetic NO, window 0x1200001,
    root 0xc0, subw 0x0, time 1432589, (92,374), root:(93,375),
    state 0x0, keycode 108 (keysym 0xffea, Alt_R), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

FocusOut event, serial 32, synthetic NO, window 0x1200001,
    mode NotifyGrab, detail NotifyAncestor

PropertyNotify event, serial 32, synthetic NO, window 0x1200001,
    atom 0x155 (WM_STATE), time 1433760, state PropertyNewValue

FocusOut event, serial 32, synthetic NO, window 0x1200001,
    mode NotifyUngrab, detail NotifyPointer

FocusIn event, serial 32, synthetic NO, window 0x1200001,
    mode NotifyUngrab, detail NotifyAncestor

KeymapNotify event, serial 32, synthetic NO, window 0x0,
    keys:  0   0   0   0   0   0   0   0   0   0   0   0   0   16  0   0   
           0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   

KeyRelease event, serial 32, synthetic NO, window 0x1200001,
    root 0xc0, subw 0x0, time 1434117, (92,374), root:(93,375),
    state 0x8, keycode 108 (keysym 0xffea, Alt_R), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

答案1

似乎如果 Alt_R 未分配给任何其他修饰符，则它默认为 Mod1Mask。

简单地取消绑定 Xmodmap 中的正确 alt 不足以让它停止报告状态 0x8，我必须将其绑定到另一个修饰符（我选择 Mod3，因为它无论如何都是空的），然后 xev 开始报告状态 0x20。

尽管它更多的是一种解决方法而不是解决方案。

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