Games under Wayland/SDL receive keyboard events when mouse focus changes in and out

[jwangac]

Summary

以窗口模式运行 Moonlight（串流软件）和 Factorio（异星工厂）时，在鼠标移动或在游戏和其他窗口之间切换焦点时，游戏窗口获得焦点时会产生 Ctrl、Alt、Shift 键的按下事件，表现为游戏认为这些键被长按。当游戏窗口失去焦点时，则会产生这些键的弹起事件。

在 Ctrl、Alt、Shift 中，哪些键会被触发没有发现规律，但 Ctrl 的频率最高，Alt 和 Shift 很少出现。

运行 killall fcitx5 或者卸载 fcitx5，可以解决这一问题。

故障演示视频如下。

record.mp4

Steps to Reproduce

1. 运行环境为 Debian testing / Sway 1.9 （禁用XWayland）；
2. 运行Moonlight（来自Flathub）或异星工厂；
3. 在窗口间切换焦点、新建窗口、关闭窗口以触发此问题。

Expected Behavior

正确时的SDL事件：

移入鼠标，SDL程序获得焦点：

00:01:19 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=79973 windowid=2 event=SDL_WINDOWEVENT_FOCUS_GAINED data1=0 data2=0)
00:01:19 - SDL Info (0): SDL EVENT: SDL_CLIPBOARDUPDATE
00:01:19 - SDL Info (0): SDL EVENT: SDL_CLIPBOARDUPDATE
00:01:19 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=79973 windowid=2 event=SDL_WINDOWEVENT_ENTER data1=0 data2=0)

移出鼠标，SDL程序失去焦点：

00:01:26 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=86232 windowid=2 event=SDL_WINDOWEVENT_LEAVE data1=0 data2=0)
00:01:26 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=86241 windowid=2 event=SDL_WINDOWEVENT_FOCUS_LOST data1=0 data2=0)

错误时的SDL事件：

移入鼠标，SDL程序获得焦点，并认为Ctrl键按下：

00:00:33 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=33986 windowid=2 event=SDL_WINDOWEVENT_FOCUS_GAINED data1=0 data2=0)
00:00:33 - SDL Info (0): SDL EVENT: SDL_KEYDOWN (timestamp=33986 windowid=2 state=pressed repeat=false scancode=224 keycode=1073742048 mod=4160)
00:00:33 - SDL Info (0): SDL EVENT: SDL_KEYDOWN (timestamp=33986 windowid=2 state=pressed repeat=false scancode=228 keycode=1073742052 mod=4288)
00:00:33 - SDL Info (0): SDL EVENT: SDL_CLIPBOARDUPDATE
00:00:33 - SDL Info (0): SDL EVENT: SDL_CLIPBOARDUPDATE
00:00:33 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=33986 windowid=2 event=SDL_WINDOWEVENT_ENTER data1=0 data2=0)

移出鼠标，SDL程序失去焦点，并认为Ctrl键弹起：

00:00:39 - SDL Info (0): SDL EVENT: SDL_KEYUP (timestamp=39392 windowid=2 state=released repeat=false scancode=224 keycode=1073742048 mod=128)
00:00:39 - SDL Info (0): SDL EVENT: SDL_KEYUP (timestamp=39392 windowid=2 state=released repeat=false scancode=228 keycode=1073742052 mod=0)
00:00:39 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=39392 windowid=2 event=SDL_WINDOWEVENT_FOCUS_LOST data1=0 data2=0)
00:00:39 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=39392 windowid=2 event=SDL_WINDOWEVENT_LEAVE data1=0 data2=0)

Output of fcitx5-diagnose command

fcitx5-diagnose.log

[wengxt]

用 WAYLAND_DEBUG=1 启动你说的这些程序和 fcitx5 看看

顺便推荐你试试 kde 或者更新 sway 到 1.10 看看

[jwangac]

用 WAYLAND_DEBUG=1 启动你说的这些程序和 fcitx5 看看

顺便推荐你试试 kde 或者更新 sway 到 1.10 看看

感谢回复，更新sway到1.10仍然有此问题。

加上WAYLAND_DEBUG=1启动后，完整日志见wayland.txt

移入鼠标时的片段：

[2206097.844] wl_keyboard@30.enter(1377, wl_surface@45, array[12])
00:00:09 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=9532 windowid=2 event=SDL_WINDOWEVENT_FOCUS_GAINED data1=0 data2=0)
[2206097.911]  -> wl_display@1.sync(new id wl_callback@229)
00:00:09 - SDL Info (0): SDL EVENT: SDL_KEYDOWN (timestamp=9532 windowid=2 state=pressed repeat=false scancode=228 keycode=1073742052 mod=128)
00:00:09 - SDL Info (0): SDL EVENT: SDL_KEYDOWN (timestamp=9532 windowid=2 state=pressed repeat=true scancode=228 keycode=1073742052 mod=128)
00:00:09 - SDL Info (0): SDL EVENT: SDL_KEYDOWN (timestamp=9532 windowid=2 state=pressed repeat=true scancode=228 keycode=1073742052 mod=128)
[2206097.946] wl_keyboard@30.modifiers(1378, 0, 0, 0, 0)
[2206097.959] wl_data_device@21.data_offer(new id wl_data_offer@4278190080)
[2206097.961] wl_data_offer@4278190080.offer("text/plain;charset=utf-8")
[2206097.969] wl_data_offer@4278190080.offer("text/plain")
[2206097.970] wl_data_offer@4278190080.offer("TEXT")
[2206097.972] wl_data_offer@4278190080.offer("STRING")
[2206097.973] wl_data_offer@4278190080.offer("UTF8_STRING")
[2206097.980] wl_data_device@21.selection(wl_data_offer@4278190080)
[2206097.982]  -> wl_data_offer@4278190081.destroy()
00:00:09 - SDL Info (0): SDL EVENT: SDL_CLIPBOARDUPDATE
[2206097.994] zwp_primary_selection_device_v1@25.selection(nil)
00:00:09 - SDL Info (0): SDL EVENT: SDL_CLIPBOARDUPDATE
[2206098.000] zwp_text_input_v3@22.enter(wl_surface@45)
[2206098.002] wl_pointer@28.enter(1380, wl_surface@45, 620.65625000, 548.99218750)
00:00:09 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=9532 windowid=2 event=SDL_WINDOWEVENT_ENTER data1=0 data2=0)

移出鼠标时的片段：

[2206419.946] wl_keyboard@30.leave(1382, wl_surface@45)
00:00:09 - SDL Info (0): SDL EVENT: SDL_KEYUP (timestamp=9855 windowid=2 state=released repeat=false scancode=228 keycode=1073742052 mod=0)
[2206420.018]  -> wl_display@1.sync(new id wl_callback@260)
00:00:09 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=9855 windowid=2 event=SDL_WINDOWEVENT_FOCUS_LOST data1=0 data2=0)
[2206420.049] zwp_text_input_v3@22.leave(wl_surface@45)
[2206420.053] wl_pointer@28.leave(1387, wl_surface@45)
00:00:09 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=9855 windowid=2 event=SDL_WINDOWEVENT_LEAVE data1=0 data2=0)

关闭fcitx5，解决此问题后的日志如下。

移入鼠标时的片段：

[2626606.923] wl_keyboard@30.enter(3058, wl_surface@45, array[0])
00:00:16 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=16329 windowid=2 event=SDL_WINDOWEVENT_FOCUS_GAINED data1=0 data2=0)
[2626607.087]  -> wl_display@1.sync(new id wl_callback@246)
[2626607.104] wl_keyboard@30.modifiers(3059, 0, 0, 0, 0)
[2626607.110] wl_data_device@21.data_offer(new id wl_data_offer@4278190082)
[2626607.115] wl_data_offer@4278190082.offer("text/plain;charset=utf-8")
[2626607.117] wl_data_offer@4278190082.offer("UTF8_STRING")
[2626607.119] wl_data_offer@4278190082.offer("COMPOUND_TEXT")
[2626607.120] wl_data_offer@4278190082.offer("TEXT")
[2626607.124] wl_data_offer@4278190082.offer("text/plain")
[2626607.126] wl_data_offer@4278190082.offer("STRING")
[2626607.127] wl_data_offer@4278190082.offer("SAVE_TARGETS")
[2626607.129] wl_data_device@21.selection(wl_data_offer@4278190082)
[2626607.133]  -> wl_data_offer@4278190080.destroy()
00:00:16 - SDL Info (0): SDL EVENT: SDL_CLIPBOARDUPDATE
[2626607.147] zwp_primary_selection_device_v1@25.data_offer(new id zwp_primary_selection_offer_v1@4278190083)
[2626607.151] zwp_primary_selection_offer_v1@4278190083.offer("text/plain;charset=utf-8")
[2626607.153] zwp_primary_selection_offer_v1@4278190083.offer("UTF8_STRING")
[2626607.154] zwp_primary_selection_offer_v1@4278190083.offer("COMPOUND_TEXT")
[2626607.156] zwp_primary_selection_offer_v1@4278190083.offer("TEXT")
[2626607.159] zwp_primary_selection_offer_v1@4278190083.offer("text/plain")
[2626607.160] zwp_primary_selection_offer_v1@4278190083.offer("STRING")
[2626607.162] zwp_primary_selection_device_v1@25.selection(zwp_primary_selection_offer_v1@4278190083)
[2626607.164]  -> zwp_primary_selection_offer_v1@4278190081.destroy()
00:00:16 - SDL Info (0): SDL EVENT: SDL_CLIPBOARDUPDATE
[2626607.175] wl_pointer@28.enter(3060, wl_surface@45, 11.81640625, 475.00390625)
00:00:16 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=16329 windowid=2 event=SDL_WINDOWEVENT_ENTER data1=0 data2=0)

移出鼠标时的片段：

[2626994.621] wl_keyboard@30.leave(3065, wl_surface@45)
00:00:16 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=16717 windowid=2 event=SDL_WINDOWEVENT_FOCUS_LOST data1=0 data2=0)
[2626994.679]  -> wl_display@1.sync(new id wl_callback@289)
[2626994.690] zwp_text_input_v3@22.leave(wl_surface@45)
[2626994.696] wl_pointer@28.leave(3070, wl_surface@45)
00:00:16 - SDL Info (0): SDL EVENT: SDL_WINDOWEVENT (timestamp=16717 windowid=2 event=SDL_WINDOWEVENT_LEAVE data1=0 data2=0)

[wengxt]

这么看感觉是sdl的bug，keyboad leave 之后不应该假定任何按键的状态 sway也没有产生新的 wl keyboad key

wl_keyboard@30.modifiers(1378, 0, 0, 0, 0) 也清空了modifier key的状态

[wengxt]

Duplicate of #1202