hs.expose and Emacs

[agzam]

When Emacs GUI App is used with ns-use-native-fullscreen nil and has the frame in fullscreen mode - somehow hs.expose doesn't see it. I've tried all sorts of things - overriding hs.window.filter, changing hs.expose.ui parameters - nothing helps.

It's not necessarily bug in Hammerspoon, but I would like to find a way to make expose to "see" Emacs. I don't want to turn ns-use-native-fullscreen t - it's sucks

[lowne]

Most likely the default windowfilter cannot see it; you should gather the necessary info on the (fullscreened) window (notably its :role() and :subrole()) and use a custom windowfilter, or adjust the default windowfilter via hs.window.filter.default:setAppFilter(emacsAppName,{allowRoles=...,...}) (and possibly also :setOverrideFilter() if the window is non-standard)

[agzam]

@lowne that's the thing, in:

hs.inspect(hs.window.filter.new(true):getWindows())

Emacs appears

[cmsj]

@agzam still worth grabbing the :role() and :subrole() - Emacs often seems to cause issues with Hammerspoon because they like to declare themselves as a utility panel instead of a window, for some reason.

[agzam]

@cmsj I still feel there's something quite not right with hs.expose. So this for example should show only windows of iTerm and Chrome, right?: hs.expose.new(hs.window.filter.new{"iTerm2", "Google Chrome"}):show(), but no, it shows all available windows

[agzam]

yup, it does seem to be that:

• hs.expose ignores hs.window.filter (no matter what you set it to - it will use all available standard windows
• I can' find a way to set nonstandard window with subrole "AXUnknown" to be used in hs.window.filter

[dsedivec]

yup, it does seem to be that:

• hs.expose ignores hs.window.filter (no matter what you set it to - it will use all available standard windows

I think I can confirm this. Try one of the examples from expose's documentation in the console:

hs.expose.new{'Safari','Google Chrome'}:show()

All windows are always shown, the filter seems to be ignored. Maybe this bug should be retitled to "hs.expose ignores its window filter"? Or should a new issue be opened for that?

• I can' find a way to set nonstandard window with subrole "AXUnknown" to be used in hs.window.filter

Not sure if this would help but how about allowRoles = '*'? For example, here's a filter I use with hs.hints:

some_filter:setAppFilter('Emacs', {allowRoles = '*', allowTitles = 1})

(I'm using the Emacs Mac port and every visible Emacs window seems to have a companion window with no title. It seems OK to ignore this title-less window, hence allowTitles = 1.)

[agzam]

@dsedivec the last thing you showed worked for Emacs (when it's in fullscreen and when not), but then how do I define a filter that works for all the apps. For example 'iTerm2' in fullscreen has same problem

[dsedivec]

@dsedivec the last thing you showed worked for Emacs (when it's in fullscreen and when not), but then how do I define a filter that works for all the apps. For example 'iTerm2' in fullscreen has same problem

I have to confess that I stopped using Hammerspoon due to bugs, but IIRC you can just set another allowRoles = '*' filter for iTerm2, such as:

some_filter:setAppFilter('Emacs', {allowRoles = '*', allowTitles = 1})
some_filter:setAppFilter('iTerm2', {allowRoles = '*'})

You could call both of those on some_filter, and they are cumulative, so to speak.

To reiterate, though, I'm not using Hammerspoon right now, so I haven't tested this and I'm just going off memory.

[agzam]

@dsedivec right... I have figured it just before you have answered. Thanks a lot! btw. sad that you've stopped using Hammerspoon

[NightMachinery]

@agzam Can you show the final version? I just want a simple, non-filtered expose, but it doesn't show me all my apps. If I switch to an app after opening Hammerspoon, sometimes it gets shown (depends on the app). I also have emacs, but this problem happens with other apps, emacs is not special.

hs.expose.ui.fitWindowsInBackground = false

expose = hs.expose.new(
    nil, {
        fitWindowsInBackground = hs.expose.ui.fitWindowsInBackground, -- probably @redundant
        showThumbnails=true,
        onlyActiveApplication=false,
        includeOtherSpaces=true,
})

-- then bind to a hotkey
hyper_bind_v2{mods={"ctrl"}, key='[', pressedfn=function()expose:toggleShow()end}