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src/cursor.c: explain X11 cursor name fallback

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Consolatis 2023-02-12 00:45:12 +01:00 • committed by Johan Malm
parent f9882d8dd3
commit 231d88706a
1 changed files with 23 additions and 0 deletions
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23
src/cursor.c
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@ -1089,6 +1089,29 @@ cursor_init(struct seat *seat)
seat->xcursor_manager = wlr_xcursor_manager_create(xcursor_theme, size);
wlr_xcursor_manager_load(seat->xcursor_manager, 1);
/*
* Wlroots provides integrated fallback cursor icons using
* old-style X11 cursor names (cursors_x11) and additionally
* (since wlroots 0.16.2) aliases them to cursor-spec names
* (cursors_xdg).
*
* However, the aliasing does not include the "grab" cursor
* icon which labwc uses when dragging a window. To fix that,
* try to get the grab cursor icon from wlroots. If the user
* supplied an appropriate cursor theme which includes the
* "grab" cursor icon, we will keep using it.
*
* If no "grab" icon can be found we will fall back to the
* old style cursor names and use "grabbing" instead which
* is part of the X11 fallbacks and thus always available.
*
* Shipping the complete alias table for X11 cursor names
* (and not just the "grab" cursor alias) makes sure that
* this also works for wlroots versions before 0.16.2.
*
* See the cursor name alias table on the top of this file
* for the actual cursor names used.
*/
if (wlr_xcursor_manager_get_xcursor(seat->xcursor_manager,
cursors_xdg[LAB_CURSOR_GRAB], 1)) {
cursor_names = cursors_xdg;