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Fix scroll preservation for customized container scrollbars.

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This commit is contained in:
Signal 2026-03-28 17:43:34 -04:00
parent 969030a026
commit aff81c8c92
1 changed files with 7 additions and 2 deletions
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9
init.lua
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@ -752,6 +752,7 @@ local fs_scrollbar = {
return e return e
end, end,
onchange = function(e, fn) onchange = function(e, fn)
e._has_onchange = true
ctx._events.on_scrollbar_event[e.__id] = fn ctx._events.on_scrollbar_event[e.__id] = fn
return e return e
end, end,
@ -805,9 +806,11 @@ local fs_scroll_container = {
end end
out[#out +1] = "scroll_container_end[]" out[#out +1] = "scroll_container_end[]"
local v = e.__fs._ctx.fields[e.__id]
if not e._scrollbar then if not e._scrollbar then
local v = e.__fs._ctx.fields[e.__id]
out[#out +1] = string.format("scrollbar[-800,-800;0,0;%s;%s;%s]", get(e, "orientation"), e.__id, v and v:sub(5) or "") out[#out +1] = string.format("scrollbar[-800,-800;0,0;%s;%s;%s]", get(e, "orientation"), e.__id, v and v:sub(5) or "")
elseif not e._scrollbar._has_onchange and v then
e._scrollbar.value = v:sub(5)
end end
return table.concat(out) return table.concat(out)
@ -843,7 +846,8 @@ local fs_scroll_container = {
e._scrollbar:onchange(fn) e._scrollbar:onchange(fn)
return e return e
end end
e._scrollbar = fs_scrollbar(-800, -800, 0, 0, e._orientation, e.__id):onchange(fn) e._scrollbar = fs_scrollbar(-800, -800, 0, 0, e._orientation):onchange(fn)
e._scrollbar.__id = e.__id
return e return e
end, end,
-- A non-transient name is required in order to preserve scroll position upon a rebuild. -- A non-transient name is required in order to preserve scroll position upon a rebuild.
@ -1479,6 +1483,7 @@ imfs = {
local container = {__parent = ctx, _events = setmetatable({}, {__index = ctx._events, __newindex = ctx._events}), __fs = ctx.__fs or ctx} local container = {__parent = ctx, _events = setmetatable({}, {__index = ctx._events, __newindex = ctx._events}), __fs = ctx.__fs or ctx}
table.insert(ctx, container) table.insert(ctx, container)
ctx = container ctx = container
return container
end, end,
container_end = function() container_end = function()
ctx = ctx.__parent ctx = ctx.__parent