81 lines
2.1 KiB
Lua
81 lines
2.1 KiB
Lua
local fn = vim.fn
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local api = vim.api
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local status_line_max_length = 5
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-- TODO: only update this portion when needed instead of every render?
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local status_line_buffer_by_num = function(bufnum)
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local is_active = false
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local bufinfo = fn.getbufinfo(bufnum)[1]
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local prefix = ' %#InactiveBuffer#'
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local suffix = '%* '
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if bufinfo.changed == 1 then
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prefix = '%#DirtyBuffer# '
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suffix = ' %*'
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end
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local windex = fn.index(bufinfo.windows, vim.g.statusline_winid)
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if bufinfo.hidden and windex >= 0 then
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is_active = true
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prefix = '%#ActiveBuffer# '
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suffix = ' %*'
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if bufinfo.changed == 1 then
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prefix = '%#ActiveDirtyBuffer# *'
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suffix = ' %*'
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end
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end
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return (prefix .. fn.fnamemodify(fn.bufname(bufnum), ':t') .. suffix), is_active
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end
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local status_line_buffers = function()
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-- TODO: mark buffers with unsaved changes
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local active_index = -1
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local acc = {}
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for _,bufnum in ipairs(api.nvim_list_bufs()) do
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local bufinfo = fn.getbufinfo(bufnum)[1]
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if bufinfo.listed ~= 0 then
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local entry, is_active = status_line_buffer_by_num(bufnum)
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table.insert(acc, entry)
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if is_active then
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active_index = #acc
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end
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end
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end
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if active_index >= 0 then
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-- TODO: instead implement this as a wraparound carousel?
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local offset = status_line_max_length / 2
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local min_buf_num = math.max(0, (active_index - offset))
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local max_buf_num = math.min(#acc - 1, min_buf_num + status_line_max_length - 1)
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min_buf_num = math.max(0, max_buf_num - status_line_max_length + 1)
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local buflist = table.concat({unpack(acc, min_buf_num+1, max_buf_num+1)}, '')
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local prefix = ''
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local suffix = ''
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if min_buf_num > 0 then
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prefix = '< '
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end
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if max_buf_num < (#acc - 1) then
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suffix = ' >'
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end
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return prefix .. buflist .. suffix
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else
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local suffix = ''
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if #acc - 1 >status_line_max_length then
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suffix = ' >'
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end
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local buflist = table.concat({unpack(acc, 1, math.min(#acc, status_line_max_length))}, '')
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return buflist .. suffix .. active_index
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end
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end
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function StatusLine()
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return status_line_buffers() .. '%*%=%c,%l/%L (%p%%)'
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end
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return {
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setup=function()
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vim.o.statusline = '%!v:lua.StatusLine()'
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end
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}
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