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enhace: Allow transitional hl to be applied at beginung and end of stl 

Since for left sep at left most location we will not find and prev_hl
We will use the next hl after component similarly for right sep of right most position
we will not find a next_hl we will use previous hl before component
This commit is contained in:
shadmansaleh 2021-08-29 17:59:09 +06:00
parent 09169739fa
commit bae19db8d0
1 changed files with 18 additions and 13 deletions
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31
lua/lualine/init.lua
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@ -12,7 +12,7 @@ local config -- Stores cureently applied config
local new_config = true -- Stores config that will be applied
-- Helper for apply_transitional_separators()
local function find_next_hl(status, str_checked)
local function find_next_hl(status, str_checked, depth)
-- Gets the next valid hl group from str_checked
local hl_pos_start, hl_pos_end = status:find('%%#.-#', str_checked)
while true do
@ -23,18 +23,22 @@ local function find_next_hl(status, str_checked)
if next_start == nil then break end
hl_pos_start, hl_pos_end = next_start, next_end
end
return status:sub(hl_pos_start + 2, hl_pos_end - 1)
if depth == nil or depth == 1 then
return status:sub(hl_pos_start + 2, hl_pos_end - 1)
else
return find_next_hl(status, hl_pos_end, depth - 1)
end
end
-- Helper for apply_transitional_separators()
local function fill_section_separator(status, str_checked, last_hl, sep, reverse)
-- Inserts transitional separator along with transitional highlight
if last_hl and #last_hl == 0 then return end
local next_hl = find_next_hl(status, str_checked)
if next_hl == nil then return end
local prev_hl = #last_hl > 0 and last_hl[#last_hl] or find_next_hl(status, str_checked, 2)
local next_hl = find_next_hl(status, str_checked) or (#last_hl > 1 and last_hl[#last_hl - 1])
if next_hl == nil or #prev_hl == 0 or #next_hl == 0 then return end
local transitional_highlight = reverse -- lua ternary assignment x ? y : z
and modules.highlight.get_transitional_highlights(last_hl, next_hl)
or modules.highlight.get_transitional_highlights(next_hl, last_hl)
and modules.highlight.get_transitional_highlights(prev_hl, next_hl)
or modules.highlight.get_transitional_highlights(next_hl, prev_hl)
if transitional_highlight then
return transitional_highlight .. sep
end
@ -42,7 +46,7 @@ end
local function apply_transitional_separators(status)
local status_applied = {} -- Collects all the pieces for concatation
local last_hl -- Stores lash highligjt group that we found
local last_hl = {} -- Stores highlight groups that we found
local copied_pos = 1 -- Tracks how much we've copied over to status_applied
local str_checked = 1 -- Tracks where the searcher head is at
@ -58,8 +62,9 @@ local function apply_transitional_separators(status)
local next_char = modules.utils.charAt(status, str_checked +1)
if next_char == '#' then
-- %#hl_name# highlights
last_hl = status:match('^%%#(.-)#', str_checked)
str_checked = str_checked + #last_hl + 3
local hl = status:match('^%%#(.-)#', str_checked)
table.insert(last_hl, hl)
str_checked = str_checked + #hl + 3
elseif next_char == 's' then
-- %s{sep} is marker for left separator and
local sep = status:match('^%%s{(.-)}', str_checked)
@ -71,7 +76,7 @@ local function apply_transitional_separators(status)
-- %S{sep} is marker for right separator and
local sep = status:match('^%%S{(.-)}', str_checked)
str_checked = str_checked + #sep + 4 -- 4 = len(%{})
if status:find('^%%s', str_checked) then
if status:find('^%%s', str_checked) or status:find('^%%<%%s', str_checked) then
-- When transitional right_sep and left_sep are right next to each other
-- and in this exact order skip the left sep as we can't draw both.
str_checked = status:find('}', str_checked) + 1
@ -82,13 +87,13 @@ local function apply_transitional_separators(status)
elseif next_char == '%' then
str_checked = str_checked + 2 -- Skip the following % too
elseif next_char == '=' and last_hl and
(last_hl:find('^lualine_a') or last_hl:find('^lualine_b')) then
(last_hl[#last_hl]:find('^lualine_a') or last_hl[#last_hl]:find('^lualine_b')) then
-- TODO: Fix this properly
-- This check for lualine_a and lualine_b is dumb. It doesn't garantee
-- c or x section isn't present. Worst case sinario after this patch
-- we have another visual bug that occurs less frequently.
-- Annoying Edge Cases............................................
last_hl = nil
table.insert(last_hl, '')
str_checked = str_checked + 1 -- Skip the following % too
else
str_checked = str_checked + 1 -- Push it forward to avoid inf loop