125 lines
4.5 KiB
Lua
125 lines
4.5 KiB
Lua
-- Copyright (c) 2020-2021 hoob3rt
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-- MIT license, see LICENSE for more details.
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local M = {}
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local require = require('lualine_require').require
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local utils = require('lualine.utils.utils')
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local highlight = require('lualine.highlight')
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---runs draw function on components in section
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---handles separator edge cases :/
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---also handles default transitional separators at section boundaries
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---(why? I don't know)
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---@param section table list of components
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---@param section_name string used for getting proper hl
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---@param is_focused boolean
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---@return string formatted string for a section
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--TODO Clean this up this does lots of messy stuff.
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function M.draw_section(section, section_name, is_focused)
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local highlight_name = highlight.format_highlight(section_name, is_focused)
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local status = {}
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for _, component in pairs(section) do
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-- load components into status table
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if type(component) ~= 'table' or (type(component) == 'table' and not component.component_no) then
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return '' -- unknown element in section. section possibly not yet loaded
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end
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table.insert(status, component:draw(highlight_name, is_focused))
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end
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local section_color = utils.extract_highlight_colors(string.match(highlight_name, '%%#(.*)#'))
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-- Flags required for knowing when to remove component separator
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local strip_next_component = false
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local last_component_found = false
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local first_component_no = #section
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-- Check through components to see when component separator need to be removed
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for component_no = #section, 1, -1 do
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if #status[component_no] > 0 then
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first_component_no = component_no
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end
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-- Remove component separator with highlight for last component
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if not last_component_found and #status[component_no] > 0 then
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last_component_found = true
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status[component_no] = section[component_no]:strip_separator()
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if section_name < 'c' then
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if
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type(section[first_component_no].options.separator) ~= 'table'
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and (section[1].options.section_separators.left ~= nil and section[1].options.section_separators.left ~= '')
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then
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status[component_no] =
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string.format('%s%%S{%s}', status[component_no], section[1].options.section_separators.left)
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end
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end
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end
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-- Remove component separator when color option is used in next component
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if strip_next_component then
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strip_next_component = false
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status[component_no] = section[component_no]:strip_separator()
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end
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-- Remove component separator when color option is used to color background
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if
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(
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type(section[component_no].options.color) == 'table'
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and section[component_no].options.color.bg
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and section[component_no].options.color.bg ~= section_color.bg
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)
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or type(section[component_no].options.color) == 'string'
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or (
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type(section[component_no].options.color) == 'function'
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and section[component_no].color_fn_cache
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and section[component_no].color_fn_cache.bg
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and section[component_no].color_fn_cache.bg ~= section_color.bg
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)
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then
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strip_next_component = true
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status[component_no] = section[component_no]:strip_separator()
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end
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if section[component_no].strip_previous_separator == true then
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strip_next_component = true
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end
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end
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local left_separator_string = ''
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if
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section_name > 'x'
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and section[first_component_no]
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and type(section[first_component_no].options.separator) ~= 'table'
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and (section[1].options.section_separators.right ~= nil and section[1].options.section_separators.right ~= '')
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then
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left_separator_string = string.format(
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'%%s{%s}',
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section[first_component_no].options.ls_separator or section[1].options.section_separators.right
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)
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end
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-- Remove empty strings from status
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status = utils.list_shrink(status)
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local status_str = table.concat(status)
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if #status_str == 0 then
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return ''
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end
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local needs_hl
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local find_start_trans_sep_start, find_start_trans_sep_end = status_str:find('^%%s{.-}')
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if find_start_trans_sep_start then
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-- the section doesn't need to be prepended with default hl when sections
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-- first component has transitional sep
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needs_hl = status_str:find('^%%#', find_start_trans_sep_end + 1)
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else
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needs_hl = status_str:find('^%%#')
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end
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if needs_hl then
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-- Don't prepend with old highlight when the component changes it immediately
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return left_separator_string .. status_str
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else
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return left_separator_string .. highlight_name .. status_str
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end
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end
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return M
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