326 lines
12 KiB
Lua
326 lines
12 KiB
Lua
-- Copyright (c) 2020-2021 hoob3rt
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-- MIT license, see LICENSE for more details.
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local utils_section = require('lualine.utils.section')
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local highlight = require('lualine.highlight')
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local config = require('lualine.defaults')
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local function apply_configuration(config_table)
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if not config_table then return end
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local function parse_sections(section_group_name)
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if not config_table[section_group_name] then return end
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for section_name, section in pairs(config_table[section_group_name]) do
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config[section_group_name][section_name] =
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config_table[section_group_name][section_name]
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if type(section) == 'table' then
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for _, component in pairs(section) do
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if type(component) == 'table' and type(component[2]) == 'table' then
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local options = component[2]
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component[2] = nil
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for key, val in pairs(options) do component[key] = val end
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end
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end
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end
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end
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end
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parse_sections('options')
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parse_sections('sections')
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parse_sections('inactive_sections')
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parse_sections('tabline')
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if config_table.extensions then config.extensions = config_table.extensions end
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end
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local function check_single_separator()
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local compoennt_separator = config.options.component_separators
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local section_separator = config.options.section_separators
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if config.options.component_separators ~= nil then
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if type(config.options.component_separators) == 'string' then
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config.options.component_separators =
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{compoennt_separator, compoennt_separator}
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elseif #config.options.component_separators == 1 then
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config.options.component_separators =
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{
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config.options.component_separators[1],
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config.options.component_separators[1]
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}
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end
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end
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if config.options.section_separators ~= nil then
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if type(config.options.section_separators) == 'string' then
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config.options.section_separators = {section_separator, section_separator}
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elseif #config.options.section_separators == 1 then
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config.options.section_separators =
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{
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config.options.section_separators[1],
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config.options.section_separators[1]
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}
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end
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end
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end
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local function load_special_components(component)
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return function()
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-- precedence lualine_component > vim_var > lua_var > vim_function
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if component:find('[gvtwb]?o?:') == 1 then
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-- vim veriable component
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-- accepts g:, v:, t:, w:, b:, o, go:, vo:, to:, wo:, bo:
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-- filters g portion from g:var
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local scope = component:match('[gvtwb]?o?')
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-- filters var portion from g:var
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local var_name = component:sub(#scope + 2, #component)
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-- Displays nothing when veriable aren't present
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local return_val = vim[scope][var_name]
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if return_val == nil then return '' end
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local ok
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ok, return_val = pcall(tostring, return_val)
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if ok then return return_val end
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return ''
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elseif loadstring(string.format('return %s ~= nil', component)) and
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loadstring(string.format([[return %s ~= nil]], component))() then
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-- lua veriable component
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return loadstring(string.format([[
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local ok, return_val = pcall(tostring, %s)
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if ok then return return_val end
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return '']], component))()
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else
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-- vim function component
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local ok, return_val = pcall(vim.fn[component])
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if not ok then return '' end -- function call failed
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ok, return_val = pcall(tostring, return_val)
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if ok then
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return return_val
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else
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return ''
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end
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end
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end
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end
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local function component_loader(component)
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if type(component[1]) == 'function' then return component end
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if type(component[1]) == 'string' then
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-- Keep component name for later use as component[1] will be overwritten
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-- With component function
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component.component_name = component[1]
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-- apply default args
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for opt_name, opt_val in pairs(config.options) do
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if component[opt_name] == nil then component[opt_name] = opt_val end
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end
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-- load the component
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local ok, loaded_component = pcall(require, 'lualine.components.' ..
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component.component_name)
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if not ok then
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loaded_component = load_special_components(component.component_name)
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end
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component[1] = loaded_component
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if type(component[1]) == 'table' then
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component[1] = component[1].init(component)
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end
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-- set custom highlights
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if component.color then
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component.color_highlight = highlight.create_component_highlight_group(
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component.color, component.component_name,
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component)
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end
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end
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end
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local function load_sections(sections)
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for section_name, section in pairs(sections) do
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for index, component in pairs(section) do
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if type(component) == 'string' or type(component) == 'function' then
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component = {component}
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end
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component.self = {}
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component.self.section = section_name
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component_loader(component)
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section[index] = component
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end
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end
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end
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local function load_components()
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load_sections(config.sections)
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load_sections(config.inactive_sections)
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load_sections(config.tabline)
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end
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local function load_extensions()
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for index, extension in pairs(config.extensions) do
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local local_extension = require('lualine.extensions.' .. extension)
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load_sections(local_extension.sections)
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load_sections(local_extension.inactive_sections)
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config.extensions[index] = local_extension
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end
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end
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local function statusline(sections, is_focused)
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local function create_status_builder()
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-- The sequence sections should maintain
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local section_sequence = {'a', 'b', 'c', 'x', 'y', 'z'}
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local status_builder = {}
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for _, section_name in ipairs(section_sequence) do
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if sections['lualine_' .. section_name] then
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-- insert highlight+components of this section to status_builder
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local section_highlight = highlight.format_highlight(is_focused,
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'lualine_' ..
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section_name)
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local section_data = utils_section.draw_section(
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sections['lualine_' .. section_name],
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section_highlight)
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if #section_data > 0 then
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table.insert(status_builder,
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{name = section_name, data = section_data})
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end
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end
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end
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return status_builder
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end
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-- status_builder stores statusline without section_separators
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local status_builder = create_status_builder()
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-- Actual statusline
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local status = {}
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local half_passed = false
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for i = 1, #status_builder do
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-- midsection divider
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if not half_passed and status_builder[i].name > 'c' then
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table.insert(status,
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highlight.format_highlight(is_focused, 'lualine_c') .. '%=')
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half_passed = true
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end
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-- provide section_separators when statusline is in focus
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if is_focused then
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-- component separator needs to have fg = current_section.bg
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-- and bg = adjacent_section.bg
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local previous_section = status_builder[i - 1] or {}
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local current_section = status_builder[i]
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local next_section = status_builder[i + 1] or {}
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-- For 2nd half we need to show separator before section
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if current_section.name > 'x' then
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local transitional_highlight = highlight.get_transitional_highlights(
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previous_section.data,
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current_section.data, true)
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if transitional_highlight and config.options.section_separators and
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config.options.section_separators[2] then
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table.insert(status, transitional_highlight ..
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config.options.section_separators[2])
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end
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end
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-- **( insert the actual section in the middle )** --
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table.insert(status, status_builder[i].data)
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-- For 1st half we need to show separator after section
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if current_section.name < 'c' then
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local transitional_highlight = highlight.get_transitional_highlights(
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current_section.data,
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next_section.data)
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if transitional_highlight and config.options.section_separators and
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config.options.section_separators[1] then
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table.insert(status, transitional_highlight ..
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config.options.section_separators[1])
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end
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end
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else -- when not in focus
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table.insert(status, status_builder[i].data)
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end
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end
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-- incase none of x,y,z was configured lets not fill whole statusline with a,b,c section
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if not half_passed then
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table.insert(status,
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highlight.format_highlight(is_focused, 'lualine_c') .. '%=')
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end
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return table.concat(status)
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end
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-- check if any extension matches the filetype and return proper sections
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local function get_extension_sections()
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local sections, inactive_sections = nil, nil
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for _, extension in ipairs(config.extensions) do
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for _, filetype in ipairs(extension.filetypes) do
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if vim.bo.filetype == filetype then
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sections = extension.sections
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inactive_sections = extension.inactive_sections
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break
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end
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end
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end
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return {sections = sections, inactive_sections = inactive_sections}
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end
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local function status_dispatch()
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local extension_sections = get_extension_sections()
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if vim.g.statusline_winid == vim.fn.win_getid() then
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local sections = extension_sections.sections
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if sections == nil then sections = config.sections end
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return statusline(sections, true)
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else
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local inactive_sections = extension_sections.inactive_sections
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if inactive_sections == nil then
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inactive_sections = config.inactive_sections
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end
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return statusline(inactive_sections, false)
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end
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end
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local function tabline() return statusline(config.tabline, true) end
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local function setup_theme()
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local theme_name = config.options.theme
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local ok, theme
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if type(theme_name) == 'string' then
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ok, theme = pcall(require, 'lualine.themes.' .. theme_name)
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if not ok then
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vim.api.nvim_echo({
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{
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'theme ' .. theme_name .. ' not found defaulting to gruvbox',
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'ErrorMsg'
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}
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}, true, {})
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theme = require 'lualine.themes.gruvbox'
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end
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else
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-- use the provided theme as-is, assuming it's a dictionary
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theme = config.options.theme
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end
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highlight.create_highlight_groups(theme)
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vim.api.nvim_exec([[
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augroup lualine
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autocmd!
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autocmd ColorScheme * lua require'lualine.utils.utils'.reload_highlights()
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augroup END
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]], false)
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end
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local function set_tabline()
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if next(config.tabline) ~= nil then
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_G.lualine_tabline = tabline
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vim.o.tabline = '%!v:lua.lualine_tabline()'
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vim.o.showtabline = 2
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end
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end
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local function set_statusline()
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if next(config.sections) ~= nil or next(config.inactive_sections) ~= nil then
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_G.lualine_statusline = status_dispatch
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vim.o.statusline = '%!v:lua.lualine_statusline()'
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vim.api.nvim_exec([[
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autocmd lualine WinLeave,BufLeave * lua vim.wo.statusline=lualine_statusline()
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autocmd lualine WinEnter,BufEnter * setlocal statusline=%!v:lua.lualine_statusline()
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]], false)
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end
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end
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local function setup(user_config)
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apply_configuration(vim.g.lualine)
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apply_configuration(user_config)
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check_single_separator()
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setup_theme()
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load_components()
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load_extensions()
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set_statusline()
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set_tabline()
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end
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return {setup = setup}
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