199 lines
6.5 KiB
Lua
199 lines
6.5 KiB
Lua
-- Copyright (c) 2020-2021 shadmansaleh
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-- MIT license, see LICENSE for more details.
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local async = require 'lualine.utils.async'
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local utils = require 'lualine.utils.utils'
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local highlight = require 'lualine.highlight'
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local Diff = require('lualine.component'):new()
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-- Vars
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-- variable to store git diff stats
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Diff.git_diff = nil
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-- accumulates async output to process in the end
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Diff.diff_data = ''
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-- variable to store git_diff getter async function
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Diff.get_git_diff = nil
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-- default colors
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Diff.default_colors = {
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added = '#f0e130',
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removed = '#90ee90',
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modified = '#ff0038'
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}
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-- Initializer
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Diff.new = function(self, options, child)
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local new_instance = self._parent:new(options, child or Diff)
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local default_symbols = {added = '+', modified = '~', removed = '-'}
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new_instance.options.symbols = vim.tbl_extend('force', default_symbols,
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new_instance.options.symbols or
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{})
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if new_instance.options.colored == nil then
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new_instance.options.colored = true
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end
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-- apply colors
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if not new_instance.options.color_added then
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new_instance.options.color_added = utils.extract_highlight_colors('DiffAdd',
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'fg') or
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Diff.default_colors.added
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end
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if not new_instance.options.color_modified then
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new_instance.options.color_modified =
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utils.extract_highlight_colors('DiffChange', 'fg') or
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Diff.default_colors.modified
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end
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if not new_instance.options.color_removed then
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new_instance.options.color_removed =
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utils.extract_highlight_colors('DiffDelete', 'fg') or
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Diff.default_colors.removed
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end
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-- create highlights and save highlight_name in highlights table
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if new_instance.options.colored then
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new_instance.highlights = {
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added = highlight.create_component_highlight_group(
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{fg = new_instance.options.color_added}, 'diff_added',
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new_instance.options),
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modified = highlight.create_component_highlight_group(
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{fg = new_instance.options.color_modified}, 'diff_modified',
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new_instance.options),
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removed = highlight.create_component_highlight_group(
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{fg = new_instance.options.color_removed}, 'diff_removed',
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new_instance.options)
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}
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end
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-- call update functions so git diff is present when component is loaded
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Diff.update_git_diff_getter()
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Diff.update_git_diff()
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vim.api.nvim_exec([[
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autocmd lualine BufEnter * lua require'lualine.components.diff'.update_git_diff_getter()
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autocmd lualine BufEnter * lua require'lualine.components.diff'.update_git_diff()
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autocmd lualine BufWritePost * lua require'lualine.components.diff'.update_git_diff()
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]], false)
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return new_instance
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end
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-- Function that runs everytime statusline is updated
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Diff.update_status = function(self)
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if Diff.git_diff == nil then return '' end
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local colors = {}
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if self.options.colored then
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-- load the highlights and store them in colors table
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for name, highlight_name in pairs(self.highlights) do
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colors[name] = highlight.component_format_highlight(highlight_name)
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end
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end
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local result = {}
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-- loop though data and load available sections in result table
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for _, name in ipairs {'added', 'modified', 'removed'} do
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if Diff.git_diff[name] and Diff.git_diff[name] > 0 then
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if self.options.colored then
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table.insert(result, colors[name] .. self.options.symbols[name] ..
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Diff.git_diff[name])
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else
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table.insert(result, self.options.symbols[name] .. Diff.git_diff[name])
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end
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end
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end
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if #result > 0 then
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return table.concat(result, ' ')
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else
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return ''
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end
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end
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-- Api to get git sign count
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-- scheme :
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-- {
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-- added = added_count,
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-- modified = modified_count,
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-- removed = removed_count,
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-- }
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-- error_code = { added = -1, modified = -1, removed = -1 }
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function Diff.get_sign_count()
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Diff.update_git_diff_getter()
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Diff.update_git_diff()
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return Diff.git_diff or {added = -1, modified = -1, removed = -1}
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end
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-- process diff data and update git_diff{ added, removed, modified }
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function Diff.process_diff(data)
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-- Adapted from https://github.com/wbthomason/nvim-vcs.lua
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local added, removed, modified = 0, 0, 0
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for line in vim.gsplit(data, '\n') do
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if string.find(line, [[^@@ ]]) then
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local tokens = vim.fn.matchlist(line,
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[[^@@ -\v(\d+),?(\d*) \+(\d+),?(\d*)]])
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local line_stats = {
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mod_count = tokens[3] == '' and 1 or tonumber(tokens[3]),
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new_count = tokens[5] == '' and 1 or tonumber(tokens[5])
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}
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if line_stats.mod_count == 0 and line_stats.new_count > 0 then
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added = added + line_stats.new_count
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elseif line_stats.mod_count > 0 and line_stats.new_count == 0 then
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removed = removed + line_stats.mod_count
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else
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local min = math.min(line_stats.mod_count, line_stats.new_count)
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modified = modified + min
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added = added + line_stats.new_count - min
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removed = removed + line_stats.mod_count - min
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end
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end
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end
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Diff.git_diff = {added = added, modified = modified, removed = removed}
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end
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-- Updates the async function for current file
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function Diff.update_git_diff_getter()
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-- stop older function properly before overwritting it
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if Diff.get_git_diff then
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Diff.get_git_diff:stop()
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Diff.diff_data = ''
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end
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-- Donn't show git diff when current buffer doesn't have a filename
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if #vim.fn.expand('%') == 0 then
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Diff.get_git_diff = nil;
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Diff.git_diff = nil;
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return
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end
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Diff.get_git_diff = async:new({
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cmd = string.format(
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[[git -C %s --no-pager diff --no-color --no-ext-diff -U0 -- %s]],
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vim.fn.expand('%:h'), vim.fn.expand('%:t')),
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on_stdout = function(_, data)
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if data then Diff.diff_data = Diff.diff_data .. data end
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end,
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on_stderr = function(_, data)
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if data then
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Diff.git_diff = nil
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Diff.diff_data = ''
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end
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end,
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on_exit = function()
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if Diff.diff_data ~= '' then
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Diff.process_diff(Diff.diff_data)
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Diff.diff_data = ''
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else
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Diff.git_diff = {added = 0, modified = 0, removed = 0}
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end
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end
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})
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end
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-- Update git_diff veriable
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function Diff.update_git_diff()
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vim.schedule_wrap(function()
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if Diff.get_git_diff then
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Diff.diff_data = ''
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Diff.get_git_diff:start()
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end
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end)()
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end
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return Diff
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