83 lines
2.2 KiB
Lua
83 lines
2.2 KiB
Lua
local M = {}
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-- Parses markdown files and returns a table of SymbolInformation[] which is
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-- used by the plugin to show the outline.
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-- We do this because markdown does not have a LSP.
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-- Note that the headings won't have any hierarchy (as of now).
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---@return table
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function M.handle_markdown()
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local lines = vim.api.nvim_buf_get_lines(0, 0, -1, false)
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local level_symbols = { { children = {} } }
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local max_level = 1
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local is_inside_code_block = false
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for line, value in ipairs(lines) do
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if string.find(value, '^```') then
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is_inside_code_block = not is_inside_code_block
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end
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local next_value = lines[line+1]
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local is_emtpy_line = #value:gsub("^%s*(.-)%s*$", "%1") == 0
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local header, title = string.match(value, '^(#+)%s+(.*)$')
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if not header and next_value and not is_emtpy_line then
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if string.match(next_value, '^===+%s*$') then
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header = '#'
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title = value
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elseif string.match(next_value, '^---+%s*$') then
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header = '##'
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title = value
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end
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end
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if header and not is_inside_code_block then
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local depth = #header + 1
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local parent
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for i = depth - 1, 1, -1 do
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if level_symbols[i] ~= nil then
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parent = level_symbols[i].children
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break
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end
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end
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for i = depth, max_level do
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if level_symbols[i] ~= nil then
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level_symbols[i].selectionRange['end'].line = line - 1
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level_symbols[i].range['end'].line = line - 1
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level_symbols[i] = nil
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end
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end
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max_level = depth
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local entry = {
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kind = 13,
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name = title,
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selectionRange = {
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start = { character = 1, line = line - 1 },
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['end'] = { character = 1, line = line - 1 },
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},
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range = {
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start = { character = 1, line = line - 1 },
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['end'] = { character = 1, line = line - 1 },
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},
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children = {},
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}
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parent[#parent + 1] = entry
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level_symbols[depth] = entry
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end
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end
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for i = 2, max_level do
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if level_symbols[i] ~= nil then
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level_symbols[i].selectionRange['end'].line = #lines
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level_symbols[i].range['end'].line = #lines
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end
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end
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return level_symbols[1].children
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end
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return M
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