gffranco
cb11889e72
Delete all Rust crates (crates/) and Cargo files. The nuwiki-ls binary is now built in the separate nuwiki-rs repository and downloaded at install time from the Gitea release assets, with a cargo build fallback that clones nuwiki-rs. Update all documentation to reflect the split repo layout.
59 lines
1.8 KiB
Lua
59 lines
1.8 KiB
Lua
-- lua/nuwiki/folding.lua — `foldexpr` fallback when the LSP isn't
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-- attached. Same heading-block model as the server-side `foldingRange`
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-- provider in the nuwiki-rs LSP server, but driven from a
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-- pure regex over `getline()` so it works without a running server.
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--
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-- Activated by `setlocal foldmethod=expr foldexpr=v:lua.require'nuwiki.folding'.expr()`
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-- in `ftplugin/nuwiki.vim` when `folding` is enabled in the user config.
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local M = {}
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--- Heading level from one line of source. Returns 0 for non-headings.
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local function heading_level(line)
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local lead = line:match('^%s*(=+)%s')
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if not lead then return 0 end
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local lvl = #lead
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if lvl > 6 then return 0 end
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-- Require a matching trailing run of `=`s.
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local trail = line:match('%s(=+)%s*$')
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if not trail or #trail ~= lvl then return 0 end
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return lvl
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end
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--- `foldexpr` body. Returns a fold-marker string per `:help fold-expr`.
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function M.expr()
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local lnum = vim.v.lnum
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local line = vim.fn.getline(lnum)
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local lvl = heading_level(line)
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if lvl > 0 then
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return '>' .. lvl
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end
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return '='
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end
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--- Build a heading-only `foldtext` showing the heading title trimmed.
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function M.foldtext()
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local fs = vim.v.foldstart
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local line = vim.fn.getline(fs):gsub('=', ''):gsub('^%s+', ''):gsub('%s+$', '')
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local count = vim.v.foldend - vim.v.foldstart + 1
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return string.format('▸ %s … (%d lines)', line, count)
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end
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--- LSP-backed foldexpr with a safe fallback.
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---
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--- Wraps `vim.lsp.foldexpr` so a missing client / un-attached buffer /
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--- transient evaluation error falls back to the regex implementation
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--- instead of throwing E5108 for every line in the buffer.
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function M.lsp_expr()
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if not (vim.lsp and vim.lsp.foldexpr) then
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return M.expr()
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end
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local ok, val = pcall(vim.lsp.foldexpr)
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if ok then
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return val
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end
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return M.expr()
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end
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return M
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