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131 lines
3.2 KiB
Lua
131 lines
3.2 KiB
Lua
--- TODO: This is implemented only for files now.
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-- https://tools.ietf.org/html/rfc3986
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-- https://tools.ietf.org/html/rfc2732
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-- https://tools.ietf.org/html/rfc2396
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local uri_decode
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do
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local schar = string.char
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--- Convert hex to char
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--@private
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local function hex_to_char(hex)
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return schar(tonumber(hex, 16))
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end
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uri_decode = function(str)
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return str:gsub("%%([a-fA-F0-9][a-fA-F0-9])", hex_to_char)
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end
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end
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local uri_encode
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do
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local PATTERNS = {
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--- RFC 2396
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-- https://tools.ietf.org/html/rfc2396#section-2.2
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rfc2396 = "^A-Za-z0-9%-_.!~*'()";
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--- RFC 2732
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-- https://tools.ietf.org/html/rfc2732
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rfc2732 = "^A-Za-z0-9%-_.!~*'()[]";
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--- RFC 3986
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-- https://tools.ietf.org/html/rfc3986#section-2.2
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rfc3986 = "^A-Za-z0-9%-._~!$&'()*+,;=:@/";
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}
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local sbyte, tohex = string.byte
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if jit then
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tohex = require'bit'.tohex
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else
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tohex = function(b) return string.format("%02x", b) end
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end
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--@private
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local function percent_encode_char(char)
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return "%"..tohex(sbyte(char), 2)
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end
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uri_encode = function(text, rfc)
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if not text then return end
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local pattern = PATTERNS[rfc] or PATTERNS.rfc3986
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return text:gsub("(["..pattern.."])", percent_encode_char)
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end
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end
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--@private
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local function is_windows_file_uri(uri)
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return uri:match('^file:///[a-zA-Z]:') ~= nil
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end
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--- Get a URI from a file path.
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--@param path (string): Path to file
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--@return URI
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local function uri_from_fname(path)
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local volume_path, fname = path:match("^([a-zA-Z]:)(.*)")
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local is_windows = volume_path ~= nil
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if is_windows then
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path = volume_path..uri_encode(fname:gsub("\\", "/"))
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else
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path = uri_encode(path)
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end
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local uri_parts = {"file://"}
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if is_windows then
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table.insert(uri_parts, "/")
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end
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table.insert(uri_parts, path)
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return table.concat(uri_parts)
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end
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local URI_SCHEME_PATTERN = '^([a-zA-Z]+[a-zA-Z0-9+-.]*)://.*'
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--- Get a URI from a bufnr
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--@param bufnr (number): Buffer number
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--@return URI
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local function uri_from_bufnr(bufnr)
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local fname = vim.api.nvim_buf_get_name(bufnr)
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local scheme = fname:match(URI_SCHEME_PATTERN)
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if scheme then
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return fname
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else
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return uri_from_fname(fname)
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end
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end
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--- Get a filename from a URI
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--@param uri (string): The URI
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--@return Filename
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local function uri_to_fname(uri)
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local scheme = assert(uri:match(URI_SCHEME_PATTERN), 'URI must contain a scheme: ' .. uri)
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if scheme ~= 'file' then
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return uri
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end
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uri = uri_decode(uri)
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-- TODO improve this.
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if is_windows_file_uri(uri) then
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uri = uri:gsub('^file:///', '')
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uri = uri:gsub('/', '\\')
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else
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uri = uri:gsub('^file://', '')
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end
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return uri
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end
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--- Return or create a buffer for a uri.
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--@param uri (string): The URI
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--@return bufnr.
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--@note Creates buffer but does not load it
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local function uri_to_bufnr(uri)
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local scheme = assert(uri:match(URI_SCHEME_PATTERN), 'URI must contain a scheme: ' .. uri)
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if scheme == 'file' then
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return vim.fn.bufadd(uri_to_fname(uri))
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else
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return vim.fn.bufadd(uri)
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end
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end
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return {
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uri_from_fname = uri_from_fname,
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uri_from_bufnr = uri_from_bufnr,
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uri_to_fname = uri_to_fname,
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uri_to_bufnr = uri_to_bufnr,
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}
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-- vim:sw=2 ts=2 et
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