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--- TODO: This is implemented only for files now.
-- https://tools.ietf.org/html/rfc3986
-- https://tools.ietf.org/html/rfc2732
-- https://tools.ietf.org/html/rfc2396
local uri_decode
do
local schar = string.char
--- Convert hex to char
---@private
local function hex_to_char(hex)
return schar(tonumber(hex, 16))
end
uri_decode = function(str)
return str:gsub('%%([a-fA-F0-9][a-fA-F0-9])', hex_to_char)
end
end
local uri_encode
do
local PATTERNS = {
--- RFC 2396
-- https://tools.ietf.org/html/rfc2396#section-2.2
rfc2396 = "^A-Za-z0-9%-_.!~*'()",
--- RFC 2732
-- https://tools.ietf.org/html/rfc2732
rfc2732 = "^A-Za-z0-9%-_.!~*'()[]",
--- RFC 3986
-- https://tools.ietf.org/html/rfc3986#section-2.2
rfc3986 = "^A-Za-z0-9%-._~!$&'()*+,;=:@/",
}
local sbyte, tohex = string.byte
if jit then
tohex = require('bit').tohex
else
tohex = function(b)
return string.format('%02x', b)
end
end
---@private
local function percent_encode_char(char)
return '%' .. tohex(sbyte(char), 2)
end
uri_encode = function(text, rfc)
if not text then
return
end
local pattern = PATTERNS[rfc] or PATTERNS.rfc3986
return text:gsub('([' .. pattern .. '])', percent_encode_char)
end
end
---@private
local function is_windows_file_uri(uri)
return uri:match('^file:/+[a-zA-Z]:') ~= nil
end
--- Get a URI from a file path.
---@param path string Path to file
---@return string URI
local function uri_from_fname(path)
local volume_path, fname = path:match('^([a-zA-Z]:)(.*)')
local is_windows = volume_path ~= nil
if is_windows then
path = volume_path .. uri_encode(fname:gsub('\\', '/'))
else
path = uri_encode(path)
end
local uri_parts = { 'file://' }
if is_windows then
table.insert(uri_parts, '/')
end
table.insert(uri_parts, path)
return table.concat(uri_parts)
end
local URI_SCHEME_PATTERN = '^([a-zA-Z]+[a-zA-Z0-9.+-]*):.*'
local WINDOWS_URI_SCHEME_PATTERN = '^([a-zA-Z]+[a-zA-Z0-9.+-]*):[a-zA-Z]:.*'
--- Get a URI from a bufnr
---@param bufnr integer
---@return string URI
local function uri_from_bufnr(bufnr)
local fname = vim.api.nvim_buf_get_name(bufnr)
local volume_path = fname:match('^([a-zA-Z]:).*')
local is_windows = volume_path ~= nil
local scheme
if is_windows then
fname = fname:gsub('\\', '/')
scheme = fname:match(WINDOWS_URI_SCHEME_PATTERN)
else
scheme = fname:match(URI_SCHEME_PATTERN)
end
if scheme then
return fname
else
return uri_from_fname(fname)
end
end
--- Get a filename from a URI
---@param uri string
---@return string filename or unchanged URI for non-file URIs
local function uri_to_fname(uri)
local scheme = assert(uri:match(URI_SCHEME_PATTERN), 'URI must contain a scheme: ' .. uri)
if scheme ~= 'file' then
return uri
end
uri = uri_decode(uri)
-- TODO improve this.
if is_windows_file_uri(uri) then
uri = uri:gsub('^file:/+', '')
uri = uri:gsub('/', '\\')
else
uri = uri:gsub('^file:/+', '/')
end
return uri
end
--- Get the buffer for a uri.
--- Creates a new unloaded buffer if no buffer for the uri already exists.
--
---@param uri string
---@return integer bufnr
local function uri_to_bufnr(uri)
return vim.fn.bufadd(uri_to_fname(uri))
end
return {
uri_from_fname = uri_from_fname,
uri_from_bufnr = uri_from_bufnr,
uri_to_fname = uri_to_fname,
uri_to_bufnr = uri_to_bufnr,
}
-- vim:sw=2 ts=2 et
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