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				https://github.com/neovim/neovim.git
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			413 lines
		
	
	
		
			12 KiB
		
	
	
	
		
			Lua
		
	
	
	
	
	
			
		
		
	
	
			413 lines
		
	
	
		
			12 KiB
		
	
	
	
		
			Lua
		
	
	
	
	
	
local protocol = require('vim.lsp.protocol')
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local ms = protocol.Methods
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local api = vim.api
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local M = {}
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local augroup = api.nvim_create_augroup('vim_lsp_diagnostic', {})
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local DEFAULT_CLIENT_ID = -1
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---@param severity lsp.DiagnosticSeverity
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local function severity_lsp_to_vim(severity)
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  if type(severity) == 'string' then
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    severity = protocol.DiagnosticSeverity[severity] --- @type integer
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  end
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  return severity
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end
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---@return lsp.DiagnosticSeverity
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local function severity_vim_to_lsp(severity)
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  if type(severity) == 'string' then
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    severity = vim.diagnostic.severity[severity]
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  end
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  return severity
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end
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---@param bufnr integer
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---@return string[]?
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local function get_buf_lines(bufnr)
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  if vim.api.nvim_buf_is_loaded(bufnr) then
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    return vim.api.nvim_buf_get_lines(bufnr, 0, -1, false)
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  end
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  local filename = vim.api.nvim_buf_get_name(bufnr)
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  local f = io.open(filename)
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  if not f then
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    return
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  end
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  local content = f:read('*a')
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  if not content then
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    -- Some LSP servers report diagnostics at a directory level, in which case
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    -- io.read() returns nil
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    f:close()
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    return
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  end
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  local lines = vim.split(content, '\n')
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  f:close()
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  return lines
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end
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--- @param diagnostic lsp.Diagnostic
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--- @param client_id integer
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--- @return table?
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local function tags_lsp_to_vim(diagnostic, client_id)
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  local tags ---@type table?
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  for _, tag in ipairs(diagnostic.tags or {}) do
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    if tag == protocol.DiagnosticTag.Unnecessary then
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      tags = tags or {}
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      tags.unnecessary = true
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    elseif tag == protocol.DiagnosticTag.Deprecated then
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      tags = tags or {}
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      tags.deprecated = true
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    else
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      vim.lsp.log.info(string.format('Unknown DiagnosticTag %d from LSP client %d', tag, client_id))
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    end
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  end
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  return tags
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end
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---@param diagnostics lsp.Diagnostic[]
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---@param bufnr integer
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---@param client_id integer
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---@return vim.Diagnostic[]
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local function diagnostic_lsp_to_vim(diagnostics, bufnr, client_id)
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  local buf_lines = get_buf_lines(bufnr)
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  local client = vim.lsp.get_client_by_id(client_id)
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  local position_encoding = client and client.offset_encoding or 'utf-16'
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  --- @param diagnostic lsp.Diagnostic
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  --- @return vim.Diagnostic
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  return vim.tbl_map(function(diagnostic)
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    local start = diagnostic.range.start
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    local _end = diagnostic.range['end']
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    local message = diagnostic.message
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    if type(message) ~= 'string' then
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      vim.notify_once(
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        string.format('Unsupported Markup message from LSP client %d', client_id),
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        vim.lsp.log_levels.ERROR
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      )
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      message = diagnostic.message.value
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    end
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    local line = buf_lines and buf_lines[start.line + 1] or ''
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    --- @type vim.Diagnostic
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    return {
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      lnum = start.line,
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      col = vim.str_byteindex(line, position_encoding, start.character, false),
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      end_lnum = _end.line,
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      end_col = vim.str_byteindex(line, position_encoding, _end.character, false),
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      severity = severity_lsp_to_vim(diagnostic.severity),
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      message = message,
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      source = diagnostic.source,
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      code = diagnostic.code,
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      _tags = tags_lsp_to_vim(diagnostic, client_id),
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      user_data = {
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        lsp = diagnostic,
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      },
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    }
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  end, diagnostics)
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end
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--- @param diagnostic vim.Diagnostic
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--- @return lsp.DiagnosticTag[]?
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local function tags_vim_to_lsp(diagnostic)
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  if not diagnostic._tags then
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    return
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  end
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  local tags = {} --- @type lsp.DiagnosticTag[]
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  if diagnostic._tags.unnecessary then
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    tags[#tags + 1] = protocol.DiagnosticTag.Unnecessary
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  end
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  if diagnostic._tags.deprecated then
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    tags[#tags + 1] = protocol.DiagnosticTag.Deprecated
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  end
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  return tags
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end
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--- Converts the input `vim.Diagnostic`s to LSP diagnostics.
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--- @param diagnostics vim.Diagnostic[]
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--- @return lsp.Diagnostic[]
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function M.from(diagnostics)
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  ---@param diagnostic vim.Diagnostic
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  ---@return lsp.Diagnostic
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  return vim.tbl_map(function(diagnostic)
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    local user_data = diagnostic.user_data or {}
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    if user_data.lsp then
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      return user_data.lsp
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    end
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    return {
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      range = {
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        start = {
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          line = diagnostic.lnum,
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          character = diagnostic.col,
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        },
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        ['end'] = {
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          line = diagnostic.end_lnum,
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          character = diagnostic.end_col,
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        },
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      },
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      severity = severity_vim_to_lsp(diagnostic.severity),
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      message = diagnostic.message,
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      source = diagnostic.source,
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      code = diagnostic.code,
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      tags = tags_vim_to_lsp(diagnostic),
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    }
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  end, diagnostics)
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end
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---@type table<integer, integer>
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local _client_push_namespaces = {}
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---@type table<string, integer>
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local _client_pull_namespaces = {}
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--- Get the diagnostic namespace associated with an LSP client |vim.diagnostic| for diagnostics
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---
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---@param client_id integer The id of the LSP client
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---@param is_pull boolean? Whether the namespace is for a pull or push client. Defaults to push
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function M.get_namespace(client_id, is_pull)
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  vim.validate('client_id', client_id, 'number')
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  local client = vim.lsp.get_client_by_id(client_id)
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  if is_pull then
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    local server_id =
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      vim.tbl_get((client or {}).server_capabilities, 'diagnosticProvider', 'identifier')
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    local key = string.format('%d:%s', client_id, server_id or 'nil')
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    local name = string.format(
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      'vim.lsp.%s.%d.%s',
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      client and client.name or 'unknown',
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      client_id,
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      server_id or 'nil'
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    )
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    local ns = _client_pull_namespaces[key]
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    if not ns then
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      ns = api.nvim_create_namespace(name)
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      _client_pull_namespaces[key] = ns
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    end
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    return ns
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  else
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    local name = string.format('vim.lsp.%s.%d', client and client.name or 'unknown', client_id)
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    local ns = _client_push_namespaces[client_id]
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    if not ns then
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      ns = api.nvim_create_namespace(name)
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      _client_push_namespaces[client_id] = ns
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    end
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    return ns
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  end
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end
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local function convert_severity(opt)
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  if type(opt) == 'table' and not opt.severity and opt.severity_limit then
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    vim.deprecate('severity_limit', '{min = severity} See vim.diagnostic.severity', '0.11')
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    opt.severity = { min = severity_lsp_to_vim(opt.severity_limit) }
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  end
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end
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--- @param uri string
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--- @param client_id? integer
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--- @param diagnostics vim.Diagnostic[]
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--- @param is_pull boolean
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local function handle_diagnostics(uri, client_id, diagnostics, is_pull)
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  local fname = vim.uri_to_fname(uri)
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  if #diagnostics == 0 and vim.fn.bufexists(fname) == 0 then
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    return
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  end
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  local bufnr = vim.fn.bufadd(fname)
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  if not bufnr then
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    return
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  end
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  if client_id == nil then
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    client_id = DEFAULT_CLIENT_ID
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  end
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  local namespace = M.get_namespace(client_id, is_pull)
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  vim.diagnostic.set(namespace, bufnr, diagnostic_lsp_to_vim(diagnostics, bufnr, client_id))
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end
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--- |lsp-handler| for the method "textDocument/publishDiagnostics"
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---
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--- See |vim.diagnostic.config()| for configuration options.
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---
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---@param _ lsp.ResponseError?
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---@param result lsp.PublishDiagnosticsParams
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---@param ctx lsp.HandlerContext
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function M.on_publish_diagnostics(_, result, ctx)
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  handle_diagnostics(result.uri, ctx.client_id, result.diagnostics, false)
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end
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--- |lsp-handler| for the method "textDocument/diagnostic"
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---
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--- See |vim.diagnostic.config()| for configuration options.
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---
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---@param error lsp.ResponseError?
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---@param result lsp.DocumentDiagnosticReport
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---@param ctx lsp.HandlerContext
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function M.on_diagnostic(error, result, ctx)
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  if error ~= nil and error.code == protocol.ErrorCodes.ServerCancelled then
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    if error.data == nil or error.data.retriggerRequest ~= false then
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      local client = assert(vim.lsp.get_client_by_id(ctx.client_id))
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      client:request(ctx.method, ctx.params)
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    end
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    return
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  end
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  if result == nil or result.kind == 'unchanged' then
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    return
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  end
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  handle_diagnostics(ctx.params.textDocument.uri, ctx.client_id, result.items, true)
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end
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--- Clear push diagnostics and diagnostic cache.
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---
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--- Diagnostic producers should prefer |vim.diagnostic.reset()|. However,
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--- this method signature is still used internally in some parts of the LSP
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--- implementation so it's simply marked @private rather than @deprecated.
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---
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---@param client_id integer
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---@param buffer_client_map table<integer, table<integer, table>> map of buffers to active clients
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---@private
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function M.reset(client_id, buffer_client_map)
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  buffer_client_map = vim.deepcopy(buffer_client_map)
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  vim.schedule(function()
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    for bufnr, client_ids in pairs(buffer_client_map) do
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      if client_ids[client_id] then
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        local namespace = M.get_namespace(client_id, false)
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        vim.diagnostic.reset(namespace, bufnr)
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      end
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    end
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  end)
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end
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--- Get the diagnostics by line
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---
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--- Marked private as this is used internally by the LSP subsystem, but
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--- most users should instead prefer |vim.diagnostic.get()|.
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---
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---@param bufnr integer|nil The buffer number
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---@param line_nr integer|nil The line number
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---@param opts {severity?:lsp.DiagnosticSeverity}?
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---         - severity: (lsp.DiagnosticSeverity)
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---             - Only return diagnostics with this severity.
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---@param client_id integer|nil the client id
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---@return table Table with map of line number to list of diagnostics.
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---              Structured: { [1] = {...}, [5] = {.... } }
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---@private
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function M.get_line_diagnostics(bufnr, line_nr, opts, client_id)
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  vim.deprecate('vim.lsp.diagnostic.get_line_diagnostics', 'vim.diagnostic.get', '0.12')
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  convert_severity(opts)
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  local diag_opts = {} --- @type vim.diagnostic.GetOpts
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  if opts and opts.severity then
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    diag_opts.severity = severity_lsp_to_vim(opts.severity)
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  end
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  if client_id then
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    diag_opts.namespace = M.get_namespace(client_id, false)
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  end
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  diag_opts.lnum = line_nr or (api.nvim_win_get_cursor(0)[1] - 1)
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  return M.from(vim.diagnostic.get(bufnr, diag_opts))
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end
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--- Clear diagnostics from pull based clients
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--- @private
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local function clear(bufnr)
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  for _, namespace in pairs(_client_pull_namespaces) do
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    vim.diagnostic.reset(namespace, bufnr)
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  end
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end
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---@class (private) lsp.diagnostic.bufstate
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---@field enabled boolean Whether inlay hints are enabled for this buffer
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---@type table<integer, lsp.diagnostic.bufstate>
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local bufstates = {}
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--- Disable pull diagnostics for a buffer
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--- @param bufnr integer
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--- @private
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local function disable(bufnr)
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  local bufstate = bufstates[bufnr]
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  if bufstate then
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    bufstate.enabled = false
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  end
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  clear(bufnr)
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end
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--- Refresh diagnostics, only if we have attached clients that support it
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---@param bufnr (integer) buffer number
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---@param opts? table Additional options to pass to util._refresh
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---@private
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local function _refresh(bufnr, opts)
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  opts = opts or {}
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  opts['bufnr'] = bufnr
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  vim.lsp.util._refresh(ms.textDocument_diagnostic, opts)
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end
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--- Enable pull diagnostics for a buffer
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---@param bufnr (integer) Buffer handle, or 0 for current
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---@private
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function M._enable(bufnr)
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  bufnr = vim._resolve_bufnr(bufnr)
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  if not bufstates[bufnr] then
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    bufstates[bufnr] = { enabled = true }
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    api.nvim_create_autocmd('LspNotify', {
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      buffer = bufnr,
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      callback = function(opts)
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        if
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          opts.data.method ~= ms.textDocument_didChange
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          and opts.data.method ~= ms.textDocument_didOpen
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        then
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          return
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        end
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        if bufstates[bufnr] and bufstates[bufnr].enabled then
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          local client_id = opts.data.client_id --- @type integer?
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          _refresh(bufnr, { only_visible = true, client_id = client_id })
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        end
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      end,
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      group = augroup,
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    })
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    api.nvim_buf_attach(bufnr, false, {
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      on_reload = function()
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        if bufstates[bufnr] and bufstates[bufnr].enabled then
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          _refresh(bufnr)
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        end
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      end,
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      on_detach = function()
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        disable(bufnr)
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      end,
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    })
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    api.nvim_create_autocmd('LspDetach', {
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      buffer = bufnr,
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      callback = function(args)
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        local clients = vim.lsp.get_clients({ bufnr = bufnr, method = ms.textDocument_diagnostic })
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        if
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          not vim.iter(clients):any(function(c)
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            return c.id ~= args.data.client_id
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          end)
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        then
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          disable(bufnr)
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        end
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      end,
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      group = augroup,
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    })
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  else
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    bufstates[bufnr].enabled = true
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  end
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end
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return M
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