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refactor(diagnostic): make display handlers generic (#16137)
Rather than treating virtual_text, signs, and underline specially, introduce the concept of generic "handlers", of which those three are simply the defaults bundled with Nvim. Handlers are called in `vim.diagnostic.show()` and `vim.diagnostic.hide()` and are used to handle how diagnostics are displayed.
This commit is contained in:
Gregory Anders
@@ -74,6 +74,100 @@ Functions that take a severity as an optional parameter (e.g.
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The latter form allows users to specify a range of severities.
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==============================================================================
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HANDLERS *diagnostic-handlers*
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Diagnostics are shown to the user with |vim.diagnostic.show()|. The display of
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diagnostics is managed through handlers. A handler is a table with a "show"
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and (optionally) a "hide" function. The "show" function has the signature
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>
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function(namespace, bufnr, diagnostics, opts)
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<
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and is responsible for displaying or otherwise handling the given
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diagnostics. The "hide" function takes care of "cleaning up" any actions taken
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by the "show" function and has the signature
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>
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function(namespace, bufnr)
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<
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Handlers can be configured with |vim.diagnostic.config()| and added by
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creating a new key in `vim.diagnostic.handlers` (see
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|diagnostic-handlers-example|).
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The {opts} table passed to a handler is the full set of configuration options
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(that is, it is not limited to just the options for the handler itself). The
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values in the table are already resolved (i.e. if a user specifies a
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function for a config option, the function has already been evaluated).
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Nvim provides these handlers by default: "virtual_text", "signs", and
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"underline".
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*diagnostic-handlers-example*
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The example below creates a new handler that notifies the user of diagnostics
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with |vim.notify()|: >
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-- It's good practice to namespace custom handlers to avoid collisions
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vim.diagnostic.handlers["my/notify"] = {
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show = function(namespace, bufnr, diagnostics, opts)
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-- In our example, the opts table has a "log_level" option
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local level = opts["my/notify"].log_level
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local name = vim.diagnostic.get_namespace(namespace).name
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local msg = string.format("%d diagnostics in buffer %d from %s",
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#diagnostics,
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bufnr,
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name)
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vim.notify(msg, level)
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end,
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}
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-- Users can configure the handler
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vim.diagnostic.config({
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["my/notify"] = {
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log_level = vim.log.levels.INFO
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}
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})
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<
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In this example, there is nothing to do when diagnostics are hidden, so we
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omit the "hide" function.
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Existing handlers can be overriden. For example, use the following to only
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show a sign for the highest severity diagnostic on a given line: >
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-- Create a custom namespace. This will aggregate signs from all other
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-- namespaces and only show the one with the highest severity on a
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-- given line
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local ns = vim.api.nvim_create_namespace("my_namespace")
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-- Get a reference to the original signs handler
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local orig_signs_handler = vim.diagnostic.handlers.signs
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-- Override the built-in signs handler
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vim.diagnostic.handlers.signs = {
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show = function(_, bufnr, _, opts)
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-- Get all diagnostics from the whole buffer rather than just the
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-- diagnostics passed to the handler
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local diagnostics = vim.diagnostic.get(bufnr)
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-- Find the "worst" diagnostic per line
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local max_severity_per_line = {}
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for _, d in pairs(diagnostics) do
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local m = max_severity_per_line[d.lnum]
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if not m or d.severity < m.severity then
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max_severity_per_line[d.lnum] = d
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end
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end
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-- Pass the filtered diagnostics (with our custom namespace) to
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-- the original handler
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local filtered_diagnostics = vim.tbl_values(max_severity_per_line)
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orig_signs_handler.show(ns, bufnr, filtered_diagnostics, opts)
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end,
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hide = function(_, bufnr)
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orig_signs_handler.hide(ns, bufnr)
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end,
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}
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<
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==============================================================================
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HIGHLIGHTS *diagnostic-highlights*
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@@ -202,51 +296,6 @@ Example: >
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autocmd User DiagnosticsChanged lua vim.diagnostic.setqflist({open = false })
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<
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==============================================================================
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CUSTOMIZATION *diagnostic-config*
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If you need more customization over the way diagnostics are displayed than the
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built-in configuration options provide, you can override the display handler
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explicitly. For example, use the following to only show a sign for the highest
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severity diagnostic on a given line: >
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-- Disable the default signs handler
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vim.diagnostic.config({signs = false})
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-- Create a namespace. This won't be used to add any diagnostics,
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-- only to display them.
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local ns = vim.api.nvim_create_namespace("my_namespace")
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-- Create a reference to the original function
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local orig_show = vim.diagnostic.show
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local function set_signs(bufnr)
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-- Get all diagnostics from the current buffer
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local diagnostics = vim.diagnostic.get(bufnr)
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-- Find the "worst" diagnostic per line
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local max_severity_per_line = {}
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for _, d in pairs(diagnostics) do
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local m = max_severity_per_line[d.lnum]
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if not m or d.severity < m.severity then
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max_severity_per_line[d.lnum] = d
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end
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end
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-- Show the filtered diagnostics using the custom namespace. Use the
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-- reference to the original function to avoid a loop.
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local filtered_diagnostics = vim.tbl_values(max_severity_per_line)
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orig_show(ns, bufnr, filtered_diagnostics, {
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virtual_text=false,
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underline=false,
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signs=true
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})
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end
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function vim.diagnostic.show(namespace, bufnr, ...)
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orig_show(namespace, bufnr, ...)
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set_signs(bufnr)
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end
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<
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==============================================================================
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Lua module: vim.diagnostic *diagnostic-api*
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@@ -394,6 +443,15 @@ get({bufnr}, {opts}) *vim.diagnostic.get()*
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Return: ~
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table A list of diagnostic items |diagnostic-structure|.
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get_namespace({namespace}) *vim.diagnostic.get_namespace()*
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Get namespace metadata.
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Parameters: ~
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{ns} number Diagnostic namespace
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Return: ~
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table Namespace metadata
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get_namespaces() *vim.diagnostic.get_namespaces()*
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Get current diagnostic namespaces.
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@@ -619,7 +677,7 @@ show({namespace}, {bufnr}, {diagnostics}, {opts})
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Display diagnostics for the given namespace and buffer.
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Parameters: ~
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{namespace} number Diagnostic namespace
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{namespace} number Diagnostic namespace.
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{bufnr} number|nil Buffer number. Defaults to the
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current buffer.
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{diagnostics} table|nil The diagnostics to display. When
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@@ -24,6 +24,16 @@ local global_diagnostic_options = {
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severity_sort = false,
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}
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M.handlers = setmetatable({}, {
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__newindex = function(t, name, handler)
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vim.validate { handler = {handler, "t" } }
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rawset(t, name, handler)
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if not global_diagnostic_options[name] then
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global_diagnostic_options[name] = true
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end
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end,
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})
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-- Local functions {{{
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---@private
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@@ -96,31 +106,9 @@ end
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local all_namespaces = {}
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---@private
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local function get_namespace(ns)
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if not all_namespaces[ns] then
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local name
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for k, v in pairs(vim.api.nvim_get_namespaces()) do
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if ns == v then
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name = k
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break
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end
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end
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assert(name, "namespace does not exist or is anonymous")
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all_namespaces[ns] = {
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name = name,
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sign_group = string.format("vim.diagnostic.%s", name),
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opts = {}
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}
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end
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return all_namespaces[ns]
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end
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---@private
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local function enabled_value(option, namespace)
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local ns = namespace and get_namespace(namespace) or {}
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local ns = namespace and M.get_namespace(namespace) or {}
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if ns.opts and type(ns.opts[option]) == "table" then
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return ns.opts[option]
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end
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@@ -154,7 +142,7 @@ end
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---@private
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local function get_resolved_options(opts, namespace, bufnr)
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local ns = namespace and get_namespace(namespace) or {}
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local ns = namespace and M.get_namespace(namespace) or {}
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-- Do not use tbl_deep_extend so that an empty table can be used to reset to default values
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local resolved = vim.tbl_extend('keep', opts or {}, ns.opts or {}, global_diagnostic_options)
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for k in pairs(global_diagnostic_options) do
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@@ -343,7 +331,7 @@ local registered_autocmds = {}
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---@private
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local function make_augroup_key(namespace, bufnr)
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local ns = get_namespace(namespace)
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local ns = M.get_namespace(namespace)
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return string.format("DiagnosticInsertLeave:%s:%s", bufnr, ns.name)
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end
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@@ -566,7 +554,7 @@ function M.config(opts, namespace)
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local t
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if namespace then
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local ns = get_namespace(namespace)
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local ns = M.get_namespace(namespace)
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t = ns.opts
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else
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t = global_diagnostic_options
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@@ -633,6 +621,32 @@ function M.set(namespace, bufnr, diagnostics, opts)
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vim.api.nvim_command("doautocmd <nomodeline> User DiagnosticsChanged")
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end
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--- Get namespace metadata.
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---
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---@param ns number Diagnostic namespace
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---@return table Namespace metadata
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function M.get_namespace(namespace)
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vim.validate { namespace = { namespace, 'n' } }
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if not all_namespaces[namespace] then
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local name
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for k, v in pairs(vim.api.nvim_get_namespaces()) do
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if namespace == v then
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name = k
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break
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end
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end
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assert(name, "namespace does not exist or is anonymous")
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all_namespaces[namespace] = {
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name = name,
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opts = {},
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user_data = {},
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}
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end
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return all_namespaces[namespace]
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end
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--- Get current diagnostic namespaces.
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---
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---@return table A list of active diagnostic namespaces |vim.diagnostic|.
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@@ -782,156 +796,167 @@ function M.goto_next(opts)
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)
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end
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-- Diagnostic Setters {{{
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M.handlers.signs = {
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show = function(namespace, bufnr, diagnostics, opts)
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vim.validate {
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namespace = {namespace, 'n'},
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bufnr = {bufnr, 'n'},
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diagnostics = {diagnostics, 't'},
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opts = {opts, 't', true},
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}
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--- Set signs for given diagnostics.
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---
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---@param namespace number The diagnostic namespace
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---@param bufnr number Buffer number
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---@param diagnostics table A list of diagnostic items |diagnostic-structure|. When omitted the
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--- current diagnostics in the given buffer are used.
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---@param opts table Configuration table with the following keys:
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--- - priority: Set the priority of the signs |sign-priority|.
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---@private
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function M._set_signs(namespace, bufnr, diagnostics, opts)
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vim.validate {
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namespace = {namespace, 'n'},
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bufnr = {bufnr, 'n'},
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diagnostics = {diagnostics, 't'},
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opts = {opts, 't', true},
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}
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bufnr = get_bufnr(bufnr)
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bufnr = get_bufnr(bufnr)
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opts = get_resolved_options({ signs = opts }, namespace, bufnr)
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if opts.signs and opts.signs.severity then
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diagnostics = filter_by_severity(opts.signs.severity, diagnostics)
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end
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if opts.signs and opts.signs.severity then
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diagnostics = filter_by_severity(opts.signs.severity, diagnostics)
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end
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define_default_signs()
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local ns = get_namespace(namespace)
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define_default_signs()
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-- 10 is the default sign priority when none is explicitly specified
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local priority = opts.signs and opts.signs.priority or 10
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local get_priority
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if opts.severity_sort then
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if type(opts.severity_sort) == "table" and opts.severity_sort.reverse then
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get_priority = function(severity)
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return priority + (severity - vim.diagnostic.severity.ERROR)
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-- 10 is the default sign priority when none is explicitly specified
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local priority = opts.signs and opts.signs.priority or 10
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local get_priority
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if opts.severity_sort then
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if type(opts.severity_sort) == "table" and opts.severity_sort.reverse then
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get_priority = function(severity)
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return priority + (severity - vim.diagnostic.severity.ERROR)
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end
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else
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get_priority = function(severity)
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return priority + (vim.diagnostic.severity.HINT - severity)
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end
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end
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else
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get_priority = function(severity)
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return priority + (vim.diagnostic.severity.HINT - severity)
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get_priority = function()
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return priority
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end
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end
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else
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get_priority = function()
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return priority
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end
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end
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for _, diagnostic in ipairs(diagnostics) do
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vim.fn.sign_place(
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0,
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ns.sign_group,
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sign_highlight_map[diagnostic.severity],
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bufnr,
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{
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priority = get_priority(diagnostic.severity),
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lnum = diagnostic.lnum + 1
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}
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)
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end
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end
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--- Set underline for given diagnostics.
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---
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---@param namespace number The diagnostic namespace
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---@param bufnr number Buffer number
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---@param diagnostics table A list of diagnostic items |diagnostic-structure|. When omitted the
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--- current diagnostics in the given buffer are used.
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---@param opts table Configuration table. Currently unused.
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---@private
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function M._set_underline(namespace, bufnr, diagnostics, opts)
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vim.validate {
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namespace = {namespace, 'n'},
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bufnr = {bufnr, 'n'},
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diagnostics = {diagnostics, 't'},
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opts = {opts, 't', true},
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}
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bufnr = get_bufnr(bufnr)
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opts = get_resolved_options({ underline = opts }, namespace, bufnr).underline
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if opts and opts.severity then
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diagnostics = filter_by_severity(opts.severity, diagnostics)
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end
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for _, diagnostic in ipairs(diagnostics) do
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local higroup = underline_highlight_map[diagnostic.severity]
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if higroup == nil then
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-- Default to error if we don't have a highlight associated
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higroup = underline_highlight_map.Error
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local ns = M.get_namespace(namespace)
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if not ns.user_data.sign_group then
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ns.user_data.sign_group = string.format("vim.diagnostic.%s", ns.name)
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end
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vim.highlight.range(
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bufnr,
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namespace,
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higroup,
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{ diagnostic.lnum, diagnostic.col },
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{ diagnostic.end_lnum, diagnostic.end_col }
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)
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end
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end
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--- Set virtual text for given diagnostics.
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---
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---@param namespace number The diagnostic namespace
|
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---@param bufnr number Buffer number
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---@param diagnostics table A list of diagnostic items |diagnostic-structure|. When omitted the
|
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--- current diagnostics in the given buffer are used.
|
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---@param opts table|nil Configuration table with the following keys:
|
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--- - prefix: (string) Prefix to display before virtual text on line.
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--- - spacing: (number) Number of spaces to insert before virtual text.
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--- - source: (string) Include the diagnostic source in virtual text. One of "always" or
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--- "if_many".
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---@private
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function M._set_virtual_text(namespace, bufnr, diagnostics, opts)
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vim.validate {
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namespace = {namespace, 'n'},
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bufnr = {bufnr, 'n'},
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diagnostics = {diagnostics, 't'},
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opts = {opts, 't', true},
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}
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bufnr = get_bufnr(bufnr)
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opts = get_resolved_options({ virtual_text = opts }, namespace, bufnr).virtual_text
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if opts and opts.format then
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diagnostics = reformat_diagnostics(opts.format, diagnostics)
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end
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if opts and opts.source then
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diagnostics = prefix_source(opts.source, diagnostics)
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end
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local buffer_line_diagnostics = diagnostic_lines(diagnostics)
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for line, line_diagnostics in pairs(buffer_line_diagnostics) do
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if opts and opts.severity then
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line_diagnostics = filter_by_severity(opts.severity, line_diagnostics)
|
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local sign_group = ns.user_data.sign_group
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for _, diagnostic in ipairs(diagnostics) do
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vim.fn.sign_place(
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0,
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sign_group,
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sign_highlight_map[diagnostic.severity],
|
||||
bufnr,
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||||
{
|
||||
priority = get_priority(diagnostic.severity),
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lnum = diagnostic.lnum + 1
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}
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)
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end
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local virt_texts = M._get_virt_text_chunks(line_diagnostics, opts)
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end,
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hide = function(namespace, bufnr)
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local ns = M.get_namespace(namespace)
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if ns.user_data.sign_group then
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vim.fn.sign_unplace(ns.user_data.sign_group, {buffer=bufnr})
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end
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end,
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||||
}
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|
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if virt_texts then
|
||||
vim.api.nvim_buf_set_extmark(bufnr, namespace, line, 0, {
|
||||
hl_mode = "combine",
|
||||
virt_text = virt_texts,
|
||||
})
|
||||
M.handlers.underline = {
|
||||
show = function(namespace, bufnr, diagnostics, opts)
|
||||
vim.validate {
|
||||
namespace = {namespace, 'n'},
|
||||
bufnr = {bufnr, 'n'},
|
||||
diagnostics = {diagnostics, 't'},
|
||||
opts = {opts, 't', true},
|
||||
}
|
||||
|
||||
bufnr = get_bufnr(bufnr)
|
||||
|
||||
if opts.underline and opts.underline.severity then
|
||||
diagnostics = filter_by_severity(opts.underline.severity, diagnostics)
|
||||
end
|
||||
|
||||
local ns = M.get_namespace(namespace)
|
||||
if not ns.user_data.underline_ns then
|
||||
ns.user_data.underline_ns = vim.api.nvim_create_namespace("")
|
||||
end
|
||||
|
||||
local underline_ns = ns.user_data.underline_ns
|
||||
for _, diagnostic in ipairs(diagnostics) do
|
||||
local higroup = underline_highlight_map[diagnostic.severity]
|
||||
|
||||
if higroup == nil then
|
||||
-- Default to error if we don't have a highlight associated
|
||||
higroup = underline_highlight_map.Error
|
||||
end
|
||||
|
||||
vim.highlight.range(
|
||||
bufnr,
|
||||
underline_ns,
|
||||
higroup,
|
||||
{ diagnostic.lnum, diagnostic.col },
|
||||
{ diagnostic.end_lnum, diagnostic.end_col }
|
||||
)
|
||||
end
|
||||
end,
|
||||
hide = function(namespace, bufnr)
|
||||
local ns = M.get_namespace(namespace)
|
||||
if ns.user_data.underline_ns then
|
||||
vim.api.nvim_buf_clear_namespace(bufnr, ns.user_data.underline_ns, 0, -1)
|
||||
end
|
||||
end
|
||||
end
|
||||
}
|
||||
|
||||
M.handlers.virtual_text = {
|
||||
show = function(namespace, bufnr, diagnostics, opts)
|
||||
vim.validate {
|
||||
namespace = {namespace, 'n'},
|
||||
bufnr = {bufnr, 'n'},
|
||||
diagnostics = {diagnostics, 't'},
|
||||
opts = {opts, 't', true},
|
||||
}
|
||||
|
||||
bufnr = get_bufnr(bufnr)
|
||||
|
||||
local severity
|
||||
if opts.virtual_text then
|
||||
if opts.virtual_text.format then
|
||||
diagnostics = reformat_diagnostics(opts.virtual_text.format, diagnostics)
|
||||
end
|
||||
if opts.virtual_text.source then
|
||||
diagnostics = prefix_source(opts.virtual_text.source, diagnostics)
|
||||
end
|
||||
if opts.virtual_text.severity then
|
||||
severity = opts.virtual_text.severity
|
||||
end
|
||||
end
|
||||
|
||||
local ns = M.get_namespace(namespace)
|
||||
if not ns.user_data.virt_text_ns then
|
||||
ns.user_data.virt_text_ns = vim.api.nvim_create_namespace("")
|
||||
end
|
||||
|
||||
local virt_text_ns = ns.user_data.virt_text_ns
|
||||
local buffer_line_diagnostics = diagnostic_lines(diagnostics)
|
||||
for line, line_diagnostics in pairs(buffer_line_diagnostics) do
|
||||
if severity then
|
||||
line_diagnostics = filter_by_severity(severity, line_diagnostics)
|
||||
end
|
||||
local virt_texts = M._get_virt_text_chunks(line_diagnostics, opts.virtual_text)
|
||||
|
||||
if virt_texts then
|
||||
vim.api.nvim_buf_set_extmark(bufnr, virt_text_ns, line, 0, {
|
||||
hl_mode = "combine",
|
||||
virt_text = virt_texts,
|
||||
})
|
||||
end
|
||||
end
|
||||
end,
|
||||
hide = function(namespace, bufnr)
|
||||
local ns = M.get_namespace(namespace)
|
||||
if ns.user_data.virt_text_ns then
|
||||
vim.api.nvim_buf_clear_namespace(bufnr, ns.user_data.virt_text_ns, 0, -1)
|
||||
end
|
||||
end,
|
||||
}
|
||||
|
||||
--- Get virtual text chunks to display using |nvim_buf_set_extmark()|.
|
||||
---
|
||||
@@ -1011,19 +1036,16 @@ function M.hide(namespace, bufnr)
|
||||
bufnr = get_bufnr(bufnr)
|
||||
diagnostic_cache_extmarks[bufnr][namespace] = {}
|
||||
|
||||
local ns = get_namespace(namespace)
|
||||
|
||||
-- clear sign group
|
||||
vim.fn.sign_unplace(ns.sign_group, {buffer=bufnr})
|
||||
|
||||
-- clear virtual text namespace
|
||||
vim.api.nvim_buf_clear_namespace(bufnr, namespace, 0, -1)
|
||||
for _, handler in pairs(M.handlers) do
|
||||
if handler.hide then
|
||||
handler.hide(namespace, bufnr)
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
|
||||
--- Display diagnostics for the given namespace and buffer.
|
||||
---
|
||||
---@param namespace number Diagnostic namespace
|
||||
---@param namespace number Diagnostic namespace.
|
||||
---@param bufnr number|nil Buffer number. Defaults to the current buffer.
|
||||
---@param diagnostics table|nil The diagnostics to display. When omitted, use the
|
||||
--- saved diagnostics for the given namespace and
|
||||
@@ -1074,16 +1096,10 @@ function M.show(namespace, bufnr, diagnostics, opts)
|
||||
|
||||
clamp_line_numbers(bufnr, diagnostics)
|
||||
|
||||
if opts.underline then
|
||||
M._set_underline(namespace, bufnr, diagnostics, opts.underline)
|
||||
end
|
||||
|
||||
if opts.virtual_text then
|
||||
M._set_virtual_text(namespace, bufnr, diagnostics, opts.virtual_text)
|
||||
end
|
||||
|
||||
if opts.signs then
|
||||
M._set_signs(namespace, bufnr, diagnostics, opts.signs)
|
||||
for handler_name, handler in pairs(M.handlers) do
|
||||
if handler.show and opts[handler_name] then
|
||||
handler.show(namespace, bufnr, diagnostics, opts)
|
||||
end
|
||||
end
|
||||
|
||||
save_extmarks(namespace, bufnr)
|
||||
|
||||
@@ -146,7 +146,8 @@ local _client_namespaces = {}
|
||||
function M.get_namespace(client_id)
|
||||
vim.validate { client_id = { client_id, 'n' } }
|
||||
if not _client_namespaces[client_id] then
|
||||
local name = string.format("vim.lsp.client-%d", client_id)
|
||||
local client = vim.lsp.get_client_by_id(client_id)
|
||||
local name = string.format("vim.lsp.%s.%d", client.name, client_id)
|
||||
_client_namespaces[client_id] = vim.api.nvim_create_namespace(name)
|
||||
end
|
||||
return _client_namespaces[client_id]
|
||||
|
||||
Reference in New Issue
Block a user