mirror of
https://github.com/neovim/neovim.git
synced 2025-01-01 17:23:36 -07:00
fbe40caa7c
Improve error messages for `:InspectTree`, when no parsers are available for the current buffer and filetype. We can show more informative and helpful error message for users (e.g., which lang was searched for): ``` ... No parser available for the given buffer: +... no parser for 'custom_ft' language, see :help treesitter-parsers ``` Also improve the relevant docs for *treesitter-parsers*.
644 lines
19 KiB
Lua
644 lines
19 KiB
Lua
local api = vim.api
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---@class TSDevModule
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local M = {}
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---@class TSTreeView
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---@field ns integer API namespace
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---@field opts table Options table with the following keys:
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--- - anon (boolean): If true, display anonymous nodes
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--- - lang (boolean): If true, display the language alongside each node
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--- - indent (number): Number of spaces to indent nested lines. Default is 2.
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---@field nodes TSP.Node[]
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---@field named TSP.Node[]
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local TSTreeView = {}
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---@class TSP.Node
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---@field node TSNode Tree-sitter node
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---@field field string? Node field
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---@field depth integer Depth of this node in the tree
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---@field text string? Text displayed in the inspector for this node. Not computed until the
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--- inspector is drawn.
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---@field lang string Source language of this node
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---@class TSP.Injection
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---@field lang string Source language of this injection
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---@field root TSNode Root node of the injection
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--- Traverse all child nodes starting at {node}.
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---
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--- This is a recursive function. The {depth} parameter indicates the current recursion level.
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--- {lang} is a string indicating the language of the tree currently being traversed. Each traversed
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--- node is added to {tree}. When recursion completes, {tree} is an array of all nodes in the order
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--- they were visited.
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---
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--- {injections} is a table mapping node ids from the primary tree to language tree injections. Each
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--- injected language has a series of trees nested within the primary language's tree, and the root
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--- node of each of these trees is contained within a node in the primary tree. The {injections}
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--- table maps nodes in the primary tree to root nodes of injected trees.
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---
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---@param node TSNode Starting node to begin traversal |tsnode|
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---@param depth integer Current recursion depth
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---@param lang string Language of the tree currently being traversed
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---@param injections table<string, TSP.Injection> Mapping of node ids to root nodes
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--- of injected language trees (see explanation above)
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---@param tree TSP.Node[] Output table containing a list of tables each representing a node in the tree
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local function traverse(node, depth, lang, injections, tree)
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local injection = injections[node:id()]
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if injection then
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traverse(injection.root, depth, injection.lang, injections, tree)
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end
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for child, field in node:iter_children() do
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table.insert(tree, {
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node = child,
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field = field,
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depth = depth,
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lang = lang,
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})
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traverse(child, depth + 1, lang, injections, tree)
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end
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return tree
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end
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--- Create a new treesitter view.
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---
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---@param bufnr integer Source buffer number
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---@param lang string|nil Language of source buffer
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---
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---@return TSTreeView|nil
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---@return string|nil Error message, if any
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---
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---@package
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function TSTreeView:new(bufnr, lang)
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local ok, parser = pcall(vim.treesitter.get_parser, bufnr or 0, lang)
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if not ok then
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local err = parser --[[ @as string ]]
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return nil, 'No parser available for the given buffer:\n' .. err
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end
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-- For each child tree (injected language), find the root of the tree and locate the node within
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-- the primary tree that contains that root. Add a mapping from the node in the primary tree to
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-- the root in the child tree to the {injections} table.
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local root = parser:parse(true)[1]:root()
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local injections = {} ---@type table<string, TSP.Injection>
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parser:for_each_tree(function(parent_tree, parent_ltree)
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local parent = parent_tree:root()
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for _, child in pairs(parent_ltree:children()) do
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for _, tree in pairs(child:trees()) do
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local r = tree:root()
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local node = assert(parent:named_descendant_for_range(r:range()))
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local id = node:id()
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if not injections[id] or r:byte_length() > injections[id].root:byte_length() then
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injections[id] = {
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lang = child:lang(),
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root = r,
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}
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end
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end
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end
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end)
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local nodes = traverse(root, 0, parser:lang(), injections, {})
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local named = {} ---@type TSP.Node[]
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for _, v in ipairs(nodes) do
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if v.node:named() then
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named[#named + 1] = v
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end
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end
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local t = {
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ns = api.nvim_create_namespace('treesitter/dev-inspect'),
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nodes = nodes,
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named = named,
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opts = {
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anon = false,
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lang = false,
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indent = 2,
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},
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}
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setmetatable(t, self)
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self.__index = self
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return t
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end
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local decor_ns = api.nvim_create_namespace('ts.dev')
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---@param lnum integer
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---@param col integer
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---@param end_lnum integer
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---@param end_col integer
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---@return string
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local function get_range_str(lnum, col, end_lnum, end_col)
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if lnum == end_lnum then
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return string.format('[%d:%d - %d]', lnum + 1, col + 1, end_col)
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end
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return string.format('[%d:%d - %d:%d]', lnum + 1, col + 1, end_lnum + 1, end_col)
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end
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---@param w integer
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---@return boolean closed Whether the window was closed.
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local function close_win(w)
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if api.nvim_win_is_valid(w) then
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api.nvim_win_close(w, true)
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return true
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end
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return false
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end
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---@param w integer
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---@param b integer
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local function set_dev_properties(w, b)
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vim.wo[w].scrolloff = 5
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vim.wo[w].wrap = false
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vim.wo[w].foldmethod = 'manual' -- disable folding
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vim.bo[b].buflisted = false
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vim.bo[b].buftype = 'nofile'
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vim.bo[b].bufhidden = 'wipe'
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vim.bo[b].filetype = 'query'
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end
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--- Updates the cursor position in the inspector to match the node under the cursor.
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---
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--- @param treeview TSTreeView
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--- @param lang string
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--- @param source_buf integer
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--- @param inspect_buf integer
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--- @param inspect_win integer
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--- @param pos? { [1]: integer, [2]: integer }
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local function set_inspector_cursor(treeview, lang, source_buf, inspect_buf, inspect_win, pos)
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api.nvim_buf_clear_namespace(inspect_buf, treeview.ns, 0, -1)
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local cursor_node = vim.treesitter.get_node({
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bufnr = source_buf,
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lang = lang,
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pos = pos,
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ignore_injections = false,
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})
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if not cursor_node then
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return
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end
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local cursor_node_id = cursor_node:id()
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for i, v in treeview:iter() do
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if v.node:id() == cursor_node_id then
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local start = v.depth * treeview.opts.indent ---@type integer
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local end_col = start + #v.text
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api.nvim_buf_set_extmark(inspect_buf, treeview.ns, i - 1, start, {
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end_col = end_col,
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hl_group = 'Visual',
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})
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api.nvim_win_set_cursor(inspect_win, { i, 0 })
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break
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end
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end
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end
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--- Write the contents of this View into {bufnr}.
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---
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--- Calling this function computes the text that is displayed for each node.
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---
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---@param bufnr integer Buffer number to write into.
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---@package
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function TSTreeView:draw(bufnr)
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vim.bo[bufnr].modifiable = true
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local lines = {} ---@type string[]
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local lang_hl_marks = {} ---@type table[]
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for i, item in self:iter() do
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local range_str = get_range_str(item.node:range())
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local lang_str = self.opts.lang and string.format(' %s', item.lang) or ''
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local text ---@type string
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if item.node:named() then
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if item.field then
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text = string.format('%s: (%s', item.field, item.node:type())
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else
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text = string.format('(%s', item.node:type())
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end
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else
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text = string.format('"%s"', item.node:type():gsub('\n', '\\n'):gsub('"', '\\"'))
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end
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local next = self:get(i + 1)
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if not next or next.depth <= item.depth then
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local parens = item.depth - (next and next.depth or 0) + (item.node:named() and 1 or 0)
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if parens > 0 then
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text = string.format('%s%s', text, string.rep(')', parens))
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end
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end
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item.text = text
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local line = string.format(
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'%s%s ; %s%s',
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string.rep(' ', item.depth * self.opts.indent),
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text,
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range_str,
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lang_str
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)
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if self.opts.lang then
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lang_hl_marks[#lang_hl_marks + 1] = {
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col = #line - #lang_str,
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end_col = #line,
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}
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end
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lines[i] = line
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end
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api.nvim_buf_set_lines(bufnr, 0, -1, false, lines)
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api.nvim_buf_clear_namespace(bufnr, decor_ns, 0, -1)
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for i, m in ipairs(lang_hl_marks) do
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api.nvim_buf_set_extmark(bufnr, decor_ns, i - 1, m.col, {
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hl_group = 'Title',
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end_col = m.end_col,
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})
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end
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vim.bo[bufnr].modifiable = false
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end
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--- Get node {i} from this View.
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---
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--- The node number is dependent on whether or not anonymous nodes are displayed.
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---
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---@param i integer Node number to get
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---@return TSP.Node
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---@package
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function TSTreeView:get(i)
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local t = self.opts.anon and self.nodes or self.named
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return t[i]
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end
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--- Iterate over all of the nodes in this View.
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---
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---@return (fun(): integer, TSP.Node) Iterator over all nodes in this View
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---@return table
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---@return integer
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---@package
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function TSTreeView:iter()
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return ipairs(self.opts.anon and self.nodes or self.named)
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end
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--- @class InspectTreeOpts
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--- @field lang string? The language of the source buffer. If omitted, the
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--- filetype of the source buffer is used.
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--- @field bufnr integer? Buffer to draw the tree into. If omitted, a new
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--- buffer is created.
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--- @field winid integer? Window id to display the tree buffer in. If omitted,
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--- a new window is created with {command}.
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--- @field command string? Vimscript command to create the window. Default
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--- value is "60vnew". Only used when {winid} is nil.
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--- @field title (string|fun(bufnr:integer):string|nil) Title of the window. If a
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--- function, it accepts the buffer number of the source
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--- buffer as its only argument and should return a string.
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--- @private
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---
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--- @param opts InspectTreeOpts?
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function M.inspect_tree(opts)
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vim.validate({
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opts = { opts, 't', true },
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})
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opts = opts or {}
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local buf = api.nvim_get_current_buf()
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local win = api.nvim_get_current_win()
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local treeview = assert(TSTreeView:new(buf, opts.lang))
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-- Close any existing inspector window
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if vim.b[buf].dev_inspect then
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close_win(vim.b[buf].dev_inspect)
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end
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local w = opts.winid
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if not w then
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vim.cmd(opts.command or '60vnew')
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w = api.nvim_get_current_win()
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end
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local b = opts.bufnr
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if b then
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api.nvim_win_set_buf(w, b)
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else
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b = api.nvim_win_get_buf(w)
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end
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vim.b[buf].dev_inspect = w
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vim.b[b].dev_base = win -- base window handle
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vim.b[b].disable_query_linter = true
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set_dev_properties(w, b)
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local title --- @type string?
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local opts_title = opts.title
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if not opts_title then
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local bufname = api.nvim_buf_get_name(buf)
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title = string.format('Syntax tree for %s', vim.fn.fnamemodify(bufname, ':.'))
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elseif type(opts_title) == 'function' then
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title = opts_title(buf)
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end
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assert(type(title) == 'string', 'Window title must be a string')
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api.nvim_buf_set_name(b, title)
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treeview:draw(b)
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local cursor = api.nvim_win_get_cursor(win)
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set_inspector_cursor(treeview, opts.lang, buf, b, w, { cursor[1] - 1, cursor[2] })
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api.nvim_buf_clear_namespace(buf, treeview.ns, 0, -1)
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api.nvim_buf_set_keymap(b, 'n', '<CR>', '', {
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desc = 'Jump to the node under the cursor in the source buffer',
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callback = function()
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local row = api.nvim_win_get_cursor(w)[1]
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local lnum, col = treeview:get(row).node:start()
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api.nvim_set_current_win(win)
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api.nvim_win_set_cursor(win, { lnum + 1, col })
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end,
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})
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api.nvim_buf_set_keymap(b, 'n', 'a', '', {
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desc = 'Toggle anonymous nodes',
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callback = function()
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local row, col = unpack(api.nvim_win_get_cursor(w)) ---@type integer, integer
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local curnode = treeview:get(row)
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while curnode and not curnode.node:named() do
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row = row - 1
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curnode = treeview:get(row)
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end
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treeview.opts.anon = not treeview.opts.anon
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treeview:draw(b)
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if not curnode then
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return
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end
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local id = curnode.node:id()
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for i, node in treeview:iter() do
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if node.node:id() == id then
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api.nvim_win_set_cursor(w, { i, col })
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break
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end
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end
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end,
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})
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api.nvim_buf_set_keymap(b, 'n', 'I', '', {
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desc = 'Toggle language display',
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callback = function()
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treeview.opts.lang = not treeview.opts.lang
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treeview:draw(b)
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end,
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})
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api.nvim_buf_set_keymap(b, 'n', 'o', '', {
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desc = 'Toggle query editor',
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callback = function()
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local edit_w = vim.b[buf].dev_edit
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if not edit_w or not close_win(edit_w) then
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M.edit_query()
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end
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end,
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})
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local group = api.nvim_create_augroup('treesitter/dev', {})
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api.nvim_create_autocmd('CursorMoved', {
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group = group,
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buffer = b,
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callback = function()
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if not api.nvim_buf_is_loaded(buf) then
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return true
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end
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api.nvim_buf_clear_namespace(buf, treeview.ns, 0, -1)
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local row = api.nvim_win_get_cursor(w)[1]
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local lnum, col, end_lnum, end_col = treeview:get(row).node:range()
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api.nvim_buf_set_extmark(buf, treeview.ns, lnum, col, {
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end_row = end_lnum,
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end_col = math.max(0, end_col),
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hl_group = 'Visual',
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})
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local topline, botline = vim.fn.line('w0', win), vim.fn.line('w$', win)
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-- Move the cursor if highlighted range is completely out of view
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if lnum < topline and end_lnum < topline then
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api.nvim_win_set_cursor(win, { end_lnum + 1, 0 })
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elseif lnum > botline and end_lnum > botline then
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api.nvim_win_set_cursor(win, { lnum + 1, 0 })
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end
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end,
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})
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api.nvim_create_autocmd('CursorMoved', {
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group = group,
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buffer = buf,
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callback = function()
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if not api.nvim_buf_is_loaded(b) then
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return true
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end
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set_inspector_cursor(treeview, opts.lang, buf, b, w)
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end,
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})
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api.nvim_create_autocmd({ 'TextChanged', 'InsertLeave' }, {
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group = group,
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buffer = buf,
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callback = function()
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if not api.nvim_buf_is_loaded(b) then
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return true
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end
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treeview = assert(TSTreeView:new(buf, opts.lang))
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treeview:draw(b)
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end,
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})
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api.nvim_create_autocmd('BufLeave', {
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group = group,
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buffer = b,
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callback = function()
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if not api.nvim_buf_is_loaded(buf) then
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return true
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end
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api.nvim_buf_clear_namespace(buf, treeview.ns, 0, -1)
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end,
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})
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api.nvim_create_autocmd('BufLeave', {
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group = group,
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buffer = buf,
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callback = function()
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if not api.nvim_buf_is_loaded(b) then
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return true
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end
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api.nvim_buf_clear_namespace(b, treeview.ns, 0, -1)
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end,
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})
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api.nvim_create_autocmd('BufHidden', {
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group = group,
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buffer = buf,
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once = true,
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callback = function()
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close_win(w)
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end,
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})
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end
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local edit_ns = api.nvim_create_namespace('treesitter/dev-edit')
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---@param query_win integer
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---@param base_win integer
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---@param lang string
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local function update_editor_highlights(query_win, base_win, lang)
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local base_buf = api.nvim_win_get_buf(base_win)
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local query_buf = api.nvim_win_get_buf(query_win)
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local parser = vim.treesitter.get_parser(base_buf, lang)
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api.nvim_buf_clear_namespace(base_buf, edit_ns, 0, -1)
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local query_content = table.concat(api.nvim_buf_get_lines(query_buf, 0, -1, false), '\n')
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local ok_query, query = pcall(vim.treesitter.query.parse, lang, query_content)
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if not ok_query then
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return
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end
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local cursor_word = vim.fn.expand('<cword>') --[[@as string]]
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-- Only highlight captures if the cursor is on a capture name
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if cursor_word:find('^@') == nil then
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return
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end
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-- Remove the '@' from the cursor word
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cursor_word = cursor_word:sub(2)
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local topline, botline = vim.fn.line('w0', base_win), vim.fn.line('w$', base_win)
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for id, node in query:iter_captures(parser:trees()[1]:root(), base_buf, topline - 1, botline) do
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local capture_name = query.captures[id]
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if capture_name == cursor_word then
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local lnum, col, end_lnum, end_col = node:range()
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api.nvim_buf_set_extmark(base_buf, edit_ns, lnum, col, {
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end_row = end_lnum,
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end_col = end_col,
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hl_group = 'Visual',
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virt_text = {
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{ capture_name, 'Title' },
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},
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})
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end
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end
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end
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--- @private
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--- @param lang? string language to open the query editor for.
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function M.edit_query(lang)
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local buf = api.nvim_get_current_buf()
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local win = api.nvim_get_current_win()
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-- Close any existing editor window
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if vim.b[buf].dev_edit then
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close_win(vim.b[buf].dev_edit)
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end
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|
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local cmd = '60vnew'
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-- If the inspector is open, place the editor above it.
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local base_win = vim.b[buf].dev_base ---@type integer?
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local base_buf = base_win and api.nvim_win_get_buf(base_win)
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local inspect_win = base_buf and vim.b[base_buf].dev_inspect
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if base_win and base_buf and api.nvim_win_is_valid(inspect_win) then
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vim.api.nvim_set_current_win(inspect_win)
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buf = base_buf
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win = base_win
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cmd = 'new'
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end
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vim.cmd(cmd)
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|
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local ok, parser = pcall(vim.treesitter.get_parser, buf, lang)
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if not ok then
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return nil, 'No parser available for the given buffer'
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end
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lang = parser:lang()
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local query_win = api.nvim_get_current_win()
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local query_buf = api.nvim_win_get_buf(query_win)
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|
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vim.b[buf].dev_edit = query_win
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vim.bo[query_buf].omnifunc = 'v:lua.vim.treesitter.query.omnifunc'
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set_dev_properties(query_win, query_buf)
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|
|
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-- Note that omnifunc guesses the language based on the containing folder,
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-- so we add the parser's language to the buffer's name so that omnifunc
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-- can infer the language later.
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api.nvim_buf_set_name(query_buf, string.format('%s/query_editor.scm', lang))
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|
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local group = api.nvim_create_augroup('treesitter/dev-edit', {})
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api.nvim_create_autocmd({ 'TextChanged', 'InsertLeave' }, {
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group = group,
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buffer = query_buf,
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desc = 'Update query editor diagnostics when the query changes',
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callback = function()
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vim.treesitter.query.lint(query_buf, { langs = lang, clear = false })
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end,
|
|
})
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api.nvim_create_autocmd({ 'TextChanged', 'InsertLeave', 'CursorMoved', 'BufEnter' }, {
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|
group = group,
|
|
buffer = query_buf,
|
|
desc = 'Update query editor highlights when the cursor moves',
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|
callback = function()
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|
if api.nvim_win_is_valid(win) then
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|
update_editor_highlights(query_win, win, lang)
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|
end
|
|
end,
|
|
})
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|
api.nvim_create_autocmd('BufLeave', {
|
|
group = group,
|
|
buffer = query_buf,
|
|
desc = 'Clear highlights when leaving the query editor',
|
|
callback = function()
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|
api.nvim_buf_clear_namespace(buf, edit_ns, 0, -1)
|
|
end,
|
|
})
|
|
api.nvim_create_autocmd('BufLeave', {
|
|
group = group,
|
|
buffer = buf,
|
|
desc = 'Clear the query editor highlights when leaving the source buffer',
|
|
callback = function()
|
|
if not api.nvim_buf_is_loaded(query_buf) then
|
|
return true
|
|
end
|
|
|
|
api.nvim_buf_clear_namespace(query_buf, edit_ns, 0, -1)
|
|
end,
|
|
})
|
|
api.nvim_create_autocmd('BufHidden', {
|
|
group = group,
|
|
buffer = buf,
|
|
desc = 'Close the editor window when the source buffer is hidden',
|
|
once = true,
|
|
callback = function()
|
|
close_win(query_win)
|
|
end,
|
|
})
|
|
|
|
api.nvim_buf_set_lines(query_buf, 0, -1, false, {
|
|
';; Write queries here (see $VIMRUNTIME/queries/ for examples).',
|
|
';; Move cursor to a capture ("@foo") to highlight matches in the source buffer.',
|
|
';; Completion for grammar nodes is available (:help compl-omni)',
|
|
'',
|
|
'',
|
|
})
|
|
vim.cmd('normal! G')
|
|
vim.cmd.startinsert()
|
|
end
|
|
|
|
return M
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