feat: implement interactable dap hover
This commit is contained in:
@@ -0,0 +1,314 @@
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-- DAP hover implementation with tree-based display
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local Item = require("ow.dap.item")
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local Tree = require("ow.dap.hover.tree")
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local log = require("ow.log")
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---@class ow.dap.hover.Window
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---@field current_win? integer Currently active hover window ID
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---@field ns_id integer Namespace for extmarks
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---@field tree ow.dap.hover.Tree? Current tree formatter
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local Window = {}
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Window.MAX_WIDTH = nil
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Window.MAX_HEIGHT = nil
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Window.ns_id = vim.api.nvim_create_namespace("ow.dap.hover")
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---Close any existing hover window
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function Window.close()
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if Window.current_win and vim.api.nvim_win_is_valid(Window.current_win) then
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vim.api.nvim_win_close(Window.current_win, true)
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end
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Window.current_win = nil
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Window.tree = nil
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end
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---@param lines string[]
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---@return integer
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function Window.compute_width(lines)
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local max_width = 1
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for _, line in ipairs(lines) do
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if Window.MAX_WIDTH and #line >= Window.MAX_WIDTH then
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max_width = Window.MAX_WIDTH
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break
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end
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max_width = math.max(max_width, #line)
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end
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return max_width
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end
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---Create and display hover window with tree content
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---@param session dap.Session
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---@param item ow.dap.Item
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---@param lines string[]
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---@param content ow.dap.hover.Content
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function Window.show(session, item, lines, content)
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-- Create buffer
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local orig_buf = vim.api.nvim_get_current_buf()
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local buf = vim.api.nvim_create_buf(false, true)
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vim.api.nvim_buf_set_lines(buf, 0, -1, false, lines)
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-- Create window (initially hidden for size calculation)
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local win = vim.api.nvim_open_win(buf, false, {
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relative = "cursor",
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width = Window.compute_width(lines),
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height = 1,
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row = 1,
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col = 0,
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border = "rounded",
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style = "minimal",
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hide = true,
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})
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-- Calculate and apply final height
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local text_height = vim.api.nvim_win_text_height(win, {}).all
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vim.api.nvim_win_set_config(win, {
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height = math.min(Window.MAX_HEIGHT or text_height, text_height),
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hide = false,
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})
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-- Apply syntax highlighting
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content:apply_highlights(Window.ns_id, buf)
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-- Store window reference
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Window.current_win = win
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-- Set up auto-close behavior
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vim.api.nvim_create_autocmd({ "CursorMoved", "InsertEnter" }, {
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buffer = orig_buf,
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once = true,
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callback = Window.close,
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})
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vim.api.nvim_create_autocmd("WinLeave", {
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buffer = buf,
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once = true,
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callback = Window.close,
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})
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-- Set up expansion keymaps
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vim.keymap.set("n", "<CR>", function()
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Window.expand_at_cursor(buf)
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end, { buffer = buf, nowait = true })
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vim.keymap.set("n", "<Tab>", function()
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Window.expand_at_cursor(buf)
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end, { buffer = buf, nowait = true })
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end
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---Expand/collapse item at cursor position
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---@param buf integer
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function Window.expand_at_cursor(buf)
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if not Window.tree then
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return
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end
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-- Re-render the tree
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coroutine.wrap(function()
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local ok, err = xpcall(function()
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-- Toggle expansion
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local cursor = vim.api.nvim_win_get_cursor(Window.current_win)
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local success = Window.tree:toggle_at_line(cursor[1] - 1)
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if not success then
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return
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end
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local content = Window.tree:render()
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local lines = content:get_lines()
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-- TODO: possible to only update the affected lines?
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-- Update buffer content
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vim.api.nvim_set_option_value(
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"scrolloff",
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0,
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{ win = Window.current_win }
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)
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vim.api.nvim_buf_set_lines(buf, 0, -1, false, lines)
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vim.api.nvim_set_option_value(
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"scrolloff",
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vim.o.scrolloff,
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{ win = Window.current_win }
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)
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-- Re-apply highlights
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vim.api.nvim_buf_clear_namespace(buf, -1, 0, -1) -- Clear old highlights
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content:apply_highlights(Window.ns_id, buf)
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-- Adjust window size
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vim.api.nvim_win_set_config(Window.current_win, {
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width = Window.compute_width(lines),
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})
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local text_height =
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vim.api.nvim_win_text_height(Window.current_win, {}).all
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vim.api.nvim_win_set_config(Window.current_win, {
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height = math.min(
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Window.MAX_HEIGHT or text_height,
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text_height
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),
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})
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end, debug.traceback)
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if not ok then
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log.error("Expansion failed:\n%s", err)
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end
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end)()
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end
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---Main hover entry point (async)
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---@async
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---@param expr string Expression to evaluate
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---@param session dap.Session DAP session
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---@param frame_id number Current frame ID
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---@param line_nr integer Line number for context
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---@param col_nr integer Column number for context
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---@param current_file string Current file path
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local function hover_eval(
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expr,
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session,
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frame_id,
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line_nr,
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col_nr,
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current_file
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)
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-- Close existing hover window
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Window.close()
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-- Evaluate expression
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local eval_request = {
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expression = expr,
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frameId = frame_id,
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context = "hover",
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line = line_nr,
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column = col_nr,
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source = {
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path = current_file,
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},
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}
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local err, resp = session:request("evaluate", eval_request)
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if err or not resp then
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log.warning("Failed to evaluate '%s': %s", expr, err)
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return
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end
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-- Create item and tree formatter
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local item =
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Item.new(expr, resp.type, resp.result, resp.variablesReference, 0)
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local tree = Tree.new(session)
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-- Build and render tree
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tree:build(item)
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local content = tree:render()
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local lines = content:get_lines()
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-- Store formatter for expansion
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Window.tree = tree
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-- Show hover window
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Window.show(session, item, lines, content)
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end
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---Public hover function
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local function hover_async()
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-- Check if hover window is already open - focus it instead
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if Window.current_win and vim.api.nvim_win_is_valid(Window.current_win) then
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vim.api.nvim_set_current_win(Window.current_win)
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return
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end
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local dap = require("dap")
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local session = dap.session()
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if not session then
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return
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end
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local capabilities = session.capabilities or {}
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local supports_hover = capabilities.supportsEvaluateForHovers
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if not supports_hover then
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log.warning("Hover is not supported by this adapter")
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return
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end
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local cursor_pos = vim.api.nvim_win_get_cursor(0)
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local line_nr = cursor_pos[1] -- nvim-dap sets linesStartAt1=true
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local col_nr = cursor_pos[2] + 1 -- nvim-dap sets columnsStartAt1=true
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local current_file = vim.api.nvim_buf_get_name(0)
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-- Get expression under cursor
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local expr
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local mode = vim.api.nvim_get_mode()
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if mode.mode == "v" then
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-- Visual mode selection
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local start_pos = vim.fn.getpos("v")
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local end_pos = vim.fn.getpos(".")
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local start_row, start_col = start_pos[2], start_pos[3]
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local end_row, end_col = end_pos[2], end_pos[3]
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if start_row == end_row and end_col < start_col then
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start_col, end_col = end_col, start_col
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elseif end_row < start_row then
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start_row, end_row = end_row, start_row
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start_col, end_col = end_col, start_col
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end
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local lines = vim.api.nvim_buf_get_text(
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0,
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start_row - 1,
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start_col - 1,
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end_row - 1,
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end_col,
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{}
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)
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expr = table.concat(lines, "\n")
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vim.api.nvim_feedkeys(
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vim.api.nvim_replace_termcodes("<ESC>", true, false, true),
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"n",
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false
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)
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else
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expr = vim.fn.expand("<cexpr>")
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end
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if expr == "" then
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return
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end
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-- Get thread and frame information
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local thread_id
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do
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local err, resp = session:request("threads", nil)
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if err or not resp or #resp.threads == 0 then
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log.warning("Failed to get threads: %s", err)
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return
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end
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thread_id = resp.threads[1].id
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end
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local frame_id
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do
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local err, resp =
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session:request("stackTrace", { threadId = thread_id })
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if err or not resp or #resp.stackFrames == 0 then
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log.warning("Failed to get stack trace: %s", err)
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return
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end
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frame_id = resp.stackFrames[1].id
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end
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-- Evaluate and display hover
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hover_eval(expr, session, frame_id, line_nr, col_nr, current_file)
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end
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---Wrapped hover function with error handling
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local function hover()
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coroutine.wrap(function()
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local ok, err = xpcall(hover_async, debug.traceback)
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if not ok then
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log.error("Hover failed:\n%s", err)
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end
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end)()
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end
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return hover
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@@ -0,0 +1,146 @@
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-- Highlighted text content builder for DAP tree display
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local log = require("ow.log")
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---@class ow.dap.hover.content.Capture
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---@field start_col integer
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---@field end_col integer
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---@field text string
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---@field group string
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---@field priority integer
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---@class ow.dap.hover.Highlight
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---@field group string Highlight group name
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---@field start_col integer Start column (0-indexed)
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---@field end_col integer End column (0-indexed)
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---@class ow.dap.hover.Content
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---@field text string The complete text content
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---@field highlights ow.dap.hover.Highlight[] List of highlights to apply
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---@field _current_col integer Current column position (for building)
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local Content = {}
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Content.__index = Content
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---Create new highlighted content
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---@return ow.dap.hover.Content
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function Content.new()
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return setmetatable({
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text = "",
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highlights = {},
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_current_col = 0,
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}, Content)
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end
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---Add text with optional highlighting
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---@param text string Text to add
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---@param highlight_group? string Optional highlight group
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function Content:add(text, highlight_group)
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local start_col = self._current_col
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local end_col = start_col + #text
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self.text = self.text .. text
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self._current_col = end_col
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if highlight_group then
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table.insert(self.highlights, {
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group = highlight_group,
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start_col = start_col,
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end_col = end_col,
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})
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end
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end
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---Add text with tree-sitter syntax highlighting
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---@param text string The text to highlight
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---@param lang string Language for tree-sitter
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function Content:add_with_treesitter(text, lang)
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local start_col = self._current_col
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-- First, just add the text normally
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self:add(text)
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-- Then apply tree-sitter highlights on top
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local ok, parser = pcall(vim.treesitter.get_string_parser, text, lang)
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if not ok or not parser then
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return
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end
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local tree = parser:parse()[1]
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if not tree then
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return
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end
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local query = vim.treesitter.query.get(lang, "highlights")
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if not query then
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return
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end
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-- Add highlights for all captures (overlapping is fine)
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for id, node in query:iter_captures(tree:root(), text, 0, -1) do
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local capture_name = query.captures[id]
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local start_row, start_col_rel, end_row, end_col_rel = node:range()
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-- TODO: keep track of text as lines instead, so we can handle multiline
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-- highlights
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if start_row == end_row then -- Single line only
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-- Convert to absolute column positions
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local abs_start_col = start_col + start_col_rel
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local abs_end_col = start_col + end_col_rel
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-- Add the highlight
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table.insert(self.highlights, {
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group = "@" .. capture_name,
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start_col = abs_start_col,
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end_col = abs_end_col,
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})
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end
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end
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end
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---Add a newline and reset column tracking
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function Content:newline()
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self:add("\n")
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self._current_col = 0
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end
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---Get the lines as a table
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---@return string[]
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function Content:get_lines()
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return vim.split(self.text, "\n", { trimempty = true })
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end
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---Apply highlights to a buffer
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---@param ns_id integer
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---@param buf integer Buffer handle
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---@param line_offset? integer Line offset to apply highlights at (default 0)
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function Content:apply_highlights(ns_id, buf, line_offset)
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line_offset = line_offset or 0
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local lines = self:get_lines()
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local current_line = 0
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local line_start_col = 0
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for _, highlight in ipairs(self.highlights) do
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-- Find which line this highlight belongs to
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while
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current_line < #lines - 1
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and highlight.start_col
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>= line_start_col + #lines[current_line + 1] + 1
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do
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line_start_col = line_start_col + #lines[current_line + 1] + 1 -- +1 for newline
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current_line = current_line + 1
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end
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-- Calculate column positions relative to line start
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local start_col = highlight.start_col - line_start_col
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local end_col = highlight.end_col - line_start_col
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-- Apply highlight
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vim.hl.range(
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buf,
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ns_id,
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highlight.group,
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{ line_offset + current_line, start_col },
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{ line_offset + current_line, end_col }
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)
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end
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end
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return Content
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@@ -0,0 +1,141 @@
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-- Tree node representation for DAP variables
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local Content = require("ow.dap.hover.content")
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local log = require("ow.log")
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---@class ow.dap.hover.Node
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---@field item ow.dap.Item The DAP item this node represents
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---@field parent ow.dap.hover.Node? Parent node
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---@field children ow.dap.hover.Node[] Child nodes
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---@field is_expanded boolean Whether this node is expanded
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---@field line_number integer Buffer line number where this node is displayed
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---@field is_last_child boolean Whether this is the last child of its parent
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local Node = {}
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Node.__index = Node
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---Create a new tree node
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---@param item ow.dap.Item
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---@param parent ow.dap.hover.Node?
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---@return ow.dap.hover.Node
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function Node.new(item, parent)
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return setmetatable({
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item = item,
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parent = parent,
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children = {},
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is_expanded = false,
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line_number = -1,
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is_last_child = false,
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}, Node)
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end
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---Check if this node represents a container (struct/array)
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---@return boolean
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function Node:is_container()
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return self.item.variablesReference and self.item.variablesReference > 0
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or false
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end
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---Get the tree prefix for this node (├─, └─, │, etc.)
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---@return string
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function Node:get_tree_prefix()
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if not self.parent then
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return "" -- Root node has no prefix
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end
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local prefix = ""
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-- Walk up the tree to build the prefix
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local node = self.parent
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while node and node.parent do
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if node.is_last_child then
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prefix = " " .. prefix
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else
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prefix = "│ " .. prefix
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||||
end
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node = node.parent
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end
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||||
-- Add the final branch character
|
||||
if self.is_last_child then
|
||||
prefix = prefix .. "└─ "
|
||||
else
|
||||
prefix = prefix .. "├─ "
|
||||
end
|
||||
|
||||
return prefix
|
||||
end
|
||||
|
||||
---@return boolean
|
||||
function Node:is_c_array_element()
|
||||
return self.item.name:match("^%[?%d+%]?$") ~= nil
|
||||
end
|
||||
|
||||
---@return boolean
|
||||
function Node:is_c_pointer_child()
|
||||
return self.parent
|
||||
and self.parent.item.type:match(
|
||||
"%*%s*[const%s]*[volatile%s]*[restrict%s]*$"
|
||||
) ~= nil
|
||||
or false
|
||||
end
|
||||
|
||||
---@return string
|
||||
function Node:format_c_expression()
|
||||
if self:is_c_array_element() then
|
||||
return string.format(
|
||||
"%s = (%s) %s",
|
||||
self.item.name,
|
||||
self.item.type,
|
||||
self.item.value
|
||||
)
|
||||
end
|
||||
|
||||
if self:is_c_pointer_child() then
|
||||
return string.format("*%s = %s", self.parent.item.name, self.item.value)
|
||||
end
|
||||
|
||||
return string.format(
|
||||
"%s %s = %s",
|
||||
self.item.type,
|
||||
self.item.name,
|
||||
self.item.value
|
||||
)
|
||||
end
|
||||
|
||||
---Format this node as highlighted content
|
||||
---@param session dap.Session DAP session for making requests
|
||||
---@return ow.dap.hover.Content
|
||||
function Node:format(session)
|
||||
local content = Content.new()
|
||||
|
||||
-- Add expansion marker for containers
|
||||
if self:is_container() then
|
||||
local marker = self.is_expanded and "-" or "+"
|
||||
content:add(marker .. " ", "@comment")
|
||||
else
|
||||
content:add(" ")
|
||||
end
|
||||
|
||||
-- Add tree prefix
|
||||
local tree_prefix = self:get_tree_prefix()
|
||||
if tree_prefix ~= "" then
|
||||
content:add(tree_prefix, "@comment")
|
||||
end
|
||||
|
||||
local stmt
|
||||
if session.filetype == "c" or session.filetype == "cpp" then
|
||||
stmt = self:format_c_expression()
|
||||
else
|
||||
error(
|
||||
string.format("Formatting for %s not implemented", session.filetype)
|
||||
)
|
||||
end
|
||||
content:add_with_treesitter(stmt, session.filetype)
|
||||
|
||||
if self.item.value == "" then
|
||||
content:add("...", "@comment")
|
||||
end
|
||||
|
||||
return content
|
||||
end
|
||||
|
||||
return Node
|
||||
@@ -0,0 +1,156 @@
|
||||
-- Tree-based DAP variable formatter with expand/collapse support
|
||||
local Content = require("ow.dap.hover.content")
|
||||
local Node = require("ow.dap.hover.node")
|
||||
local log = require("ow.log")
|
||||
|
||||
---@class ow.dap.hover.Tree
|
||||
---@field session dap.Session
|
||||
---@field root_node ow.dap.hover.Node?
|
||||
---@field line_to_node table<integer, ow.dap.hover.Node> Map line numbers to nodes
|
||||
---@field extmark_to_node table<integer, ow.dap.hover.Node> Map extmark IDs to nodes
|
||||
local Tree = {}
|
||||
Tree.__index = Tree
|
||||
|
||||
---Create a new tree formatter
|
||||
---@param session dap.Session
|
||||
---@return ow.dap.hover.Tree
|
||||
function Tree.new(session)
|
||||
return setmetatable({
|
||||
session = session,
|
||||
root_node = nil,
|
||||
line_to_node = {},
|
||||
extmark_to_node = {},
|
||||
}, Tree)
|
||||
end
|
||||
|
||||
---Build the tree from a DAP item (async)
|
||||
---@async
|
||||
---@param item ow.dap.Item Root item to build tree from
|
||||
---@return ow.dap.hover.Node
|
||||
function Tree:build(item)
|
||||
local root = Node.new(item, nil)
|
||||
self.root_node = root
|
||||
|
||||
-- For now, start with everything collapsed
|
||||
-- Later we can add logic to expand first level by default
|
||||
return root
|
||||
end
|
||||
|
||||
---Load children for a node (async)
|
||||
---@async
|
||||
---@param node ow.dap.hover.Node
|
||||
---@return boolean success Whether loading succeeded
|
||||
function Tree:load_children(node)
|
||||
if not node:is_container() or #node.children > 0 then
|
||||
return true -- Already loaded or not a container
|
||||
end
|
||||
|
||||
local err, resp = self.session:request("variables", {
|
||||
variablesReference = node.item.variablesReference,
|
||||
})
|
||||
|
||||
if err or not resp or #resp.variables == 0 then
|
||||
return false
|
||||
end
|
||||
|
||||
-- Create child nodes
|
||||
for i, var in ipairs(resp.variables) do
|
||||
local child_item = {
|
||||
name = var.name,
|
||||
type = var.type,
|
||||
value = var.value,
|
||||
variablesReference = var.variablesReference,
|
||||
depth = node.item.depth + 1,
|
||||
}
|
||||
|
||||
local child = Node.new(child_item, node)
|
||||
child.is_last_child = (i == #resp.variables)
|
||||
|
||||
-- Format array indices properly
|
||||
if child_item.name:match("^%d+$") then
|
||||
child_item.name = "[" .. child_item.name .. "]"
|
||||
end
|
||||
|
||||
table.insert(node.children, child)
|
||||
end
|
||||
|
||||
return true
|
||||
end
|
||||
|
||||
---Render the tree to highlighted content
|
||||
---@async
|
||||
---@return ow.dap.hover.Content
|
||||
function Tree:render()
|
||||
if not self.root_node then
|
||||
return Content.new()
|
||||
end
|
||||
|
||||
local content = Content.new()
|
||||
self.line_to_node = {}
|
||||
|
||||
self:render_node(self.root_node, content, 0)
|
||||
return content
|
||||
end
|
||||
|
||||
---Render a single node and its expanded children
|
||||
---@async
|
||||
---@param node ow.dap.hover.Node
|
||||
---@param content ow.dap.hover.Content
|
||||
---@param line_number integer Current line number
|
||||
---@return integer new_line_number Updated line number after rendering
|
||||
function Tree:render_node(node, content, line_number)
|
||||
-- Store line mapping
|
||||
node.line_number = line_number
|
||||
self.line_to_node[line_number] = node
|
||||
|
||||
-- Format this node
|
||||
local node_content = node:format(self.session)
|
||||
content.text = content.text .. node_content.text
|
||||
|
||||
-- Copy highlights, adjusting for current position
|
||||
local text_offset = #content.text - #node_content.text
|
||||
for _, highlight in ipairs(node_content.highlights) do
|
||||
table.insert(content.highlights, {
|
||||
group = highlight.group,
|
||||
start_col = highlight.start_col + text_offset,
|
||||
end_col = highlight.end_col + text_offset,
|
||||
})
|
||||
end
|
||||
|
||||
content:newline()
|
||||
line_number = line_number + 1
|
||||
|
||||
-- Render expanded children
|
||||
if node.is_expanded then
|
||||
for _, child in ipairs(node.children) do
|
||||
line_number = self:render_node(child, content, line_number)
|
||||
end
|
||||
end
|
||||
|
||||
return line_number
|
||||
end
|
||||
|
||||
---Toggle expansion state of node at given line
|
||||
---@async
|
||||
---@param line_number integer
|
||||
---@return boolean success Whether toggle succeeded
|
||||
function Tree:toggle_at_line(line_number)
|
||||
local node = self.line_to_node[line_number]
|
||||
if not node or not node:is_container() then
|
||||
return false
|
||||
end
|
||||
|
||||
if not node.is_expanded then
|
||||
-- Expanding: load children if needed
|
||||
local success = self:load_children(node)
|
||||
if not success then
|
||||
return false
|
||||
end
|
||||
end
|
||||
|
||||
-- Toggle state
|
||||
node.is_expanded = not node.is_expanded
|
||||
return true
|
||||
end
|
||||
|
||||
return Tree
|
||||
@@ -0,0 +1,43 @@
|
||||
-- DAP variable item representation
|
||||
|
||||
---@class ow.dap.Item
|
||||
---@field name string
|
||||
---@field type string
|
||||
---@field value string
|
||||
---@field variablesReference? number
|
||||
---@field depth integer
|
||||
local Item = {}
|
||||
Item.__index = Item
|
||||
|
||||
---Create a new item
|
||||
---@param name string
|
||||
---@param type string
|
||||
---@param value string
|
||||
---@param variablesReference? number
|
||||
---@param depth integer
|
||||
---@return ow.dap.Item
|
||||
function Item.new(name, type, value, variablesReference, depth)
|
||||
return setmetatable({
|
||||
name = name,
|
||||
type = type,
|
||||
value = value,
|
||||
variablesReference = variablesReference,
|
||||
depth = depth,
|
||||
}, Item)
|
||||
end
|
||||
|
||||
---Create item from DAP variable
|
||||
---@param var dap.Variable
|
||||
---@param depth integer
|
||||
---@return ow.dap.Item
|
||||
function Item.from_var(var, depth)
|
||||
return Item.new(
|
||||
var.name,
|
||||
var.type,
|
||||
var.value,
|
||||
var.variablesReference,
|
||||
depth
|
||||
)
|
||||
end
|
||||
|
||||
return Item
|
||||
Reference in New Issue
Block a user