Files
nvim/lua/ow/dap/hover.lua
T
2025-09-27 00:45:44 +02:00

153 lines
3.8 KiB
Lua

local Item = require("ow.dap.item")
local Tree = require("ow.dap.hover.tree")
local Window = require("ow.dap.hover.window")
local log = require("ow.log")
---@async
---@param expr string
---@param session dap.Session
---@param frame_id number
---@param line_nr integer
---@param col_nr integer
---@param current_file string
local function hover_eval(
expr,
session,
frame_id,
line_nr,
col_nr,
current_file
)
local win = Window.get_instance()
win:close()
local eval_request = {
expression = expr,
frameId = frame_id,
context = "hover",
line = line_nr,
column = col_nr,
source = {
path = current_file,
},
}
local err, resp = session:request("evaluate", eval_request)
if err or not resp then
log.warning("Failed to evaluate '%s': %s", expr, err)
return
end
local item =
Item.new(expr, resp.type, resp.result, resp.variablesReference, 0)
local tree = Tree.new(session)
tree:build(item)
local content = tree:render()
local lines = content:get_lines()
win.tree = tree
win:show(lines, content)
end
---@async
local function hover_async()
local win = Window.get_instance()
if win.winid and vim.api.nvim_win_is_valid(win.winid) then
vim.api.nvim_set_current_win(win.winid)
return
end
local dap = require("dap")
local session = dap.session()
if not session then
return
end
local capabilities = session.capabilities or {}
local supports_hover = capabilities.supportsEvaluateForHovers
if not supports_hover then
log.warning("Hover is not supported by this adapter")
return
end
local cursor_pos = vim.api.nvim_win_get_cursor(0)
local line_nr = cursor_pos[1] -- nvim-dap sets linesStartAt1=true
local col_nr = cursor_pos[2] + 1 -- nvim-dap sets columnsStartAt1=true
local current_file = vim.api.nvim_buf_get_name(0)
local expr
local mode = vim.api.nvim_get_mode()
if mode.mode == "v" then
local start_pos = vim.fn.getpos("v")
local end_pos = vim.fn.getpos(".")
local start_row, start_col = start_pos[2], start_pos[3]
local end_row, end_col = end_pos[2], end_pos[3]
if start_row == end_row and end_col < start_col then
start_col, end_col = end_col, start_col
elseif end_row < start_row then
start_row, end_row = end_row, start_row
start_col, end_col = end_col, start_col
end
local lines = vim.api.nvim_buf_get_text(
0,
start_row - 1,
start_col - 1,
end_row - 1,
end_col,
{}
)
expr = table.concat(lines, "\n")
vim.api.nvim_feedkeys(
vim.api.nvim_replace_termcodes("<ESC>", true, false, true),
"n",
false
)
else
expr = vim.fn.expand("<cexpr>")
end
if expr == "" then
return
end
local thread_id
do
local err, resp = session:request("threads", nil)
if err or not resp or #resp.threads == 0 then
log.warning("Failed to get threads: %s", err)
return
end
thread_id = resp.threads[1].id
end
local frame_id
do
local err, resp =
session:request("stackTrace", { threadId = thread_id })
if err or not resp or #resp.stackFrames == 0 then
log.warning("Failed to get stack trace: %s", err)
return
end
frame_id = resp.stackFrames[1].id
end
hover_eval(expr, session, frame_id, line_nr, col_nr, current_file)
end
local function hover()
coroutine.wrap(function()
local ok, err = xpcall(hover_async, debug.traceback)
if not ok then
log.error("Hover failed:\n%s", err)
end
end)()
end
return hover