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|
---@tag telescope.actions.utils
---@config { ["module"] = "telescope.actions.utils", ["name"] = "ACTIONS_UTILS" }
---@brief [[
--- Utilities to wrap functions around picker selections and entries.
---
--- Generally used from within other |telescope.actions|
---@brief ]]
local action_state = require "telescope.actions.state"
local utils = {}
--- Apply `f` to the entries of the current picker.
--- - Notes:
--- - Mapped entries include all currently filtered results, not just the visible ones.
--- - Indices are 1-indexed, whereas rows are 0-indexed.
--- - Warning: `map_entries` has no return value.
--- - The below example showcases how to collect results
---
--- Usage:
--- <code>
--- local action_state = require "telescope.actions.state"
--- local action_utils = require "telescope.actions.utils"
--- function entry_value_by_row()
--- local prompt_bufnr = vim.api.nvim_get_current_buf()
--- local current_picker = action_state.get_current_picker(prompt_bufnr)
--- local results = {}
--- action_utils.map_entries(prompt_bufnr, function(entry, index, row)
--- results[row] = entry.value
--- end)
--- return results
--- end
--- </code>
---@param prompt_bufnr number: The prompt bufnr
---@param f function: Function to map onto entries of picker that takes (entry, index, row) as viable arguments
function utils.map_entries(prompt_bufnr, f)
vim.validate {
f = { f, "function" },
}
local current_picker = action_state.get_current_picker(prompt_bufnr)
local index = 1
-- indices are 1-indexed, rows are 0-indexed
for entry in current_picker.manager:iter() do
local row = current_picker:get_row(index)
f(entry, index, row)
index = index + 1
end
end
--- Apply `f` to the multi selections of the current picker and return a table of mapped selections.
--- - Notes:
--- - Mapped selections may include results not visible in the results pop up.
--- - Selected entries are returned in order of their selection.
--- - Warning: `map_selections` has no return value.
--- - The below example showcases how to collect results
---
--- Usage:
--- <code>
--- local action_state = require "telescope.actions.state"
--- local action_utils = require "telescope.actions.utils"
--- function selection_by_index()
--- local prompt_bufnr = vim.api.nvim_get_current_buf()
--- local current_picker = action_state.get_current_picker(prompt_bufnr)
--- local results = {}
--- action_utils.map_selections(prompt_bufnr, function(entry, index)
--- results[index] = entry.value
--- end)
--- return results
--- end
--- </code>
---@param prompt_bufnr number: The prompt bufnr
---@param f function: Function to map onto selection of picker that takes (selection) as a viable argument
function utils.map_selections(prompt_bufnr, f)
vim.validate {
f = { f, "function" },
}
local current_picker = action_state.get_current_picker(prompt_bufnr)
for _, selection in ipairs(current_picker:get_multi_selection()) do
f(selection)
end
end
local findnth = function(str, nth)
local array = {}
for i in string.gmatch(str, "%d+") do
table.insert(array, tonumber(i))
end
return array[nth]
end
--- Utility to collect mappings of prompt buffer in array of `{mode, keybind, name}`.
---@param prompt_bufnr number: The prompt bufnr
function utils.get_registered_mappings(prompt_bufnr)
local ret = {}
for _, mode in ipairs { "n", "i" } do
local mode_mappings = vim.api.nvim_buf_get_keymap(prompt_bufnr, mode)
for _, mapping in ipairs(mode_mappings) do
-- ensure only telescope mappings
if mapping.rhs and string.find(mapping.rhs, [[require%('telescope.mappings'%).execute_keymap]]) then
local funcid = findnth(mapping.rhs, 2)
table.insert(ret, { mode = mode, keybind = mapping.lhs, func = __TelescopeKeymapStore[prompt_bufnr][funcid] })
end
end
end
return ret
end
-- Best effort to infer function names for actions.which_key
function utils._get_anon_function_name(func_ref)
local Path = require "plenary.path"
local info = debug.getinfo(func_ref)
local fname
-- if fn defined in string (ie loadstring) source is string
-- if fn defined in file, source is file name prefixed with a `@´
local path = Path:new((info.source:gsub("@", "")))
if not path:exists() then
return "<anonymous>"
end
for i, line in ipairs(path:readlines()) do
if i == info.linedefined then
fname = line
break
end
end
-- test if assignment or named function, otherwise anon
if (fname:match "=" == nil) and (fname:match "function %S+%(" == nil) then
return "<anonymous>"
else
local patterns = {
{ "function", "" }, -- remove function
{ "local", "" }, -- remove local
{ "[%s=]", "" }, -- remove whitespace and =
{ [=[%[["']]=], "" }, -- remove left-hand bracket of table assignment
{ [=[["']%]]=], "" }, -- remove right-ahnd bracket of table assignment
{ "%((.+)%)", "" }, -- remove function arguments
{ "(.+)%.", "" }, -- remove TABLE. prefix if available
}
for _, tbl in ipairs(patterns) do
fname = (fname:gsub(tbl[1], tbl[2])) -- make sure only string is returned
end
-- not sure if this can happen, catch all just in case
if fname == nil or fname == "" then
return "<anonymous>"
end
return fname
end
end
return utils
|
