661 lines
24 KiB
Lua
661 lines
24 KiB
Lua
---------------------------------------------------------------------------
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--- Prompt module for awful
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--
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-- @author Julien Danjou <julien@danjou.info>
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-- @copyright 2008 Julien Danjou
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-- @release @AWESOME_VERSION@
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-- @module awful.prompt
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---------------------------------------------------------------------------
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-- Grab environment we need
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local assert = assert
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local io = io
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local table = table
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local math = math
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local ipairs = ipairs
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local pcall = pcall
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local capi =
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{
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selection = selection
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}
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local unpack = unpack or table.unpack -- luacheck: globals unpack (compatibility with Lua 5.1)
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local keygrabber = require("awful.keygrabber")
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local util = require("awful.util")
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local beautiful = require("beautiful")
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local prompt = {}
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--- Private data
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local data = {}
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data.history = {}
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local search_term = nil
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local function itera (inc,a, i)
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i = i + inc
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local v = a[i]
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if v then return i,v end
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end
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--- Load history file in history table
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-- @param id The data.history identifier which is the path to the filename.
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-- @param[opt] max The maximum number of entries in file.
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local function history_check_load(id, max)
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if id and id ~= ""
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and not data.history[id] then
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data.history[id] = { max = 50, table = {} }
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if max then
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data.history[id].max = max
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end
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local f = io.open(id, "r")
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-- Read history file
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if f then
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for line in f:lines() do
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if util.table.hasitem(data.history[id].table, line) == nil then
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table.insert(data.history[id].table, line)
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if #data.history[id].table >= data.history[id].max then
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break
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end
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end
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end
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f:close()
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end
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end
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end
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local function is_word_char(c)
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if string.find("[{[(,.:;_-+=@/ ]", c) then
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return false
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else
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return true
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end
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end
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local function cword_start(s, pos)
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local i = pos
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if i > 1 then
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i = i - 1
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end
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while i >= 1 and not is_word_char(s:sub(i, i)) do
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i = i - 1
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end
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while i >= 1 and is_word_char(s:sub(i, i)) do
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i = i - 1
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end
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if i <= #s then
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i = i + 1
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end
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return i
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end
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local function cword_end(s, pos)
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local i = pos
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while i <= #s and not is_word_char(s:sub(i, i)) do
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i = i + 1
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end
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while i <= #s and is_word_char(s:sub(i, i)) do
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i = i + 1
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end
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return i
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end
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--- Save history table in history file
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-- @param id The data.history identifier
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local function history_save(id)
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if data.history[id] then
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local f = io.open(id, "w")
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if not f then
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local i = 0
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for d in id:gmatch(".-/") do
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i = i + #d
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end
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util.mkdir(id:sub(1, i - 1))
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f = assert(io.open(id, "w"))
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end
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for i = 1, math.min(#data.history[id].table, data.history[id].max) do
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f:write(data.history[id].table[i] .. "\n")
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end
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f:close()
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end
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end
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--- Return the number of items in history table regarding the id
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-- @param id The data.history identifier
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-- @return the number of items in history table, -1 if history is disabled
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local function history_items(id)
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if data.history[id] then
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return #data.history[id].table
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else
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return -1
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end
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end
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--- Add an entry to the history file
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-- @param id The data.history identifier
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-- @param command The command to add
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local function history_add(id, command)
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if data.history[id] and command ~= "" then
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local index = util.table.hasitem(data.history[id].table, command)
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if index == nil then
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table.insert(data.history[id].table, command)
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-- Do not exceed our max_cmd
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if #data.history[id].table > data.history[id].max then
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table.remove(data.history[id].table, 1)
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end
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history_save(id)
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else
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-- Bump this command to the end of history
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table.remove(data.history[id].table, index)
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table.insert(data.history[id].table, command)
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history_save(id)
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end
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end
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end
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--- Draw the prompt text with a cursor.
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-- @tparam table args The table of arguments.
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-- @field text The text.
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-- @field font The font.
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-- @field prompt The text prefix.
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-- @field text_color The text color.
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-- @field cursor_color The cursor color.
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-- @field cursor_pos The cursor position.
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-- @field cursor_ul The cursor underline style.
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-- @field selectall If true cursor is rendered on the entire text.
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local function prompt_text_with_cursor(args)
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local char, spacer, text_start, text_end, ret
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local text = args.text or ""
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local _prompt = args.prompt or ""
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local underline = args.cursor_ul or "none"
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if args.selectall then
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if #text == 0 then char = " " else char = util.escape(text) end
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spacer = " "
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text_start = ""
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text_end = ""
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elseif #text < args.cursor_pos then
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char = " "
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spacer = ""
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text_start = util.escape(text)
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text_end = ""
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else
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char = util.escape(text:sub(args.cursor_pos, args.cursor_pos))
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spacer = " "
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text_start = util.escape(text:sub(1, args.cursor_pos - 1))
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text_end = util.escape(text:sub(args.cursor_pos + 1))
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end
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local cursor_color = util.ensure_pango_color(args.cursor_color)
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local text_color = util.ensure_pango_color(args.text_color)
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ret = _prompt .. text_start .. "<span background=\"" .. cursor_color ..
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"\" foreground=\"" .. text_color .. "\" underline=\"" .. underline ..
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"\">" .. char .. "</span>" .. text_end .. spacer
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return ret
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end
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--- Run a prompt in a box.
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--
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-- The following readline keyboard shortcuts are implemented as expected:
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-- <kbd>CTRL+A</kbd>, <kbd>CTRL+B</kbd>, <kbd>CTRL+C</kbd>, <kbd>CTRL+D</kbd>,
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-- <kbd>CTRL+E</kbd>, <kbd>CTRL+J</kbd>, <kbd>CTRL+M</kbd>, <kbd>CTRL+F</kbd>,
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-- <kbd>CTRL+H</kbd>, <kbd>CTRL+K</kbd>, <kbd>CTRL+U</kbd>, <kbd>CTRL+W</kbd>,
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-- <kbd>CTRL+BACKSPACE</kbd>, <kbd>SHIFT+INSERT</kbd>, <kbd>HOME</kbd>,
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-- <kbd>END</kbd> and arrow keys.
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--
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-- The following shortcuts implement additional history manipulation commands
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-- where the search term is defined as the substring of the command from first
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-- character to cursor position.
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--
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-- * <kbd>CTRL+R</kbd>: reverse history search, matches any history entry
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-- containing search term.
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-- * <kbd>CTRL+S</kbd>: forward history search, matches any history entry
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-- containing search term.
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-- * <kbd>CTRL+UP</kbd>: ZSH up line or search, matches any history entry
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-- starting with search term.
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-- * <kbd>CTRL+DOWN</kbd>: ZSH down line or search, matches any history
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-- entry starting with search term.
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-- * <kbd>CTRL+DELETE</kbd>: delete the currently visible history entry from
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-- history file. This does not delete new commands or history entries under
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-- user editing.
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--
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-- @tparam table args A table with optional arguments: `fg_cursor`, `bg_cursor`,
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-- `ul_cursor`, `prompt`, `text`, `selectall`, `font`, `autoexec`, `hooks`.
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-- @tparam[opt] table args.hooks The "hooks" argument uses a syntax similar to
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-- `awful.key`. It will call a function for the matching modifiers + key.
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-- It receives the command (widget text/input) as an argument.
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-- If the callback returns a command, this will be passed to the
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-- `exe_callback`, otherwise nothing gets executed by default, and the hook
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-- needs to handle it.
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-- hooks = {
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-- -- Apply startup notification properties with Shift-Return.
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-- {{"Shift" }, "Return", function(command)
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-- mypromptbox[awful.screen.focused()]:spawn_and_handle_error(
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-- command, {floating=true})
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-- end},
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-- -- Override default behavior of "Return": launch commands prefixed
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-- -- with ":" in a terminal.
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-- {{}, "Return", function(command)
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-- if command:sub(1,1) == ":" then
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-- return terminal .. ' -e ' .. command:sub(2)
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-- end
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-- return command
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-- end}
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-- }
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-- @param textbox The textbox to use for the prompt.
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-- @param exe_callback The callback function to call with command as argument
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-- when finished.
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-- @param completion_callback The callback function to call to get completion.
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-- @param[opt] history_path File path where the history should be
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-- saved, set nil to disable history
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-- @param[opt] history_max Set the maximum entries in history
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-- file, 50 by default
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-- @param[opt] done_callback The callback function to always call
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-- without arguments, regardless of whether the prompt was cancelled.
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-- @param[opt] changed_callback The callback function to call
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-- with command as argument when a command was changed.
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-- @param[opt] keypressed_callback The callback function to call
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-- with mod table, key and command as arguments when a key was pressed.
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function prompt.run(args, textbox, exe_callback, completion_callback, history_path, history_max, done_callback, changed_callback, keypressed_callback)
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local grabber
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local theme = beautiful.get()
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if not args then args = {} end
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local command = args.text or ""
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local command_before_comp
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local cur_pos_before_comp
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local prettyprompt = args.prompt or ""
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local inv_col = args.fg_cursor or theme.fg_focus or "black"
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local cur_col = args.bg_cursor or theme.bg_focus or "white"
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local cur_ul = args.ul_cursor
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local text = args.text or ""
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local font = args.font or theme.font
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local selectall = args.selectall
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local hooks = {}
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search_term=nil
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history_check_load(history_path, history_max)
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local history_index = history_items(history_path) + 1
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-- The cursor position
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local cur_pos = (selectall and 1) or text:wlen() + 1
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-- The completion element to use on completion request.
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local ncomp = 1
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if not textbox or not (exe_callback or args.hooks) then
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return
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end
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-- Build the hook map
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for _,v in ipairs(args.hooks or {}) do
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if #v == 3 then
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local _,key,callback = unpack(v)
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if type(callback) == "function" then
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hooks[key] = hooks[key] or {}
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hooks[key][#hooks[key]+1] = v
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else
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assert("The hook's 3rd parameter has to be a function.")
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end
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else
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assert("The hook has to have 3 parameters.")
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end
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end
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textbox:set_font(font)
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textbox:set_markup(prompt_text_with_cursor{
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text = text, text_color = inv_col, cursor_color = cur_col,
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cursor_pos = cur_pos, cursor_ul = cur_ul, selectall = selectall,
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prompt = prettyprompt })
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local function exec(cb)
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textbox:set_markup("")
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history_add(history_path, command)
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keygrabber.stop(grabber)
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cb(command)
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if done_callback then done_callback() end
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end
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-- Update textbox
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local function update()
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textbox:set_font(font)
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textbox:set_markup(prompt_text_with_cursor{
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text = command, text_color = inv_col, cursor_color = cur_col,
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cursor_pos = cur_pos, cursor_ul = cur_ul, selectall = selectall,
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prompt = prettyprompt })
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end
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grabber = keygrabber.run(
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function (modifiers, key, event)
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if event ~= "press" then return end
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-- Convert index array to hash table
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local mod = {}
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for _, v in ipairs(modifiers) do mod[v] = true end
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-- Call the user specified callback. If it returns true as
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-- the first result then return from the function. Treat the
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-- second and third results as a new command and new prompt
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-- to be set (if provided)
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if keypressed_callback then
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local user_catched, new_command, new_prompt =
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keypressed_callback(mod, key, command)
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if new_command or new_prompt then
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if new_command then
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command = new_command
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end
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if new_prompt then
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prettyprompt = new_prompt
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end
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update()
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end
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if user_catched then
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if changed_callback then
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changed_callback(command)
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end
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return
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end
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end
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-- User defined cases
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if hooks[key] then
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for _,v in ipairs(hooks[key]) do
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if #modifiers == #v[1] then
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local match = true
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for _,v2 in ipairs(v[1]) do
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match = match and mod[v2]
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end
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if match or #modifiers == 0 then
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local cb
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local ret = v[3](command)
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if ret then
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command = ret
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cb = exe_callback
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else
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-- No callback.
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cb = function() end
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end
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exec(cb)
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return
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end
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end
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end
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end
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-- Get out cases
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if (mod.Control and (key == "c" or key == "g"))
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or (not mod.Control and key == "Escape") then
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keygrabber.stop(grabber)
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textbox:set_markup("")
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history_save(history_path)
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if done_callback then done_callback() end
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return false
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elseif (mod.Control and (key == "j" or key == "m"))
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or (not mod.Control and key == "Return")
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or (not mod.Control and key == "KP_Enter") then
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exec(exe_callback)
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-- We already unregistered ourselves so we don't want to return
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-- true, otherwise we may unregister someone else.
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return
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end
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-- Control cases
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if mod.Control then
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selectall = nil
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if key == "a" then
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cur_pos = 1
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elseif key == "b" then
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if cur_pos > 1 then
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cur_pos = cur_pos - 1
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end
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elseif key == "d" then
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if cur_pos <= #command then
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command = command:sub(1, cur_pos - 1) .. command:sub(cur_pos + 1)
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end
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elseif key == "p" then
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if history_index > 1 then
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history_index = history_index - 1
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command = data.history[history_path].table[history_index]
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cur_pos = #command + 2
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end
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elseif key == "n" then
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if history_index < history_items(history_path) then
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history_index = history_index + 1
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command = data.history[history_path].table[history_index]
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cur_pos = #command + 2
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elseif history_index == history_items(history_path) then
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history_index = history_index + 1
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command = ""
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cur_pos = 1
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end
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elseif key == "e" then
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cur_pos = #command + 1
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elseif key == "r" then
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search_term = search_term or command:sub(1, cur_pos - 1)
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for i,v in (function(a,i) return itera(-1,a,i) end), data.history[history_path].table, history_index do
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if v:find(search_term,1,true) ~= nil then
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command=v
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history_index=i
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cur_pos=#command+1
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break
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end
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end
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elseif key == "s" then
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search_term = search_term or command:sub(1, cur_pos - 1)
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for i,v in (function(a,i) return itera(1,a,i) end), data.history[history_path].table, history_index do
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if v:find(search_term,1,true) ~= nil then
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command=v
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history_index=i
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cur_pos=#command+1
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break
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end
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end
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elseif key == "f" then
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if cur_pos <= #command then
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cur_pos = cur_pos + 1
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end
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elseif key == "h" then
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if cur_pos > 1 then
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command = command:sub(1, cur_pos - 2) .. command:sub(cur_pos)
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cur_pos = cur_pos - 1
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end
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elseif key == "k" then
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command = command:sub(1, cur_pos - 1)
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elseif key == "u" then
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command = command:sub(cur_pos, #command)
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cur_pos = 1
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elseif key == "Up" then
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search_term = command:sub(1, cur_pos - 1) or ""
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for i,v in (function(a,i) return itera(-1,a,i) end), data.history[history_path].table, history_index do
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if v:find(search_term,1,true) == 1 then
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command=v
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history_index=i
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break
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end
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end
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elseif key == "Down" then
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search_term = command:sub(1, cur_pos - 1) or ""
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for i,v in (function(a,i) return itera(1,a,i) end), data.history[history_path].table, history_index do
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if v:find(search_term,1,true) == 1 then
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command=v
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history_index=i
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break
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end
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end
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elseif key == "w" or key == "BackSpace" then
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local wstart = 1
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local wend = 1
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local cword_start_pos = 1
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local cword_end_pos = 1
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while wend < cur_pos do
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wend = command:find("[{[(,.:;_-+=@/ ]", wstart)
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if not wend then wend = #command + 1 end
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if cur_pos >= wstart and cur_pos <= wend + 1 then
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cword_start_pos = wstart
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cword_end_pos = cur_pos - 1
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break
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end
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wstart = wend + 1
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end
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command = command:sub(1, cword_start_pos - 1) .. command:sub(cword_end_pos + 1)
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cur_pos = cword_start_pos
|
|
elseif key == "Delete" then
|
|
-- delete from history only if:
|
|
-- we are not dealing with a new command
|
|
-- the user has not edited an existing entry
|
|
if command == data.history[history_path].table[history_index] then
|
|
table.remove(data.history[history_path].table, history_index)
|
|
if history_index <= history_items(history_path) then
|
|
command = data.history[history_path].table[history_index]
|
|
cur_pos = #command + 2
|
|
elseif history_index > 1 then
|
|
history_index = history_index - 1
|
|
|
|
command = data.history[history_path].table[history_index]
|
|
cur_pos = #command + 2
|
|
else
|
|
command = ""
|
|
cur_pos = 1
|
|
end
|
|
end
|
|
end
|
|
elseif mod.Mod1 or mod.Mod3 then
|
|
if key == "b" then
|
|
cur_pos = cword_start(command, cur_pos)
|
|
elseif key == "f" then
|
|
cur_pos = cword_end(command, cur_pos)
|
|
elseif key == "d" then
|
|
command = command:sub(1, cur_pos - 1) .. command:sub(cword_end(command, cur_pos))
|
|
elseif key == "BackSpace" then
|
|
local wstart = cword_start(command, cur_pos)
|
|
command = command:sub(1, wstart - 1) .. command:sub(cur_pos)
|
|
cur_pos = wstart
|
|
end
|
|
else
|
|
if completion_callback then
|
|
if key == "Tab" or key == "ISO_Left_Tab" then
|
|
if key == "ISO_Left_Tab" then
|
|
if ncomp == 1 then return end
|
|
if ncomp == 2 then
|
|
command = command_before_comp
|
|
textbox:set_font(font)
|
|
textbox:set_markup(prompt_text_with_cursor{
|
|
text = command_before_comp, text_color = inv_col, cursor_color = cur_col,
|
|
cursor_pos = cur_pos, cursor_ul = cur_ul, selectall = selectall,
|
|
prompt = prettyprompt })
|
|
return
|
|
end
|
|
|
|
ncomp = ncomp - 2
|
|
elseif ncomp == 1 then
|
|
command_before_comp = command
|
|
cur_pos_before_comp = cur_pos
|
|
end
|
|
local matches
|
|
command, cur_pos, matches = completion_callback(command_before_comp, cur_pos_before_comp, ncomp)
|
|
ncomp = ncomp + 1
|
|
key = ""
|
|
-- execute if only one match found and autoexec flag set
|
|
if matches and #matches == 1 and args.autoexec then
|
|
exec(exe_callback)
|
|
return
|
|
end
|
|
else
|
|
ncomp = 1
|
|
end
|
|
end
|
|
|
|
-- Typin cases
|
|
if mod.Shift and key == "Insert" then
|
|
local selection = capi.selection()
|
|
if selection then
|
|
-- Remove \n
|
|
local n = selection:find("\n")
|
|
if n then
|
|
selection = selection:sub(1, n - 1)
|
|
end
|
|
command = command:sub(1, cur_pos - 1) .. selection .. command:sub(cur_pos)
|
|
cur_pos = cur_pos + #selection
|
|
end
|
|
elseif key == "Home" then
|
|
cur_pos = 1
|
|
elseif key == "End" then
|
|
cur_pos = #command + 1
|
|
elseif key == "BackSpace" then
|
|
if cur_pos > 1 then
|
|
command = command:sub(1, cur_pos - 2) .. command:sub(cur_pos)
|
|
cur_pos = cur_pos - 1
|
|
end
|
|
elseif key == "Delete" then
|
|
command = command:sub(1, cur_pos - 1) .. command:sub(cur_pos + 1)
|
|
elseif key == "Left" then
|
|
cur_pos = cur_pos - 1
|
|
elseif key == "Right" then
|
|
cur_pos = cur_pos + 1
|
|
elseif key == "Up" then
|
|
if history_index > 1 then
|
|
history_index = history_index - 1
|
|
|
|
command = data.history[history_path].table[history_index]
|
|
cur_pos = #command + 2
|
|
end
|
|
elseif key == "Down" then
|
|
if history_index < history_items(history_path) then
|
|
history_index = history_index + 1
|
|
|
|
command = data.history[history_path].table[history_index]
|
|
cur_pos = #command + 2
|
|
elseif history_index == history_items(history_path) then
|
|
history_index = history_index + 1
|
|
|
|
command = ""
|
|
cur_pos = 1
|
|
end
|
|
else
|
|
-- wlen() is UTF-8 aware but #key is not,
|
|
-- so check that we have one UTF-8 char but advance the cursor of # position
|
|
if key:wlen() == 1 then
|
|
if selectall then command = "" end
|
|
command = command:sub(1, cur_pos - 1) .. key .. command:sub(cur_pos)
|
|
cur_pos = cur_pos + #key
|
|
end
|
|
end
|
|
if cur_pos < 1 then
|
|
cur_pos = 1
|
|
elseif cur_pos > #command + 1 then
|
|
cur_pos = #command + 1
|
|
end
|
|
selectall = nil
|
|
end
|
|
|
|
local success = pcall(update)
|
|
while not success do
|
|
-- TODO UGLY HACK TODO
|
|
-- Setting the text failed. Most likely reason is that the user
|
|
-- entered a multibyte character and pressed backspace which only
|
|
-- removed the last byte. Let's remove another byte.
|
|
if cur_pos <= 1 then
|
|
-- No text left?!
|
|
break
|
|
end
|
|
|
|
command = command:sub(1, cur_pos - 2) .. command:sub(cur_pos)
|
|
cur_pos = cur_pos - 1
|
|
success = pcall(update)
|
|
end
|
|
|
|
if changed_callback then
|
|
changed_callback(command)
|
|
end
|
|
end)
|
|
end
|
|
|
|
return prompt
|
|
|
|
-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
|