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Lua

------------------------------------------------------------
-- Dynamic useragent settings --
-- Written by lokichaos based upon proxy.lua by: --
--
-- Copyright © Piotr Husiatyński <phusiatynski@gmail.com> --
------------------------------------------------------------
-- TODO
-- make per-tab widget & add hooks to update it
-- save ua in table
-- clean table for GC pruning
-- set behavior: set-current, set-all, set-new
-- Grab environment we need
local io = io
local os = os
local pairs = pairs
local ipairs = ipairs
local error = error
local string = string
local lousy = require "lousy"
local theme = theme
local unpack = unpack
local table = table
local capi = { luakit = luakit, soup = soup }
local webview = webview
local widget = widget
local window = window
local util = lousy.util
local globals = globals
-- Check for mode/bind functions
local add_binds, add_cmds = add_binds, add_cmds
local new_mode, menu_binds = new_mode, menu_binds
local setmetatable = setmetatable
module("plugin.useragent")
-- Store each webview's ua-name
local uas = {}
setmetatable(uas, { __mode = "k" })
--- Module global variables
local agents_file = capi.luakit.data_dir .. '/useragentmenu'
local useragents = {}
local realagent = { name = 0, uastring = globals.useragent }
local active = realagent
local default_name = nil
-- Return ordered list of user agent names
function get_names()
return lousy.util.table.keys(useragents)
end
-- Return ua string of user agent given by name
function get(name)
return useragents[name]
end
--- Load user agents list from file
-- @param fd_name custom user agent storage of nil to use default
function load(fd_name)
local fd_name = fd_name or agents_file
if not os.exists(fd_name) then return end
local strip = lousy.util.string.strip
for line in io.lines(fd_name) do
local status, name, uastring = string.match(line, "^(.)%s(.+)%s\"(.+)\"$")
if uastring then
name, uastring = strip(name), strip(uastring)
if status == '*' then
active = { uastring = uastring, name = name }
end
useragents[name] = uastring
end
end
-- Set saved default ua string
globals.useragent = active.uastring
default_name = active.name
end
--- Save user agents list to file
-- @param fd_name custom user agent storage of nil to use default
function save(fd_name)
local fd = io.open(fd_name or agents_file, "w")
for name, uastring in pairs(useragents) do
if uastrings ~= "" then
local status = (active.name == name and '*') or ' '
fd:write(string.format("%s %s \"%s\"\n", status, name, uastring))
end
end
io.close(fd)
end
--- Add new user agent to current list
-- @param name user agent configuration name
-- @param uastring user agent string
-- @param save_file do not save configuration if false
function set(name, uastring, save_file)
local name = lousy.util.string.strip(name)
if not string.match(name, "^([%w%p]+)$") then
error("Invalid user agent name: " .. name)
end
useragents[name] = lousy.util.string.strip(uastring)
if save_file ~= false then save() end
end
--- Delete selected user agent from list
-- @param name user agent name
-- TODO check all tabs
function del(name, w)
local name = lousy.util.string.strip(name)
if useragents[name] then
-- if deleted user agent was the active one, use real/default uastring
if name == active.name then
active = realagent
end
useragents[name] = nil
save()
end
end
--- Set given user agent to active. Return true on success, else false
-- @param name user agents configuration name or nil to unset user agent.
function set_active(name)
if name ~= 0 then
local name = lousy.util.string.strip(name)
if not useragents[name] then
error("Unknown user agent: " .. name)
end
active = { name = name, uastring = useragents[name] }
else
active = realagent
end
save()
return true
end
-- Create a user agent indicator widget and add it to the status bar
window.init_funcs.build_ua_indicator = function (w)
local r = w.sbar.r
r.uai = widget{type="label"}
r.layout:pack(r.uai)
r.layout:reorder(r.uai, 2)
r.uai.fg = theme.useragenti_sbar_fg or theme.sbar_fg
r.uai.font = theme.useragenti_sbar_font or theme.sbar_font
w.tabs:add_signal("switch-page", function (nbook, view, idx)
capi.luakit.idle_add(function() w:update_ua_indicator() return false end)
end)
w:update_ua_indicator()
end
-- Helper function to update text in user agent indicator
window.methods.update_ua_indicator = function (w)
local name = uas[w.view] or (uas[w.view] == 0 and 0) or default_name
local uai = w.sbar.r.uai
if name ~= 0 then
local text = string.format("(%s)", name)
if uai.text ~= text then uai.text = text end
uai:show()
else
uai:hide()
end
end
new_mode("uagentmenu", {
enter = function (w)
-- Set all tab's uas entires
for index = 1, w.tabs:count() do
uas[w.tabs[index]] = uas[w.tabs[index]] or default_name
end
local afg = theme.useragent_active_menu_fg or theme.proxy_active_menu_fg
local ifg = theme.useragent_inactive_menu_fg or theme.proxy_inactive_menu_fg
local abg = theme.useragent_active_menu_bg or theme.proxy_active_menu_bg
local ibg = theme.useragent_inactive_menu_bg or theme.proxy_inactive_menu_bg
-- "Active" user agent, this is the one that is saved as a default between sessions
local act_ua = uas[w.view]
-- Add titlebar, and "Default" UA entry
local dname = string.format(" %s %s%s", "Default Luakit User Agent",
(active.name == 0 and "[Default]") or "",
(default_name == 0 and "[Session]") or "")
local rows = {{ "User Agent Name", " User Agent String", title = true },
{ dname, " " .. realagent.uastring or "", name = 0, uastring = '',
fg = (act_ua == 0 and afg) or ifg,
bg = (act_ua == 0 and abg) or ibg},}
for _, name in ipairs(get_names()) do
local uastring = get(name)
local uaname = string.format(" %s %s%s", name,
(active.name == name and "[Default]") or "",
(default_name == name and "[Session]") or "")
table.insert(rows, {
uaname, " " .. uastring,
name = name, uastring = lousy.util.escape(uastring),
fg = (act_ua == name and afg) or ifg,
bg = (act_ua == name and abg) or ibg,
})
end
w.menu:build(rows)
w:notify("Use j/k to move, [d]elete, [e]dit, [a]dd, [S]et default, [s]et for all tabs, [n] set for new tabs, return to set for current tab.", false)
end,
leave = function (w)
w.menu:hide()
end,
})
local cmd = lousy.bind.cmd
add_cmds({
cmd({"agent", "ua"}, "add new or select useragent",
function (w, a)
if not a then
w:set_mode("uagentmenu")
else
local name, uastring = string.match(a, "(.+)%s\"(.+)\"")
if name and uastring then
set(name, uastring)
else
w:error("Bad usage. Correct format :agent <name> \"<agent string>\"")
end
end
end),
})
local ua_set = function(mode, ua, w)
if mode == "current" then
w.view.user_agent = ua.uastring or realagent.uastring
uas[w.view] = ua.name
if ua.name ~= 0 then
w:notify(string.format("Set user agent on this tab to: %s (%s).", ua.name, ua.uastring))
else
w:notify("Set user agent for current tab to default.")
end
elseif mode == "newtabs" then
globals.useragent = ua.uastring
default_name = ua.name
if ua.name ~= 0 then
w:notify(string.format("Set user agent for all new tabs to: %s (%s).", ua.name, ua.uastring))
else
w:notify("Set user agent for all new tabs to default Luakit.")
end
elseif mode == "all" then
-- New Tabs will use this
globals.useragent = ua.uastring
default_name = ua.name
-- Set user agent for all existing tabs
for index = 1, w.tabs:count() do
w.tabs[index].user_agent = ua.uastring
uas[w.tabs[index]] = ua.name
end
if ua.name ~= 0 then
w:notify(string.format("Set user agent for all tabs to: %s (%s).", ua.name, ua.uastring))
else
w:notify("Set user agent for all tabs to default.")
end
elseif mode == "default" then
globals.useragent = ua.uastring
default_name = ua.name
set_active(ua.name)
if ua.name ~= 0 then
w:notify(string.format("Set %s as default useragent (%s)", ua.name, ua.uastring))
else
w:notify("Unset default useragent, will default to real Luakit one.")
end
end
-- Update useragent statusbar widget
w:update_ua_indicator()
end
local key = lousy.bind.key
add_binds("uagentmenu", lousy.util.table.join({
-- Select user agent
key({}, "Return",
function (w)
local row = w.menu:get()
if row then
w:set_mode()
ua_set("current", row, w)
end
end),
key({}, "S",
function (w)
local row = w.menu:get()
if row then
w:set_mode()
ua_set("default", row, w)
end
end),
key({}, "s",
function (w)
local row = w.menu:get()
if row then
w:set_mode()
ua_set("all", row, w)
end
end),
key({}, "n",
function (w)
local row = w.menu:get()
if row then
w:set_mode()
ua_set("newtabs", row, w)
end
end),
-- Delete user agent
key({}, "d",
function (w)
local row = w.menu:get()
if row and row.name then
del(row.name)
w.menu:del()
end
end),
-- Edit user agent
key({}, "e",
function (w)
local row = w.menu:get()
if row and row.name then
w:enter_cmd(string.format(":agent %s \"%s\"", row.name, row.uastring))
end
end),
-- New user agent
key({}, "a", function (w) w:enter_cmd(":agent ") end),
-- Exit menu
key({}, "q", function (w) w:set_mode() end),
}, menu_binds))
-- Initialize module
load()
-- vim: et:sw=4:ts=8:sts=4