/usr/share/luakit/lib/downloads.lua is in luakit 2012.09.13-r1-8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- Downloads for luakit --
-- © 2010-2012 Mason Larobina <mason.larobina@gmail.com> --
-- © 2010 Fabian Streitel <karottenreibe@gmail.com> --
-----------------------------------------------------------
-- Grab environment we need from the standard lib
local assert = assert
local ipairs = ipairs
local os = os
local pairs = pairs
local setmetatable = setmetatable
local string = string
local table = table
local type = type
local tostring = tostring
local print = print
-- Grab environment from luakit libs
local lousy = require("lousy")
local webview = webview
local window = window
local add_cmds = add_cmds
local add_binds = add_binds
local capi = {
download = download,
timer = timer,
luakit = luakit,
widget = widget,
xdg = xdg
}
module("downloads")
-- Unique ids for downloads in this luakit instance
local id_count = 0
local function next_download_id()
id_count = id_count + 1
return tostring(id_count)
end
-- Default download directory
default_dir = capi.xdg.download_dir or (os.getenv("HOME") .. "/downloads")
-- Setup signals on download module
lousy.signal.setup(_M, true)
-- Private data for the download instances (speed tracking)
local downloads = {}
function get_all()
return lousy.util.table.clone(downloads)
end
-- Get download object from id (passthrough if already given download object)
function to_download(id)
if type(id) == "download" then return id end
for d, data in pairs(downloads) do
if id == data.id then return d end
end
end
function get(id)
local d = assert(to_download(id),
"download.get() expected valid download object or id")
return d, downloads[d]
end
local function is_running(d)
local status = d.status
return status == "created" or status == "started"
end
function do_open(d, w)
if _M.emit_signal("open-file", d.destination, d.mime_type, w) ~= true then
if w then
w:error(string.format("Couldn't open: %q (%s)", d.destination,
d.mime_type))
end
end
end
local status_timer = capi.timer{interval=1000}
status_timer:add_signal("timeout", function ()
local running = 0
for d, data in pairs(downloads) do
-- Create list of running downloads
if is_running(d) then running = running + 1 end
-- Raise "download::status" signals
local status = d.status
if status ~= data.last_status then
data.last_status = status
_M.emit_signal("download::status", d, data)
-- Open download
if status == "finished" and data.opening then
do_open(d)
end
end
end
-- Stop the status_timer after all downloads finished
if running == 0 then status_timer:stop() end
-- Update window download status widget
for _, w in pairs(window.bywidget) do
w.sbar.r.downloads.text = (running == 0 and "") or running.."↓"
end
_M.emit_signal("status-tick", running)
end)
function add(uri, opts)
opts = opts or {}
local d = (type(uri) == "string" and capi.download{uri=uri}) or uri
assert(type(d) == "download",
string.format("download.add() expected uri or download object "
.. "(got %s)", type(d) or "nil"))
-- Emit signal to get initial download location
local fn = _M.emit_signal("download-location", d.uri,
d.suggested_filename, d.mime_type)
assert(fn == nil or type(fn) == "string" and #fn > 1,
string.format("invalid filename: %q", tostring(file)))
-- Ask the user where we should download the file to
if not fn then
fn = capi.luakit.save_file("Save file", opts.window, default_dir,
d.suggested_filename)
end
if fn then
d.destination = fn
d:start()
local data = {
created = capi.luakit.time(),
id = next_download_id(),
}
downloads[d] = data
if not status_timer.started then status_timer:start() end
_M.emit_signal("download::status", d, downloads[d])
return true
end
end
function cancel(id)
local d = assert(to_download(id),
"download.cancel() expected valid download object or id")
d:cancel()
_M.emit_signal("download::status", d, downloads[d])
end
function remove(id)
local d = assert(to_download(id),
"download.remove() expected valid download object or id")
if is_running(d) then cancel(d) end
_M.emit_signal("removed-download", d, downloads[d])
downloads[d] = nil
end
function restart(id)
local d = assert(to_download(id),
"download.restart() expected valid download object or id")
local new_d = add(d.uri) -- TODO use soup message from old download
if new_d then remove(d) end
return new_d
end
function open(id, w)
local d = assert(to_download(id),
"download.open() expected valid download object or id")
local data = assert(downloads[d], "download removed")
if d.status == "finished" then
data.opening = false
do_open(d, w)
else
-- Set open flag to open file when download finishes
data.opening = true
end
end
-- Clear all finished, cancelled or aborted downloads
function clear()
for d, _ in pairs(downloads) do
if not is_running(d) then
downloads[d] = nil
end
end
_M.emit_signal("cleared-downloads")
end
-- Catch "download-request" webview widget signals
webview.init_funcs.download_request = function (view, w)
view:add_signal("download-request", function (v, d)
add(d, { window = w.win })
return true
end)
end
window.init_funcs.download_status = function (w)
local r = w.sbar.r
r.downloads = capi.widget{type="label"}
r.layout:pack(r.downloads)
r.layout:reorder(r.downloads, 1)
-- Apply theme
local theme = lousy.theme.get()
r.downloads.fg = theme.downloads_sbar_fg
r.downloads.font = theme.downloads_sbar_font
end
-- Prevent luakit from soft-closing if there are downloads still running
capi.luakit.add_signal("can-close", function ()
local count = 0
for d, _ in pairs(downloads) do
if is_running(d) then
count = count + 1
end
end
if count > 0 then
return count .. " download(s) still running"
end
end)
-- Download normal mode binds.
local key = lousy.bind.key
add_binds("normal", {
key({"Control"}, "D",
"Generate `:download` command with current URI.",
function (w)
w:enter_cmd(":download " .. (w.view.uri or "http://"))
end),
})
-- Download commands
local cmd = lousy.bind.cmd
add_cmds({
cmd("down[load]", "Download the given URI.", function (w, a)
add(a, { window = w.win })
end),
})
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