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awesome/lib/awful/menu.lua

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--------------------------------------------------------------------------------
--- A menu for awful
--
-- @author Damien Leone <damien.leone@gmail.com>
-- @author Julien Danjou <julien@danjou.info>
-- @author dodo
-- @copyright 2008, 2011 Damien Leone, Julien Danjou, dodo
-- @release @AWESOME_VERSION@
-- @module awful.menu
--------------------------------------------------------------------------------
local wibox = require("wibox")
local button = require("awful.button")
local util = require("awful.util")
local spawn = require("awful.spawn")
local tags = require("awful.tag")
local keygrabber = require("awful.keygrabber")
local client_iterate = require("awful.client").iterate
local beautiful = require("beautiful")
local dpi = require("beautiful").xresources.apply_dpi
local object = require("gears.object")
local surface = require("gears.surface")
local cairo = require("lgi").cairo
local setmetatable = setmetatable
local tonumber = tonumber
local string = string
local ipairs = ipairs
local pairs = pairs
local pcall = pcall
local print = print
local table = table
local type = type
local math = math
local capi = {
screen = screen,
mouse = mouse,
client = client }
local screen = require("awful.screen")
local menu = { mt = {} }
local table_update = function (t, set)
for k, v in pairs(set) do
t[k] = v
end
return t
end
--- Key bindings for menu navigation.
-- Keys are: up, down, exec, enter, back, close. Value are table with a list of valid
-- keys for the action, i.e. menu_keys.up = { "j", "k" } will bind 'j' and 'k'
-- key to up action. This is common to all created menu.
-- @class table
-- @name menu_keys
menu.menu_keys = { up = { "Up", "k" },
down = { "Down", "j" },
back = { "Left", "h" },
exec = { "Return" },
enter = { "Right", "l" },
close = { "Escape" } }
local function load_theme(a, b)
a = a or {}
b = b or {}
local ret = {}
local fallback = beautiful.get()
if a.reset then b = fallback end
if a == "reset" then a = fallback end
ret.border = a.border_color or b.menu_border_color or b.border_normal or
fallback.menu_border_color or fallback.border_normal
ret.border_width= a.border_width or b.menu_border_width or b.border_width or
fallback.menu_border_width or fallback.border_width or 0
ret.fg_focus = a.fg_focus or b.menu_fg_focus or b.fg_focus or
fallback.menu_fg_focus or fallback.fg_focus
ret.bg_focus = a.bg_focus or b.menu_bg_focus or b.bg_focus or
fallback.menu_bg_focus or fallback.bg_focus
ret.fg_normal = a.fg_normal or b.menu_fg_normal or b.fg_normal or
fallback.menu_fg_normal or fallback.fg_normal
ret.bg_normal = a.bg_normal or b.menu_bg_normal or b.bg_normal or
fallback.menu_bg_normal or fallback.bg_normal
ret.submenu_icon= a.submenu_icon or b.menu_submenu_icon or b.submenu_icon or
fallback.menu_submenu_icon or fallback.submenu_icon
ret.submenu = a.submenu or b.menu_submenu or b.submenu or
fallback.menu_submenu or fallback.submenu or "▶"
ret.height = a.height or b.menu_height or b.height or
fallback.menu_height or 16
ret.width = a.width or b.menu_width or b.width or
fallback.menu_width or 100
ret.font = a.font or b.font or fallback.font
for _, prop in ipairs({"width", "height", "menu_width"}) do
if type(ret[prop]) ~= "number" then ret[prop] = tonumber(ret[prop]) end
end
return ret
end
local function item_position(_menu, child)
local a, b = "height", "width"
local dir = _menu.layout.dir or "y"
if dir == "x" then a, b = b, a end
local in_dir, other = 0, _menu[b]
local num = util.table.hasitem(_menu.child, child)
if num then
for i = 0, num - 1 do
local item = _menu.items[i]
if item then
other = math.max(other, item[b])
in_dir = in_dir + item[a]
end
end
end
local w, h = other, in_dir
if dir == "x" then w, h = h, w end
return w, h
end
local function set_coords(_menu, screen_idx, m_coords)
local s_geometry = capi.screen[screen_idx].workarea
local screen_w = s_geometry.x + s_geometry.width
local screen_h = s_geometry.y + s_geometry.height
_menu.width = _menu.wibox.width
_menu.height = _menu.wibox.height
_menu.x = _menu.wibox.x
_menu.y = _menu.wibox.y
if _menu.parent then
local w, h = item_position(_menu.parent, _menu)
w = w + _menu.parent.theme.border_width
_menu.y = _menu.parent.y + h + _menu.height > screen_h and
screen_h - _menu.height or _menu.parent.y + h
_menu.x = _menu.parent.x + w + _menu.width > screen_w and
_menu.parent.x - _menu.width or _menu.parent.x + w
else
if m_coords == nil then
m_coords = capi.mouse.coords()
m_coords.x = m_coords.x + 1
m_coords.y = m_coords.y + 1
end
_menu.y = m_coords.y < s_geometry.y and s_geometry.y or m_coords.y
_menu.x = m_coords.x < s_geometry.x and s_geometry.x or m_coords.x
_menu.y = _menu.y + _menu.height > screen_h and
screen_h - _menu.height or _menu.y
_menu.x = _menu.x + _menu.width > screen_w and
screen_w - _menu.width or _menu.x
end
_menu.wibox.x = _menu.x
_menu.wibox.y = _menu.y
end
local function set_size(_menu)
local in_dir, other, a, b = 0, 0, "height", "width"
local dir = _menu.layout.dir or "y"
if dir == "x" then a, b = b, a end
for _, item in ipairs(_menu.items) do
other = math.max(other, item[b])
in_dir = in_dir + item[a]
end
_menu[a], _menu[b] = in_dir, other
if in_dir > 0 and other > 0 then
_menu.wibox[a] = in_dir
_menu.wibox[b] = other
return true
end
return false
end
local function check_access_key(_menu, key)
for i, item in ipairs(_menu.items) do
if item.akey == key then
_menu:item_enter(i)
_menu:exec(i, { exec = true })
return
end
end
if _menu.parent then
check_access_key(_menu.parent, key)
end
end
local function grabber(_menu, _, key, event)
if event ~= "press" then return end
local sel = _menu.sel or 0
if util.table.hasitem(menu.menu_keys.up, key) then
local sel_new = sel-1 < 1 and #_menu.items or sel-1
_menu:item_enter(sel_new)
elseif util.table.hasitem(menu.menu_keys.down, key) then
local sel_new = sel+1 > #_menu.items and 1 or sel+1
_menu:item_enter(sel_new)
elseif sel > 0 and util.table.hasitem(menu.menu_keys.enter, key) then
_menu:exec(sel)
elseif sel > 0 and util.table.hasitem(menu.menu_keys.exec, key) then
_menu:exec(sel, { exec = true })
elseif util.table.hasitem(menu.menu_keys.back, key) then
_menu:hide()
elseif util.table.hasitem(menu.menu_keys.close, key) then
menu.get_root(_menu):hide()
else
check_access_key(_menu, key)
end
end
function menu:exec(num, opts)
opts = opts or {}
local item = self.items[num]
if not item then return end
local cmd = item.cmd
if type(cmd) == "table" then
local action = cmd.cmd
if #cmd == 0 then
if opts.exec and action and type(action) == "function" then
action()
end
return
end
if not self.child[num] then
self.child[num] = menu.new(cmd, self)
end
local can_invoke_action = opts.exec and
action and type(action) == "function" and
(not opts.mouse or (opts.mouse and (self.auto_expand or
(self.active_child == self.child[num] and
self.active_child.wibox.visible))))
if can_invoke_action then
local visible = action(self.child[num], item)
if not visible then
menu.get_root(self):hide()
return
else
self.child[num]:update()
end
end
if self.active_child and self.active_child ~= self.child[num] then
self.active_child:hide()
end
self.active_child = self.child[num]
if not self.active_child.visible then
self.active_child:show()
end
elseif type(cmd) == "string" then
menu.get_root(self):hide()
spawn(cmd)
elseif type(cmd) == "function" then
local visible, action = cmd(item, self)
if not visible then
menu.get_root(self):hide()
else
self:update()
if self.items[num] then
self:item_enter(num, opts)
end
end
if action and type(action) == "function" then
action()
end
end
end
function menu:item_enter(num, opts)
opts = opts or {}
local item = self.items[num]
if num == nil or self.sel == num or not item then
return
elseif self.sel then
self:item_leave(self.sel)
end
--print("sel", num, menu.sel, item.theme.bg_focus)
item._background:set_fg(item.theme.fg_focus)
item._background:set_bg(item.theme.bg_focus)
self.sel = num
if self.auto_expand and opts.hover then
if self.active_child then
self.active_child:hide()
self.active_child = nil
end
if type(item.cmd) == "table" then
self:exec(num, opts)
end
end
end
function menu:item_leave(num)
--print("leave", num)
local item = self.items[num]
if item then
item._background:set_fg(item.theme.fg_normal)
item._background:set_bg(item.theme.bg_normal)
end
end
--- Show a menu.
-- @param args The arguments
-- @param args.coords Menu position defaulting to mouse.coords()
function menu:show(args)
args = args or {}
local coords = args.coords or nil
local screen_index = screen.focused()
if not set_size(self) then return end
set_coords(self, screen_index, coords)
keygrabber.run(self._keygrabber)
self.wibox.visible = true
end
--- Hide a menu popup.
function menu:hide()
-- Remove items from screen
for i = 1, #self.items do
self:item_leave(i)
end
if self.active_child then
self.active_child:hide()
self.active_child = nil
end
self.sel = nil
keygrabber.stop(self._keygrabber)
self.wibox.visible = false
end
--- Toggle menu visibility.
-- @param args The arguments
-- @param args.coords Menu position {x,y}
function menu:toggle(args)
if self.wibox.visible then
self:hide()
else
self:show(args)
end
end
--- Update menu content
function menu:update()
if self.wibox.visible then
self:show({ coords = { x = self.x, y = self.y } })
end
end
--- Get the elder parent so for example when you kill
-- it, it will destroy the whole family.
function menu:get_root()
return self.parent and menu.get_root(self.parent) or self
end
--- Add a new menu entry.
-- args.* params needed for the menu entry constructor.
-- @param args The item params
-- @param args.new (Default: awful.menu.entry) The menu entry constructor.
-- @param[opt] args.theme The menu entry theme.
-- @param[opt] index The index where the new entry will inserted.
function menu:add(args, index)
if not args then return end
local theme = load_theme(args.theme or {}, self.theme)
args.theme = theme
args.new = args.new or menu.entry
local success, item = pcall(args.new, self, args)
if not success then
print("Error while creating menu entry: " .. item)
return
end
if not item.widget then
print("Error while checking menu entry: no property widget found.")
return
end
item.parent = self
item.theme = item.theme or theme
item.width = item.width or theme.width
item.height = item.height or theme.height
wibox.widget.base.check_widget(item.widget)
item._background = wibox.widget.background()
item._background:set_widget(item.widget)
item._background:set_fg(item.theme.fg_normal)
item._background:set_bg(item.theme.bg_normal)
-- Create bindings
item._background:buttons(util.table.join(
button({}, 3, function () self:hide() end),
button({}, 1, function ()
local num = util.table.hasitem(self.items, item)
self:item_enter(num, { mouse = true })
self:exec(num, { exec = true, mouse = true })
end )))
item._mouse = function ()
local num = util.table.hasitem(self.items, item)
self:item_enter(num, { hover = true, moue = true })
end
item.widget:connect_signal("mouse::enter", item._mouse)
if index then
self.layout:reset()
table.insert(self.items, index, item)
for _, i in ipairs(self.items) do
self.layout:add(i._background)
end
else
table.insert(self.items, item)
self.layout:add(item._background)
end
if self.wibox then
set_size(self)
end
return item
end
--- Delete menu entry at given position
-- @param num The position in the table of the menu entry to be deleted; can be also the menu entry itself
function menu:delete(num)
if type(num) == "table" then
num = util.table.hasitem(self.items, num)
end
local item = self.items[num]
if not item then return end
item.widget:disconnect_signal("mouse::enter", item._mouse)
item.widget.visible = false
table.remove(self.items, num)
if self.sel == num then
self:item_leave(self.sel)
self.sel = nil
end
self.layout:reset()
for _, i in ipairs(self.items) do
self.layout:add(i._background)
end
if self.child[num] then
self.child[num]:hide()
if self.active_child == self.child[num] then
self.active_child = nil
end
table.remove(self.child, num)
end
if self.wibox then
set_size(self)
end
end
--------------------------------------------------------------------------------
--- Build a popup menu with running clients and show it.
-- @tparam[opt] table args Menu table, see `new()` for more information.
-- @tparam[opt] table item_args Table that will be merged into each item, see
-- `new()` for more information.
-- @tparam[opt] func filter A function taking a client as an argument and
-- returning `true` or `false` to indicate whether the client should be
-- included in the menu.
-- @return The menu.
function menu.clients(args, item_args, filter)
local cls_t = {}
for c in client_iterate(filter or function() return true end) do
cls_t[#cls_t + 1] = {
c.name or "",
function ()
if not c:isvisible() then
tags.viewmore(c:tags(), c.screen)
end
c:emit_signal("request::activate", "menu.clients", {raise=true})
end,
c.icon }
if item_args then
if type(item_args) == "function" then
util.table.merge(cls_t[#cls_t], item_args(c))
else
util.table.merge(cls_t[#cls_t], item_args)
end
end
end
args = args or {}
args.items = args.items or {}
util.table.merge(args.items, cls_t)
local m = menu.new(args)
m:show(args)
return m
end
--------------------------------------------------------------------------------
--- Default awful.menu.entry constructor
-- @param parent The parent menu (TODO: This is apparently unused)
-- @param args the item params
-- @return table with 'widget', 'cmd', 'akey' and all the properties the user wants to change
function menu.entry(parent, args) -- luacheck: no unused args
args = args or {}
args.text = args[1] or args.text or ""
args.cmd = args[2] or args.cmd
args.icon = args[3] or args.icon
local ret = {}
-- Create the item label widget
local label = wibox.widget.textbox()
local key = ''
label:set_font(args.theme.font)
label:set_markup(string.gsub(
util.escape(args.text), "&amp;(%w)",
function (l)
key = string.lower(l)
return "<u>" .. l .. "</u>"
end, 1))
-- Set icon if needed
local icon, iconbox
local margin = wibox.layout.margin()
margin:set_widget(label)
if args.icon then
icon = surface.load(args.icon)
end
if icon then
local iw = icon:get_width()
local ih = icon:get_height()
if iw > args.theme.width or ih > args.theme.height then
local w, h
if ((args.theme.height / ih) * iw) > args.theme.width then
w, h = args.theme.height, (args.theme.height / iw) * ih
else
w, h = (args.theme.height / ih) * iw, args.theme.height
end
-- We need to scale the image to size w x h
local img = cairo.ImageSurface(cairo.Format.ARGB32, w, h)
local cr = cairo.Context(img)
cr:scale(w / iw, h / ih)
cr:set_source_surface(icon, 0, 0)
cr:paint()
icon = img
end
iconbox = wibox.widget.imagebox()
if iconbox:set_image(icon) then
margin:set_left(dpi(2))
else
iconbox = nil
end
end
if not iconbox then
margin:set_left(args.theme.height + dpi(2))
end
-- Create the submenu icon widget
local submenu
if type(args.cmd) == "table" then
if args.theme.submenu_icon then
submenu = wibox.widget.imagebox()
submenu:set_image(args.theme.submenu_icon)
else
submenu = wibox.widget.textbox()
submenu:set_font(args.theme.font)
submenu:set_text(args.theme.submenu)
end
end
-- Add widgets to the wibox
local left = wibox.layout.fixed.horizontal()
if iconbox then
left:add(iconbox)
end
-- This contains the label
left:add(margin)
local layout = wibox.layout.align.horizontal()
layout:set_left(left)
if submenu then
layout:set_right(submenu)
end
return table_update(ret, {
label = label,
sep = submenu,
icon = iconbox,
widget = layout,
cmd = args.cmd,
akey = key,
})
end
--------------------------------------------------------------------------------
--- Create a menu popup.
-- @param args Table containing the menu informations.
--
-- * Key items: Table containing the displayed items. Each element is a table by default (when element 'new' is awful.menu.entry) containing: item name, triggered action, submenu table or function, item icon (optional).
-- * Keys theme.[fg|bg]_[focus|normal], theme.border_color, theme.border_width, theme.submenu_icon, theme.height and theme.width override the default display for your menu and/or of your menu entry, each of them are optional.
-- * Key auto_expand controls the submenu auto expand behaviour by setting it to true (default) or false.
--
-- @param parent Specify the parent menu if we want to open a submenu, this value should never be set by the user.
-- @usage -- The following function builds and shows a menu of clients that match
-- -- a particular rule.
-- -- Bound to a key, it can be used to select from dozens of terminals open on
-- -- several tags.
-- -- When using @{rules.match_any} instead of @{rules.match},
-- -- a menu of clients with different classes could be build.
--
-- function terminal_menu ()
-- terms = {}
-- for i, c in pairs(client.get()) do
-- if awful.rules.match(c, {class = "URxvt"}) then
-- terms[i] =
-- {c.name,
-- function()
-- awful.tag.viewonly(c.first_tag)
-- client.focus = c
-- end,
-- c.icon
-- }
-- end
-- end
-- awful.menu(terms):show()
-- end
function menu.new(args, parent)
args = args or {}
args.layout = args.layout or wibox.layout.flex.vertical
local _menu = table_update(object(), {
item_enter = menu.item_enter,
item_leave = menu.item_leave,
get_root = menu.get_root,
delete = menu.delete,
update = menu.update,
toggle = menu.toggle,
hide = menu.hide,
show = menu.show,
exec = menu.exec,
add = menu.add,
child = {},
items = {},
parent = parent,
layout = args.layout(),
theme = load_theme(args.theme or {}, parent and parent.theme) })
if parent then
_menu.auto_expand = parent.auto_expand
elseif args.auto_expand ~= nil then
_menu.auto_expand = args.auto_expand
else
_menu.auto_expand = true
end
-- Create items
for _, v in ipairs(args) do _menu:add(v) end
if args.items then
for _, v in pairs(args.items) do _menu:add(v) end
end
_menu._keygrabber = function (...)
grabber(_menu, ...)
end
_menu.wibox = wibox({
ontop = true,
fg = _menu.theme.fg_normal,
bg = _menu.theme.bg_normal,
border_color = _menu.theme.border,
border_width = _menu.theme.border_width,
type = "popup_menu" })
_menu.wibox.visible = false
_menu.wibox:set_widget(_menu.layout)
set_size(_menu)
_menu.x = _menu.wibox.x
_menu.y = _menu.wibox.y
return _menu
end
function menu.mt:__call(...)
return menu.new(...)
end
return setmetatable(menu, menu.mt)
-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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