lib/awful/menu.lua.in

   1 ---------------------------------------------------------------------------
   2 -- @author Damien Leone &lt;damien.leone@gmail.com&gt;
   3 -- @author Julien Danjou &lt;julien@danjou.info&gt;
   4 -- @copyright 2008 Damien Leone, Julien Danjou
   5 -- @release @AWESOME_VERSION@
   6 ---------------------------------------------------------------------------
   7
   8 -- Grab environment we need
   9 local pairs = pairs
  10 local table = table
  11 local string = string
  12 local type = type
  13 local setmetatable = setmetatable
  14 local wibox = wibox
  15 local image = image
  16 local widget = widget
  17 local button = require("awful.button")
  18 local capi =
  19 {
  20     screen = screen,
  21     mouse = mouse,
  22     client = client,
  23     keygrabber = keygrabber
  24 }
  25 local util = require("awful.util")
  26 local tags = require("awful.tag")
  27 local layout = require("awful.widget.layout")
  28 local awbeautiful = require("beautiful")
  29 local tonumber = tonumber
  30
  31 --- Creation of menus.
  32 module("awful.menu")
  33
  34 local cur_menu
  35
  36 --- Key bindings for menu navigation.
  37 -- Keys are: up, down, exec, back, close. Value are table with a list of valid
  38 -- keys for the action, i.e. menu_keys.up =  { "j", "k" } will bind 'j' and 'k'
  39 -- key to up action. This is common to all created menu.
  40 -- @class table
  41 -- @name menu_keys
  42 menu_keys = { up = { "Up" },
  43               down = { "Down" },
  44               exec = { "Return", "Right" },
  45               back = { "Left" },
  46               close = { "Escape" } }
  47
  48 local function load_theme(custom)
  49     local theme = {}
  50     local beautiful
  51
  52     beautiful = awbeautiful.get()
  53
  54     theme.fg_focus = custom.fg_focus or beautiful.menu_fg_focus or beautiful.fg_focus
  55     theme.bg_focus = custom.bg_focus or beautiful.menu_bg_focus or beautiful.bg_focus
  56     theme.fg_normal = custom.fg_normal or beautiful.menu_fg_normal or beautiful.fg_normal
  57     theme.bg_normal = custom.bg_normal or beautiful.menu_bg_normal or beautiful.bg_normal
  58
  59     theme.submenu_icon = custom.submenu_icon or beautiful.menu_submenu_icon
  60
  61     theme.menu_height = custom.height or beautiful.menu_height or 16
  62     theme.menu_width = custom.width or beautiful.menu_width or 100
  63
  64     theme.border = custom.border_color or beautiful.menu_border_color or beautiful.border_normal
  65     theme.border_width = custom.border_width or beautiful.menu_border_width or beautiful.border_width
  66
  67     return theme
  68 end
  69
  70 local function item_leave(menu, num)
  71     if num > 0 then
  72         menu.items[num].wibox.fg = menu.theme.fg_normal
  73         menu.items[num].wibox.bg = menu.theme.bg_normal
  74     end
  75 end
  76
  77 --- Hide a menu popup.
  78 -- @param menu The menu to hide.
  79 function hide(menu)
  80     -- Remove items from screen
  81     for i = 1, #menu.items do
  82         item_leave(menu, i)
  83         menu.items[i].wibox.screen = nil
  84     end
  85     if menu.active_child then
  86         menu.active_child:hide()
  87         menu.active_child = nil
  88     end
  89     menu.sel = nil
  90
  91     if cur_menu == menu then
  92         cur_menu = cur_menu.parent
  93     end
  94     if not cur_menu and menu.keygrabber then
  95         capi.keygrabber.stop()
  96     end
  97 end
  98
  99 -- Get the elder parent so for example when you kill
 100 -- it, it will destroy the whole family.
 101 local function get_parents(menu)
 102     if menu.parent then
 103         return get_parents(menu.parent)
 104     end
 105     return menu
 106 end
 107
 108 local function exec(menu, num, mouse_event)
 109     local cmd = menu.items[num].cmd
 110     if type(cmd) == "table" then
 111         if #cmd == 0 then
 112             return
 113         end
 114         if not menu.child[num] then
 115             menu.child[num] = new({ items = cmd }, menu, num)
 116         end
 117
 118         if menu.active_child then
 119             menu.active_child:hide()
 120             menu.active_child = nil
 121         end
 122         menu.active_child = menu.child[num]
 123         menu.active_child:show()
 124     elseif type(cmd) == "string" then
 125         get_parents(menu):hide()
 126         util.spawn(cmd)
 127     elseif type(cmd) == "function" then
 128         get_parents(menu):hide()
 129         cmd(menu.items[num].returned_value)
 130     end
 131 end
 132
 133 local function item_enter(menu, num, mouse_event)
 134     if menu.sel == num then
 135         return
 136     elseif menu.sel then
 137         item_leave(menu, menu.sel)
 138     end
 139
 140     menu.items[num].wibox.fg = menu.theme.fg_focus
 141     menu.items[num].wibox.bg = menu.theme.bg_focus
 142     menu.sel = num
 143     cur_menu = menu
 144
 145     if menu.auto_expand and mouse_event then
 146         if menu.active_child then
 147             menu.active_child:hide()
 148             menu.active_child = nil
 149         end
 150
 151         if type(menu.items[num].cmd) == "table" then
 152             exec(menu, num)
 153         end
 154     end
 155 end
 156
 157 local function check_access_key(menu, key)
 158    for i, item in pairs(menu.items) do
 159       if item.akey == key then
 160          exec(menu, i)
 161          return
 162       end
 163    end
 164    if menu.parent then
 165       check_access_key(menu.parent, key)
 166    end
 167 end
 168
 169 local function grabber(mod, key, event)
 170     if event == "release" then
 171        return true
 172     end
 173
 174     local sel = cur_menu.sel or 0
 175     if util.table.hasitem(menu_keys.up, key) then
 176         local sel_new = sel-1 < 1 and #cur_menu.items or sel-1
 177         item_enter(cur_menu, sel_new)
 178     elseif util.table.hasitem(menu_keys.down, key) then
 179         local sel_new = sel+1 > #cur_menu.items and 1 or sel+1
 180         item_enter(cur_menu, sel_new)
 181     elseif sel > 0 and util.table.hasitem(menu_keys.exec, key) then
 182         exec(cur_menu, sel)
 183     elseif util.table.hasitem(menu_keys.back, key) then
 184         cur_menu:hide()
 185     elseif util.table.hasitem(menu_keys.close, key) then
 186         get_parents(cur_menu):hide()
 187     else
 188         check_access_key(cur_menu, key)
 189     end
 190
 191     return true
 192 end
 193
 194 local function add_item(data, num, item_info)
 195     local item = wibox({
 196         fg = data.theme.fg_normal,
 197         bg = data.theme.bg_normal,
 198         border_color = data.theme.border,
 199         border_width = data.theme.border_width
 200     })
 201
 202     -- Create bindings
 203     local bindings = util.table.join(
 204         button({}, 1, function () item_enter(data, num); exec(data, num) end),
 205         button({}, 3, function () data:hide() end)
 206     )
 207
 208     -- Create the item label widget
 209     local label = widget({ type = "textbox" })
 210     local key = ''
 211     label.text = string.gsub(util.escape(item_info[1]), "&amp;(%w)",
 212                              function (l)
 213                                  key = string.lower(l)
 214                                  return "<u>"..l.."</u>"
 215                              end, 1)
 216     -- Set icon if needed
 217     local iconbox
 218     if item_info[3] then
 219         local icon = type(item_info[3]) == "string" and image(item_info[3]) or item_info[3]
 220         if icon.width > data.h or icon.height > data.h then
 221             local width, height
 222             if ((data.h/icon.height) * icon.width) > data.h then
 223                 width, height = data.h, (data.h / icon.width) * icon.height
 224             else
 225                 width, height = (data.h / icon.height) * icon.width, data.h
 226             end
 227             icon = icon:crop_and_scale(0, 0, icon.width, icon.height, width, height)
 228         end
 229         iconbox = widget { type = "imagebox" }
 230         iconbox.image = icon
 231         layout.margins[label] = { left = 2 }
 232     else
 233         layout.margins[label] = { left = data.h + 2 }
 234     end
 235
 236     item:buttons(bindings)
 237
 238     local mouse_enter_func = function () item_enter(data, num, true) end
 239     item:add_signal("mouse::enter", mouse_enter_func)
 240
 241     -- Create the submenu icon widget
 242     local submenu
 243     if type(item_info[2]) == "table" then
 244         submenu = widget({ type = "imagebox" })
 245         submenu.image = data.theme.submenu_icon and image(data.theme.submenu_icon)
 246         submenu:buttons(bindings)
 247     end
 248
 249     -- Add widgets to the wibox
 250     if iconbox then
 251         item.widgets = {
 252             iconbox,
 253             label,
 254             { submenu, layout = layout.horizontal.rightleft },
 255             layout = layout.horizontal.leftright
 256         }
 257     else
 258         item.widgets = {
 259             label,
 260             { submenu, layout = layout.horizontal.rightleft },
 261             layout = layout.horizontal.leftright
 262         }
 263     end
 264
 265     item.height = label:extents().height + 2
 266     item.ontop = true
 267
 268     return { wibox = item, akey= key, cmd = item_info[2], returned_value=item_info[1] }
 269 end
 270
 271 --- Build a popup menu with running clients and shows it.
 272 -- @param menu Menu table, see new() function for more informations
 273 -- @param keygrabber A boolean enabling or not the keyboard navigation.
 274 -- @return The menu.
 275 function clients(menu, keygrabber)
 276     local cls = capi.client.get()
 277     local cls_t = {}
 278     for k, c in pairs(cls) do
 279         cls_t[#cls_t + 1] = { util.escape(c.name) or "",
 280                               function ()
 281                                   if not c:isvisible() then
 282                                       tags.viewmore(c:tags(), c.screen)
 283                                   end
 284                                   capi.client.focus = c
 285                               end,
 286                               c.icon }
 287     end
 288
 289     if not menu then
 290         menu = {}
 291     end
 292
 293     menu.items = cls_t
 294
 295     local m = new(menu)
 296     m:show(keygrabber)
 297     return m
 298 end
 299
 300 local function set_coords(menu, screen_idx)
 301     local s_geometry = capi.screen[screen_idx].workarea
 302     local screen_w = s_geometry.x + s_geometry.width
 303     local screen_h = s_geometry.y + s_geometry.height
 304
 305     local i_h = menu.h + menu.theme.border_width
 306     local m_h = (i_h * #menu.items) + menu.theme.border_width
 307
 308     if menu.parent then
 309         menu.w = menu.parent.w
 310         menu.h = menu.parent.h
 311
 312         local p_w = i_h * (menu.num - 1)
 313         local m_w = menu.w - menu.theme.border_width
 314
 315         menu.y = menu.parent.y + p_w + m_h > screen_h and screen_h - m_h or menu.parent.y + p_w
 316         menu.x = menu.parent.x + m_w*2 > screen_w and menu.parent.x - m_w or menu.parent.x + m_w
 317     else
 318         local m_coords = capi.mouse.coords()
 319         local m_w = menu.w
 320
 321         menu.y = m_coords.y+1 < s_geometry.y and s_geometry.y or m_coords.y+1
 322         menu.x = m_coords.x+1 < s_geometry.x and s_geometry.x or m_coords.x+1
 323
 324         menu.y = menu.y + m_h > screen_h and screen_h - m_h or menu.y
 325         menu.x = menu.x + m_w > screen_w and screen_w - m_w or menu.x
 326     end
 327 end
 328
 329 --- Show a menu.
 330 -- @param menu The menu to show.
 331 -- @param keygrabber A boolean enabling or not the keyboard navigation.
 332 function show(menu, keygrabber)
 333     local screen_index = capi.mouse.screen
 334     set_coords(menu, screen_index)
 335     for num, item in pairs(menu.items) do
 336         local wibox = item.wibox
 337         wibox.width = menu.w
 338         wibox.height = menu.h
 339         wibox.x = menu.x
 340         wibox.y = menu.y + (num - 1) * (menu.h + wibox.border_width)
 341         wibox.screen = screen_index
 342     end
 343
 344     if menu.parent then
 345         menu.keygrabber = menu.parent.keygrabber
 346     elseif keygrabber ~= nil then
 347         menu.keygrabber = keygrabber
 348     else
 349         menu.keygrabber = false
 350     end
 351
 352     if not cur_menu and menu.keygrabber then
 353         capi.keygrabber.run(grabber)
 354     end
 355     cur_menu = menu
 356 end
 357
 358 --- Toggle menu visibility.
 359 -- @param menu The menu to show if it's hidden, or to hide if it's shown.
 360 -- @param keygrabber A boolean enabling or not the keyboard navigation.
 361 function toggle(menu, keygrabber)
 362     if menu.items[1] and menu.items[1].wibox.screen then
 363         menu:hide()
 364     else
 365         menu:show(keygrabber)
 366     end
 367 end
 368
 369 --- Open a menu popup.
 370 -- @param menu Table containing the menu informations. Key items: Table containing the displayed items, each element is a tab containing: item name, triggered action, submenu table or function, item icon (optional). Keys [fg|bg]_[focus|normal], border, border_width, submenu_icon, height and width override the default display for your menu, each of them are optional. Key auto_expand controls the submenu auto expand behaviour by setting it to true (default) or false.
 371 -- @param parent Specify the parent menu if we want to open a submenu, this value should never be set by the user.
 372 -- @param num Specify the parent's clicked item number if we want to open a submenu, this value should never be set by the user.
 373 function new(menu, parent, num)
 374     -- Create a table to store our menu informations
 375     local data = {}
 376
 377     data.items = {}
 378     data.num = num or 1
 379     data.theme = parent and parent.theme or load_theme(menu)
 380     data.parent = parent
 381     data.child = {}
 382     if parent then
 383         data.auto_expand = parent.auto_expand
 384     elseif menu.auto_expand ~= nil then
 385         data.auto_expand = menu.auto_expand
 386     else
 387         data.auto_expand = true
 388     end
 389     data.h = parent and parent.h or data.theme.menu_height
 390     if type(data.h) ~= 'number' then data.h = tonumber(data.h) end
 391     data.w = parent and parent.w or data.theme.menu_width
 392     if type(data.w) ~= 'number' then data.w = tonumber(data.w) end
 393
 394     -- Create items
 395     for k, v in pairs(menu.items) do
 396         table.insert(data.items, add_item(data, k, v))
 397     end
 398
 399     if #data.items > 0 and data.h < data.items[1].wibox.height then
 400         data.h = data.items[1].wibox.height
 401     end
 402
 403     -- Set methods
 404     data.hide = hide
 405     data.show = show
 406     data.toggle = toggle
 407
 408     return data
 409 end
 410
 411 setmetatable(_M, { __call = function(_, ...) return new(...) end })
 412
 413 -- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80