328 lines
11 KiB
Lua
328 lines
11 KiB
Lua
-- Slightly modified to not take up as much space
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---------------------------------------------------------------------------
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-- Display the current keyboard layout name in a widget.
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--
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--
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-- @author Aleksey Fedotov <lexa@cfotr.com>
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-- @copyright 2015 Aleksey Fedotov
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-- @widgetmod awful.widget.keyboardlayout
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-- @supermodule wibox.widget.base
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---------------------------------------------------------------------------
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local capi = {awesome = awesome}
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local setmetatable = setmetatable
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local textbox = require("wibox.widget.textbox")
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local button = require("awful.button")
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local widget_base = require("wibox.widget.base")
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local gdebug = require("gears.debug")
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--- Keyboard Layout widget.
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-- awful.widget.keyboardlayout
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local keyboardlayout = { mt = {} }
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-- As to the country-code-like symbols below, refer to the names of XKB's
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-- data files in /.../xkb/symbols/*.
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keyboardlayout.xkeyboard_country_code = {
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["ad"] = true, -- Andorra
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["af"] = true, -- Afganistan
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["al"] = true, -- Albania
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["am"] = true, -- Armenia
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["ara"] = true, -- Arabic
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["at"] = true, -- Austria
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["az"] = true, -- Azerbaijan
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["ba"] = true, -- Bosnia and Herzegovina
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["bd"] = true, -- Bangladesh
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["be"] = true, -- Belgium
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["bg"] = true, -- Bulgaria
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["br"] = true, -- Brazil
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["bt"] = true, -- Bhutan
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["bw"] = true, -- Botswana
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["by"] = true, -- Belarus
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["ca"] = true, -- Canada
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["cd"] = true, -- Congo
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["ch"] = true, -- Switzerland
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["cm"] = true, -- Cameroon
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["cn"] = true, -- China
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["cz"] = true, -- Czechia
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["de"] = true, -- Germany
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["dk"] = true, -- Denmark
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["ee"] = true, -- Estonia
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["epo"] = true, -- Esperanto
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["es"] = true, -- Spain
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["et"] = true, -- Ethiopia
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["eu"] = true, -- EurKey
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["fi"] = true, -- Finland
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["fo"] = true, -- Faroe Islands
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["fr"] = true, -- France
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["gb"] = true, -- United Kingdom
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["ge"] = true, -- Georgia
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["gh"] = true, -- Ghana
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["gn"] = true, -- Guinea
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["gr"] = true, -- Greece
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["hr"] = true, -- Croatia
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["hu"] = true, -- Hungary
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["ie"] = true, -- Ireland
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["il"] = true, -- Israel
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["in"] = true, -- India
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["iq"] = true, -- Iraq
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["ir"] = true, -- Iran
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["is"] = true, -- Iceland
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["it"] = true, -- Italy
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["jp"] = true, -- Japan
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["ke"] = true, -- Kenya
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["kg"] = true, -- Kyrgyzstan
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["kh"] = true, -- Cambodia
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["kr"] = true, -- Korea
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["kz"] = true, -- Kazakhstan
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["la"] = true, -- Laos
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["latam"] = true, -- Latin America
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["latin"] = true, -- Latin
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["lk"] = true, -- Sri Lanka
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["lt"] = true, -- Lithuania
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["lv"] = true, -- Latvia
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["ma"] = true, -- Morocco
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["mao"] = true, -- Maori
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["me"] = true, -- Montenegro
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["mk"] = true, -- Macedonia
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["ml"] = true, -- Mali
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["mm"] = true, -- Myanmar
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["mn"] = true, -- Mongolia
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["mt"] = true, -- Malta
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["mv"] = true, -- Maldives
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["ng"] = true, -- Nigeria
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["nl"] = true, -- Netherlands
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["no"] = true, -- Norway
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["np"] = true, -- Nepal
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["ph"] = true, -- Philippines
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["pk"] = true, -- Pakistan
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["pl"] = true, -- Poland
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["pt"] = true, -- Portugal
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["ro"] = true, -- Romania
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["rs"] = true, -- Serbia
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["ru"] = true, -- Russia
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["se"] = true, -- Sweden
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["si"] = true, -- Slovenia
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["sk"] = true, -- Slovakia
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["sn"] = true, -- Senegal
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["sy"] = true, -- Syria
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["th"] = true, -- Thailand
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["tj"] = true, -- Tajikistan
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["tm"] = true, -- Turkmenistan
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["tr"] = true, -- Turkey
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["tw"] = true, -- Taiwan
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["tz"] = true, -- Tanzania
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["ua"] = true, -- Ukraine
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["us"] = true, -- USA
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["uz"] = true, -- Uzbekistan
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["vn"] = true, -- Vietnam
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["za"] = true, -- South Africa
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}
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-- Callback for updating current layout.
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local function update_status (self)
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self._current = awesome.xkb_get_layout_group()
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local text = ""
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if #self._layout > 0 then
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-- Please note that the group number reported by xkb_get_layout_group
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-- is lower by one than the group numbers reported by xkb_get_group_names.
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local name = self._layout[self._current+1]
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if name then
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text = name
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end
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end
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self.widget:set_text(text)
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end
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--- Auxiliary function for the local function update_layout().
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-- Create an array whose element is a table consisting of the four fields:
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-- vendor, file, section and group_idx, which all correspond to the
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-- xkb_symbols pattern "vendor/file(section):group_idx".
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-- @tparam string group_names The string `awesome.xkb_get_group_names()` returns.
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-- @treturn table An array of tables whose keys are vendor, file, section, and group_idx.
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-- @staticfct awful.keyboardlayout.get_groups_from_group_names
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function keyboardlayout.get_groups_from_group_names(group_names)
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if group_names == nil then
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return nil
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end
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-- Pattern elements to be captured.
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local word_pat = "([%w_]+)"
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local sec_pat = "(%b())"
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local idx_pat = ":(%d)"
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-- Pairs of a pattern and its callback. In callbacks, set 'group_idx' to 1
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-- and return it if there's no specification on 'group_idx' in the given
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-- pattern.
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local pattern_and_callback_pairs = {
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-- vendor/file(section):group_idx
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["^" .. word_pat .. "/" .. word_pat .. sec_pat .. idx_pat .. "$"]
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= function(token, pattern)
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local vendor, file, section, group_idx = string.match(token, pattern)
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return vendor, file, section, group_idx
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end,
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-- vendor/file(section)
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["^" .. word_pat .. "/" .. word_pat .. sec_pat .. "$"]
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= function(token, pattern)
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local vendor, file, section = string.match(token, pattern)
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return vendor, file, section, 1
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end,
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-- vendor/file:group_idx
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["^" .. word_pat .. "/" .. word_pat .. idx_pat .. "$"]
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= function(token, pattern)
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local vendor, file, group_idx = string.match(token, pattern)
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return vendor, file, nil, group_idx
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end,
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-- vendor/file
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["^" .. word_pat .. "/" .. word_pat .. "$"]
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= function(token, pattern)
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local vendor, file = string.match(token, pattern)
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return vendor, file, nil, 1
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end,
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-- file(section):group_idx
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["^" .. word_pat .. sec_pat .. idx_pat .. "$"]
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= function(token, pattern)
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local file, section, group_idx = string.match(token, pattern)
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return nil, file, section, group_idx
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end,
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-- file(section)
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["^" .. word_pat .. sec_pat .. "$"]
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= function(token, pattern)
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local file, section = string.match(token, pattern)
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return nil, file, section, 1
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end,
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-- file:group_idx
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["^" .. word_pat .. idx_pat .. "$"]
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= function(token, pattern)
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local file, group_idx = string.match(token, pattern)
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return nil, file, nil, group_idx
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end,
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-- file
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["^" .. word_pat .. "$"]
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= function(token, pattern)
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local file = string.match(token, pattern)
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return nil, file, nil, 1
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end
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}
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-- Split 'group_names' into 'tokens'. The separator is "+".
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local tokens = {}
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string.gsub(group_names, "[^+]+", function(match)
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table.insert(tokens, match)
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end)
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-- For each token in 'tokens', check if it matches one of the patterns in
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-- the array 'pattern_and_callback_pairs', where the patterns are used as
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-- key. If a match is found, extract captured strings using the
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-- corresponding callback function. Check if those extracted is country
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-- specific part of a layout. If so, add it to 'layout_groups'; otherwise,
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-- ignore it.
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local layout_groups = {}
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for i = 1, #tokens do
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for pattern, callback in pairs(pattern_and_callback_pairs) do
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local vendor, file, section, group_idx = callback(tokens[i], pattern)
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if file then
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if not keyboardlayout.xkeyboard_country_code[file] then
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break
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end
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if section then
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section = string.gsub(section, "%(([%w-_]+)%)", "%1")
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end
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table.insert(layout_groups, { vendor = vendor,
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file = file,
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section = section,
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group_idx = tonumber(group_idx) })
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break
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end
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end
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end
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return layout_groups
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end
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-- Callback for updating list of layouts
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local function update_layout(self)
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self._layout = {};
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local layouts = keyboardlayout.get_groups_from_group_names(awesome.xkb_get_group_names())
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if layouts == nil or layouts[1] == nil then
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gdebug.print_error("Failed to get list of keyboard groups")
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return
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end
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if #layouts == 1 then
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layouts[1].group_idx = 1
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end
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for _, v in ipairs(layouts) do
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self._layout[v.group_idx] = self.layout_name(v)
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end
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update_status(self)
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end
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--- Select the next layout.
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-- @noreturn
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-- @method next_layout
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--- Create a keyboard layout widget.
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--
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-- It shows current keyboard layout name in a textbox.
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--
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-- @constructorfct awful.widget.keyboardlayout
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-- @treturn awful.widget.keyboardlayout A keyboard layout widget.
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function keyboardlayout.new()
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local widget = textbox()
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local self = widget_base.make_widget(widget, nil, {enable_properties=true})
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self.widget = widget
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self.layout_name = function(v)
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local name = v.file
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if v.section ~= nil then
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name = name .. "(" .. v.section .. ")"
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end
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return name
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end
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self.next_layout = function()
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self.set_layout((self._current + 1) % (#self._layout + 1))
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end
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self.set_layout = function(group_number)
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if (0 > group_number) or (group_number > #self._layout) then
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error("Invalid group number: " .. group_number ..
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"expected number from 0 to " .. #self._layout)
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return;
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end
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awesome.xkb_set_layout_group(group_number);
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end
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update_layout(self);
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-- callback for processing layout changes
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capi.awesome.connect_signal("xkb::map_changed",
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function () update_layout(self) end)
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capi.awesome.connect_signal("xkb::group_changed",
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function () update_status(self) end);
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-- Mouse bindings
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self.buttons = {
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button({ }, 1, self.next_layout)
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}
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return self
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end
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local _instance = nil;
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function keyboardlayout.mt:__call(...)
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if _instance == nil then
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_instance = keyboardlayout.new(...)
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end
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return _instance
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end
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return setmetatable(keyboardlayout, keyboardlayout.mt)
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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