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local astal = require("astal")
local Widget = require("astal.gtk3.widget")
local App = require("astal.gtk3.app")
local Gdk = require("astal.gtk3").Gdk
local Gtk = require("astal.gtk3").Gtk
local astalify = require("astal.gtk3").astalify
local Apps = astal.require("AstalApps")
local Variable = astal.Variable
local lib = require("lib")
local WIDTH
local MAX_ENTRIES
local FlowBox = astalify(Gtk.FlowBox)
local FlowBoxChild = astalify(Gtk.FlowBoxChild)
local function exit()
App:quit()
end
local selection = Variable(0)
local entry = Variable(nil)
function Application(app, selected)
return FlowBoxChild({
Widget.Button({
class_name = selected(function(bool)
if bool then
return "app selected"
else
return "app"
end
end),
on_clicked = function()
app:launch()
exit()
end,
Widget.Box({
halign = "CENTER",
valign = "CENTER",
vertical = true,
Widget.Icon({
icon = app.icon_name,
}),
Widget.Label({
class_name = "name",
label = app.name,
valign = "CENTER",
ellipsize = "END",
max_width_chars = 16,
}),
}),
}),
})
end
local astal_apps = Apps.Apps()
local apps = {}
local function get_app(key)
local tbl = apps[key]
if tbl.elm == nil then
local selected = Variable(false)
tbl.elm = Application(tbl.app, selected)
tbl.selected = selected
apps[entry] = tbl
end
return tbl
end
for _,app in pairs(astal_apps.list) do
apps[app.entry] = {
app = app,
}
end
local text = Variable("")
local list = text(function(query)
return lib.slice(astal_apps:fuzzy_query(query), 0, MAX_ENTRIES)
end)
local function on_enter()
local app = list:get()[selection:get() + 1]
app:launch()
exit()
end
local function update_pos(change_x, change_y)
local old_pos = selection:get()
local pos = old_pos
local pos_x = (pos % WIDTH) + change_x
local pos_y = math.floor(pos / WIDTH) + change_y
local count = math.min(MAX_ENTRIES, lib.count(list:get()))
pos_x = pos_x % WIDTH
pos_y = pos_y % (MAX_ENTRIES/WIDTH)
pos = lib.clamp(pos_y * WIDTH + pos_x, 0, count - 1)
selection:set(pos)
local old_app = list:get()[old_pos + 1]
if old_app then
get_app(old_app.entry).selected:set(false)
end
local app = list:get()[pos + 1]
if app then
get_app(app.entry).selected:set(true)
end
end
local function on_key_press(_, event)
if event.keyval == Gdk.KEY_Escape then
exit()
elseif event.keyval == Gdk.KEY_Return then
on_enter()
elseif event.keyval == Gdk.KEY_Left then
update_pos(-1, 0)
elseif event.keyval == Gdk.KEY_Right then
update_pos(1, 0)
elseif event.keyval == Gdk.KEY_Up then
update_pos(0, -1)
elseif event.keyval == Gdk.KEY_Down then
update_pos(0, 1)
end
end
function Applications()
return FlowBox({
hexpand = true,
homogeneous = true,
class_name = "apps",
list:as(function(l)
-- remove all old elements
for _,tbl in pairs(apps) do
local elm = tbl.elm
if elm then
local parent = elm.parent
if parent ~= nil then
parent:remove(elm)
end
end
end
-- map list to elements
return lib.map(l, function(app)
local tbl = get_app(app.entry)
return tbl.elm
end)
end),
})
end
function Launcher()
return Widget.Box({
vertical = true,
Widget.Entry({
class_name = "search",
placeholder_text = "Search",
halign = "CENTER",
text = text(),
setup = function(self)
entry:set(self)
end,
on_changed = function(self)
text:set(self.text)
selection:set(0)
end,
}),
Widget.Box({
class_name = "apps",
Applications(),
}),
})
end
local function calc_bounds(gdkmonitor)
-- constants
local font_size = 14
local outer_gap = 12
-- get screen dimensions
local screen_width = gdkmonitor.geometry.width
local screen_height = gdkmonitor.geometry.height
-- calculate size of a cell
local cell_min_width = 15 * font_size
local cell_padding = outer_gap*4
local cell_size = cell_min_width + cell_padding
-- caculate usuable bounds
local used_width = 2*5*font_size
local used_height = 15*font_size
local free_width = screen_width - used_width
local free_height = screen_height - used_height
-- caculate counts
local width = math.floor(free_width / cell_size)
local height = math.floor(free_height / cell_size)
WIDTH = width
MAX_ENTRIES = width*height
end
return function(gdkmonitor)
local Anchor = astal.require('Astal').WindowAnchor
calc_bounds(gdkmonitor)
local function on_show()
text:set("")
selection:set(0)
entry:get():grab_focus()
end
return Widget.Window({
class_name = "launcher",
gdkmonitor = gdkmonitor,
anchor = Anchor.TOP + Anchor.BOTTOM + Anchor.LEFT + Anchor.RIGHT,
exclusivity = "EXCLUSIVE",
keymode = "ON_DEMAND",
application = App,
on_show = on_show,
on_key_press_event = on_key_press,
Launcher(),
})
end
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