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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 apps = Apps.Apps():exact_query("")
local list = Variable(apps)
local text = Variable("")
local selection = Variable(0)
local entry = Variable(nil)
local function exit()
App:quit()
end
local function on_show()
text:set("")
selection:set(0)
entry:get():grab_focus()
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 pos = selection:get()
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()))
local height = math.floor((count + WIDTH - 1) / WIDTH)
pos_x = pos_x % WIDTH
pos_y = pos_y % height
pos = lib.clamp(pos_y * WIDTH + pos_x, 0, count - 1)
selection:set(pos)
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 Application(app, idx)
if idx > MAX_ENTRIES then
return
end
return FlowBoxChild({
Widget.Button({
class_name = selection():as(function(c)
if (c + 1) == idx 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
function Applications(appl)
return FlowBox({
hexpand = true,
homogeneous = true,
class_name = "apps",
lib.map(appl, Application)
})
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",
list():as(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)
-- enable search callback
text:subscribe(function(real_query)
local query = real_query:lower():match("^%s*(.-)%s*$")
if query == "" then
list:set(apps)
return
end
local new_list = {}
for _, app in pairs(apps) do
local name = app.name:lower()
if name:find(query) then
table.insert(new_list, app)
end
end
list:set(new_list)
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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