135 lines
3.4 KiB
Lua
135 lines
3.4 KiB
Lua
--- Container showing the icon of a client.
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-- @author Uli Schlachter
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-- @copyright 2017 Uli Schlachter
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-- @widgetmod awful.widget.clienticon
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local base = require("wibox.widget.base")
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local surface = require("gears.surface")
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local gtable = require("gears.table")
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local clienticon = {}
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local instances = setmetatable({}, { __mode = "k" })
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local function find_best_icon(sizes, width, height)
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local best, best_size
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for k, size in ipairs(sizes) do
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if not best then
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best, best_size = k, size
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else
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local best_too_small = best_size[1] < width or best_size[2] < height
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local best_too_large = best_size[1] > width or best_size[2] > height
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local better_because_bigger = best_too_small and size[1] > best_size[1] and size[2] > best_size[2]
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local better_because_smaller = best_too_large and size[1] < best_size[1] and size[2] < best_size[2]
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and size[1] >= width and size[2] >= height
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if better_because_bigger or better_because_smaller then
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best, best_size = k, size
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end
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end
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end
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return best, best_size
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end
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function clienticon:draw(_, cr, width, height)
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local c = self._private.client
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if not c or not c.valid then
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return
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end
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local index, size = find_best_icon(c.icon_sizes, width, height)
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if not index then
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return
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end
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local aspect_w = width / size[1]
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local aspect_h = height / size[2]
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local aspect = math.min(aspect_w, aspect_h)
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cr:scale(aspect, aspect)
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local s = surface(c:get_icon(index))
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cr:set_source_surface(s, 0, 0)
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cr:paint()
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end
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function clienticon:fit(_, width, height)
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local c = self._private.client
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if not c or not c.valid then
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return 0, 0
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end
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local index, size = find_best_icon(c.icon_sizes, width, height)
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if not index then
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return 0, 0
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end
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local w, h = size[1], size[2]
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if w > width then
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h = h * width / w
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w = width
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end
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if h > height then
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w = w * height / h
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h = height
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end
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if h == 0 or w == 0 then
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return 0, 0
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end
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local aspect = math.min(width / w, height / h)
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return w * aspect, h * aspect
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end
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--- The widget's @{client}.
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--
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-- @property client
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-- @param client
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function clienticon:get_client()
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return self._private.client
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end
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function clienticon:set_client(c)
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if self._private.client == c then return end
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self._private.client = c
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self:emit_signal("widget::layout_changed")
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self:emit_signal("widget::redraw_needed")
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end
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--- Returns a new clienticon.
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-- @tparam client c The client whose icon should be displayed.
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-- @treturn widget A new `widget`
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-- @constructorfct awful.widget.clienticon
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local function new(c)
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local ret = base.make_widget(nil, nil, {enable_properties = true})
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gtable.crush(ret, clienticon, true)
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ret._private.client = c
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instances[ret] = true
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return ret
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end
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client.connect_signal("property::icon", function(c)
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for obj in pairs(instances) do
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if obj._private.client.valid and obj._private.client == c then
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obj:emit_signal("widget::layout_changed")
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obj:emit_signal("widget::redraw_needed")
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end
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end
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end)
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--@DOC_widget_COMMON@
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--@DOC_object_COMMON@
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return setmetatable(clienticon, {
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__call = function(_, ...)
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return new(...)
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end
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})
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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