New Setup 📦

home/.config/awesome/libs/bling/widget/task_preview.lua

@@ -0,0 +1,199 @@
+--
+-- Provides:
+-- bling::task_preview::visibility
+--      s   (screen)
+--      v   (boolean)
+--      c   (client)
+--
+local awful = require("awful")
+local wibox = require("wibox")
+local helpers = require(tostring(...):match(".*bling") .. ".helpers")
+local gears = require("gears")
+local beautiful = require("beautiful")
+local dpi = beautiful.xresources.apply_dpi
+local cairo = require("lgi").cairo
+
+-- TODO: rename structure to something better?
+local function draw_widget(
+    c,
+    widget_template,
+    screen_radius,
+    widget_bg,
+    widget_border_color,
+    widget_border_width,
+    margin,
+    widget_width,
+    widget_height
+)
+    if not pcall(function()
+        return type(c.content)
+    end) then
+        return
+    end
+
+    local content = nil
+    if c.active then
+        content = gears.surface(c.content)
+    elseif c.prev_content then
+        content = gears.surface(c.prev_content)
+    end
+
+    local img = nil
+    if content ~= nil then
+        local cr = cairo.Context(content)
+        local x, y, w, h = cr:clip_extents()
+        img = cairo.ImageSurface.create(cairo.Format.ARGB32, w - x, h - y)
+        cr = cairo.Context(img)
+        cr:set_source_surface(content, 0, 0)
+        cr.operator = cairo.Operator.SOURCE
+        cr:paint()
+    end
+
+    local widget = wibox.widget({
+        (widget_template or {
+            {
+                {
+                    {
+                        {
+                            id = "icon_role",
+                            resize = true,
+                            forced_height = dpi(20),
+                            forced_width = dpi(20),
+                            widget = wibox.widget.imagebox,
+                        },
+                        {
+                            {
+                                id = "name_role",
+                                align = "center",
+                                widget = wibox.widget.textbox,
+                            },
+                            left = dpi(4),
+                            right = dpi(4),
+                            widget = wibox.container.margin,
+                        },
+                        layout = wibox.layout.align.horizontal,
+                    },
+                    {
+                        {
+                            {
+                                id = "image_role",
+                                resize = true,
+                                clip_shape = helpers.shape.rrect(screen_radius),
+                                widget = wibox.widget.imagebox,
+                            },
+                            valign = "center",
+                            halign = "center",
+                            widget = wibox.container.place,
+                        },
+                        top = margin * 0.25,
+                        widget = wibox.container.margin,
+                    },
+                    fill_space = true,
+                    layout = wibox.layout.fixed.vertical,
+                },
+                margins = margin,
+                widget = wibox.container.margin,
+            },
+            bg = widget_bg,
+            shape_border_width = widget_border_width,
+            shape_border_color = widget_border_color,
+            shape = helpers.shape.rrect(screen_radius),
+            widget = wibox.container.background,
+        }),
+        width = widget_width,
+        height = widget_height,
+        widget = wibox.container.constraint,
+    })
+
+    -- TODO: have something like a create callback here?
+
+    for _, w in ipairs(widget:get_children_by_id("image_role")) do
+        w.image = img -- TODO: copy it with gears.surface.xxx or something
+    end
+
+    for _, w in ipairs(widget:get_children_by_id("name_role")) do
+        w.text = c.name
+    end
+
+    for _, w in ipairs(widget:get_children_by_id("icon_role")) do
+        w.image = c.icon -- TODO: detect clienticon
+    end
+
+    return widget
+end
+
+local enable = function(opts)
+    local opts = opts or {}
+
+    local widget_x = opts.x or dpi(20)
+    local widget_y = opts.y or dpi(20)
+    local widget_height = opts.height or dpi(200)
+    local widget_width = opts.width or dpi(200)
+    local placement_fn = opts.placement_fn or nil
+
+    local margin = beautiful.task_preview_widget_margin or dpi(0)
+    local screen_radius = beautiful.task_preview_widget_border_radius or dpi(0)
+    local widget_bg = beautiful.task_preview_widget_bg or "#000000"
+    local widget_border_color = beautiful.task_preview_widget_border_color
+        or "#ffffff"
+    local widget_border_width = beautiful.task_preview_widget_border_width
+        or dpi(3)
+
+    local task_preview_box = awful.popup({
+        type = "dropdown_menu",
+        visible = false,
+        ontop = true,
+        placement = placement_fn,
+        widget = wibox.container.background, -- A dummy widget to make awful.popup not scream
+        input_passthrough = true,
+        bg = "#00000000",
+    })
+
+    tag.connect_signal("property::selected", function(t)
+        -- Awesome switches up tags on startup really fast it seems, probably depends on what rules you have set
+        -- which can cause the c.content to not show the correct image
+        gears.timer
+        {
+            timeout = 0.1,
+            call_now  = false,
+            autostart = true,
+            single_shot = true,
+            callback = function()
+                if t.selected == true then
+                    for _, c in ipairs(t:clients()) do
+                        c.prev_content = gears.surface.duplicate_surface(c.content)
+                    end
+                end
+            end
+        }
+    end)
+
+    awesome.connect_signal("bling::task_preview::visibility", function(s, v, c)
+        if v then
+            -- Update task preview contents
+            task_preview_box.widget = draw_widget(
+                c,
+                opts.structure,
+                screen_radius,
+                widget_bg,
+                widget_border_color,
+                widget_border_width,
+                margin,
+                widget_width,
+                widget_height
+            )
+        else
+            task_preview_box.widget = nil
+            collectgarbage("collect")
+        end
+
+        if not placement_fn then
+            task_preview_box.x = s.geometry.x + widget_x
+            task_preview_box.y = s.geometry.y + widget_y
+        end
+
+        task_preview_box.visible = v
+    end)
+end
+
+return { enable = enable, draw_widget = draw_widget }