246 lines
9.0 KiB
Lua
246 lines
9.0 KiB
Lua
---------------------------------------------------------------------------
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--- Querying current GTK+ 3 theme via GtkStyleContext.
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--
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-- @author Yauheni Kirylau <yawghen@gmail.com>
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-- @copyright 2016-2017 Yauheni Kirylau
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-- @themelib beautiful.gtk
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---------------------------------------------------------------------------
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local get_dpi = require("beautiful.xresources").get_dpi
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local gears_debug = require("gears.debug")
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local gears_math = require("gears.math")
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local join = require("gears.table").join
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local unpack = unpack or table.unpack -- luacheck: globals unpack (compatibility with Lua 5.1)
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local gtk = {
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cached_theme_variables = nil
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}
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local function convert_gtk_channel_to_hex(channel_value)
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return string.format("%02x", gears_math.round(channel_value * 255))
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end
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local function convert_gtk_color_to_hex(gtk_color)
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return "#" ..
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convert_gtk_channel_to_hex(gtk_color.red) ..
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convert_gtk_channel_to_hex(gtk_color.green) ..
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convert_gtk_channel_to_hex(gtk_color.blue) ..
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convert_gtk_channel_to_hex(gtk_color.alpha)
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end
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local function lookup_gtk_color_to_hex(_style_context, color_name)
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local gtk_color = _style_context:lookup_color(color_name)
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if not gtk_color then
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return nil
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end
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return convert_gtk_color_to_hex(gtk_color)
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end
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local function get_gtk_property(_style_context, property_name)
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local state = _style_context:get_state()
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local property = _style_context:get_property(property_name, state)
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if not property then
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return nil
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end
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return property.value
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end
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local function get_gtk_color_property_to_hex(_style_context, property_name)
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return convert_gtk_color_to_hex(
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get_gtk_property(_style_context, property_name)
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)
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end
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local function read_gtk_color_properties_from_widget(gtk_widget, properties)
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local _style_context = gtk_widget:get_style_context()
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local result = {}
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for result_key, style_context_property in pairs(properties) do
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result[result_key] = get_gtk_color_property_to_hex(
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_style_context, style_context_property
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)
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end
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return result
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end
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function gtk.get_theme_variables()
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if gtk.cached_theme_variables then
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return gtk.cached_theme_variables
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end
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local result = {}
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local _gtk_status, Gtk = pcall(function()
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return require('lgi').Gtk
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end)
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if not _gtk_status or not Gtk then
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gears_debug.print_warning(
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"Can't load GTK+3 introspection. "..
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"Seems like GTK+3 is not installed or `lua-lgi` was built with an incompatible GTK+3 version."
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)
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return nil
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end
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local _window_status, window = pcall(function()
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return Gtk.Window.new(Gtk.WindowType.TOPLEVEL)
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end)
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if not _window_status or not window then
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gears_debug.print_warning(
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"Can't create GTK+3 window. "..
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"Seems like GTK+3 theme is not set correctly or `lua-lgi` was built with an incompatible GTK+3 version."
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)
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return nil
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end
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local style_context = window:get_style_context()
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result = join(result, read_gtk_color_properties_from_widget(
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window, {
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bg_color="background-color",
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fg_color="color",
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}
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))
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local label = Gtk.Label()
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local label_style_context = label:get_style_context()
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local gdk_scale = tonumber(os.getenv("GDK_SCALE") or 1.0)
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local xrdb_scale = get_dpi() / 96
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local pt_to_px_ratio = 1+1/3
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result["font_size"] = get_gtk_property(
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label_style_context, "font-size"
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) * gdk_scale / xrdb_scale / pt_to_px_ratio
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result["font_family"] = get_gtk_property(
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label_style_context, "font-family"
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)[1]
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result = join(result, read_gtk_color_properties_from_widget(
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Gtk.Entry(), {
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base_color="background-color",
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text_color="color",
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}
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))
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result = join(result, read_gtk_color_properties_from_widget(
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Gtk.ToggleButton(), {
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selected_bg_color="background-color",
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selected_fg_color="color",
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}
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))
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local button = Gtk.Button()
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result = join(result, read_gtk_color_properties_from_widget(
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button, {
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button_bg_color="background-color",
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button_fg_color="color",
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button_border_color="border-color",
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}
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))
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local button_style_context = button:get_style_context()
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for result_key, style_context_property in pairs({
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button_border_radius="border-radius",
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button_border_width="border-top-width",
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}) do
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local state = style_context:get_state()
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local property = button_style_context:get_property(style_context_property, state)
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result[result_key] = property.value
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property:unset()
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end
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local headerbar = Gtk.HeaderBar()
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window:set_titlebar(headerbar)
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result = join(result, read_gtk_color_properties_from_widget(
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headerbar, {
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menubar_bg_color="background-color",
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}
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))
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if result.menubar_bg_color and result.menubar_bg_color ~= "#00000000" then
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headerbar:add(label)
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result = join(result, read_gtk_color_properties_from_widget(
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label, {
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menubar_fg_color="color",
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}
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))
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end
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headerbar:add(button)
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result = join(result, read_gtk_color_properties_from_widget(
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button, {
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header_button_bg_color="background-color",
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header_button_border_color="border-color",
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}
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))
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if result.header_button_bg_color and result.header_button_bg_color ~= "#00000000" then
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result = join(result, read_gtk_color_properties_from_widget(
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button, {
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header_button_fg_color="color",
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}
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))
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end
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local error_button = Gtk.Button()
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error_button:get_style_context():add_class("destructive-action")
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result = join(result, read_gtk_color_properties_from_widget(
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error_button, {
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error_bg_color="background-color",
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error_fg_color="color",
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}
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))
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for _, color_data in ipairs({
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{"bg_color", "theme_bg_color"},
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{"fg_color", "theme_fg_color"},
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{"base_color", "theme_base_color"},
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{"text_color", "theme_text_color"},
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{"selected_bg_color", "theme_selected_bg_color"},
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{"selected_fg_color", "theme_selected_fg_color"},
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--
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{"tooltip_bg_color", "theme_tooltip_bg_color", "bg_color"},
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{"tooltip_fg_color", "theme_tooltip_fg_color", "fg_color"},
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{"osd_bg_color", "osd_bg", "tooltip_bg_color"},
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{"osd_fg_color", "osd_fg", "tooltip_fg_color"},
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{"osd_border_color", "osd_borders_color", "osd_fg_color"},
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{"menubar_bg_color", "menubar_bg_color", "bg_color"},
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{"menubar_fg_color", "menubar_fg_color", "fg_color"},
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--
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{"button_bg_color", "button_bg_color", "bg_color"},
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{"button_fg_color", "button_fg_color", "fg_color"},
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{"header_button_bg_color", "header_button_bg_color", "menubar_bg_color"},
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{"header_button_fg_color", "header_button_fg_color", "menubar_fg_color"},
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--
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{"wm_bg_color", "wm_bg", "menubar_bg_color"},
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{"wm_border_focused_color", "wm_border_focused", "selected_bg_color"},
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{"wm_border_unfocused_color", "wm_border_unfocused", "wm_border", "menubar_bg_color"},
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{"wm_title_focused_color", "wm_title_focused", "wm_title", "selected_fg_color"},
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{"wm_title_unfocused_color", "wm_title_unfocused", "wm_unfocused_title", "menubar_fg_color"},
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{"wm_icons_focused_color", "wm_icons_focused", "wm_title_focused_color", "selected_fg_color"},
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{"wm_icons_unfocused_color", "wm_icons_unfocused", "wm_title_unfocused_color", "menubar_fg_color"},
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--
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{"error_color", "error_color"},
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{"error_bg_color", "error_bg_color", "error_color"},
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{"error_fg_color", "error_fg_color", "selected_fg_color"},
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{"error_color", "error_color", "error_bg_color"},
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{"warning_color", "warning_color"},
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{"warning_bg_color", "warning_bg_color", "warning_color"},
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{"warning_fg_color", "warning_fg_color", "selected_fg_color"},
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{"warning_color", "warning_color", "warning_bg_color"},
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{"success_color", "success_color"},
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{"success_bg_color", "success_bg_color", "success_color"},
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{"success_fg_color", "success_fg_color", "selected_fg_color"},
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{"success_color", "success_color", "success_bg_color"},
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}) do
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local result_key, style_context_key, fallback_key, fallback_key2 = unpack(color_data)
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result[result_key] = lookup_gtk_color_to_hex(style_context, style_context_key) or (
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result[result_key] ~= "#00000000" and
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result[result_key] or
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result[fallback_key] or
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result[fallback_key2] or
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result[result_key] -- <-- here is for case if it was meant to be a fully transparent color on purpose
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)
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if not result[result_key] then
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gears_debug.print_warning("Can't read color '" .. style_context_key .. "' from GTK+3 theme.")
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end
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end
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window:destroy()
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gtk.cached_theme_variables = result
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return result
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end
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return gtk
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