widget: Fix saving a widget to a file.

Previously, if `beautiful.fg_normal` wasn't black, it would not render
correctly.

build-utils/check_for_invalid_requires.lua

@@ -62,7 +62,10 @@ local allowed_deps = {
         naughty = true,
     },
     -- TODO: Get rid of these
-    ["gears.surface"]        = { ["wibox.hierarchy"] = true },
+    ["gears.surface"]        = {
+        ["wibox.hierarchy"] = true,
+        beautiful = true,
+    },
 }
 
 -- Turn "foo.bar.baz" into "foo.bar". Returns nil if there is nothing more to

lib/gears/surface.lua

@@ -9,7 +9,7 @@ local type = type
 local capi = { awesome = awesome }
 local cairo = require("lgi").cairo
 local GdkPixbuf = require("lgi").GdkPixbuf
-local color = nil
+local color, beautiful = nil, nil
 local gdebug = require("gears.debug")
 local hierarchy = require("wibox.hierarchy")
 
@@ -232,7 +232,7 @@ end
 --- Create an SVG file with this widget content.
 -- This is dynamic, so the SVG will be updated along with the widget content.
 -- because of this, the painting may happen hover multiple event loop cycles.
--- @deprecated draw_to_svg_file
+-- @deprecated widget_to_svg
 -- @tparam widget widget A widget
 -- @tparam string path The output file path
 -- @tparam number width The surface width
@@ -243,17 +243,22 @@ end
 -- @see wibox.widget.draw_to_image_surface
 function surface.widget_to_svg(widget, path, width, height)
     gdebug.deprecate("Use wibox.widget.draw_to_svg_file instead of "..
-        "gears.surface.render_to_svg", {deprecated_in=5})
+        "gears.surface.widget_to_svg", {deprecated_in=5})
     local img = cairo.SvgSurface.create(path, width, height)
     local cr = cairo.Context(img)
 
+    -- Bad dependecy, but this is deprecated.
+    beautiful = beautiful or require("beautiful")
+    color = color or require("gears.color")
+    cr:set_source(color(beautiful.fg_normal))
+
     return img, run_in_hierarchy(widget, cr, width, height)
 end
 
 --- Create a cairo surface with this widget content.
 -- This is dynamic, so the SVG will be updated along with the widget content.
 -- because of this, the painting may happen hover multiple event loop cycles.
--- @deprecated draw_to_image_surface
+-- @deprecated widget_to_surface
 -- @tparam widget widget A widget
 -- @tparam number width The surface width
 -- @tparam number height The surface height
@@ -268,6 +273,11 @@ function surface.widget_to_surface(widget, width, height, format)
     local img = cairo.ImageSurface(format or cairo.Format.ARGB32, width, height)
     local cr = cairo.Context(img)
 
+    -- Bad dependecy, but this is deprecated.
+    color = color or require("gears.color")
+    beautiful = beautiful or require("beautiful")
+    cr:set_source(color(beautiful.fg_normal))
+
     return img, run_in_hierarchy(widget, cr, width, height)
 end
 

lib/wibox/widget/init.lua

@@ -6,6 +6,8 @@
 
 local cairo = require("lgi").cairo
 local hierarchy = require("wibox.hierarchy")
+local gcolor = require("gears.color")
+local beautiful = nil
 
 local widget = {
     base = require("wibox.widget.base");
@@ -55,6 +57,10 @@ end
 function widget.draw_to_svg_file(wdg, path, width, height, context)
     local img = cairo.SvgSurface.create(path, width, height)
     local cr = cairo.Context(img)
+
+    beautiful = beautiful or require("beautiful")
+    cr:set_source(gcolor(beautiful.fg_normal))
+
     widget.draw_to_cairo_context(wdg, cr, width, height, context)
     img:finish()
 end
@@ -70,6 +76,10 @@ end
 function widget.draw_to_image_surface(wdg, width, height, format, context)
     local img = cairo.ImageSurface(format or cairo.Format.ARGB32, width, height)
     local cr = cairo.Context(img)
+
+    beautiful = beautiful or require("beautiful")
+    cr:set_source(gcolor(beautiful.fg_normal))
+
     widget.draw_to_cairo_context(wdg, cr, width, height, context)
     return img
 end