Fix theme parser errors

src/sass/Makefile

@@ -6,6 +6,17 @@ THEMES_DIR=../../themes/
 
 build: clean
 	$(MAKE) $(TARGETS)
+
+	# Replace conditional stuff. For example, see the definition
+	# for "flowboxchild:selected image" in nautilus/Adwaita.css.
+	# The way this works is we have an existing commented line
+	# which ends with the embedded comment "* Make: GTK3 only */"
+	# for GTK 3 (and 4 for GTK4). Note the missing starting slash,
+	# that's because we can't have nested comments in CSS for some
+	# reason. We need to add it ourselves when uncommenting line.
+	ls gtk3-*.css | xargs sed -i 's|^\(\s*\)\(/\*\)\(.*\)\(\* Make: GTK3 only \*/\)$$|\1\3/\4|'
+	ls gtk4-*.css | xargs sed -i 's|^\(\s*\)\(/\*\)\(.*\)\(\* Make: GTK4 only \*/\)$$|\1\3/\4|'
+
 	for COLOR in $(COLOR_VARIANTS); \
 	do \
 	  mkdir -p $(foreach VARIANT,Light Dark Darkest,$(THEMES_DIR)Flat-Remix-GTK-$$COLOR-$(VARIANT)/gtk-3.0/); \

src/sass/gtk-applications-css/gedit/Adwaita.css

@@ -19,7 +19,7 @@
 
 /* Only normal state is handle */
 .open-document-selector-match {
-    color: shade (@theme_fg_color, 0.6);
+    color: shade(@theme_fg_color, 0.6);
     background-color: alpha(@warning_color, 0.4);
 }
 
@@ -79,7 +79,7 @@ statusbar {
 .gedit-search-entry-occurrences-tag {
     background-color: @theme_base_color;
     background-image: none;
-    color: shade (@theme_unfocused_fg_color, 0.8);
+    color: shade(@theme_unfocused_fg_color, 0.8);
     border: 0px;
     margin: 2px;
     padding: 2px;

src/sass/gtk-applications-css/nautilus/Adwaita.css

@@ -20,11 +20,11 @@
 }
 
 .nautilus-canvas-item.dim-label {
-    color: mix (@theme_fg_color, @theme_bg_color, 0.50);
+    color: mix(@theme_fg_color, @theme_bg_color, 0.50);
 }
 
 .nautilus-canvas-item.dim-label:selected {
-    color: mix (@theme_selected_fg_color, @theme_selected_bg_color, 0.20);
+    color: mix(@theme_selected_fg_color, @theme_selected_bg_color, 0.20);
 }
 
 /* Toolbar */
@@ -225,7 +225,7 @@ entry.search > * {
 
 /* Icon view */
 flowbox {
-  padding: 18px
+  padding: 18px;
 }
 
 flowboxchild {
@@ -256,9 +256,8 @@ flowboxchild:selected .icon-ui-labels-box {
 }
 
 flowboxchild:selected image {
-  -gtk-icon-effect: dim; /* GTK 3 only */
-  /* GTK 4 TODO: Replace previous line with the following one:
-  -gtk-icon-filter: opacity(0.5);
-  */
   -gtk-icon-shadow: 0px 0px @theme_selected_bg_color;
+  /* In the Makefile, we will uncomment the following appropriately. */
+  /* -gtk-icon-effect: dim;  * Make: GTK3 only */
+  /* -gtk-icon-filter: opacity(0.5);  * Make: GTK4 only */
 }

src/templates/static/gtk-2.0/main.rc

@@ -127,7 +127,7 @@ style "default" {
   text[ACTIVE]      = @selected_fg_color
 
   base[NORMAL]      = @base_color
-  base[PRELIGHT]    = shade (0.95, @bg_color)
+  base[PRELIGHT]    = shade(0.95, @bg_color)
   base[SELECTED]    = @selected_bg_color
   base[INSENSITIVE] = @insensitive_bg_color
   base[ACTIVE]      = @selected_bg_color