From 7dffd08c1a068e5e0748a046fd8a1e884947b597 Mon Sep 17 00:00:00 2001
From: v-rob <robinsonvincent89@gmail.com>
Date: Sun, 1 Mar 2020 06:39:57 -0800
Subject: [PATCH] Add multiple element selection to `style` and `style_type`
 (#9380)

---
 doc/lua_api.txt                      | 17 +++++++++++------
 games/minimal/mods/test/formspec.lua | 15 +++------------
 src/gui/guiFormSpecMenu.cpp          | 26 +++++++++++++++-----------
 3 files changed, 29 insertions(+), 29 deletions(-)

diff --git a/doc/lua_api.txt b/doc/lua_api.txt
index 6ff7f802a..4b7132828 100644
--- a/doc/lua_api.txt
+++ b/doc/lua_api.txt
@@ -2495,16 +2495,16 @@ Elements
         * `span=<value>`: number of following columns to affect
           (default: infinite).
 
-### `style[<name>;<prop1>;<prop2>;...]`
+### `style[<name 1>,<name 2>,...;<prop1>;<prop2>;...]`
 
-* Set the style for the named element `name`.
+* Set the style for the named element(s) `name`.
 * Note: this **must** be before the element is defined.
 * See [Styling Formspecs].
 
 
-### `style_type[<type>;<prop1>;<prop2>;...]`
+### `style_type[<type 1>,<type 2>,...;<prop1>;<prop2>;...]`
 
-* Sets the style for all elements of type `type` which appear after this element.
+* Sets the style for all elements of type(s) `type` which appear after this element.
 * See [Styling Formspecs].
 
 Migrating to Real Coordinates
@@ -2547,13 +2547,18 @@ Styling Formspecs
 
 Formspec elements can be themed using the style elements:
 
-    style[<name>;<prop1>;<prop2>;...]
-    style_type[<type>;<prop1>;<prop2>;...]
+    style[<name 1>,<name 2>,...;<prop1>;<prop2>;...]
+    style_type[<type 1>,<type 2>,...;<prop1>;<prop2>;...]
 
 Where a prop is:
 
     property_name=property_value
 
+A name/type can optionally be a comma separated list of names/types, like so:
+
+    world_delete,world_create,world_configure
+    button,image_button
+
 For example:
 
     style_type[button;bgcolor=#006699]
diff --git a/games/minimal/mods/test/formspec.lua b/games/minimal/mods/test/formspec.lua
index 50c506899..a836a811d 100644
--- a/games/minimal/mods/test/formspec.lua
+++ b/games/minimal/mods/test/formspec.lua
@@ -1,18 +1,9 @@
 local color = minetest.colorize
 
 local clip_fs = [[
-	style_type[label;noclip=%c]
-	style_type[button;noclip=%c]
-	style_type[image_button;noclip=%c]
-	style_type[item_image_button;noclip=%c]
-	style_type[tabheader;noclip=%c]
-	style_type[field;noclip=%c]
-	style_type[textarea;noclip=%c]
-	style_type[checkbox;noclip=%c]
-	style_type[dropdown;noclip=%c]
-	style_type[scrollbar;noclip=%c]
-	style_type[table;noclip=%c]
-	style_type[animated_image;noclip=%c]
+	style_type[label,button,image_button,item_image_button,
+			tabheader,scrollbar,table,animated_image
+			,field,textarea,checkbox,dropdown;noclip=%c]
 
 	label[0,0;A clipping test]
 	button[0,1;3,0.8;x;A clipping test]
diff --git a/src/gui/guiFormSpecMenu.cpp b/src/gui/guiFormSpecMenu.cpp
index 40c3bbdae..d892555b3 100644
--- a/src/gui/guiFormSpecMenu.cpp
+++ b/src/gui/guiFormSpecMenu.cpp
@@ -2450,13 +2450,6 @@ bool GUIFormSpecMenu::parseStyle(parserData *data, const std::string &element, b
 		return false;
 	}
 
-	std::string selector = trim(parts[0]);
-	if (selector.empty()) {
-		errorstream << "Invalid style element (Selector required): '" << element
-					<< "'" << std::endl;
-		return false;
-	}
-
 	StyleSpec spec;
 
 	for (size_t i = 1; i < parts.size(); i++) {
@@ -2486,10 +2479,21 @@ bool GUIFormSpecMenu::parseStyle(parserData *data, const std::string &element, b
 		spec.set(prop, value);
 	}
 
-	if (style_type) {
-		theme_by_type[selector] |= spec;
-	} else {
-		theme_by_name[selector] |= spec;
+	std::vector<std::string> selectors = split(parts[0], ',');
+	for (size_t sel = 0; sel < selectors.size(); sel++) {
+		std::string selector = trim(selectors[sel]);
+
+		if (selector.empty()) {
+			errorstream << "Invalid style element (Empty selector): '" << element
+				<< "'" << std::endl;
+			continue;
+		}
+
+		if (style_type) {
+			theme_by_type[selector] |= spec;
+		} else {
+			theme_by_name[selector] |= spec;
+		}
 	}
 
 	return true;
-- 
2.25.1