From 546e438943ca1930b25037788aa8c59cc0a552cc Mon Sep 17 00:00:00 2001
From: Jeremy Ruston <jeremy@jermolene.com>
Date: Mon, 27 Jan 2025 21:45:17 +0000
Subject: [PATCH] Allow background actions to be scoped by platform

---
 core/modules/background-actions.js            | 28 +++++++++++++------
 .../wiki/SampleBackgroundAction Dark Mode.tid |  3 +-
 .../background-actions/AutoCompilePalette.tid |  4 ++-
 3 files changed, 25 insertions(+), 10 deletions(-)

diff --git a/core/modules/background-actions.js b/core/modules/background-actions.js
index 95b4a611e..bfeb03338 100644
--- a/core/modules/background-actions.js
+++ b/core/modules/background-actions.js
@@ -90,15 +90,27 @@ function BackgroundActionTracker(options) {
 		fnProcess: function(changes) {
 			if(self.hasChanged) {
 				self.hasChanged = false;
-				self.wiki.invokeActionString(
-					self.actions,
-					null,
-					{
-						title: self.title
-					},{
-						parentWidget: $tw.rootWidget
+				console.log("Processing background action",self.title);
+				var tiddler = self.wiki.getTiddler(self.title),
+					doActions = true;
+				if(tiddler && tiddler.fields.platforms) {
+					doActions = false;
+					var platforms = $tw.utils.parseStringArray(tiddler.fields.platforms);
+					if(($tw.browser && platforms.indexOf("browser") !== -1) || ($tw.node && platforms.indexOf("node") !== -1)) {
+						doActions = true;
 					}
-				);
+				}
+				if(doActions) {
+					self.wiki.invokeActionString(
+						self.actions,
+						null,
+						{
+							title: self.title
+						},{
+							parentWidget: $tw.rootWidget
+						}
+					);
+				}
 			}
 		}
 	});
diff --git a/core/wiki/SampleBackgroundAction Dark Mode.tid b/core/wiki/SampleBackgroundAction Dark Mode.tid
index 47bd44734..34c41c5ce 100644
--- a/core/wiki/SampleBackgroundAction Dark Mode.tid	
+++ b/core/wiki/SampleBackgroundAction Dark Mode.tid	
@@ -1,5 +1,6 @@
 title: SampleBackgroundAction: Dark Mode
-tags: $:/tags/BackgroundAction  $:/tags/StartupAction
+tags: $:/tags/BackgroundAction $:/tags/StartupAction/Browser
+platforms: browser
 track-filter: [{$:/info/browser/darkmode}]
 
 <%if [{$:/info/browser/darkmode}match[no]] %>
diff --git a/core/wiki/background-actions/AutoCompilePalette.tid b/core/wiki/background-actions/AutoCompilePalette.tid
index 112ae9135..21b9bdfd5 100644
--- a/core/wiki/background-actions/AutoCompilePalette.tid
+++ b/core/wiki/background-actions/AutoCompilePalette.tid
@@ -1,6 +1,8 @@
 title: $:/core/background-actions/AutoCompilePalette
 tags: $:/tags/BackgroundAction $:/tags/StartupAction
-track-filter: [[$:/palette]] +[changecount[]]
+platforms: browser
+track-filter: [[$:/palette]] +[changecount[]] 
 
 \import [subfilter{$:/core/config/GlobalImportFilter}]
+<$action-log $message="AutoCompilePalette" darkmode={{$:/info/browser/darkmode}} palette={{$:/palette}}/>
 <<actions-recompile-current-palette>>