From 1150c87edb7478af6cc943eb0ef52fdf3051c121 Mon Sep 17 00:00:00 2001
From: Jeremy Ruston <jeremy@jermolene.com>
Date: Mon, 16 Sep 2019 16:15:26 +0100
Subject: [PATCH] Add [is[binary]] operator

---
 core/modules/wiki.js                     | 10 ++++++++++
 editions/tw5.com/tiddlers/filters/is.tid |  3 ++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/core/modules/wiki.js b/core/modules/wiki.js
index c531440a3..e7f84e13c 100755
--- a/core/modules/wiki.js
+++ b/core/modules/wiki.js
@@ -221,6 +221,16 @@ exports.isImageTiddler = function(title) {
 	}
 };
 
+exports.isBinaryTiddler = function(title) {
+	var tiddler = this.getTiddler(title);
+	if(tiddler) {		
+		var contentTypeInfo = $tw.config.contentTypeInfo[tiddler.fields.type || "text/vnd.tiddlywiki"];
+		return !!contentTypeInfo && contentTypeInfo.encoding === "base64";
+	} else {
+		return null;
+	}
+};
+
 /*
 Like addTiddler() except it will silently reject any plugin tiddlers that are older than the currently loaded version. Returns true if the tiddler was imported
 */
diff --git a/editions/tw5.com/tiddlers/filters/is.tid b/editions/tw5.com/tiddlers/filters/is.tid
index bec256edf..b18dffe42 100644
--- a/editions/tw5.com/tiddlers/filters/is.tid
+++ b/editions/tw5.com/tiddlers/filters/is.tid
@@ -1,5 +1,5 @@
 created: 20140410103123179
-modified: 20190225130632157
+modified: 20190916151432497
 tags: [[Filter Operators]] [[Common Operators]] [[Negatable Operators]]
 title: is Operator
 type: text/vnd.tiddlywiki
@@ -16,6 +16,7 @@ The parameter <<.place C>> is one of the following fundamental categories:
 |!Category |!Matches any tiddler title that... |
 |^`current` |is the [[current tiddler|Current Tiddler]] |
 |^`image` |has an image ContentType |
+|^`binary` |has a binary ContentType |
 |^`missing` |does not exist (other than possibly as a shadow tiddler), regardless of whether there are any links to it |
 |^`orphan` |has no [[hard links|Hard and Soft Links]] to it |
 |^`shadow` |is a [[shadow tiddler|ShadowTiddlers]], regardless of whether it has been overridden with a non-shadow tiddler |