From dcc293e7e7262991464f0d509e529ed8a1f4efb7 Mon Sep 17 00:00:00 2001
From: Paul Warren <pdw@ex-parrot.com>
Date: Tue, 5 Sep 2023 17:54:25 +0100
Subject: [PATCH 1/2] Show "Concealed fact" tag on transparent facts.

---
 iXBRLViewerPlugin/viewer/src/js/ixnode.js |  4 +++-
 iXBRLViewerPlugin/viewer/src/js/util.js   | 11 +++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/iXBRLViewerPlugin/viewer/src/js/ixnode.js b/iXBRLViewerPlugin/viewer/src/js/ixnode.js
index 5985eabee..34120dee9 100644
--- a/iXBRLViewerPlugin/viewer/src/js/ixnode.js
+++ b/iXBRLViewerPlugin/viewer/src/js/ixnode.js
@@ -1,5 +1,7 @@
 // See COPYRIGHT.md for copyright information
 
+import $ from 'jquery';
+import { isTransparent } from './util.js';
 
 /*
  * Object to hold information related to iXBRL nodes in the HTML document.
@@ -44,6 +46,6 @@ export class IXNode {
     }
 
     htmlHidden() {
-        return this.wrapperNodes.is(':hidden');
+        return this.wrapperNodes.is(':hidden') || this.wrapperNodes.filter((i,e) => isTransparent($(e).css('color'))).length > 0;
     }
 }
diff --git a/iXBRLViewerPlugin/viewer/src/js/util.js b/iXBRLViewerPlugin/viewer/src/js/util.js
index 4e4c49546..c571b590d 100644
--- a/iXBRLViewerPlugin/viewer/src/js/util.js
+++ b/iXBRLViewerPlugin/viewer/src/js/util.js
@@ -149,3 +149,14 @@ export function titleCase(text) {
                 .join('');
     }).join(' ');
 }
+
+/**
+ * Extract the alpha value from an rgba(r,g,b,a) string and returns true if
+ * transparent (a < 10%).  Returns false on rgb(r,g,b) strings.
+ * @param  {String}  rgba   color string to parse
+ * @return {Boolean} whether the value is transparent
+ */
+export function isTransparent(rgba) {
+    const val = parseFloat(rgba.split(",")[3]);
+    return !isNaN(val) && val < 0.1;
+}

From 2a4672883735e9a22edbf408d1f4109ecd41a307 Mon Sep 17 00:00:00 2001
From: Paul Warren <pdw@ex-parrot.com>
Date: Wed, 6 Sep 2023 22:56:11 +0100
Subject: [PATCH 2/2] Replace .filter() with .is()

---
 iXBRLViewerPlugin/viewer/src/js/ixnode.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/iXBRLViewerPlugin/viewer/src/js/ixnode.js b/iXBRLViewerPlugin/viewer/src/js/ixnode.js
index 34120dee9..41a81c6ee 100644
--- a/iXBRLViewerPlugin/viewer/src/js/ixnode.js
+++ b/iXBRLViewerPlugin/viewer/src/js/ixnode.js
@@ -46,6 +46,6 @@ export class IXNode {
     }
 
     htmlHidden() {
-        return this.wrapperNodes.is(':hidden') || this.wrapperNodes.filter((i,e) => isTransparent($(e).css('color'))).length > 0;
+        return this.wrapperNodes.is(':hidden') || this.wrapperNodes.is((i,e) => isTransparent($(e).css('color')));
     }
 }