Migrate lang attributes to iframe documents

Also detect and use both lang and xml:lang
Arelle · Nov 20, 2024 · 0c10844 · 0c10844
1 parent 36b6910
commit 0c10844
Showing 1 changed file with 19 additions and 6 deletions.
diff --git a/iXBRLViewerPlugin/viewer/src/js/ixbrlviewer.js b/iXBRLViewerPlugin/viewer/src/js/ixbrlviewer.js
@@ -156,9 +156,6 @@ export class iXBRLViewer {
         else {
             docTitle = "Inline Viewer";
         }
-        if ($('html').attr("lang") === undefined) {
-            $('html').attr("lang", "en-US");
-        }
 
         $('head').children().not("script").not("style#ixv-style").not("link#ixv-favicon").appendTo($(iframe).contents().find('head'));
 
@@ -235,7 +232,7 @@ export class iXBRLViewer {
 
             if (!stubViewer) {
                 iframes = $(iv._reparentDocument());
-            } 
+            }
             const ds = reportSet.reportFiles();
             let hasExternalIframe = false;
             for (let i = stubViewer ? 0 : 1; i < ds.length; i++) {
@@ -252,15 +249,31 @@ export class iXBRLViewer {
                 /* Poll for iframe load completing - there doesn't seem to be a reliable event that we can use */
                 let timer = setInterval(function () {
                     let complete = true;
-                    iframes.each(function (n) {
-                        const iframe = this;
+                    iframes.each((n, iframe) => {
                         const iframeDoc = iframe.contentDocument || iframe.contentWindow.document;
                         if ((iframeDoc.readyState != 'complete' && iframeDoc.readyState != 'interactive') || $(iframe).contents().find("body").children().length == 0) {
                             complete = false;
                         }
                     });
                     if (complete) {
                         clearInterval(timer);
+                        const html = $('html');
+                        const lang = html.attr('lang') || html.attr('xml:lang');
+                        // Remove any report language from the application html node.
+                        html.removeAttr('lang');
+                        html.removeAttr('xml:lang');
+                        iframes.each((n, iframe) => {
+                            const iframeDoc = iframe.contentDocument || iframe.contentWindow.document;
+                            const iframeHtml = $(iframeDoc).find('html');
+                            let frameLang = iframeHtml.attr('lang') || iframeHtml.attr('xml:lang');
+                            if (frameLang === undefined) {
+                                frameLang = lang;
+                            }
+                            if (frameLang !== undefined) {
+                                // Try to set the language of the iframe to the language of the report.
+                                iframeHtml.attr({'lang': frameLang, 'xml:lang': frameLang});
+                            }
+                        });
 
                         const viewer = iv.viewer = new Viewer(iv, iframes, reportSet);