E-book viewer: Workaround to display images that have been embedded in svg containers. Fixes #4716 (Unable to view ePUB cover images in calibre viewer)

resources/viewer/images.js

@@ -20,4 +20,20 @@ function setup_image_scaling_handlers() {
    });
 }
 
+function extract_svged_images() {
+    $("svg").each(function() {
+        var children = $(this).children("img");
+        if (children.length == 1) {
+            var img = $(children[0]);
+            var href = img.attr('xlink:href');
+            if (href != undefined) {
+                $(this).replaceWith('<div style="text-align:center; margin: 0; padding: 0"><img style="height: 98%" alt="SVG Image" src="' + href +'"></img></div>');
+            }
+        }
+    });
+}
+
+$(document).ready(function() {
+   extract_svged_images();
+});