1 files changed, 54 insertions, 0 deletions
diff --git a/freetype/docs/reference/javascripts/extra.js b/freetype/docs/reference/javascripts/extra.js
new file mode 100644
index 000000000..00f167089
--- /dev/null
+++ b/freetype/docs/reference/javascripts/extra.js
@@ -0,0 +1,54 @@
+/*
+Internal link topbar offest adjust Javascript
+Code provided by @makshh on GitHub
+
+Bug report on material-mkdocs
+  https://github.com/squidfunk/mkdocs-material/issues/791
+*/
+
+// Offset top helper
+function offsetY(elem) {
+    if(!elem) elem = this;
+    var y = elem.offsetTop;
+    while (elem = elem.offsetParent) {
+        y += elem.offsetTop;
+    }
+    return y;
+}
+
+// If a link on the same page is clicked, calculate the
+// correct offset and scroll to that part of the page.
+//
+var links = document.getElementsByTagName('a');
+for(var i = 0; i < links.length; i++) {
+    links[i].onclick = function (event) {
+        if (this.pathname == window.location.pathname &&
+            this.protocol == window.location.protocol &&
+            this.host == window.location.host) {
+                event.preventDefault();
+                if(this.hash.substr(1)){
+                    var o = document.getElementById(this.hash.substr(1));
+                    var sT = offsetY(o) - document.getElementsByClassName('md-header')[0].clientHeight;
+                    window.location.hash = this.hash;
+                    window.scrollTo(0, sT);
+                }
+        }
+    }
+}
+
+// Slugify supplied text
+function slugify(text){
+    text = text.toLowerCase();
+    text = text.replace(" ", "-");
+    return text;
+}
+
+// If there is a hash in the url, slugify it
+// and replace
+if(window.location.hash) {
+    // Fragment exists
+    slug = slugify(window.location.hash);
+    history.replaceState(undefined, undefined, slug)
+    //window.location.hash = slug;
+    document.location.replace(window.location.href);
+}