1 files changed, 0 insertions, 131 deletions
diff --git a/themes/hugo-theme-stack/assets/ts/scrollspy.ts b/themes/hugo-theme-stack/assets/ts/scrollspy.ts
deleted file mode 100644
index 8a14085..0000000
--- a/themes/hugo-theme-stack/assets/ts/scrollspy.ts
+++ /dev/null
@@ -1,131 +0,0 @@
-// Implements a scroll spy system for the ToC, displaying the current section with an indicator and scrolling to it when needed.
-
-// Inspired from https://gomakethings.com/debouncing-your-javascript-events/
-function debounced(func: Function) {
-    let timeout;
-    return () => {
-        if (timeout) {
-            window.cancelAnimationFrame(timeout);
-        }
-
-        timeout = window.requestAnimationFrame(() => func());
-    }
-}
-
-const headersQuery = ".article-content h1[id], .article-content h2[id], .article-content h3[id], .article-content h4[id], .article-content h5[id], .article-content h6[id]";
-const tocQuery = "#TableOfContents";
-const navigationQuery = "#TableOfContents li";
-const activeClass = "active-class";
-
-function scrollToTocElement(tocElement: HTMLElement, scrollableNavigation: HTMLElement) {
-    let textHeight = tocElement.querySelector("a").offsetHeight;
-    let scrollTop = tocElement.offsetTop - scrollableNavigation.offsetHeight / 2 + textHeight / 2 - scrollableNavigation.offsetTop;
-    if (scrollTop < 0) {
-        scrollTop = 0;
-    }
-    scrollableNavigation.scrollTo({ top: scrollTop, behavior: "smooth" });
-}
-
-type IdToElementMap = { [key: string]: HTMLElement };
-
-function buildIdToNavigationElementMap(navigation: NodeListOf<Element>): IdToElementMap {
-    const sectionLinkRef: IdToElementMap = {};
-    navigation.forEach((navigationElement: HTMLElement) => {
-        const link = navigationElement.querySelector("a");
-        const href = link.getAttribute("href");
-        if (href.startsWith("#")) {
-            sectionLinkRef[href.slice(1)] = navigationElement;
-        }
-    });
-
-    return sectionLinkRef;
-}
-
-function computeOffsets(headers: NodeListOf<Element>) {
-    let sectionsOffsets = [];
-    headers.forEach((header: HTMLElement) => { sectionsOffsets.push({ id: header.id, offset: header.offsetTop }) });
-    sectionsOffsets.sort((a, b) => a.offset - b.offset);
-    return sectionsOffsets;
-}
-
-function setupScrollspy() {
-    let headers = document.querySelectorAll(headersQuery);
-    if (!headers) {
-        console.warn("No header matched query", headers);
-        return;
-    }
-
-    let scrollableNavigation = document.querySelector(tocQuery) as HTMLElement | undefined;
-    if (!scrollableNavigation) {
-        console.warn("No toc matched query", tocQuery);
-        return;
-    }
-
-    let navigation = document.querySelectorAll(navigationQuery);
-    if (!navigation) {
-        console.warn("No navigation matched query", navigationQuery);
-        return;
-    }
-
-    let sectionsOffsets = computeOffsets(headers);
-
-    // We need to avoid scrolling when the user is actively interacting with the ToC. Otherwise, if the user clicks on a link in the ToC,
-    // we would scroll their view, which is not optimal usability-wise.
-    let tocHovered: boolean = false;
-    scrollableNavigation.addEventListener("mouseenter", debounced(() => tocHovered = true));
-    scrollableNavigation.addEventListener("mouseleave", debounced(() => tocHovered = false));
-
-    let activeSectionLink: Element;
-
-    let idToNavigationElement: IdToElementMap = buildIdToNavigationElementMap(navigation);
-
-    function scrollHandler() {
-        let scrollPosition = document.documentElement.scrollTop || document.body.scrollTop;
-
-        let newActiveSection: HTMLElement | undefined;
-
-        // Find the section that is currently active.
-        // It is possible for no section to be active, so newActiveSection may be undefined.
-        sectionsOffsets.forEach((section) => {
-            if (scrollPosition >= section.offset - 20) {
-                newActiveSection = document.getElementById(section.id);
-            }
-        });
-
-        // Find the link for the active section. Once again, there are a few edge cases:
-        // - No active section = no link => undefined
-        // - No active section but the link does not exist in toc (e.g. because it is outside of the applicable ToC levels) => undefined
-        let newActiveSectionLink: HTMLElement | undefined
-        if (newActiveSection) {
-            newActiveSectionLink = idToNavigationElement[newActiveSection.id];
-        }
-
-        if (newActiveSection && !newActiveSectionLink) {
-            // The active section does not have a link in the ToC, so we can't scroll to it.
-            console.debug("No link found for section", newActiveSection);
-        } else if (newActiveSectionLink !== activeSectionLink) {
-            if (activeSectionLink)
-                activeSectionLink.classList.remove(activeClass);
-            if (newActiveSectionLink) {
-                newActiveSectionLink.classList.add(activeClass);
-                if (!tocHovered) {
-                    // Scroll so that newActiveSectionLink is in the middle of scrollableNavigation, except when it's from a manual click (hence the tocHovered check)
-                    scrollToTocElement(newActiveSectionLink, scrollableNavigation);
-                }
-            }
-            activeSectionLink = newActiveSectionLink;
-        }
-    }
-
-    window.addEventListener("scroll", debounced(scrollHandler));
-    
-    // Resizing may cause the offset values to change: recompute them.
-    function resizeHandler() {
-        sectionsOffsets = computeOffsets(headers);
-        scrollHandler();
-    }
-
-    window.addEventListener("resize", debounced(resizeHandler));
-}
-
-export { setupScrollspy };
-\ No newline at end of file