From df81012e289808a866d9346905d65eea5eefe0be Mon Sep 17 00:00:00 2001 From: Cotes Chung <11371340+cotes2020@users.noreply.github.com> Date: Wed, 8 Dec 2021 17:07:18 +0800 Subject: [PATCH] Always close the top bar when smooth scrolling --- _javascript/commons/topbar-switch.js | 58 ++++++++++++++-------------- _javascript/utils/smooth-scroll.js | 36 +++++++++++++---- _sass/addon/commons.scss | 8 ++-- _sass/layout/post.scss | 5 --- assets/js/dist/categories.min.js | 2 +- assets/js/dist/commons.min.js | 2 +- assets/js/dist/home.min.js | 2 +- assets/js/dist/page.min.js | 2 +- assets/js/dist/post.min.js | 2 +- 9 files changed, 67 insertions(+), 50 deletions(-) diff --git a/_javascript/commons/topbar-switch.js b/_javascript/commons/topbar-switch.js index 55fbab6..1740d1f 100644 --- a/_javascript/commons/topbar-switch.js +++ b/_javascript/commons/topbar-switch.js @@ -3,50 +3,50 @@ */ $(function() { + const $topbarWrapper = $("#topbar-wrapper"); + const $panel = $("#panel-wrapper"); + const $searchInput = $("#search-input"); - const topbarWrapper = $("#topbar-wrapper"); - const toc = $("#toc-wrapper"); - const access = $(".access"); - const searchInput = $("#search-input"); + const CLASS_TOPBAR_UP = "topbar-up"; + const CLASS_TOPBAR_DOWN = "topbar-down"; + const ATTR_TOC_SCROLLING_UP = "toc-scrolling-up"; // topbar locked let didScroll; let lastScrollTop = 0; - const delta = 5; - const topbarHeight = topbarWrapper.outerHeight(); + const delta = $topbarWrapper.outerHeight(); + const topbarHeight = $topbarWrapper.outerHeight(); function hasScrolled() { - var st = $(this).scrollTop(); + let st = $(this).scrollTop(); /* Make sure they scroll more than delta */ if (Math.abs(lastScrollTop - st) <= delta) { return; } - if (st > lastScrollTop && st > topbarHeight) { - /* Scroll Down */ - topbarWrapper.removeClass("topbar-down").addClass("topbar-up"); + if (st > lastScrollTop ) { // Scroll Down + if (st > topbarHeight) { + $topbarWrapper.removeClass(CLASS_TOPBAR_DOWN).addClass(CLASS_TOPBAR_UP); + $panel.removeClass(CLASS_TOPBAR_DOWN); - if (toc.length > 0) { - toc.removeClass("topbar-down"); + if ($searchInput.is(":focus")) { + $searchInput.blur(); /* remove focus */ + } } + } else {// Scroll up + // did not reach the bottom of the document, i.e., still have space to scroll up + if (st + $(window).height() < $(document).height()) { + let tocScrollingUp = $topbarWrapper.attr(ATTR_TOC_SCROLLING_UP); + if (typeof tocScrollingUp !== "undefined") { + if (tocScrollingUp === "false") { + $topbarWrapper.removeAttr(ATTR_TOC_SCROLLING_UP); + } - if (access.length > 0) { - access.removeClass("topbar-down"); - } - - if (searchInput.is(":focus")) { - searchInput.blur(); /* remove focus */ - } - - } else if (st + $(window).height() < $(document).height()) { - /* Scroll Up */ - topbarWrapper.removeClass("topbar-up").addClass("topbar-down"); - if (toc.length > 0) { - toc.addClass("topbar-down"); - } - if (access.length > 0) { - access.addClass("topbar-down"); + } else { + $topbarWrapper.removeClass(CLASS_TOPBAR_UP).addClass(CLASS_TOPBAR_DOWN); + $panel.addClass(CLASS_TOPBAR_DOWN); + } } } @@ -54,7 +54,7 @@ $(function() { } $(window).scroll(function(event) { - if ($("#topbar-title").is(":hidden")) { /* Not in small screens */ + if ($("#topbar-title").is(":hidden")) { didScroll = true; } }); diff --git a/_javascript/utils/smooth-scroll.js b/_javascript/utils/smooth-scroll.js index 6ddf96d..2d41988 100644 --- a/_javascript/utils/smooth-scroll.js +++ b/_javascript/utils/smooth-scroll.js @@ -8,15 +8,19 @@ */ $(function() { + const $topbarWrapper = $("#topbar-wrapper"); + const topbarHeight = $topbarWrapper.outerHeight(); const $topbarTitle = $("#topbar-title"); - const topbarHeight = $("#topbar-wrapper").outerHeight(); + + const ATTR_TOC_SCROLLING = "toc-scrolling-up"; const SCROLL_MARK = "scroll-focus"; + const REM = 16; // in pixels + let tocScrollUpCount = 0; $("a[href*='#']") .not("[href='#']") .not("[href='#0']") .click(function(event) { - if (this.pathname.replace(/^\//, "") === location.pathname.replace(/^\//, "")) { if (location.hostname === this.hostname) { const hash = decodeURI(this.hash); @@ -27,6 +31,7 @@ $(function() { let parent = $(this).parent().prop("tagName"); let isAnchor = RegExp(/^H\d/).test(parent); + let isMobileViews = !$topbarTitle.is(":hidden"); if (typeof $target !== "undefined") { event.preventDefault(); @@ -36,18 +41,27 @@ $(function() { } let curOffset = isAnchor? $(this).offset().top : $(window).scrollTop(); - let destOffset = $target.offset().top; + let destOffset = $target.offset().top -= REM / 2; if (destOffset < curOffset) { // scroll up - if (!isAnchor && !toFootnote && $topbarTitle.is(":hidden")) { // the ToC item + if (!isAnchor && !toFootnote) { // trigger by ToC item + if (!isMobileViews) { // on desktop/tablet screens + $topbarWrapper.removeClass("topbar-down").addClass("topbar-up"); + // Send message to `${JS_ROOT}/commons/topbar-switch.js` + $topbarWrapper.attr(ATTR_TOC_SCROLLING, true); + tocScrollUpCount += 1; + } + } + + if ((isAnchor || toFootnoteRef) && isMobileViews) { destOffset -= topbarHeight; + console.log(`[smooth] mobile -= topbar height`); } } - $("html,body").animate({ + $("html").animate({ scrollTop: destOffset - - }, 800, () => { + }, 500, () => { $target.focus(); /* clean up old scroll mark */ @@ -71,6 +85,14 @@ $(function() { $target.attr("tabindex", "-1"); /* Adding tabindex for elements not focusable */ $target.focus(); /* Set focus again */ } + + if (typeof $topbarWrapper.attr(ATTR_TOC_SCROLLING) !== "undefined") { + tocScrollUpCount -= 1; + + if (tocScrollUpCount <= 0) { + $topbarWrapper.attr(ATTR_TOC_SCROLLING, "false"); + } + } }); } } diff --git a/_sass/addon/commons.scss b/_sass/addon/commons.scss index 0729239..438193a 100644 --- a/_sass/addon/commons.scss +++ b/_sass/addon/commons.scss @@ -196,10 +196,6 @@ img[data-src] { position: sticky; } - &.topbar-down { - top: 6rem; - } - > div { padding-left: 1rem; border-left: 1px solid var(--main-border-color); @@ -237,6 +233,10 @@ img[data-src] { transition: none; } } + + &.topbar-down > div { + top: 6rem; + } } #access-lastmod { diff --git a/_sass/layout/post.scss b/_sass/layout/post.scss index 4d09f23..aaf0647 100644 --- a/_sass/layout/post.scss +++ b/_sass/layout/post.scss @@ -145,11 +145,6 @@ img.preview-img { top: 4rem; transition: top 0.2s ease-in-out; animation: fade-up 0.8s; - - &.topbar-down { - top: 6rem; - } - } #toc li a { diff --git a/assets/js/dist/categories.min.js b/assets/js/dist/categories.min.js index 8cb8fb1..d4bb325 100644 --- a/assets/js/dist/categories.min.js +++ b/assets/js/dist/categories.min.js @@ -3,4 +3,4 @@ * © 2019 Cotes Chung * MIT Licensed */ 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