[revealjs] Improve footer handling

news/changelog-1.6.md

@@ -25,6 +25,7 @@ All changes included in 1.6:
 - Remove wrong `sourceMappingUrl` entry in SASS built css.
 - ([#7715](https://github.com/quarto-dev/quarto-cli/issues/7715)): Revealjs don't support anymore special Pandoc syntax making BulletList in Blockquotes become incremental list. This was confusing and unexpected behavior. Supported syntax for incremental list is documented at <https://quarto.org/docs/presentations/revealjs/#incremental-lists>.
 - ([#9742](https://github.com/quarto-dev/quarto-cli/issues/9742)): Links to cross-referenced images correctly works.
+- ([#9558](https://github.com/quarto-dev/quarto-cli/issues/9558)): To prevent default footer to show on slide, set `footer='false'` attribute on the slide header, e.g. `## Slide with no footer {footer='false'}`
 - ([#6012](https://github.com/quarto-dev/quarto-cli/issues/6012)): Add styling for `kbd` element in Revealjs slides.
 
 ## `typst` Format

src/format/reveal/format-reveal.ts

@@ -320,7 +320,7 @@ export function revealjsFormat() {
 
 function revealMarkdownAfterBody(format: Format) {
   const lines: string[] = [];
-  lines.push("::: {.quarto-auto-generated-content}\n");
+  lines.push("::: {.quarto-auto-generated-content style='display: none;'}\n");
   if (format.metadata[kSlideLogo]) {
     lines.push(
       `<img src="${format.metadata[kSlideLogo]}" class="slide-logo" />`,
@@ -396,30 +396,13 @@ const handleHashTypeNumber = (
 };
 
 const handleAutoGeneratedContent = (doc: Document) => {
-  // bugfix for #6800
-  // if slides have content that was added by quarto then move that to the parent node
-  for (const slide of doc.querySelectorAll("section.slide")) {
-    const slideContentFromQuarto = (slide as Element).querySelector(
-      ".quarto-auto-generated-content",
-    );
-    if (
-      slideContentFromQuarto &&
-      (slide as Element).getAttribute("data-visibility") === "hidden"
-    ) {
-      if (slideContentFromQuarto.childElementCount === 0) {
-        slideContentFromQuarto.remove();
-      } else {
-        for (const otherSlide of doc.querySelectorAll("section.slide")) {
-          if (
-            (otherSlide as Element).getAttribute("data-visibility") !==
-              "hidden"
-          ) {
-            otherSlide.appendChild(slideContentFromQuarto);
-            break;
-          }
-        }
-      }
-    }
+  // Move quarto auto-generated content outside of slides and hide it
+  // Content is moved with appendChild in quarto-support plugin
+  const slideContentFromQuarto = doc.querySelector(
+    ".quarto-auto-generated-content",
+  );
+  if (slideContentFromQuarto) {
+    doc.querySelector("div.reveal")?.appendChild(slideContentFromQuarto);
   }
 };
 

src/resources/formats/revealjs/plugins/support/support.js

@@ -136,34 +136,51 @@ window.QuartoSupport = function () {
     })
   }
 
-   // add footer text
-   function addFooter(deck) {
+  // add footer text
+  function addFooter(deck) {
     const revealParent = deck.getRevealElement();
     const defaultFooterDiv = document.querySelector(".footer-default");
+    // Set per slide footer if any defined, 
+    // or show default unless data-footer="false" for no footer on this slide
+    const setSlideFooter = (ev, defaultFooterDiv) => {
+      const currentSlideFooter = ev.currentSlide.querySelector(".footer");
+      const onDarkBackground = deck.getSlideBackground(ev.indexh, ev.indexv).classList.contains('has-dark-background')
+      const onLightBackground = deck.getSlideBackground(ev.indexh, ev.indexv).classList.contains('has-light-background')
+      if (currentSlideFooter) {
+        defaultFooterDiv.style.display = "none";
+        const slideFooter = currentSlideFooter.cloneNode(true);
+        handleLinkClickEvents(deck, slideFooter);
+        deck.getRevealElement().appendChild(slideFooter);
+        toggleBackgroundTheme(slideFooter, onDarkBackground, onLightBackground)
+      } else if (ev.currentSlide.getAttribute("data-footer") === "false") {
+        defaultFooterDiv.style.display = "none";
+      } else {
+        defaultFooterDiv.style.display = "block";
+        toggleBackgroundTheme(defaultFooterDiv, onDarkBackground, onLightBackground)
+      }
+    }
     if (defaultFooterDiv) {
+      // move default footnote to the div.reveal element
       revealParent.appendChild(defaultFooterDiv);
       handleLinkClickEvents(deck, defaultFooterDiv);
+
       if (!isPrintView()) {
+        // Ready even is needed so that footer customization applies on first loaded slide
+        deck.on('ready', (ev) => {
+          // Set footer (custom, default or none)
+          setSlideFooter(ev, defaultFooterDiv)
+        });
+        // Any new navigated new slide will get the custom footnote check
         deck.on("slidechanged", function (ev) {
+          // Remove presentation footer defined by previous slide
           const prevSlideFooter = document.querySelector(
             ".reveal > .footer:not(.footer-default)"
           );
           if (prevSlideFooter) {
             prevSlideFooter.remove();
           }
-          const currentSlideFooter = ev.currentSlide.querySelector(".footer");
-          const onDarkBackground = Reveal.getSlideBackground(ev.indexh, ev.indexv).classList.contains('has-dark-background')
-          const onLightBackground = Reveal.getSlideBackground(ev.indexh, ev.indexv).classList.contains('has-light-background')
-          if (currentSlideFooter) {
-            defaultFooterDiv.style.display = "none";
-            const slideFooter = currentSlideFooter.cloneNode(true);
-            handleLinkClickEvents(deck, slideFooter);
-            deck.getRevealElement().appendChild(slideFooter);
-            toggleBackgroundTheme(slideFooter, onDarkBackground, onLightBackground)
-          } else {
-            defaultFooterDiv.style.display = "block";
-            toggleBackgroundTheme(defaultFooterDiv, onDarkBackground, onLightBackground)
-          }
+          // Set new one (custom, default or none)
+          setSlideFooter(ev, defaultFooterDiv)
         });
       }
     }
@@ -318,6 +335,13 @@ window.QuartoSupport = function () {
     }
   }
 
+  function cleanEmptyAutpGeneratedContent(deck) {
+    const div = document.querySelector('div.quarto-auto-generated-content')
+    if (div.textContent.trim() === '') {
+      div.remove()
+    }
+  }
+
   return {
     id: "quarto-support",
     init: function (deck) {
@@ -333,6 +357,8 @@ window.QuartoSupport = function () {
       handleSlideChanges(deck);
       workaroundMermaidDistance(deck);
       handleWhiteSpaceInColumns(deck);
+      // should stay last
+      cleanEmptyAutpGeneratedContent(deck);
     },
   };
 };

tests/docs/playwright/ojs/test-ojs-echo-false-codetools-dropdown-2.qmd

@@ -1,5 +1,6 @@
 ---
 title: Reproing a bug on codetools dropdown
+format: html
 code-tools: true
 ---
 

tests/docs/playwright/ojs/test-ojs-echo-false-codetools-dropdown.qmd

@@ -1,5 +1,6 @@
 ---
 title: Reproing a bug on codetools dropdown
+format: html
 code-tools: true
 ---
 

tests/docs/playwright/revealjs/.gitignore

@@ -0,0 +1,3 @@
+.quarto/
+*.html
+*_files/

tests/docs/playwright/revealjs/logo-footer.qmd

@@ -0,0 +1,26 @@
+---
+format:
+  revealjs:
+    logo: quarto.png
+    footer: "Footer text"
+---
+
+## Slide 1
+
+Footer is shown on all slides
+
+## Slide 2
+
+Like logo
+
+## Slide 3 {footer=false}
+
+unless `{footer=false}` is set, which will remove the footer
+
+## Slide 4
+
+Custom footer can also be set
+
+::: {.footer}
+A different footer
+:::

tests/docs/smoke-all/2023/09/11/6800.qmd

@@ -3,12 +3,11 @@ title: "test"
 format:
     revealjs:
         footer: "hello world"
-keep-md: true
 _quarto:
   tests:
     revealjs:
       ensureHtmlElements:
-        - ["div.footer"]
+        - ["div.footer", "div.footer-default"]
 ---
 
 ## Quarto

tests/integration/playwright-tests.test.ts

@@ -39,7 +39,7 @@ for (const { path: fileName } of globOutput) {
   // mediabag inspection if we don't wait all renders
   // individually. This is very slow..
   await execProcess({
-    cmd: [quartoDevCmd(), "render", input, "--to", "html"],
+    cmd: [quartoDevCmd(), "render", input],
   });
   fileNames.push(fileName);
 }

tests/integration/playwright/tests/revealjs.spec.ts

@@ -0,0 +1,17 @@
+import { test, expect } from '@playwright/test';
+
+test('logo and footer are correctly shown', async ({ page }) => {
+  await page.goto('./revealjs/logo-footer.html#/slide-1');
+  await expect(page.locator('.reveal > .footer.footer-default')).toContainText('Footer text');
+  await expect(page.locator('.slide-logo')).toHaveAttribute("src", "quarto.png");
+  await page.keyboard.press('ArrowRight'); // Next slide
+  await expect(page.locator('.reveal > .footer.footer-default')).toContainText('Footer text');
+  await expect(page.locator('.slide-logo')).toHaveAttribute("src", "quarto.png");
+  await page.keyboard.press('ArrowRight'); // Next slide
+  await expect(page.locator('.reveal > .footer')).toBeHidden();
+  await expect(page.locator('.slide-logo')).toHaveAttribute("src", "quarto.png");
+  await page.keyboard.press('ArrowRight'); // Next slide
+  await expect(page.locator('.reveal > .footer.footer-default')).toBeHidden();
+  await expect(page.locator('.reveal > .footer:not(.footer-default)')).toContainText('A different footer');
+  await expect(page.locator('.slide-logo')).toHaveAttribute("src", "quarto.png");
+});