content, test: transformContent: handle indentation more carefully

3 files changed, 85 insertions, 4 deletions

diff --git a/src/content/dependencies/transformContent.js b/src/content/dependencies/transformContent.js
index b0a7796c..2002ebee 100644
--- a/src/content/dependencies/transformContent.js
+++ b/src/content/dependencies/transformContent.js
@@ -562,11 +562,14 @@ export default {
     const transformMultiline = () => {
       const markedInput =
         extractNonTextNodes()
-          // Compress multiple line breaks into single line breaks.
-          .replace(/\n{2,}/g, '\n')
+          // Compress multiple line breaks into single line breaks,
+          // except when they're preceding or following indented
+          // text (by at least two spaces).
+          .replace(/(?<!  .*)\n{2,}(?!^  )/gm, '\n') /* eslint-disable-line no-regex-spaces */
           // Expand line breaks which don't follow a list, quote,
-          // or <br> / "  ".
-          .replace(/(?<!^ *-.*|^>.*|  $|<br>$)\n+/gm, '\n\n') /* eslint-disable-line no-regex-spaces */
+          // or <br> / "  ", and which don't precede or follow
+          // indented text (by at least two spaces).
+          .replace(/(?<!^ *-.*|^>.*|^  .*\n*|  $|<br>$)\n+(?!  |\n)/gm, '\n\n') /* eslint-disable-line no-regex-spaces */
           // Expand line breaks which are at the end of a list.
           .replace(/(?<=^ *-.*)\n+(?!^ *-)/gm, '\n\n')
           // Expand line breaks which are at the end of a quote.
diff --git a/tap-snapshots/test/snapshot/transformContent.js.test.cjs b/tap-snapshots/test/snapshot/transformContent.js.test.cjs
index 85ee740f..9ab299e6 100644
--- a/tap-snapshots/test/snapshot/transformContent.js.test.cjs
+++ b/tap-snapshots/test/snapshot/transformContent.js.test.cjs
@@ -10,6 +10,45 @@ exports[`test/snapshot/transformContent.js > TAP > transformContent (snapshot) >
 <p>Very nice: <time datetime="Fri, 25 Oct 2413 03:00:00 GMT">10/25/2413</time></p>
 `
 
+exports[`test/snapshot/transformContent.js > TAP > transformContent (snapshot) > hanging indent list 1`] = `
+<p>Hello!</p>
+<ul>
+<li><p>I am a list item and I
+go on and on and on
+and on and on and on.</p>
+</li>
+<li><p>I am another list item.
+Yeah.</p>
+</li>
+</ul>
+<p>In-between!</p>
+<ul>
+<li>Spooky,
+spooky, I say!</li>
+<li>Following list item.
+No empty line around me.</li>
+<li>Very cool.
+So, so cool.</li>
+</ul>
+<p>Goodbye!</p>
+`
+
+exports[`test/snapshot/transformContent.js > TAP > transformContent (snapshot) > indent on a directly following line 1`] = `
+<div>
+    <span>Wow!</span>
+</div>
+`
+
+exports[`test/snapshot/transformContent.js > TAP > transformContent (snapshot) > indent on an indierctly following line 1`] = `
+<p>Some text.</p>
+<p>Yes, some more text.</p>
+<pre><code>I am hax0rz!!
+All yor base r blong 2 us.
+</code></pre>
+<p>Aye.</p>
+<p>Aye aye aye.</p>
+`
+
 exports[`test/snapshot/transformContent.js > TAP > transformContent (snapshot) > inline images 1`] = `
 <p><img src="snooping.png"> as USUAL...</p>
 <p>What do you know? <img src="cowabunga.png" width="24" height="32"></p>
diff --git a/test/snapshot/transformContent.js b/test/snapshot/transformContent.js
index b05beac1..740d94df 100644
--- a/test/snapshot/transformContent.js
+++ b/test/snapshot/transformContent.js
@@ -37,6 +37,45 @@ testContentFunctions(t, 'transformContent (snapshot)', async (t, evaluate) => {
       `That's right, [[album:cool-album]]!`);
 
   quickSnapshot(
+    'indent on a directly following line',
+      `<div>\n` +
+      `    <span>Wow!</span>\n` +
+      `</div>`);
+
+  quickSnapshot(
+    'indent on an indierctly following line',
+      `Some text.\n` +
+      `Yes, some more text.\n` +
+      `\n` +
+      `    I am hax0rz!!\n` +
+      `    All yor base r blong 2 us.\n` +
+      `\n` +
+      `Aye.\n` +
+      `Aye aye aye.`);
+
+  quickSnapshot(
+    'hanging indent list',
+      `Hello!\n` +
+      `\n` +
+      `* I am a list item and I\n` +
+      `  go on and on and on\n` +
+      `  and on and on and on.\n` +
+      `\n` +
+      `* I am another list item.\n` +
+      `  Yeah.\n` +
+      `\n` +
+      `In-between!\n` +
+      `\n` +
+      `* Spooky,\n` +
+      `  spooky, I say!\n` +
+      `* Following list item.\n` +
+      `  No empty line around me.\n` +
+      `* Very cool.\n` +
+      `  So, so cool.\n` +
+      `\n` +
+      `Goodbye!`);
+
+  quickSnapshot(
     'inline images',
       `<img src="snooping.png"> as USUAL...\n` +
       `What do you know? <img src="cowabunga.png" width="24" height="32">\n` +