Markdown: Fix liquid flow parsing (#19838)

Co-authored-by: codex <codex@openai.com>
Co-authored-by: fisker Cheung <lionkay@gmail.com>
Co-authored-by: wanxiankai <xiankai.wan@gmail.com>
Co-authored-by: seiya <20365512+seiyab@users.noreply.github.com>

changelog_unreleased/markdown/19730.md

@@ -0,0 +1,27 @@
+#### Preserve Liquid blocks after Markdown tables (#19730 by @wanxiankai, @seiyab)
+
+<!-- prettier-ignore -->
+```markdown
+<!-- Input -->
+| Argument | Type |
+| -------- | ---- |
+{% set default_params = {
+    "model": ["str"],
+} %}
+
+<!-- Prettier stable -->
+| Argument                  | Type |
+| ------------------------- | ---- |
+| {% set default_params = { |
+
+    "model": ["str"],
+
+} %}
+
+<!-- Prettier main -->
+| Argument | Type |
+| -------- | ---- |
+{% set default_params = {
+    "model": ["str"],
+} %}
+```

src/language-markdown/parse/micromark/micromark-extension-liquid.js

@@ -1,4 +1,4 @@
-import { markdownLineEnding } from "micromark-util-character";
+import { markdownLineEnding, markdownSpace } from "micromark-util-character";
 import { codes, types } from "micromark-util-symbol";
 
 /**
@@ -7,6 +7,7 @@ import { codes, types } from "micromark-util-symbol";
  * @typedef {import('mdast-util-from-markdown').CompileContext} CompileContext
  * @typedef {import('mdast-util-from-markdown').Handle} Handle
  * @typedef {import('micromark-util-types').State} State
+ * @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext
  */
 
 const nodeType = "liquidNode";
@@ -46,15 +47,37 @@ function liquidFromMarkdown() {
  */
 function liquidSyntax() {
   return {
+    flow: {
+      [codes.leftCurlyBrace]: {
+        name: "liquidFlow",
+        tokenize: tokenizeFlow,
+      },
+    },
     text: {
       [codes.leftCurlyBrace]: {
-        name: "liquid",
+        name: "liquidText",
-        tokenize,
+        tokenize: tokenizeText,
       },
     },
   };
 
-  function tokenize(effects, ok, nok) {
+  /** @this {TokenizeContext} */
+  function tokenizeFlow(effects, ok, nok) {
+    return tokenize.call(this, effects, ok, nok, "flow");
+  }
+
+  /** @this {TokenizeContext} */
+  function tokenizeText(effects, ok, nok) {
+    return tokenize.call(this, effects, ok, nok, "text");
+  }
+
+  /**
+   * @this {TokenizeContext}
+   * @param mode {"text" | "flow"}
+   */
+  function tokenize(effects, ok, nok, mode) {
+    const isFlow = mode === "flow";
+    const { interrupt, now, parser } = this;
     /** @type {typeof codes.rightCurlyBrace | typeof codes.percentSign} */
     let closingCode;
 
@@ -74,7 +97,7 @@ function liquidSyntax() {
                 ? codes.percentSign
                 : codes.rightCurlyBrace;
             effects.consume(code);
-            return inside;
+            return isFlow && interrupt ? ok : inside;
           default:
             return nok(code);
         }
@@ -95,6 +118,9 @@ function liquidSyntax() {
             effects.enter(types.lineEnding);
             effects.consume(code);
             effects.exit(types.lineEnding);
+            if (isFlow) {
+              return afterLineEnding;
+            }
             effects.enter(types.data);
             return inside;
           }
@@ -103,17 +129,63 @@ function liquidSyntax() {
       }
     }
 
+    /** @type {State} */
+    function afterLineEnding(code) {
+      if (parser.lazy[now().line]) {
+        return nok(code);
+      }
+
+      if (markdownLineEnding(code)) {
+        effects.enter(types.lineEnding);
+        effects.consume(code);
+        effects.exit(types.lineEnding);
+        return afterLineEnding;
+      }
+
+      effects.enter(types.data);
+      return inside(code);
+    }
+
     /** @type {State} */
     function mayClose(code) {
       if (code === codes.rightCurlyBrace) {
         effects.consume(code);
         effects.exit(types.data);
         effects.exit(nodeType);
-        return ok;
+        return isFlow ? afterClose : ok;
       }
 
       return inside;
     }
+
+    /** @type {State} */
+    function afterClose(code) {
+      if (markdownSpace(code)) {
+        effects.enter(types.whitespace);
+        effects.consume(code);
+        return afterWhitespace;
+      }
+
+      return after(code);
+    }
+
+    /** @type {State} */
+    function afterWhitespace(code) {
+      if (markdownSpace(code)) {
+        effects.consume(code);
+        return afterWhitespace;
+      }
+
+      effects.exit(types.whitespace);
+      return after(code);
+    }
+
+    /** @type {State} */
+    function after(code) {
+      return code === codes.eof || markdownLineEnding(code)
+        ? ok(code)
+        : nok(code);
+    }
   }
 }
 

src/language-markdown/print/children.js

@@ -42,7 +42,11 @@ function printChildren(path, options, print, events = {}) {
 }
 
 function shouldPrePrintHardline({ node, parent }) {
-  const isInlineNode = INLINE_NODE_TYPES.has(node.type);
+  const isInlineNode =
+    INLINE_NODE_TYPES.has(node.type) &&
+    !(
+      node.type === "liquidNode" && !INLINE_NODE_WRAPPER_TYPES.has(parent.type)
+    );
 
   const isInlineHTML =
     node.type === "html" && INLINE_NODE_WRAPPER_TYPES.has(parent.type);
@@ -119,6 +123,9 @@ function shouldPrePrintDoubleHardline(path, options) {
     parent.type === "listItem" &&
     previous.type === "paragraph" &&
     previous.position.end.line + 1 === node.position.start.line;
+  const isBlockLiquidWithoutBlankLine =
+    (node.type === "liquidNode" || previous.type === "liquidNode") &&
+    previous.position.end.line + 1 === node.position.start.line;
 
   return !(
     isSiblingNode ||
@@ -126,7 +133,8 @@ function shouldPrePrintDoubleHardline(path, options) {
     isPrevNodePrettierIgnore ||
     isBlockHtmlWithoutBlankLineBetweenPrevHtml ||
     isBlockHtmlWithoutBlankLineBetweenPrevParagraph ||
-    isHtmlDirectAfterListItem
+    isHtmlDirectAfterListItem ||
+    isBlockLiquidWithoutBlankLine
   );
 }
 

tests/format/markdown/liquid/__snapshots__/format.test.js.snap

@@ -24,7 +24,8 @@ proseWrap: "always"
 
 {%
  if user
-%} Hello, {{ user }}! {% endif %}
+%} Hello, {{ user }}!
+{% endif %}
 
 ================================================================================
 `;
@@ -84,7 +85,8 @@ where does it end }}
 
 # Userscripts <span>[{% img github.svg alt:"View on GitHub" title:"View on GitHub" %}](https://github.com/Charcoal-SE/Userscripts) [Build <span>status loading…</span>](//travis-ci.org/Charcoal-SE/userscripts){: .build}</span>
 
-{% css userscripts %} {% js userscripts %}
+{% css userscripts %}
+{% js userscripts %}
 
 {{ foo
 multiline
@@ -406,6 +408,109 @@ This input uses Hugo shortcode. Prettier doesn't support this explicitly but it
 ================================================================================
 `;
 
+exports[`issue-19724.md - {"proseWrap":"always"} format 1`] = `
+====================================options=====================================
+parsers: ["markdown"]
+proseWrap: "always"
+                                                      printWidth: 80 (default) |
+=====================================input======================================
+{% macro param_table(params=None) -%}
+| Argument | Type |
+| -------- | ---- |
+{% set default_params = {
+    "model": ["str"],
+} %}
+{% endmacro %}
+
+---
+
+> abc
+{% abc %}
+
+---
+
+Inline {{ liquid }} stays inline.
+
+---
+
+{% liquid %} followed by text
+
+=====================================output=====================================
+{% macro param_table(params=None) -%}
+| Argument | Type |
+| -------- | ---- |
+{% set default_params = {
+    "model": ["str"],
+} %}
+{% endmacro %}
+
+---
+
+> abc
+{% abc %}
+
+---
+
+Inline {{ liquid }} stays inline.
+
+---
+
+{% liquid %} followed by text
+
+================================================================================
+`;
+
+exports[`issue-19724.md format 1`] = `
+====================================options=====================================
+parsers: ["markdown"]
+                                                      printWidth: 80 (default) |
+=====================================input======================================
+{% macro param_table(params=None) -%}
+| Argument | Type |
+| -------- | ---- |
+{% set default_params = {
+    "model": ["str"],
+} %}
+{% endmacro %}
+
+---
+
+> abc
+{% abc %}
+
+---
+
+Inline {{ liquid }} stays inline.
+
+---
+
+{% liquid %} followed by text
+
+=====================================output=====================================
+{% macro param_table(params=None) -%}
+| Argument | Type |
+| -------- | ---- |
+{% set default_params = {
+    "model": ["str"],
+} %}
+{% endmacro %}
+
+---
+
+> abc
+{% abc %}
+
+---
+
+Inline {{ liquid }} stays inline.
+
+---
+
+{% liquid %} followed by text
+
+================================================================================
+`;
+
 exports[`unbalanced-mismatched-braces.md - {"proseWrap":"always"} format 1`] = `
 ====================================options=====================================
 parsers: ["markdown"]

tests/format/markdown/liquid/issue-19724.md

@@ -0,0 +1,20 @@
+{% macro param_table(params=None) -%}
+| Argument | Type |
+| -------- | ---- |
+{% set default_params = {
+    "model": ["str"],
+} %}
+{% endmacro %}
+
+---
+
+> abc
+{% abc %}
+
+---
+
+Inline {{ liquid }} stays inline.
+
+---
+
+{% liquid %} followed by text