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fix: Tables does not rendered correctly #7465 #8096

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merged 1 commit into from
Oct 8, 2025
+68 −21
Merged

fix: Tables does not rendered correctly #7465 #8096

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89 changes: 68 additions & 21 deletions gui/src/components/StyledMarkdownPreview/utils/remarkTables.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -23,17 +23,42 @@ import { visit } from "unist-util-visit";
export function remarkTables() {
return (tree: any) => {
visit(tree, "paragraph", (paragraphNode, index, parentOfParagraphNode) => {
let buffer = "";
visit(paragraphNode, "text", (textNode) => {
buffer += textNode.value;
// Collect all child nodes into a buffer, preserving their types
const buffer: any[] = [];
paragraphNode.children.forEach((child: any) => {
buffer.push(child);
});

// Flatten buffer to a string for regex matching, but keep track of positions
let bufferString = "";
const positions: { start: number; end: number; node: any }[] = [];

// Recursive renderer for inline nodes -> markdown-ish text
function renderInline(node: any): string {
if (!node) return "";
if (Array.isArray(node.children)) {
return node.children.map(renderInline).join("");
}
if (typeof node.value === "string") {
return node.value;
}
return "";
}

buffer.forEach((item) => {
const start = bufferString.length;
// renderInline returns a markdown-like string for inline nodes so decorations are preserved
const rendered = renderInline(item);
bufferString += rendered;
positions.push({ start, end: bufferString.length, node: item });
});

const tableRegex =
/((?:\| *[^|\r\n]+ *)+\|)(?:\r?\n)((?:\|[ :]?-+[ :]?)+\|)((?:(?:\r?\n)(?:\| *[^|\r\n]+ *)+\|)+)/g;
//// header // newline // |:---|----:| // new line // table rows

// prevent modifying if no markdown tables are present
if (!buffer.match(tableRegex)) {
if (!bufferString.match(tableRegex)) {
return;
}

Expand All @@ -42,7 +67,7 @@ export function remarkTables() {
const newNodes = [];
let failed = false;

while ((match = tableRegex.exec(buffer)) !== null) {
while ((match = tableRegex.exec(bufferString)) !== null) {
const fullTableString = match[0];
const headerGroup = match[1];
const separatorGroup = match[2];
Expand Down Expand Up @@ -104,16 +129,46 @@ export function remarkTables() {
],
};

// Add any text before the table as a text node
if (match.index > lastIndex) {
newNodes.push({
type: "text",
value: buffer.slice(lastIndex, match.index),
});
}
// Add any nodes before/after the table in one go
const tableStart = match.index;
const tableEnd = match.index + fullTableString.length;

// Process the text within the table and the surrounding text together
const beforeNodes: any[] = [];
const afterNodes: any[] = [];

positions.forEach((pos) => {
if (pos.end <= tableStart) {
beforeNodes.push(pos.node);
} else if (pos.start >= tableEnd) {
afterNodes.push(pos.node);
} else if (pos.node.type === "text") {
// Node is text and overlaps with table, may need splitting
const beforeText = pos.node.value.slice(
0,
Math.max(0, tableStart - pos.start),
);
const afterText = pos.node.value.slice(
Math.max(0, tableEnd - pos.start),
);
if (beforeText)
beforeNodes.push({ type: "text", value: beforeText });
if (afterText)
afterNodes.push({ type: "text", value: afterText });
} else {
// Node overlaps with table but isn't text (e.g., inlineCode, emphasis, etc.)
if (pos.start < tableStart) beforeNodes.push(pos.node);
if (pos.end > tableEnd) afterNodes.push(pos.node);
}
});

// Add table node
// Add to new nodes
newNodes.push(...beforeNodes);
newNodes.push(tableNode);
newNodes.push(...afterNodes);

// Mark positions as consumed
positions.length = 0;
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@cubic-dev-ai cubic-dev-ai bot Oct 4, 2025 •
edited
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Clearing the tracked child positions here means subsequent tables in the same paragraph keep their raw markdown text, so a second table renders twice (once as text, once as a table). This regresses multi-table paragraphs.

Prompt for AI agents 
Address the following comment on gui/src/components/StyledMarkdownPreview/utils/remarkTables.tsx at line 171:

<comment>Clearing the tracked child positions here means subsequent tables in the same paragraph keep their raw markdown text, so a second table renders twice (once as text, once as a table). This regresses multi-table paragraphs.</comment>

<file context>
@@ -104,16 +129,46 @@ export function remarkTables() {
+          newNodes.push(...afterNodes);
+
+          // Mark positions as consumed
+          positions.length = 0;
         } catch (e) {
           console.error(&quot;Failed to parse markdown table after regex match&quot;, e);
</file context>
Fix with Cubic

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This is intentional. All elements in positions are consumed at this stage, so the variable won’t be referenced again later. Thanks for pointing it out, though!

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Thanks, I've learnt: "In remarkTables, the positions array is fully consumed when constructing before/after nodes around a parsed table; it is not used later, so clearing positions.length = 0 at that point is intentional. In future reviews, verify whether a tracking array/variable is referenced later before flagging its clearing as a regression.".

Edit this learning here.

} catch (e) {
console.error("Failed to parse markdown table after regex match", e);
newNodes.push({
Expand All @@ -129,14 +184,6 @@ export function remarkTables() {
return;
}

// Add any remaining text after the last table
if (lastIndex < buffer.length) {
newNodes.push({
type: "text",
value: buffer.slice(lastIndex),
});
}

// Replace the original paragraph node with the new nodes
if (newNodes.length > 0) {
parentOfParagraphNode.children.splice(index, 1, ...newNodes);
Expand Down
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