CodeBlock expanding to fit the height of parent container

[mmacoveiciuc]

Is there a way to get the CodeBlock component to expand and fit the height of the parent container? Or if not that, is there a way to force the CodeBlock to always display a set number of lines without having to append new lines to the content of the code.

[dosubot[bot]]

Hello @mmacoveiciuc! 👋 I'm Dosu, a friendly bot here to assist with bugs, answer questions, and guide you on contributing while we wait for a human maintainer to join us. I'm taking a look at your issue regarding the CodeBlock component now and will get back to you with a full answer shortly. Let's get this sorted together!

[TwilioPasteBot]

Disclaimer: This is a very experimental bot using OpenAI's GPT-4. The answers may not be correct, a human will review the answer and update it if necessary.

---

Sorry, I don't know how to help with that.

I did do a search though, and I managed to find these other Discussions that might be similar or related to your question. Give them a read to see if they answer your question. If they do, head back here and update this discussion and mark it as answered, pointing others to the related discussion:

• Do we have a scrollbar component in a code block? (updated: 04/10/2023, similarity score: 85%)
• Text area max height (updated: 08/10/2022, similarity score: 84%)
• Do we have a scrollbar component in a code block? - Answer (updated: 04/10/2023, similarity score: 84%)

[dosubot[bot]]

To make the CodeBlock component expand to fit the height of the parent container or display a set number of lines without appending new lines to the code content, you can utilize the maxLines prop in combination with CSS to control the height of the code block. However, the provided code does not directly implement functionality to limit the display to a set number of lines based on the maxLines prop. To achieve this, you would need to apply additional styling to the Box component that wraps the SyntaxHighlighter.

Here's an approach to modify the component to support these requirements:

1. Expand to Fit Parent Container: Ensure the parent container of the CodeBlock component has a defined height. The CodeBlock component will expand to fit this height because it uses a flex display mode (display="flex") for the content box, which naturally expands to fit its container.

2. Display a Set Number of Lines: To display a set number of lines, you can use a combination of CSS properties such as max-height and overflow-y on the Box wrapping the SyntaxHighlighter. You would calculate the max-height based on the line height and the number of lines you wish to display.

Here is an example modification to include a maxLines functionality:

<Box element={`${element}_CONTENT`} display="flex" alignItems="center" overflowX="auto" gridArea="code-block"
  style={{
    maxHeight: maxLines ? `${maxLines * lineHeight}px` : 'auto', // Calculate max-height based on line height and maxLines
    overflowY: 'auto' // Add vertical scrolling
  }}
>
  <SyntaxHighlighter
    language={language}
    style={getPasteSyntaxTheme(maxLines) as Record<string, React.CSSProperties>}
    showLineNumbers={showLineNumbers}
    wrapLongLines={wrapLines}
    wrapLines={true}
  >
    {code}
  </SyntaxHighlighter>
</Box>

In this modification, lineHeight should be a predefined value that matches the line height used by your SyntaxHighlighter component. You might need to adjust this value based on your specific font and styling to accurately reflect the height of a single line of code.

This approach allows the CodeBlock component to either expand to fit the height of its parent container or display a specific number of lines, based on the maxLines prop, without the need to append new lines to the code content.

Regarding the default behavior of the CodeBlock component, it is set to a "multi-line" variant with enabled line wrapping (wrapLines={true}). The display of line numbers and the exact height of the component would depend on the specific usage and the values provided for the showLineNumbers and other relevant props.

Unfortunately, I wasn't able to find the default line height used by the SyntaxHighlighter component in the Paste design system within the repository. You might need to inspect the rendered component in your browser to determine the exact line height used.

For more details, you can refer to the source code of the CodeBlock component in the Paste design system here.

I hope this helps! If you have any other questions or need further clarification, feel free to ask.

Sources

• packages/paste-core/components/code-block/src/CodeBlock.tsx

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[yunuscanemre]

posting a screenshot to help visualize :)

[nkrantz]

Hey @mmacoveiciuc, you're right, the only way to fix the height of the CodeBlock beyond the height of the actual code would be to append blank lines of code to the bottom of your code string. There's no existing minLines prop - only maxLines. Thanks!