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Fix markdown formatting for bold (#7257)

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* Fix markdown formatting for bold

Fix https://github.com/vector-im/element-web/issues/4674

* I hate you too eslint
This commit is contained in:
Dariusz Niemczyk 2021-12-02 11:56:23 +01:00 • committed by GitHub
parent ab750aefce
commit fda0c2cf79
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2 changed files with 38 additions and 8 deletions
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18
src/Markdown.ts
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@ -93,6 +93,11 @@ function getTextUntilEndOrLinebreak(node: commonmark.Node) {
return text;
}
const formattingChangesByNodeType = {
'emph': '_',
'strong': '__',
};
/**
* Class that wraps commonmark, adding the ability to see whether
* a given message actually uses any markdown syntax or whether
@ -128,7 +133,7 @@ export default class Markdown {
let text = '';
let isInPara = false;
let previousNode: commonmark.Node | null = null;
let shouldUnlinkEmphasisNode = false;
let shouldUnlinkFormattingNode = false;
while ((event = walker.next())) {
const { node } = event;
if (node.type === 'paragraph') {
@ -152,7 +157,7 @@ export default class Markdown {
text += node.literal;
}
// We should not do this if previous node was not a textnode, as we can't combine it then.
if (node.type === 'emph' && previousNode.type === 'text') {
if ((node.type === 'emph' || node.type === 'strong') && previousNode.type === 'text') {
if (event.entering) {
const foundLinks = linkify.find(text);
for (const { value } of foundLinks) {
@ -161,7 +166,8 @@ export default class Markdown {
* NOTE: This technically should unlink the emph node and create LINK nodes instead, adding all the next elements as siblings
* but this solution seems to work well and is hopefully slightly easier to understand too
*/
const nonEmphasizedText = `_${node.firstChild.literal}_`;
const format = formattingChangesByNodeType[node.type];
const nonEmphasizedText = `${format}${node.firstChild.literal}${format}`;
const f = getTextUntilEndOrLinebreak(node);
const newText = value + nonEmphasizedText + f;
const newLinks = linkify.find(newText);
@ -175,7 +181,7 @@ export default class Markdown {
// Remove `em` opening and closing nodes
node.unlink();
previousNode.insertAfter(event.node);
shouldUnlinkEmphasisNode = true;
shouldUnlinkFormattingNode = true;
} else {
logger.error(
"Markdown links escaping found too many links for following text: ",
@ -189,9 +195,9 @@ export default class Markdown {
}
}
} else {
if (shouldUnlinkEmphasisNode) {
if (shouldUnlinkFormattingNode) {
node.unlink();
shouldUnlinkEmphasisNode = false;
shouldUnlinkFormattingNode = false;
}
}
}