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Code Issues Releases Wiki Activity

Markdown: Let WikiText parsing handle the creation of LaTeX widgets. (#6428)

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* Markdown: Let WikiText parsing handle the creation of LaTeX widgets.

When embedding LaTeX snippets in inline HTML nodes, such as TiddlyRemember
macros or HTML tables, the parsing of latex nodes breaks the WikiText by
splitting it into pieces around the latex node.

This commit fixes the issue by converting the Remarkable katex nodes back to
text, using a newline to indicate a block katex snippet. This is then re-parsed
by the WikiText KaTeX plugin.

TESTED:

Created a test wiki with:
```
$ node tiddlywiki.js test --init markdowndemo
$ node tiddlywiki.js test --listen
```

* Verified markdown + KaTeX support still works as expected.
* Verified that embedding LaTeX snippets in inline HTML works (e.g. `<a
href="https://example.com/">$x^2$</a>`).
* Verified the markdown + KaTeX support works as expected with renderWikiText
set to `false`.

* Style: Remove spaces between if and opening parentheses.
This commit is contained in:
RJ Skerry-Ryan 2022-01-30 03:23:00 -08:00 committed by GitHub
parent 7d2994388b
commit 13faeaa0bd
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 34 additions and 23 deletions
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2
plugins/tiddlywiki/markdown/config_renderWikiTextPragma.tid
View File

@ -1,3 +1,3 @@
title: $:/config/markdown/renderWikiTextPragma
\rules only html image macrocallinline syslink transcludeinline wikilink filteredtranscludeblock macrocallblock transcludeblock
\rules only html image macrocallinline syslink transcludeinline wikilink filteredtranscludeblock macrocallblock transcludeblock latex-parser

55
plugins/tiddlywiki/markdown/wrapper.js
View File

@ -36,22 +36,26 @@ var accumulatingTypes = {
"text": true,
"softbreak": true
};
// If rendering WikiText, we treat katex nodes as text.
if(pluginOpts.renderWikiText) {
accumulatingTypes["katex"] = true;
}
var md = new Remarkable(remarkableOpts);
// If tiddlywiki/katex plugin is present, use remarkable-katex to enable katex support.
if ($tw.modules.titles["$:/plugins/tiddlywiki/katex/katex.min.js"]) {
if($tw.modules.titles["$:/plugins/tiddlywiki/katex/katex.min.js"]) {
var rk = require("$:/plugins/tiddlywiki/markdown/remarkable-katex.js");
md = md.use(rk);
}
if (parseAsBoolean("$:/config/markdown/linkify")) {
if(parseAsBoolean("$:/config/markdown/linkify")) {
md = md.use(linkify);
}
function findTagWithType(nodes, startPoint, type, level) {
for (var i = startPoint; i < nodes.length; i++) {
if (nodes[i].type === type && nodes[i].level === level) {
if(nodes[i].type === type && nodes[i].level === level) {
return i;
}
}
@ -77,7 +81,7 @@ function convertNodes(remarkableTree, isStartOfInline) {
var accumulatedText = '';
function withChildren(currentIndex, currentLevel, closingType, nodes, callback) {
var j = findTagWithType(nodes, currentIndex + 1, closingType, currentLevel);
if (j === false) {
if(j === false) {
console.error("Failed to find a " + closingType + " node after position " + currentIndex);
console.log(nodes);
return currentIndex + 1;
@ -101,7 +105,7 @@ function convertNodes(remarkableTree, isStartOfInline) {
switch (currentNode.type) {
case "paragraph_open":
// If the paragraph is a "tight" layout paragraph, don't wrap children in a <p> tag.
if (currentNode.tight) {
if(currentNode.tight) {
i = withChildren(i, currentNode.level, "paragraph_close", remarkableTree, function(children) {
Array.prototype.push.apply(out, children);
});
@ -128,14 +132,14 @@ function convertNodes(remarkableTree, isStartOfInline) {
case "link_open":
i = withChildren(i, currentNode.level, "link_close", remarkableTree, function(children) {
if (currentNode.href[0] !== "#") {
if(currentNode.href[0] !== "#") {
// External link
var attributes = {
class: { type: "string", value: "tc-tiddlylink-external" },
href: { type: "string", value: currentNode.href },
rel: { type: "string", value: "noopener noreferrer" }
};
if (pluginOpts.linkNewWindow) {
if(pluginOpts.linkNewWindow) {
attributes.target = { type: "string", value: "_blank" };
}
out.push({
@ -186,7 +190,7 @@ function convertNodes(remarkableTree, isStartOfInline) {
break;
case "softbreak":
if (remarkableOpts.breaks) {
if(remarkableOpts.breaks) {
out.push({
type: "element",
tag: "br",
@ -208,7 +212,7 @@ function convertNodes(remarkableTree, isStartOfInline) {
var elementTag = currentNode.type.slice(0, 2);
i = withChildren(i, currentNode.level, elementTag + "_close", remarkableTree, function(children) {
var attributes = {};
if (currentNode.align) {
if(currentNode.align) {
attributes.style = { type: "string", value: "text-align:" + currentNode.align };
}
out.push({
@ -237,17 +241,24 @@ function convertNodes(remarkableTree, isStartOfInline) {
break;
case "katex":
out.push({
type: "latex",
attributes: {
text: { type: "text", value: currentNode.content },
displayMode: { type: "text", value: currentNode.block ? "true" : "false" }
}
});
// If rendering WikiText, convert the katex node back to text for parsing by the WikiText LaTeX parser.
if(pluginOpts.renderWikiText) {
// If this is a block, add a newline to trigger the KaTeX plugins block detection.
var displayModeSuffix = currentNode.block ? "\n" : "";
accumulatedText = accumulatedText + "$$" + currentNode.content + displayModeSuffix + "$$";
} else {
out.push({
type: "latex",
attributes: {
text: { type: "text", value: currentNode.content },
displayMode: { type: "text", value: currentNode.block ? "true" : "false" }
}
});
}
break;
default:
if (currentNode.type.substr(currentNode.type.length - 5) === "_open") {
if(currentNode.type.substr(currentNode.type.length - 5) === "_open") {
var tagName = currentNode.type.substr(0, currentNode.type.length - 5);
i = wrappedElement(tagName, i, currentNode.level, tagName + "_close", remarkableTree);
} else {
@ -261,7 +272,7 @@ function convertNodes(remarkableTree, isStartOfInline) {
}
// We test to see if we process the block now, or if there's
// more to accumulate first.
if (accumulatedText
if(accumulatedText
&& (
remarkableOpts.breaks ||
(i+1) >= remarkableTree.length ||
@ -271,7 +282,7 @@ function convertNodes(remarkableTree, isStartOfInline) {
// The Markdown compiler thinks this is just text.
// Hand off to the WikiText parser to see if there's more to render
// But only if it's configured to, and we have more than whitespace
if (!pluginOpts.renderWikiText || accumulatedText.match(/^\s*$/)) {
if(!pluginOpts.renderWikiText || accumulatedText.match(/^\s*$/)) {
out.push({
type: "text",
text: accumulatedText
@ -281,7 +292,7 @@ function convertNodes(remarkableTree, isStartOfInline) {
// handle as a block-level parse. Otherwise not.
var parseAsInline = !(isStartOfInline && i === 0);
var textToParse = accumulatedText;
if (pluginOpts.renderWikiTextPragma !== "") {
if(pluginOpts.renderWikiTextPragma !== "") {
textToParse = pluginOpts.renderWikiTextPragma + "\n" + textToParse;
}
var wikiParser = $tw.wiki.parseText("text/vnd.tiddlywiki", textToParse, {
@ -292,7 +303,7 @@ function convertNodes(remarkableTree, isStartOfInline) {
// If we parsed as a block, but the root element the WikiText parser gave is a paragraph,
// we should discard the paragraph, since the way Remarkable nests its nodes, this "inline"
// node is always inside something else that's a block-level element
if (!parseAsInline
if(!parseAsInline
&& rs.length === 1
&& rs[0].type === "element"
&& rs[0].tag === "p"
@ -301,7 +312,7 @@ function convertNodes(remarkableTree, isStartOfInline) {
}
// If the original text element started with a space, add it back in
if (rs.length > 0
if(rs.length > 0
&& rs[0].type === "text"
&& (accumulatedText[0] === " " || accumulatedText[0] === "\n")
) {