================
@@ -370,40 +497,128 @@ std::unique_ptr<Block> Paragraph::clone() const {
/// Choose a marker to delimit `Text` from a prioritized list of options.
/// This is more readable than escaping for plain-text.
-llvm::StringRef chooseMarker(llvm::ArrayRef<llvm::StringRef> Options,
- llvm::StringRef Text) {
+llvm::StringRef Paragraph::chooseMarker(llvm::ArrayRef<llvm::StringRef>
Options,
+ llvm::StringRef Text) const {
// Prefer a delimiter whose characters don't appear in the text.
for (llvm::StringRef S : Options)
if (Text.find_first_of(S) == llvm::StringRef::npos)
return S;
return Options.front();
}
+bool Paragraph::punctuationIndicatesLineBreak(llvm::StringRef Line) const {
+ constexpr llvm::StringLiteral Punctuation = R"txt(.:,;!?)txt";
+
+ Line = Line.rtrim();
+ return !Line.empty() && Punctuation.contains(Line.back());
+}
+
+bool Paragraph::isHardLineBreakIndicator(llvm::StringRef Rest) const {
+ // '-'/'*' md list, '@'/'\' documentation command, '>' md blockquote,
+ // '#' headings, '`' code blocks, two spaces (markdown force newline)
+ constexpr llvm::StringLiteral LinebreakIndicators = R"txt(-*@\>#`)txt";
+
+ Rest = Rest.ltrim(" \t");
+ if (Rest.empty())
+ return false;
+
+ if (LinebreakIndicators.contains(Rest.front()))
+ return true;
+
+ if (llvm::isDigit(Rest.front())) {
+ llvm::StringRef AfterDigit = Rest.drop_while(llvm::isDigit);
+ if (AfterDigit.starts_with(".") || AfterDigit.starts_with(")"))
+ return true;
+ }
+ return false;
+}
+
+bool Paragraph::isHardLineBreakAfter(llvm::StringRef Line,
+ llvm::StringRef Rest) const {
+ // In Markdown, 2 spaces before a line break forces a line break.
+ // Add a line break for plaintext in this case too.
+ // Should we also consider whether Line is short?
+ return Line.ends_with(" ") || punctuationIndicatesLineBreak(Line) ||
+ isHardLineBreakIndicator(Rest);
+}
+
void Paragraph::renderPlainText(llvm::raw_ostream &OS) const {
bool NeedsSpace = false;
+ std::string ConcatenatedText;
----------------
tcottin wrote:
I added a Block member variable to keep track of the overall string size of a
block.
This is not 100% accurate but probably better than doing as before.
https://github.com/llvm/llvm-project/pull/140498
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