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LibWebView: Properly handle new lines inside styled view-source elements

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When we want to inject a CSS counter for a line, we need to be sure to
handle if we had previously opened a styled span for the current source
substring. For example, if we see a new line in the middle of a comment,
we will have previously opened the following tag:

    <span class="comment">

So when injecting a new line and the <span class="line"> element (for
CSS counters), we need to close the previous span and insert a newly
opened tag to continue using the style.
This commit is contained in:
Timothy Flynn 2024-09-03 14:14:06 -04:00 • committed by Andreas Kling
commit f1395a2c38
Notes: github-actions[bot] 2024-09-04 14:00:51 +00:00
1 changed files with 20 additions and 11 deletions
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31
Userland/Libraries/LibWebView/SourceHighlighter.cpp
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@ -79,27 +79,36 @@ String highlight_source(URL::URL const& url, StringView source)
auto segment = source.substring_view(previous_position, end_position - previous_position);
if (class_name.has_value())
builder.appendff("<span class=\"{}\">"sv, *class_name);
auto append_class_start = [&]() {
if (class_name.has_value())
builder.appendff("<span class=\"{}\">"sv, *class_name);
};
auto append_class_end = [&]() {
if (class_name.has_value())
builder.append("</span>"sv);
};
append_class_start();
for (auto code_point : Utf8View { segment }) {
if (code_point == '&')
if (code_point == '&') {
builder.append("&amp;"sv);
else if (code_point == 0xA0)
} else if (code_point == 0xA0) {
builder.append("&nbsp;"sv);
else if (code_point == '<')
} else if (code_point == '<') {
builder.append("&lt;"sv);
else if (code_point == '>')
} else if (code_point == '>') {
builder.append("&gt;"sv);
else if (code_point == '\n')
} else if (code_point == '\n') {
append_class_end();
builder.append("</span>\n<span class=\"line\">"sv);
else
append_class_start();
} else {
builder.append_code_point(code_point);
}
}
if (class_name.has_value())
builder.append("</span>"sv);
append_class_end();
previous_position = end_position;
};