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LibHTML: Collapse whitespace in LayoutText unless white-space: pre;

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Before breaking the Text node contents into words, collapse all of the
whitespace into single space (' ') characters. This fixes broken
rendering of paragraphs with newlines in them. :^)
This commit is contained in:
Andreas Kling 2019-10-09 16:29:23 +02:00
parent b4389ca4b0
commit 2ac190dc5f
Notes: sideshowbarker 2024-07-19 11:44:49 +09:00
2 changed files with 22 additions and 4 deletions
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24
Libraries/LibHTML/Layout/LayoutText.cpp
View file

@ -48,13 +48,13 @@ void LayoutText::render_fragment(RenderingContext& context, const LineBoxFragmen
if (is_underline)
painter.draw_line(fragment.rect().bottom_left().translated(0, -1), fragment.rect().bottom_right().translated(0, -1), color);
painter.draw_text(fragment.rect(), node().data().substring_view(fragment.start(), fragment.length()), TextAlignment::TopLeft, color);
painter.draw_text(fragment.rect(), m_text_for_rendering.substring_view(fragment.start(), fragment.length()), TextAlignment::TopLeft, color);
}
template<typename Callback>
void LayoutText::for_each_word(Callback callback) const
{
Utf8View view(node().data());
Utf8View view(m_text_for_rendering);
if (view.is_empty())
return;
@ -90,7 +90,7 @@ void LayoutText::for_each_word(Callback callback) const
template<typename Callback>
void LayoutText::for_each_source_line(Callback callback) const
{
Utf8View view(node().data());
Utf8View view(m_text_for_rendering);
if (view.is_empty())
return;
@ -133,6 +133,7 @@ void LayoutText::split_into_lines(LayoutBlock& container)
bool is_preformatted = style().string_or_fallback(CSS::PropertyID::WhiteSpace, "normal") == "pre";
if (is_preformatted) {
m_text_for_rendering = node().data();
for_each_source_line([&](const Utf8View& view, int start, int length) {
line_boxes.last().add_fragment(*this, start, length, font.width(view), line_height);
line_boxes.append(LineBox());
@ -140,6 +141,21 @@ void LayoutText::split_into_lines(LayoutBlock& container)
return;
}
// Collapse whitespace into single spaces
auto& raw_text = node().data();
StringBuilder builder(raw_text.length());
for (int i = 0; i < raw_text.length(); ++i) {
if (!isspace(raw_text[i])) {
builder.append(raw_text[i]);
} else {
builder.append(' ');
while (i < raw_text.length() && isspace(raw_text[i]))
++i;
--i;
}
}
m_text_for_rendering = builder.to_string();
struct Word {
Utf8View view;
int start;
@ -170,7 +186,7 @@ void LayoutText::split_into_lines(LayoutBlock& container)
if (is_whitespace && line_boxes.last().fragments().is_empty())
continue;
line_boxes.last().add_fragment(*this, word.start, word.length, word_width, line_height);
line_boxes.last().add_fragment(*this, word.start, is_whitespace ? 1 : word.length, word_width, line_height);
available_width -= word_width;
if (available_width < 0) {

2
Libraries/LibHTML/Layout/LayoutText.h
View file

@ -28,4 +28,6 @@ private:
void for_each_word(Callback) const;
template<typename Callback>
void for_each_source_line(Callback) const;
String m_text_for_rendering;
};