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LibHTML: Insert a new linebox for every newline in "white-space: pre"

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This commit is contained in:
Andreas Kling 2019-12-18 12:44:16 +01:00
parent 1fda417f4f
commit 0d6f186397
Notes: sideshowbarker 2024-07-19 10:49:19 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/0d6f1863973
2 changed files with 13 additions and 18 deletions
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27
Libraries/LibHTML/Layout/LayoutText.cpp
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@ -95,9 +95,12 @@ void LayoutText::for_each_word(Callback callback) const
commit_word(view.end());
}
template<typename Callback>
void LayoutText::for_each_source_line(Callback callback) const
void LayoutText::split_preformatted_into_lines(LayoutBlock& container)
{
auto& font = style().font();
auto& line_boxes = container.line_boxes();
m_text_for_rendering = node().data();
Utf8View view(m_text_for_rendering);
if (view.is_empty())
return;
@ -107,7 +110,8 @@ void LayoutText::for_each_source_line(Callback callback) const
auto commit_line = [&](auto it) {
int start = view.byte_offset_of(start_of_line);
int length = view.byte_offset_of(it) - view.byte_offset_of(start_of_line);
callback(view.substring_view(start, length), start, length);
if (length > 0)
line_boxes.last().add_fragment(*this, start, length, font.width(view), font.glyph_height());
};
bool last_was_newline = false;
@ -115,6 +119,7 @@ void LayoutText::for_each_source_line(Callback callback) const
bool did_commit = false;
if (*it == '\n') {
commit_line(it);
line_boxes.append(LineBox());
did_commit = true;
last_was_newline = true;
} else {
@ -138,20 +143,10 @@ void LayoutText::split_into_lines(LayoutBlock& container)
line_boxes.append(LineBox());
float available_width = container.width() - line_boxes.last().width();
bool is_preformatted = style().string_or_fallback(CSS::PropertyID::WhiteSpace, "normal") == "pre";
if (is_preformatted) {
m_text_for_rendering = node().data();
int line_count = 0;
for_each_source_line([&](const Utf8View& view, int start, int length) {
if (line_count == 1)
line_boxes.append(LineBox());
line_boxes.last().add_fragment(*this, start, length, font.width(view), font.glyph_height());
if (line_count != 0 && line_boxes.last().width() > 0)
line_boxes.append(LineBox());
++line_count;
});
if (style().string_or_fallback(CSS::PropertyID::WhiteSpace, "normal") == "pre") {
split_preformatted_into_lines(container);
return;
}
}
// Collapse whitespace into single spaces
auto utf8_view = Utf8View(node().data());

4
Libraries/LibHTML/Layout/LayoutText.h
View File

@ -25,10 +25,10 @@ public:
const StyleProperties& style() const { return parent()->style(); }
private:
void split_preformatted_into_lines(LayoutBlock& container);
template<typename Callback>
void for_each_word(Callback) const;
template<typename Callback>
void for_each_source_line(Callback) const;
String m_text_for_rendering;
};