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LibWeb: Make whitespace collapsing stateless

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Previously, the whitespace collapsing code had a parameter telling it
whether the previous text node ended in whitespace. This was not
actually necessary, so let's get rid of it.
This commit is contained in:
Andreas Kling 2022-03-27 21:14:10 +02:00
parent 66582a875f
commit 4575ab558b
Notes: sideshowbarker 2024-07-17 16:38:55 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/4575ab558b
4 changed files with 10 additions and 19 deletions
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11
Userland/Libraries/LibWeb/Layout/InlineLevelIterator.cpp
View file

@ -123,11 +123,8 @@ Optional<InlineLevelIterator::Item> InlineLevelIterator::next(float available_wi
if (is<Layout::TextNode>(*m_current_node)) {
auto& text_node = static_cast<Layout::TextNode const&>(*m_current_node);
if (!m_text_node_context.has_value()) {
auto& line_boxes = m_formatting_state.get(m_container).line_boxes;
bool previous_is_empty_or_ends_in_whitespace = line_boxes.is_empty() || line_boxes.last().is_empty_or_ends_in_whitespace();
enter_text_node(text_node, previous_is_empty_or_ends_in_whitespace);
}
if (!m_text_node_context.has_value())
enter_text_node(text_node);
auto chunk_opt = m_text_node_context->next_chunk;
if (!chunk_opt.has_value()) {
@ -225,7 +222,7 @@ Optional<InlineLevelIterator::Item> InlineLevelIterator::next(float available_wi
return item;
}
void InlineLevelIterator::enter_text_node(Layout::TextNode const& text_node, bool previous_is_empty_or_ends_in_whitespace)
void InlineLevelIterator::enter_text_node(Layout::TextNode const& text_node)
{
bool do_collapse = true;
bool do_wrap_lines = true;
@ -250,7 +247,7 @@ void InlineLevelIterator::enter_text_node(Layout::TextNode const& text_node, boo
}
// FIXME: The const_cast here is gross.
const_cast<TextNode&>(text_node).compute_text_for_rendering(do_collapse, previous_is_empty_or_ends_in_whitespace);
const_cast<TextNode&>(text_node).compute_text_for_rendering(do_collapse);
m_text_node_context = TextNodeContext {
.do_collapse = do_collapse,

2
Userland/Libraries/LibWeb/Layout/InlineLevelIterator.h
View file

@ -56,7 +56,7 @@ private:
void skip_to_next();
void compute_next();
void enter_text_node(Layout::TextNode const&, bool previous_is_empty_or_ends_in_whitespace);
void enter_text_node(Layout::TextNode const&);
void enter_node_with_box_model_metrics(Layout::NodeWithStyleAndBoxModelMetrics const&);
void exit_node_with_box_model_metrics();

14
Userland/Libraries/LibWeb/Layout/TextNode.cpp
View file

@ -32,8 +32,8 @@ static bool is_all_whitespace(StringView string)
return true;
}
// NOTE: This collapes whitespace into a single ASCII space if collapse is true. If previous_is_empty_or_ends_in_whitespace, it also strips leading whitespace.
void TextNode::compute_text_for_rendering(bool collapse, bool previous_is_empty_or_ends_in_whitespace)
// NOTE: This collapses whitespace into a single ASCII space if collapse is true.
void TextNode::compute_text_for_rendering(bool collapse)
{
auto& data = dom_node().data();
if (!collapse || data.is_empty()) {
@ -44,12 +44,8 @@ void TextNode::compute_text_for_rendering(bool collapse, bool previous_is_empty_
// NOTE: A couple fast returns to avoid unnecessarily allocating a StringBuilder.
if (data.length() == 1) {
if (is_ascii_space(data[0])) {
if (previous_is_empty_or_ends_in_whitespace)
m_text_for_rendering = String::empty();
else {
static String s_single_space_string = " ";
m_text_for_rendering = s_single_space_string;
}
static String s_single_space_string = " ";
m_text_for_rendering = s_single_space_string;
} else {
m_text_for_rendering = data;
}
@ -76,8 +72,6 @@ void TextNode::compute_text_for_rendering(bool collapse, bool previous_is_empty_
++index;
};
if (previous_is_empty_or_ends_in_whitespace)
skip_over_whitespace();
while (index < data.length()) {
if (is_ascii_space(data[index])) {
builder.append(' ');

2
Userland/Libraries/LibWeb/Layout/TextNode.h
View file

@ -46,7 +46,7 @@ public:
Utf8View::Iterator m_iterator;
};
void compute_text_for_rendering(bool collapse, bool previous_is_empty_or_ends_in_whitespace);
void compute_text_for_rendering(bool collapse);
virtual RefPtr<Painting::Paintable> create_paintable() const override;