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LibWeb: Improve support for white-space CSS property (#2348)

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Add reasonable support for all values of white-space CSS property.

Values of the property are translated into a 3-tuple of rules:

    do_collapse:        whether whitespace is to be collapsed
    do_wrap_lines:      whether to wrap on word boundaries when
                        lines get too long
    do_wrap_breaks:     whether to wrap on linebreaks

The previously separate handling of per-line splitting and per-word
splitting have been unified. The Word structure is now a more
general Chunk, which represents different amounts of text depending
on splitting rules.
This commit is contained in:
Jack Byrne 2020-05-24 08:49:02 +01:00 • committed by GitHub
parent 3f2158bbfe
commit 58480a510f
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 114 additions and 98 deletions
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4
Libraries/LibWeb/Layout/LayoutText.h
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@ -53,10 +53,10 @@ public:
const StyleProperties& style() const { return parent()->style(); }
private:
void split_preformatted_into_lines(LayoutBlock& container);
void split_into_lines_by_rules(LayoutBlock& container, bool do_collapse, bool do_wrap_lines, bool do_wrap_breaks);
template<typename Callback>
void for_each_word(Callback) const;
void for_each_chunk(Callback, bool do_wrap_lines, bool do_wrap_breaks) const;
String m_text_for_rendering;
};