#include "frontends/FontMetrics.h"
+#include "support/Cache.h"
#include "support/docstring.h"
-#include <QByteArray>
-#include <QCache>
#include <QFont>
#include <QFontMetrics>
#include <QHash>
#include <QTextLayout>
+#include <memory>
+
namespace lyx {
namespace frontend {
int & width,
int & ascent,
int & descent) const;
+
+ int countExpanders(docstring const & str) const;
///
int width(QString const & str) const;
+ /// Return a pointer to a cached QTextLayout object
+ std::shared_ptr<QTextLayout const>
+ getTextLayout(docstring const & s, bool const rtl,
+ double const wordspacing) const;
+
private:
- QTextLayout const &
- getTextLayout(docstring const & s, QFont font,
- bool const rtl, double const wordspacing) const;
+ std::pair<int, int> breakAt_helper(docstring const & s, int const x,
+ bool const rtl, bool const force) const;
/// The font
QFont font_;
/// Cache of char widths
mutable QHash<char_type, int> width_cache_;
-
/// Cache of string widths
- mutable QCache<QByteArray, int> strwidth_cache_;
+ mutable Cache<docstring, int> strwidth_cache_;
+ /// Cache for breakAt
+ mutable Cache<docstring, std::pair<int, int>> breakat_cache_;
+ /// Cache for QTextLayout
+ mutable Cache<docstring, std::shared_ptr<QTextLayout>> qtextlayout_cache_;
struct AscendDescend {
int ascent;
/// Cache of char right bearings
mutable QHash<char_type, int> rbearing_cache_;
- // A trivial QTextLayout cache
- mutable QTextLayout tl_cache_;
- mutable docstring tl_cache_s_;
- mutable QFont tl_cache_font_;
- mutable bool tl_cache_rtl_;
- mutable double tl_cache_wordspacing_;
-
};
} // namespace frontend