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/** @file RunStyles.h
** Data structure used to store sparse styles.
**/
// Copyright 1998-2007 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
/// Styling buffer using one element for each run rather than using
/// a filled buffer.
#ifndef RUNSTYLES_H
#define RUNSTYLES_H
namespace Scintilla::Internal {
// Return for RunStyles::FillRange reports if anything was changed and the
// range that was changed. This may be trimmed from the requested range
// when some of the requested range already had the requested value.
template <typename DISTANCE>
struct FillResult {
bool changed;
DISTANCE position;
DISTANCE fillLength;
};
template <typename DISTANCE, typename STYLE>
class RunStyles {
private:
Partitioning<DISTANCE> starts;
SplitVector<STYLE> styles;
DISTANCE RunFromPosition(DISTANCE position) const noexcept;
DISTANCE SplitRun(DISTANCE position);
void RemoveRun(DISTANCE run);
void RemoveRunIfEmpty(DISTANCE run);
void RemoveRunIfSameAsPrevious(DISTANCE run);
public:
RunStyles();
DISTANCE Length() const noexcept;
STYLE ValueAt(DISTANCE position) const noexcept;
DISTANCE FindNextChange(DISTANCE position, DISTANCE end) const noexcept;
DISTANCE StartRun(DISTANCE position) const noexcept;
DISTANCE EndRun(DISTANCE position) const noexcept;
// Returns changed=true if some values may have changed
FillResult<DISTANCE> FillRange(DISTANCE position, STYLE value, DISTANCE fillLength);
void SetValueAt(DISTANCE position, STYLE value);
void InsertSpace(DISTANCE position, DISTANCE insertLength);
void DeleteAll();
void DeleteRange(DISTANCE position, DISTANCE deleteLength);
DISTANCE Runs() const noexcept;
bool AllSame() const noexcept;
bool AllSameAs(STYLE value) const noexcept;
DISTANCE Find(STYLE value, DISTANCE start) const noexcept;
void Check() const;
};
}
#endif
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