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