167 lines
3.8 KiB
C++
167 lines
3.8 KiB
C++
#ifndef UTF8DOCUMENTITERATOR_H_3452843291318441149
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#define UTF8DOCUMENTITERATOR_H_3452843291318441149
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#include <stdlib.h>
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#include <iterator>
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#include <vector>
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#include "Platform.h"
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#include "SplitVector.h"
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#include "Partitioning.h"
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#include "RunStyles.h"
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#include "CellBuffer.h"
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#include "CharClassify.h"
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#include "Decoration.h"
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#include <ILexer.h>
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#include "CaseFolder.h"
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#include <Document.h>
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#ifdef SCI_NAMESPACE
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namespace Scintilla {
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#endif
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class UTF8DocumentIterator : public std::iterator<std::bidirectional_iterator_tag, wchar_t>
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{
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public:
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UTF8DocumentIterator() :
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m_doc(0),
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m_pos(0),
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m_end(0),
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m_characterIndex(0),
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m_utf8Length(0),
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m_utf16Length(0)
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{
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}
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UTF8DocumentIterator(Document* doc, int pos, int end) :
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m_doc(doc),
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m_pos(pos),
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m_end(end),
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m_characterIndex(0)
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{
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// Check for debug builds
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PLATFORM_ASSERT(m_pos <= m_end);
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// Ensure for release.
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if (m_pos > m_end)
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{
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m_pos = m_end;
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}
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readCharacter();
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}
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UTF8DocumentIterator(const UTF8DocumentIterator& copy) :
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m_doc(copy.m_doc),
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m_pos(copy.m_pos),
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m_end(copy.m_end),
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m_characterIndex(copy.m_characterIndex),
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m_utf8Length(copy.m_utf8Length),
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m_utf16Length(copy.m_utf16Length)
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{
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// Check for debug builds
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PLATFORM_ASSERT(m_pos <= m_end);
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m_character[0] = copy.m_character[0];
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m_character[1] = copy.m_character[1];
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// Ensure for release.
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if (m_pos > m_end)
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{
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m_pos = m_end;
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}
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}
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bool operator == (const UTF8DocumentIterator& other) const
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{
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return (ended() == other.ended()) && (m_doc == other.m_doc) && (m_pos == other.m_pos);
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}
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bool operator != (const UTF8DocumentIterator& other) const
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{
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return !(*this == other);
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}
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wchar_t operator * () const
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{
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return m_character[m_characterIndex];
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}
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UTF8DocumentIterator& operator = (int other)
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{
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m_pos = other;
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return *this;
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}
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UTF8DocumentIterator& operator ++ ()
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{
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PLATFORM_ASSERT(m_pos < m_end);
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if (2 == m_utf16Length && 0 == m_characterIndex)
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{
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m_characterIndex = 1;
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}
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else
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{
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m_pos += m_utf8Length;
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if (m_pos > m_end)
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{
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m_pos = m_end;
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}
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m_characterIndex = 0;
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readCharacter();
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}
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return *this;
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}
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UTF8DocumentIterator& operator -- ()
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{
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if (m_utf16Length == 2 && m_characterIndex == 1)
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{
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m_characterIndex = 0;
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}
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else
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{
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--m_pos;
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// Skip past the UTF-8 extension bytes
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while (0x80 == (m_doc->CharAt(m_pos) & 0xC0) && m_pos > 0)
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--m_pos;
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readCharacter();
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if (m_utf16Length == 2)
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{
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m_characterIndex = 1;
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}
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}
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return *this;
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}
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int pos() const
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{
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return m_pos;
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}
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private:
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void readCharacter();
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bool ended() const
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{
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return m_pos >= m_end;
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}
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int m_pos;
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wchar_t m_character[2];
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int m_characterIndex;
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int m_end;
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int m_utf8Length;
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int m_utf16Length;
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Document* m_doc;
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static const unsigned char m_firstByteMask[];
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};
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#ifdef SCI_NAMESPACE
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}
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#endif
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#endif // UTF8DOCUMENTITERATOR_H_3452843291318441149
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