74 lines
1.7 KiB
C++
74 lines
1.7 KiB
C++
#include "dynamic_buffer_iterator.hh"
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namespace Kakoune
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{
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DynamicBufferIterator::DynamicBufferIterator(const Buffer& buffer,
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BufferPos position)
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: BufferIterator(buffer, position)
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{
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register_ifp();
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}
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DynamicBufferIterator::DynamicBufferIterator(DynamicBufferIterator&& other)
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: BufferIterator(other)
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{
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register_ifp();
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}
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DynamicBufferIterator::DynamicBufferIterator(const BufferIterator& other)
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: BufferIterator(other)
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{
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register_ifp();
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}
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DynamicBufferIterator& DynamicBufferIterator::operator=(const BufferIterator& other)
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{
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unregister_ifn();
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BufferIterator::operator=(other);
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register_ifp();
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return *this;
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}
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DynamicBufferIterator::~DynamicBufferIterator()
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{
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unregister_ifn();
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}
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void DynamicBufferIterator::on_modification(const Modification& modification)
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{
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if (*this < modification.position)
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return;
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size_t length = modification.content.length();
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if (modification.type == Modification::Erase)
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{
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// do not move length on the other side of the inequality,
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// as modification.position + length may be after buffer end
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if (*this - length <= modification.position)
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BufferIterator::operator=(modification.position);
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else
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*this -= length;
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}
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else
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{
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assert(modification.type == Modification::Insert);
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*this += length;
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}
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}
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void DynamicBufferIterator::register_ifp()
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{
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if (is_valid())
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const_cast<Buffer&>(buffer()).register_modification_listener(this);
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}
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void DynamicBufferIterator::unregister_ifn()
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{
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if (is_valid())
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const_cast<Buffer&>(buffer()).unregister_modification_listener(this);
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}
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}
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