148 lines
3.5 KiB
C++
148 lines
3.5 KiB
C++
#ifndef display_buffer_hh_INCLUDED
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#define display_buffer_hh_INCLUDED
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#include "face.hh"
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#include "coord.hh"
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#include "string.hh"
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#include "vector.hh"
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namespace Kakoune
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{
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class Buffer;
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struct DisplayAtom
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{
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public:
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enum Type { BufferRange, ReplacedBufferRange, Text };
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DisplayAtom(const Buffer& buffer, ByteCoord begin, ByteCoord end)
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: m_type(BufferRange), m_buffer(&buffer), m_begin(begin), m_end(end)
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{ check_invariant(); }
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DisplayAtom(String str, Face face = Face{})
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: m_type(Text), m_text(std::move(str)), face(face)
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{ check_invariant(); }
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StringView content() const;
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CharCount length() const;
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const ByteCoord& begin() const
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{
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kak_assert(has_buffer_range());
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return m_begin;
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}
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const ByteCoord& end() const
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{
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kak_assert(has_buffer_range());
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return m_end;
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}
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void replace(String text)
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{
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kak_assert(m_type == BufferRange);
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m_type = ReplacedBufferRange;
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m_text = std::move(text);
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}
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bool has_buffer_range() const
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{
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return m_type == BufferRange or m_type == ReplacedBufferRange;
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}
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const Buffer& buffer() const { kak_assert(m_buffer); return *m_buffer; }
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Type type() const { return m_type; }
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void trim_begin(CharCount count);
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void trim_end(CharCount count);
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void check_invariant() const;
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bool operator==(const DisplayAtom& other) const
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{
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return face == other.face and content() == other.content();
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}
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public:
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Face face;
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private:
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friend class DisplayLine;
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Type m_type;
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const Buffer* m_buffer = nullptr;
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ByteCoord m_begin;
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ByteCoord m_end;
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String m_text;
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};
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using BufferRange = std::pair<ByteCoord, ByteCoord>;
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using AtomList = Vector<DisplayAtom>;
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class DisplayLine
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{
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public:
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using iterator = AtomList::iterator;
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using const_iterator = AtomList::const_iterator;
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using value_type = AtomList::value_type;
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DisplayLine() = default;
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DisplayLine(AtomList atoms);
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DisplayLine(String str, Face face)
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{ push_back({ std::move(str), face }); }
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iterator begin() { return m_atoms.begin(); }
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iterator end() { return m_atoms.end(); }
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const_iterator begin() const { return m_atoms.begin(); }
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const_iterator end() const { return m_atoms.end(); }
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const AtomList& atoms() const { return m_atoms; }
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CharCount length() const;
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const BufferRange& range() const { return m_range; }
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// Split atom pointed by it at pos, returns an iterator to the first atom
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iterator split(iterator it, ByteCoord pos);
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iterator insert(iterator it, DisplayAtom atom);
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iterator erase(iterator beg, iterator end);
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void push_back(DisplayAtom atom);
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// remove first_char from the begining of the line, and make sure
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// the line is less that char_count character
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void trim(CharCount first_char, CharCount char_count);
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void optimize();
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private:
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void compute_range();
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BufferRange m_range = { { INT_MAX, INT_MAX }, { INT_MIN, INT_MIN } };
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AtomList m_atoms;
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};
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class DisplayBuffer
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{
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public:
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using LineList = Vector<DisplayLine>;
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DisplayBuffer() {}
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LineList& lines() { return m_lines; }
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const LineList& lines() const { return m_lines; }
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// returns the smallest BufferRange which contains every DisplayAtoms
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const BufferRange& range() const { return m_range; }
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void optimize();
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void compute_range();
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private:
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LineList m_lines;
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BufferRange m_range;
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};
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}
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#endif // display_buffer_hh_INCLUDED
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