313 lines
8.5 KiB
C++
313 lines
8.5 KiB
C++
#include "display_buffer.hh"
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#include "assert.hh"
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#include "buffer.hh"
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#include "buffer_utils.hh"
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#include "utf8.hh"
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#include "face_registry.hh"
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namespace Kakoune
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{
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BufferIterator get_iterator(const Buffer& buffer, BufferCoord coord)
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{
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// Correct one past the end of line as next line
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if (not buffer.is_end(coord) and coord.column == buffer[coord.line].length())
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coord = coord.line+1;
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return buffer.iterator_at(coord);
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}
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StringView DisplayAtom::content() const
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{
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switch (m_type)
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{
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case Range:
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{
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auto line = (*m_buffer)[m_range.begin.line];
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if (m_range.begin.line == m_range.end.line)
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return line.substr(m_range.begin.column, m_range.end.column - m_range.begin.column);
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else if (m_range.begin.line+1 == m_range.end.line and m_range.end.column == 0)
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return line.substr(m_range.begin.column);
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break;
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}
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case Text:
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case ReplacedRange:
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return m_text;
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}
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kak_assert(false);
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return {};
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}
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ColumnCount DisplayAtom::length() const
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{
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switch (m_type)
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{
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case Range:
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return utf8::column_distance(get_iterator(*m_buffer, m_range.begin),
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get_iterator(*m_buffer, m_range.end));
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case Text:
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case ReplacedRange:
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return m_text.column_length();
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}
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kak_assert(false);
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return 0;
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}
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void DisplayAtom::trim_begin(ColumnCount count)
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{
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if (m_type == Range)
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m_range.begin = utf8::advance(get_iterator(*m_buffer, m_range.begin),
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get_iterator(*m_buffer, m_range.end),
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count).coord();
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else
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m_text = m_text.substr(count).str();
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}
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void DisplayAtom::trim_end(ColumnCount count)
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{
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if (m_type == Range)
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m_range.end = utf8::advance(get_iterator(*m_buffer, m_range.end),
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get_iterator(*m_buffer, m_range.begin),
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-count).coord();
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else
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m_text = m_text.substr(0, m_text.column_length() - count).str();
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}
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DisplayLine::DisplayLine(AtomList atoms)
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: m_atoms(std::move(atoms))
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{
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compute_range();
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}
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DisplayLine::iterator DisplayLine::split(iterator it, BufferCoord pos)
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{
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kak_assert(it->type() == DisplayAtom::Range);
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kak_assert(it->begin() < pos);
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kak_assert(it->end() > pos);
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DisplayAtom atom = *it;
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atom.m_range.end = pos;
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it->m_range.begin = pos;
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return m_atoms.insert(it, std::move(atom));
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}
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DisplayLine::iterator DisplayLine::split(iterator it, ColumnCount pos)
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{
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kak_assert(it->type() == DisplayAtom::Text);
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kak_assert(pos > 0);
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kak_assert(pos < it->length());
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DisplayAtom atom(it->m_text.substr(0, pos).str());
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it->m_text = it->m_text.substr(pos).str();
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return m_atoms.insert(it, std::move(atom));
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}
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DisplayLine::iterator DisplayLine::insert(iterator it, DisplayAtom atom)
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{
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if (atom.has_buffer_range())
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{
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m_range.begin = std::min(m_range.begin, atom.begin());
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m_range.end = std::max(m_range.end, atom.end());
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}
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return m_atoms.insert(it, std::move(atom));
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}
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void DisplayLine::push_back(DisplayAtom atom)
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{
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if (atom.has_buffer_range())
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{
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m_range.begin = std::min(m_range.begin, atom.begin());
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m_range.end = std::max(m_range.end, atom.end());
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}
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m_atoms.push_back(std::move(atom));
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}
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DisplayLine::iterator DisplayLine::erase(iterator beg, iterator end)
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{
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auto res = m_atoms.erase(beg, end);
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compute_range();
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return res;
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}
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void DisplayLine::optimize()
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{
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if (m_atoms.empty())
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return;
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auto atom_it = m_atoms.begin();
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auto next_atom_it = atom_it + 1;
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while (next_atom_it != m_atoms.end())
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{
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auto& atom = *atom_it;
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auto& next_atom = *next_atom_it;
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bool merged = false;
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if (atom.face == next_atom.face and
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atom.type() == next_atom.type())
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{
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auto type = atom.type();
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if ((type == DisplayAtom::Range or
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type == DisplayAtom::ReplacedRange) and
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next_atom.begin() == atom.end())
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{
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atom.m_range.end = next_atom.end();
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if (type == DisplayAtom::ReplacedRange)
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atom.m_text += next_atom.m_text;
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merged = true;
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}
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if (type == DisplayAtom::Text)
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{
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atom.m_text += next_atom.m_text;
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merged = true;
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}
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}
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if (merged)
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next_atom_it = m_atoms.erase(next_atom_it);
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else
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atom_it = next_atom_it++;
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}
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}
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ColumnCount DisplayLine::length() const
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{
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ColumnCount len = 0;
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for (auto& atom : m_atoms)
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len += atom.length();
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return len;
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}
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void DisplayLine::trim(ColumnCount first_col, ColumnCount col_count)
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{
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for (auto it = begin(); first_col > 0 and it != end(); )
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{
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auto len = it->length();
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if (len <= first_col)
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{
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m_atoms.erase(it);
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first_col -= len;
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}
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else
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{
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it->trim_begin(first_col);
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first_col = 0;
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}
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}
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auto it = begin();
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for (; it != end() and col_count > 0; ++it)
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col_count -= it->length();
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if (col_count < 0)
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(it-1)->trim_end(-col_count);
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m_atoms.erase(it, end());
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compute_range();
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}
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const BufferRange init_range{ {INT_MAX, INT_MAX}, {INT_MIN, INT_MIN} };
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void DisplayLine::compute_range()
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{
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m_range = init_range;
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for (auto& atom : m_atoms)
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{
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if (not atom.has_buffer_range())
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continue;
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m_range.begin = std::min(m_range.begin, atom.begin());
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m_range.end = std::max(m_range.end, atom.end());
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}
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if (m_range == init_range)
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m_range = { { 0, 0 }, { 0, 0 } };
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kak_assert(m_range.begin <= m_range.end);
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}
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void DisplayBuffer::compute_range()
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{
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m_range = init_range;
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for (auto& line : m_lines)
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{
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m_range.begin = std::min(line.range().begin, m_range.begin);
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m_range.end = std::max(line.range().end, m_range.end);
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}
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if (m_range == init_range)
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m_range = { { 0, 0 }, { 0, 0 } };
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kak_assert(m_range.begin <= m_range.end);
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}
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void DisplayBuffer::optimize()
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{
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for (auto& line : m_lines)
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line.optimize();
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}
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DisplayLine parse_display_line(StringView line, const HashMap<String, DisplayLine>& builtins)
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{
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DisplayLine res;
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bool was_antislash = false;
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auto pos = line.begin();
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String content;
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Face face;
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for (auto it = line.begin(), end = line.end(); it != end; ++it)
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{
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const char c = *it;
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if (c == '{')
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{
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if (was_antislash)
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{
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content += StringView{pos, it};
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content.back() = '{';
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pos = it + 1;
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}
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else
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{
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content += StringView{pos, it};
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res.push_back({std::move(content), face});
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content.clear();
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auto closing = std::find(it+1, end, '}');
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if (closing == end)
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throw runtime_error("unclosed face definition");
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if (*(it+1) == '{' and closing+1 != end and *(closing+1) == '}')
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{
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auto builtin_it = builtins.find(StringView{it+2, closing});
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if (builtin_it == builtins.end())
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throw runtime_error(format("undefined atom {}", StringView{it+2, closing}));
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for (auto& atom : builtin_it->value)
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res.push_back(atom);
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// closing is now at the first char of "}}", advance it to the second
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++closing;
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}
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else
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face = get_face({it+1, closing});
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it = closing;
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pos = closing + 1;
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}
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}
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if (c == '\n') // line breaks are forbidden, replace with space
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{
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content += StringView{pos, it+1};
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content.back() = ' ';
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pos = it + 1;
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}
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if (c == '\\')
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{
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if (was_antislash)
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{
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content += StringView{pos, it};
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pos = it + 1;
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was_antislash = false;
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}
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else
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was_antislash = true;
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}
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else
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was_antislash = false;
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}
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content += StringView{pos, line.end()};
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if (not content.empty())
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res.push_back({std::move(content), face});
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return res;
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}
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}
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