mirror of
https://github.com/mawww/kakoune.git
synced 2024-12-25 04:24:48 +03:00
704 lines
21 KiB
C++
704 lines
21 KiB
C++
#include "buffer.hh"
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#include "assert.hh"
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#include "buffer_manager.hh"
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#include "client.hh"
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#include "containers.hh"
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#include "context.hh"
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#include "diff.hh"
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#include "file.hh"
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#include "shared_string.hh"
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#include "unit_tests.hh"
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#include "utils.hh"
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#include "window.hh"
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#include <algorithm>
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namespace Kakoune
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{
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struct ParsedLines
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{
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BufferLines lines;
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ByteOrderMark bom = ByteOrderMark::None;
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EolFormat eolformat = EolFormat::Lf;
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};
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static ParsedLines parse_lines(StringView data)
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{
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ParsedLines res;
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const char* pos = data.begin();
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if (data.substr(0, 3_byte) == "\xEF\xBB\xBF")
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{
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res.bom = ByteOrderMark::Utf8;
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pos = data.begin() + 3;
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}
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while (pos < data.end())
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{
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const char* line_end = pos;
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while (line_end < data.end() and *line_end != '\r' and *line_end != '\n')
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++line_end;
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res.lines.emplace_back(StringData::create({pos, line_end}, '\n'));
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if (line_end+1 != data.end() and *line_end == '\r' and *(line_end+1) == '\n')
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{
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res.eolformat = EolFormat::Crlf;
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pos = line_end + 2;
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}
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else
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pos = line_end + 1;
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}
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return res;
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}
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static void apply_options(OptionManager& options, const ParsedLines& parsed_lines)
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{
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options.get_local_option("eolformat").set(parsed_lines.eolformat);
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options.get_local_option("BOM").set(parsed_lines.bom);
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}
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Buffer::Buffer(String name, Flags flags, StringView data,
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timespec fs_timestamp)
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: Scope(GlobalScope::instance()),
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m_name((flags & Flags::File) ? real_path(parse_filename(name)) : std::move(name)),
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m_display_name((flags & Flags::File) ? compact_path(m_name) : m_name),
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m_flags(flags | Flags::NoUndo),
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m_history(), m_history_cursor(m_history.begin()),
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m_last_save_undo_index(0),
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m_fs_timestamp(fs_timestamp)
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{
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BufferManager::instance().register_buffer(*this);
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options().register_watcher(*this);
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ParsedLines parsed_lines = parse_lines(data);
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if (parsed_lines.lines.empty())
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parsed_lines.lines.emplace_back(StringData::create("\n"));
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#ifdef KAK_DEBUG
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for (auto& line : parsed_lines.lines)
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kak_assert(not (line->length == 0) and
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line->data()[line->length-1] == '\n');
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#endif
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static_cast<BufferLines&>(m_lines) = std::move(parsed_lines.lines);
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m_changes.push_back({ Change::Insert, true, {0,0}, line_count() });
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apply_options(options(), parsed_lines);
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if (flags & Flags::File)
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{
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if (flags & Flags::New)
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run_hook_in_own_context("BufNew", m_name);
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else
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{
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kak_assert(m_fs_timestamp != InvalidTime);
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run_hook_in_own_context("BufOpen", m_name);
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}
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}
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run_hook_in_own_context("BufCreate", m_name);
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// now we may begin to record undo data
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if (not (flags & Flags::NoUndo))
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m_flags &= ~Flags::NoUndo;
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for (auto& option : options().flatten_options())
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on_option_changed(*option);
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}
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Buffer::~Buffer()
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{
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run_hook_in_own_context("BufClose", m_name);
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options().unregister_watcher(*this);
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BufferManager::instance().unregister_buffer(*this);
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m_values.clear();
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}
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bool Buffer::set_name(String name)
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{
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Buffer* other = BufferManager::instance().get_buffer_ifp(name);
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if (other == nullptr or other == this)
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{
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if (m_flags & Flags::File)
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{
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m_name = real_path(name);
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m_display_name = compact_path(m_name);
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}
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else
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{
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m_name = std::move(name);
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m_display_name = m_name;
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}
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return true;
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}
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return false;
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}
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void Buffer::update_display_name()
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{
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if (m_flags & Flags::File)
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m_display_name = compact_path(m_name);
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}
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BufferIterator Buffer::iterator_at(ByteCoord coord) const
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{
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return is_end(coord) ? end() : BufferIterator(*this, clamp(coord));
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}
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ByteCoord Buffer::clamp(ByteCoord coord) const
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{
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coord.line = Kakoune::clamp(coord.line, 0_line, line_count() - 1);
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ByteCount max_col = std::max(0_byte, m_lines[coord.line].length() - 1);
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coord.column = Kakoune::clamp(coord.column, 0_byte, max_col);
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return coord;
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}
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ByteCoord Buffer::offset_coord(ByteCoord coord, CharCount offset)
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{
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StringView line = m_lines[coord.line];
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auto character = std::max(0_char, std::min(line.char_count_to(coord.column) + offset,
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line.char_length() - 1));
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return {coord.line, line.byte_count_to(character)};
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}
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ByteCoordAndTarget Buffer::offset_coord(ByteCoordAndTarget coord, LineCount offset)
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{
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auto character = coord.target == -1 ? m_lines[coord.line].char_count_to(coord.column) : coord.target;
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auto line = Kakoune::clamp(coord.line + offset, 0_line, line_count()-1);
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StringView content = m_lines[line];
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character = std::max(0_char, std::min(character, content.char_length() - 2));
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return {line, content.byte_count_to(character), character};
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}
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String Buffer::string(ByteCoord begin, ByteCoord end) const
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{
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String res;
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for (auto line = begin.line; line <= end.line and line < line_count(); ++line)
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{
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ByteCount start = 0;
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if (line == begin.line)
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start = begin.column;
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ByteCount count = -1;
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if (line == end.line)
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count = end.column - start;
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res += m_lines[line].substr(start, count);
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}
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return res;
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}
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// A Modification holds a single atomic modification to Buffer
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struct Buffer::Modification
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{
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enum Type { Insert, Erase };
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Type type;
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ByteCoord coord;
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StringDataPtr content;
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Modification(Type type, ByteCoord coord, StringDataPtr content)
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: type(type), coord(coord), content(std::move(content)) {}
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Modification inverse() const
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{
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return {type == Insert ? Erase : Insert, coord, content};
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}
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};
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void Buffer::reload(StringView data, timespec fs_timestamp)
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{
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ParsedLines parsed_lines = parse_lines(data);
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if (parsed_lines.lines.empty())
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parsed_lines.lines.emplace_back(StringData::create("\n"));
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const bool record_undo = not (m_flags & Flags::NoUndo);
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commit_undo_group();
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if (not record_undo)
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{
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m_changes.push_back({ Change::Erase, true, {0,0}, line_count() });
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static_cast<BufferLines&>(m_lines) = std::move(parsed_lines.lines);
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m_changes.push_back({ Change::Insert, true, {0,0}, line_count() });
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}
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else
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{
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auto diff = find_diff(m_lines.begin(), m_lines.size(),
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parsed_lines.lines.begin(), (int)parsed_lines.lines.size(),
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[](const StringDataPtr& lhs, const StringDataPtr& rhs)
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{ return lhs->hash == rhs->hash and lhs->strview() == rhs->strview(); });
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auto it = m_lines.begin();
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for (auto& d : diff)
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{
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if (d.mode == Diff::Keep)
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it += d.len;
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else if (d.mode == Diff::Add)
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{
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const LineCount cur_line = (int)(it - m_lines.begin());
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for (LineCount line = 0; line < d.len; ++line)
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m_current_undo_group.emplace_back(
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Modification::Insert, cur_line + line,
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parsed_lines.lines[(int)(d.posB + line)]);
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m_changes.push_back({ Change::Insert, it == m_lines.end(), cur_line, cur_line + d.len });
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m_lines.insert(it, &parsed_lines.lines[d.posB], &parsed_lines.lines[d.posB + d.len]);
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it = m_lines.begin() + (int)(cur_line + d.len);
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}
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else if (d.mode == Diff::Remove)
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{
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const LineCount cur_line = (int)(it - m_lines.begin());
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for (LineCount line = d.len-1; line >= 0; --line)
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m_current_undo_group.emplace_back(
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Modification::Erase, cur_line + line,
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m_lines.get_storage(cur_line + line));
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it = m_lines.erase(it, it + d.len);
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m_changes.push_back({ Change::Erase, it == m_lines.end(), cur_line, cur_line + d.len });
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}
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}
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}
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commit_undo_group();
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apply_options(options(), parsed_lines);
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m_last_save_undo_index = m_history_cursor - m_history.begin();
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m_fs_timestamp = fs_timestamp;
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}
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void Buffer::commit_undo_group()
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{
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if (m_flags & Flags::NoUndo)
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return;
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if (m_current_undo_group.empty())
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return;
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m_history.erase(m_history_cursor, m_history.end());
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m_history.push_back(std::move(m_current_undo_group));
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m_current_undo_group.clear();
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m_history_cursor = m_history.end();
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if (m_history.size() < m_last_save_undo_index)
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m_last_save_undo_index = -1;
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}
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bool Buffer::undo()
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{
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commit_undo_group();
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if (m_history_cursor == m_history.begin())
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return false;
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--m_history_cursor;
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for (const Modification& modification : *m_history_cursor | reverse())
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apply_modification(modification.inverse());
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return true;
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}
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bool Buffer::redo()
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{
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if (m_history_cursor == m_history.end())
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return false;
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kak_assert(m_current_undo_group.empty());
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for (const Modification& modification : *m_history_cursor)
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apply_modification(modification);
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++m_history_cursor;
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return true;
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}
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void Buffer::check_invariant() const
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{
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#ifdef KAK_DEBUG
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kak_assert(not m_lines.empty());
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for (auto& line : m_lines)
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{
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kak_assert(line->strview().length() > 0);
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kak_assert(line->strview().back() == '\n');
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}
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#endif
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}
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ByteCoord Buffer::do_insert(ByteCoord pos, StringView content)
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{
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kak_assert(is_valid(pos));
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if (content.empty())
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return pos;
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const bool at_end = is_end(pos);
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const bool append_lines = at_end and (m_lines.empty() or byte_at(back_coord()) == '\n');
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if (at_end)
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pos = append_lines ? line_count() : end_coord();
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const StringView prefix = at_end ?
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StringView{} : m_lines[pos.line].substr(0, pos.column);
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const StringView suffix = at_end ?
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StringView{} : m_lines[pos.line].substr(pos.column);
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LineList new_lines;
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ByteCount start = 0;
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for (ByteCount i = 0; i < content.length(); ++i)
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{
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if (content[i] == '\n')
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{
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StringView line = content.substr(start, i + 1 - start);
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new_lines.push_back(StringData::create(start == 0 ? prefix + line : line));
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start = i + 1;
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}
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}
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if (start == 0)
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new_lines.push_back(StringData::create(prefix + content + suffix));
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else if (start != content.length() or not suffix.empty())
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new_lines.push_back(StringData::create(content.substr(start) + suffix));
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auto line_it = m_lines.begin() + (int)pos.line;
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auto new_lines_it = new_lines.begin();
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if (not append_lines)
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*line_it++ = std::move(*new_lines_it++);
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m_lines.insert(line_it,
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std::make_move_iterator(new_lines_it),
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std::make_move_iterator(new_lines.end()));
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const LineCount last_line = pos.line + new_lines.size() - 1;
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const ByteCoord end = ByteCoord{ last_line, m_lines[last_line].length() - suffix.length() };
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m_changes.push_back({ Change::Insert, at_end, pos, end });
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return pos;
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}
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ByteCoord Buffer::do_erase(ByteCoord begin, ByteCoord end)
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{
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kak_assert(is_valid(begin));
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kak_assert(is_valid(end));
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StringView prefix = m_lines[begin.line].substr(0, begin.column);
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StringView suffix = m_lines[end.line].substr(end.column);
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String new_line = prefix + suffix;
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ByteCoord next;
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if (new_line.length() != 0)
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{
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m_lines.erase(m_lines.begin() + (int)begin.line, m_lines.begin() + (int)end.line);
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m_lines.get_storage(begin.line) = StringData::create(new_line);
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next = begin;
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}
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else
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{
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m_lines.erase(m_lines.begin() + (int)begin.line, m_lines.begin() + (int)end.line + 1);
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next = is_end(begin) ? end_coord() : ByteCoord{begin.line, 0};
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}
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m_changes.push_back({ Change::Erase, is_end(begin), begin, end });
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return next;
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}
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void Buffer::apply_modification(const Modification& modification)
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{
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StringView content = modification.content->strview();
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ByteCoord coord = modification.coord;
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kak_assert(is_valid(coord));
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// in modifications, end coords should be {line_count(), 0}
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kak_assert((m_lines.empty() and coord == ByteCoord{0,0} ) or
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coord != ByteCoord(line_count()-1, m_lines.back().length()));
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switch (modification.type)
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{
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case Modification::Insert:
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{
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do_insert(coord, content);
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break;
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}
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case Modification::Erase:
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{
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ByteCount count = content.length();
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ByteCoord end = advance(coord, count);
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kak_assert(string(coord, end) == content);
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do_erase(coord, end);
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break;
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}
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default:
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kak_assert(false);
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}
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}
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ByteCoord Buffer::insert(ByteCoord pos, StringView content)
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{
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kak_assert(is_valid(pos));
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if (content.empty())
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return pos;
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StringDataPtr real_content;
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if (is_end(pos) and content.back() != '\n')
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real_content = intern(content + "\n");
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else
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real_content = intern(content);
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// for undo and redo purpose it is better to use one past last line rather
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// than one past last char coord.
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auto coord = is_end(pos) ? ByteCoord{line_count()} : pos;
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if (not (m_flags & Flags::NoUndo))
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m_current_undo_group.emplace_back(Modification::Insert, coord, real_content);
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return do_insert(pos, real_content->strview());
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}
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ByteCoord Buffer::erase(ByteCoord begin, ByteCoord end)
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{
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kak_assert(is_valid(begin) and is_valid(end));
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// do not erase last \n except if we erase from the start of a line, and normalize
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// end coord
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if (is_end(end))
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end = (begin.column != 0 or begin == ByteCoord{0,0}) ? prev(end) : end_coord();
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if (begin >= end) // use >= to handle case where begin is {line_count}
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return begin;
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if (not (m_flags & Flags::NoUndo))
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m_current_undo_group.emplace_back(Modification::Erase, begin,
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intern(string(begin, end)));
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return do_erase(begin, end);
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}
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ByteCoord Buffer::replace(ByteCoord begin, ByteCoord end, StringView content)
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{
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if (not (m_flags & Flags::NoUndo))
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m_current_undo_group.emplace_back(Modification::Erase, begin,
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intern(string(begin, end)));
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auto pos = do_erase(begin, end);
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StringDataPtr real_content;
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if (is_end(pos) and content.back() != '\n')
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real_content = intern(content + "\n");
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else
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real_content = intern(content);
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auto coord = is_end(pos) ? ByteCoord{line_count()} : pos;
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if (not (m_flags & Flags::NoUndo))
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m_current_undo_group.emplace_back(Modification::Insert, coord, real_content);
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return do_insert(pos, real_content->strview());
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}
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bool Buffer::is_modified() const
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{
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size_t history_cursor_index = m_history_cursor - m_history.begin();
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return m_last_save_undo_index != history_cursor_index
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or not m_current_undo_group.empty();
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}
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void Buffer::notify_saved()
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{
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if (not m_current_undo_group.empty())
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commit_undo_group();
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m_flags &= ~Flags::New;
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size_t history_cursor_index = m_history_cursor - m_history.begin();
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if (m_last_save_undo_index != history_cursor_index)
|
|
m_last_save_undo_index = history_cursor_index;
|
|
m_fs_timestamp = get_fs_timestamp(m_name);
|
|
}
|
|
|
|
ByteCoord Buffer::advance(ByteCoord coord, ByteCount count) const
|
|
{
|
|
if (count > 0)
|
|
{
|
|
auto line = coord.line;
|
|
count += coord.column;
|
|
while (count >= m_lines[line].length())
|
|
{
|
|
count -= m_lines[line++].length();
|
|
if (line == line_count())
|
|
return end_coord();
|
|
}
|
|
return { line, count };
|
|
}
|
|
else if (count < 0)
|
|
{
|
|
auto line = coord.line;
|
|
count += coord.column;
|
|
while (count < 0)
|
|
{
|
|
count += m_lines[--line].length();
|
|
if (line < 0)
|
|
return {0, 0};
|
|
}
|
|
return { line, count };
|
|
}
|
|
return coord;
|
|
}
|
|
|
|
ByteCoord Buffer::char_next(ByteCoord coord) const
|
|
{
|
|
if (coord.column < m_lines[coord.line].length() - 1)
|
|
{
|
|
auto line = m_lines[coord.line];
|
|
coord.column += utf8::codepoint_size(line[coord.column]);
|
|
// Handle invalid utf-8
|
|
if (coord.column >= line.length())
|
|
{
|
|
++coord.line;
|
|
coord.column = 0;
|
|
}
|
|
}
|
|
else if (coord.line == m_lines.size() - 1)
|
|
coord.column = m_lines.back().length();
|
|
else
|
|
{
|
|
++coord.line;
|
|
coord.column = 0;
|
|
}
|
|
return coord;
|
|
}
|
|
|
|
ByteCoord Buffer::char_prev(ByteCoord coord) const
|
|
{
|
|
kak_assert(is_valid(coord));
|
|
if (is_end(coord))
|
|
return coord = {(int)m_lines.size()-1, m_lines.back().length() - 1};
|
|
else if (coord.column == 0)
|
|
{
|
|
if (coord.line > 0)
|
|
coord.column = m_lines[--coord.line].length() - 1;
|
|
}
|
|
else
|
|
{
|
|
auto line = m_lines[coord.line];
|
|
coord.column = (int)(utf8::character_start(line.begin() + (int)coord.column - 1, line.begin()) - line.begin());
|
|
}
|
|
return coord;
|
|
}
|
|
|
|
timespec Buffer::fs_timestamp() const
|
|
{
|
|
kak_assert(m_flags & Flags::File);
|
|
return m_fs_timestamp;
|
|
}
|
|
|
|
void Buffer::set_fs_timestamp(timespec ts)
|
|
{
|
|
kak_assert(m_flags & Flags::File);
|
|
m_fs_timestamp = ts;
|
|
}
|
|
|
|
void Buffer::on_option_changed(const Option& option)
|
|
{
|
|
run_hook_in_own_context("BufSetOption",
|
|
format("{}={}", option.name(), option.get_as_string()));
|
|
}
|
|
|
|
void Buffer::run_hook_in_own_context(StringView hook_name, StringView param)
|
|
{
|
|
InputHandler hook_handler({ *this, Selection{} }, Context::Flags::Transient);
|
|
hooks().run_hook(hook_name, param, hook_handler.context());
|
|
}
|
|
|
|
ByteCoord Buffer::last_modification_coord() const
|
|
{
|
|
if (m_history.empty())
|
|
return {};
|
|
return m_history.back().back().coord;
|
|
}
|
|
|
|
String Buffer::debug_description() const
|
|
{
|
|
size_t content_size = 0;
|
|
for (auto& line : m_lines)
|
|
content_size += (int)line->strview().length();
|
|
|
|
size_t additional_size = 0;
|
|
for (auto& undo_group : m_history)
|
|
additional_size += undo_group.size() * sizeof(Modification);
|
|
additional_size += m_changes.size() * sizeof(Change);
|
|
|
|
return format("{}\nFlags: {}{}{}{}\nUsed mem: content={} additional={}\n",
|
|
display_name(),
|
|
(m_flags & Flags::File) ? "File (" + name() + ") " : "",
|
|
(m_flags & Flags::New) ? "New " : "",
|
|
(m_flags & Flags::Fifo) ? "Fifo " : "",
|
|
(m_flags & Flags::NoUndo) ? "NoUndo " : "",
|
|
content_size, additional_size);
|
|
}
|
|
|
|
UnitTest test_buffer{[]()
|
|
{
|
|
Buffer empty_buffer("empty", Buffer::Flags::None, {});
|
|
|
|
Buffer buffer("test", Buffer::Flags::None, "allo ?\nmais que fais la police\n hein ?\n youpi\n");
|
|
kak_assert(buffer.line_count() == 4);
|
|
|
|
BufferIterator pos = buffer.begin();
|
|
kak_assert(*pos == 'a');
|
|
pos += 6;
|
|
kak_assert(pos.coord() == ByteCoord{0 COMMA 6});
|
|
++pos;
|
|
kak_assert(pos.coord() == ByteCoord{1 COMMA 0});
|
|
--pos;
|
|
kak_assert(pos.coord() == ByteCoord{0 COMMA 6});
|
|
pos += 1;
|
|
kak_assert(pos.coord() == ByteCoord{1 COMMA 0});
|
|
buffer.insert(pos.coord(), "tchou kanaky\n");
|
|
kak_assert(buffer.line_count() == 5);
|
|
BufferIterator pos2 = buffer.end();
|
|
pos2 -= 9;
|
|
kak_assert(*pos2 == '?');
|
|
|
|
String str = buffer.string({ 4, 1 }, buffer.next({ 4, 5 }));
|
|
kak_assert(str == "youpi");
|
|
|
|
// check insert at end behaviour: auto add end of line if necessary
|
|
pos = buffer.end()-1;
|
|
buffer.insert(pos.coord(), "tchou");
|
|
kak_assert(buffer.string(pos.coord(), buffer.end_coord()) == StringView{"tchou\n"});
|
|
|
|
pos = buffer.end()-1;
|
|
buffer.insert(buffer.end_coord(), "kanaky\n");
|
|
kak_assert(buffer.string((pos+1).coord(), buffer.end_coord()) == StringView{"kanaky\n"});
|
|
|
|
buffer.commit_undo_group();
|
|
buffer.erase((pos+1).coord(), buffer.end_coord());
|
|
buffer.insert(buffer.end_coord(), "mutch\n");
|
|
buffer.commit_undo_group();
|
|
buffer.undo();
|
|
kak_assert(buffer.string(buffer.advance(buffer.end_coord(), -7), buffer.end_coord()) == StringView{"kanaky\n"});
|
|
buffer.redo();
|
|
kak_assert(buffer.string(buffer.advance(buffer.end_coord(), -6), buffer.end_coord()) == StringView{"mutch\n"});
|
|
}};
|
|
|
|
UnitTest test_undo{[]()
|
|
{
|
|
Buffer buffer("test", Buffer::Flags::None, "allo ?\nmais que fais la police\n hein ?\n youpi\n");
|
|
auto pos = buffer.insert(buffer.end_coord(), "kanaky\n");
|
|
buffer.erase(pos, buffer.end_coord());
|
|
buffer.insert(2_line, "tchou\n");
|
|
buffer.insert(2_line, "mutch\n");
|
|
buffer.erase({2, 1}, {2, 5});
|
|
buffer.replace(2_line, buffer.end_coord(), "youpi");
|
|
buffer.undo();
|
|
buffer.redo();
|
|
buffer.undo();
|
|
|
|
kak_assert((int)buffer.line_count() == 4);
|
|
kak_assert(buffer[0_line] == "allo ?\n");
|
|
kak_assert(buffer[1_line] == "mais que fais la police\n");
|
|
kak_assert(buffer[2_line] == " hein ?\n");
|
|
kak_assert(buffer[3_line] == " youpi\n");
|
|
}};
|
|
|
|
}
|