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WordDB now uses a LineChangeWatcher based implementation

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This commit is contained in:
Maxime Coste 2014-01-24 00:56:33 +00:00
parent a96b2d3cd2
commit ad818853a2
2 changed files with 70 additions and 74 deletions
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122
src/word_db.cc
View File

@ -6,15 +6,9 @@
namespace Kakoune
{
WordDB::WordDB(const Buffer& buffer)
: BufferChangeListener_AutoRegister{const_cast<Buffer&>(buffer)}
{
for (auto line = 0_line, end = buffer.line_count(); line < end; ++line)
add_words(line, buffer[line]);
}
void WordDB::add_words(LineCount line, const String& content)
static std::vector<String> get_words(const String& content)
{
std::vector<String> res;
using Iterator = utf8::utf8_iterator<String::const_iterator,
utf8::InvalidBytePolicy::Pass>;
auto word_start = content.begin();
@ -30,80 +24,86 @@ void WordDB::add_words(LineCount line, const String& content)
}
else if (in_word and not word)
{
String w{word_start, it.base()};
m_word_to_lines[w].push_back(line);
m_line_to_words[line].push_back(w);
res.push_back({word_start, it.base()});
in_word = false;
}
}
return res;
}
WordDB::LineToWords::iterator WordDB::remove_line(LineToWords::iterator it)
static void add_words(WordDB::WordList& wl, const std::vector<String>& words)
{
if (it == m_line_to_words.end())
return it;
for (auto& w : words)
++wl[w];
}
for (auto& word : it->second)
static void remove_words(WordDB::WordList& wl, const std::vector<String>& words)
{
for (auto& w : words)
{
auto wtl_it = m_word_to_lines.find(word);
auto& lines = wtl_it->second;
lines.erase(find(lines, it->first));
if (lines.empty())
m_word_to_lines.erase(wtl_it);
auto it = wl.find(w);
kak_assert(it != wl.end() and it->second > 0);
if (--it->second == 0)
wl.erase(it);
}
return m_line_to_words.erase(it);
}
void WordDB::update_lines(LineToWords::iterator begin, LineToWords::iterator end,
LineCount num)
WordDB::WordDB(const Buffer& buffer)
: m_change_watcher{buffer}
{
std::vector<std::pair<LineCount, std::vector<String>>>
to_update{std::make_move_iterator(begin), std::make_move_iterator(end)};
m_line_to_words.erase(begin, end);
for (auto& elem : to_update)
m_line_to_words.reserve((int)buffer.line_count());
for (auto line = 0_line, end = buffer.line_count(); line < end; ++line)
{
for (auto& word : elem.second)
m_line_to_words.push_back(get_words(buffer[line]));
add_words(m_words, m_line_to_words.back());
}
}
void WordDB::update_db()
{
auto modifs = m_change_watcher.compute_modifications();
if (modifs.empty())
return;
auto& buffer = m_change_watcher.registry();
LineToWords new_lines;
new_lines.reserve((int)buffer.line_count());
auto old_line = 0_line;
for (auto& modif : modifs)
{
kak_assert(0_line <= modif.new_line and modif.new_line < buffer.line_count());
kak_assert(old_line <= modif.old_line);
while (old_line < modif.old_line)
new_lines.push_back(std::move(m_line_to_words[(int)old_line++]));
kak_assert((int)new_lines.size() == (int)modif.new_line);
while (old_line <= modif.old_line + modif.num_removed)
{
auto& lines = m_word_to_lines[word];
*find(lines, elem.first) += num;
kak_assert(old_line < m_line_to_words.size());
remove_words(m_words, m_line_to_words[(int)old_line++]);
}
for (auto l = 0_line; l <= modif.num_added; ++l)
{
new_lines.push_back(get_words(buffer[modif.new_line + l]));
add_words(m_words, new_lines.back());
}
elem.first += num;
}
m_line_to_words.insert(std::make_move_iterator(to_update.begin()),
std::make_move_iterator(to_update.end()));
while (old_line != (int)m_line_to_words.size())
new_lines.push_back(std::move(m_line_to_words[(int)old_line++]));
m_line_to_words = std::move(new_lines);
}
void WordDB::on_insert(const Buffer& buffer, BufferCoord begin, BufferCoord end)
std::vector<String> WordDB::find_prefix(const String& prefix)
{
auto num = end.line - begin.line;
if (num > 0)
update_lines(m_line_to_words.upper_bound(begin.line),
m_line_to_words.end(), num);
update_db();
remove_line(m_line_to_words.find(begin.line));
for (auto line = begin.line; line <= end.line; ++line)
add_words(line, buffer[line]);
}
void WordDB::on_erase(const Buffer& buffer, BufferCoord begin, BufferCoord end)
{
auto first = m_line_to_words.lower_bound(begin.line);
auto last = m_line_to_words.upper_bound(end.line);
while (first != last)
first = remove_line(first);
auto num = end.line - begin.line;
if (num > 0)
update_lines(last, m_line_to_words.end(), -num);
add_words(begin.line, buffer[begin.line]);
}
std::vector<String> WordDB::find_prefix(const String& prefix) const
{
std::vector<String> res;
for (auto it = m_word_to_lines.lower_bound(prefix); it != m_word_to_lines.end(); ++it)
for (auto it = m_words.lower_bound(prefix); it != m_words.end(); ++it)
{
if (not prefix_match(it->first, prefix))
break;

22
src/word_db.hh
View File

@ -2,8 +2,9 @@
#define word_db_hh_INCLUDED
#include "buffer.hh"
#include "line_change_watcher.hh"
#include <set>
#include <map>
namespace Kakoune
{
@ -11,26 +12,21 @@ namespace Kakoune
class String;
// maintain a database of words available in a buffer
class WordDB : public BufferChangeListener_AutoRegister
class WordDB
{
public:
WordDB(const Buffer& buffer);
void on_insert(const Buffer& buffer, BufferCoord begin, BufferCoord end) override;
void on_erase(const Buffer& buffer, BufferCoord begin, BufferCoord end) override;
std::vector<String> find_prefix(const String& prefix) const;
std::vector<String> find_prefix(const String& prefix);
using WordList = std::map<String, int>;
private:
using WordToLines = std::map<String, std::vector<LineCount>>;
using LineToWords = std::map<LineCount, std::vector<String>>;
using LineToWords = std::vector<std::vector<String>>;
void add_words(LineCount line, const String& content);
LineToWords::iterator remove_line(LineToWords::iterator it);
void update_lines(LineToWords::iterator begin, LineToWords::iterator end,
LineCount num);
void update_db();
WordToLines m_word_to_lines;
LineChangeWatcher m_change_watcher;
WordList m_words;
LineToWords m_line_to_words;
};