Add a word completing functionality to insert mode (wip)

This commit is contained in:
Maxime Coste 2012-09-30 16:24:06 +02:00
parent 430765e132
commit 29b72b3e24

View File

@ -316,6 +316,80 @@ private:
KeyCallback m_callback;
};
class WordCompleter
{
public:
void select(const Context& context, int offset)
{
if (not setup_ifn(context))
return;
context.buffer().erase(m_position, m_position + m_completions[m_current_completion].length());
m_current_completion = (m_current_completion + offset) % m_completions.size();
context.buffer().insert(m_position, m_completions[m_current_completion]);
context.ui().menu_select(m_current_completion);
}
void reset(const Context& context)
{
m_position = BufferIterator();
context.ui().menu_hide();
}
private:
bool setup_ifn(const Context& context)
{
if (not m_position.is_valid())
{
BufferIterator end = context.editor().selections().back().last();
BufferIterator begin = end-1;
while (not begin.is_begin() and is_word(*begin))
--begin;
if (not is_word(*begin))
++begin;
String prefix = context.buffer().string(begin, end);
m_completions = complete_word(context, prefix);
if (m_completions.empty())
return false;
m_position = begin;
DisplayCoord menu_pos = context.window().display_position(m_position);
context.ui().menu_show(m_completions, menu_pos, MenuStyle::Inline);
m_completions.push_back(prefix);
m_current_completion = m_completions.size() - 1;
}
return true;
}
CandidateList complete_word(const Context& context,
const String& prefix)
{
String ex = "\\<\\Q" + prefix + "\\E\\w+\\>";
Regex re(ex.begin(), ex.end());
Buffer& buffer = context.buffer();
boost::regex_iterator<BufferIterator> it(buffer.begin(), buffer.end(), re);
boost::regex_iterator<BufferIterator> end;
CandidateList result;
while (it != end)
{
auto& match = (*it)[0];
String content = buffer.string(match.first, match.second);
if (not contains(result, content))
result.emplace_back(std::move(content));
++it;
}
std::sort(result.begin(), result.end());
return result;
}
BufferIterator m_position;
CandidateList m_completions;
int m_current_completion = -1;
};
class Insert : public ClientMode
{
public:
@ -337,12 +411,14 @@ public:
m_insert_reg = false;
return;
}
bool reset_completer = true;
switch (key.modifiers)
{
case Key::Modifiers::None:
switch (key.key)
{
case Key::Escape:
m_completer.reset(context);
reset_normal_mode();
return;
case Key::Backspace:
@ -376,13 +452,24 @@ public:
case 'i':
m_inserter.insert(String() + '\t');
break;
case 'n':
m_completer.select(context, 1);
reset_completer = false;
break;
case 'p':
m_completer.select(context, -1);
reset_completer = false;
break;
}
break;
}
if (reset_completer)
m_completer.reset(context);
}
private:
bool m_insert_reg = false;
IncrementalInserter m_inserter;
WordCompleter m_completer;
};
}