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Add support for <c-w> <c-b> and <c-e> for word moves in the line editor

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This might go away later if we find a better way of handling line
edition, but seems like a good compromise for now.

Fixes #168
This commit is contained in:
Maxime Coste 2014-08-14 00:31:39 +01:00
parent 518b995720
commit fbbe741c07
1 changed files with 85 additions and 2 deletions
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87
src/input_handler.cc
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@ -143,17 +143,87 @@ private:
Timer m_fs_check_timer;
};
template<WordType word_type>
void to_next_word_begin(CharCount& pos, StringView line)
{
const CharCount len = line.char_length();
if (pos == len)
return;
if (word_type == Word and is_punctuation(line[pos]))
{
while (pos != len and is_punctuation(line[pos]))
++pos;
}
else if (is_word<word_type>(line[pos]))
{
while (pos != len and is_word<word_type>(line[pos]))
++pos;
}
while (pos != len and is_blank(line[pos]))
++pos;
}
template<WordType word_type>
void to_next_word_end(CharCount& pos, StringView line)
{
const CharCount len = line.char_length();
if (pos + 1 >= len)
return;
++pos;
while (pos != len and is_blank(line[pos]))
++pos;
if (word_type == Word and is_punctuation(line[pos]))
{
while (pos != len and is_punctuation(line[pos]))
++pos;
}
else if (is_word<word_type>(line[pos]))
{
while (pos != len and is_word<word_type>(line[pos]))
++pos;
}
--pos;
}
template<WordType word_type>
void to_prev_word_begin(CharCount& pos, StringView line)
{
if (pos == 0_char)
return;
--pos;
while (pos != 0_char and is_blank(line[pos]))
--pos;
if (word_type == Word and is_punctuation(line[pos]))
{
while (pos != 0_char and is_punctuation(line[pos]))
--pos;
if (!is_punctuation(line[pos]))
++pos;
}
else if (is_word<word_type>(line[pos]))
{
while (pos != 0_char and is_word<word_type>(line[pos]))
--pos;
if (!is_word<word_type>(line[pos]))
++pos;
}
}
class LineEditor
{
public:
void handle_key(Key key)
{
if (key == Key::Left or key == ctrl('b'))
if (key == Key::Left)
{
if (m_cursor_pos > 0)
--m_cursor_pos;
}
else if (key == Key::Right or key == ctrl('f'))
else if (key == Key::Right)
{
if (m_cursor_pos < m_line.char_length())
++m_cursor_pos;
@ -178,6 +248,18 @@ public:
m_line = m_line.substr(0, m_cursor_pos)
+ m_line.substr(m_cursor_pos+1);
}
else if (key == ctrl('w'))
to_next_word_begin<Word>(m_cursor_pos, m_line);
else if (key == ctrlalt('w'))
to_next_word_begin<WORD>(m_cursor_pos, m_line);
else if (key == ctrl('b'))
to_prev_word_begin<Word>(m_cursor_pos, m_line);
else if (key == ctrlalt('b'))
to_prev_word_begin<WORD>(m_cursor_pos, m_line);
else if (key == ctrl('e'))
to_next_word_end<Word>(m_cursor_pos, m_line);
else if (key == ctrlalt('e'))
to_next_word_end<WORD>(m_cursor_pos, m_line);
else
{
m_line = m_line.substr(0, m_cursor_pos) + codepoint_to_str(key.key)
@ -227,6 +309,7 @@ public:
private:
CharCount m_cursor_pos = 0;
CharCount m_display_pos = 0;
String m_line;
};