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Parse xterm-keys for motion directly

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Ideally, something better should be done (re #2554) but this is a decent
intermediate step for some useful keys.

Note: NCurses supports parsing these keys when shifted (KEY_SR,
_SLEFT, S_RIGHT, etc), but it does not do the same thing for the other
modifiers.
This commit is contained in:
Jay McCarthy 2018-11-28 16:27:18 -05:00
parent b897a18aa6
commit af5d2d9523
2 changed files with 46 additions and 3 deletions
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4
src/keys.hh
View File

@ -109,6 +109,10 @@ constexpr Key ctrl(Key key)
{
return { key.modifiers | Key::Modifiers::Control, key.key };
}
constexpr Key shift_alt(Key k) { return shift(alt(k)); }
constexpr Key shift_ctrl(Key k) { return shift(ctrl(k)); }
constexpr Key alt_ctrl(Key k) { return alt(ctrl(k)); }
constexpr Key shift_alt_ctrl(Key k) { return shift(alt(ctrl(k))); }
constexpr Codepoint encode_coord(DisplayCoord coord) { return (Codepoint)(((int)coord.line << 16) | ((int)coord.column & 0x0000FFFF)); }

45
src/ncurses_ui.cc
View File

@ -661,12 +661,51 @@ Optional<Key> NCursesUI::get_next_key()
const int new_c = wgetch(m_window);
if (new_c == '[') // potential CSI
{
const Codepoint csi_val = wgetch(m_window);
switch (csi_val)
const Codepoint c1 = wgetch(m_window);
switch (c1)
{
case 'I': return {Key::FocusIn};
case 'O': return {Key::FocusOut};
default: break; // nothing
case '1':
{
const Codepoint c2 = wgetch(m_window);
if ( c2 != ';' )
{
ungetch(c2); ungetch(c1); break;
}
const Codepoint c3 = wgetch(m_window);
Key (*f)(Key) = NULL;
switch (c3)
{
case '2': f = shift; break;
case '3': f = alt; break;
case '4': f = shift_alt; break;
case '5': f = ctrl; break;
case '6': f = shift_ctrl; break;
case '7': f = alt_ctrl; break;
case '8': f = shift_alt_ctrl; break;
}
if ( f == NULL )
{
ungetch(c3); ungetch(c2); ungetch(c1); break;
}
const Codepoint c4 = wgetch(m_window);
switch (c4)
{
case 'A': return f(Key::Up);
case 'B': return f(Key::Down);
case 'C': return f(Key::Right);
case 'D': return f(Key::Left);
case 'H': return f(Key::Home);
case 'F': return f(Key::End);
}
ungetch(c4); ungetch(c3); ungetch(c2); ungetch(c1); break;
}
default:
ungetch(c1); break;
}
}
wtimeout(m_window, -1);