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src/ncurses_ui: move the parse_mask() helper outside parse_csi().

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It's useful for parsing modifier masks in all kinds of sequences, not just CSI
sequences. Also, since the modifier mask always has "1" as "no modifiers",
do the subtraction inside parse_mask() instead of when calling it.
This commit is contained in:
Tim Allen 2021-03-26 15:17:41 +11:00
parent c507863a00
commit f7c1702965
1 changed files with 14 additions and 13 deletions
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27
src/ncurses_ui.cc
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@ -657,7 +657,19 @@ Optional<Key> NCursesUI::get_next_key()
return Key{utf8::codepoint(CharIterator{c}, Sentinel{})};
};
auto parse_csi = [this, &convert]() -> Optional<Key> {
auto parse_mask = [](int mask) {
mask = std::max(mask - 1, 0);
Key::Modifiers mod = Key::Modifiers::None;
if (mask & 1)
mod |= Key::Modifiers::Shift;
if (mask & 2)
mod |= Key::Modifiers::Alt;
if (mask & 4)
mod |= Key::Modifiers::Control;
return mod;
};
auto parse_csi = [this, &convert, &parse_mask]() -> Optional<Key> {
auto next_char = [] { return get_char().value_or((unsigned char)0xff); };
int params[16] = {};
auto c = next_char();
@ -679,17 +691,6 @@ Optional<Key> NCursesUI::get_next_key()
if (c != '$' and (c < 0x40 or c > 0x7e))
return {};
auto parse_mask = [](int mask) {
Key::Modifiers mod = Key::Modifiers::None;
if (mask & 1)
mod |= Key::Modifiers::Shift;
if (mask & 2)
mod |= Key::Modifiers::Alt;
if (mask & 4)
mod |= Key::Modifiers::Control;
return mod;
};
auto mouse_button = [this](Key::Modifiers mod, Key::MouseButton button, Codepoint coord, bool release) {
auto mask = 1 << (int)button;
if (not release)
@ -710,7 +711,7 @@ Optional<Key> NCursesUI::get_next_key()
(Codepoint)((down ? 1 : -1) * m_wheel_scroll_amount)};
};
auto masked_key = [&](Codepoint key) { return Key{parse_mask(std::max(params[1] - 1, 0)), key}; };
auto masked_key = [&](Codepoint key) { return Key{parse_mask(params[1]), key}; };
switch (c)
{