249 lines
8.2 KiB
C++
249 lines
8.2 KiB
C++
#include "keys.hh"
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#include "exception.hh"
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#include "ranges.hh"
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#include "string.hh"
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#include "unit_tests.hh"
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#include "utf8_iterator.hh"
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#include "utils.hh"
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#include "string_utils.hh"
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namespace Kakoune
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{
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struct key_parse_error : runtime_error
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{
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using runtime_error::runtime_error;
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};
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static Key canonicalize_ifn(Key key)
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{
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if (key.key > 0 and key.key < 27)
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{
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kak_assert(key.modifiers == Key::Modifiers::None);
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key.modifiers = Key::Modifiers::Control;
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key.key = key.key - 1 + 'a';
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}
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if (key.modifiers & Key::Modifiers::Shift)
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{
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if (is_basic_alpha(key.key))
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{
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// Shift + ASCII letters is just the uppercase letter.
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key.modifiers &= ~Key::Modifiers::Shift;
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key.key = to_upper(key.key);
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}
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else if (key.key < 0xD800 || key.key > 0xDFFF)
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{
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// Shift + any other printable character is not allowed.
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throw key_parse_error(format("Shift modifier only works on special keys and lowercase ASCII, not '{}'", key.key));
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}
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}
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return key;
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}
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Optional<Codepoint> Key::codepoint() const
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{
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if (*this == Key::Return)
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return '\n';
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if (*this == Key::Tab)
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return '\t';
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if (*this == Key::Escape)
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return 0x1B;
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if (modifiers == Modifiers::None and key > 27 and
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(key < 0xD800 or key > 0xDFFF)) // avoid surrogates
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return key;
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return {};
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}
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struct KeyAndName { const char* name; Codepoint key; };
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static constexpr KeyAndName keynamemap[] = {
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{ "ret", Key::Return },
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{ "space", ' ' },
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{ "tab", Key::Tab },
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{ "lt", '<' },
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{ "gt", '>' },
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{ "backspace", Key::Backspace},
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{ "esc", Key::Escape },
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{ "up", Key::Up },
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{ "down", Key::Down},
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{ "left", Key::Left },
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{ "right", Key::Right },
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{ "pageup", Key::PageUp },
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{ "pagedown", Key::PageDown },
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{ "home", Key::Home },
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{ "end", Key::End },
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{ "ins", Key::Insert },
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{ "del", Key::Delete },
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{ "plus", '+' },
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{ "minus", '-' },
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{ "semicolon", ';' },
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};
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KeyList parse_keys(StringView str)
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{
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KeyList result;
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using Utf8It = utf8::iterator<const char*>;
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for (Utf8It it{str.begin(), str}, str_end{str.end(), str}; it < str_end; ++it)
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{
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if (*it != '<')
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{
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auto convert = [](Codepoint cp) -> Codepoint {
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switch (cp)
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{
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case '\n': return Key::Return;
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case '\r': return Key::Return;
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case '\b': return Key::Backspace;
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case '\t': return Key::Tab;
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case '\033': return Key::Escape;
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default: return cp;
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}
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};
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result.emplace_back(Key::Modifiers::None, convert(*it));
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continue;
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}
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Utf8It end_it = std::find(it, str_end, '>');
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if (end_it == str_end)
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{
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result.emplace_back(Key::Modifiers::None, *it);
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continue;
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}
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Key::Modifiers modifier = Key::Modifiers::None;
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StringView full_desc{it.base(), end_it.base()+1};
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StringView desc{it.base()+1, end_it.base()};
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for (auto dash = find(desc, '-'); dash != desc.end(); dash = find(desc, '-'))
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{
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if (dash != desc.begin() + 1)
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throw key_parse_error(format("unable to parse modifier in '{}'",
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full_desc));
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switch(to_lower(desc[0_byte]))
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{
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case 'c': modifier |= Key::Modifiers::Control; break;
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case 'a': modifier |= Key::Modifiers::Alt; break;
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case 's': modifier |= Key::Modifiers::Shift; break;
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default:
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throw key_parse_error(format("unable to parse modifier in '{}'",
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full_desc));
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}
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desc = StringView{dash+1, desc.end()};
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}
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auto name_it = find_if(keynamemap, [&desc](const KeyAndName& item)
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{ return item.name == desc; });
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if (name_it != std::end(keynamemap))
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result.push_back(canonicalize_ifn({ modifier, name_it->key }));
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else if (desc.char_length() == 1)
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result.push_back(canonicalize_ifn({ modifier, desc[0_char] }));
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else if (desc[0_byte] == 'F' and desc.length() <= 3)
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{
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int val = str_to_int(desc.substr(1_byte));
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if (val >= 1 and val <= 12)
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result.emplace_back(modifier, Key::F1 + (val - 1));
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else
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throw key_parse_error(format("only F1 through F12 are supported, not '{}'", desc));
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}
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else
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throw key_parse_error("unable to parse " +
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StringView{it.base(), end_it.base()+1});
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it = end_it;
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}
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return result;
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}
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String key_to_str(Key key)
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{
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const auto coord = key.coord() + DisplayCoord{1,1};
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switch (key.modifiers)
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{
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case Key::Modifiers::MousePos:
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return format("<mouse:move:{}.{}>", coord.line, coord.column);
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case Key::Modifiers::MousePressLeft:
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return format("<mouse:press_left:{}.{}>", coord.line, coord.column);
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case Key::Modifiers::MousePressRight:
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return format("<mouse:press_right:{}.{}>", coord.line, coord.column);
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case Key::Modifiers::MouseReleaseLeft:
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return format("<mouse:release_left:{}.{}>", coord.line, coord.column);
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case Key::Modifiers::MouseReleaseRight:
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return format("<mouse:release_right:{}.{}>", coord.line, coord.column);
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case Key::Modifiers::Scroll:
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return format("<scroll:{}>", static_cast<int>(key.key));
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case Key::Modifiers::Resize:
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return format("<resize:{}.{}>", coord.line, coord.column);
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default: break;
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}
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bool named = false;
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String res;
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auto it = find_if(keynamemap, [&key](const KeyAndName& item)
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{ return item.key == key.key; });
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if (it != std::end(keynamemap))
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{
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named = true;
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res = it->name;
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}
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else if (key.key >= Key::F1 and key.key <= Key::F12)
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{
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named = true;
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res = "F" + to_string((int)(key.key - Key::F1 + 1));
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}
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else
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res = String{key.key};
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if (key.modifiers & Key::Modifiers::Shift) { res = "s-" + res; named = true; }
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if (key.modifiers & Key::Modifiers::Alt) { res = "a-" + res; named = true; }
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if (key.modifiers & Key::Modifiers::Control) { res = "c-" + res; named = true; }
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if (named)
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res = StringView{'<'} + res + StringView{'>'};
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return res;
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}
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UnitTest test_keys{[]()
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{
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KeyList keys{
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{ ' ' },
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{ 'c' },
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{ Key::Up },
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alt('j'),
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ctrl('r'),
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shift(Key::Up),
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};
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String keys_as_str;
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for (auto& key : keys)
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keys_as_str += key_to_str(key);
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auto parsed_keys = parse_keys(keys_as_str);
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kak_assert(keys == parsed_keys);
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kak_assert(ConstArrayView<Key>{parse_keys("a<c-a-b>c")} ==
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ConstArrayView<Key>{'a', ctrl(alt({'b'})), 'c'});
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kak_assert(parse_keys("x") == KeyList{ {'x'} });
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kak_assert(parse_keys("<x>") == KeyList{ {'x'} });
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kak_assert(parse_keys("<s-x>") == KeyList{ {'X'} });
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kak_assert(parse_keys("<s-X>") == KeyList{ {'X'} });
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kak_assert(parse_keys("<X>") == KeyList{ {'X'} });
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kak_assert(parse_keys("X") == KeyList{ {'X'} });
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kak_assert(parse_keys("<s-up>") == KeyList{ shift({Key::Up}) });
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kak_assert(parse_keys("<s-tab>") == KeyList{ shift({Key::Tab}) });
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kak_assert(parse_keys("\n") == KeyList{ Key::Return });
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kak_assert(key_to_str(shift({Key::Tab})) == "<s-tab>");
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kak_expect_throw(key_parse_error, parse_keys("<-x>"));
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kak_expect_throw(key_parse_error, parse_keys("<xy-z>"));
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kak_expect_throw(key_parse_error, parse_keys("<x-y>"));
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kak_expect_throw(key_parse_error, parse_keys("<s-/>"));
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kak_expect_throw(key_parse_error, parse_keys("<s-ë>"));
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kak_expect_throw(key_parse_error, parse_keys("<s-lt>"));
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kak_expect_throw(key_parse_error, parse_keys("<f99>"));
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kak_expect_throw(key_parse_error, parse_keys("<backtab>"));
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kak_expect_throw(key_parse_error, parse_keys("<invalidkey>"));
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}};
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}
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