130 lines
3.6 KiB
C++
130 lines
3.6 KiB
C++
#include "keys.hh"
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#include "utils.hh"
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#include "utf8_iterator.hh"
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namespace Kakoune
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{
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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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return key;
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}
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using KeyAndName = std::pair<const char*, Codepoint>;
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static const KeyAndName keynamemap[] = {
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{ "ret", '\r' },
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{ "space", ' ' },
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{ "tab", '\t' },
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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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{ "backtab", Key::BackTab },
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{ "del", Key::Delete },
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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_end = str.end(); it < str_end; ++it)
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{
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if (*it != '<')
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{
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result.push_back({Key::Modifiers::None, *it});
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continue;
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}
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Utf8It end_it = it;
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skip_while(end_it, str_end, [](char c) { return c != '>'; });
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if (end_it == str_end)
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{
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result.push_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 desc{it.base()+1, end_it.base()};
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if (desc.length() > 2 and desc[1] == '-')
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{
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switch(tolower(desc[0]))
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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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default:
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throw runtime_error("unable to parse modifier in " +
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StringView{it.base(), end_it.base()+1});
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}
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desc = desc.substr(2_byte);
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}
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auto name_it = find_if(keynamemap, [&desc](const KeyAndName& item)
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{ return item.first == desc; });
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if (name_it != end(keynamemap))
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result.push_back(canonicalize_ifn({ modifier, name_it->second }));
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else if (desc.char_length() == 1)
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result.push_back(Key{ modifier, desc[0_char] });
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else if (tolower(desc[0]) == '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.push_back(Key{ modifier, Key::F1 + (val - 1) });
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else
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throw runtime_error("Only F1 through F12 are supported");
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}
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else
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throw runtime_error("Failed 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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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.second == key.key; });
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if (it != end(keynamemap))
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{
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named = true;
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res = it->first;
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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 = codepoint_to_str(key.key);
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switch (key.modifiers)
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{
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case Key::Modifiers::Control: res = "c-" + res; named = true; break;
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case Key::Modifiers::Alt: res = "a-" + res; named = true; break;
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default: break;
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}
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if (named)
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res = '<' + res + '>';
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return res;
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}
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}
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