diff options
Diffstat (limited to 'src/platform/gui/xcb/Keyboard.cpp')
| -rw-r--r-- | src/platform/gui/xcb/Keyboard.cpp | 178 |
1 files changed, 175 insertions, 3 deletions
diff --git a/src/platform/gui/xcb/Keyboard.cpp b/src/platform/gui/xcb/Keyboard.cpp index 1a69c3bd..d7559062 100644 --- a/src/platform/gui/xcb/Keyboard.cpp +++ b/src/platform/gui/xcb/Keyboard.cpp @@ -1,9 +1,181 @@ #include "cru/platform/gui/xcb/Keyboard.h" +#include "cru/platform/gui/Keyboard.h" +#include "cru/platform/gui/xcb/UiApplication.h" -#include "cru/base/Base.h" +#include <xcb/xcb.h> +#include <bitset> +#include <climits> +#include <unordered_map> +#include <utility> namespace cru::platform::gui::xcb { -KeyModifier GetCurrentKeyModifiers(XcbUiApplication* application) { - NotImplemented(); +// Refer to +// https://www.x.org/releases/X11R7.7/doc/xproto/x11protocol.html#keysym_encoding +KeyCode XorgKeysymToKeyCode(xcb_keysym_t keysym) { + if (keysym >= 'A' && keysym <= 'Z') { + return KeyCode(static_cast<int>(KeyCode::A) + (keysym - 'A')); + } + + if (keysym >= 'a' && keysym <= 'z') { + return KeyCode(static_cast<int>(KeyCode::A) + (keysym - 'a')); + } + + if (keysym >= '0' && keysym <= '9') { + return KeyCode(static_cast<int>(KeyCode::N0) + (keysym - '0')); + } + + if (keysym >= 0xFFB0 && keysym <= 0xFFB9) { + return KeyCode(static_cast<int>(KeyCode::NumPad0) + (keysym - 0xFFB0)); + } + + if (keysym >= 0xFFBE && keysym <= 0xFFC9) { + return KeyCode(static_cast<int>(KeyCode::F1) + (keysym - 0xFFBE)); + } + + switch (keysym) { +#define CRU_DEFINE_KEYCODE_MAP(keysym, cru) \ + case keysym: \ + return cru; + + CRU_DEFINE_KEYCODE_MAP(',', KeyCode::Comma) + CRU_DEFINE_KEYCODE_MAP('.', KeyCode::Period) + CRU_DEFINE_KEYCODE_MAP('/', KeyCode::Slash) + CRU_DEFINE_KEYCODE_MAP(';', KeyCode::Semicolon) + CRU_DEFINE_KEYCODE_MAP('\'', KeyCode::Quote) + CRU_DEFINE_KEYCODE_MAP('{', KeyCode::LeftSquareBracket) + CRU_DEFINE_KEYCODE_MAP('}', KeyCode::RightSquareBracket) + CRU_DEFINE_KEYCODE_MAP('-', KeyCode::Minus) + CRU_DEFINE_KEYCODE_MAP('=', KeyCode::Equal) + CRU_DEFINE_KEYCODE_MAP('\\', KeyCode::BackSlash) + CRU_DEFINE_KEYCODE_MAP(0xFF1B, KeyCode::Escape) + CRU_DEFINE_KEYCODE_MAP(0xFF09, KeyCode::Tab) + CRU_DEFINE_KEYCODE_MAP(0xFFE5, KeyCode::CapsLock) + CRU_DEFINE_KEYCODE_MAP(0xFFE1, KeyCode::LeftShift) + CRU_DEFINE_KEYCODE_MAP(0xFFE2, KeyCode::RightShift) + CRU_DEFINE_KEYCODE_MAP(0xFFE3, KeyCode::LeftCtrl) + CRU_DEFINE_KEYCODE_MAP(0xFFE4, KeyCode::RightCtrl) + CRU_DEFINE_KEYCODE_MAP(0xFFE9, KeyCode::LeftAlt) + CRU_DEFINE_KEYCODE_MAP(0xFFEA, KeyCode::RightAlt) + CRU_DEFINE_KEYCODE_MAP(0xFF08, KeyCode::Backspace) + CRU_DEFINE_KEYCODE_MAP(0xFF0D, KeyCode::Return) + CRU_DEFINE_KEYCODE_MAP(0xFFFF, KeyCode::Delete) + CRU_DEFINE_KEYCODE_MAP(0xFF50, KeyCode::Home) + CRU_DEFINE_KEYCODE_MAP(0xFF57, KeyCode::End) + CRU_DEFINE_KEYCODE_MAP(0xFF55, KeyCode::PageUp) + CRU_DEFINE_KEYCODE_MAP(0xFF56, KeyCode::PageDown) + CRU_DEFINE_KEYCODE_MAP(0xFF51, KeyCode::Left) + CRU_DEFINE_KEYCODE_MAP(0xFF53, KeyCode::Right) + CRU_DEFINE_KEYCODE_MAP(0xFF52, KeyCode::Up) + CRU_DEFINE_KEYCODE_MAP(0xFF54, KeyCode::Down) + CRU_DEFINE_KEYCODE_MAP(' ', KeyCode::Space) + default: + return KeyCode::Unknown; + } +} + +KeyCode XorgKeycodeToCruKeyCode(XcbUiApplication *application, + xcb_keycode_t keycode) { + auto connection = application->GetXcbConnection(); + auto setup = xcb_get_setup(connection); + auto min_keycode = setup->min_keycode; + auto max_keycode = setup->max_keycode; + + // Get keyboard mapping + auto mapping_cookie = xcb_get_keyboard_mapping(connection, keycode, 1); + auto *mapping_reply = + xcb_get_keyboard_mapping_reply(connection, mapping_cookie, NULL); + + if (!mapping_reply) { + throw XcbException("Cannot get keyboard mapping."); + } + + auto keysyms_per_keycode = mapping_reply->keysyms_per_keycode; + auto *keysyms = xcb_get_keyboard_mapping_keysyms(mapping_reply); + + for (int i = 0; i < keysyms_per_keycode; i++) { + auto result = XorgKeysymToKeyCode(keysyms[i]); + if (result != KeyCode::Unknown) return result; + } + + return KeyCode::Unknown; +} + +namespace { +using KeymapBitset = + std::bitset<sizeof(std::declval<xcb_query_keymap_reply_t>().keys) * + CHAR_BIT>; + +KeymapBitset GetXorgKeymap(xcb_connection_t *connection) { + auto keymap_cookie = xcb_query_keymap(connection); + auto keymap_reply = xcb_query_keymap_reply(connection, keymap_cookie, NULL); + + if (!keymap_reply) { + throw XcbException("Cannot get keymap."); + } + + KeymapBitset result; + int counter = 0; + for (auto member : keymap_reply->keys) { + for (int i = 0; i < sizeof(member); i++) { + result[counter] = member & (1 << i); + counter++; + } + } + + return result; +} +} // namespace + +std::unordered_map<KeyCode, bool> GetKeyboardState( + XcbUiApplication *application) { + auto connection = application->GetXcbConnection(); + auto setup = xcb_get_setup(connection); + auto min_keycode = setup->min_keycode; + auto max_keycode = setup->max_keycode; + + // Get keyboard mapping + auto mapping_cookie = xcb_get_keyboard_mapping(connection, min_keycode, + max_keycode - min_keycode + 1); + auto *mapping_reply = + xcb_get_keyboard_mapping_reply(connection, mapping_cookie, NULL); + + if (!mapping_reply) { + throw XcbException("Cannot get keyboard mapping."); + } + + auto keysyms_per_keycode = mapping_reply->keysyms_per_keycode; + auto *keysyms = xcb_get_keyboard_mapping_keysyms(mapping_reply); + + auto keymap = GetXorgKeymap(connection); + + std::unordered_map<KeyCode, bool> result; + + for (xcb_keycode_t i = min_keycode; i <= max_keycode; i++) { + auto keysyms_for_this = keysyms + (i - min_keycode) * keysyms_per_keycode; + for (int j = 0; j < keysyms_per_keycode; j++) { + auto keycode = XorgKeysymToKeyCode(keysyms_for_this[j]); + if (keycode != KeyCode::Unknown) { + result[keycode] = keymap[i]; + } + } + } + + return result; +} + +// Though X provides GetModifierMapping, it cannot get ALT state. +KeyModifier GetCurrentKeyModifiers(XcbUiApplication *application) { + KeyModifier result{}; + auto state = GetKeyboardState(application); + if (state[KeyCode::LeftShift] || state[KeyCode::RightShift]) { + result |= KeyModifiers::Shift; + } + if (state[KeyCode::LeftCtrl] || state[KeyCode::RightCtrl]) { + result |= KeyModifiers::Ctrl; + } + if (state[KeyCode::LeftAlt] || state[KeyCode::RightAlt]) { + result |= KeyModifiers::Alt; + } + return result; } } // namespace cru::platform::gui::xcb |