mirror of
https://github.com/Relintai/pandemonium_engine.git
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145 lines
3.8 KiB
C++
145 lines
3.8 KiB
C++
// keyboard_x11.cpp
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/*
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* FRT - A Godot platform targeting single board computers
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* Copyright (c) 2017-2019 Emanuele Fornara
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifdef FRT_TEST
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#define FRT_MOCK_GODOT_INPUT_MODIFIER_STATE
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#else
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#include "core/version.h"
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#define FRT_MOCK_GODOT_INPUT_MODIFIER_STATE
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#include "core/input/input_event.h"
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#endif
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#include "frt.h"
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#include "bits/x11.h"
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#include "import/gdkeys.h"
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#ifndef FRT_MOCK_KEY_MAPPING_X11
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#include "import/key_mapping_x11.h"
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#endif
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namespace frt {
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static const long handled_mask = KeyPressMask | KeyReleaseMask;
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static const int handled_types[] = {
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KeyPress,
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KeyRelease,
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0,
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};
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class KeyboardX11 : public Keyboard, public EventHandler {
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private:
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X11User *x11;
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Display *display;
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Handler *h;
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InputModifierState st;
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public:
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KeyboardX11()
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: x11(0), h(0) {
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st.shift = false;
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st.alt = false;
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st.control = false;
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st.meta = false;
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}
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// Module
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const char *get_id() const { return "keyboard_x11"; }
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bool probe() {
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if (!x11) {
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x11 = X11Context::acquire(handled_mask, handled_types, this);
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display = x11->get_display();
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}
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return true;
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}
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void cleanup() {
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if (x11) {
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x11->release();
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x11 = 0;
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}
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}
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// Keyboard
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void set_handler(Handler *handler) {
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h = handler;
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}
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void get_modifier_state(InputModifierState &state) const { state = st; }
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// EventHandler
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void handle_event() {
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// modelled after platform/x11/os_x11.cpp, see there for rationale
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XEvent ev;
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x11->get_event(ev);
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st.shift = ev.xkey.state & ShiftMask;
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st.alt = ev.xkey.state & Mod1Mask;
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st.control = ev.xkey.state & ControlMask;
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st.meta = ev.xkey.state & Mod4Mask;
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KeySym keysym_keycode = 0;
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char str[256 + 1];
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XLookupString(&ev.xkey, str, 256, &keysym_keycode, 0);
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uint32_t unicode = 0;
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#ifndef FRT_MOCK_KEY_MAPPING_X11
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int keycode = KeyMappingX11::get_keycode(keysym_keycode);
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// just the simple case: on my system, using keysym_keycode is fine
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unicode = KeyMappingX11::get_unicode_from_keysym(keysym_keycode);
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#else
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int keycode = str[0];
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if (!keycode)
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return;
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#endif
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if (keycode >= 'a' && keycode <= 'z')
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keycode -= 'a' - 'A';
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bool pressed = ev.type == KeyPress;
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if (!pressed) { // echo?
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do {
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if (XPending(display) < 1)
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break;
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XEvent next_ev;
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XPeekEvent(display, &next_ev);
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if (next_ev.type != KeyPress)
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break;
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const int threshold = 5;
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int dt = (int)next_ev.xkey.time - (int)ev.xkey.time;
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if (dt < -threshold || dt > threshold)
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break;
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KeySym next_keysym;
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XLookupString(&next_ev.xkey, str, 256, &next_keysym, 0);
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if (next_keysym != keysym_keycode)
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break;
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XNextEvent(display, &next_ev);
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if (h)
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h->handle_keyboard_key(keycode, true, unicode, true);
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return;
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} while (false);
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}
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if (h)
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h->handle_keyboard_key(keycode, pressed, unicode, false);
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}
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};
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FRT_REGISTER(KeyboardX11)
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} // namespace frt
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