93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
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/*
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* Mr. 4th Dimention - Allen Webster
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*
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* 14.11.2015
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*
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* Linux-US Keyboard layer for 4coder
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*
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*/
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// TOP
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#include "4ed_keyboard.cpp"
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internal void
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keycode_init(Display* dpy){
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#if 0
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// NOTE(inso): these are for XInput, currently not used.
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keycode_lookup_table[KEY_BACKSPACE] = codes->back;
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keycode_lookup_table[KEY_DELETE] = codes->del;
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keycode_lookup_table[KEY_UP] = codes->up;
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keycode_lookup_table[KEY_DOWN] = codes->down;
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keycode_lookup_table[KEY_LEFT] = codes->left;
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keycode_lookup_table[KEY_RIGHT] = codes->right;
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keycode_lookup_table[KEY_INSERT] = codes->insert;
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keycode_lookup_table[KEY_HOME] = codes->home;
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keycode_lookup_table[KEY_END] = codes->end;
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keycode_lookup_table[KEY_PAGEUP] = codes->page_up;
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keycode_lookup_table[KEY_PAGEDOWN] = codes->page_down;
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keycode_lookup_table[KEY_ESC] = codes->esc;
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#endif
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// NOTE(inso): This looks a bit dumb, but it's the best way I can think of to do it, since:
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// KeySyms are the type representing "virtual" keys, like XK_BackSpace, but they are 32-bit ints.
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// KeyCodes are guaranteed to fit in 1 byte (and therefore the keycode_lookup_table) but
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// have dynamic numbers assigned by the XServer.
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// There is XKeysymToKeycode, but it only returns 1 KeyCode for a KeySym. I have my capslock
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// rebound to esc, so there are two KeyCodes for the XK_Escape KeyCode but XKeysymToKeycode only
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// gets one of them, hence the need for this crazy lookup which works correctly with rebound keys.
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memset(keycode_lookup_table, 0, sizeof(keycode_lookup_table));
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struct SymMapping {
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KeySym sym;
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Code code;
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} sym_table[] = {
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{ XK_BackSpace, key_back },
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{ XK_Delete, key_del },
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{ XK_Up, key_up },
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{ XK_Down, key_down },
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{ XK_Left, key_left },
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{ XK_Right, key_right },
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{ XK_Insert, key_insert },
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{ XK_Home, key_home },
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{ XK_End, key_end },
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{ XK_Page_Up, key_page_up },
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{ XK_Page_Down, key_page_down },
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{ XK_Escape, key_esc }
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};
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const int table_size = sizeof(sym_table) / sizeof(struct SymMapping);
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int key_min, key_max, syms_per_code;
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XDisplayKeycodes(dpy, &key_min, &key_max);
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int key_count = (key_max - key_min) + 1;
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KeySym* syms = XGetKeyboardMapping(
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dpy,
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key_min,
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key_count,
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&syms_per_code
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);
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if(!syms) return;
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int key = key_min;
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for(int i = 0; i < key_count * syms_per_code; ++i){
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for(int j = 0; j < table_size; ++j){
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if(sym_table[j].sym == syms[i]){
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keycode_lookup_table[key + (i/syms_per_code)] = sym_table[j].code;
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break;
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}
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}
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}
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XFree(syms);
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}
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// BOTTOM
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