136 lines
3.5 KiB
C++
136 lines
3.5 KiB
C++
/*
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* Mr. 4th Dimention - Allen Webster
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*
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* 19.08.2015
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*
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* Command management functions for 4coder
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*
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*/
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// TOP
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typedef void (*Command_Function)(struct Command_Data *command, struct Command_Binding binding);
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struct Command_Binding{
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Command_Function function;
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Custom_Command_Function *custom;
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i64 hash;
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};
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struct Command_Map{
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Command_Binding vanilla_keyboard_default;
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Command_Binding commands[101];
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i32 count, max;
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};
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internal void command_null(Command_Data *command);
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internal i64
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map_hash(u16 event_code, u8 modifiers){
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i64 result = (event_code << 4) | modifiers;
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return result;
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}
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internal bool32
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map_add(Command_Map *map, u16 event_code, u8 modifiers, Command_Function function, Custom_Command_Function *custom = 0){
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Assert(map->count * 8 < map->max * 7);
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Command_Binding bind;
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bind.function = function;
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bind.custom = custom;
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bind.hash = map_hash(event_code, modifiers);
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i32 max = map->max;
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i32 index = bind.hash % max;
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Command_Binding entry;
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while ((entry = map->commands[index]).function && entry.hash != -1){
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if (entry.hash == bind.hash){
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return 1;
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}
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index = (index + 1) % max;
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}
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map->commands[index] = bind;
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++map->count;
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return 0;
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}
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internal bool32
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map_find_entry(Command_Map *map, u16 event_code, u8 modifiers, i32 *index_out){
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i64 hash = map_hash(event_code, modifiers);
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i32 max = map->max;
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i32 index = hash % map->max;
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Command_Binding entry;
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while ((entry = map->commands[index]).function){
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if (entry.hash == hash){
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*index_out = index;
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return 1;
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}
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index = (index + 1) % max;
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}
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return 0;
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}
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internal bool32
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map_find(Command_Map *map, u16 event_code, u8 modifiers, Command_Binding *bind_out){
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bool32 result;
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i32 index;
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result = map_find_entry(map, event_code, modifiers, &index);
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if (result){
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*bind_out = map->commands[index];
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}
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return result;
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}
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internal bool32
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map_drop(Command_Map *map, u16 event_code, u8 modifiers){
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bool32 result;
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i32 index;
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result = map_find_entry(map, event_code, modifiers, &index);
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if (result){
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map->commands[index].function = 0;
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map->commands[index].hash = -1;
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}
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return result;
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}
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internal void
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map_init(Command_Map *commands){
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commands->vanilla_keyboard_default = {};
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memset(commands->commands, 0, sizeof(commands->commands));
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commands->max = ArrayCount(commands->commands);
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commands->count = 0;
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}
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internal void
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map_get_vanilla_keyboard_default(Command_Map *map, u8 command, Command_Binding *bind_out){
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if (command == MDFR_NONE){
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*bind_out = map->vanilla_keyboard_default;
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}
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}
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internal Command_Binding
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map_extract(Command_Map *map, Key_Single key){
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Command_Binding bind = {};
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u8 command = MDFR_NONE;
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bool32 ctrl = key.modifiers[CONTROL_KEY_CONTROL];
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bool32 alt = key.modifiers[CONTROL_KEY_ALT];
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bool32 shift = key.modifiers[CONTROL_KEY_SHIFT] && key.key.loose_keycode;
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if (shift) command |= MDFR_SHIFT;
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if (ctrl) command |= MDFR_CTRL;
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if (alt) command |= MDFR_ALT;
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u16 code = key.key.character_no_caps_lock;
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if (code == 0) code = key.key.keycode;
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map_find(map, code, command, &bind);
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if (bind.function == 0 && key.key.character_no_caps_lock != 0){
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map_get_vanilla_keyboard_default(map, command, &bind);
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}
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return bind;
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}
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// BOTTOM
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