phaser-key-actions.js

'use strict';

var findFirstWithKey = function(bindings, key) {
    for (var i = 0; i < bindings.length; i++) {
        var val = bindings[i][key];
        if (val) {
            return val;
        }
    }
    return false;
};

var findFirst = function(bindings, func) {
    for (var i = 0; i < bindings.length; i++) {
        var val = bindings[i];
        if (func(val)) {
            return val;
        }
    }
    return false;
};

var makeMultiBinding = function(input, bindings) {

    bindings = bindings.map(function(binding) {
        return input.keyboard.addKey(binding);
    });

    var out = {
        upDuration: function(duration) {
            return findFirst(bindings, function(key) {
                return key.upDuration(duration);
            });
        },
        downDuration: function(duration) {
            return findFirst(bindings, function(key) {
                return key.downDuration(duration);
            });
        }
    };

    Object.defineProperties(out, {

        isUp: {
            get: function() {
                return !!findFirstWithKey(bindings, 'isUp')
            }
        },

        isDown: {
            get: function() {
                return !!findFirstWithKey(bindings, 'isDown')
            }
        },

        duration: {
            get: function() {
                return findFirstWithKey(bindings, 'isDown').duration;
            }
        },

        repeats: {
            get: function() {
                return findFirstWithKey(bindings, 'isDown').repeats;
            }
        },

        timeDown: {
            get: function() {
                return findFirstWithKey(bindings, 'isDown').timeDown;
            }
        },

        timeUp: {
            get: function() {
                return findFirstWithKey(bindings, 'isUp').timeUp;
            }
        },
    });

    return out;
};

var bindInputKeys = function(input, keys) {
    _.each(keys, function(bindings, key) {
        keys[key] = makeMultiBinding(input, bindings);
    });

    return keys;
};

var k = Phaser.KeyCode;

var keys = {
    jump:  [k.SPACEBAR, k.W],
    up:    [k.UP, k.W],
    left:  [k.LEFT, k.A],
    right: [k.RIGHT, k.D],
    down:  [k.DOWN, k.S],

};

var actions   = bindInputKeys(game.input, keys);

if(actions.jump.isDown){
    // jump
}