47 lines
1.8 KiB
JavaScript
47 lines
1.8 KiB
JavaScript
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/* input.js — keyboard state. WASD / arrow keys drive; held A/D feeds the
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* steering smoothing in physics.js. R / N / [1-4] are edge-triggered actions. */
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(function (TOW) {
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'use strict';
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function Input() {
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this.up = false; this.down = false; this.left = false; this.right = false;
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this.actions = []; // queue of one-shot actions: 'reset','next','prev','map:N'
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var self = this;
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function set(code, val, e) {
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switch (code) {
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case 'KeyW': case 'ArrowUp': self.up = val; e.preventDefault(); break;
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case 'KeyS': case 'ArrowDown': self.down = val; e.preventDefault(); break;
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case 'KeyA': case 'ArrowLeft': self.left = val; e.preventDefault(); break;
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case 'KeyD': case 'ArrowRight': self.right = val; e.preventDefault(); break;
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}
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}
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window.addEventListener('keydown', function (e) {
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if (e.repeat) { set(e.code, true, e); return; }
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set(e.code, true, e);
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switch (e.code) {
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case 'KeyR': self.actions.push('reset'); break;
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case 'KeyN': self.actions.push('next'); break;
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case 'KeyP': self.actions.push('prev'); break;
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case 'Digit1': self.actions.push('map:0'); break;
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case 'Digit2': self.actions.push('map:1'); break;
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case 'Digit3': self.actions.push('map:2'); break;
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case 'Digit4': self.actions.push('map:3'); break;
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case 'Digit5': self.actions.push('map:4'); break;
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}
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});
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window.addEventListener('keyup', function (e) { set(e.code, false, e); });
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// releasing focus shouldn't leave a key "stuck" down
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window.addEventListener('blur', function () {
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self.up = self.down = self.left = self.right = false;
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});
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}
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Input.prototype.drainActions = function () {
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var a = this.actions; this.actions = []; return a;
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};
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TOW.Input = Input;
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})(window.TOW = window.TOW || {});
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