phaser4-rex-plugins/dist/rexstepplugin.js

Plugins of phaser4

(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
    typeof define === 'function' && define.amd ? define(factory) :
    (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.rexstepplugin = factory());
})(this, (function () { 'use strict';

    var EventEmitterMethods = {
        setEventEmitter(eventEmitter, EventEmitterClass) {
            if (EventEmitterClass === undefined) {
                EventEmitterClass = Phaser.Events.EventEmitter; // Use built-in EventEmitter class by default
            }
            this._privateEE = (eventEmitter === true) || (eventEmitter === undefined);
            this._eventEmitter = (this._privateEE) ? (new EventEmitterClass()) : eventEmitter;
            return this;
        },

        destroyEventEmitter() {
            if (this._eventEmitter && this._privateEE) {
                this._eventEmitter.shutdown();
            }
            return this;
        },

        getEventEmitter() {
            return this._eventEmitter;
        },

        on() {
            if (this._eventEmitter) {
                this._eventEmitter.on.apply(this._eventEmitter, arguments);
            }
            return this;
        },

        once() {
            if (this._eventEmitter) {
                this._eventEmitter.once.apply(this._eventEmitter, arguments);
            }
            return this;
        },

        off() {
            if (this._eventEmitter) {
                this._eventEmitter.off.apply(this._eventEmitter, arguments);
            }
            return this;
        },

        emit(event) {
            if (this._eventEmitter && event) {
                this._eventEmitter.emit.apply(this._eventEmitter, arguments);
            }
            return this;
        },

        addListener() {
            if (this._eventEmitter) {
                this._eventEmitter.addListener.apply(this._eventEmitter, arguments);
            }
            return this;
        },

        removeListener() {
            if (this._eventEmitter) {
                this._eventEmitter.removeListener.apply(this._eventEmitter, arguments);
            }
            return this;
        },

        removeAllListeners() {
            if (this._eventEmitter) {
                this._eventEmitter.removeAllListeners.apply(this._eventEmitter, arguments);
            }
            return this;
        },

        listenerCount() {
            if (this._eventEmitter) {
                return this._eventEmitter.listenerCount.apply(this._eventEmitter, arguments);
            }
            return 0;
        },

        listeners() {
            if (this._eventEmitter) {
                return this._eventEmitter.listeners.apply(this._eventEmitter, arguments);
            }
            return [];
        },

        eventNames() {
            if (this._eventEmitter) {
                return this._eventEmitter.eventNames.apply(this._eventEmitter, arguments);
            }
            return [];
        },
    };

    const SceneClass = Phaser.Scene;
    var IsSceneObject = function (object) {
        return (object instanceof SceneClass);
    };

    var GetSceneObject = function (object) {
        if ((object == null) || (typeof (object) !== 'object')) {
            return null;
        } else if (IsSceneObject(object)) { // object = scene
            return object;
        } else if (object.scene && IsSceneObject(object.scene)) { // object = game object
            return object.scene;
        } else if (object.parent && object.parent.scene && IsSceneObject(object.parent.scene)) { // parent = bob object
            return object.parent.scene;
        } else {
            return null;
        }
    };

    const GameClass = Phaser.Game;
    var IsGame = function (object) {
        return (object instanceof GameClass);
    };

    var GetGame = function (object) {
        if ((object == null) || (typeof (object) !== 'object')) {
            return null;
        } else if (IsGame(object)) {
            return object;
        } else if (IsGame(object.game)) {
            return object.game;
        } else if (IsSceneObject(object)) { // object = scene object
            return object.sys.game;
        } else if (IsSceneObject(object.scene)) { // object = game object
            return object.scene.sys.game;
        }
    };

    const GetValue$3 = Phaser.Utils.Objects.GetValue;

    class ComponentBase {
        constructor(parent, config) {
            this.setParent(parent);  // gameObject, scene, or game

            this.isShutdown = false;

            // Event emitter, default is private event emitter
            this.setEventEmitter(GetValue$3(config, 'eventEmitter', true));

            // Register callback of parent destroy event, also see `shutdown` method
            if (this.parent) {
                if (this.parent === this.scene) { // parent is a scene
                    this.scene.sys.events.once('shutdown', this.onEnvDestroy, this);

                } else if (this.parent === this.game) { // parent is game
                    this.game.events.once('shutdown', this.onEnvDestroy, this);

                } else if (this.parent.once) { // parent is game object or something else
                    this.parent.once('destroy', this.onParentDestroy, this);
                }

                // bob object does not have event emitter
            }

        }

        shutdown(fromScene) {
            // Already shutdown
            if (this.isShutdown) {
                return;
            }

            // parent might not be shutdown yet
            if (this.parent) {
                if (this.parent === this.scene) { // parent is a scene
                    this.scene.sys.events.off('shutdown', this.onEnvDestroy, this);

                } else if (this.parent === this.game) { // parent is game
                    this.game.events.off('shutdown', this.onEnvDestroy, this);

                } else if (this.parent.once) { // parent is game object or something else
                    this.parent.off('destroy', this.onParentDestroy, this);
                }

                // bob object does not have event emitter
            }


            this.destroyEventEmitter();

            this.parent = undefined;
            this.scene = undefined;
            this.game = undefined;

            this.isShutdown = true;
        }

        destroy(fromScene) {
            this.shutdown(fromScene);
        }

        onEnvDestroy() {
            this.destroy(true);
        }

        onParentDestroy(parent, fromScene) {
            this.destroy(fromScene);
        }

        setParent(parent) {
            this.parent = parent;  // gameObject, scene, or game

            this.scene = GetSceneObject(parent);
            this.game = GetGame(parent);

            return this;
        }

    }
    Object.assign(
        ComponentBase.prototype,
        EventEmitterMethods
    );

    const GetValue$2 = Phaser.Utils.Objects.GetValue;

    class TickTask extends ComponentBase {
        constructor(parent, config) {
            super(parent, config);

            this._isRunning = false;
            this.isPaused = false;
            this.tickingState = false;
            this.setTickingMode(GetValue$2(config, 'tickingMode', 1));
            // boot() later
        }

        // override
        boot() {
            if ((this.tickingMode === 2) && (!this.tickingState)) {
                this.startTicking();
            }
        }

        // override
        shutdown(fromScene) {
            // Already shutdown
            if (this.isShutdown) {
                return;
            }

            this.stop();
            if (this.tickingState) {
                this.stopTicking();
            }
            super.shutdown(fromScene);
        }

        setTickingMode(mode) {
            if (typeof (mode) === 'string') {
                mode = TICKINGMODE[mode];
            }
            this.tickingMode = mode;
        }

        // override
        startTicking() {
            this.tickingState = true;
        }

        // override
        stopTicking() {
            this.tickingState = false;
        }

        get isRunning() {
            return this._isRunning;
        }

        set isRunning(value) {
            if (this._isRunning === value) {
                return;
            }

            this._isRunning = value;
            if ((this.tickingMode === 1) && (value != this.tickingState)) {
                if (value) {
                    this.startTicking();
                } else {
                    this.stopTicking();
                }
            }
        }

        start() {
            this.isPaused = false;
            this.isRunning = true;
            return this;
        }

        pause() {
            // Only can ba paused in running state
            if (this.isRunning) {
                this.isPaused = true;
                this.isRunning = false;
            }
            return this;
        }

        resume() {
            // Only can ba resumed in paused state (paused from running state)
            if (this.isPaused) {
                this.isPaused = false;
                this.isRunning = true;
            }
            return this;
        }

        stop() {
            this.isPaused = false;
            this.isRunning = false;
            return this;
        }

        complete() {
            this.isPaused = false;
            this.isRunning = false;
            this.emit('complete', this.parent, this);
        }
    }

    const TICKINGMODE = {
        'no': 0,
        'lazy': 1,
        'always': 2
    };

    const GetValue$1 = Phaser.Utils.Objects.GetValue;

    class SceneUpdateTickTask extends TickTask {
        constructor(parent, config) {
            super(parent, config);

            // scene update : update, preupdate, postupdate, prerender, render
            // game update : step, poststep, 

            // If this.scene is not available, use game's 'step' event
            var defaultEventName = (this.scene) ? 'update' : 'step';
            this.tickEventName = GetValue$1(config, 'tickEventName', defaultEventName);
            this.isSceneTicker = !IsGameUpdateEvent(this.tickEventName);

        }

        startTicking() {
            super.startTicking();

            if (this.isSceneTicker) {
                this.scene.sys.events.on(this.tickEventName, this.update, this);
            } else {
                this.game.events.on(this.tickEventName, this.update, this);
            }

        }

        stopTicking() {
            super.stopTicking();

            if (this.isSceneTicker && this.scene) { // Scene might be destoryed
                this.scene.sys.events.off(this.tickEventName, this.update, this);
            } else if (this.game) {
                this.game.events.off(this.tickEventName, this.update, this);
            }
        }

        // update(time, delta) {
        //     
        // }

    }

    var IsGameUpdateEvent = function (eventName) {
        return (eventName === 'step') || (eventName === 'poststep');
    };

    const GetValue = Phaser.Utils.Objects.GetValue;

    class Step extends SceneUpdateTickTask {
        constructor(gameObject, config) {
            super(gameObject, config);
            // this.parent = gameObject;

            this.resetFromJSON(config);
            this.boot();
        }

        resetFromJSON(o) {
            this.setEnable(GetValue(o, 'enable', true));
            this.setStepLength(GetValue(o, 'stepLength', 5));
        }

        toJSON() {
            return {
                enable: this.enable,

            };
        }

        get enable() {
            return this._enable;
        }

        set enable(value) {
            value = !!value;
            if (this._enable === value) {
                return this;
            }

            this._enable = value;
            this.isRunning = value;

            if (value) {
                var gameObject = this.parent;
                this.preX = gameObject.x;
                this.preY = gameObject.y;
            }
        }

        setEnable(e) {
            if (e == undefined) {
                e = true;
            }
            this.enable = e;

            return this;
        }

        setStepLength(stepLength) {
            this.stepLength = stepLength;
            return this;
        }

        cancelStep() {
            this.cancelStepFlag = true;
            return this;
        }

        update(time, delta) {
            if (!this.enable) {
                return this;
            }

            var gameObject = this.parent;
            if (!gameObject.active) {
                return this;
            }

            var x0 = this.preX,
                y0 = this.preY,
                x1 = gameObject.x,
                y1 = gameObject.y;

            if ((x0 === x1) && (y0 === y1)) {
                return this;
            }

            this.cancelStepFlag = false;

            this.step(x0, y0, x1, y1, this.stepLength);

            this.preX = x1;
            this.preY = y1;
            return this;
        }

        step(x0, y0, x1, y1, stepLength) {
            if (this.cancelStepFlag) {
                return this;
            }

            var dx = x1 - x0,
                dy = y1 - y0;
            var d = Math.sqrt(dx * dx + dy * dy);

            var steps = Math.round(d / stepLength);
            if (steps === 0) {
                steps = 1;
            }

            var stepX = dx / steps,
                stepY = dy / steps;
            var xt, yt;
            var gameObject = this.parent;
            var points = [];
            for (var i = 1; i <= steps; i++) {
                xt = x0 + (stepX * i);
                yt = y0 + (stepY * i);
                points.push({ x: xt, y: yt });

                this.emit('step', gameObject, this, xt, yt);

                if (this.cancelStepFlag) {
                    break;
                }
            }

            this.emit('steps', gameObject, this, points);

            return this;
        }

    }

    const IsPlainObject = Phaser.Utils.Objects.IsPlainObject;

    var StepMethods = {
        onInitStep() {
            var step = this._step;
            // Route 'step' of step to gameObject       
            step.on('step', function (gameObject, step, stepX, stepY) {
                gameObject.emit('step.step', gameObject, stepX, stepY);
            });
        },

        stepStart(stepLength) {
            if (IsPlainObject(stepLength)) {
                var config = stepLength;
                stepLength = config.stepLength;
            }
            if (stepLength === undefined) {
                stepLength = 5;
            }

            if (this._step === undefined) {
                this._step = new Step(this, {
                    stepLength: stepLength
                });
                this.onInitStep();
            } else {
                this._step
                    .setEnable()
                    .setStepLength(stepLength);
            }

            return this;
        },

        stepStop() {
            if (!this._step) {
                return this;
            }

            this._step.setEnable(false);
            return this;
        }
    };

    class StepPlugin extends Phaser.Plugins.BasePlugin {

        constructor(pluginManager) {
            super(pluginManager);
        }

        start() {
            var eventEmitter = this.game.events;
            eventEmitter.on('destroy', this.destroy, this);
        }

        add(gameObject, config) {
            return new Step(gameObject, config);
        }

        injectMethods(gameObject) {
            Object.assign(gameObject, StepMethods);
            return gameObject;
        }

        injectMethodsToRootClass() {
            this.injectMethods(Phaser.GameObjects.GameObject.prototype);
            return this;
        }
    }

    return StepPlugin;

}));