var warn = require("./tools/tools").warn;
var commands = require("./commands");
var functions = require("./functions");

function Trigger (trigger, interpreter) {

    var self = this, fn;

    this.name = trigger.getAttribute("name") || null;
    this.event = trigger.getAttribute("event") || null;
    this.special = trigger.getAttribute("special") || null;
    this.fnName = trigger.getAttribute("function") || null;
    this.scene = trigger.getAttribute("scene") || null;
    this.interpreter = interpreter;
    this.isSubscribed = false;

    if (this.name === null) {
        warn(interpreter.bus, "No 'name' attribute specified on 'trigger' element.", trigger);
        return;
    }

    if (this.event === null) {

        warn(interpreter.bus, "No 'event' attribute specified on 'trigger' element '" +
            this.name + "'.", trigger);

        return;
    }

    if (this.special === null && this.fnName === null && this.scene === null) {

        warn(interpreter.bus, "No suitable action or function found for trigger element '" +
            this.name + "'.", trigger);

        return;
    }

    if (this.scene) {

        fn = function () {
            commands.sub(trigger, interpreter);
            interpreter.index = 0;
            interpreter.currentElement = 0;
            interpreter.next();
        };
    }

    this.isKeyEvent = false;
    this.key = null;

    if (this.special !== null && this.special !== "next") {

        warn(interpreter.bus, "Unknown special specified on trigger element '" +
            this.name + "'.", trigger);

        return;
    }

    if (this.special === "next") {

        fn = function () {

            if (self.interpreter.state === "pause" || self.interpreter.waitCounter > 0) {
                return;
            }

            self.interpreter.next();
        };
    }

    if (this.fnName !== null) {

        if (typeof functions[this.fnName] !== "function") {

            warn(interpreter.bus, "Unknown function specified on trigger element '" +
                this.name + "'.", trigger);

            return;
        }

        fn = function () {
            functions[self.fnName](self.interpreter, trigger);
        };
    }

    switch (this.event) {

        case "keyup":
        case "keydown":
        case "keypress":

            this.isKeyEvent = true;
            this.key = trigger.getAttribute("key") || null;

            if (this.key === null) {

                warn(interpreter.bus, "No 'key' attribute specified on trigger element '" +
                    this.name + "'.", trigger);

                return;
            }

            if (
                typeof interpreter.game.keys.keys[this.key] === "undefined" ||
                interpreter.game.keys.keys[this.key] === null
            ) {

                warn(interpreter.bus, "Unknown key '" + this.key + "' specified on trigger " +
                    "element '" + this.name + "'.", trigger);

                return;
            }

            this.fn = function (data) {

                if (data.keys[self.key].kc !== data.event.keyCode) {
                    return;
                }

                if (interpreter.keysDisabled > 0) {
                    return;
                }

                fn();
            };

            return;

        default:
            this.fn = fn;
    }
}

Trigger.prototype.activate = function () {

    if (this.isSubscribed === true) {
        return;
    }

    this.interpreter.bus.subscribe(this.fn, this.event);
    this.isSubscribed = true;
};

Trigger.prototype.deactivate = function () {

    if (this.isSubscribed === false) {
        return;
    }

    this.interpreter.bus.unsubscribe(this.fn, this.event);
    this.isSubscribed = false;
};

module.exports = Trigger;

Documents

docs/reference/elements/nametemplate.md
docs/reference/elements/stop.md
docs/development.md
docs/documentation.md
docs/downloads.md
docs/examples.md
docs/games.md
docs/index.md
docs/reference/elements/alert.md
docs/reference/elements/animation.md
docs/reference/elements/assets.md
docs/reference/elements/audio.md
docs/reference/elements/background.md
docs/reference/elements/break.md
docs/reference/elements/character.md
docs/reference/elements/choice.md
docs/reference/elements/clear.md
docs/reference/elements/composite.md
docs/reference/elements/conditionals.md
docs/reference/elements/confirm.md
docs/reference/elements/curtain.md
docs/reference/elements/displayname.md
docs/reference/elements/do.md
docs/reference/elements/easing_attribute.md
docs/reference/elements/else.md
docs/reference/elements/flash.md
docs/reference/elements/flicker.md
docs/reference/elements/fn.md
docs/reference/elements/global.md
docs/reference/elements/globalize.md
docs/reference/elements/goto.md
docs/reference/elements/group.md
docs/reference/elements/hide.md
docs/reference/elements/image.md
docs/reference/elements/imagepack.md
docs/reference/elements/line.md
docs/reference/elements/localize.md
docs/reference/elements/move.md
docs/community.md
docs/reference/elements/option.md
docs/reference/elements/pause.md
docs/reference/elements/play.md
docs/reference/elements/prompt.md
docs/reference/elements/restart.md
docs/reference/elements/scene.md
docs/reference/elements/scenes.md
docs/reference/elements/set.md
docs/reference/elements/set_vars.md
docs/reference/elements/settings.md
docs/reference/elements/shake.md
docs/reference/elements/show.md
docs/reference/elements/source.md
docs/reference/elements/stage.md
docs/reference/elements/start.md
docs/beginners-guide.md
docs/reference/elements/sub.md
docs/reference/elements/tag.md
docs/reference/elements/textbox.md
docs/reference/elements/track.md
docs/reference/elements/transform.md
docs/reference/elements/trigger.md
docs/reference/elements/trigger_command.md
docs/reference/elements/triggers.md
docs/reference/elements/var.md
docs/reference/elements/wait.md
docs/reference/elements/when.md
docs/reference/elements/while.md
docs/reference/elements/with.md
docs/reference/elements/ws.md
docs/reference/elements.md
docs/reference/language.md
docs/reference/structure.md
docs/reference/syntax.md
docs/web-servers.md
libs/MO5/README.md
libs/MO5/libs/using.js/README.md
libs/MO5/js/EventBus.js
libs/MO5/js/Animation.js
libs/MO5/js/CoreObject.js
libs/MO5/js/Exception.js
libs/MO5/js/List.js
libs/MO5/js/MO5.js
libs/MO5/js/Map.js
libs/MO5/js/Point.js
libs/MO5/js/Promise.js
libs/MO5/js/Queue.js
libs/MO5/js/Result.js
libs/MO5/js/Set.js
libs/MO5/js/Size.js
libs/MO5/js/Timer.js
libs/MO5/js/TimerWatcher.js
libs/MO5/js/ajax.js
libs/MO5/js/assert.js
libs/MO5/js/dom.Element.js
libs/MO5/js/dom.effects.typewriter.js
libs/MO5/js/dom.escape.js
libs/MO5/js/easing.js
libs/MO5/js/fail.js
libs/MO5/js/globals.document.js
libs/MO5/js/globals.window.js
libs/MO5/js/range.js
libs/MO5/js/tools.js
libs/MO5/js/transform.js
libs/MO5/js/types.js
libs/MO5/libs/using.js/tests/index.js
libs/MO5/libs/using.js/tests/module1.js
libs/MO5/libs/using.js/tests/module2.js
libs/MO5/libs/using.js/tests/module3.js
libs/MO5/libs/using.js/using.js
libs/MO5/tests/node/EventBus.test.js
libs/MO5/tests/node/Set.test.js
src/savegames.js
src/tools/reveal.js
src/tools/ui.js
src/loader.js
src/tools/tools.js
src/tools/compile.js
src/functions.js
src/DisplayObject.js
src/Game.js
src/Interpreter.js
src/Keys.js
src/LoadingScreen.js
src/Trigger.js
src/assets/Audio.js
src/assets/Background.js
src/assets/Character.js
src/assets/Composite.js
src/assets/Curtain.js
src/assets/Imagepack.js
src/assets/Textbox.js
src/assets.js
src/bus.js
src/commands/alert.js
src/commands/break.js
src/commands/choice.js
src/commands/confirm.js
src/commands/do.js
src/commands/fn.js
src/commands/global.js
src/commands/globalize.js
src/commands/goto.js
src/commands/line.js
src/commands/localize.js
src/commands/prompt.js
src/commands/restart.js
src/commands/set_vars.js
src/commands/sub.js
src/commands/trigger.js
src/commands/var.js
src/commands/wait.js
src/commands/while.js
src/commands/with.js
src/commands.js
src/dataSources/LocalStorage.js
src/dataSources.js
src/engine.js
src/extensions/button.js
src/extensions/colored-rectangle.js
src/extensions/get-backtrace.js
src/extensions/hello.js
src/extensions/side-images.js
CHANGELOG.md
LICENSE.md
README.md
build.js
index.js
index.md
package.js