decktape/plugins/bespoke.js

exports.help =
    'Requires the bespoke-extern module to expose the Bespoke.js API to a global variable named\n' +
    '\'bespoke\' and provides access to the collection of deck instances via \'bespoke.decks\'\n' +
    'and the most recent deck via \'bespoke.deck\'.';

exports.create = function (page) {
    return new Bespoke(page);
};

function Bespoke(page) {
    this.page = page;
}

Bespoke.prototype = {

    getName: function () {
        return 'Bespoke.js';
    },

    isActive: function () {
        return page.evaluate(function () {
            return (window.bespoke || {}).deck ? (deck = bespoke.deck) : false;
        });
    },

    configure: function () {
        page.evaluate(function () {
            document.body.classList.add('export');
            if (deck.parent.classList.contains('bespoke-overview')) deck.fire('overview');
            deck.slide(0);
            // Advance to last build on first slide (internal state in bespoke-bullets makes this tricky)
            var builds = 0, one = (deck.slides.length === 1);
            if (one) deck.slides.push(document.createElement('section'));
            do ++builds && deck.next(); while (deck.slide() === 0);
            for (var i = 0; i < builds; i++) i === 0 ? deck.slide(0) : deck.next();
            if (one) deck.slides.splice(-1, 1);
        });
    },

    size: function () {
        return page.evaluate(function () {
            var style = getComputedStyle(deck.slides[0]);
            return {
                width: parseInt(style.width, 10),
                height: parseInt(style.height, 10)
            };
        });
    },

    slideCount: function () {
        return page.evaluate(function () {
            return deck.slides.length;
        });
    },

    currentSlideIndex: function () {
        return page.evaluate(function () {
            return deck.slide() + 1;
        });
    },

    nextSlide: function () {
        page.evaluate(function () {
            // Advance to last build on next slide (internal state in bespoke-bullets makes this tricky)
            var next = deck.slide() + 1, beforeLast = (next === deck.slides.length - 1), builds = 0;
            if (beforeLast) deck.slides.push(document.createElement('section'));
            do ++builds && deck.next(); while (deck.slide() <= next);
            for (var i = 1; i < builds; i++) i === 1 ? deck.slide(next) : deck.next();
            if (beforeLast) deck.slides.splice(-1, 1);
        });
    }
};