gallery/app/assets/javascripts/theater-widget.js

var GalleryTheaterWidget = function(widget) {
    var parent_divs = widget,
        parent_div_z_index = parent_divs.eq(parent_divs.length - 1).css('z-index')
    parent_divs.eq(parent_divs.length - 1).css('z-index', '2000')
    var currentPic = {},
        windowHeight = 0,
        windowWidth = 0,
        swipeController = null,
        resizing = null,
        loadingInterval = null,
        mainPicLoading = 0,
        nextPicLoading = 0,
        prevPicLoading = 0,
        currentSwipeImageDom = null,
        currentSwipeImageDomLeftPos = 0,
        windowScreenThresholdForTouch = 0,
        loadingProcess = 0,
        stage = null,
        stripNextBtn = null,
        stripPrevBtn = null,
        thumbToggle = null,
        descriptionToggle = null,
        closeBtn = null,
        switchBtn = null,
        imageContainer = null,
        albumData = {},
        loader = null,
        thumbStrip = null,
        descriptionArea = null,
        isTheaterInitialized = false;

    var play_flag = false;
    var button_left_string = '<button id ="theaterPreviousButton" class="theaterButton">< </button>',
        button_right_string = '<button id ="theaterNextButton" class="theaterButton">> </button>',
        button_play_string = '<button id ="theaterPlayButton" class="theaterButton">▶ </button>',
        button_stop_string = '<button id ="theaterStopButton" class="theaterButton">|| </button>',
        playtimeoutID;
    var initialize = function() {
        stage = widget.find('#gallery-theater-stage');
        closeBtn = stage.find(".gallery-close");
        switchBtn = stage.find(".gallery-theme-switch");
        imageContainer = stage.find(".image-container");
        thumbStrip = stage.find(".gallery-thumb-wrap");
        thumbToggle = stage.find(".gallery-thumb-toggle");
        loader = stage.find(".gallery-loader");
        stripNextBtn = stage.find(".gallery-thumb-next");
        stripPrevBtn = stage.find(".gallery-thumb-prev");
        descriptionArea = stage.find(".gallery-img-desc");
        descriptionToggle = stage.find(".gallery-toggle-desc");
        windowScreenThresholdForTouch = windowWidth / 3;
        startLoading();
        windowHeight = $(window).height();
        windowWidth = $(window).width();
        var addButton = function() {
            widget.find('.theaterButton').remove();
            if (!play_flag) {
                $(button_left_string + button_play_string + button_right_string).insertAfter(widget.find('img.gal-active'));
            } else {
                $(button_left_string + button_stop_string + button_right_string).insertAfter(widget.find('img.gal-active'));
            }
            if (!widget.find(".gal-prev").length) {
                widget.find('#theaterPreviousButton').remove();
            }
            if (!widget.find(".gal-next").length) {
                widget.find('#theaterNextButton').remove();
            }

            widget.find('#theaterPreviousButton').click(function() {
                previousPic();
                addButton()
            });
            widget.find('#theaterNextButton').click(function() {
                nextPic();
                addButton()
            });
            widget.find('#theaterPlayButton').click(function() {
                play_flag = true;
                playtimeoutID = window.setInterval(function() {
                    playallPic();
                }, 3000)
                addButton()
            });
            widget.find('#theaterStopButton').click(function() {
                play_flag = false;
                addButton()
                window.clearInterval(playtimeoutID)
            });
        }
        bindHandler();
        createTheater();

        addButton();

    }

    var bindHandler = function() {
        // handler to close the theater
        closeBtn.on("click", destroyTheater);

        // handler to show theater
        widget.find("div[data-list=images] a").on("click", function() {
            createTheater();
            return false;
        })

        switchBtn.on("click", switchTheme);
        descriptionToggle.on("click", toggleDescription)
        stripPrevBtn.on("click", scrollStripRight);
        stripNextBtn.on("click", scrollStripLeft);

        if (Modernizr.touch) {
            imageContainer.swipe({
                swipe: function(event, direction, distance, duration, fingerCount) {
                    if (direction == "left") {
                        nextPic();
                    } else if (direction == "right") {
                        previousPic();
                    }
                }
            })
            thumbToggle.swipe({
                swipe: function(event, direction, distance, duration, fingerCount) {
                    if (direction == "up") {
                        thumbStrip.parent().addClass("show");
                        thumbToggle.addClass("up");
                        thumbToggle.find("i").removeClass("fa-angle-double-up").addClass("fa-angle-double-down");
                    } else if (direction == "down") {
                        thumbStrip.parent().removeClass("show");
                        thumbToggle.removeClass("up");
                        thumbToggle.find("i").removeClass("fa-angle-double-down").addClass("fa-angle-double-up");
                    }
                }
            })
        }

        //handler for window resize
        $(window).resize(function() {
            clearTimeout(resizing);
            resizing = setTimeout(doneResizing, 1000);
        })
    }

    var bindKeyHandlers = function() {
        if (!Modernizr.touch) {
            widget.on("click", ".gal-active", nextPic);
            widget.on("click", ".gal-prev", previousPic);
            widget.on("click", ".gal-next", nextPic);
            $(document).on("keyup", function(e) {
                switch (e.keyCode) {
                    case 39:
                        nextPic();
                        break;
                    case 37:
                        previousPic();
                        break;
                    case 27:
                        destroyTheater();
                        break;
                }
            })
        }
    }


    var doneResizing = function() {
        windowHeight = $(window).height();
        windowWidth = $(window).width();
        setThumbNavs();
    }

    var unBindKeyHandlers = function() {
        $(document).unbind("keyup");
    }

    var destroyTheater = function() {
        parent_divs.eq(parent_divs.length - 1).css('z-index', parent_div_z_index)
        stage.hide();
        widget.removeClass("gallery-mode-on");
        imageContainer.empty()
        unBindKeyHandlers();
    }

    var createTheater = function() {
        stage.show();
        widget.addClass("gallery-mode-on");
        bindKeyHandlers();
        isTheaterInitialized = false;
        albumData = {}
        albumData.images = $.map(widget.find('img.gallery-thumb'), function(v) {
            var url = $(v).attr('data-link'),
                theater_url = $(v).attr('data-theater-url'),
                thumb_url = $(v).attr('src')
            return {
                'url': url,
                'file': {
                    'theater': {
                        url: theater_url
                    },
                    'thumb': {
                        url: thumb_url
                    }
                }
            }
        })
        var cp = albumData.images[0];
        currentPic = {
            "image": cp,
            "index": 0
        };
        createThumbStrip();

        currentPic = currentPic;
    }

    var hasNextImage = function() {
        return (currentPic.index + 1) <= (albumData.images.length - 1);
    }

    var hasPreviousImage = function() {
        return (currentPic.index > 0);
    }

    var nextPic = function() {
        if (loadingProcess == 0) {
            if (hasNextImage()) {
                startLoading();
                currentPic.image = albumData.images[currentPic.index + 1];
                currentPic.index = currentPic.index + 1;
                setMainPic("next");
            }
        }
    }
    var playallPic = function() {
        if (loadingProcess == 0) {
            mainPicLoading = 1;
            nextPicLoading = 1;
            prevPicLoading = 1;
            if (hasNextImage()) {
                currentPic.image = albumData.images[currentPic.index + 1];
                currentPic.index = currentPic.index + 1;
                setMainPic("next");
            } else {
                currentPic.image = albumData.images[0];
                currentPic.index = 0;
                setMainPic();
                isTheaterInitialized = false;
                setTimeout(function() {
                    loadingProcess = 0;
                    nextPicLoading = 0;
                    widget.find('.theaterButton').remove()
                    widget.find("img.gallery-image.gal-prev.gal-inactive").remove();
                    img = widget.find("img.gallery-image.gal-active");
                    img.eq(0).remove();
                }, 100)
            }
        }
    }


    var previousPic = function() {
        if (loadingProcess == 0) {
            if (hasPreviousImage()) {
                startLoading();
                currentPic.image = albumData.images[currentPic.index - 1];
                currentPic.index = currentPic.index - 1;
                setMainPic("prev");
            }
        }
    }

    var scrollStripLeft = function() {
        pixels_to_move = parseInt(thumbStrip.css("left")) - (66 * 3);
        maximum_pixels = (windowWidth / 2) - (66 * (albumData.images.length - 1));
        if (pixels_to_move < maximum_pixels) {
            pixels_to_move = maximum_pixels;
        }
        thumbStrip.css("left", pixels_to_move + "px");
    }

    var scrollStripRight = function() {
        pixels_to_move = parseInt(thumbStrip.css("left")) + (66 * 3);
        maximum_pixels = (windowWidth / 2);
        if (pixels_to_move > maximum_pixels) {
            pixels_to_move = maximum_pixels;
        }
        thumbStrip.css("left", pixels_to_move + "px");
    }


    var switchTheme = function() {
        var themeWhiteKlass = "theme-white",
            nightKlass = "fa fa-circle",
            dayKlass = "fa fa-circle-o",
            $body = widget;

        if (!switchBtn.hasClass(themeWhiteKlass)) {
            switchBtn
                .addClass(themeWhiteKlass)
                .find("i")
                .attr("class", dayKlass);

            $body.addClass(themeWhiteKlass);

        } else {
            switchBtn
                .removeClass(themeWhiteKlass)
                .find("i")
                .attr("class", nightKlass);

            $body.removeClass(themeWhiteKlass);

        }
    }

    var toggleDescription = function() {
        $(this).toggleClass("active");
        descriptionArea.toggleClass("active");
    }

    var startLoading = function() {
        loadingProcess = 1;
        mainPicLoading = 0;
        nextPicLoading = 0;
        prevPicLoading = 0;
        loader.show();
        loadingInterval = setInterval(stopLoading, 300);

    }

    var stopLoading = function() {
        if (mainPicLoading == 1 && nextPicLoading == 1 && prevPicLoading == 1) {
            clearInterval(loadingInterval);
            setTimeout(function() {
                loadingProcess = 0;
                loader.hide();
            }, 100)
        }
    }

    var createThumbStrip = function() {
        if (!isTheaterInitialized) {
            thumbStrip.html('')
            $.each(albumData.images, function(index, image) {
                var li = $("<li class='gallery-item'></li>"),
                    a = $("<a style=\"cursor: pointer;\"></a>"),
                    img = $("<img class='gallery-thumb' src='' alt='Image Thumb'>");
                a.on("click", function() {
                    startLoading();
                    var old_index = currentPic.index;
                    currentPic.image = albumData.images[index];
                    currentPic.index = index;
                    if (old_index > index) {
                        setMainPic("prev", true);
                    } else if (old_index < index) {
                        setMainPic("next", true);
                    }
                    return false;
                })

                img.attr("src", image.file.thumb.url);
                img.attr("alt", image.alt_title);
                li.attr("data-index", index);
                a.append(img);
                li.append(a);
                thumbStrip.append(li);
            })
            setThumbNavs();
        }
        setMainPic();
    }


    var setThumbNavs = function() {
        var $thumbNav = stage.find('.gallery-thumb-navs'),
            $thumb = thumbStrip.find('img'),
            thumbs = $thumb.length,
            thumbWidth = $thumb.eq(0).width(),
            thumbGap = parseInt($thumb.closest('li').css('margin-right'), 10),
            widthSum = (thumbWidth + thumbGap) * thumbs,
            margin = widthSum * 0.1,
            totalWidth = widthSum + margin;

        if (windowWidth < totalWidth) {
            $thumbNav.addClass('show');
        } else {
            $thumbNav.removeClass('show');
        }
    };

    function one_load(img) {
        if (img[0].complete) {
            setTimeout(loaded(img), 100)
        } else {
            setTimeout(one_load, 20)
        }
    }

    function loaded(img) {
        calculateHeight(img);
        mainPicLoading = 1;
        img.fadeIn(100);
    }
    window.setMainPic = function(direction, selectedFromStrip) {
        var img = null;
        widget.find('div.gallery-show-original a').eq(0).attr('href', currentPic.image.url)
        if (direction == null) {
            img = $("<img class='gallery-image gal-active'>");
            img.hide();
            img.attr("src", currentPic.image.file.theater.url);
            imageContainer.append(img);
            img.one("load", function() {
                one_load(img)
            })
            isTheaterInitialized = true;
        } else {
            img = imageContainer.find(".gal-active");
            if (selectedFromStrip) {
                imageContainer.find(".gal-" + direction).attr("src", currentPic.image.file.theater.url);
            }
            if (direction == "next") {
                imageContainer.find(".gal-prev").remove();
                img.removeClass("gal-active").addClass("gal-prev gal-inactive temp");
                imageContainer.find(".gal-next").removeClass("gal-inactive gal-next").addClass("gal-active");
                thumbStrip.css("left", (parseInt(thumbStrip.css("left")) - 66) + "px");
            } else if (direction == "prev") {
                imageContainer.find(".gal-next").remove();
                img.removeClass("gal-active").addClass("gal-next gal-inactive temp");
                imageContainer.find(".gal-prev").removeClass("gal-inactive gal-prev").addClass("gal-active");
                thumbStrip.css("left", (parseInt(thumbStrip.css("left")) + 66) + "px");
            }
            mainPicLoading = 1;
        }
        descriptionArea.html("<p>" + currentPic.image.description + "</p>");
        if (currentPic.image.description == null) {
            descriptionArea.addClass("hide");
        } else {
            descriptionArea.removeClass("hide");
        }
        if (direction != null) {
            calculateHeight(imageContainer.find(".gal-active"));
        }
        thumbStrip.find("li.active").removeClass("active");
        thumbStrip.find("li[data-index=" + currentPic.index + "]").addClass("active");

        setStripToCenter();
        setNextPic();
        setPrevPic();
    }

    var calculateHeight = function(img) {
        var h = 0,
            w = 0,
            new_width = 0;
        if (!Modernizr.touch) {
            if (typeof currentPic.image.height == "undefined") {
                h = img.height();
                currentPic.image.height = h;
                w = img.width();
                currentPic.image.width = w;
            } else {
                h = currentPic.image.height;
                w = currentPic.image.width;
            }
        } else {
            h = img.height();
            w = img.width();
        }
        if (h > (windowHeight - 150)) {
            new_width = Math.round((windowHeight - 100) * w / h);
            new_width = (new_width / windowWidth) * 100;
            img.width(new_width + "%");
        } else {
            if (windowWidth < 770) {
                img.width("90%");
            } else {
                img.width("65%");
            }
        }
        if (typeof set_gallery_height != 'undefined') {
            set_gallery_height(widget)
        }
    }

    var setStripToCenter = function() {
        left = (windowWidth / 2) - (66 * currentPic.index);
        thumbStrip.css("left", left + "px");
    }

    var setNextPic = function() {
        imageContainer.find(".gal-next.temp").remove()
        if (hasNextImage()) {
            var obj = albumData.images[currentPic.index + 1],
                nextImg = $("<img class='gallery-image gal-next gal-inactive'>");
            nextImg.attr("src", obj.file.theater.url);
            nextImg.hide();
            imageContainer.append(nextImg);
            nextImg.on("load", function() {
                calculateHeight(nextImg);
                nextPicLoading = 1;
                nextImg.fadeIn(100);
            })
        } else {
            nextPicLoading = 1;
        }
    }

    var setPrevPic = function() {
        imageContainer.find(".gal-prev.temp").remove()
        if (hasPreviousImage()) {
            var obj = albumData.images[currentPic.index - 1],
                prevImg = $("<img class='gallery-image gal-prev gal-inactive'>");
            prevImg.attr("src", obj.file.theater.url);
            prevImg.hide();
            imageContainer.prepend(prevImg);
            prevImg.on("load", function() {
                calculateHeight(prevImg);
                prevPicLoading = 1;
                prevImg.fadeIn(100);
            })
        } else {
            prevPicLoading = 1;
        }
    }

    var l = function(x) {
        console.log(x)
    }

    initialize();
}
if (typeof bind_gallery_widget_slide == 'undefined') {
    function set_gallery_height(widget) {
        var h = widget.find('.gallery-thumb-container').height() + widget.find('.gallery-image.gal-active').height() + widget.find('.gallery-actions').height() + widget.find('.theaterButton').height() + 20
        widget.find('.show-gallery-2.gallery').css('height', h)
    }
    var bind_gallery_widget_slide = function() {
        $('.widget-gallery.widget5').each(function() {
            GalleryTheaterWidget($(this));
            $(window).resize(function() {
                set_gallery_height($(this))
            });
        })
    }
    $(document).ready(function() {
        bind_gallery_widget_slide()
    })
}

// gallery-image gal-prev gal-inactive