photofloat/web/js/011-display.js

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$(document).ready(function() {
/*
* The display is not yet object oriented. It's procedural code
* broken off into functions. It makes use of libphotofloat's
* PhotoFloat class for the network and management logic.
*
* All of this could potentially be object oriented, but presently
* it should be pretty readable and sufficient. The only thing to
* perhaps change in the future would be to consolidate calls to
* jQuery selectors. And perhaps it'd be nice to move variable
* declarations to the top, to stress that JavaScript scope is
* for an entire function and always hoisted.
*
* None of the globals here polutes the global scope, as everything
* is enclosed in an anonymous function.
*
*/
/* Globals */
var currentAlbum = null;
var currentPhoto = null;
var currentPhotoIndex = -1;
var previousAlbum = null;
var previousPhoto = null;
var originalTitle = document.title;
var photoFloat = new PhotoFloat();
/* Displays */
function setTitle() {
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var title = "", documentTitle = "", last = "", components, i;
if (!currentAlbum.path.length)
components = [originalTitle];
else {
components = currentAlbum.path.split("/");
components.unshift(originalTitle);
}
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if (currentPhoto !== null)
documentTitle += photoFloat.trimExtension(currentPhoto.name);
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for (i = 0; i < components.length; ++i) {
if (i || currentPhoto !== null)
documentTitle += " \u00ab ";
if (i)
last += "/" + components[i];
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if (i < components.length - 1 || currentPhoto !== null)
title += "<a href=\"#!/" + (i ? photoFloat.cachePath(last.substring(1)) : "") + "\">";
title += components[i];
documentTitle += components[components.length - 1 - i];
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if (i < components.length - 1 || currentPhoto !== null) {
title += "</a>";
title += " &raquo; ";
}
}
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if (currentPhoto !== null)
title += photoFloat.trimExtension(currentPhoto.name);
$("#title").html(title);
document.title = documentTitle;
}
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function scrollToThumb() {
var photo, thumb;
photo = currentPhoto;
if (photo === null) {
photo = previousPhoto;
if (photo === null)
return;
}
$("#thumbs img").each(function() {
if (this.photo === photo) {
thumb = $(this);
return false;
}
});
if (typeof thumb === "undefined")
return;
if (currentPhoto !== null) {
var scroller = $("#album-view");
scroller.stop().animate({ scrollLeft: thumb.position().left + scroller.scrollLeft() - scroller.width() / 2 + thumb.width() / 2 }, "slow");
} else
$("html, body").stop().animate({ scrollTop: thumb.offset().top - $(window).height() / 2 + thumb.height() }, "slow");
if (currentPhoto !== null) {
$("#thumbs img").removeClass("current-thumb");
thumb.addClass("current-thumb");
}
}
function showAlbum(populate) {
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var i, link, image, photos, thumbsElement, subalbums, subalbumsElement;
if (currentPhoto === null && previousPhoto === null)
$("html, body").stop().animate({ scrollTop: 0 }, "slow");
if (populate) {
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photos = [];
for (i = 0; i < currentAlbum.photos.length; ++i) {
link = $("<a href=\"#!/" + photoFloat.photoHash(currentAlbum, currentAlbum.photos[i]) + "\"></a>");
image = $("<img title=\"" + photoFloat.trimExtension(currentAlbum.photos[i].name) + "\" alt=\"" + photoFloat.trimExtension(currentAlbum.photos[i].name) + "\" src=\"" + photoFloat.photoPath(currentAlbum, currentAlbum.photos[i], 150, true) + "\" height=\"150\" width=\"150\" />");
link.append(image);
image.get(0).photo = currentAlbum.photos[i];
photos.push(link);
}
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thumbsElement = $("#thumbs");
thumbsElement.empty();
thumbsElement.append.apply(thumbsElement, photos);
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subalbums = [];
for (i = currentAlbum.albums.length - 1; i >= 0; --i) {
link = $("<a href=\"#!/" + photoFloat.albumHash(currentAlbum.albums[i]) + "\"></a>");
image = $("<div title=\"" + currentAlbum.albums[i].date + "\" class=\"album-button\">" + currentAlbum.albums[i].path + "</div>");
link.append(image);
subalbums.push(link);
(function(theAlbum, theImage) {
photoFloat.albumPhoto(theAlbum, function(album, photo) {
theImage.css("background-image", "url(" + photoFloat.photoPath(album, photo, 150, true) + ")");
});
})(currentAlbum.albums[i], image);
}
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subalbumsElement = $("#subalbums");
subalbumsElement.empty();
subalbumsElement.append.apply(subalbumsElement, subalbums);
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if (currentAlbum.albums.length > 1)
subalbumsElement.insertBefore(thumbsElement);
else
thumbsElement.insertBefore(subalbumsElement);
}
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if (currentPhoto === null) {
$("#thumbs img").removeClass("current-thumb");
$("#album-view").removeClass("photo-view-container");
$("#subalbums").show();
$("#photo-view").hide();
}
setTimeout(scrollToThumb, 1);
}
function getDecimal(fraction) {
if (fraction[0] < fraction[1])
return fraction[0] + "/" + fraction[1];
return (fraction[0] / fraction[1]).toString();
}
function scaleImage() {
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var image, container;
image = $("#photo");
if (image.get(0) === this)
$(window).bind("resize", scaleImage);
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container = $("#photo-view");
if (image.css("width") !== "100%" && container.height() * image.attr("ratio") > container.width())
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image.css("width", "100%").css("height", "auto").css("position", "absolute").css("bottom", 0);
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else if (image.css("height") !== "100%")
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image.css("height", "100%").css("width", "auto").css("position", "").css("bottom", "");
}
function showPhoto() {
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var maxSize, width, height, photoSrc, previousPhoto, nextPhoto, nextLink, text;
maxSize = 800;
width = currentPhoto.size[0];
height = currentPhoto.size[1];
if (width > height) {
height = height / width * maxSize;
width = maxSize;
} else {
width = width / height * maxSize;
height = maxSize;
}
$(window).unbind("resize", scaleImage);
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photoSrc = photoFloat.photoPath(currentAlbum, currentPhoto, maxSize, false);
$("#photo")
.attr("width", width).attr("height", height).attr("ratio", currentPhoto.size[0] / currentPhoto.size[1])
.attr("src", photoSrc)
.attr("alt", currentPhoto.name)
.attr("title", currentPhoto.date)
.load(scaleImage);
$("head").append("<link rel=\"image_src\" href=\"" + photoSrc + "\" />");
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previousPhoto = currentAlbum.photos[
(currentPhotoIndex - 1 < 0) ? (currentAlbum.photos.length - 1) : (currentPhotoIndex - 1)
];
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nextPhoto = currentAlbum.photos[
(currentPhotoIndex + 1 >= currentAlbum.photos.length) ? 0 : (currentPhotoIndex + 1)
];
$.preloadImages(photoFloat.photoPath(currentAlbum, nextPhoto, maxSize, false), photoFloat.photoPath(currentAlbum, previousPhoto, maxSize, false));
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nextLink = "#!/" + photoFloat.photoHash(currentAlbum, nextPhoto);
$("#next-photo").attr("href", nextLink);
$("#next").attr("href", nextLink);
$("#back").attr("href", "#!/" + photoFloat.photoHash(currentAlbum, previousPhoto));
$("#original-link").attr("target", "_blank").attr("href", photoFloat.originalPhotoPath(currentAlbum, currentPhoto));
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text = "<table>";
if (typeof currentPhoto.make !== "undefined") text += "<tr><td>Camera Maker</td><td>" + currentPhoto.make + "</td></tr>";
if (typeof currentPhoto.model !== "undefined") text += "<tr><td>Camera Model</td><td>" + currentPhoto.model + "</td></tr>";
if (typeof currentPhoto.date !== "undefined") text += "<tr><td>Time Taken</td><td>" + currentPhoto.date + "</td></tr>";
if (typeof currentPhoto.size !== "undefined") text += "<tr><td>Resolution</td><td>" + currentPhoto.size[0] + " x " + currentPhoto.size[1] + "</td></tr>";
if (typeof currentPhoto.aperture !== "undefined") text += "<tr><td>Aperture</td><td> f/" + getDecimal(currentPhoto.aperture) + "</td></tr>";
if (typeof currentPhoto.focalLength !== "undefined") text += "<tr><td>Focal Length</td><td>" + getDecimal(currentPhoto.focalLength) + " mm</td></tr>";
if (typeof currentPhoto.subjectDistanceRange !== "undefined") text += "<tr><td>Subject Distance Range</td><td>" + currentPhoto.subjectDistanceRange + "</td></tr>";
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if (typeof currentPhoto.iso !== "undefined") text += "<tr><td>ISO</td><td>" + currentPhoto.iso + "</td></tr>";
if (typeof currentPhoto.sceneCaptureType !== "undefined") text += "<tr><td>Scene Capture Type</td><td>" + currentPhoto.sceneCaptureType + "</td></tr>";
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if (typeof currentPhoto.exposureTime !== "undefined") text += "<tr><td>Exposure Time</td><td>" + getDecimal(currentPhoto.exposureTime) + " sec</td></tr>";
if (typeof currentPhoto.exposureProgram !== "undefined") text += "<tr><td>Exposure Program</td><td>" + currentPhoto.exposureProgram + "</td></tr>";
if (typeof currentPhoto.exposureCompensation !== "undefined") text += "<tr><td>Exposure Compensation</td><td>" + getDecimal(currentPhoto.exposureCompensation) + "</td></tr>";
if (typeof currentPhoto.spectralSensitivity !== "undefined") text += "<tr><td>Spectral Sensitivity</td><td>" + currentPhoto.spectralSensitivity + "</td></tr>";
if (typeof currentPhoto.sensingMethod !== "undefined") text += "<tr><td>Sensing Method</td><td>" + currentPhoto.sensingMethod + "</td></tr>";
if (typeof currentPhoto.lightSource !== "undefined") text += "<tr><td>Light Source</td><td>" + currentPhoto.lightSource + "</td></tr>";
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if (typeof currentPhoto.flash !== "undefined") text += "<tr><td>Flash</td><td>" + currentPhoto.flash + "</td></tr>";
if (typeof currentPhoto.orientation !== "undefined") text += "<tr><td>Orientation</td><td>" + currentPhoto.orientation + "</td></tr>";
text += "</table>";
$("#metadata").html(text);
$("#album-view").addClass("photo-view-container");
$("#subalbums").hide();
$("#photo-view").show();
}
/* Error displays */
function die() {
$("#error-overlay").fadeTo(500, 0.8);
$("#error-text").fadeIn(2500);
$("body, html").css("overflow", "hidden");
}
function undie() {
$("#error-text, #error-overlay").fadeOut(500);
$("body, html").css("overflow", "auto");
}
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/* Entry point for most events */
function hashParsed(album, photo, photoIndex) {
undie();
$("#loading").hide();
if (album === currentAlbum && photo === currentPhoto)
return;
previousAlbum = currentAlbum;
previousPhoto = currentPhoto;
currentAlbum = album;
currentPhoto = photo;
currentPhotoIndex = photoIndex;
setTitle();
showAlbum(previousAlbum !== currentAlbum);
if (photo !== null)
showPhoto();
}
/* Event listeners */
$(window).hashchange(function() {
$("#loading").show();
$("link[rel=image_src]").remove();
if (location.search.indexOf("?_escaped_fragment_=") === 0) {
location.hash = location.search.substring(20);
location.search = "";
}
photoFloat.parseHash(location.hash, hashParsed, die);
});
$(window).hashchange();
$(document).keydown(function(e){
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if (currentPhoto === null)
return true;
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if (e.keyCode === 39) {
window.location.href = $("#next").attr("href");
return false;
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} else if (e.keyCode === 37) {
window.location.href = $("#back").attr("href");
return false;
}
return true;
});
$(document).mousewheel(function(event, delta) {
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if (currentPhoto === null)
return true;
if (delta < 0) {
window.location.href = $("#next").attr("href");
return false;
} else if (delta > 0) {
window.location.href = $("#back").attr("href");
return false;
}
return true;
});
$("#photo-box").mouseenter(function() {
$("#photo-links").stop().fadeTo("slow", 0.50).css("display", "inline");
});
$("#photo-box").mouseleave(function() {
$("#photo-links").stop().fadeOut("slow");
});
$("#next, #back").mouseenter(function() {
$(this).fadeTo("slow", 1);
});
$("#next, #back").mouseleave(function() {
$(this).fadeTo("slow", 0.35);
});
$("#metadata-link").click(function() {
if (!$("#metadata").is(":visible"))
$("#metadata").stop()
.css("height", 0)
.css("padding-top", 0)
.css("padding-bottom", 0)
.show()
.animate({ height: $("#metadata > table").height(), paddingTop: 3, paddingBottom: 3 }, "slow", function() {
$(this).css("height", "auto");
$("#metadata-link").text($("#metadata-link").text().replace("show", "hide"));
});
else
$("#metadata").stop().animate({ height: 0, paddingTop: 0, paddingBottom: 0 }, "slow", function() {
$(this).hide();
$("#metadata-link").text($("#metadata-link").text().replace("hide", "show"));
});
});
});