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/* global OC, $, _, t, Gallery, Album, GalleryImage, SlideShow */
Gallery.view = {};
Gallery.view.element = null;
Gallery.view.requestId = -1;
/**
* Removes all thumbnails from the view
*/
Gallery.view.clear = function () {
// We want to keep all the events
Gallery.view.element.children().detach();
Gallery.showLoading();
};
/**
* Populates the view if there are images or albums to show
*
* @param {string} albumPath
*/
Gallery.view.init = function (albumPath) {
if (Gallery.images.length === 0) {
Gallery.showEmpty();
} else {
// Only do it when the app is initialised
if (Gallery.view.requestId === -1) {
$('#download').click(Gallery.download);
$('button.share').click(Gallery.share);
$('#album-info-button').click(Gallery.showInfo);
}
OC.Breadcrumb.container = $('#breadcrumbs');
Gallery.view.viewAlbum(albumPath);
}
};
/**
* Starts the slideshow
*
* @param {string} path
* @param {string} albumPath
*/
Gallery.view.startSlideshow = function (path, albumPath) {
var album = Gallery.albumMap[albumPath];
var images = album.images;
var startImage = Gallery.imageMap[path];
Gallery.slideShow(images, startImage);
};
/**
* Sets up the controls and starts loading the gallery rows
*
* @param {string} albumPath
*/
Gallery.view.viewAlbum = function (albumPath) {
albumPath = albumPath || '';
if (!Gallery.albumMap[albumPath]) {
return;
}
Gallery.view.clear();
if (albumPath !== Gallery.currentAlbum) {
Gallery.view.loadVisibleRows.loading = false;
Gallery.currentAlbum = albumPath;
Gallery.view.shareButtonSetup(albumPath);
Gallery.view.infoButtonSetup();
Gallery.view.buildBreadCrumb(albumPath);
}
Gallery.albumMap[albumPath].viewedItems = 0;
Gallery.albumMap[albumPath].preloadOffset = 0;
// Each request has a unique ID, so that we can track which request a row belongs to
Gallery.view.requestId = Math.random();
Gallery.albumMap[Gallery.currentAlbum].requestId = Gallery.view.requestId;
// Loading rows without blocking the execution of the rest of the script
setTimeout(function () {
Gallery.view.loadVisibleRows.activeIndex = 0;
Gallery.view.loadVisibleRows(Gallery.albumMap[Gallery.currentAlbum], Gallery.currentAlbum);
}, 0);
};
/**
* Shows or hides the share button depending on if we're in a public gallery or not
*
* @param {string} albumPath
*/
Gallery.view.shareButtonSetup = function (albumPath) {
var shareButton = $('button.share');
if (albumPath === '' || Gallery.token) {
shareButton.hide();
} else {
shareButton.show();
}
};
/**
* Shows or hides the info button based on the information we've received from the server
*/
Gallery.view.infoButtonSetup = function () {
var infoButton = $('#album-info-button');
var infoContentElement = $('.album-info-content');
infoContentElement.slideUp();
infoContentElement.css('max-height', $(window).height() - 150);
var albumInfo = Gallery.albumsInfo[Gallery.currentAlbum];
if ($.isEmptyObject(albumInfo.description) &&
$.isEmptyObject(albumInfo.copyright) &&
$.isEmptyObject(albumInfo.copyrightLink)) {
infoButton.hide();
} else {
infoButton.show();
}
};
/**
* Loads and displays gallery rows on screen
*
* @param {Album} album
* @param {string} path
*
* @returns {boolean|null|*}
*/
Gallery.view.loadVisibleRows = function (album, path) {
// If the row is still loading (state() = 'pending'), let it load
if (Gallery.view.loadVisibleRows.loading &&
Gallery.view.loadVisibleRows.loading.state() !== 'resolved') {
return Gallery.view.loadVisibleRows.loading;
}
/**
* At this stage, there is no loading taking place (loading = false|null), so we can look for
* new rows
*/
var scroll = $('#content-wrapper').scrollTop() + $(window).scrollTop();
// 2 windows worth of rows is the limit from which we need to start loading new rows. As we
// scroll down, it grows
var targetHeight = ($(window).height() * 2) + scroll;
var showRows = function (album) {
// If we've reached the end of the album, we kill the loader
if (!(album.viewedItems < album.subAlbums.length + album.images.length)) {
Gallery.view.loadVisibleRows.loading = null;
return;
}
// Everything is still in sync, since no deferred calls have been placed yet
return album.getNextRow($(window).width()).then(function (row) {
/**
* At this stage, the row has a width and contains references to images based on
* information available when making the request, but this information may have changed
* while we were receiving thumbnails for the row
*/
if (Gallery.view.requestId === row.requestId) {
return row.getDom().then(function (dom) {
// defer removal of loading class to trigger CSS3 animation
_.defer(function () {
dom.removeClass('loading');
});
if (Gallery.currentAlbum !== path) {
Gallery.view.loadVisibleRows.loading = null;
return; //throw away the row if the user has navigated away in the
// meantime
}
if (Gallery.view.element.length === 1) {
Gallery.showNormal();
}
Gallery.view.element.append(dom);
if (album.viewedItems < album.subAlbums.length + album.images.length &&
Gallery.view.element.height() < targetHeight) {
return showRows(album);
}
// No more rows to load at the moment
Gallery.view.loadVisibleRows.loading = null;
}, function () {
// Something went wrong, so kill the loader
Gallery.view.loadVisibleRows.loading = null;
});
} else {
// This is the safest way to do things
Gallery.view.viewAlbum(Gallery.currentAlbum);
}
});
};
if (Gallery.view.element.height() < targetHeight) {
Gallery.view.loadVisibleRows.loading = true;
Gallery.view.loadVisibleRows.loading = showRows(album);
return Gallery.view.loadVisibleRows.loading;
}
};
Gallery.view.loadVisibleRows.loading = false;
/**
* Builds the breadcrumb
*
* @param {string} albumPath
*/
Gallery.view.buildBreadCrumb = function (albumPath) {
var i, crumbs, path;
OC.Breadcrumb.clear();
var albumName = $('#content').data('albumname');
if (!albumName) {
albumName = t('gallery', 'Pictures');
}
Gallery.view.pushBreadCrumb(albumName, '');
path = '';
crumbs = albumPath.split('/');
for (i = 0; i < crumbs.length; i++) {
if (crumbs[i]) {
if (path) {
path += '/' + crumbs[i];
} else {
path += crumbs[i];
}
Gallery.view.pushBreadCrumb(crumbs[i], path);
}
}
};
/**
* Adds a path to the breadcrumb
*
* @fixme Needs to shorten long paths like on the Files app
*
* @param {string} text
* @param {string} path
*/
Gallery.view.pushBreadCrumb = function (text, path) {
OC.Breadcrumb.push(text, '#' + encodeURIComponent(path));
};
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