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WP_Optimize_Images_View = function(settings) {
var $ = jQuery,
defaults = {
container: '',
image_container_class: 'wpo_unused_image',
image_container_custom_classes: 'wpo_unused_image_row',
image_container_blog_class_prefix: 'wpo_unused_image_site_',
view_image_btn_link_class: 'wpo_unused_image_view_link',
view_image_btn_text: wpoptimize.view_image_link_text,
row_selector: '.wpo_unused_image_row',
row_id_class: 'wpo_unused_images_row_id',
row_thumb_class: 'wpo_unused_images_row_thumb',
row_file_class: 'wpo_unused_images_row_file',
row_action_class: 'wpo_unused_images_row_action',
/**
* Array with buttons shown in the list view mode.
*
* [
* {
* 'class': 'button_class',
* 'title': 'Button title',
* 'hint': 'Tooltip text'
* },
* ...
* ]
*/
row_action_buttons: [],
label_class: 'wpo_unused_image_thumb_label',
loader_additional_html: '',
action_btn_text: 'Remove',
action_btn_class: 'button button-primary wpo_unused_images_remove_single',
checkbox_class: 'wpo_unused_image__input',
list_mode_class: 'wpo_unused_image_list_view',
no_images_found_message: 'No images found',
related_elements: [],
action_buttons: [],
hide_when_empty: [],
load_next_page_callback: null,
onclear: null
},
options = jQuery.extend({}, defaults, settings),
IMAGES_VIEW_MODE = {
GRID: 'grid',
LIST: 'list'
},
images_view_mode = IMAGES_VIEW_MODE.GRID,
images_view_container = options.container,
image_container_selector = '.' + options.image_container_class,
checkbox_selector = '.' + options.checkbox_class,
last_clicked_image_id = '',
images_loaded_count = {};
/**
* Handle scroll in the images container.
*/
images_view_container.on('scroll mousewheel', function() {
load_next_page_if_need();
update_loader_position();
});
/**
* Handle Shift key state.
*/
var ctrl_shift_on_image_held = false;
images_view_container.on('mousedown', options.row_selector, function (e) {
ctrl_shift_on_image_held = e.shiftKey || e.ctrlKey;
});
images_view_container.on('mouseup', options.row_selector, function (e) {
ctrl_shift_on_image_held = e.shiftKey || e.ctrlKey;
});
/**
* Handle checked status changed for single unused image.
*/
images_view_container.on('click' , '.'+options.image_container_class , function(e) {
var check_box = $(this).find('.'+options.checkbox_class);
var image_id = check_box.attr('id');
// Toggle class on image container
if (true === check_box.prop('checked')) {
$(this).addClass('selected');
} else {
$(this).removeClass('selected');
}
if (ctrl_shift_on_image_held) {
if (true === check_box.prop('checked')) {
$(this).removeClass('selected');
check_box.prop('checked',false);
} else {
$(this).addClass('selected');
check_box.prop('checked',true);
}
if (1 <= get_selected_images().length) {
if (true === $("#"+last_clicked_image_id).prop('checked')) {
select_images(last_clicked_image_id, image_id, true === check_box.prop('checked'));
}
}
}
last_clicked_image_id = image_id;
disable_action_buttons(0 == get_selected_images().length);
});
/**
* Select or deselect images from #first_id to #last_id in the lis of unused images
*
* @param {string} first_id - first image id in the list
* @param {string} last_id - last image id in the list
* @param {bool} checked - select or deselect images
*
* @return void
*/
function select_images(first_id, last_id, checked) {
var image_id = first_id,
index1,
index2,
current,
first,
last,
done = false;
// if set first and last ids then go through the list.
if (last_id && first_id) {
// get positions in then list.
index1 = $(checkbox_selector).index($('#' + first_id));
index2 = $(checkbox_selector).index($('#' + last_id));
// check if both item exists. (possibly one of them was deleted)
if (-1 == index1) index1 = index2;
if (-1 == index2) index2 = index1;
// get correct first and last item.
if (index1 < index2) {
current = $(checkbox_selector).eq(index1).closest(image_container_selector);
last_id = $(checkbox_selector).eq(index2).attr('id');
} else {
current = $(checkbox_selector).eq(index2).closest(image_container_selector);
last_id = $(checkbox_selector).eq(index1).attr('id');
}
// select images.
while (!done) {
if (checked) {
current.addClass('selected');
$(checkbox_selector, current).prop('checked', checked);
} else {
current.removeClass('selected');
$(checkbox_selector, current).prop('checked', checked);
}
if ($(checkbox_selector, current).attr('id') == last_id) done = true;
current = current.next();
}
} else {
// if just one the first id passed then change just the first element state.
if (checked) {
$('#' + image_id).closest(image_container_selector).addClass('selected');
} else {
$('#' + image_id).closest(image_container_selector).removeClass('selected');
}
}
disable_action_buttons(0 == get_selected_images().length);
}
/**
* Disable/enable controls.
*
* @param {boolean} disabled
*/
function disable_action_buttons(disabled) {
if (!options.action_buttons) return;
$.each(options.action_buttons, function(i, el) {
el.prop('disabled', disabled)
});
}
/**
* Update view in case when then images list is empty.
*/
function hide_when_empty_elements() {
if (options.hide_when_empty) {
var images_count = $(['.', options.image_container_class,':visible'].join(''), images_view_container).length;
if (0 === images_count) {
// show message - no images found.
if (0 == $('.wpo-images-view-empty', images_view_container).length) {
images_view_container.append($('<div class="wpo-images-view-empty wpo-fieldgroup" />').text(options.no_images_found_message));
}
$('.wpo-images-view-empty', images_view_container).show();
} else {
$('.wpo-images-view-empty', images_view_container).hide();
}
$.each(options.hide_when_empty, function(i, el) {
if (images_count > 0) {
el.show();
} else {
el.hide();
}
});
}
}
/**
* Update view when images are changed.
*/
function update_view() {
if (!is_visible()) return;
hide_when_empty_elements();
disable_action_buttons(0 == get_selected_images().length);
}
/**
* Load the next part images if images container scrolled to the bottom.
*/
function load_next_page_if_need() {
if (images_view_container.scrollTop() + images_view_container.height() + 100 > images_view_container[0].scrollHeight) {
if ('function' == typeof options.load_next_page_callback) {
options.load_next_page_callback();
}
}
}
/**
* Append an image to the list.
*
* @param {int} blog_id image blog id
* @param {string} value value that will returned if image selected
* @param {string} href url opened when image clicked
* @param {string} thumbnail_url url to the image thumbnail
* @param {string} title image title
* @param {string} row_file_text text for displaying near image in the list view mode
*/
function append_image(blog_id, value, href, thumbnail_url, title, row_file_text) {
var random_id = 'image_' + (((1+Math.random())*0x10000)|0).toString(16).substring(1),
row_actions_html = '',
i;
// build button
if (options.row_action_buttons) {
for (i in options.row_action_buttons) {
if (!options.row_action_buttons.hasOwnProperty(i)) continue;
row_actions_html += [
'<button href="javascript: ;" class="',(options.row_action_buttons[i].class ? options.row_action_buttons[i].class : ''),'"',
' title="',(options.row_action_buttons[i].hint ? options.row_action_buttons[i].hint : ''),'">',(options.row_action_buttons[i].title ? options.row_action_buttons[i].title : ''),'</button>'
].join('');
}
}
// count added image.
if (!images_loaded_count.hasOwnProperty(blog_id)) images_loaded_count[blog_id] = 0;
images_loaded_count[blog_id]++;
images_view_container.append(['\
<div class="',options.image_container_class,' ',options.image_container_custom_classes,' ',options.image_container_blog_class_prefix,blog_id,'">\
<a class="button ',options.view_image_btn_link_class,'" href="',href,'" target="_blank">',
options.view_image_btn_text,
'</a>',
'<div class="',options.row_id_class,'">\
<input id="',random_id,'" type="checkbox" class="',options.checkbox_class,'" value="',value,'">\
</div>\
<div class="',options.row_thumb_class,'">\
<a href="',href,'" target="_blank">\
<img class="lazyload" src="data:image/gif;base64,R0lGODdhAQABAPAAAMPDwwAAACwAAAAAAQABAAACAkQBADs=" data-src="',thumbnail_url,'" title="',title,'" alt="',title,'">\
</a>\
</div>\
<div class="',options.row_file_class,'">\
<a href="',href,'" target="_blank">',row_file_text,'</a>\
</div>\
<div class="',options.row_action_class,'">',row_actions_html,'</div>\
<label for="',random_id,'" class="',options.label_class,'">\
<div class="thumbnail">\
<img class="lazyload" src="data:image/gif;base64,R0lGODdhAQABAPAAAMPDwwAAACwAAAAAAQABAAACAkQBADs=" data-src="',thumbnail_url,'" title="',title,'" alt="',title,'">\
</div>\
</label>\
</div>'
].join(''));
}
/**
* Show only images for the selected blog.
*
* @param {int} blog_id
*/
function filter_by_site(blog_id) {
$(image_container_selector, images_view_container).hide();
$(['.',options.image_container_blog_class_prefix, blog_id].join(''), images_view_container).show();
update_view();
}
/**
* Get count of loaded images for the selected blog.
*
* @param {int} blog_id
*
* @return {number}
*/
function get_images_count(blog_id) {
if (!images_loaded_count.hasOwnProperty(blog_id)) return 0;
return images_loaded_count[blog_id];
}
/**
* Get count of loaded images currently displayed in the view container.
*
* @param {int} blog_id
*/
function get_visible_images_count(blog_id) {
return $(['.',options.image_container_blog_class_prefix, blog_id].join(''), images_view_container).length;
}
/**
* Switch view mode grid/list.
*
* @param mode
*/
function switch_view_mode(mode) {
if (mode === images_view_mode) return;
images_view_mode = mode;
if (mode === IMAGES_VIEW_MODE.GRID) {
images_view_container.removeClass(options.list_mode_class);
}
if (mode === IMAGES_VIEW_MODE.LIST) {
images_view_container.addClass(options.list_mode_class);
}
}
/**
* Get list of selected images.
*
* @return {Array}
*/
function get_selected_images() {
var selected_images = [];
// if no any selected images then exit.
if (0 == $('input[type="checkbox"]', images_view_container).length) return selected_images;
// build list of visible selected images .
$(['.',options.image_container_class,':visible input:checked'].join(''), images_view_container).each(function() {
selected_images.push($(this).val());
});
return selected_images;
}
/**
* Remove selected images.
*/
function remove_selected_images() {
var image_container_selector = ['.',options.image_container_class].join('');
$([image_container_selector,':visible input:checked'].join(''), images_view_container).each(function() {
$(this).closest(image_container_selector).remove();
});
}
/**
* Show images container.
*/
function show() {
images_view_container.show();
$(options.related_elements).each(function() {
$(this).show();
});
update_view();
load_next_page_if_need();
}
/**
* Hide images container.
*/
function hide() {
images_view_container.hide();
$(options.related_elements).each(function() {
$(this).hide();
});
}
/**
* Check if images container element is visible.
*
* @return {boolean}
*/
function is_visible() {
return images_view_container.is(':visible');
}
/**
* Show loader.
*/
function show_loader() {
show_custom_loader(wpoptimize.loading_data, '', options.loader_additional_html);
}
/**
* Show loader with custom content.
*
* @param {string} title
* @param {string} message
* @param {string} custom_html
*/
function show_custom_loader(title, message, custom_html) {
message = message ? message : '';
custom_html = custom_html ? custom_html : '';
images_view_container.css({ 'min-height' : '220px' });
images_view_container.append([
'<div class="wpo_shade">',
'<div class="wpo_shade_inner">',
'<span class="dashicons dashicons-update-alt wpo-rotate"></span>',
'<h4>',title,'</h4>',
'<p class="wpo-shade-progress-message">',message,'</p>',
custom_html,
'</div>',
'</div>',
].join(''));
update_loader_position();
}
/**
* Hide loader.
*/
function hide_loader() {
images_view_container.css('min-height', 'initial');
$('.wpo_shade', images_view_container).remove();
}
/**
* Update top property for shade div with loader.
*/
function update_loader_position() {
$('.wpo_shade', images_view_container).css('top', images_view_container.scrollTop() + 'px');
}
/**
* Set message for under loader icon.
*
* @param {string} message
*/
function loader_message(message) {
$('.wpo-shade-progress-message', images_view_container).html(message);
}
/**
* Select all images.
*/
function select_all() {
$('.wpo_unused_image__input').each(function() {
if (!$(this).prop('checked')) {
$(this).closest('.wpo_unused_image').addClass('selected');
$(this).prop('checked', true);
last_clicked_image_id = null;
disable_action_buttons(0 == get_selected_images().length);
}
});
}
/**
* Deselect all images.
*/
function select_none() {
$('.wpo_unused_image__input').each(function() {
if ($(this).prop('checked')) {
$(this).closest('.wpo_unused_image').removeClass('selected');
$(this).prop('checked', false);
last_clicked_image_id = null;
disable_action_buttons(0 == get_selected_images().length);
}
});
}
/**
* Clear images container.
*/
function clear() {
$(['.', options.image_container_class].join(''), images_view_container).remove();
images_loaded_count = {};
disable_action_buttons(true);
// if defined on clear event then call it.
if ('function' === typeof options.onclear) {
options.onclear();
}
}
/**
* Reload view items.
*/
function reload() {
clear();
load_next_page_if_need();
}
return {
show: show,
hide: hide,
clear: clear,
reload: reload,
show_loader: show_loader,
show_custom_loader: show_custom_loader,
hide_loader: hide_loader,
loader_message: loader_message,
append_image: append_image,
get_selected_images: get_selected_images,
remove_selected_images: remove_selected_images,
get_images_count: get_images_count,
get_visible_images_count: get_visible_images_count,
load_next_page_if_need: load_next_page_if_need,
filter_by_site: filter_by_site,
switch_view_mode: switch_view_mode,
select_all: select_all,
select_none: select_none,
is_visible: is_visible,
update_view: update_view
}
};