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/*
* file-selector.js - Add support for drag and drop file selection, and paste from clipboard on supported browsers.
*
* Usage:
* $config['additional_javascript'][] = 'js/jquery.min.js';
* $config['additional_javascript'][] = 'js/ajax.js';
* $config['additional_javascript'][] = 'js/file-selector.js';
*/
function init_file_selector(max_images) {
$(document).ready(function () {
// add options panel item
if (window.Options && Options.get_tab('general')) {
Options.extend_tab('general', '<label id="file-drag-drop"><input type="checkbox">' + _('Drag and drop file selection') + '</label>');
$('#file-drag-drop>input').on('click', function() {
if ($('#file-drag-drop>input').is(':checked')) {
localStorage.file_dragdrop = 'true';
} else {
localStorage.file_dragdrop = 'false';
}
});
if (typeof localStorage.file_dragdrop === 'undefined') localStorage.file_dragdrop = 'true';
if (localStorage.file_dragdrop === 'true') $('#file-drag-drop>input').prop('checked', true);
}
});
// disabled by user, or incompatible browser.
if (localStorage.file_dragdrop == 'false' || !(window.URL.createObjectURL && window.File))
return;
// multipost not enabled
if (typeof max_images == 'undefined') {
var max_images = 1;
}
$('<div class="dropzone-wrap" style="display: none;">'+
'<div class="dropzone" tabindex="0">'+
'<div class="file-hint">'+_('Select/drop/paste files here')+'</div>'+
'<div class="file-thumbs"></div>'+
'</div>'+
'</div>'+
'</div>').prependTo('#upload td');
var files = [];
$('#upload_file').remove(); // remove the original file selector
$('.dropzone-wrap').css('user-select', 'none').show(); // let jquery add browser specific prefix
function addFile(file) {
if (files.length == max_images)
return;
files.push(file);
addThumb(file);
}
function removeFile(file) {
files.splice(files.indexOf(file), 1);
}
function getThumbElement(file) {
return $('.tmb-container').filter(function(){return($(this).data('file-ref')==file);});
}
function addThumb(file) {
var fileName = (file.name.length < 24) ? file.name : file.name.substr(0, 22) + '…';
var fileType = file.type.split('/')[0];
var fileExt = file.type.split('/')[1];
var $container = $('<div>')
.addClass('tmb-container')
.data('file-ref', file)
.append(
$('<div>').addClass('remove-btn').html('✖'),
$('<div>').addClass('file-tmb'),
$('<div>').addClass('tmb-filename').html(fileName)
)
.appendTo('.file-thumbs');
var $fileThumb = $container.find('.file-tmb');
if (fileType == 'image') {
// if image file, generate thumbnail
var objURL = window.URL.createObjectURL(file);
$fileThumb.css('background-image', 'url('+ objURL +')');
} else {
$fileThumb.html('<span>' + fileExt.toUpperCase() + '</span>');
}
}
$(document).on('ajax_before_post', function (e, formData) {
for (var i=0; i<max_images; i++) {
var key = 'file';
if (i > 0) key += i + 1;
if (typeof files[i] === 'undefined') break;
formData.append(key, files[i]);
}
});
// clear file queue and UI on success
$(document).on('ajax_after_post', function () {
files = [];
$('.file-thumbs').empty();
});
var dragCounter = 0;
var dropHandlers = {
dragenter: function (e) {
e.stopPropagation();
e.preventDefault();
if (dragCounter === 0) $('.dropzone').addClass('dragover');
dragCounter++;
},
dragover: function (e) {
// needed for webkit to work
e.stopPropagation();
e.preventDefault();
},
dragleave: function (e) {
e.stopPropagation();
e.preventDefault();
dragCounter--;
if (dragCounter === 0) $('.dropzone').removeClass('dragover');
},
drop: function (e) {
e.stopPropagation();
e.preventDefault();
$('.dropzone').removeClass('dragover');
dragCounter = 0;
var fileList = e.originalEvent.dataTransfer.files;
for (var i=0; i<fileList.length; i++) {
addFile(fileList[i]);
}
}
};
// attach handlers
$(document).on(dropHandlers);
$(document).on('click', '.dropzone .remove-btn', function (e) {
e.stopPropagation();
var file = $(e.target).parent().data('file-ref');
getThumbElement(file).remove();
removeFile(file);
});
$(document).on('keypress click', '.dropzone', function (e) {
e.stopPropagation();
// accept mouse click or Enter
if ((e.which != 1 || e.target.className != 'file-hint') &&
e.which != 13)
return;
var $fileSelector = $('<input type="file" multiple>');
$fileSelector.on('change', function (e) {
if (this.files.length > 0) {
for (var i=0; i<this.files.length; i++) {
addFile(this.files[i]);
}
}
$(this).remove();
});
$fileSelector.click();
});
$(document).on('paste', function (e) {
var clipboard = e.originalEvent.clipboardData;
if (typeof clipboard.items != 'undefined' && clipboard.items.length != 0) {
//Webkit
for (var i=0; i<clipboard.items.length; i++) {
if (clipboard.items[i].kind != 'file')
continue;
//convert blob to file
var file = new File([clipboard.items[i].getAsFile()], 'ClipboardImage.png', {type: 'image/png'});
addFile(file);
}
}
});
}
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