99 lines
3.2 KiB
JavaScript
99 lines
3.2 KiB
JavaScript
/* vim: ts=4:sw=4:expandtab
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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var Whisper = Whisper || {};
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(function () {
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'use strict';
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Whisper.FileInputView = Backbone.View.extend({
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tagName: 'span',
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className: 'file-input',
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initialize: function() {
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this.$input = this.$el.find('input[type=file]');
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this.modal = new Whisper.ModalView({el: $('#file-modal')});
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this.thumb = new Whisper.AttachmentPreviewView();
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this.$el.addClass('file-input');
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},
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events: {
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'change': 'previewImages',
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'click .close': 'deleteFiles',
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'click .paperclip': 'open'
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},
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open: function() {
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this.$input.click();
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},
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addThumb: function(e) {
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this.thumb.src = e.target.result;
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this.$el.find('.paperclip').append(this.thumb.render().el);
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},
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previewImages: function() {
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this.clearForm();
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var files = this.$input.prop('files');
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for (var i = 0; i < files.length; i++) {
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var FR = new FileReader();
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if ((files[i].size/1024).toFixed(4) >= 420) {
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this.modal.open();
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this.deleteFiles();
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}
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else {
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FR.onload = this.addThumb.bind(this);
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FR.readAsDataURL(files[i]);
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}
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}
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},
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hasFiles: function() {
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var files = this.$input.prop('files');
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return files && files.length && files.length > 0;
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},
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getFiles: function() {
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var promises = [];
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var files = this.$input.prop('files');
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for (var i = 0; i < files.length; i++) {
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promises.push(readFile(files[i]));
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}
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this.clearForm();
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return Promise.all(promises);
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},
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readFile: function(file) {
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var contentType = file.type;
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return new Promise(function(resolve, reject) {
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var FR = new FileReader();
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FR.onload = function(e) {
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resolve({data: e.target.result, contentType: contentType});
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};
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FR.readAsArrayBuffer(file);
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});
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},
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clearForm: function() {
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this.thumb.remove();
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},
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deleteFiles: function(e) {
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if (e) { e.stopPropagation(); }
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this.clearForm();
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this.$input.wrap('<form>').parent('form').trigger('reset');
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this.$input.unwrap();
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}
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});
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})();
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