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annotate src/plugins/dragdrop.js @ 47:16b61f228546 default tip

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minor
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 31 Oct 2022 10:41:24 -0600
parents ea32a44b5a6e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
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1 /**
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2 * SCEditor Drag and Drop Plugin
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3 * http://www.sceditor.com/
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4 *
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5 * Copyright (C) 2017, Sam Clarke (samclarke.com)
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6 *
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7 * SCEditor is licensed under the MIT license:
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8 * http://www.opensource.org/licenses/mit-license.php
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9 *
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10 * @author Sam Clarke
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11 */
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12 (function (sceditor) {
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13 'use strict';
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14
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15 /**
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16 * Place holder GIF shown while image is loading.
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17 * @type {string}
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18 * @private
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19 */
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20 var loadingGif = 'data:image/gif;base64,R0lGODlhlgBkAPABAH19ffb29iH5BAAK' +
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21 'AAAAIf4aQ3JlYXRlZCB3aXRoIGFqYXhsb2FkLmluZm8AIf8LTkVUU0NBUEUyLjADAQA' +
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22 'AACwAAAAAlgBkAAAC1YyPqcvtD6OctNqLs968+w+G4kiW5omm6sq27gvH8kzX9o3n+s' +
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39 'f0uv2OvwT2fP6iD7gAMEhICAeImIAYiFDoOPi22KcouZfw6BhZGUBZeYlp6LbJiTD6C' +
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40 'Qqg6Vm6eQqqKtkZ24iaKtrKunpQa9tmmju7Wwu7KFtMi3oYDMzompkHHS09TV1tfY2d' +
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41 'rb3N3e39DR4uPk5ebn6Onq6+zt7u/g4fLz9PX29/j5+vv8/f31QAADs=';
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42
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43 /**
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44 * Basic check for browser support
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45 * @type {boolean}
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46 * @private
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47 */
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48 var isSupported = typeof window.FileReader !== 'undefined';
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49 var base64DataUri = /data:[^;]+;base64,/i;
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50
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51 function base64DataUriToBlob(url) {
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52 // 5 is length of "data:" prefix
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53 var mime = url.substr(5, url.indexOf(';') - 5);
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54 var data = atob(url.substr(url.indexOf(',') + 1));
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55 /* global Uint8Array */
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56 var binary = new Uint8Array(data.length);
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57
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58 for (var i = 0; i < data.length; i++) {
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59 binary[i] = data[i].charCodeAt(0);
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60 }
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61
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62 try {
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63 return new Blob([binary], { type: mime });
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64 } catch (e) {
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65 return null;
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66 }
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67 }
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68
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69 sceditor.plugins.dragdrop = function () {
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70 if (!isSupported) {
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71 return;
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72 }
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73
29
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74 var base = {};
0
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75 var opts;
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76 var editor;
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77 var handleFile;
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78 var container;
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79 var cover;
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80 var placeholderId = 0;
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81
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82
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83 function hideCover() {
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84 cover.style.display = 'none';
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85 container.className = container.className.replace(/(^| )dnd( |$)/g, '');
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86 }
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87
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88 function showCover() {
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89 if (cover.style.display === 'none') {
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90 cover.style.display = 'block';
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91 container.className += ' dnd';
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92 }
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93 }
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94
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95 function isAllowed(file) {
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96 // FF sets type to application/x-moz-file until it has been dropped
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97 if (file.type !== 'application/x-moz-file' && opts.allowedTypes &&
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98 opts.allowedTypes.indexOf(file.type) < 0) {
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99 return false;
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100 }
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101
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102 return opts.isAllowed ? opts.isAllowed(file) : true;
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103 };
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104
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105 function createHolder(toReplace) {
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106 var placeholder = document.createElement('img');
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107 placeholder.src = loadingGif;
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108 placeholder.className = 'sceditor-ignore';
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109 placeholder.id = 'sce-dragdrop-' + placeholderId++;
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110
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111 function replace(html) {
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112 var node = editor
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113 .getBody()
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114 .ownerDocument
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115 .getElementById(placeholder.id);
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116
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117 if (node) {
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118 if (typeof html === 'string') {
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119 node.insertAdjacentHTML('afterend', html);
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120 }
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121
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122 node.parentNode.removeChild(node);
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123 }
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124 }
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125
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126 return function () {
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127 if (toReplace) {
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128 toReplace.parentNode.replaceChild(placeholder, toReplace);
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129 } else {
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130 editor.wysiwygEditorInsertHtml(placeholder.outerHTML);
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131 }
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132
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133 return {
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134 insert: function (html) {
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135 replace(html);
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136 },
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137 cancel: replace
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138 };
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139 };
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140 }
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141
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142 function handleDragOver(e) {
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143 var dt = e.dataTransfer;
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144 var files = dt.files.length || !dt.items ? dt.files : dt.items;
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145
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146 for (var i = 0; i < files.length; i++) {
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147 // Dragging a string should be left to default
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148 if (files[i].kind === 'string') {
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149 return;
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150 }
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151 }
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152
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153 showCover();
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154 e.preventDefault();
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155 }
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156
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157 function handleDrop(e) {
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158 var dt = e.dataTransfer;
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159 var files = dt.files.length || !dt.items ? dt.files : dt.items;
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160
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161 hideCover();
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162
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163 for (var i = 0; i < files.length; i++) {
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164 // Dragging a string should be left to default
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165 if (files[i].kind === 'string') {
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166 return;
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167 }
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168
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169 if (isAllowed(files[i])) {
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170 handleFile(files[i], createHolder());
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171 }
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172 }
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173
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174 e.preventDefault();
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175 }
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176
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177 base.signalReady = function (ed) {
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178 editor = ed;
0
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179 opts = editor.opts.dragdrop || {};
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180 handleFile = opts.handleFile;
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181
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182 container = editor.getContentAreaContainer().parentNode;
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183
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184 cover = container.appendChild(sceditor.dom.parseHTML(
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185 '<div class="sceditor-dnd-cover" style="display: none">' +
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186 '<p>' + editor._('Drop files here') + '</p>' +
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187 '</div>'
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188 ).firstChild);
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189
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190 container.addEventListener('dragover', handleDragOver);
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191 container.addEventListener('dragleave', hideCover);
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192 container.addEventListener('dragend', hideCover);
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193 container.addEventListener('drop', handleDrop);
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194
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195 editor.getBody().addEventListener('dragover', handleDragOver);
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196 editor.getBody().addEventListener('drop', hideCover);
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197 };
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198
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199 base.signalPasteHtml = function (paste) {
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200 if (!('handlePaste' in opts) || opts.handlePaste) {
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201 var div = document.createElement('div');
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202 div.innerHTML = paste.val;
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203
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204 var images = div.querySelectorAll('img');
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205 for (var i = 0; i < images.length; i++) {
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206 var image = images[i];
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207
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208 if (base64DataUri.test(image.src)) {
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209 var file = base64DataUriToBlob(image.src);
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210 if (file && isAllowed(file)) {
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211 handleFile(file, createHolder(image));
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212 } else {
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213 image.parentNode.removeChild(image);
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214 }
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215 }
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216 }
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217
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218 paste.val = div.innerHTML;
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219 }
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220 };
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221
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222 return base;
0
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223 };
4c4fc447baea start with sceditor-3.1.1
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224 })(sceditor);