1 | /** |
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2 | * Convert a single file-input element into a 'multiple' input list |
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3 | * |
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4 | * Usage: |
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5 | * |
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6 | * 1. Create a file input element (no name) |
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7 | * eg. <input type="file" id="first_file_element"> |
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8 | * |
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9 | * 2. Create a DIV for the output to be written to |
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10 | * eg. <div id="files_list"></div> |
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11 | * |
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12 | * 3. Instantiate a MultiSelector object, passing in the DIV and an (optional) maximum number of files |
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13 | * eg. var multi_selector = new MultiSelector( document.getElementById( 'files_list' ), 3 ); |
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14 | * |
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15 | * 4. Add the first element |
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16 | * eg. multi_selector.addElement( document.getElementById( 'first_file_element' ) ); |
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17 | * |
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18 | * 5. That's it. |
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19 | * |
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20 | * You might (will) want to play around with the addListRow() method to make the output prettier. |
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21 | * |
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22 | * You might also want to change the line |
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23 | * element.name = 'file_' + this.count; |
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24 | * ...to a naming convention that makes more sense to you. |
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25 | * |
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26 | * Licence: |
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27 | * Use this however/wherever you like, just don't blame me if it breaks anything. |
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28 | * |
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29 | * Credit: |
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30 | * If you're nice, you'll leave this bit: |
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31 | * |
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32 | * Class by Stickman -- http://www.the-stickman.com |
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33 | * with thanks to: |
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34 | * [for Safari fixes] |
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35 | * Luis Torrefranca -- http://www.law.pitt.edu |
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36 | * and |
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37 | * Shawn Parker & John Pennypacker -- http://www.fuzzycoconut.com |
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38 | * [for duplicate name bug] |
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39 | * 'neal' |
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40 | * Modified by: Sidnei Augusto Drovetto Junior |
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41 | */ |
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42 | function MultiSelector( list_target, max ) |
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43 | { |
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44 | |
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45 | // Where to write the list |
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46 | this.list_target = list_target; |
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47 | // How many elements? |
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48 | this.count = 0; |
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49 | // How many elements? |
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50 | this.id = 0; |
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51 | // Is there a maximum? |
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52 | if( max ) |
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53 | this.max = max; |
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54 | else |
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55 | this.max = -1; |
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56 | |
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57 | /** |
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58 | * Add a new file input element |
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59 | */ |
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60 | this.addElement = function(element, name) |
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61 | { |
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62 | // Make sure it's a file input element |
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63 | if( element.tagName == 'INPUT' && element.type == 'file' ) |
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64 | { |
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65 | // Element name -- what number am I? |
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66 | //element.name = 'file_' + this.id++; |
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67 | this.id++; |
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68 | element.name = name; |
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69 | |
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70 | // Add reference to this object |
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71 | element.multi_selector = this; |
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72 | |
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73 | // What to do when a file is selected |
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74 | element.onchange = function() |
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75 | { |
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76 | // New file input |
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77 | var new_element = document.createElement( 'input' ); |
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78 | new_element.type = 'file'; |
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79 | |
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80 | // Add new element |
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81 | this.parentNode.insertBefore( new_element, this ); |
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82 | |
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83 | // Apply 'update' to element |
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84 | this.multi_selector.addElement(new_element, name); |
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85 | |
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86 | // Update list |
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87 | this.multi_selector.addListRow( this ); |
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88 | |
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89 | // Hide this: we can't use display:none because Safari doesn't like it |
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90 | this.style.position = 'absolute'; |
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91 | this.style.left = '-1000px'; |
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92 | |
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93 | }; |
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94 | // If we've reached maximum number, disable input element |
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95 | if( this.max != -1 && this.count >= this.max ) |
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96 | { |
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97 | element.disabled = true; |
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98 | }; |
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99 | |
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100 | // File element counter |
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101 | this.count++; |
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102 | // Most recent element |
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103 | this.current_element = element; |
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104 | |
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105 | } |
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106 | else |
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107 | { |
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108 | // This can only be applied to file input elements! |
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109 | alert( 'Erro: não é um input de arquivo' ); |
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110 | }; |
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111 | |
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112 | }; |
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113 | |
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114 | /** |
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115 | * Add a new row to the list of files |
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116 | */ |
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117 | this.addListRow = function( element ) |
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118 | { |
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119 | // Row div |
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120 | var new_row = document.createElement( 'div' ); |
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121 | |
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122 | // Delete button |
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123 | var new_row_button = document.createElement( 'a' ); |
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124 | new_row_button.href = '#'; |
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125 | new_row_button.innerHTML = 'remover'; |
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126 | |
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127 | // References |
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128 | new_row.element = element; |
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129 | |
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130 | // Delete function |
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131 | new_row_button.onclick= function() |
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132 | { |
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133 | // Remove element from form |
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134 | this.parentNode.element.parentNode.removeChild( this.parentNode.element ); |
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135 | |
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136 | // Remove this row from the list |
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137 | this.parentNode.parentNode.removeChild( this.parentNode ); |
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138 | |
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139 | // Decrement counter |
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140 | this.parentNode.element.multi_selector.count--; |
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141 | |
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142 | // Re-enable input element (if it's disabled) |
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143 | this.parentNode.element.multi_selector.current_element.disabled = false; |
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144 | |
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145 | // Appease Safari |
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146 | // without it Safari wants to reload the browser window |
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147 | // which nixes your already queued uploads |
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148 | return false; |
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149 | }; |
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150 | |
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151 | |
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152 | |
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153 | // Set row value |
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154 | new_row.innerHTML = element.value + ' '; |
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155 | |
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156 | // Add button |
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157 | new_row.appendChild( new_row_button ); |
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158 | |
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159 | // Add it to the list |
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160 | this.list_target.appendChild( new_row ); |
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161 | |
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162 | }; |
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163 | |
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164 | this.removeFile = function (me, nome){ |
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165 | me.parentNode.parentNode.removeChild(me.parentNode); |
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166 | hd = document.getElementById("hd_remover_anexos"); |
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167 | hd.value += nome+"; "; |
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168 | } |
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169 | |
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170 | }; |
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