[903] | 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 | // Set row value |
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| 152 | new_row.innerHTML = element.value + ' '; |
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| 153 | |
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| 154 | // Add button |
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| 155 | new_row.appendChild( new_row_button ); |
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| 156 | |
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| 157 | // Add it to the list |
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| 158 | this.list_target.appendChild( new_row ); |
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| 159 | |
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| 160 | }; |
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| 161 | |
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| 162 | }; |
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