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