mirror of
https://github.com/silverstripe/silverstripe-reports
synced 2024-08-31 14:57:51 +02:00
225 lines
6.3 KiB
JavaScript
225 lines
6.3 KiB
JavaScript
/**
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* Convert a single file-input element into a 'multiple' input list
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*
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* Modified 2006-11-06 by Silverstripe Ltd.
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*
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* Usage:
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*
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* 1. Create a file input element (no name)
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* eg. <input type="file" id="first_file_element">
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*
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* 2. Create a DIV for the output to be written to
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* eg. <div id="files_list"></div>
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*
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* 3. Instantiate a MultiSelector object, passing in the DIV and an (optional) maximum number of files
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* eg. var multi_selector = new MultiSelector( document.getElementById( 'files_list' ), 3 );
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*
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* 4. Add the first element
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* eg. multi_selector.addElement( document.getElementById( 'first_file_element' ) );
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*
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* 5. That's it.
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*
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* You might (will) want to play around with the addListRow() method to make the output prettier.
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*
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* You might also want to change the line
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* element.name = 'file_' + this.count;
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* ...to a naming convention that makes more sense to you.
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*
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* Licence:
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* Use this however/wherever you like, just don't blame me if it breaks anything.
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*
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* Credit:
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* If you're nice, you'll leave this bit:
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*
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* Class by Stickman -- http://www.the-stickman.com
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* with thanks to:
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* [for Safari fixes]
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* Luis Torrefranca -- http://www.law.pitt.edu
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* and
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* Shawn Parker & John Pennypacker -- http://www.fuzzycoconut.com
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* [for duplicate name bug]
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* 'neal'
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*/
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// Modified by: Silverstripe Ltd. (changed naming of file-input-elements)
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function ObservableObject() {
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this.functions = [];
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}
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ObservableObject.prototype = {
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subscribe : function(evt, fn) {
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this.functions.push([evt, fn]);
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},
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unsubscribe : function(evt, fn) {
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this.functions = this.fns.filter(function(el) {if (el !== [evt, fn]) return el;});
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},
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fire : function(evt, data, scope) {
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scope = scope || window
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jQuery(this.functions).each(function(el) {
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if (el[0] == evt) el[1].call(scope, data);
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});
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}
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};
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var MultiSelectorObserver = new ObservableObject();
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function MultiSelector( list_target, max, upload_button ){
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this.upload_button = upload_button;
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this.upload_button.setAttribute("disabled", "disabled");
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// Where to write the list
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this.list_target = list_target;
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// How many elements?
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this.count = -1;
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// How many elements?
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this.id = 0;
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// Is there a maximum?
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if( max ){
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this.max = max;
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} else {
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this.max = -1;
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};
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/**
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* Add a new file input element
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*/
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this.addElement = function( element ){
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// Make sure it's a file input element
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if( element.tagName == 'INPUT' && element.type == 'file' ){
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// Element name -- what number am I?
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// Modified by: Silverstripe Ltd. (changed naming of file-input-elements)
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element.name = 'Files[' + this.id++ + ']'
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// If we've reached maximum number, disable input element
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if( this.max != -1 && this.count >= this.max ){
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element.disabled = true;
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};
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// File element counter
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this.count++;
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// Add reference to this object
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element.__scope = this;
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element.multi_selector = this;
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// What to do when a file is selected
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element.onchange = function(){
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// New file input
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var new_element = document.createElement( 'input' );
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new_element.type = 'file';
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// Add new element
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this.parentNode.insertBefore( new_element, this );
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// Apply 'update' to element
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this.multi_selector.addElement( new_element );
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// Update list
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this.multi_selector.addListRow( this );
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// Hide this: we can't use display:none because Safari doesn't like it
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this.style.position = 'absolute';
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this.style.left = '-1000px';
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element.__scope.toggleUploadButton();
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};
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// Most recent element
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this.current_element = element;
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} else {
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// This can only be applied to file input elements!
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alert( 'Error: not a file input element' );
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};
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};
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this.toggleUploadButton = function() {
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if(this.count > 0) {
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this.upload_button.removeAttribute("disabled");
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} else {
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this.upload_button.setAttribute("disabled", "disabled");
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}
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}
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/**
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* Add a new row to the list of files
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*/
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this.addListRow = function( element ){
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var fileId = this.id -1;
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// Modified 2006-11-06 by Silverstripe Ltd.
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var filenameMatches = element.value.match(/([^\/\\]+)$/);
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var filename = filenameMatches[1];
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// Row div
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var new_row = document.createElement('div');
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new_row.className = 'fileBox';
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// Delete button
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var new_row_button = document.createElement('input');
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new_row_button.type = 'button';
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new_row_button.value = 'Delete';
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new_row_button.setAttribute('class', 'delete');
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// References
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new_row.element = element;
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element.__scope = this,
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// Delete function
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new_row_button.onclick= function(){
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// Remove element from form
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this.parentNode.element.parentNode.removeChild( this.parentNode.element );
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// Remove this row from the list
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this.parentNode.parentNode.removeChild( this.parentNode );
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// Decrement counter
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this.parentNode.element.multi_selector.count--;
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// Re-enable input element (if it's disabled)
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this.parentNode.element.multi_selector.current_element.disabled = false;
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element.__scope.toggleUploadButton();
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// Appease Safari
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// without it Safari wants to reload the browser window
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// which nixes your already queued uploads
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return false;
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};
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// Set row value
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// Modified 2006-11-06 by Silverstripe Ltd.
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new_row.innerHTML = filename;
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MultiSelectorObserver.fire('onBeforeCreateRow', [fileId, new_row], this);
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// Add button
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new_row.appendChild( new_row_button );
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// Add it to the list
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this.list_target.appendChild( new_row );
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MultiSelectorObserver.fire('onAfterCreateRow', [fileId, new_row], this);
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// Modified 2006-11-06 by Silverstripe Ltd.
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if(typeof(window.ontabschanged) != 'undefined') window.ontabschanged();
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};
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};
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MultiSelectorObserver.subscribe('onBeforeCreateRow', function(data) {
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if (jQuery('#metadataFormTemplate').length) {
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var parameters = jQuery('#metadataFormTemplate').clone(true);
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parameters.get(0).id = '';
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parameters.find(":input[name!='']").each(function(i) { this.name = this.name.replace(/__X__/g, data[0]); });
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parameters.find(":input[id!='']").each(function(i) { this.id = this.id.replace(/__X__/g, data[0]); });
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data[1].innerHTML = data[1].innerHTML + '<div id="MetadataFor-'+data[0]+'">'+parameters.html()+'</div>';
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}
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}); |