cocoon/app/assets/javascripts/cocoon.js

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JavaScript
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(function($) {
var cocoon_element_counter = 0;
function replace_in_content(content, regexp_str, with_str) {
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reg_exp = new RegExp(regexp_str);
content.replace(reg_exp, with_str);
}
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$('.add_fields').live('click', function(e) {
e.preventDefault();
var $this = $(this),
assoc = $this.data('association'),
assocs = $this.data('associations'),
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content = $this.data('association-insertion-template'),
insertionMethod = $this.data('association-insertion-method') || $this.data('association-insertion-position') || 'before';
insertionNode = $this.data('association-insertion-node'),
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insertionTraversal = $this.data('association-insertion-traversal'),
regexp_braced = new RegExp('\\[new_' + assoc + '\\](.*?\\s)', 'g'),
regexp_underscord = new RegExp('_new_' + assoc + '_(\\w*)', 'g'),
new_id = new Date().getTime() + cocoon_element_counter++,
newcontent_braced = '[' + new_id + ']',
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newcontent_underscord = '_' + new_id + '_',
new_content = content.replace(regexp_braced, '[' + new_id + ']$1');
if (new_content == content) {
regexp_braced = new RegExp('\\[new_' + assocs + '\\](.*?\\s)', 'g');
regexp_underscord = new RegExp('_new_' + assocs + '_(\\w*)', 'g');
new_content = content.replace(regexp_braced, '[' + new_id + ']$1');
}
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new_content = new_content.replace(regexp_underscord, newcontent_underscord + "$1");
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if (insertionNode){
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if (insertionTraversal){
insertionNode = $this[insertionTraversal](insertionNode)
} else {
insertionNode = insertionNode == "this" ? $this : $(insertionNode);
}
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} else {
insertionNode = $this.parent();
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}
var contentNode = $(new_content);
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insertionNode.trigger('cocoon:before-insert', [contentNode]);
// allow any of the jquery dom manipulation methods (after, before, append, prepend, etc)
// to be called on the node. allows the insertion node to be the parent of the inserted
// code and doesn't force it to be a sibling like after/before does. default: 'before'
var addedContent = insertionNode[insertionMethod](contentNode);
insertionNode.trigger('cocoon:after-insert', [contentNode]);
});
$('.remove_fields.dynamic, .remove_fields.existing').live('click', function(e) {
var $this = $(this);
var node_to_delete = $this.closest(".nested-fields");
var trigger_node = node_to_delete.parent();
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e.preventDefault();
trigger_node.trigger('cocoon:before-remove', [node_to_delete]);
var timeout = trigger_node.data('remove-timeout') || 0;
setTimeout(function() {
if ($this.hasClass('dynamic')) {
$this.closest(".nested-fields").remove();
} else {
$this.prev("input[type=hidden]").val("1");
$this.closest(".nested-fields").hide();
}
trigger_node.trigger('cocoon:after-remove', [node_to_delete]);
}, timeout);
});
})(jQuery);