silverstripe-framework/javascript/TreeSelectorField.js

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JavaScript
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/**
* TreeDropdownField.js
*/
TreeDropdownField = Class.extend('Observable');
TreeDropdownField.prototype = {
initialize: function() {
// Hook up all the fieldy bits
this.editLink = this.getElementsByTagName('a')[0];
this.humanItems = this.getElementsByTagName('span')[0];
this.inputTag = this.getElementsByTagName('input')[0];
this.editLink.treeDropdownField = this;
this.humanItems.treeDropdownField = this;
this.inputTag.treeDropdownField = this;
this.editLink.onclick = this.edit_click;
this.humanItems.onclick = this.edit_click;
this.inputTag.setValue = this.setValue.bind(this);
},
destroy: function() {
if(this.editLink) {
this.editLink.onclick = null;
this.editLink.treeDropdownField = null;
this.editLink = null;
}
if(this.humanItems) {
this.humanItems.onclick = null;
this.humanItems.treeDropdownField = null;
this.humanItems = null;
}
if(this.inputTag) {
this.inputTag.setValue = null;
this.inputTag.treeDropdownField = null;
this.inputTag = null;
}
},
getName: function() {
return this.inputTag.name;
},
refresh: function() {
this.createTreeNode();
this.ajaxGetTree( (function(response) {
this.newTreeReady(response, false);
this.updateTreeLabel();
}).bind(this));
},
helperURLBase: function() {
return this.ownerForm().action + '/field/' + this.getName() + '/';
},
ownerForm: function() {
var f =this.parentNode;
while(f && f.tagName.toLowerCase() != 'form') f = f.parentNode;
return f;
},
toggleTree: function() {
if(this.treeShown) this.hideTree();
else this.showTree();
},
createTreeNode: function(keepTreeHidden) {
if(!this.itemTree) {
this.itemTree = document.createElement('div');
if(keepTreeHidden) {
this.hideTree();
}
this.itemTree.className = 'tree_holder';
this.itemTree.innerHTML = ss.i18n._t('LOADING', 'Loading...');
this.appendChild(this.itemTree);
}
},
showTree: function () {
this.treeShown = true;
if(this.itemTree) {
this.itemTree.style.display = 'block';
// Store this in a parameter so that stopObserving works
this.bound_testForBlur = this.testForBlur.bind(this);
Event.observe(document, 'click', this.bound_testForBlur);
this.stretchIframeIfNeeded();
} else {
this.createTreeNode();
this.ajaxGetTree( (function(response) {
this.newTreeReady(response, false);
this.updateTreeLabel();
}).bind(this));
}
},
/**
* If this control is inside an iframe, stretch the iframe out to fit the tree.
*/
stretchIframeIfNeeded: function() {
if(parent && parent.document) {
if(!this.iframeObj) {
var iframes = parent.document.getElementsByTagName('iframe')
var i,item;
for(i=0;item=iframes[i];i++) {
if(item.contentWindow == window) {
this.iframeObj = item;
break;
}
}
}
// This iframe stretching doesn't work with the greybox
if(this.iframeObj && this.iframeObj.id == 'GB_frame') return;
var desiredHeight = Position.cumulativeOffset(this.itemTree)[1] + this.itemTree.offsetHeight + 2;
if(this.iframeObj && desiredHeight > this.iframeObj.offsetHeight) {
this.iframeObj.oldHeight = this.iframeObj.offsetHeight;
this.iframeObj.style.height = desiredHeight + 'px';
}
}
},
unstretchIframeIfNeeded: function() {
if(this.iframeObj && this.iframeObj.oldHeight)
this.iframeObj.style.height = this.iframeObj.oldHeight + 'px';
},
testForBlur: function (event) {
var clicked = Event.element(event);
if(clicked != this.itemTree && !hasAncestor(clicked, this.itemTree) && clicked != this.editLink && clicked != this.humanItems) {
this.hideTree();
}
},
hideTree: function() {
this.treeShown = false;
if(this.itemTree) {
this.itemTree.style.display = 'none';
if(this.bound_testForBlur) Event.stopObserving(document, 'click', this.bound_testForBlur);
// this.editLink.style.display = this.humanItems.style.display = 'block';
this.unstretchIframeIfNeeded();
}
// this.style.position = '';
},
ajaxGetTree: function(after) {
var ajaxURL = this.helperURLBase() + 'tree/';
ajaxURL += $('SecurityID') ? '&SecurityID=' + $('SecurityID').value : '';
if($('Form_EditForm_Locale')) ajaxURL += "&locale=" + $('Form_EditForm_Locale').value;
new Ajax.Request(ajaxURL, {
method : 'get',
onSuccess : after,
onFailure : function(response) { errorMessage("Error getting data", response); }
})
},
/**
* Called once the tree has been delivered from ajax
*/
newTreeReady: function (response, keepTreeHidden) {
// alert('newTreeReady');
this.itemTree.innerHTML = response.responseText;
// HACK IE6: see http://www.hedgerwow.com/360/bugs/css-select-free.html
this.itemTree.appendChild(document.createElement('iframe'));
this.tree = Tree.create(this.itemTree.getElementsByTagName('ul')[0], {
ajaxExpansion: this.ajaxExpansion,
getIdx: function() {
return this.getElementsByTagName('a')[0].getAttribute('rel');
},
idxBase : 'selector-' + this.getName() + '-',
dropdownField : this,
onselect : this.tree_click
});
// Select the appropriate items
var selectedItems = this.inputTag.value.split(/ *, */);
var i, isSelected = {};
for(i=0;i<selectedItems.length;i++) isSelected[selectedItems[i]] = true;
if(!keepTreeHidden) {
this.showTree();
}
},
/**
* Expander bound to each tree node
*/
ajaxExpansion: function() {
this.addNodeClass('loading');
var ul = this.treeNodeHolder();
ul.innerHTML = ss.i18n._t('LOADING', 'Loading...');
var ajaxURL = this.options.dropdownField.helperURLBase() + 'tree/' + this.getIdx();
ajaxURL += $('SecurityID') ? '&SecurityID=' + $('SecurityID').value : '';
if($('Form_EditForm_Locale')) ajaxURL += "&locale=" + $('Form_EditForm_Locale').value;
new Ajax.Request(ajaxURL, {
onSuccess : this.installSubtree.bind(this),
onFailure : function(response) { errorMessage('error loading subtree', response); }
});
},
setValue: function(val) {
this.inputTag = this.getElementsByTagName('input')[0];
if(this.inputTag.value != val) {
this.inputTag.value = val;
jQuery(this).trigger('ss.TreeDropdownField.change', {val: val});
this.notify('Change', val);
// If the tree item is already downloaded, just update the label
if($('selector-' + this.getName() + '-' + this.inputTag.value)) {
this.updateTreeLabel();
// Otherwise, update the tree with ajax
} else {
this.ajaxGetTree( (function(response) {
this.createTreeNode(true);
this.newTreeReady(response, true);
this.updateTreeLabel();
}).bind(this));
}
}
},
updateTreeLabel: function() {
var treeNode;
if(treeNode = $('selector-' + this.getName() + '-' + this.inputTag.value)) {
this.humanItems.innerHTML = treeNode.getTitle();
if(treeNode.tree.selected && treeNode.tree.selected.removeNodeClass) treeNode.tree.selected.removeNodeClass('current');
treeNode.addNodeClass('current');
this.tree.selected = treeNode;
} else {
this.humanItems.innerHTML = this.inputTag.value ? this.inputTag.value : '(Choose)';
}
},
setValueFromTree: function(treeID, title) {
this.humanItems.innerHTML = title;
this.inputTag.value = treeID.replace('selector-' + this.getName() + '-','');
jQuery(this).trigger('ss.TreeDropdownField.change', {val: this.inputTag.value});
this.notify('Change', this.inputTag.value);
this.hideTree();
},
edit_click : function() {
this.treeDropdownField.toggleTree();
return false;
},
tree_click : function() {
this.options.dropdownField.setValueFromTree(this.id, this.getTitle());
if(this.tree.selected && this.tree.selected.removeNodeClass) this.tree.selected.removeNodeClass('current');
this.addNodeClass('current');
this.tree.selected = this;
}
}
TreeMultiselectField = Class.extend('TreeDropdownField');
TreeMultiselectField.prototype = {
destroy: function() {
if(this.TreeDropdownField) this.TreeDropdownField.destroy();
this.TreeDropdownField = null;
},
newTreeReady: function (response) {
this.TreeDropdownField.newTreeReady(response);
MultiselectTree.create(this.tree);
this.tree.options.onselect = this.updateVal.bind(this);
// Select the appropriate items
var selectedItems = this.inputTag.value.split(/ *, */);
var i, isSelected = {};
for(i=0;i<selectedItems.length;i++) isSelected[selectedItems[i]] = true;
var allNodes = this.tree.getElementsByTagName('li');
for(i=0;i<allNodes.length;i++) {
if(isSelected[allNodes[i].getIdx()]) {
this.tree.selectNode(allNodes[i]);
}
}
},
hideTree: function() {
this.TreeDropdownField.hideTree();
if(this.tree) this.updateVal();
},
/**
* Update the inputTag and humanItems from the currently selected nodes.
*/
updateVal: function() {
var internalVal = humanVal = "";
for(i in this.tree.selectedNodes) {
internalVal += (internalVal?',':'') + i;
humanVal += (humanVal?', ':'') + this.tree.selectedNodes[i];
}
this.inputTag.value = internalVal;
this.humanItems.innerHTML = humanVal;
},
updateTreeLabel: function() {
var treeNode;
if(this.inputTag.value) {
var innerHTML = '';
var selectedItems = this.inputTag.value.split(/ *, */);
for(i=0;i<selectedItems.length;i++) {
if(treeNode = $('selector-' + this.getName() + '-' + selectedItems[i])) {
innerHTML += (innerHTML?', ':'') + treeNode.getTitle();
} else {
innerHTML += selectedItems[i];
}
}
this.humanItems.innerHTML = innerHTML;
} else {
this.humanItems.innerHTML = '(Choose)';
}
}
}
TreeMultiselectField.applyTo('div.TreeDropdownField.multiple');
TreeDropdownField.applyTo('div.TreeDropdownField.single');