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Additional ArrayContainer helper methods

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This commit is contained in:
Patrick Steele-Idem 2016-02-04 16:20:26 -07:00
parent c1c56929e9
commit ad81118430
1 changed files with 40 additions and 0 deletions
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40
compiler/ast/ArrayContainer.js
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@ -46,12 +46,52 @@ class ArrayContainer extends Container {
child.container = null;
}
prependChild(newChild) {
ok(newChild, 'Invalid child');
this.array.unshift(newChild);
newChild.container = this;
}
appendChild(newChild) {
ok(newChild, 'Invalid child');
this.array.push(newChild);
newChild.container = this;
}
insertChildBefore(newChild, referenceNode) {
ok(newChild, 'Invalid child');
ok(referenceNode, 'Invalid reference child');
var array = this.array;
var len = array.length;
for (var i=0; i<len; i++) {
var curChild = array[i];
if (curChild === referenceNode) {
array.splice(i, 0, newChild);
return;
}
}
throw new Error('Reference node not found');
}
insertChildAfter(newChild, referenceNode) {
ok(newChild, 'Invalid child');
ok(referenceNode, 'Invalid reference child');
var array = this.array;
var len = array.length;
for (var i=0; i<len; i++) {
var curChild = array[i];
if (curChild === referenceNode) {
array.splice(i+1, 0, newChild);
return;
}
}
throw new Error('Reference node not found');
}
forEachNextSibling(node, callback, thisObj) {
if (node.container !== this) {
throw new Error('Node does not belong to container: ' + node);