Added vulcanize under third_party/npm_modules

node_modules/vulcanize/node_modules/whacko/node_modules/parse5/lib/tree_construction/open_element_stack.js

Index: node_modules/vulcanize/node_modules/whacko/node_modules/parse5/lib/tree_construction/open_element_stack.js
diff --git a/node_modules/vulcanize/node_modules/whacko/node_modules/parse5/lib/tree_construction/open_element_stack.js b/node_modules/vulcanize/node_modules/whacko/node_modules/parse5/lib/tree_construction/open_element_stack.js
new file mode 100644
index 0000000000000000000000000000000000000000..60ce52837d350e6163e97e3b79c8e5170a6123a2
--- /dev/null
+++ b/node_modules/vulcanize/node_modules/whacko/node_modules/parse5/lib/tree_construction/open_element_stack.js
@@ -0,0 +1,379 @@
+'use strict';
+
+var HTML = require('../common/html');
+
+//Aliases
+var $ = HTML.TAG_NAMES,
+    NS = HTML.NAMESPACES;
+
+//Element utils
+
+//OPTIMIZATION: Integer comparisons are low-cost, so we can use very fast tag name length filters here.
+//It's faster than using dictionary.
+function isImpliedEndTagRequired(tn) {
+    switch (tn.length) {
+        case 1:
+            return tn === $.P;
+
+        case 2:
+            return tn === $.RP || tn === $.RT || tn === $.DD || tn === $.DT || tn === $.LI;
+
+        case 6:
+            return tn === $.OPTION;
+
+        case 8:
+            return tn === $.OPTGROUP;
+    }
+
+    return false;
+}
+
+function isScopingElement(tn, ns) {
+    switch (tn.length) {
+        case 2:
+            if (tn === $.TD || tn === $.TH)
+                return ns === NS.HTML;
+
+            else if (tn === $.MI || tn === $.MO || tn == $.MN || tn === $.MS)
+                return ns === NS.MATHML;
+
+            break;
+
+        case 4:
+            if (tn === $.HTML)
+                return ns === NS.HTML;
+
+            else if (tn === $.DESC)
+                return ns === NS.SVG;
+
+            break;
+
+        case 5:
+            if (tn === $.TABLE)
+                return ns === NS.HTML;
+
+            else if (tn === $.MTEXT)
+                return ns === NS.MATHML;
+
+            else if (tn === $.TITLE)
+                return ns === NS.SVG;
+
+            break;
+
+        case 6:
+            return (tn === $.APPLET || tn === $.OBJECT) && ns === NS.HTML;
+
+        case 7:
+            return (tn === $.CAPTION || tn === $.MARQUEE) && ns === NS.HTML;
+
+        case 8:
+            return tn === $.TEMPLATE && ns === NS.HTML;
+
+        case 13:
+            return tn === $.FOREIGN_OBJECT && ns === NS.SVG;
+
+        case 14:
+            return tn === $.ANNOTATION_XML && ns === NS.MATHML;
+    }
+
+    return false;
+}
+
+//Stack of open elements
+var OpenElementStack = module.exports = function (document, treeAdapter) {
+    this.stackTop = -1;
+    this.items = [];
+    this.current = document;
+    this.currentTagName = null;
+    this.currentTmplContent = null;
+    this.tmplCount = 0;
+    this.treeAdapter = treeAdapter;
+};
+
+//Index of element
+OpenElementStack.prototype._indexOf = function (element) {
+    var idx = -1;
+
+    for (var i = this.stackTop; i >= 0; i--) {
+        if (this.items[i] === element) {
+            idx = i;
+            break;
+        }
+    }
+    return idx;
+};
+
+//Update current element
+OpenElementStack.prototype._isInTemplate = function () {
+    if (this.currentTagName !== $.TEMPLATE)
+        return false;
+
+    return this.treeAdapter.getNamespaceURI(this.current) === NS.HTML;
+};
+
+OpenElementStack.prototype._updateCurrentElement = function () {
+    this.current = this.items[this.stackTop];
+    this.currentTagName = this.current && this.treeAdapter.getTagName(this.current);
+
+    this.currentTmplContent = this._isInTemplate() ? this.treeAdapter.getChildNodes(this.current)[0] : null;
+};
+
+//Mutations
+OpenElementStack.prototype.push = function (element) {
+    this.items[++this.stackTop] = element;
+    this._updateCurrentElement();
+
+    if (this._isInTemplate())
+        this.tmplCount++;
+
+};
+
+OpenElementStack.prototype.pop = function () {
+    this.stackTop--;
+
+    if (this.tmplCount > 0 && this._isInTemplate())
+        this.tmplCount--;
+
+    this._updateCurrentElement();
+};
+
+OpenElementStack.prototype.replace = function (oldElement, newElement) {
+    var idx = this._indexOf(oldElement);
+    this.items[idx] = newElement;
+
+    if (idx === this.stackTop)
+        this._updateCurrentElement();
+};
+
+OpenElementStack.prototype.insertAfter = function (referenceElement, newElement) {
+    var insertionIdx = this._indexOf(referenceElement) + 1;
+
+    this.items.splice(insertionIdx, 0, newElement);
+
+    if (insertionIdx == ++this.stackTop)
+        this._updateCurrentElement();
+};
+
+OpenElementStack.prototype.popUntilTagNamePopped = function (tagName) {
+    while (this.stackTop > -1) {
+        var tn = this.currentTagName;
+
+        this.pop();
+
+        if (tn === tagName)
+            break;
+    }
+};
+
+OpenElementStack.prototype.popUntilTemplatePopped = function () {
+    while (this.stackTop > -1) {
+        var tn = this.currentTagName,
+            ns = this.treeAdapter.getNamespaceURI(this.current);
+
+        this.pop();
+
+        if (tn === $.TEMPLATE && ns === NS.HTML)
+            break;
+    }
+};
+
+OpenElementStack.prototype.popUntilElementPopped = function (element) {
+    while (this.stackTop > -1) {
+        var poppedElement = this.current;
+
+        this.pop();
+
+        if (poppedElement === element)
+            break;
+    }
+};
+
+OpenElementStack.prototype.popUntilNumberedHeaderPopped = function () {
+    while (this.stackTop > -1) {
+        var tn = this.currentTagName;
+
+        this.pop();
+
+        if (tn === $.H1 || tn === $.H2 || tn === $.H3 || tn === $.H4 || tn === $.H5 || tn === $.H6)
+            break;
+    }
+};
+
+OpenElementStack.prototype.popAllUpToHtmlElement = function () {
+    //NOTE: here we assume that root <html> element is always first in the open element stack, so
+    //we perform this fast stack clean up.
+    this.stackTop = 0;
+    this._updateCurrentElement();
+};
+
+OpenElementStack.prototype.clearBackToTableContext = function () {
+    while (this.currentTagName !== $.TABLE && this.currentTagName !== $.TEMPLATE && this.currentTagName !== $.HTML)
+        this.pop();
+};
+
+OpenElementStack.prototype.clearBackToTableBodyContext = function () {
+    while (this.currentTagName !== $.TBODY && this.currentTagName !== $.TFOOT &&
+           this.currentTagName !== $.THEAD && this.currentTagName !== $.TEMPLATE &&
+           this.currentTagName !== $.HTML) {
+        this.pop();
+    }
+};
+
+OpenElementStack.prototype.clearBackToTableRowContext = function () {
+    while (this.currentTagName !== $.TR && this.currentTagName !== $.TEMPLATE && this.currentTagName !== $.HTML)
+        this.pop();
+};
+
+OpenElementStack.prototype.remove = function (element) {
+    for (var i = this.stackTop; i >= 0; i--) {
+        if (this.items[i] === element) {
+            this.items.splice(i, 1);
+            this.stackTop--;
+            this._updateCurrentElement();
+            break;
+        }
+    }
+};
+
+//Search
+OpenElementStack.prototype.tryPeekProperlyNestedBodyElement = function () {
+    //Properly nested <body> element (should be second element in stack).
+    var element = this.items[1];
+    return element && this.treeAdapter.getTagName(element) === $.BODY ? element : null;
+};
+
+OpenElementStack.prototype.contains = function (element) {
+    return this._indexOf(element) > -1;
+};
+
+OpenElementStack.prototype.getCommonAncestor = function (element) {
+    var elementIdx = this._indexOf(element);
+
+    return --elementIdx >= 0 ? this.items[elementIdx] : null;
+};
+
+OpenElementStack.prototype.isRootHtmlElementCurrent = function () {
+    return this.stackTop === 0 && this.currentTagName === $.HTML;
+};
+
+//Element in scope
+OpenElementStack.prototype.hasInScope = function (tagName) {
+    for (var i = this.stackTop; i >= 0; i--) {
+        var tn = this.treeAdapter.getTagName(this.items[i]);
+
+        if (tn === tagName)
+            return true;
+
+        var ns = this.treeAdapter.getNamespaceURI(this.items[i]);
+
+        if (isScopingElement(tn, ns))
+            return false;
+    }
+
+    return true;
+};
+
+OpenElementStack.prototype.hasNumberedHeaderInScope = function () {
+    for (var i = this.stackTop; i >= 0; i--) {
+        var tn = this.treeAdapter.getTagName(this.items[i]);
+
+        if (tn === $.H1 || tn === $.H2 || tn === $.H3 || tn === $.H4 || tn === $.H5 || tn === $.H6)
+            return true;
+
+        if (isScopingElement(tn, this.treeAdapter.getNamespaceURI(this.items[i])))
+            return false;
+    }
+
+    return true;
+};
+
+OpenElementStack.prototype.hasInListItemScope = function (tagName) {
+    for (var i = this.stackTop; i >= 0; i--) {
+        var tn = this.treeAdapter.getTagName(this.items[i]);
+
+        if (tn === tagName)
+            return true;
+
+        var ns = this.treeAdapter.getNamespaceURI(this.items[i]);
+
+        if (((tn === $.UL || tn === $.OL) && ns === NS.HTML) || isScopingElement(tn, ns))
+            return false;
+    }
+
+    return true;
+};
+
+OpenElementStack.prototype.hasInButtonScope = function (tagName) {
+    for (var i = this.stackTop; i >= 0; i--) {
+        var tn = this.treeAdapter.getTagName(this.items[i]);
+
+        if (tn === tagName)
+            return true;
+
+        var ns = this.treeAdapter.getNamespaceURI(this.items[i]);
+
+        if ((tn === $.BUTTON && ns === NS.HTML) || isScopingElement(tn, ns))
+            return false;
+    }
+
+    return true;
+};
+
+OpenElementStack.prototype.hasInTableScope = function (tagName) {
+    for (var i = this.stackTop; i >= 0; i--) {
+        var tn = this.treeAdapter.getTagName(this.items[i]);
+
+        if (tn === tagName)
+            return true;
+
+        var ns = this.treeAdapter.getNamespaceURI(this.items[i]);
+
+        if ((tn === $.TABLE || tn === $.TEMPLATE || tn === $.HTML) && ns === NS.HTML)
+            return false;
+    }
+
+    return true;
+};
+
+OpenElementStack.prototype.hasTableBodyContextInTableScope = function () {
+    for (var i = this.stackTop; i >= 0; i--) {
+        var tn = this.treeAdapter.getTagName(this.items[i]);
+
+        if (tn === $.TBODY || tn === $.THEAD || tn === $.TFOOT)
+            return true;
+
+        var ns = this.treeAdapter.getNamespaceURI(this.items[i]);
+
+        if ((tn === $.TABLE || tn === $.HTML) && ns === NS.HTML)
+            return false;
+    }
+
+    return true;
+};
+
+OpenElementStack.prototype.hasInSelectScope = function (tagName) {
+    for (var i = this.stackTop; i >= 0; i--) {
+        var tn = this.treeAdapter.getTagName(this.items[i]);
+
+        if (tn === tagName)
+            return true;
+
+        var ns = this.treeAdapter.getNamespaceURI(this.items[i]);
+
+        if (tn !== $.OPTION && tn !== $.OPTGROUP && ns === NS.HTML)
+            return false;
+    }
+
+    return true;
+};
+
+//Implied end tags
+OpenElementStack.prototype.generateImpliedEndTags = function () {
+    while (isImpliedEndTagRequired(this.currentTagName))
+        this.pop();
+};
+
+OpenElementStack.prototype.generateImpliedEndTagsWithExclusion = function (exclusionTagName) {
+    while (isImpliedEndTagRequired(this.currentTagName) && this.currentTagName !== exclusionTagName)
+        this.pop();
+};