Update

1 files changed, 482 insertions, 0 deletions

diff --git a/alarm/node_modules/parse5/lib/parser/open-element-stack.js b/alarm/node_modules/parse5/lib/parser/open-element-stack.js
new file mode 100644
index 0000000..c10880a
--- /dev/null
+++ b/alarm/node_modules/parse5/lib/parser/open-element-stack.js
@@ -0,0 +1,482 @@
+'use strict';
+
+const HTML = require('../common/html');
+
+//Aliases
+const $ = HTML.TAG_NAMES;
+const 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 === $.RB || tn === $.RP || tn === $.RT || tn === $.DD || tn === $.DT || tn === $.LI;
+
+        case 3:
+            return tn === $.RTC;
+
+        case 6:
+            return tn === $.OPTION;
+
+        case 8:
+            return tn === $.OPTGROUP;
+    }
+
+    return false;
+}
+
+function isImpliedEndTagRequiredThoroughly(tn) {
+    switch (tn.length) {
+        case 1:
+            return tn === $.P;
+
+        case 2:
+            return (
+                tn === $.RB ||
+                tn === $.RP ||
+                tn === $.RT ||
+                tn === $.DD ||
+                tn === $.DT ||
+                tn === $.LI ||
+                tn === $.TD ||
+                tn === $.TH ||
+                tn === $.TR
+            );
+
+        case 3:
+            return tn === $.RTC;
+
+        case 5:
+            return tn === $.TBODY || tn === $.TFOOT || tn === $.THEAD;
+
+        case 6:
+            return tn === $.OPTION;
+
+        case 7:
+            return tn === $.CAPTION;
+
+        case 8:
+            return tn === $.OPTGROUP || tn === $.COLGROUP;
+    }
+
+    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
+class OpenElementStack {
+    constructor(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
+    _indexOf(element) {
+        let idx = -1;
+
+        for (let i = this.stackTop; i >= 0; i--) {
+            if (this.items[i] === element) {
+                idx = i;
+                break;
+            }
+        }
+        return idx;
+    }
+
+    //Update current element
+    _isInTemplate() {
+        return this.currentTagName === $.TEMPLATE && this.treeAdapter.getNamespaceURI(this.current) === NS.HTML;
+    }
+
+    _updateCurrentElement() {
+        this.current = this.items[this.stackTop];
+        this.currentTagName = this.current && this.treeAdapter.getTagName(this.current);
+
+        this.currentTmplContent = this._isInTemplate() ? this.treeAdapter.getTemplateContent(this.current) : null;
+    }
+
+    //Mutations
+    push(element) {
+        this.items[++this.stackTop] = element;
+        this._updateCurrentElement();
+
+        if (this._isInTemplate()) {
+            this.tmplCount++;
+        }
+    }
+
+    pop() {
+        this.stackTop--;
+
+        if (this.tmplCount > 0 && this._isInTemplate()) {
+            this.tmplCount--;
+        }
+
+        this._updateCurrentElement();
+    }
+
+    replace(oldElement, newElement) {
+        const idx = this._indexOf(oldElement);
+
+        this.items[idx] = newElement;
+
+        if (idx === this.stackTop) {
+            this._updateCurrentElement();
+        }
+    }
+
+    insertAfter(referenceElement, newElement) {
+        const insertionIdx = this._indexOf(referenceElement) + 1;
+
+        this.items.splice(insertionIdx, 0, newElement);
+
+        if (insertionIdx === ++this.stackTop) {
+            this._updateCurrentElement();
+        }
+    }
+
+    popUntilTagNamePopped(tagName) {
+        while (this.stackTop > -1) {
+            const tn = this.currentTagName;
+            const ns = this.treeAdapter.getNamespaceURI(this.current);
+
+            this.pop();
+
+            if (tn === tagName && ns === NS.HTML) {
+                break;
+            }
+        }
+    }
+
+    popUntilElementPopped(element) {
+        while (this.stackTop > -1) {
+            const poppedElement = this.current;
+
+            this.pop();
+
+            if (poppedElement === element) {
+                break;
+            }
+        }
+    }
+
+    popUntilNumberedHeaderPopped() {
+        while (this.stackTop > -1) {
+            const tn = this.currentTagName;
+            const ns = this.treeAdapter.getNamespaceURI(this.current);
+
+            this.pop();
+
+            if (
+                tn === $.H1 ||
+                tn === $.H2 ||
+                tn === $.H3 ||
+                tn === $.H4 ||
+                tn === $.H5 ||
+                (tn === $.H6 && ns === NS.HTML)
+            ) {
+                break;
+            }
+        }
+    }
+
+    popUntilTableCellPopped() {
+        while (this.stackTop > -1) {
+            const tn = this.currentTagName;
+            const ns = this.treeAdapter.getNamespaceURI(this.current);
+
+            this.pop();
+
+            if (tn === $.TD || (tn === $.TH && ns === NS.HTML)) {
+                break;
+            }
+        }
+    }
+
+    popAllUpToHtmlElement() {
+        //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();
+    }
+
+    clearBackToTableContext() {
+        while (
+            (this.currentTagName !== $.TABLE && this.currentTagName !== $.TEMPLATE && this.currentTagName !== $.HTML) ||
+            this.treeAdapter.getNamespaceURI(this.current) !== NS.HTML
+        ) {
+            this.pop();
+        }
+    }
+
+    clearBackToTableBodyContext() {
+        while (
+            (this.currentTagName !== $.TBODY &&
+                this.currentTagName !== $.TFOOT &&
+                this.currentTagName !== $.THEAD &&
+                this.currentTagName !== $.TEMPLATE &&
+                this.currentTagName !== $.HTML) ||
+            this.treeAdapter.getNamespaceURI(this.current) !== NS.HTML
+        ) {
+            this.pop();
+        }
+    }
+
+    clearBackToTableRowContext() {
+        while (
+            (this.currentTagName !== $.TR && this.currentTagName !== $.TEMPLATE && this.currentTagName !== $.HTML) ||
+            this.treeAdapter.getNamespaceURI(this.current) !== NS.HTML
+        ) {
+            this.pop();
+        }
+    }
+
+    remove(element) {
+        for (let i = this.stackTop; i >= 0; i--) {
+            if (this.items[i] === element) {
+                this.items.splice(i, 1);
+                this.stackTop--;
+                this._updateCurrentElement();
+                break;
+            }
+        }
+    }
+
+    //Search
+    tryPeekProperlyNestedBodyElement() {
+        //Properly nested <body> element (should be second element in stack).
+        const element = this.items[1];
+
+        return element && this.treeAdapter.getTagName(element) === $.BODY ? element : null;
+    }
+
+    contains(element) {
+        return this._indexOf(element) > -1;
+    }
+
+    getCommonAncestor(element) {
+        let elementIdx = this._indexOf(element);
+
+        return --elementIdx >= 0 ? this.items[elementIdx] : null;
+    }
+
+    isRootHtmlElementCurrent() {
+        return this.stackTop === 0 && this.currentTagName === $.HTML;
+    }
+
+    //Element in scope
+    hasInScope(tagName) {
+        for (let i = this.stackTop; i >= 0; i--) {
+            const tn = this.treeAdapter.getTagName(this.items[i]);
+            const ns = this.treeAdapter.getNamespaceURI(this.items[i]);
+
+            if (tn === tagName && ns === NS.HTML) {
+                return true;
+            }
+
+            if (isScopingElement(tn, ns)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    hasNumberedHeaderInScope() {
+        for (let i = this.stackTop; i >= 0; i--) {
+            const tn = this.treeAdapter.getTagName(this.items[i]);
+            const ns = this.treeAdapter.getNamespaceURI(this.items[i]);
+
+            if (
+                (tn === $.H1 || tn === $.H2 || tn === $.H3 || tn === $.H4 || tn === $.H5 || tn === $.H6) &&
+                ns === NS.HTML
+            ) {
+                return true;
+            }
+
+            if (isScopingElement(tn, ns)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    hasInListItemScope(tagName) {
+        for (let i = this.stackTop; i >= 0; i--) {
+            const tn = this.treeAdapter.getTagName(this.items[i]);
+            const ns = this.treeAdapter.getNamespaceURI(this.items[i]);
+
+            if (tn === tagName && ns === NS.HTML) {
+                return true;
+            }
+
+            if (((tn === $.UL || tn === $.OL) && ns === NS.HTML) || isScopingElement(tn, ns)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    hasInButtonScope(tagName) {
+        for (let i = this.stackTop; i >= 0; i--) {
+            const tn = this.treeAdapter.getTagName(this.items[i]);
+            const ns = this.treeAdapter.getNamespaceURI(this.items[i]);
+
+            if (tn === tagName && ns === NS.HTML) {
+                return true;
+            }
+
+            if ((tn === $.BUTTON && ns === NS.HTML) || isScopingElement(tn, ns)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    hasInTableScope(tagName) {
+        for (let i = this.stackTop; i >= 0; i--) {
+            const tn = this.treeAdapter.getTagName(this.items[i]);
+            const ns = this.treeAdapter.getNamespaceURI(this.items[i]);
+
+            if (ns !== NS.HTML) {
+                continue;
+            }
+
+            if (tn === tagName) {
+                return true;
+            }
+
+            if (tn === $.TABLE || tn === $.TEMPLATE || tn === $.HTML) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    hasTableBodyContextInTableScope() {
+        for (let i = this.stackTop; i >= 0; i--) {
+            const tn = this.treeAdapter.getTagName(this.items[i]);
+            const ns = this.treeAdapter.getNamespaceURI(this.items[i]);
+
+            if (ns !== NS.HTML) {
+                continue;
+            }
+
+            if (tn === $.TBODY || tn === $.THEAD || tn === $.TFOOT) {
+                return true;
+            }
+
+            if (tn === $.TABLE || tn === $.HTML) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    hasInSelectScope(tagName) {
+        for (let i = this.stackTop; i >= 0; i--) {
+            const tn = this.treeAdapter.getTagName(this.items[i]);
+            const ns = this.treeAdapter.getNamespaceURI(this.items[i]);
+
+            if (ns !== NS.HTML) {
+                continue;
+            }
+
+            if (tn === tagName) {
+                return true;
+            }
+
+            if (tn !== $.OPTION && tn !== $.OPTGROUP) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    //Implied end tags
+    generateImpliedEndTags() {
+        while (isImpliedEndTagRequired(this.currentTagName)) {
+            this.pop();
+        }
+    }
+
+    generateImpliedEndTagsThoroughly() {
+        while (isImpliedEndTagRequiredThoroughly(this.currentTagName)) {
+            this.pop();
+        }
+    }
+
+    generateImpliedEndTagsWithExclusion(exclusionTagName) {
+        while (isImpliedEndTagRequired(this.currentTagName) && this.currentTagName !== exclusionTagName) {
+            this.pop();
+        }
+    }
+}
+
+module.exports = OpenElementStack;