'use strict';
var OpenElementStack = require('../parser/open_element_stack'),
Tokenizer = require('../tokenizer'),
HTML = require('../common/html');
//Aliases
var $ = HTML.TAG_NAMES;
function setEndLocation(element, closingToken, treeAdapter) {
var loc = element.__location;
if (!loc)
return;
/**
* @typedef {Object} ElementLocationInfo
* @extends StartTagLocationInfo
*
* @property {StartTagLocationInfo} startTag - Element's start tag location info.
* @property {LocationInfo} endTag - Element's end tag location info.
*/
if (!loc.startTag) {
loc.startTag = {
line: loc.line,
col: loc.col,
startOffset: loc.startOffset,
endOffset: loc.endOffset
};
if (loc.attrs)
loc.startTag.attrs = loc.attrs;
}
if (closingToken.location) {
var ctLocation = closingToken.location,
tn = treeAdapter.getTagName(element),
// NOTE: For cases like
- First 'p' closes without a closing tag and
// for cases like | - 'p' closes without a closing tag
isClosingEndTag = closingToken.type === Tokenizer.END_TAG_TOKEN &&
tn === closingToken.tagName;
if (isClosingEndTag) {
loc.endTag = {
line: ctLocation.line,
col: ctLocation.col,
startOffset: ctLocation.startOffset,
endOffset: ctLocation.endOffset
};
}
if (isClosingEndTag)
loc.endOffset = ctLocation.endOffset;
else
loc.endOffset = ctLocation.startOffset;
}
}
exports.assign = function (parser) {
//NOTE: obtain Parser proto this way to avoid module circular references
var parserProto = Object.getPrototypeOf(parser),
treeAdapter = parser.treeAdapter,
attachableElementLocation = null,
lastFosterParentingLocation = null,
currentToken = null;
//NOTE: patch _bootstrap method
parser._bootstrap = function (document, fragmentContext) {
parserProto._bootstrap.call(this, document, fragmentContext);
attachableElementLocation = null;
lastFosterParentingLocation = null;
currentToken = null;
//OpenElementStack
parser.openElements.pop = function () {
setEndLocation(this.current, currentToken, treeAdapter);
OpenElementStack.prototype.pop.call(this);
};
parser.openElements.popAllUpToHtmlElement = function () {
for (var i = this.stackTop; i > 0; i--)
setEndLocation(this.items[i], currentToken, treeAdapter);
OpenElementStack.prototype.popAllUpToHtmlElement.call(this);
};
parser.openElements.remove = function (element) {
setEndLocation(element, currentToken, treeAdapter);
OpenElementStack.prototype.remove.call(this, element);
};
};
//Token processing
parser._processTokenInForeignContent = function (token) {
currentToken = token;
parserProto._processTokenInForeignContent.call(this, token);
};
parser._processToken = function (token) {
currentToken = token;
parserProto._processToken.call(this, token);
//NOTE: and are never popped from the stack, so we need to updated
//their end location explicitly.
if (token.type === Tokenizer.END_TAG_TOKEN &&
(token.tagName === $.HTML ||
token.tagName === $.BODY && this.openElements.hasInScope($.BODY))) {
for (var i = this.openElements.stackTop; i >= 0; i--) {
var element = this.openElements.items[i];
if (this.treeAdapter.getTagName(element) === token.tagName) {
setEndLocation(element, token, treeAdapter);
break;
}
}
}
};
//Doctype
parser._setDocumentType = function (token) {
parserProto._setDocumentType.call(this, token);
var documentChildren = this.treeAdapter.getChildNodes(this.document),
cnLength = documentChildren.length;
for (var i = 0; i < cnLength; i++) {
var node = documentChildren[i];
if (this.treeAdapter.isDocumentTypeNode(node)) {
node.__location = token.location;
break;
}
}
};
//Elements
parser._attachElementToTree = function (element) {
//NOTE: _attachElementToTree is called from _appendElement, _insertElement and _insertTemplate methods.
//So we will use token location stored in this methods for the element.
element.__location = attachableElementLocation || null;
attachableElementLocation = null;
parserProto._attachElementToTree.call(this, element);
};
parser._appendElement = function (token, namespaceURI) {
attachableElementLocation = token.location;
parserProto._appendElement.call(this, token, namespaceURI);
};
parser._insertElement = function (token, namespaceURI) {
attachableElementLocation = token.location;
parserProto._insertElement.call(this, token, namespaceURI);
};
parser._insertTemplate = function (token) {
attachableElementLocation = token.location;
parserProto._insertTemplate.call(this, token);
var tmplContent = this.treeAdapter.getTemplateContent(this.openElements.current);
tmplContent.__location = null;
};
parser._insertFakeRootElement = function () {
parserProto._insertFakeRootElement.call(this);
this.openElements.current.__location = null;
};
//Comments
parser._appendCommentNode = function (token, parent) {
parserProto._appendCommentNode.call(this, token, parent);
var children = this.treeAdapter.getChildNodes(parent),
commentNode = children[children.length - 1];
commentNode.__location = token.location;
};
//Text
parser._findFosterParentingLocation = function () {
//NOTE: store last foster parenting location, so we will be able to find inserted text
//in case of foster parenting
lastFosterParentingLocation = parserProto._findFosterParentingLocation.call(this);
return lastFosterParentingLocation;
};
parser._insertCharacters = function (token) {
parserProto._insertCharacters.call(this, token);
var hasFosterParent = this._shouldFosterParentOnInsertion(),
parent = hasFosterParent && lastFosterParentingLocation.parent ||
this.openElements.currentTmplContent ||
this.openElements.current,
siblings = this.treeAdapter.getChildNodes(parent),
textNodeIdx = hasFosterParent && lastFosterParentingLocation.beforeElement ?
siblings.indexOf(lastFosterParentingLocation.beforeElement) - 1 :
siblings.length - 1,
textNode = siblings[textNodeIdx];
//NOTE: if we have location assigned by another token, then just update end position
if (textNode.__location)
textNode.__location.endOffset = token.location.endOffset;
else
textNode.__location = token.location;
};
};