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/*eslint-env es6:false*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
/**
* This is a relatively lightweight DOMParser that is safe to use in a web
* worker. This is far from a complete DOM implementation; however, it should
* contain the minimal set of functionality necessary for Readability.js.
*
* Aside from not implementing the full DOM API, there are other quirks to be
* aware of when using the JSDOMParser:
*
* 1) Properly formed HTML/XML must be used. This means you should be extra
* careful when using this parser on anything received directly from an
* XMLHttpRequest. Providing a serialized string from an XMLSerializer,
* however, should be safe (since the browser's XMLSerializer should
* generate valid HTML/XML). Therefore, if parsing a document from an XHR,
* the recommended approach is to do the XHR in the main thread, use
* XMLSerializer.serializeToString() on the responseXML, and pass the
* resulting string to the worker.
*
* 2) Live NodeLists are not supported. DOM methods and properties such as
* getElementsByTagName() and childNodes return standard arrays. If you
* want these lists to be updated when nodes are removed or added to the
* document, you must take care to manually update them yourself.
*/
(
function
(
global
)
{
// XML only defines these and the numeric ones:
var
entityTable
=
{
"lt"
:
"<"
,
"gt"
:
">"
,
"amp"
:
"&"
,
"quot"
:
'"'
,
"apos"
:
"'"
,
}
;
var
reverseEntityTable
=
{
"<"
:
"<"
,
">"
:
">"
,
"&"
:
"&"
,
'"'
:
"""
,
"'"
:
"'"
,
}
;
function
encodeTextContentHTML
(
s
)
{
return
s
.
replace
(
/
[
&
<
>
]
/
g
,
function
(
x
)
{
return
reverseEntityTable
[
x
]
;
}
)
;
}
function
encodeHTML
(
s
)
{
return
s
.
replace
(
/
[
&
<
>
'
"
]
/
g
,
function
(
x
)
{
return
reverseEntityTable
[
x
]
;
}
)
;
}
function
decodeHTML
(
str
)
{
return
str
.
replace
(
/
&
(
q
u
o
t
|
a
m
p
|
a
p
o
s
|
l
t
|
g
t
)
;
/
g
,
function
(
match
,
tag
)
{
return
entityTable
[
tag
]
;
}
)
.
replace
(
/
&
#
(?:
x
(
[
0
-
9
a
-
z
]
{
1
,
4
}
)
|
(
[
0
-
9
]
{
1
,
4
}
)
)
;
/
gi
,
function
(
match
,
hex
,
numStr
)
{
var
num
=
parseInt
(
hex
||
numStr
,
hex
?
16
:
10
)
;
// read num
return
String
.
fromCharCode
(
num
)
;
}
)
;
}
// When a style is set in JS, map it to the corresponding CSS attribute
var
styleMap
=
{
"alignmentBaseline"
:
"alignment-baseline"
,
"background"
:
"background"
,
"backgroundAttachment"
:
"background-attachment"
,
"backgroundClip"
:
"background-clip"
,
"backgroundColor"
:
"background-color"
,
"backgroundImage"
:
"background-image"
,
"backgroundOrigin"
:
"background-origin"
,
"backgroundPosition"
:
"background-position"
,
"backgroundPositionX"
:
"background-position-x"
,
"backgroundPositionY"
:
"background-position-y"
,
"backgroundRepeat"
:
"background-repeat"
,
"backgroundRepeatX"
:
"background-repeat-x"
,
"backgroundRepeatY"
:
"background-repeat-y"
,
"backgroundSize"
:
"background-size"
,
"baselineShift"
:
"baseline-shift"
,
"border"
:
"border"
,
"borderBottom"
:
"border-bottom"
,
"borderBottomColor"
:
"border-bottom-color"
,
"borderBottomLeftRadius"
:
"border-bottom-left-radius"
,
"borderBottomRightRadius"
:
"border-bottom-right-radius"
,
"borderBottomStyle"
:
"border-bottom-style"
,
"borderBottomWidth"
:
"border-bottom-width"
,
"borderCollapse"
:
"border-collapse"
,
"borderColor"
:
"border-color"
,
"borderImage"
:
"border-image"
,
"borderImageOutset"
:
"border-image-outset"
,
"borderImageRepeat"
:
"border-image-repeat"
,
"borderImageSlice"
:
"border-image-slice"
,
"borderImageSource"
:
"border-image-source"
,
"borderImageWidth"
:
"border-image-width"
,
"borderLeft"
:
"border-left"
,
"borderLeftColor"
:
"border-left-color"
,
"borderLeftStyle"
:
"border-left-style"
,
"borderLeftWidth"
:
"border-left-width"
,
"borderRadius"
:
"border-radius"
,
"borderRight"
:
"border-right"
,
"borderRightColor"
:
"border-right-color"
,
"borderRightStyle"
:
"border-right-style"
,
"borderRightWidth"
:
"border-right-width"
,
"borderSpacing"
:
"border-spacing"
,
"borderStyle"
:
"border-style"
,
"borderTop"
:
"border-top"
,
"borderTopColor"
:
"border-top-color"
,
"borderTopLeftRadius"
:
"border-top-left-radius"
,
"borderTopRightRadius"
:
"border-top-right-radius"
,
"borderTopStyle"
:
"border-top-style"
,
"borderTopWidth"
:
"border-top-width"
,
"borderWidth"
:
"border-width"
,
"bottom"
:
"bottom"
,
"boxShadow"
:
"box-shadow"
,
"boxSizing"
:
"box-sizing"
,
"captionSide"
:
"caption-side"
,
"clear"
:
"clear"
,
"clip"
:
"clip"
,
"clipPath"
:
"clip-path"
,
"clipRule"
:
"clip-rule"
,
"color"
:
"color"
,
"colorInterpolation"
:
"color-interpolation"
,
"colorInterpolationFilters"
:
"color-interpolation-filters"
,
"colorProfile"
:
"color-profile"
,
"colorRendering"
:
"color-rendering"
,
"content"
:
"content"
,
"counterIncrement"
:
"counter-increment"
,
"counterReset"
:
"counter-reset"
,
"cursor"
:
"cursor"
,
"direction"
:
"direction"
,
"display"
:
"display"
,
"dominantBaseline"
:
"dominant-baseline"
,
"emptyCells"
:
"empty-cells"
,
"enableBackground"
:
"enable-background"
,
"fill"
:
"fill"
,
"fillOpacity"
:
"fill-opacity"
,
"fillRule"
:
"fill-rule"
,
"filter"
:
"filter"
,
"cssFloat"
:
"float"
,
"floodColor"
:
"flood-color"
,
"floodOpacity"
:
"flood-opacity"
,
"font"
:
"font"
,
"fontFamily"
:
"font-family"
,
"fontSize"
:
"font-size"
,
"fontStretch"
:
"font-stretch"
,
"fontStyle"
:
"font-style"
,
"fontVariant"
:
"font-variant"
,
"fontWeight"
:
"font-weight"
,
"glyphOrientationHorizontal"
:
"glyph-orientation-horizontal"
,
"glyphOrientationVertical"
:
"glyph-orientation-vertical"
,
"height"
:
"height"
,
"imageRendering"
:
"image-rendering"
,
"kerning"
:
"kerning"
,
"left"
:
"left"
,
"letterSpacing"
:
"letter-spacing"
,
"lightingColor"
:
"lighting-color"
,
"lineHeight"
:
"line-height"
,
"listStyle"
:
"list-style"
,
"listStyleImage"
:
"list-style-image"
,
"listStylePosition"
:
"list-style-position"
,
"listStyleType"
:
"list-style-type"
,
"margin"
:
"margin"
,
"marginBottom"
:
"margin-bottom"
,
"marginLeft"
:
"margin-left"
,
"marginRight"
:
"margin-right"
,
"marginTop"
:
"margin-top"
,
"marker"
:
"marker"
,
"markerEnd"
:
"marker-end"
,
"markerMid"
:
"marker-mid"
,
"markerStart"
:
"marker-start"
,
"mask"
:
"mask"
,
"maxHeight"
:
"max-height"
,
"maxWidth"
:
"max-width"
,
"minHeight"
:
"min-height"
,
"minWidth"
:
"min-width"
,
"opacity"
:
"opacity"
,
"orphans"
:
"orphans"
,
"outline"
:
"outline"
,
"outlineColor"
:
"outline-color"
,
"outlineOffset"
:
"outline-offset"
,
"outlineStyle"
:
"outline-style"
,
"outlineWidth"
:
"outline-width"
,
"overflow"
:
"overflow"
,
"overflowX"
:
"overflow-x"
,
"overflowY"
:
"overflow-y"
,
"padding"
:
"padding"
,
"paddingBottom"
:
"padding-bottom"
,
"paddingLeft"
:
"padding-left"
,
"paddingRight"
:
"padding-right"
,
"paddingTop"
:
"padding-top"
,
"page"
:
"page"
,
"pageBreakAfter"
:
"page-break-after"
,
"pageBreakBefore"
:
"page-break-before"
,
"pageBreakInside"
:
"page-break-inside"
,
"pointerEvents"
:
"pointer-events"
,
"position"
:
"position"
,
"quotes"
:
"quotes"
,
"resize"
:
"resize"
,
"right"
:
"right"
,
"shapeRendering"
:
"shape-rendering"
,
"size"
:
"size"
,
"speak"
:
"speak"
,
"src"
:
"src"
,
"stopColor"
:
"stop-color"
,
"stopOpacity"
:
"stop-opacity"
,
"stroke"
:
"stroke"
,
"strokeDasharray"
:
"stroke-dasharray"
,
"strokeDashoffset"
:
"stroke-dashoffset"
,
"strokeLinecap"
:
"stroke-linecap"
,
"strokeLinejoin"
:
"stroke-linejoin"
,
"strokeMiterlimit"
:
"stroke-miterlimit"
,
"strokeOpacity"
:
"stroke-opacity"
,
"strokeWidth"
:
"stroke-width"
,
"tableLayout"
:
"table-layout"
,
"textAlign"
:
"text-align"
,
"textAnchor"
:
"text-anchor"
,
"textDecoration"
:
"text-decoration"
,
"textIndent"
:
"text-indent"
,
"textLineThrough"
:
"text-line-through"
,
"textLineThroughColor"
:
"text-line-through-color"
,
"textLineThroughMode"
:
"text-line-through-mode"
,
"textLineThroughStyle"
:
"text-line-through-style"
,
"textLineThroughWidth"
:
"text-line-through-width"
,
"textOverflow"
:
"text-overflow"
,
"textOverline"
:
"text-overline"
,
"textOverlineColor"
:
"text-overline-color"
,
"textOverlineMode"
:
"text-overline-mode"
,
"textOverlineStyle"
:
"text-overline-style"
,
"textOverlineWidth"
:
"text-overline-width"
,
"textRendering"
:
"text-rendering"
,
"textShadow"
:
"text-shadow"
,
"textTransform"
:
"text-transform"
,
"textUnderline"
:
"text-underline"
,
"textUnderlineColor"
:
"text-underline-color"
,
"textUnderlineMode"
:
"text-underline-mode"
,
"textUnderlineStyle"
:
"text-underline-style"
,
"textUnderlineWidth"
:
"text-underline-width"
,
"top"
:
"top"
,
"unicodeBidi"
:
"unicode-bidi"
,
"unicodeRange"
:
"unicode-range"
,
"vectorEffect"
:
"vector-effect"
,
"verticalAlign"
:
"vertical-align"
,
"visibility"
:
"visibility"
,
"whiteSpace"
:
"white-space"
,
"widows"
:
"widows"
,
"width"
:
"width"
,
"wordBreak"
:
"word-break"
,
"wordSpacing"
:
"word-spacing"
,
"wordWrap"
:
"word-wrap"
,
"writingMode"
:
"writing-mode"
,
"zIndex"
:
"z-index"
,
"zoom"
:
"zoom"
,
}
;
// Elements that can be self-closing
var
voidElems
=
{
"area"
:
true
,
"base"
:
true
,
"br"
:
true
,
"col"
:
true
,
"command"
:
true
,
"embed"
:
true
,
"hr"
:
true
,
"img"
:
true
,
"input"
:
true
,
"link"
:
true
,
"meta"
:
true
,
"param"
:
true
,
"source"
:
true
,
"wbr"
:
true
}
;
var
whitespace
=
[
" "
,
"\t"
,
"\n"
,
"\r"
]
;
// See http://www.w3schools.com/dom/dom_nodetype.asp
var
nodeTypes
=
{
ELEMENT_NODE
:
1
,
ATTRIBUTE_NODE
:
2
,
TEXT_NODE
:
3
,
CDATA_SECTION_NODE
:
4
,
ENTITY_REFERENCE_NODE
:
5
,
ENTITY_NODE
:
6
,
PROCESSING_INSTRUCTION_NODE
:
7
,
COMMENT_NODE
:
8
,
DOCUMENT_NODE
:
9
,
DOCUMENT_TYPE_NODE
:
10
,
DOCUMENT_FRAGMENT_NODE
:
11
,
NOTATION_NODE
:
12
}
;
function
getElementsByTagName
(
tag
)
{
tag
=
tag
.
toUpperCase
(
)
;
var
elems
=
[
]
;
var
allTags
=
(
tag
===
"*"
)
;
function
getElems
(
node
)
{
var
length
=
node
.
children
.
length
;
for
(
var
i
=
0
;
i
<
length
;
i
++
)
{
var
child
=
node
.
children
[
i
]
;
if
(
allTags
||
(
child
.
tagName
===
tag
)
)
elems
.
push
(
child
)
;
getElems
(
child
)
;
}
}
getElems
(
this
)
;
return
elems
;
}
var
Node
=
function
(
)
{
}
;
Node
.
prototype
=
{
attributes
:
null
,
childNodes
:
null
,
localName
:
null
,
nodeName
:
null
,
parentNode
:
null
,
textContent
:
null
,
nextSibling
:
null
,
previousSibling
:
null
,
get
firstChild
(
)
{
return
this
.
childNodes
[
0
]
||
null
;
}
,
get
firstElementChild
(
)
{
return
this
.
children
[
0
]
||
null
;
}
,
get
lastChild
(
)
{
return
this
.
childNodes
[
this
.
childNodes
.
length
-
1
]
||
null
;
}
,
get
lastElementChild
(
)
{
return
this
.
children
[
this
.
children
.
length
-
1
]
||
null
;
}
,
appendChild
:
function
(
child
)
{
if
(
child
.
parentNode
)
{
child
.
parentNode
.
removeChild
(
child
)
;
}
var
last
=
this
.
lastChild
;
if
(
last
)
last
.
nextSibling
=
child
;
child
.
previousSibling
=
last
;
if
(
child
.
nodeType
===
Node
.
ELEMENT_NODE
)
{
child
.
previousElementSibling
=
this
.
children
[
this
.
children
.
length
-
1
]
||
null
;
this
.
children
.
push
(
child
)
;
child
.
previousElementSibling
&&
(
child
.
previousElementSibling
.
nextElementSibling
=
child
)
;
}
this
.
childNodes
.
push
(
child
)
;
child
.
parentNode
=
this
;
}
,
removeChild
:
function
(
child
)
{
var
childNodes
=
this
.
childNodes
;
var
childIndex
=
childNodes
.
indexOf
(
child
)
;
if
(
childIndex
===
-
1
)
{
throw
"removeChild: node not found"
;
}
else
{
child
.
parentNode
=
null
;
var
prev
=
child
.
previousSibling
;
var
next
=
child
.
nextSibling
;
if
(
prev
)
prev
.
nextSibling
=
next
;
if
(
next
)
next
.
previousSibling
=
prev
;
if
(
child
.
nodeType
===
Node
.
ELEMENT_NODE
)
{
prev
=
child
.
previousElementSibling
;
next
=
child
.
nextElementSibling
;
if
(
prev
)
prev
.
nextElementSibling
=
next
;
if
(
next
)
next
.
previousElementSibling
=
prev
;
this
.
children
.
splice
(
this
.
children
.
indexOf
(
child
)
,
1
)
;
}
child
.
previousSibling
=
child
.
nextSibling
=
null
;
child
.
previousElementSibling
=
child
.
nextElementSibling
=
null
;
return
childNodes
.
splice
(
childIndex
,
1
)
[
0
]
;
}
}
,
replaceChild
:
function
(
newNode
,
oldNode
)
{
var
childNodes
=
this
.
childNodes
;
var
childIndex
=
childNodes
.
indexOf
(
oldNode
)
;
if
(
childIndex
===
-
1
)
{
throw
"replaceChild: node not found"
;
}
else
{
// This will take care of updating the new node if it was somewhere else before:
if
(
newNode
.
parentNode
)
newNode
.
parentNode
.
removeChild
(
newNode
)
;
childNodes
[
childIndex
]
=
newNode
;
// update the new node's sibling properties, and its new siblings' sibling properties
newNode
.
nextSibling
=
oldNode
.
nextSibling
;
newNode
.
previousSibling
=
oldNode
.
previousSibling
;
if
(
newNode
.
nextSibling
)
newNode
.
nextSibling
.
previousSibling
=
newNode
;
if
(
newNode
.
previousSibling
)
newNode
.
previousSibling
.
nextSibling
=
newNode
;
newNode
.
parentNode
=
this
;
// Now deal with elements before we clear out those values for the old node,
// because it can help us take shortcuts here:
if
(
newNode
.
nodeType
===
Node
.
ELEMENT_NODE
)
{
if
(
oldNode
.
nodeType
===
Node
.
ELEMENT_NODE
)
{
// Both were elements, which makes this easier, we just swap things out:
newNode
.
previousElementSibling
=
oldNode
.
previousElementSibling
;
newNode
.
nextElementSibling
=
oldNode
.
nextElementSibling
;
if
(
newNode
.
previousElementSibling
)
newNode
.
previousElementSibling
.
nextElementSibling
=
newNode
;
if
(
newNode
.
nextElementSibling
)
newNode
.
nextElementSibling
.
previousElementSibling
=
newNode
;
this
.
children
[
this
.
children
.
indexOf
(
oldNode
)
]
=
newNode
;
}
else
{
// Hard way:
newNode
.
previousElementSibling
=
(
function
(
)
{
for
(
var
i
=
childIndex
-
1
;
i
>=
0
;
i
--
)
{
if
(
childNodes
[
i
]
.
nodeType
===
Node
.
ELEMENT_NODE
)
return
childNodes
[
i
]
;
}
return
null
;
}
)
(
)
;
if
(
newNode
.
previousElementSibling
)
{
newNode
.
nextElementSibling
=
newNode
.
previousElementSibling
.
nextElementSibling
;
}
else
{
newNode
.
nextElementSibling
=
(
function
(
)
{
for
(
var
i
=
childIndex
+
1
;
i
<
childNodes
.
length
;
i
++
)
{
if
(
childNodes
[
i
]
.
nodeType
===
Node
.
ELEMENT_NODE
)
return
childNodes
[
i
]
;
}
return
null
;
}
)
(
)
;
}
if
(
newNode
.
previousElementSibling
)
newNode
.
previousElementSibling
.
nextElementSibling
=
newNode
;
if
(
newNode
.
nextElementSibling
)
newNode
.
nextElementSibling
.
previousElementSibling
=
newNode
;
if
(
newNode
.
nextElementSibling
)
this
.
children
.
splice
(
this
.
children
.
indexOf
(
newNode
.
nextElementSibling
)
,
0
,
newNode
)
;
else
this
.
children
.
push
(
newNode
)
;
}
}
else
if
(
oldNode
.
nodeType
===
Node
.
ELEMENT_NODE
)
{
// new node is not an element node.
// if the old one was, update its element siblings:
if
(
oldNode
.
previousElementSibling
)
oldNode
.
previousElementSibling
.
nextElementSibling
=
oldNode
.
nextElementSibling
;
if
(
oldNode
.
nextElementSibling
)
oldNode
.
nextElementSibling
.
previousElementSibling
=
oldNode
.
previousElementSibling
;
this
.
children
.
splice
(
this
.
children
.
indexOf
(
oldNode
)
,
1
)
;
// If the old node wasn't an element, neither the new nor the old node was an element,
// and the children array and its members shouldn't need any updating.
}
oldNode
.
parentNode
=
null
;
oldNode
.
previousSibling
=
null
;
oldNode
.
nextSibling
=
null
;
if
(
oldNode
.
nodeType
===
Node
.
ELEMENT_NODE
)
{
oldNode
.
previousElementSibling
=
null
;
oldNode
.
nextElementSibling
=
null
;
}
return
oldNode
;
}
}
,
__JSDOMParser__
:
true
,
}
;
for
(
var
nodeType
in
nodeTypes
)
{
Node
[
nodeType
]
=
Node
.
prototype
[
nodeType
]
=
nodeTypes
[
nodeType
]
;
}
var
Attribute
=
function
(
name
,
value
)
{
this
.
name
=
name
;
this
.
_value
=
value
;
}
;
Attribute
.
prototype
=
{
get
value
(
)
{
return
this
.
_value
;
}
,
setValue
:
function
(
newValue
)
{
this
.
_value
=
newValue
;
delete
this
.
_decodedValue
;
}
,
setDecodedValue
:
function
(
newValue
)
{
this
.
_value
=
encodeHTML
(
newValue
)
;
this
.
_decodedValue
=
newValue
;
}
,
getDecodedValue
:
function
(
)
{
if
(
typeof
this
.
_decodedValue
===
"undefined"
)
{
this
.
_decodedValue
=
(
this
.
_value
&&
decodeHTML
(
this
.
_value
)
)
||
""
;
}
return
this
.
_decodedValue
;
}
,
}
;
var
Comment
=
function
(
)
{
this
.
childNodes
=
[
]
;
}
;
Comment
.
prototype
=
{
__proto__
:
Node
.
prototype
,
nodeName
:
"#comment"
,
nodeType
:
Node
.
COMMENT_NODE
}
;
var
Text
=
function
(
)
{
this
.
childNodes
=
[
]
;
}
;
Text
.
prototype
=
{
__proto__
:
Node
.
prototype
,
nodeName
:
"#text"
,
nodeType
:
Node
.
TEXT_NODE
,
get
textContent
(
)
{
if
(
typeof
this
.
_textContent
===
"undefined"
)
{
this
.
_textContent
=
decodeHTML
(
this
.
_innerHTML
||
""
)
;
}
return
this
.
_textContent
;
}
,
get
innerHTML
(
)
{
if
(
typeof
this
.
_innerHTML
===
"undefined"
)
{
this
.
_innerHTML
=
encodeTextContentHTML
(
this
.
_textContent
||
""
)
;
}
return
this
.
_innerHTML
;
}
,
set
innerHTML
(
newHTML
)
{
this
.
_innerHTML
=
newHTML
;
delete
this
.
_textContent
;
}
,
set
textContent
(
newText
)
{
this
.
_textContent
=
newText
;
delete
this
.
_innerHTML
;
}
,
}
;
var
Document
=
function
(
url
)
{
this
.
documentURI
=
url
;
this
.
styleSheets
=
[
]
;
this
.
childNodes
=
[
]
;
this
.
children
=
[
]
;
}
;
Document
.
prototype
=
{
__proto__
:
Node
.
prototype
,
nodeName
:
"#document"
,
nodeType
:
Node
.
DOCUMENT_NODE
,
title
:
""
,
getElementsByTagName
:
getElementsByTagName
,
getElementById
:
function
(
id
)
{
function
getElem
(
node
)
{
var
length
=
node
.
children
.
length
;
if
(
node
.
id
===
id
)
return
node
;
for
(
var
i
=
0
;
i
<
length
;
i
++
)
{
var
el
=
getElem
(
node
.
children
[
i
]
)
;
if
(
el
)
return
el
;
}
return
null
;
}
return
getElem
(
this
)
;
}
,
createElement
:
function
(
tag
)
{
var
node
=
new
Element
(
tag
)
;
return
node
;
}
,
createTextNode
:
function
(
text
)
{
var
node
=
new
Text
(
)
;
node
.
textContent
=
text
;
return
node
;
}
,
get
baseURI
(
)
{
if
(
!
this
.
hasOwnProperty
(
"_baseURI"
)
)
{
this
.
_baseURI
=
this
.
documentURI
;
var
baseElements
=
this
.
getElementsByTagName
(
"base"
)
;
var
href
=
baseElements
[
0
]
&&
baseElements
[
0
]
.
getAttribute
(
"href"
)
;
if
(
href
)
{
try
{
this
.
_baseURI
=
(
new
URL
(
href
,
this
.
_baseURI
)
)
.
href
;
}
catch
(
ex
)
{
/* Just fall back to documentURI */
}
}
}
return
this
.
_baseURI
;
}
,
}
;
var
Element
=
function
(
tag
)
{
// We use this to find the closing tag.
this
.
_matchingTag
=
tag
;
// We're explicitly a non-namespace aware parser, we just pretend it's all HTML.
var
lastColonIndex
=
tag
.
lastIndexOf
(
":"
)
;
if
(
lastColonIndex
!=
-
1
)
{
tag
=
tag
.
substring
(
lastColonIndex
+
1
)
;
}
this
.
attributes
=
[
]
;
this
.
childNodes
=
[
]
;
this
.
children
=
[
]
;
this
.
nextElementSibling
=
this
.
previousElementSibling
=
null
;
this
.
localName
=
tag
.
toLowerCase
(
)
;
this
.
tagName
=
tag
.
toUpperCase
(
)
;
this
.
style
=
new
Style
(
this
)
;
}
;
Element
.
prototype
=
{
__proto__
:
Node
.
prototype
,
nodeType
:
Node
.
ELEMENT_NODE
,
getElementsByTagName
:
getElementsByTagName
,
get
className
(
)
{
return
this
.
getAttribute
(
"class"
)
||
""
;
}
,
set
className
(
str
)
{
this
.
setAttribute
(
"class"
,
str
)
;
}
,
get
id
(
)
{
return
this
.
getAttribute
(
"id"
)
||
""
;
}
,
set
id
(
str
)
{
this
.
setAttribute
(
"id"
,
str
)
;
}
,
get
href
(
)
{
return
this
.
getAttribute
(
"href"
)
||
""
;
}
,
set
href
(
str
)
{
this
.
setAttribute
(
"href"
,
str
)
;
}
,
get
src
(
)
{
return
this
.
getAttribute
(
"src"
)
||
""
;
}
,
set
src
(
str
)
{
this
.
setAttribute
(
"src"
,
str
)
;
}
,
get
nodeName
(
)
{
return
this
.
tagName
;
}
,
get
innerHTML
(
)
{
function
getHTML
(
node
)
{
var
i
=
0
;
for
(
i
=
0
;
i
<
node
.
childNodes
.
length
;
i
++
)
{
var
child
=
node
.
childNodes
[
i
]
;
if
(
child
.
localName
)
{
arr
.
push
(
"<"
+
child
.
localName
)
;
// serialize attribute list
for
(
var
j
=
0
;
j
<
child
.
attributes
.
length
;
j
++
)
{
var
attr
=
child
.
attributes
[
j
]
;
// the attribute value will be HTML escaped.
var
val
=
attr
.
value
;
var
quote
=
(
val
.
indexOf
(
'"'
)
===
-
1
?
'"'
:
"'"
)
;
arr
.
push
(
" "
+
attr
.
name
+
"="
+
quote
+
val
+
quote
)
;
}
if
(
child
.
localName
in
voidElems
&&
!
child
.
childNodes
.
length
)
{
// if this is a self-closing element, end it here
arr
.
push
(
"/>"
)
;
}
else
{
// otherwise, add its children
arr
.
push
(
">"
)
;
getHTML
(
child
)
;
arr
.
push
(
"</"
+
child
.
localName
+
">"
)
;
}
}
else
{
// This is a text node, so asking for innerHTML won't recurse.
arr
.
push
(
child
.
innerHTML
)
;
}
}
}
// Using Array.join() avoids the overhead from lazy string concatenation.
// See http://blog.cdleary.com/2012/01/string-representation-in-spidermonkey/#ropes
var
arr
=
[
]
;
getHTML
(
this
)
;
return
arr
.
join
(
""
)
;
}
,
set
innerHTML
(
html
)
{
var
parser
=
new
JSDOMParser
(
)
;
var
node
=
parser
.
parse
(
html
)
;
var
i
;
for
(
i
=
this
.
childNodes
.
length
;
--
i
>=
0
;
)
{
this
.
childNodes
[
i
]
.
parentNode
=
null
;
}
this
.
childNodes
=
node
.
childNodes
;
this
.
children
=
node
.
children
;
for
(
i
=
this
.
childNodes
.
length
;
--
i
>=
0
;
)
{
this
.
childNodes
[
i
]
.
parentNode
=
this
;
}
}
,
set
textContent
(
text
)
{
// clear parentNodes for existing children
for
(
var
i
=
this
.
childNodes
.
length
;
--
i
>=
0
;
)
{
this
.
childNodes
[
i
]
.
parentNode
=
null
;
}
var
node
=
new
Text
(
)
;
this
.
childNodes
=
[
node
]
;
this
.
children
=
[
]
;
node
.
textContent
=
text
;
node
.
parentNode
=
this
;
}
,
get
textContent
(
)
{
function
getText
(
node
)
{
var
nodes
=
node
.
childNodes
;
for
(
var
i
=
0
;
i
<
nodes
.
length
;
i
++
)
{
var
child
=
nodes
[
i
]
;
if
(
child
.
nodeType
===
3
)
{
text
.
push
(
child
.
textContent
)
;
}
else
{
getText
(
child
)
;
}
}
}
// Using Array.join() avoids the overhead from lazy string concatenation.
// See http://blog.cdleary.com/2012/01/string-representation-in-spidermonkey/#ropes
var
text
=
[
]
;
getText
(
this
)
;
return
text
.
join
(
""
)
;
}
,
getAttribute
:
function
(
name
)
{
for
(
var
i
=
this
.
attributes
.
length
;
--
i
>=
0
;
)
{
var
attr
=
this
.
attributes
[
i
]
;
if
(
attr
.
name
===
name
)
return
attr
.
getDecodedValue
(
)
;
}
return
undefined
;
}
,
setAttribute
:
function
(
name
,
value
)
{
for
(
var
i
=
this
.
attributes
.
length
;
--
i
>=
0
;
)
{
var
attr
=
this
.
attributes
[
i
]
;
if
(
attr
.
name
===
name
)
{
attr
.
setDecodedValue
(
value
)
;
return
;
}
}
this
.
attributes
.
push
(
new
Attribute
(
name
,
encodeHTML
(
value
)
)
)
;
}
,
removeAttribute
:
function
(
name
)
{
for
(
var
i
=
this
.
attributes
.
length
;
--
i
>=
0
;
)
{
var
attr
=
this
.
attributes
[
i
]
;
if
(
attr
.
name
===
name
)
{
this
.
attributes
.
splice
(
i
,
1
)
;
break
;
}
}
}
,
hasAttribute
:
function
(
name
)
{
return
this
.
attributes
.
some
(
function
(
attr
)
{
return
attr
.
name
==
name
;
}
)
;
}
,
}
;
var
Style
=
function
(
node
)
{
this
.
node
=
node
;
}
;
// getStyle() and setStyle() use the style attribute string directly. This
// won't be very efficient if there are a lot of style manipulations, but
// it's the easiest way to make sure the style attribute string and the JS
// style property stay in sync. Readability.js doesn't do many style
// manipulations, so this should be okay.
Style
.
prototype
=
{
getStyle
:
function
(
styleName
)
{
var
attr
=
this
.
node
.
getAttribute
(
"style"
)
;
if
(
!
attr
)
return
undefined
;
var
styles
=
attr
.
split
(
";"
)
;
for
(
var
i
=
0
;
i
<
styles
.
length
;
i
++
)
{
var
style
=
styles
[
i
]
.
split
(
":"
)
;
var
name
=
style
[
0
]
.
trim
(
)
;
if
(
name
===
styleName
)
return
style
[
1
]
.
trim
(
)
;
}
return
undefined
;
}
,
setStyle
:
function
(
styleName
,
styleValue
)
{
var
value
=
this
.
node
.
getAttribute
(
"style"
)
||
""
;
var
index
=
0
;
do
{
var
next
=
value
.
indexOf
(
";"
,
index
)
+
1
;
var
length
=
next
-
index
-
1
;
var
style
=
(
length
>
0
?
value
.
substr
(
index
,
length
)
:
value
.
substr
(
index
)
)
;
if
(
style
.
substr
(
0
,
style
.
indexOf
(
":"
)
)
.
trim
(
)
===
styleName
)
{
value
=
value
.
substr
(
0
,
index
)
.
trim
(
)
+
(
next
?
" "
+
value
.
substr
(
next
)
.
trim
(
)
:
""
)
;
break
;
}
index
=
next
;
}
while
(
index
)
;
value
+=
" "
+
styleName
+
": "
+
styleValue
+
";"
;
this
.
node
.
setAttribute
(
"style"
,
value
.
trim
(
)
)
;
}
}
;
// For each item in styleMap, define a getter and setter on the style
// property.
for
(
var
jsName
in
styleMap
)
{
(
function
(
cssName
)
{
Style
.
prototype
.
__defineGetter__
(
jsName
,
function
(
)
{
return
this
.
getStyle
(
cssName
)
;
}
)
;
Style
.
prototype
.
__defineSetter__
(
jsName
,
function
(
value
)
{
this
.
setStyle
(
cssName
,
value
)
;
}
)
;
}
)
(
styleMap
[
jsName
]
)
;
}
var
JSDOMParser
=
function
(
)
{
this
.
currentChar
=
0
;
// In makeElementNode() we build up many strings one char at a time. Using
// += for this results in lots of short-lived intermediate strings. It's
// better to build an array of single-char strings and then join() them
// together at the end. And reusing a single array (i.e. |this.strBuf|)
// over and over for this purpose uses less memory than using a new array
// for each string.
this
.
strBuf
=
[
]
;
// Similarly, we reuse this array to return the two arguments from
// makeElementNode(), which saves us from having to allocate a new array
// every time.
this
.
retPair
=
[
]
;
this
.
errorState
=
""
;
}
;
JSDOMParser
.
prototype
=
{
error
:
function
(
m
)
{
dump
(
"JSDOMParser error: "
+
m
+
"\n"
)
;
this
.
errorState
+=
m
+
"\n"
;
}
,
/**
* Look at the next character without advancing the index.
*/
peekNext
:
function
(
)
{
return
this
.
html
[
this
.
currentChar
]
;
}
,
/**
* Get the next character and advance the index.
*/
nextChar
:
function
(
)
{
return
this
.
html
[
this
.
currentChar
++
]
;
}
,
/**
* Called after a quote character is read. This finds the next quote
* character and returns the text string in between.
*/
readString
:
function
(
quote
)
{
var
str
;
var
n
=
this
.
html
.
indexOf
(
quote
,
this
.
currentChar
)
;
if
(
n
===
-
1
)
{
this
.
currentChar
=
this
.
html
.
length
;
str
=
null
;
}
else
{
str
=
this
.
html
.
substring
(
this
.
currentChar
,
n
)
;
this
.
currentChar
=
n
+
1
;
}
return
str
;
}
,
/**
* Called when parsing a node. This finds the next name/value attribute
* pair and adds the result to the attributes list.
*/
readAttribute
:
function
(
node
)
{
var
name
=
""
;
var
n
=
this
.
html
.
indexOf
(
"="
,
this
.
currentChar
)
;
if
(
n
===
-
1
)
{
this
.
currentChar
=
this
.
html
.
length
;
}
else
{
// Read until a '=' character is hit; this will be the attribute key
name
=
this
.
html
.
substring
(
this
.
currentChar
,
n
)
;
this
.
currentChar
=
n
+
1
;
}
if
(
!
name
)
return
;
// After a '=', we should see a '"' for the attribute value
var
c
=
this
.
nextChar
(
)
;
if
(
c
!==
'"'
&&
c
!==
"'"
)
{
this
.
error
(
"Error reading attribute "
+
name
+
", expecting '\"'"
)
;
return
;
}
// Read the attribute value (and consume the matching quote)
var
value
=
this
.
readString
(
c
)
;
node
.
attributes
.
push
(
new
Attribute
(
name
,
value
)
)
;
return
;
}
,
/**
* Parses and returns an Element node. This is called after a '<' has been
* read.
*
*
@returns
an array; the first index of the array is the parsed node;
* the second index is a boolean indicating whether this is a void
* Element
*/
makeElementNode
:
function
(
retPair
)
{
var
c
=
this
.
nextChar
(
)
;
// Read the Element tag name
var
strBuf
=
this
.
strBuf
;
strBuf
.
length
=
0
;
while
(
whitespace
.
indexOf
(
c
)
==
-
1
&&
c
!==
">"
&&
c
!==
"/"
)
{
if
(
c
===
undefined
)
return
false
;
strBuf
.
push
(
c
)
;
c
=
this
.
nextChar
(
)
;
}
var
tag
=
strBuf
.
join
(
""
)
;
if
(
!
tag
)
return
false
;
var
node
=
new
Element
(
tag
)
;
// Read Element attributes
while
(
c
!==
"/"
&&
c
!==
">"
)
{
if
(
c
===
undefined
)
return
false
;
while
(
whitespace
.
indexOf
(
this
.
html
[
this
.
currentChar
++
]
)
!=
-
1
)
{
// Advance cursor to first non-whitespace char.
}
this
.
currentChar
--
;
c
=
this
.
nextChar
(
)
;
if
(
c
!==
"/"
&&
c
!==
">"
)
{
--
this
.
currentChar
;
this
.
readAttribute
(
node
)
;
}
}
// If this is a self-closing tag, read '/>'
var
closed
=
false
;
if
(
c
===
"/"
)
{
closed
=
true
;
c
=
this
.
nextChar
(
)
;
if
(
c
!==
">"
)
{
this
.
error
(
"expected '>' to close "
+
tag
)
;
return
false
;
}
}
retPair
[
0
]
=
node
;
retPair
[
1
]
=
closed
;
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