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build: move e2e dependencies into e2e/go.mod

Browse Source 
Several packages are only used while running the e2e suite. These
packages are less important to update, as the they can not influence the
final executable that is part of the Ceph-CSI container-image.

By moving these dependencies out of the main Ceph-CSI go.mod, it is
easier to identify if a reported CVE affects Ceph-CSI, or only the
testing (like most of the Kubernetes CVEs).

Signed-off-by: Niels de Vos <ndevos@ibm.com>
This commit is contained in:
Niels de Vos
2025-03-04 08:57:28 +01:00
committed by mergify[bot]
parent 15da101b1b
commit bec6090996
8047 changed files with 1407827 additions and 3453 deletions
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78
e2e/vendor/golang.org/x/net/html/atom/atom.go generated vendored Normal file
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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package atom provides integer codes (also known as atoms) for a fixed set of
// frequently occurring HTML strings: tag names and attribute keys such as "p"
// and "id".
//
// Sharing an atom's name between all elements with the same tag can result in
// fewer string allocations when tokenizing and parsing HTML. Integer
// comparisons are also generally faster than string comparisons.
//
// The value of an atom's particular code is not guaranteed to stay the same
// between versions of this package. Neither is any ordering guaranteed:
// whether atom.H1 < atom.H2 may also change. The codes are not guaranteed to
// be dense. The only guarantees are that e.g. looking up "div" will yield
// atom.Div, calling atom.Div.String will return "div", and atom.Div != 0.
package atom // import "golang.org/x/net/html/atom"
// Atom is an integer code for a string. The zero value maps to "".
type Atom uint32
// String returns the atom's name.
func (a Atom) String() string {
start := uint32(a >> 8)
n := uint32(a & 0xff)
if start+n > uint32(len(atomText)) {
return ""
}
return atomText[start : start+n]
}
func (a Atom) string() string {
return atomText[a>>8 : a>>8+a&0xff]
}
// fnv computes the FNV hash with an arbitrary starting value h.
func fnv(h uint32, s []byte) uint32 {
for i := range s {
h ^= uint32(s[i])
h *= 16777619
}
return h
}
func match(s string, t []byte) bool {
for i, c := range t {
if s[i] != c {
return false
}
}
return true
}
// Lookup returns the atom whose name is s. It returns zero if there is no
// such atom. The lookup is case sensitive.
func Lookup(s []byte) Atom {
if len(s) == 0 || len(s) > maxAtomLen {
return 0
}
h := fnv(hash0, s)
if a := table[h&uint32(len(table)-1)]; int(a&0xff) == len(s) && match(a.string(), s) {
return a
}
if a := table[(h>>16)&uint32(len(table)-1)]; int(a&0xff) == len(s) && match(a.string(), s) {
return a
}
return 0
}
// String returns a string whose contents are equal to s. In that sense, it is
// equivalent to string(s) but may be more efficient.
func String(s []byte) string {
if a := Lookup(s); a != 0 {
return a.String()
}
return string(s)
}

783
e2e/vendor/golang.org/x/net/html/atom/table.go generated vendored Normal file
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// Code generated by go generate gen.go; DO NOT EDIT.
//go:generate go run gen.go
package atom
const (
A Atom = 0x1
Abbr Atom = 0x4
Accept Atom = 0x1a06
AcceptCharset Atom = 0x1a0e
Accesskey Atom = 0x2c09
Acronym Atom = 0xaa07
Action Atom = 0x27206
Address Atom = 0x6f307
Align Atom = 0xb105
Allowfullscreen Atom = 0x2080f
Allowpaymentrequest Atom = 0xc113
Allowusermedia Atom = 0xdd0e
Alt Atom = 0xf303
Annotation Atom = 0x1c90a
AnnotationXml Atom = 0x1c90e
Applet Atom = 0x31906
Area Atom = 0x35604
Article Atom = 0x3fc07
As Atom = 0x3c02
Aside Atom = 0x10705
Async Atom = 0xff05
Audio Atom = 0x11505
Autocomplete Atom = 0x2780c
Autofocus Atom = 0x12109
Autoplay Atom = 0x13c08
B Atom = 0x101
Base Atom = 0x3b04
Basefont Atom = 0x3b08
Bdi Atom = 0xba03
Bdo Atom = 0x14b03
Bgsound Atom = 0x15e07
Big Atom = 0x17003
Blink Atom = 0x17305
Blockquote Atom = 0x1870a
Body Atom = 0x2804
Br Atom = 0x202
Button Atom = 0x19106
Canvas Atom = 0x10306
Caption Atom = 0x23107
Center Atom = 0x22006
Challenge Atom = 0x29b09
Charset Atom = 0x2107
Checked Atom = 0x47907
Cite Atom = 0x19c04
Class Atom = 0x56405
Code Atom = 0x5c504
Col Atom = 0x1ab03
Colgroup Atom = 0x1ab08
Color Atom = 0x1bf05
Cols Atom = 0x1c404
Colspan Atom = 0x1c407
Command Atom = 0x1d707
Content Atom = 0x58b07
Contenteditable Atom = 0x58b0f
Contextmenu Atom = 0x3800b
Controls Atom = 0x1de08
Coords Atom = 0x1ea06
Crossorigin Atom = 0x1fb0b
Data Atom = 0x4a504
Datalist Atom = 0x4a508
Datetime Atom = 0x2b808
Dd Atom = 0x2d702
Default Atom = 0x10a07
Defer Atom = 0x5c705
Del Atom = 0x45203
Desc Atom = 0x56104
Details Atom = 0x7207
Dfn Atom = 0x8703
Dialog Atom = 0xbb06
Dir Atom = 0x9303
Dirname Atom = 0x9307
Disabled Atom = 0x16408
Div Atom = 0x16b03
Dl Atom = 0x5e602
Download Atom = 0x46308
Draggable Atom = 0x17a09
Dropzone Atom = 0x40508
Dt Atom = 0x64b02
Em Atom = 0x6e02
Embed Atom = 0x6e05
Enctype Atom = 0x28d07
Face Atom = 0x21e04
Fieldset Atom = 0x22608
Figcaption Atom = 0x22e0a
Figure Atom = 0x24806
Font Atom = 0x3f04
Footer Atom = 0xf606
For Atom = 0x25403
ForeignObject Atom = 0x2540d
Foreignobject Atom = 0x2610d
Form Atom = 0x26e04
Formaction Atom = 0x26e0a
Formenctype Atom = 0x2890b
Formmethod Atom = 0x2a40a
Formnovalidate Atom = 0x2ae0e
Formtarget Atom = 0x2c00a
Frame Atom = 0x8b05
Frameset Atom = 0x8b08
H1 Atom = 0x15c02
H2 Atom = 0x2de02
H3 Atom = 0x30d02
H4 Atom = 0x34502
H5 Atom = 0x34f02
H6 Atom = 0x64d02
Head Atom = 0x33104
Header Atom = 0x33106
Headers Atom = 0x33107
Height Atom = 0x5206
Hgroup Atom = 0x2ca06
Hidden Atom = 0x2d506
High Atom = 0x2db04
Hr Atom = 0x15702
Href Atom = 0x2e004
Hreflang Atom = 0x2e008
Html Atom = 0x5604
HttpEquiv Atom = 0x2e80a
I Atom = 0x601
Icon Atom = 0x58a04
Id Atom = 0x10902
Iframe Atom = 0x2fc06
Image Atom = 0x30205
Img Atom = 0x30703
Input Atom = 0x44b05
Inputmode Atom = 0x44b09
Ins Atom = 0x20403
Integrity Atom = 0x23f09
Is Atom = 0x16502
Isindex Atom = 0x30f07
Ismap Atom = 0x31605
Itemid Atom = 0x38b06
Itemprop Atom = 0x19d08
Itemref Atom = 0x3cd07
Itemscope Atom = 0x67109
Itemtype Atom = 0x31f08
Kbd Atom = 0xb903
Keygen Atom = 0x3206
Keytype Atom = 0xd607
Kind Atom = 0x17704
Label Atom = 0x5905
Lang Atom = 0x2e404
Legend Atom = 0x18106
Li Atom = 0xb202
Link Atom = 0x17404
List Atom = 0x4a904
Listing Atom = 0x4a907
Loop Atom = 0x5d04
Low Atom = 0xc303
Main Atom = 0x1004
Malignmark Atom = 0xb00a
Manifest Atom = 0x6d708
Map Atom = 0x31803
Mark Atom = 0xb604
Marquee Atom = 0x32707
Math Atom = 0x32e04
Max Atom = 0x33d03
Maxlength Atom = 0x33d09
Media Atom = 0xe605
Mediagroup Atom = 0xe60a
Menu Atom = 0x38704
Menuitem Atom = 0x38708
Meta Atom = 0x4b804
Meter Atom = 0x9805
Method Atom = 0x2a806
Mglyph Atom = 0x30806
Mi Atom = 0x34702
Min Atom = 0x34703
Minlength Atom = 0x34709
Mn Atom = 0x2b102
Mo Atom = 0xa402
Ms Atom = 0x67402
Mtext Atom = 0x35105
Multiple Atom = 0x35f08
Muted Atom = 0x36705
Name Atom = 0x9604
Nav Atom = 0x1303
Nobr Atom = 0x3704
Noembed Atom = 0x6c07
Noframes Atom = 0x8908
Nomodule Atom = 0xa208
Nonce Atom = 0x1a605
Noscript Atom = 0x21608
Novalidate Atom = 0x2b20a
Object Atom = 0x26806
Ol Atom = 0x13702
Onabort Atom = 0x19507
Onafterprint Atom = 0x2360c
Onautocomplete Atom = 0x2760e
Onautocompleteerror Atom = 0x27613
Onauxclick Atom = 0x61f0a
Onbeforeprint Atom = 0x69e0d
Onbeforeunload Atom = 0x6e70e
Onblur Atom = 0x56d06
Oncancel Atom = 0x11908
Oncanplay Atom = 0x14d09
Oncanplaythrough Atom = 0x14d10
Onchange Atom = 0x41b08
Onclick Atom = 0x2f507
Onclose Atom = 0x36c07
Oncontextmenu Atom = 0x37e0d
Oncopy Atom = 0x39106
Oncuechange Atom = 0x3970b
Oncut Atom = 0x3a205
Ondblclick Atom = 0x3a70a
Ondrag Atom = 0x3b106
Ondragend Atom = 0x3b109
Ondragenter Atom = 0x3ba0b
Ondragexit Atom = 0x3c50a
Ondragleave Atom = 0x3df0b
Ondragover Atom = 0x3ea0a
Ondragstart Atom = 0x3f40b
Ondrop Atom = 0x40306
Ondurationchange Atom = 0x41310
Onemptied Atom = 0x40a09
Onended Atom = 0x42307
Onerror Atom = 0x42a07
Onfocus Atom = 0x43107
Onhashchange Atom = 0x43d0c
Oninput Atom = 0x44907
Oninvalid Atom = 0x45509
Onkeydown Atom = 0x45e09
Onkeypress Atom = 0x46b0a
Onkeyup Atom = 0x48007
Onlanguagechange Atom = 0x48d10
Onload Atom = 0x49d06
Onloadeddata Atom = 0x49d0c
Onloadedmetadata Atom = 0x4b010
Onloadend Atom = 0x4c609
Onloadstart Atom = 0x4cf0b
Onmessage Atom = 0x4da09
Onmessageerror Atom = 0x4da0e
Onmousedown Atom = 0x4e80b
Onmouseenter Atom = 0x4f30c
Onmouseleave Atom = 0x4ff0c
Onmousemove Atom = 0x50b0b
Onmouseout Atom = 0x5160a
Onmouseover Atom = 0x5230b
Onmouseup Atom = 0x52e09
Onmousewheel Atom = 0x53c0c
Onoffline Atom = 0x54809
Ononline Atom = 0x55108
Onpagehide Atom = 0x5590a
Onpageshow Atom = 0x5730a
Onpaste Atom = 0x57f07
Onpause Atom = 0x59a07
Onplay Atom = 0x5a406
Onplaying Atom = 0x5a409
Onpopstate Atom = 0x5ad0a
Onprogress Atom = 0x5b70a
Onratechange Atom = 0x5cc0c
Onrejectionhandled Atom = 0x5d812
Onreset Atom = 0x5ea07
Onresize Atom = 0x5f108
Onscroll Atom = 0x60008
Onsecuritypolicyviolation Atom = 0x60819
Onseeked Atom = 0x62908
Onseeking Atom = 0x63109
Onselect Atom = 0x63a08
Onshow Atom = 0x64406
Onsort Atom = 0x64f06
Onstalled Atom = 0x65909
Onstorage Atom = 0x66209
Onsubmit Atom = 0x66b08
Onsuspend Atom = 0x67b09
Ontimeupdate Atom = 0x400c
Ontoggle Atom = 0x68408
Onunhandledrejection Atom = 0x68c14
Onunload Atom = 0x6ab08
Onvolumechange Atom = 0x6b30e
Onwaiting Atom = 0x6c109
Onwheel Atom = 0x6ca07
Open Atom = 0x1a304
Optgroup Atom = 0x5f08
Optimum Atom = 0x6d107
Option Atom = 0x6e306
Output Atom = 0x51d06
P Atom = 0xc01
Param Atom = 0xc05
Pattern Atom = 0x6607
Picture Atom = 0x7b07
Ping Atom = 0xef04
Placeholder Atom = 0x1310b
Plaintext Atom = 0x1b209
Playsinline Atom = 0x1400b
Poster Atom = 0x2cf06
Pre Atom = 0x47003
Preload Atom = 0x48607
Progress Atom = 0x5b908
Prompt Atom = 0x53606
Public Atom = 0x58606
Q Atom = 0xcf01
Radiogroup Atom = 0x30a
Rb Atom = 0x3a02
Readonly Atom = 0x35708
Referrerpolicy Atom = 0x3d10e
Rel Atom = 0x48703
Required Atom = 0x24c08
Reversed Atom = 0x8008
Rows Atom = 0x9c04
Rowspan Atom = 0x9c07
Rp Atom = 0x23c02
Rt Atom = 0x19a02
Rtc Atom = 0x19a03
Ruby Atom = 0xfb04
S Atom = 0x2501
Samp Atom = 0x7804
Sandbox Atom = 0x12907
Scope Atom = 0x67505
Scoped Atom = 0x67506
Script Atom = 0x21806
Seamless Atom = 0x37108
Section Atom = 0x56807
Select Atom = 0x63c06
Selected Atom = 0x63c08
Shape Atom = 0x1e505
Size Atom = 0x5f504
Sizes Atom = 0x5f505
Slot Atom = 0x1ef04
Small Atom = 0x20605
Sortable Atom = 0x65108
Sorted Atom = 0x33706
Source Atom = 0x37806
Spacer Atom = 0x43706
Span Atom = 0x9f04
Spellcheck Atom = 0x4740a
Src Atom = 0x5c003
Srcdoc Atom = 0x5c006
Srclang Atom = 0x5f907
Srcset Atom = 0x6f906
Start Atom = 0x3fa05
Step Atom = 0x58304
Strike Atom = 0xd206
Strong Atom = 0x6dd06
Style Atom = 0x6ff05
Sub Atom = 0x66d03
Summary Atom = 0x70407
Sup Atom = 0x70b03
Svg Atom = 0x70e03
System Atom = 0x71106
Tabindex Atom = 0x4be08
Table Atom = 0x59505
Target Atom = 0x2c406
Tbody Atom = 0x2705
Td Atom = 0x9202
Template Atom = 0x71408
Textarea Atom = 0x35208
Tfoot Atom = 0xf505
Th Atom = 0x15602
Thead Atom = 0x33005
Time Atom = 0x4204
Title Atom = 0x11005
Tr Atom = 0xcc02
Track Atom = 0x1ba05
Translate Atom = 0x1f209
Tt Atom = 0x6802
Type Atom = 0xd904
Typemustmatch Atom = 0x2900d
U Atom = 0xb01
Ul Atom = 0xa702
Updateviacache Atom = 0x460e
Usemap Atom = 0x59e06
Value Atom = 0x1505
Var Atom = 0x16d03
Video Atom = 0x2f105
Wbr Atom = 0x57c03
Width Atom = 0x64905
Workertype Atom = 0x71c0a
Wrap Atom = 0x72604
Xmp Atom = 0x12f03
)
const hash0 = 0x81cdf10e
const maxAtomLen = 25
var table = [1 << 9]Atom{
0x1: 0xe60a, // mediagroup
0x2: 0x2e404, // lang
0x4: 0x2c09, // accesskey
0x5: 0x8b08, // frameset
0x7: 0x63a08, // onselect
0x8: 0x71106, // system
0xa: 0x64905, // width
0xc: 0x2890b, // formenctype
0xd: 0x13702, // ol
0xe: 0x3970b, // oncuechange
0x10: 0x14b03, // bdo
0x11: 0x11505, // audio
0x12: 0x17a09, // draggable
0x14: 0x2f105, // video
0x15: 0x2b102, // mn
0x16: 0x38704, // menu
0x17: 0x2cf06, // poster
0x19: 0xf606, // footer
0x1a: 0x2a806, // method
0x1b: 0x2b808, // datetime
0x1c: 0x19507, // onabort
0x1d: 0x460e, // updateviacache
0x1e: 0xff05, // async
0x1f: 0x49d06, // onload
0x21: 0x11908, // oncancel
0x22: 0x62908, // onseeked
0x23: 0x30205, // image
0x24: 0x5d812, // onrejectionhandled
0x26: 0x17404, // link
0x27: 0x51d06, // output
0x28: 0x33104, // head
0x29: 0x4ff0c, // onmouseleave
0x2a: 0x57f07, // onpaste
0x2b: 0x5a409, // onplaying
0x2c: 0x1c407, // colspan
0x2f: 0x1bf05, // color
0x30: 0x5f504, // size
0x31: 0x2e80a, // http-equiv
0x33: 0x601, // i
0x34: 0x5590a, // onpagehide
0x35: 0x68c14, // onunhandledrejection
0x37: 0x42a07, // onerror
0x3a: 0x3b08, // basefont
0x3f: 0x1303, // nav
0x40: 0x17704, // kind
0x41: 0x35708, // readonly
0x42: 0x30806, // mglyph
0x44: 0xb202, // li
0x46: 0x2d506, // hidden
0x47: 0x70e03, // svg
0x48: 0x58304, // step
0x49: 0x23f09, // integrity
0x4a: 0x58606, // public
0x4c: 0x1ab03, // col
0x4d: 0x1870a, // blockquote
0x4e: 0x34f02, // h5
0x50: 0x5b908, // progress
0x51: 0x5f505, // sizes
0x52: 0x34502, // h4
0x56: 0x33005, // thead
0x57: 0xd607, // keytype
0x58: 0x5b70a, // onprogress
0x59: 0x44b09, // inputmode
0x5a: 0x3b109, // ondragend
0x5d: 0x3a205, // oncut
0x5e: 0x43706, // spacer
0x5f: 0x1ab08, // colgroup
0x62: 0x16502, // is
0x65: 0x3c02, // as
0x66: 0x54809, // onoffline
0x67: 0x33706, // sorted
0x69: 0x48d10, // onlanguagechange
0x6c: 0x43d0c, // onhashchange
0x6d: 0x9604, // name
0x6e: 0xf505, // tfoot
0x6f: 0x56104, // desc
0x70: 0x33d03, // max
0x72: 0x1ea06, // coords
0x73: 0x30d02, // h3
0x74: 0x6e70e, // onbeforeunload
0x75: 0x9c04, // rows
0x76: 0x63c06, // select
0x77: 0x9805, // meter
0x78: 0x38b06, // itemid
0x79: 0x53c0c, // onmousewheel
0x7a: 0x5c006, // srcdoc
0x7d: 0x1ba05, // track
0x7f: 0x31f08, // itemtype
0x82: 0xa402, // mo
0x83: 0x41b08, // onchange
0x84: 0x33107, // headers
0x85: 0x5cc0c, // onratechange
0x86: 0x60819, // onsecuritypolicyviolation
0x88: 0x4a508, // datalist
0x89: 0x4e80b, // onmousedown
0x8a: 0x1ef04, // slot
0x8b: 0x4b010, // onloadedmetadata
0x8c: 0x1a06, // accept
0x8d: 0x26806, // object
0x91: 0x6b30e, // onvolumechange
0x92: 0x2107, // charset
0x93: 0x27613, // onautocompleteerror
0x94: 0xc113, // allowpaymentrequest
0x95: 0x2804, // body
0x96: 0x10a07, // default
0x97: 0x63c08, // selected
0x98: 0x21e04, // face
0x99: 0x1e505, // shape
0x9b: 0x68408, // ontoggle
0x9e: 0x64b02, // dt
0x9f: 0xb604, // mark
0xa1: 0xb01, // u
0xa4: 0x6ab08, // onunload
0xa5: 0x5d04, // loop
0xa6: 0x16408, // disabled
0xaa: 0x42307, // onended
0xab: 0xb00a, // malignmark
0xad: 0x67b09, // onsuspend
0xae: 0x35105, // mtext
0xaf: 0x64f06, // onsort
0xb0: 0x19d08, // itemprop
0xb3: 0x67109, // itemscope
0xb4: 0x17305, // blink
0xb6: 0x3b106, // ondrag
0xb7: 0xa702, // ul
0xb8: 0x26e04, // form
0xb9: 0x12907, // sandbox
0xba: 0x8b05, // frame
0xbb: 0x1505, // value
0xbc: 0x66209, // onstorage
0xbf: 0xaa07, // acronym
0xc0: 0x19a02, // rt
0xc2: 0x202, // br
0xc3: 0x22608, // fieldset
0xc4: 0x2900d, // typemustmatch
0xc5: 0xa208, // nomodule
0xc6: 0x6c07, // noembed
0xc7: 0x69e0d, // onbeforeprint
0xc8: 0x19106, // button
0xc9: 0x2f507, // onclick
0xca: 0x70407, // summary
0xcd: 0xfb04, // ruby
0xce: 0x56405, // class
0xcf: 0x3f40b, // ondragstart
0xd0: 0x23107, // caption
0xd4: 0xdd0e, // allowusermedia
0xd5: 0x4cf0b, // onloadstart
0xd9: 0x16b03, // div
0xda: 0x4a904, // list
0xdb: 0x32e04, // math
0xdc: 0x44b05, // input
0xdf: 0x3ea0a, // ondragover
0xe0: 0x2de02, // h2
0xe2: 0x1b209, // plaintext
0xe4: 0x4f30c, // onmouseenter
0xe7: 0x47907, // checked
0xe8: 0x47003, // pre
0xea: 0x35f08, // multiple
0xeb: 0xba03, // bdi
0xec: 0x33d09, // maxlength
0xed: 0xcf01, // q
0xee: 0x61f0a, // onauxclick
0xf0: 0x57c03, // wbr
0xf2: 0x3b04, // base
0xf3: 0x6e306, // option
0xf5: 0x41310, // ondurationchange
0xf7: 0x8908, // noframes
0xf9: 0x40508, // dropzone
0xfb: 0x67505, // scope
0xfc: 0x8008, // reversed
0xfd: 0x3ba0b, // ondragenter
0xfe: 0x3fa05, // start
0xff: 0x12f03, // xmp
0x100: 0x5f907, // srclang
0x101: 0x30703, // img
0x104: 0x101, // b
0x105: 0x25403, // for
0x106: 0x10705, // aside
0x107: 0x44907, // oninput
0x108: 0x35604, // area
0x109: 0x2a40a, // formmethod
0x10a: 0x72604, // wrap
0x10c: 0x23c02, // rp
0x10d: 0x46b0a, // onkeypress
0x10e: 0x6802, // tt
0x110: 0x34702, // mi
0x111: 0x36705, // muted
0x112: 0xf303, // alt
0x113: 0x5c504, // code
0x114: 0x6e02, // em
0x115: 0x3c50a, // ondragexit
0x117: 0x9f04, // span
0x119: 0x6d708, // manifest
0x11a: 0x38708, // menuitem
0x11b: 0x58b07, // content
0x11d: 0x6c109, // onwaiting
0x11f: 0x4c609, // onloadend
0x121: 0x37e0d, // oncontextmenu
0x123: 0x56d06, // onblur
0x124: 0x3fc07, // article
0x125: 0x9303, // dir
0x126: 0xef04, // ping
0x127: 0x24c08, // required
0x128: 0x45509, // oninvalid
0x129: 0xb105, // align
0x12b: 0x58a04, // icon
0x12c: 0x64d02, // h6
0x12d: 0x1c404, // cols
0x12e: 0x22e0a, // figcaption
0x12f: 0x45e09, // onkeydown
0x130: 0x66b08, // onsubmit
0x131: 0x14d09, // oncanplay
0x132: 0x70b03, // sup
0x133: 0xc01, // p
0x135: 0x40a09, // onemptied
0x136: 0x39106, // oncopy
0x137: 0x19c04, // cite
0x138: 0x3a70a, // ondblclick
0x13a: 0x50b0b, // onmousemove
0x13c: 0x66d03, // sub
0x13d: 0x48703, // rel
0x13e: 0x5f08, // optgroup
0x142: 0x9c07, // rowspan
0x143: 0x37806, // source
0x144: 0x21608, // noscript
0x145: 0x1a304, // open
0x146: 0x20403, // ins
0x147: 0x2540d, // foreignObject
0x148: 0x5ad0a, // onpopstate
0x14a: 0x28d07, // enctype
0x14b: 0x2760e, // onautocomplete
0x14c: 0x35208, // textarea
0x14e: 0x2780c, // autocomplete
0x14f: 0x15702, // hr
0x150: 0x1de08, // controls
0x151: 0x10902, // id
0x153: 0x2360c, // onafterprint
0x155: 0x2610d, // foreignobject
0x156: 0x32707, // marquee
0x157: 0x59a07, // onpause
0x158: 0x5e602, // dl
0x159: 0x5206, // height
0x15a: 0x34703, // min
0x15b: 0x9307, // dirname
0x15c: 0x1f209, // translate
0x15d: 0x5604, // html
0x15e: 0x34709, // minlength
0x15f: 0x48607, // preload
0x160: 0x71408, // template
0x161: 0x3df0b, // ondragleave
0x162: 0x3a02, // rb
0x164: 0x5c003, // src
0x165: 0x6dd06, // strong
0x167: 0x7804, // samp
0x168: 0x6f307, // address
0x169: 0x55108, // ononline
0x16b: 0x1310b, // placeholder
0x16c: 0x2c406, // target
0x16d: 0x20605, // small
0x16e: 0x6ca07, // onwheel
0x16f: 0x1c90a, // annotation
0x170: 0x4740a, // spellcheck
0x171: 0x7207, // details
0x172: 0x10306, // canvas
0x173: 0x12109, // autofocus
0x174: 0xc05, // param
0x176: 0x46308, // download
0x177: 0x45203, // del
0x178: 0x36c07, // onclose
0x179: 0xb903, // kbd
0x17a: 0x31906, // applet
0x17b: 0x2e004, // href
0x17c: 0x5f108, // onresize
0x17e: 0x49d0c, // onloadeddata
0x180: 0xcc02, // tr
0x181: 0x2c00a, // formtarget
0x182: 0x11005, // title
0x183: 0x6ff05, // style
0x184: 0xd206, // strike
0x185: 0x59e06, // usemap
0x186: 0x2fc06, // iframe
0x187: 0x1004, // main
0x189: 0x7b07, // picture
0x18c: 0x31605, // ismap
0x18e: 0x4a504, // data
0x18f: 0x5905, // label
0x191: 0x3d10e, // referrerpolicy
0x192: 0x15602, // th
0x194: 0x53606, // prompt
0x195: 0x56807, // section
0x197: 0x6d107, // optimum
0x198: 0x2db04, // high
0x199: 0x15c02, // h1
0x19a: 0x65909, // onstalled
0x19b: 0x16d03, // var
0x19c: 0x4204, // time
0x19e: 0x67402, // ms
0x19f: 0x33106, // header
0x1a0: 0x4da09, // onmessage
0x1a1: 0x1a605, // nonce
0x1a2: 0x26e0a, // formaction
0x1a3: 0x22006, // center
0x1a4: 0x3704, // nobr
0x1a5: 0x59505, // table
0x1a6: 0x4a907, // listing
0x1a7: 0x18106, // legend
0x1a9: 0x29b09, // challenge
0x1aa: 0x24806, // figure
0x1ab: 0xe605, // media
0x1ae: 0xd904, // type
0x1af: 0x3f04, // font
0x1b0: 0x4da0e, // onmessageerror
0x1b1: 0x37108, // seamless
0x1b2: 0x8703, // dfn
0x1b3: 0x5c705, // defer
0x1b4: 0xc303, // low
0x1b5: 0x19a03, // rtc
0x1b6: 0x5230b, // onmouseover
0x1b7: 0x2b20a, // novalidate
0x1b8: 0x71c0a, // workertype
0x1ba: 0x3cd07, // itemref
0x1bd: 0x1, // a
0x1be: 0x31803, // map
0x1bf: 0x400c, // ontimeupdate
0x1c0: 0x15e07, // bgsound
0x1c1: 0x3206, // keygen
0x1c2: 0x2705, // tbody
0x1c5: 0x64406, // onshow
0x1c7: 0x2501, // s
0x1c8: 0x6607, // pattern
0x1cc: 0x14d10, // oncanplaythrough
0x1ce: 0x2d702, // dd
0x1cf: 0x6f906, // srcset
0x1d0: 0x17003, // big
0x1d2: 0x65108, // sortable
0x1d3: 0x48007, // onkeyup
0x1d5: 0x5a406, // onplay
0x1d7: 0x4b804, // meta
0x1d8: 0x40306, // ondrop
0x1da: 0x60008, // onscroll
0x1db: 0x1fb0b, // crossorigin
0x1dc: 0x5730a, // onpageshow
0x1dd: 0x4, // abbr
0x1de: 0x9202, // td
0x1df: 0x58b0f, // contenteditable
0x1e0: 0x27206, // action
0x1e1: 0x1400b, // playsinline
0x1e2: 0x43107, // onfocus
0x1e3: 0x2e008, // hreflang
0x1e5: 0x5160a, // onmouseout
0x1e6: 0x5ea07, // onreset
0x1e7: 0x13c08, // autoplay
0x1e8: 0x63109, // onseeking
0x1ea: 0x67506, // scoped
0x1ec: 0x30a, // radiogroup
0x1ee: 0x3800b, // contextmenu
0x1ef: 0x52e09, // onmouseup
0x1f1: 0x2ca06, // hgroup
0x1f2: 0x2080f, // allowfullscreen
0x1f3: 0x4be08, // tabindex
0x1f6: 0x30f07, // isindex
0x1f7: 0x1a0e, // accept-charset
0x1f8: 0x2ae0e, // formnovalidate
0x1fb: 0x1c90e, // annotation-xml
0x1fc: 0x6e05, // embed
0x1fd: 0x21806, // script
0x1fe: 0xbb06, // dialog
0x1ff: 0x1d707, // command
}
const atomText = "abbradiogrouparamainavalueaccept-charsetbodyaccesskeygenobrb" +
"asefontimeupdateviacacheightmlabelooptgroupatternoembedetail" +
"sampictureversedfnoframesetdirnameterowspanomoduleacronymali" +
"gnmarkbdialogallowpaymentrequestrikeytypeallowusermediagroup" +
"ingaltfooterubyasyncanvasidefaultitleaudioncancelautofocusan" +
"dboxmplaceholderautoplaysinlinebdoncanplaythrough1bgsoundisa" +
"bledivarbigblinkindraggablegendblockquotebuttonabortcitempro" +
"penoncecolgrouplaintextrackcolorcolspannotation-xmlcommandco" +
"ntrolshapecoordslotranslatecrossoriginsmallowfullscreenoscri" +
"ptfacenterfieldsetfigcaptionafterprintegrityfigurequiredfore" +
"ignObjectforeignobjectformactionautocompleteerrorformenctype" +
"mustmatchallengeformmethodformnovalidatetimeformtargethgroup" +
"osterhiddenhigh2hreflanghttp-equivideonclickiframeimageimgly" +
"ph3isindexismappletitemtypemarqueematheadersortedmaxlength4m" +
"inlength5mtextareadonlymultiplemutedoncloseamlessourceoncont" +
"extmenuitemidoncopyoncuechangeoncutondblclickondragendondrag" +
"enterondragexitemreferrerpolicyondragleaveondragoverondragst" +
"articleondropzonemptiedondurationchangeonendedonerroronfocus" +
"paceronhashchangeoninputmodeloninvalidonkeydownloadonkeypres" +
"spellcheckedonkeyupreloadonlanguagechangeonloadeddatalisting" +
"onloadedmetadatabindexonloadendonloadstartonmessageerroronmo" +
"usedownonmouseenteronmouseleaveonmousemoveonmouseoutputonmou" +
"seoveronmouseupromptonmousewheelonofflineononlineonpagehides" +
"classectionbluronpageshowbronpastepublicontenteditableonpaus" +
"emaponplayingonpopstateonprogressrcdocodeferonratechangeonre" +
"jectionhandledonresetonresizesrclangonscrollonsecuritypolicy" +
"violationauxclickonseekedonseekingonselectedonshowidth6onsor" +
"tableonstalledonstorageonsubmitemscopedonsuspendontoggleonun" +
"handledrejectionbeforeprintonunloadonvolumechangeonwaitingon" +
"wheeloptimumanifestrongoptionbeforeunloaddressrcsetstylesumm" +
"arysupsvgsystemplateworkertypewrap"

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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package charset provides common text encodings for HTML documents.
//
// The mapping from encoding labels to encodings is defined at
// https://encoding.spec.whatwg.org/.
package charset // import "golang.org/x/net/html/charset"
import (
"bytes"
"fmt"
"io"
"mime"
"strings"
"unicode/utf8"
"golang.org/x/net/html"
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/charmap"
"golang.org/x/text/encoding/htmlindex"
"golang.org/x/text/transform"
)
// Lookup returns the encoding with the specified label, and its canonical
// name. It returns nil and the empty string if label is not one of the
// standard encodings for HTML. Matching is case-insensitive and ignores
// leading and trailing whitespace. Encoders will use HTML escape sequences for
// runes that are not supported by the character set.
func Lookup(label string) (e encoding.Encoding, name string) {
e, err := htmlindex.Get(label)
if err != nil {
return nil, ""
}
name, _ = htmlindex.Name(e)
return &htmlEncoding{e}, name
}
type htmlEncoding struct{ encoding.Encoding }
func (h *htmlEncoding) NewEncoder() *encoding.Encoder {
// HTML requires a non-terminating legacy encoder. We use HTML escapes to
// substitute unsupported code points.
return encoding.HTMLEscapeUnsupported(h.Encoding.NewEncoder())
}
// DetermineEncoding determines the encoding of an HTML document by examining
// up to the first 1024 bytes of content and the declared Content-Type.
//
// See http://www.whatwg.org/specs/web-apps/current-work/multipage/parsing.html#determining-the-character-encoding
func DetermineEncoding(content []byte, contentType string) (e encoding.Encoding, name string, certain bool) {
if len(content) > 1024 {
content = content[:1024]
}
for _, b := range boms {
if bytes.HasPrefix(content, b.bom) {
e, name = Lookup(b.enc)
return e, name, true
}
}
if _, params, err := mime.ParseMediaType(contentType); err == nil {
if cs, ok := params["charset"]; ok {
if e, name = Lookup(cs); e != nil {
return e, name, true
}
}
}
if len(content) > 0 {
e, name = prescan(content)
if e != nil {
return e, name, false
}
}
// Try to detect UTF-8.
// First eliminate any partial rune at the end.
for i := len(content) - 1; i >= 0 && i > len(content)-4; i-- {
b := content[i]
if b < 0x80 {
break
}
if utf8.RuneStart(b) {
content = content[:i]
break
}
}
hasHighBit := false
for _, c := range content {
if c >= 0x80 {
hasHighBit = true
break
}
}
if hasHighBit && utf8.Valid(content) {
return encoding.Nop, "utf-8", false
}
// TODO: change default depending on user's locale?
return charmap.Windows1252, "windows-1252", false
}
// NewReader returns an io.Reader that converts the content of r to UTF-8.
// It calls DetermineEncoding to find out what r's encoding is.
func NewReader(r io.Reader, contentType string) (io.Reader, error) {
preview := make([]byte, 1024)
n, err := io.ReadFull(r, preview)
switch {
case err == io.ErrUnexpectedEOF:
preview = preview[:n]
r = bytes.NewReader(preview)
case err != nil:
return nil, err
default:
r = io.MultiReader(bytes.NewReader(preview), r)
}
if e, _, _ := DetermineEncoding(preview, contentType); e != encoding.Nop {
r = transform.NewReader(r, e.NewDecoder())
}
return r, nil
}
// NewReaderLabel returns a reader that converts from the specified charset to
// UTF-8. It uses Lookup to find the encoding that corresponds to label, and
// returns an error if Lookup returns nil. It is suitable for use as
// encoding/xml.Decoder's CharsetReader function.
func NewReaderLabel(label string, input io.Reader) (io.Reader, error) {
e, _ := Lookup(label)
if e == nil {
return nil, fmt.Errorf("unsupported charset: %q", label)
}
return transform.NewReader(input, e.NewDecoder()), nil
}
func prescan(content []byte) (e encoding.Encoding, name string) {
z := html.NewTokenizer(bytes.NewReader(content))
for {
switch z.Next() {
case html.ErrorToken:
return nil, ""
case html.StartTagToken, html.SelfClosingTagToken:
tagName, hasAttr := z.TagName()
if !bytes.Equal(tagName, []byte("meta")) {
continue
}
attrList := make(map[string]bool)
gotPragma := false
const (
dontKnow = iota
doNeedPragma
doNotNeedPragma
)
needPragma := dontKnow
name = ""
e = nil
for hasAttr {
var key, val []byte
key, val, hasAttr = z.TagAttr()
ks := string(key)
if attrList[ks] {
continue
}
attrList[ks] = true
for i, c := range val {
if 'A' <= c && c <= 'Z' {
val[i] = c + 0x20
}
}
switch ks {
case "http-equiv":
if bytes.Equal(val, []byte("content-type")) {
gotPragma = true
}
case "content":
if e == nil {
name = fromMetaElement(string(val))
if name != "" {
e, name = Lookup(name)
if e != nil {
needPragma = doNeedPragma
}
}
}
case "charset":
e, name = Lookup(string(val))
needPragma = doNotNeedPragma
}
}
if needPragma == dontKnow || needPragma == doNeedPragma && !gotPragma {
continue
}
if strings.HasPrefix(name, "utf-16") {
name = "utf-8"
e = encoding.Nop
}
if e != nil {
return e, name
}
}
}
}
func fromMetaElement(s string) string {
for s != "" {
csLoc := strings.Index(s, "charset")
if csLoc == -1 {
return ""
}
s = s[csLoc+len("charset"):]
s = strings.TrimLeft(s, " \t\n\f\r")
if !strings.HasPrefix(s, "=") {
continue
}
s = s[1:]
s = strings.TrimLeft(s, " \t\n\f\r")
if s == "" {
return ""
}
if q := s[0]; q == '"' || q == '\'' {
s = s[1:]
closeQuote := strings.IndexRune(s, rune(q))
if closeQuote == -1 {
return ""
}
return s[:closeQuote]
}
end := strings.IndexAny(s, "; \t\n\f\r")
if end == -1 {
end = len(s)
}
return s[:end]
}
return ""
}
var boms = []struct {
bom []byte
enc string
}{
{[]byte{0xfe, 0xff}, "utf-16be"},
{[]byte{0xff, 0xfe}, "utf-16le"},
{[]byte{0xef, 0xbb, 0xbf}, "utf-8"},
}

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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package html
// Section 12.2.4.2 of the HTML5 specification says "The following elements
// have varying levels of special parsing rules".
// https://html.spec.whatwg.org/multipage/syntax.html#the-stack-of-open-elements
var isSpecialElementMap = map[string]bool{
"address": true,
"applet": true,
"area": true,
"article": true,
"aside": true,
"base": true,
"basefont": true,
"bgsound": true,
"blockquote": true,
"body": true,
"br": true,
"button": true,
"caption": true,
"center": true,
"col": true,
"colgroup": true,
"dd": true,
"details": true,
"dir": true,
"div": true,
"dl": true,
"dt": true,
"embed": true,
"fieldset": true,
"figcaption": true,
"figure": true,
"footer": true,
"form": true,
"frame": true,
"frameset": true,
"h1": true,
"h2": true,
"h3": true,
"h4": true,
"h5": true,
"h6": true,
"head": true,
"header": true,
"hgroup": true,
"hr": true,
"html": true,
"iframe": true,
"img": true,
"input": true,
"keygen": true, // "keygen" has been removed from the spec, but are kept here for backwards compatibility.
"li": true,
"link": true,
"listing": true,
"main": true,
"marquee": true,
"menu": true,
"meta": true,
"nav": true,
"noembed": true,
"noframes": true,
"noscript": true,
"object": true,
"ol": true,
"p": true,
"param": true,
"plaintext": true,
"pre": true,
"script": true,
"section": true,
"select": true,
"source": true,
"style": true,
"summary": true,
"table": true,
"tbody": true,
"td": true,
"template": true,
"textarea": true,
"tfoot": true,
"th": true,
"thead": true,
"title": true,
"tr": true,
"track": true,
"ul": true,
"wbr": true,
"xmp": true,
}
func isSpecialElement(element *Node) bool {
switch element.Namespace {
case "", "html":
return isSpecialElementMap[element.Data]
case "math":
switch element.Data {
case "mi", "mo", "mn", "ms", "mtext", "annotation-xml":
return true
}
case "svg":
switch element.Data {
case "foreignObject", "desc", "title":
return true
}
}
return false
}

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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
/*
Package html implements an HTML5-compliant tokenizer and parser.
Tokenization is done by creating a Tokenizer for an io.Reader r. It is the
caller's responsibility to ensure that r provides UTF-8 encoded HTML.
z := html.NewTokenizer(r)
Given a Tokenizer z, the HTML is tokenized by repeatedly calling z.Next(),
which parses the next token and returns its type, or an error:
for {
tt := z.Next()
if tt == html.ErrorToken {
// ...
return ...
}
// Process the current token.
}
There are two APIs for retrieving the current token. The high-level API is to
call Token; the low-level API is to call Text or TagName / TagAttr. Both APIs
allow optionally calling Raw after Next but before Token, Text, TagName, or
TagAttr. In EBNF notation, the valid call sequence per token is:
Next {Raw} [ Token | Text | TagName {TagAttr} ]
Token returns an independent data structure that completely describes a token.
Entities (such as "&lt;") are unescaped, tag names and attribute keys are
lower-cased, and attributes are collected into a []Attribute. For example:
for {
if z.Next() == html.ErrorToken {
// Returning io.EOF indicates success.
return z.Err()
}
emitToken(z.Token())
}
The low-level API performs fewer allocations and copies, but the contents of
the []byte values returned by Text, TagName and TagAttr may change on the next
call to Next. For example, to extract an HTML page's anchor text:
depth := 0
for {
tt := z.Next()
switch tt {
case html.ErrorToken:
return z.Err()
case html.TextToken:
if depth > 0 {
// emitBytes should copy the []byte it receives,
// if it doesn't process it immediately.
emitBytes(z.Text())
}
case html.StartTagToken, html.EndTagToken:
tn, _ := z.TagName()
if len(tn) == 1 && tn[0] == 'a' {
if tt == html.StartTagToken {
depth++
} else {
depth--
}
}
}
}
Parsing is done by calling Parse with an io.Reader, which returns the root of
the parse tree (the document element) as a *Node. It is the caller's
responsibility to ensure that the Reader provides UTF-8 encoded HTML. For
example, to process each anchor node in depth-first order:
doc, err := html.Parse(r)
if err != nil {
// ...
}
for n := range doc.Descendants() {
if n.Type == html.ElementNode && n.Data == "a" {
// Do something with n...
}
}
The relevant specifications include:
https://html.spec.whatwg.org/multipage/syntax.html and
https://html.spec.whatwg.org/multipage/syntax.html#tokenization
# Security Considerations
Care should be taken when parsing and interpreting HTML, whether full documents
or fragments, within the framework of the HTML specification, especially with
regard to untrusted inputs.
This package provides both a tokenizer and a parser, which implement the
tokenization, and tokenization and tree construction stages of the WHATWG HTML
parsing specification respectively. While the tokenizer parses and normalizes
individual HTML tokens, only the parser constructs the DOM tree from the
tokenized HTML, as described in the tree construction stage of the
specification, dynamically modifying or extending the document's DOM tree.
If your use case requires semantically well-formed HTML documents, as defined by
the WHATWG specification, the parser should be used rather than the tokenizer.
In security contexts, if trust decisions are being made using the tokenized or
parsed content, the input must be re-serialized (for instance by using Render or
Token.String) in order for those trust decisions to hold, as the process of
tokenization or parsing may alter the content.
*/
package html // import "golang.org/x/net/html"
// The tokenization algorithm implemented by this package is not a line-by-line
// transliteration of the relatively verbose state-machine in the WHATWG
// specification. A more direct approach is used instead, where the program
// counter implies the state, such as whether it is tokenizing a tag or a text
// node. Specification compliance is verified by checking expected and actual
// outputs over a test suite rather than aiming for algorithmic fidelity.
// TODO(nigeltao): Does a DOM API belong in this package or a separate one?
// TODO(nigeltao): How does parsing interact with a JavaScript engine?

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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package html
import (
"strings"
)
// parseDoctype parses the data from a DoctypeToken into a name,
// public identifier, and system identifier. It returns a Node whose Type
// is DoctypeNode, whose Data is the name, and which has attributes
// named "system" and "public" for the two identifiers if they were present.
// quirks is whether the document should be parsed in "quirks mode".
func parseDoctype(s string) (n *Node, quirks bool) {
n = &Node{Type: DoctypeNode}
// Find the name.
space := strings.IndexAny(s, whitespace)
if space == -1 {
space = len(s)
}
n.Data = s[:space]
// The comparison to "html" is case-sensitive.
if n.Data != "html" {
quirks = true
}
n.Data = strings.ToLower(n.Data)
s = strings.TrimLeft(s[space:], whitespace)
if len(s) < 6 {
// It can't start with "PUBLIC" or "SYSTEM".
// Ignore the rest of the string.
return n, quirks || s != ""
}
key := strings.ToLower(s[:6])
s = s[6:]
for key == "public" || key == "system" {
s = strings.TrimLeft(s, whitespace)
if s == "" {
break
}
quote := s[0]
if quote != '"' && quote != '\'' {
break
}
s = s[1:]
q := strings.IndexRune(s, rune(quote))
var id string
if q == -1 {
id = s
s = ""
} else {
id = s[:q]
s = s[q+1:]
}
n.Attr = append(n.Attr, Attribute{Key: key, Val: id})
if key == "public" {
key = "system"
} else {
key = ""
}
}
if key != "" || s != "" {
quirks = true
} else if len(n.Attr) > 0 {
if n.Attr[0].Key == "public" {
public := strings.ToLower(n.Attr[0].Val)
switch public {
case "-//w3o//dtd w3 html strict 3.0//en//", "-/w3d/dtd html 4.0 transitional/en", "html":
quirks = true
default:
for _, q := range quirkyIDs {
if strings.HasPrefix(public, q) {
quirks = true
break
}
}
}
// The following two public IDs only cause quirks mode if there is no system ID.
if len(n.Attr) == 1 && (strings.HasPrefix(public, "-//w3c//dtd html 4.01 frameset//") ||
strings.HasPrefix(public, "-//w3c//dtd html 4.01 transitional//")) {
quirks = true
}
}
if lastAttr := n.Attr[len(n.Attr)-1]; lastAttr.Key == "system" &&
strings.EqualFold(lastAttr.Val, "http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd") {
quirks = true
}
}
return n, quirks
}
// quirkyIDs is a list of public doctype identifiers that cause a document
// to be interpreted in quirks mode. The identifiers should be in lower case.
var quirkyIDs = []string{
"+//silmaril//dtd html pro v0r11 19970101//",
"-//advasoft ltd//dtd html 3.0 aswedit + extensions//",
"-//as//dtd html 3.0 aswedit + extensions//",
"-//ietf//dtd html 2.0 level 1//",
"-//ietf//dtd html 2.0 level 2//",
"-//ietf//dtd html 2.0 strict level 1//",
"-//ietf//dtd html 2.0 strict level 2//",
"-//ietf//dtd html 2.0 strict//",
"-//ietf//dtd html 2.0//",
"-//ietf//dtd html 2.1e//",
"-//ietf//dtd html 3.0//",
"-//ietf//dtd html 3.2 final//",
"-//ietf//dtd html 3.2//",
"-//ietf//dtd html 3//",
"-//ietf//dtd html level 0//",
"-//ietf//dtd html level 1//",
"-//ietf//dtd html level 2//",
"-//ietf//dtd html level 3//",
"-//ietf//dtd html strict level 0//",
"-//ietf//dtd html strict level 1//",
"-//ietf//dtd html strict level 2//",
"-//ietf//dtd html strict level 3//",
"-//ietf//dtd html strict//",
"-//ietf//dtd html//",
"-//metrius//dtd metrius presentational//",
"-//microsoft//dtd internet explorer 2.0 html strict//",
"-//microsoft//dtd internet explorer 2.0 html//",
"-//microsoft//dtd internet explorer 2.0 tables//",
"-//microsoft//dtd internet explorer 3.0 html strict//",
"-//microsoft//dtd internet explorer 3.0 html//",
"-//microsoft//dtd internet explorer 3.0 tables//",
"-//netscape comm. corp.//dtd html//",
"-//netscape comm. corp.//dtd strict html//",
"-//o'reilly and associates//dtd html 2.0//",
"-//o'reilly and associates//dtd html extended 1.0//",
"-//o'reilly and associates//dtd html extended relaxed 1.0//",
"-//softquad software//dtd hotmetal pro 6.0::19990601::extensions to html 4.0//",
"-//softquad//dtd hotmetal pro 4.0::19971010::extensions to html 4.0//",
"-//spyglass//dtd html 2.0 extended//",
"-//sq//dtd html 2.0 hotmetal + extensions//",
"-//sun microsystems corp.//dtd hotjava html//",
"-//sun microsystems corp.//dtd hotjava strict html//",
"-//w3c//dtd html 3 1995-03-24//",
"-//w3c//dtd html 3.2 draft//",
"-//w3c//dtd html 3.2 final//",
"-//w3c//dtd html 3.2//",
"-//w3c//dtd html 3.2s draft//",
"-//w3c//dtd html 4.0 frameset//",
"-//w3c//dtd html 4.0 transitional//",
"-//w3c//dtd html experimental 19960712//",
"-//w3c//dtd html experimental 970421//",
"-//w3c//dtd w3 html//",
"-//w3o//dtd w3 html 3.0//",
"-//webtechs//dtd mozilla html 2.0//",
"-//webtechs//dtd mozilla html//",
}

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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package html
import (
"bytes"
"strings"
"unicode/utf8"
)
// These replacements permit compatibility with old numeric entities that
// assumed Windows-1252 encoding.
// https://html.spec.whatwg.org/multipage/syntax.html#consume-a-character-reference
var replacementTable = [...]rune{
'\u20AC', // First entry is what 0x80 should be replaced with.
'\u0081',
'\u201A',
'\u0192',
'\u201E',
'\u2026',
'\u2020',
'\u2021',
'\u02C6',
'\u2030',
'\u0160',
'\u2039',
'\u0152',
'\u008D',
'\u017D',
'\u008F',
'\u0090',
'\u2018',
'\u2019',
'\u201C',
'\u201D',
'\u2022',
'\u2013',
'\u2014',
'\u02DC',
'\u2122',
'\u0161',
'\u203A',
'\u0153',
'\u009D',
'\u017E',
'\u0178', // Last entry is 0x9F.
// 0x00->'\uFFFD' is handled programmatically.
// 0x0D->'\u000D' is a no-op.
}
// unescapeEntity reads an entity like "&lt;" from b[src:] and writes the
// corresponding "<" to b[dst:], returning the incremented dst and src cursors.
// Precondition: b[src] == '&' && dst <= src.
// attribute should be true if parsing an attribute value.
func unescapeEntity(b []byte, dst, src int, attribute bool) (dst1, src1 int) {
// https://html.spec.whatwg.org/multipage/syntax.html#consume-a-character-reference
// i starts at 1 because we already know that s[0] == '&'.
i, s := 1, b[src:]
if len(s) <= 1 {
b[dst] = b[src]
return dst + 1, src + 1
}
if s[i] == '#' {
if len(s) <= 3 { // We need to have at least "&#.".
b[dst] = b[src]
return dst + 1, src + 1
}
i++
c := s[i]
hex := false
if c == 'x' || c == 'X' {
hex = true
i++
}
x := '\x00'
for i < len(s) {
c = s[i]
i++
if hex {
if '0' <= c && c <= '9' {
x = 16*x + rune(c) - '0'
continue
} else if 'a' <= c && c <= 'f' {
x = 16*x + rune(c) - 'a' + 10
continue
} else if 'A' <= c && c <= 'F' {
x = 16*x + rune(c) - 'A' + 10
continue
}
} else if '0' <= c && c <= '9' {
x = 10*x + rune(c) - '0'
continue
}
if c != ';' {
i--
}
break
}
if i <= 3 { // No characters matched.
b[dst] = b[src]
return dst + 1, src + 1
}
if 0x80 <= x && x <= 0x9F {
// Replace characters from Windows-1252 with UTF-8 equivalents.
x = replacementTable[x-0x80]
} else if x == 0 || (0xD800 <= x && x <= 0xDFFF) || x > 0x10FFFF {
// Replace invalid characters with the replacement character.
x = '\uFFFD'
}
return dst + utf8.EncodeRune(b[dst:], x), src + i
}
// Consume the maximum number of characters possible, with the
// consumed characters matching one of the named references.
for i < len(s) {
c := s[i]
i++
// Lower-cased characters are more common in entities, so we check for them first.
if 'a' <= c && c <= 'z' || 'A' <= c && c <= 'Z' || '0' <= c && c <= '9' {
continue
}
if c != ';' {
i--
}
break
}
entityName := string(s[1:i])
if entityName == "" {
// No-op.
} else if attribute && entityName[len(entityName)-1] != ';' && len(s) > i && s[i] == '=' {
// No-op.
} else if x := entity[entityName]; x != 0 {
return dst + utf8.EncodeRune(b[dst:], x), src + i
} else if x := entity2[entityName]; x[0] != 0 {
dst1 := dst + utf8.EncodeRune(b[dst:], x[0])
return dst1 + utf8.EncodeRune(b[dst1:], x[1]), src + i
} else if !attribute {
maxLen := len(entityName) - 1
if maxLen > longestEntityWithoutSemicolon {
maxLen = longestEntityWithoutSemicolon
}
for j := maxLen; j > 1; j-- {
if x := entity[entityName[:j]]; x != 0 {
return dst + utf8.EncodeRune(b[dst:], x), src + j + 1
}
}
}
dst1, src1 = dst+i, src+i
copy(b[dst:dst1], b[src:src1])
return dst1, src1
}
// unescape unescapes b's entities in-place, so that "a&lt;b" becomes "a<b".
// attribute should be true if parsing an attribute value.
func unescape(b []byte, attribute bool) []byte {
for i, c := range b {
if c == '&' {
dst, src := unescapeEntity(b, i, i, attribute)
for src < len(b) {
c := b[src]
if c == '&' {
dst, src = unescapeEntity(b, dst, src, attribute)
} else {
b[dst] = c
dst, src = dst+1, src+1
}
}
return b[0:dst]
}
}
return b
}
// lower lower-cases the A-Z bytes in b in-place, so that "aBc" becomes "abc".
func lower(b []byte) []byte {
for i, c := range b {
if 'A' <= c && c <= 'Z' {
b[i] = c + 'a' - 'A'
}
}
return b
}
// escapeComment is like func escape but escapes its input bytes less often.
// Per https://github.com/golang/go/issues/58246 some HTML comments are (1)
// meaningful and (2) contain angle brackets that we'd like to avoid escaping
// unless we have to.
//
// "We have to" includes the '&' byte, since that introduces other escapes.
//
// It also includes those bytes (not including EOF) that would otherwise end
// the comment. Per the summary table at the bottom of comment_test.go, this is
// the '>' byte that, per above, we'd like to avoid escaping unless we have to.
//
// Studying the summary table (and T actions in its '>' column) closely, we
// only need to escape in states 43, 44, 49, 51 and 52. State 43 is at the
// start of the comment data. State 52 is after a '!'. The other three states
// are after a '-'.
//
// Our algorithm is thus to escape every '&' and to escape '>' if and only if:
// - The '>' is after a '!' or '-' (in the unescaped data) or
// - The '>' is at the start of the comment data (after the opening "<!--").
func escapeComment(w writer, s string) error {
// When modifying this function, consider manually increasing the
// maxSuffixLen constant in func TestComments, from 6 to e.g. 9 or more.
// That increase should only be temporary, not committed, as it
// exponentially affects the test running time.
if len(s) == 0 {
return nil
}
// Loop:
// - Grow j such that s[i:j] does not need escaping.
// - If s[j] does need escaping, output s[i:j] and an escaped s[j],
// resetting i and j to point past that s[j] byte.
i := 0
for j := 0; j < len(s); j++ {
escaped := ""
switch s[j] {
case '&':
escaped = "&amp;"
case '>':
if j > 0 {
if prev := s[j-1]; (prev != '!') && (prev != '-') {
continue
}
}
escaped = "&gt;"
default:
continue
}
if i < j {
if _, err := w.WriteString(s[i:j]); err != nil {
return err
}
}
if _, err := w.WriteString(escaped); err != nil {
return err
}
i = j + 1
}
if i < len(s) {
if _, err := w.WriteString(s[i:]); err != nil {
return err
}
}
return nil
}
// escapeCommentString is to EscapeString as escapeComment is to escape.
func escapeCommentString(s string) string {
if strings.IndexAny(s, "&>") == -1 {
return s
}
var buf bytes.Buffer
escapeComment(&buf, s)
return buf.String()
}
const escapedChars = "&'<>\"\r"
func escape(w writer, s string) error {
i := strings.IndexAny(s, escapedChars)
for i != -1 {
if _, err := w.WriteString(s[:i]); err != nil {
return err
}
var esc string
switch s[i] {
case '&':
esc = "&amp;"
case '\'':
// "&#39;" is shorter than "&apos;" and apos was not in HTML until HTML5.
esc = "&#39;"
case '<':
esc = "&lt;"
case '>':
esc = "&gt;"
case '"':
// "&#34;" is shorter than "&quot;".
esc = "&#34;"
case '\r':
esc = "&#13;"
default:
panic("unrecognized escape character")
}
s = s[i+1:]
if _, err := w.WriteString(esc); err != nil {
return err
}
i = strings.IndexAny(s, escapedChars)
}
_, err := w.WriteString(s)
return err
}
// EscapeString escapes special characters like "<" to become "&lt;". It
// escapes only five such characters: <, >, &, ' and ".
// UnescapeString(EscapeString(s)) == s always holds, but the converse isn't
// always true.
func EscapeString(s string) string {
if strings.IndexAny(s, escapedChars) == -1 {
return s
}
var buf bytes.Buffer
escape(&buf, s)
return buf.String()
}
// UnescapeString unescapes entities like "&lt;" to become "<". It unescapes a
// larger range of entities than EscapeString escapes. For example, "&aacute;"
// unescapes to "á", as does "&#225;" and "&xE1;".
// UnescapeString(EscapeString(s)) == s always holds, but the converse isn't
// always true.
func UnescapeString(s string) string {
for _, c := range s {
if c == '&' {
return string(unescape([]byte(s), false))
}
}
return s
}

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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package html
import (
"strings"
)
func adjustAttributeNames(aa []Attribute, nameMap map[string]string) {
for i := range aa {
if newName, ok := nameMap[aa[i].Key]; ok {
aa[i].Key = newName
}
}
}
func adjustForeignAttributes(aa []Attribute) {
for i, a := range aa {
if a.Key == "" || a.Key[0] != 'x' {
continue
}
switch a.Key {
case "xlink:actuate", "xlink:arcrole", "xlink:href", "xlink:role", "xlink:show",
"xlink:title", "xlink:type", "xml:base", "xml:lang", "xml:space", "xmlns:xlink":
j := strings.Index(a.Key, ":")
aa[i].Namespace = a.Key[:j]
aa[i].Key = a.Key[j+1:]
}
}
}
func htmlIntegrationPoint(n *Node) bool {
if n.Type != ElementNode {
return false
}
switch n.Namespace {
case "math":
if n.Data == "annotation-xml" {
for _, a := range n.Attr {
if a.Key == "encoding" {
if strings.EqualFold(a.Val, "text/html") || strings.EqualFold(a.Val, "application/xhtml+xml") {
return true
}
}
}
}
case "svg":
switch n.Data {
case "desc", "foreignObject", "title":
return true
}
}
return false
}
func mathMLTextIntegrationPoint(n *Node) bool {
if n.Namespace != "math" {
return false
}
switch n.Data {
case "mi", "mo", "mn", "ms", "mtext":
return true
}
return false
}
// Section 12.2.6.5.
var breakout = map[string]bool{
"b": true,
"big": true,
"blockquote": true,
"body": true,
"br": true,
"center": true,
"code": true,
"dd": true,
"div": true,
"dl": true,
"dt": true,
"em": true,
"embed": true,
"h1": true,
"h2": true,
"h3": true,
"h4": true,
"h5": true,
"h6": true,
"head": true,
"hr": true,
"i": true,
"img": true,
"li": true,
"listing": true,
"menu": true,
"meta": true,
"nobr": true,
"ol": true,
"p": true,
"pre": true,
"ruby": true,
"s": true,
"small": true,
"span": true,
"strong": true,
"strike": true,
"sub": true,
"sup": true,
"table": true,
"tt": true,
"u": true,
"ul": true,
"var": true,
}
// Section 12.2.6.5.
var svgTagNameAdjustments = map[string]string{
"altglyph": "altGlyph",
"altglyphdef": "altGlyphDef",
"altglyphitem": "altGlyphItem",
"animatecolor": "animateColor",
"animatemotion": "animateMotion",
"animatetransform": "animateTransform",
"clippath": "clipPath",
"feblend": "feBlend",
"fecolormatrix": "feColorMatrix",
"fecomponenttransfer": "feComponentTransfer",
"fecomposite": "feComposite",
"feconvolvematrix": "feConvolveMatrix",
"fediffuselighting": "feDiffuseLighting",
"fedisplacementmap": "feDisplacementMap",
"fedistantlight": "feDistantLight",
"feflood": "feFlood",
"fefunca": "feFuncA",
"fefuncb": "feFuncB",
"fefuncg": "feFuncG",
"fefuncr": "feFuncR",
"fegaussianblur": "feGaussianBlur",
"feimage": "feImage",
"femerge": "feMerge",
"femergenode": "feMergeNode",
"femorphology": "feMorphology",
"feoffset": "feOffset",
"fepointlight": "fePointLight",
"fespecularlighting": "feSpecularLighting",
"fespotlight": "feSpotLight",
"fetile": "feTile",
"feturbulence": "feTurbulence",
"foreignobject": "foreignObject",
"glyphref": "glyphRef",
"lineargradient": "linearGradient",
"radialgradient": "radialGradient",
"textpath": "textPath",
}
// Section 12.2.6.1
var mathMLAttributeAdjustments = map[string]string{
"definitionurl": "definitionURL",
}
var svgAttributeAdjustments = map[string]string{
"attributename": "attributeName",
"attributetype": "attributeType",
"basefrequency": "baseFrequency",
"baseprofile": "baseProfile",
"calcmode": "calcMode",
"clippathunits": "clipPathUnits",
"diffuseconstant": "diffuseConstant",
"edgemode": "edgeMode",
"filterunits": "filterUnits",
"glyphref": "glyphRef",
"gradienttransform": "gradientTransform",
"gradientunits": "gradientUnits",
"kernelmatrix": "kernelMatrix",
"kernelunitlength": "kernelUnitLength",
"keypoints": "keyPoints",
"keysplines": "keySplines",
"keytimes": "keyTimes",
"lengthadjust": "lengthAdjust",
"limitingconeangle": "limitingConeAngle",
"markerheight": "markerHeight",
"markerunits": "markerUnits",
"markerwidth": "markerWidth",
"maskcontentunits": "maskContentUnits",
"maskunits": "maskUnits",
"numoctaves": "numOctaves",
"pathlength": "pathLength",
"patterncontentunits": "patternContentUnits",
"patterntransform": "patternTransform",
"patternunits": "patternUnits",
"pointsatx": "pointsAtX",
"pointsaty": "pointsAtY",
"pointsatz": "pointsAtZ",
"preservealpha": "preserveAlpha",
"preserveaspectratio": "preserveAspectRatio",
"primitiveunits": "primitiveUnits",
"refx": "refX",
"refy": "refY",
"repeatcount": "repeatCount",
"repeatdur": "repeatDur",
"requiredextensions": "requiredExtensions",
"requiredfeatures": "requiredFeatures",
"specularconstant": "specularConstant",
"specularexponent": "specularExponent",
"spreadmethod": "spreadMethod",
"startoffset": "startOffset",
"stddeviation": "stdDeviation",
"stitchtiles": "stitchTiles",
"surfacescale": "surfaceScale",
"systemlanguage": "systemLanguage",
"tablevalues": "tableValues",
"targetx": "targetX",
"targety": "targetY",
"textlength": "textLength",
"viewbox": "viewBox",
"viewtarget": "viewTarget",
"xchannelselector": "xChannelSelector",
"ychannelselector": "yChannelSelector",
"zoomandpan": "zoomAndPan",
}

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// Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build go1.23
package html
import "iter"
// Ancestors returns an iterator over the ancestors of n, starting with n.Parent.
//
// Mutating a Node or its parents while iterating may have unexpected results.
func (n *Node) Ancestors() iter.Seq[*Node] {
_ = n.Parent // eager nil check
return func(yield func(*Node) bool) {
for p := n.Parent; p != nil && yield(p); p = p.Parent {
}
}
}
// ChildNodes returns an iterator over the immediate children of n,
// starting with n.FirstChild.
//
// Mutating a Node or its children while iterating may have unexpected results.
func (n *Node) ChildNodes() iter.Seq[*Node] {
_ = n.FirstChild // eager nil check
return func(yield func(*Node) bool) {
for c := n.FirstChild; c != nil && yield(c); c = c.NextSibling {
}
}
}
// Descendants returns an iterator over all nodes recursively beneath
// n, excluding n itself. Nodes are visited in depth-first preorder.
//
// Mutating a Node or its descendants while iterating may have unexpected results.
func (n *Node) Descendants() iter.Seq[*Node] {
_ = n.FirstChild // eager nil check
return func(yield func(*Node) bool) {
n.descendants(yield)
}
}
func (n *Node) descendants(yield func(*Node) bool) bool {
for c := range n.ChildNodes() {
if !yield(c) || !c.descendants(yield) {
return false
}
}
return true
}

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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package html
import (
"golang.org/x/net/html/atom"
)
// A NodeType is the type of a Node.
type NodeType uint32
const (
ErrorNode NodeType = iota
TextNode
DocumentNode
ElementNode
CommentNode
DoctypeNode
// RawNode nodes are not returned by the parser, but can be part of the
// Node tree passed to func Render to insert raw HTML (without escaping).
// If so, this package makes no guarantee that the rendered HTML is secure
// (from e.g. Cross Site Scripting attacks) or well-formed.
RawNode
scopeMarkerNode
)
// Section 12.2.4.3 says "The markers are inserted when entering applet,
// object, marquee, template, td, th, and caption elements, and are used
// to prevent formatting from "leaking" into applet, object, marquee,
// template, td, th, and caption elements".
var scopeMarker = Node{Type: scopeMarkerNode}
// A Node consists of a NodeType and some Data (tag name for element nodes,
// content for text) and are part of a tree of Nodes. Element nodes may also
// have a Namespace and contain a slice of Attributes. Data is unescaped, so
// that it looks like "a<b" rather than "a&lt;b". For element nodes, DataAtom
// is the atom for Data, or zero if Data is not a known tag name.
//
// Node trees may be navigated using the link fields (Parent,
// FirstChild, and so on) or a range loop over iterators such as
// [Node.Descendants].
//
// An empty Namespace implies a "http://www.w3.org/1999/xhtml" namespace.
// Similarly, "math" is short for "http://www.w3.org/1998/Math/MathML", and
// "svg" is short for "http://www.w3.org/2000/svg".
type Node struct {
Parent, FirstChild, LastChild, PrevSibling, NextSibling *Node
Type NodeType
DataAtom atom.Atom
Data string
Namespace string
Attr []Attribute
}
// InsertBefore inserts newChild as a child of n, immediately before oldChild
// in the sequence of n's children. oldChild may be nil, in which case newChild
// is appended to the end of n's children.
//
// It will panic if newChild already has a parent or siblings.
func (n *Node) InsertBefore(newChild, oldChild *Node) {
if newChild.Parent != nil || newChild.PrevSibling != nil || newChild.NextSibling != nil {
panic("html: InsertBefore called for an attached child Node")
}
var prev, next *Node
if oldChild != nil {
prev, next = oldChild.PrevSibling, oldChild
} else {
prev = n.LastChild
}
if prev != nil {
prev.NextSibling = newChild
} else {
n.FirstChild = newChild
}
if next != nil {
next.PrevSibling = newChild
} else {
n.LastChild = newChild
}
newChild.Parent = n
newChild.PrevSibling = prev
newChild.NextSibling = next
}
// AppendChild adds a node c as a child of n.
//
// It will panic if c already has a parent or siblings.
func (n *Node) AppendChild(c *Node) {
if c.Parent != nil || c.PrevSibling != nil || c.NextSibling != nil {
panic("html: AppendChild called for an attached child Node")
}
last := n.LastChild
if last != nil {
last.NextSibling = c
} else {
n.FirstChild = c
}
n.LastChild = c
c.Parent = n
c.PrevSibling = last
}
// RemoveChild removes a node c that is a child of n. Afterwards, c will have
// no parent and no siblings.
//
// It will panic if c's parent is not n.
func (n *Node) RemoveChild(c *Node) {
if c.Parent != n {
panic("html: RemoveChild called for a non-child Node")
}
if n.FirstChild == c {
n.FirstChild = c.NextSibling
}
if c.NextSibling != nil {
c.NextSibling.PrevSibling = c.PrevSibling
}
if n.LastChild == c {
n.LastChild = c.PrevSibling
}
if c.PrevSibling != nil {
c.PrevSibling.NextSibling = c.NextSibling
}
c.Parent = nil
c.PrevSibling = nil
c.NextSibling = nil
}
// reparentChildren reparents all of src's child nodes to dst.
func reparentChildren(dst, src *Node) {
for {
child := src.FirstChild
if child == nil {
break
}
src.RemoveChild(child)
dst.AppendChild(child)
}
}
// clone returns a new node with the same type, data and attributes.
// The clone has no parent, no siblings and no children.
func (n *Node) clone() *Node {
m := &Node{
Type: n.Type,
DataAtom: n.DataAtom,
Data: n.Data,
Attr: make([]Attribute, len(n.Attr)),
}
copy(m.Attr, n.Attr)
return m
}
// nodeStack is a stack of nodes.
type nodeStack []*Node
// pop pops the stack. It will panic if s is empty.
func (s *nodeStack) pop() *Node {
i := len(*s)
n := (*s)[i-1]
*s = (*s)[:i-1]
return n
}
// top returns the most recently pushed node, or nil if s is empty.
func (s *nodeStack) top() *Node {
if i := len(*s); i > 0 {
return (*s)[i-1]
}
return nil
}
// index returns the index of the top-most occurrence of n in the stack, or -1
// if n is not present.
func (s *nodeStack) index(n *Node) int {
for i := len(*s) - 1; i >= 0; i-- {
if (*s)[i] == n {
return i
}
}
return -1
}
// contains returns whether a is within s.
func (s *nodeStack) contains(a atom.Atom) bool {
for _, n := range *s {
if n.DataAtom == a && n.Namespace == "" {
return true
}
}
return false
}
// insert inserts a node at the given index.
func (s *nodeStack) insert(i int, n *Node) {
(*s) = append(*s, nil)
copy((*s)[i+1:], (*s)[i:])
(*s)[i] = n
}
// remove removes a node from the stack. It is a no-op if n is not present.
func (s *nodeStack) remove(n *Node) {
i := s.index(n)
if i == -1 {
return
}
copy((*s)[i:], (*s)[i+1:])
j := len(*s) - 1
(*s)[j] = nil
*s = (*s)[:j]
}
type insertionModeStack []insertionMode
func (s *insertionModeStack) pop() (im insertionMode) {
i := len(*s)
im = (*s)[i-1]
*s = (*s)[:i-1]
return im
}
func (s *insertionModeStack) top() insertionMode {
if i := len(*s); i > 0 {
return (*s)[i-1]
}
return nil
}

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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package html
import (
"bufio"
"errors"
"fmt"
"io"
"strings"
)
type writer interface {
io.Writer
io.ByteWriter
WriteString(string) (int, error)
}
// Render renders the parse tree n to the given writer.
//
// Rendering is done on a 'best effort' basis: calling Parse on the output of
// Render will always result in something similar to the original tree, but it
// is not necessarily an exact clone unless the original tree was 'well-formed'.
// 'Well-formed' is not easily specified; the HTML5 specification is
// complicated.
//
// Calling Parse on arbitrary input typically results in a 'well-formed' parse
// tree. However, it is possible for Parse to yield a 'badly-formed' parse tree.
// For example, in a 'well-formed' parse tree, no <a> element is a child of
// another <a> element: parsing "<a><a>" results in two sibling elements.
// Similarly, in a 'well-formed' parse tree, no <a> element is a child of a
// <table> element: parsing "<p><table><a>" results in a <p> with two sibling
// children; the <a> is reparented to the <table>'s parent. However, calling
// Parse on "<a><table><a>" does not return an error, but the result has an <a>
// element with an <a> child, and is therefore not 'well-formed'.
//
// Programmatically constructed trees are typically also 'well-formed', but it
// is possible to construct a tree that looks innocuous but, when rendered and
// re-parsed, results in a different tree. A simple example is that a solitary
// text node would become a tree containing <html>, <head> and <body> elements.
// Another example is that the programmatic equivalent of "a<head>b</head>c"
// becomes "<html><head><head/><body>abc</body></html>".
func Render(w io.Writer, n *Node) error {
if x, ok := w.(writer); ok {
return render(x, n)
}
buf := bufio.NewWriter(w)
if err := render(buf, n); err != nil {
return err
}
return buf.Flush()
}
// plaintextAbort is returned from render1 when a <plaintext> element
// has been rendered. No more end tags should be rendered after that.
var plaintextAbort = errors.New("html: internal error (plaintext abort)")
func render(w writer, n *Node) error {
err := render1(w, n)
if err == plaintextAbort {
err = nil
}
return err
}
func render1(w writer, n *Node) error {
// Render non-element nodes; these are the easy cases.
switch n.Type {
case ErrorNode:
return errors.New("html: cannot render an ErrorNode node")
case TextNode:
return escape(w, n.Data)
case DocumentNode:
for c := n.FirstChild; c != nil; c = c.NextSibling {
if err := render1(w, c); err != nil {
return err
}
}
return nil
case ElementNode:
// No-op.
case CommentNode:
if _, err := w.WriteString("<!--"); err != nil {
return err
}
if err := escapeComment(w, n.Data); err != nil {
return err
}
if _, err := w.WriteString("-->"); err != nil {
return err
}
return nil
case DoctypeNode:
if _, err := w.WriteString("<!DOCTYPE "); err != nil {
return err
}
if err := escape(w, n.Data); err != nil {
return err
}
if n.Attr != nil {
var p, s string
for _, a := range n.Attr {
switch a.Key {
case "public":
p = a.Val
case "system":
s = a.Val
}
}
if p != "" {
if _, err := w.WriteString(" PUBLIC "); err != nil {
return err
}
if err := writeQuoted(w, p); err != nil {
return err
}
if s != "" {
if err := w.WriteByte(' '); err != nil {
return err
}
if err := writeQuoted(w, s); err != nil {
return err
}
}
} else if s != "" {
if _, err := w.WriteString(" SYSTEM "); err != nil {
return err
}
if err := writeQuoted(w, s); err != nil {
return err
}
}
}
return w.WriteByte('>')
case RawNode:
_, err := w.WriteString(n.Data)
return err
default:
return errors.New("html: unknown node type")
}
// Render the <xxx> opening tag.
if err := w.WriteByte('<'); err != nil {
return err
}
if _, err := w.WriteString(n.Data); err != nil {
return err
}
for _, a := range n.Attr {
if err := w.WriteByte(' '); err != nil {
return err
}
if a.Namespace != "" {
if _, err := w.WriteString(a.Namespace); err != nil {
return err
}
if err := w.WriteByte(':'); err != nil {
return err
}
}
if _, err := w.WriteString(a.Key); err != nil {
return err
}
if _, err := w.WriteString(`="`); err != nil {
return err
}
if err := escape(w, a.Val); err != nil {
return err
}
if err := w.WriteByte('"'); err != nil {
return err
}
}
if voidElements[n.Data] {
if n.FirstChild != nil {
return fmt.Errorf("html: void element <%s> has child nodes", n.Data)
}
_, err := w.WriteString("/>")
return err
}
if err := w.WriteByte('>'); err != nil {
return err
}
// Add initial newline where there is danger of a newline beging ignored.
if c := n.FirstChild; c != nil && c.Type == TextNode && strings.HasPrefix(c.Data, "\n") {
switch n.Data {
case "pre", "listing", "textarea":
if err := w.WriteByte('\n'); err != nil {
return err
}
}
}
// Render any child nodes
if childTextNodesAreLiteral(n) {
for c := n.FirstChild; c != nil; c = c.NextSibling {
if c.Type == TextNode {
if _, err := w.WriteString(c.Data); err != nil {
return err
}
} else {
if err := render1(w, c); err != nil {
return err
}
}
}
if n.Data == "plaintext" {
// Don't render anything else. <plaintext> must be the
// last element in the file, with no closing tag.
return plaintextAbort
}
} else {
for c := n.FirstChild; c != nil; c = c.NextSibling {
if err := render1(w, c); err != nil {
return err
}
}
}
// Render the </xxx> closing tag.
if _, err := w.WriteString("</"); err != nil {
return err
}
if _, err := w.WriteString(n.Data); err != nil {
return err
}
return w.WriteByte('>')
}
func childTextNodesAreLiteral(n *Node) bool {
// Per WHATWG HTML 13.3, if the parent of the current node is a style,
// script, xmp, iframe, noembed, noframes, or plaintext element, and the
// current node is a text node, append the value of the node's data
// literally. The specification is not explicit about it, but we only
// enforce this if we are in the HTML namespace (i.e. when the namespace is
// "").
// NOTE: we also always include noscript elements, although the
// specification states that they should only be rendered as such if
// scripting is enabled for the node (which is not something we track).
if n.Namespace != "" {
return false
}
switch n.Data {
case "iframe", "noembed", "noframes", "noscript", "plaintext", "script", "style", "xmp":
return true
default:
return false
}
}
// writeQuoted writes s to w surrounded by quotes. Normally it will use double
// quotes, but if s contains a double quote, it will use single quotes.
// It is used for writing the identifiers in a doctype declaration.
// In valid HTML, they can't contain both types of quotes.
func writeQuoted(w writer, s string) error {
var q byte = '"'
if strings.Contains(s, `"`) {
q = '\''
}
if err := w.WriteByte(q); err != nil {
return err
}
if _, err := w.WriteString(s); err != nil {
return err
}
if err := w.WriteByte(q); err != nil {
return err
}
return nil
}
// Section 12.1.2, "Elements", gives this list of void elements. Void elements
// are those that can't have any contents.
var voidElements = map[string]bool{
"area": true,
"base": true,
"br": true,
"col": true,
"embed": true,
"hr": true,
"img": true,
"input": true,
"keygen": true, // "keygen" has been removed from the spec, but are kept here for backwards compatibility.
"link": true,
"meta": true,
"param": true,
"source": true,
"track": true,
"wbr": true,
}

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