vendor: delete

1 files changed, 0 insertions, 167 deletions

diff --git a/vendor/github.com/google/safehtml/urlset.go b/vendor/github.com/google/safehtml/urlset.go
deleted file mode 100644
index 8d74a7732..000000000
--- a/vendor/github.com/google/safehtml/urlset.go
+++ /dev/null
@@ -1,167 +0,0 @@
-// Copyright (c) 2017 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 or at
-// https://developers.google.com/open-source/licenses/bsd
-
-package safehtml
-
-import (
-	"bytes"
-	"strconv"
-)
-
-// https://infra.spec.whatwg.org/#ascii-whitespace
-// ASCII whitespace is U+0009 TAB, U+000A LF, U+000C FF, U+000D CR, or U+0020 SPACE.
-var asciiWhitespace [256]bool
-
-// Metacharacters that affect parsing of srcset values.
-var srcsetMetachars [256]bool
-
-func init() {
-	asciiWhitespace['\t'] = true
-	asciiWhitespace[' '] = true
-	asciiWhitespace['\n'] = true
-	asciiWhitespace['\f'] = true
-	asciiWhitespace['\r'] = true
-
-	srcsetMetachars['\t'] = true
-	srcsetMetachars[' '] = true
-	srcsetMetachars['\n'] = true
-	srcsetMetachars['\f'] = true
-	srcsetMetachars['\r'] = true
-	srcsetMetachars[','] = true
-}
-
-// URLSetSanitized returns a safe srcset by individually vetting each
-// substring that specifies a URL.
-//
-// https://html.spec.whatwg.org/multipage/images.html#srcset-attributes
-func URLSetSanitized(str string) URLSet {
-	var buffer bytes.Buffer
-
-	for len(str) != 0 {
-		// Consume one image candidate
-		var url, metadata string
-		_, str = consumeIn(str, asciiWhitespace)
-		url, str = consumeNotIn(str, asciiWhitespace)
-		_, str = consumeIn(str, asciiWhitespace)
-		metadata, str = consumeNotIn(str, srcsetMetachars)
-		_, str = consumeIn(str, asciiWhitespace)
-
-		// Append sanitized content onto buffer.
-		if len(url) != 0 && isSafeURL(url) && isOptionalSrcMetadataWellFormed(metadata) {
-			if buffer.Len() != 0 {
-				// The space before the comma is necessary because
-				// a comma adjacent to a URL will attach to it.
-				buffer.WriteString(" , ")
-			}
-			// URL may contain commas.  Disambiguate.
-			appendURLToSet(url, &buffer)
-			if len(metadata) != 0 {
-				buffer.WriteByte(' ')
-				buffer.WriteString(metadata)
-			}
-		}
-
-		// Consume any trailing comma
-		if len(str) == 0 || str[0] != ',' {
-			break
-		}
-		str = str[1:]
-	}
-
-	if buffer.Len() == 0 {
-		return URLSet{InnocuousURL}
-	}
-
-	return URLSet{buffer.String()}
-}
-
-// appendURLToSet appends a URL so that it does not start or end with a comma
-//
-// https://html.spec.whatwg.org/multipage/images.html#srcset-attributes
-// parsing step 2 which says:
-// """
-// A valid non-empty URL that does not start or end with a U+002C COMMA character (,),
-// referencing a non-interactive, optionally animated, image resource that is neither
-// paged nor scripted
-// """
-//
-// Simply replacing all commas would break data:image/png;base64,IMAGECONTENT
-// Note: This breaks data URLs with empty content since they end with a comma.
-// We could handle that case by appending a '#'.
-func appendURLToSet(url string, buffer *bytes.Buffer) {
-	n := len(url)
-	left, right := 0, n
-	if url[left] == ',' {
-		buffer.WriteString("%2c")
-		left++
-	}
-	commaAtEnd := false
-	if left < right && url[right-1] == ',' {
-		commaAtEnd = true
-		right--
-	}
-	buffer.WriteString(url[left:right])
-	if commaAtEnd {
-		buffer.WriteString("%2c")
-	}
-}
-
-// consumeNotIn uses bytes in str as bit indices in mask to find
-// the least index >= left whose byte corresponds to a zero bit.
-func consumeNotIn(str string, mask [256]bool) (consumed, rest string) {
-	i, n := 0, len(str)
-	for ; i < n; i++ {
-		if mask[str[i]] {
-			return str[0:i], str[i:n]
-		}
-	}
-	return str, ""
-}
-
-// consumeIn is like consumeNotIn but treats mask as inverted.
-func consumeIn(str string, mask [256]bool) (consumed, rest string) {
-	for i, n := 0, len(str); i < n; i++ {
-		if !mask[str[i]] {
-			return str[0:i], str[i:n]
-		}
-	}
-	return str, ""
-}
-
-// isOptionalSrcMetadataWellFormed is true when its input is empty and
-// when it is a floating point number optionally followed by an ASCII letter.
-func isOptionalSrcMetadataWellFormed(metadata string) bool {
-	// srcset for both image candidates (<img srcset>) and
-	// the proposal for script allow a number and an optional letter
-	// afterwards.
-	n := len(metadata)
-	if n == 0 {
-		// Metadata is optional
-		return true
-	}
-	metadataPrefix := metadata
-	if last := metadata[n-1] | 32; 'a' <= last && last <= 'z' {
-		metadataPrefix = metadata[0 : n-1]
-	}
-	// This overmatches
-	// html.spec.whatwg.org/multipage/common-microsyntaxes.html#valid-floating-point-number
-	// but is sufficient.
-	_, err := strconv.ParseFloat(metadataPrefix, 64)
-	return err == nil
-}
-
-// URLSet corresponds to the value of a srcset attribute outside a
-// TrustedResourceURL context.
-type URLSet struct {
-	// We declare a URLSet not as a string but as a struct wrapping a string
-	// to prevent construction of URL values through string conversion.
-	str string
-}
-
-// String returns the string content of a URLSet
-func (s URLSet) String() string {
-	return s.str
-}