vendor: delete

1 files changed, 0 insertions, 111 deletions

diff --git a/vendor/github.com/google/safehtml/stylesheet.go b/vendor/github.com/google/safehtml/stylesheet.go
deleted file mode 100644
index 17de8a517..000000000
--- a/vendor/github.com/google/safehtml/stylesheet.go
+++ /dev/null
@@ -1,111 +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 (
-	"container/list"
-	"fmt"
-	"regexp"
-	"strings"
-)
-
-// A StyleSheet is an immutable string-like type which represents a CSS
-// style sheet and guarantees that its value, as a string, will not cause
-// untrusted script execution (cross-site scripting) when evaluated as CSS
-// in a browser.
-//
-// StyleSheet's string representation can safely be interpolated as the
-// content of a style element within HTML. The StyleSheet string should
-// not be escaped before interpolation.
-type StyleSheet struct {
-	// We declare a StyleSheet not as a string but as a struct wrapping a string
-	// to prevent construction of StyleSheet values through string conversion.
-	str string
-}
-
-// StyleSheetFromConstant constructs a StyleSheet with the
-// underlying stylesheet set to the given styleSheet, which must be an untyped string
-// constant.
-//
-// No runtime validation or sanitization is performed on script; being under
-// application control, it is simply assumed to comply with the StyleSheet
-// contract.
-func StyleSheetFromConstant(styleSheet stringConstant) StyleSheet {
-	return StyleSheet{string(styleSheet)}
-}
-
-// CSSRule constructs a StyleSheet containng a CSS rule of the form:
-//   selector{style}
-// It returns an error if selector contains disallowed characters or unbalanced
-// brackets.
-//
-// The constructed StyleSheet value is guaranteed to fulfill its type contract,
-// but is not guaranteed to be semantically valid CSS.
-func CSSRule(selector string, style Style) (StyleSheet, error) {
-	if strings.ContainsRune(selector, '<') {
-		return StyleSheet{}, fmt.Errorf("selector %q contains '<'", selector)
-	}
-	selectorWithoutStrings := cssStringPattern.ReplaceAllString(selector, "")
-	if matches := invalidCSSSelectorRune.FindStringSubmatch(selectorWithoutStrings); matches != nil {
-		return StyleSheet{}, fmt.Errorf("selector %q contains %q, which is disallowed outside of CSS strings", selector, matches[0])
-	}
-	if !hasBalancedBrackets(selectorWithoutStrings) {
-		return StyleSheet{}, fmt.Errorf("selector %q contains unbalanced () or [] brackets", selector)
-	}
-	return StyleSheet{fmt.Sprintf("%s{%s}", selector, style.String())}, nil
-}
-
-var (
-	// cssStringPattern matches a single- or double-quoted CSS string.
-	cssStringPattern = regexp.MustCompile(
-		`"([^"\r\n\f\\]|\\[\s\S])*"|` + // Double-quoted string literal
-			`'([^'\r\n\f\\]|\\[\s\S])*'`) // Single-quoted string literal
-
-	// invalidCSSSelectorRune matches a rune that is not allowed in a CSS3
-	// selector that does not contain string literals.
-	// See https://w3.org/TR/css3-selectors/#selectors.
-	invalidCSSSelectorRune = regexp.MustCompile(`[^-_a-zA-Z0-9#.:* ,>+~[\]()=^$|]`)
-)
-
-// hasBalancedBrackets returns whether s has balanced () and [] brackets.
-func hasBalancedBrackets(s string) bool {
-	stack := list.New()
-	for i := 0; i < len(s); i++ {
-		c := s[i]
-		if expected, ok := matchingBrackets[c]; ok {
-			e := stack.Back()
-			if e == nil {
-				return false
-			}
-			// Skip success check for this type assertion since it is trivial to
-			// see that only bytes are pushed onto this stack.
-			if v := e.Value.(byte); v != expected {
-				return false
-			}
-			stack.Remove(e)
-			continue
-		}
-		for _, openBracket := range matchingBrackets {
-			if c == openBracket {
-				stack.PushBack(c)
-				break
-			}
-		}
-	}
-	return stack.Len() == 0
-}
-
-// matchingBrackets[x] is the opening bracket that matches closing bracket x.
-var matchingBrackets = map[byte]byte{
-	')': '(',
-	']': '[',
-}
-
-// String returns the string form of the StyleSheet.
-func (s StyleSheet) String() string {
-	return s.str
-}