mirror of
https://github.com/gohugoio/hugo.git
synced 2024-12-01 17:40:55 -05:00
88 lines
2.3 KiB
Go
88 lines
2.3 KiB
Go
// Copyright 2023 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package sass
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import (
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"fmt"
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"regexp"
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"sort"
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"strings"
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"github.com/gohugoio/hugo/common/types/css"
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)
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const (
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HugoVarsNamespace = "hugo:vars"
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)
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func CreateVarsStyleSheet(vars map[string]any) string {
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if vars == nil {
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return ""
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}
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var varsStylesheet string
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var varsSlice []string
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for k, v := range vars {
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var prefix string
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if !strings.HasPrefix(k, "$") {
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prefix = "$"
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}
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switch v.(type) {
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case css.QuotedString:
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// Marked by the user as a string that needs to be quoted.
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varsSlice = append(varsSlice, fmt.Sprintf("%s%s: %q;", prefix, k, v))
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default:
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if isTypedCSSValue(v) {
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// E.g. 24px, 1.5rem, 10%, hsl(0, 0%, 100%), calc(24px + 36px), #fff, #ffffff.
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varsSlice = append(varsSlice, fmt.Sprintf("%s%s: %v;", prefix, k, v))
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} else {
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// unquote will preserve quotes around URLs etc. if needed.
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varsSlice = append(varsSlice, fmt.Sprintf("%s%s: unquote(%q);", prefix, k, v))
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}
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}
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}
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sort.Strings(varsSlice)
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varsStylesheet = strings.Join(varsSlice, "\n")
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return varsStylesheet
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}
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var (
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isCSSColor = regexp.MustCompile(`^#[0-9a-fA-F]{3,6}$`)
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isCSSFunc = regexp.MustCompile(`^([a-zA-Z-]+)\(`)
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isCSSUnit = regexp.MustCompile(`^([0-9]+)(\.[0-9]+)?([a-zA-Z-%]+)$`)
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)
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// isTypedCSSValue returns true if the given string is a CSS value that
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// we should preserve the type of, as in: Not wrap it in quotes.
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func isTypedCSSValue(v any) bool {
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switch s := v.(type) {
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case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64, float32, float64, css.UnquotedString:
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return true
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case string:
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if isCSSColor.MatchString(s) {
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return true
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}
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if isCSSFunc.MatchString(s) {
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return true
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}
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if isCSSUnit.MatchString(s) {
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return true
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}
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}
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return false
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}
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