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102ec2da7a
Chroma was updated to include a new function to output all CSS classes without skipping any considered redundant with the current style. This will modify the `hugo gen chromastyles` command to use this new function by default, which avoids potential problems if the style is later modified. Also includes requires the updated Chroma (v0.7.2). Resolves #7167
75 lines
2.3 KiB
Go
75 lines
2.3 KiB
Go
// Copyright 2017-present 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 commands
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import (
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"os"
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"github.com/alecthomas/chroma"
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"github.com/alecthomas/chroma/formatters/html"
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"github.com/alecthomas/chroma/styles"
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"github.com/spf13/cobra"
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)
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var (
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_ cmder = (*genChromaStyles)(nil)
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)
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type genChromaStyles struct {
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style string
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highlightStyle string
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linesStyle string
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*baseCmd
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}
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// TODO(bep) highlight
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func createGenChromaStyles() *genChromaStyles {
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g := &genChromaStyles{
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baseCmd: newBaseCmd(&cobra.Command{
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Use: "chromastyles",
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Short: "Generate CSS stylesheet for the Chroma code highlighter",
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Long: `Generate CSS stylesheet for the Chroma code highlighter for a given style. This stylesheet is needed if pygmentsUseClasses is enabled in config.
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See https://help.farbox.com/pygments.html for preview of available styles`,
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}),
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}
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g.cmd.RunE = func(cmd *cobra.Command, args []string) error {
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return g.generate()
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}
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g.cmd.PersistentFlags().StringVar(&g.style, "style", "friendly", "highlighter style (see https://help.farbox.com/pygments.html)")
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g.cmd.PersistentFlags().StringVar(&g.highlightStyle, "highlightStyle", "bg:#ffffcc", "style used for highlighting lines (see https://github.com/alecthomas/chroma)")
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g.cmd.PersistentFlags().StringVar(&g.linesStyle, "linesStyle", "", "style used for line numbers (see https://github.com/alecthomas/chroma)")
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return g
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}
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func (g *genChromaStyles) generate() error {
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builder := styles.Get(g.style).Builder()
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if g.highlightStyle != "" {
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builder.Add(chroma.LineHighlight, g.highlightStyle)
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}
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if g.linesStyle != "" {
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builder.Add(chroma.LineNumbers, g.linesStyle)
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}
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style, err := builder.Build()
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if err != nil {
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return err
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}
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formatter := html.New(html.WithAllClasses(true))
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formatter.WriteCSS(os.Stdout, style)
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return nil
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}
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