// Copyright 2020 The Gitea Authors. All rights reserved.// SPDX-License-Identifier: MIT package markdown import (	"fmt"	"strings" 	"forgejo.org/modules/markup" 	"github.com/yuin/goldmark/ast"	"gopkg.in/yaml.v3") // RenderConfig represents rendering configuration for this filetype RenderConfig struct {	Meta     markup.RenderMetaMode	Icon     string	TOC      string // "false": hide,  "side"/empty: in sidebar,  "main"/"true": in main view	Lang     string	yamlNode *yaml.Node 	// Used internally.  Cannot be controlled by frontmatter.	metaLength int} func renderMetaModeFromString(s string) markup.RenderMetaMode {	switch strings.TrimSpace(strings.ToLower(s)) {	case "none":		return markup.RenderMetaAsNone	case "table":		return markup.RenderMetaAsTable	default: // "details"		return markup.RenderMetaAsDetails	}} // UnmarshalYAML implement yaml.v3 UnmarshalYAMLfunc (rc *RenderConfig) UnmarshalYAML(value *yaml.Node) error {	if rc == nil {		return nil	} 	rc.yamlNode = value 	type commonRenderConfig struct {		TOC  string `yaml:"include_toc"`		Lang string `yaml:"lang"`	}	var basic commonRenderConfig	if err := value.Decode(&basic); err != nil {		return fmt.Errorf("unable to decode into commonRenderConfig %w", err)	} 	if basic.Lang != "" {		rc.Lang = basic.Lang	} 	rc.TOC = basic.TOC 	type controlStringRenderConfig struct {		Gitea string `yaml:"gitea"`	} 	var stringBasic controlStringRenderConfig 	if err := value.Decode(&stringBasic); err == nil {		if stringBasic.Gitea != "" {			rc.Meta = renderMetaModeFromString(stringBasic.Gitea)		}		return nil	} 	type yamlRenderConfig struct {		Meta *string `yaml:"meta"`		Icon *string `yaml:"details_icon"`		TOC  *string `yaml:"include_toc"`		Lang *string `yaml:"lang"`	} 	type yamlRenderConfigWrapper struct {		Gitea *yamlRenderConfig `yaml:"gitea"`	} 	var cfg yamlRenderConfigWrapper	if err := value.Decode(&cfg); err != nil {		return fmt.Errorf("unable to decode into yamlRenderConfigWrapper %w", err)	} 	if cfg.Gitea == nil {		return nil	} 	if cfg.Gitea.Meta != nil {		rc.Meta = renderMetaModeFromString(*cfg.Gitea.Meta)	} 	if cfg.Gitea.Icon != nil {		rc.Icon = strings.TrimSpace(strings.ToLower(*cfg.Gitea.Icon))	} 	if cfg.Gitea.Lang != nil && *cfg.Gitea.Lang != "" {		rc.Lang = *cfg.Gitea.Lang	} 	if cfg.Gitea.TOC != nil {		rc.TOC = *cfg.Gitea.TOC	} 	return nil} func (rc *RenderConfig) toMetaNode() ast.Node {	if rc.yamlNode == nil {		return nil	}	switch rc.Meta {	case markup.RenderMetaAsTable:		return nodeToTable(rc.yamlNode)	case markup.RenderMetaAsDetails:		return nodeToDetails(rc.yamlNode, rc.Icon)	default:		return nil	}}