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95 lines
2.5 KiB
Go
95 lines
2.5 KiB
Go
// Package render provides ...
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package render
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import (
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"regexp"
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"strings"
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"github.com/eiblog/eiblog/pkg/config"
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"github.com/eiblog/eiblog/pkg/model"
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"github.com/eiblog/blackfriday"
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)
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// blackfriday 配置
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const (
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commonHtmlFlags = 0 |
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blackfriday.HTML_TOC |
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blackfriday.HTML_USE_XHTML |
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blackfriday.HTML_USE_SMARTYPANTS |
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blackfriday.HTML_SMARTYPANTS_FRACTIONS |
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blackfriday.HTML_SMARTYPANTS_DASHES |
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blackfriday.HTML_SMARTYPANTS_LATEX_DASHES |
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blackfriday.HTML_NOFOLLOW_LINKS
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commonExtensions = 0 |
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blackfriday.EXTENSION_NO_INTRA_EMPHASIS |
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blackfriday.EXTENSION_TABLES |
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blackfriday.EXTENSION_FENCED_CODE |
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blackfriday.EXTENSION_AUTOLINK |
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blackfriday.EXTENSION_STRIKETHROUGH |
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blackfriday.EXTENSION_SPACE_HEADERS |
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blackfriday.EXTENSION_HEADER_IDS |
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blackfriday.EXTENSION_BACKSLASH_LINE_BREAK |
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blackfriday.EXTENSION_DEFINITION_LISTS
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)
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var (
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// 渲染markdown操作和截取摘要操作
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regIdentifier = regexp.MustCompile(config.Conf.BlogApp.General.Identifier)
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// header
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regHeader = regexp.MustCompile("</nav></div>")
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)
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// IgnoreHtmlTag 去掉 html tag
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func IgnoreHtmlTag(src string) string {
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// 去除所有尖括号内的HTML代码
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re, _ := regexp.Compile(`<[\S\s]+?>`)
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src = re.ReplaceAllString(src, "")
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// 去除换行符
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re, _ = regexp.Compile(`\s+`)
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return re.ReplaceAllString(src, "")
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}
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// RenderPage 渲染markdown
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func RenderPage(md []byte) []byte {
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renderer := blackfriday.HtmlRenderer(commonHtmlFlags, "", "")
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return blackfriday.Markdown(md, renderer, commonExtensions)
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}
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// GenerateExcerptMarkdown 生成预览和描述
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func GenerateExcerptMarkdown(article *model.Article) {
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blogapp := config.Conf.BlogApp
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if strings.HasPrefix(article.Content, blogapp.General.DescPrefix) {
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index := strings.Index(article.Content, "\r\n")
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prefix := article.Content[len(blogapp.General.DescPrefix):index]
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article.Desc = IgnoreHtmlTag(prefix)
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article.Content = article.Content[index:]
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}
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// 查找目录
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content := RenderPage([]byte(article.Content))
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index := regHeader.FindIndex(content)
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if index != nil {
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article.Header = string(content[0:index[1]])
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article.Content = string(content[index[1]:])
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} else {
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article.Content = string(content)
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}
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// excerpt
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index = regIdentifier.FindStringIndex(article.Content)
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if index != nil {
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article.Excerpt = IgnoreHtmlTag(article.Content[:index[0]])
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}
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uc := []rune(article.Content)
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length := blogapp.General.Length
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if len(uc) < length {
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length = len(uc)
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}
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article.Excerpt = IgnoreHtmlTag(string(uc[0:length]))
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}
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