125 lines
2.9 KiB
Go
125 lines
2.9 KiB
Go
// Copyright (C) 2018 Marius Schellenberger
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package render
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import (
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"git.giftfish.de/ston1th/gowiki/pkg/core"
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"github.com/blevesearch/bleve/analysis"
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"github.com/blevesearch/bleve/analysis/char/html"
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"github.com/russross/blackfriday"
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"html/template"
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"regexp"
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"strconv"
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"strings"
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)
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var filter = makeFilter()
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func makeFilter() analysis.CharFilter {
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f, _ := html.CharFilterConstructor(nil, nil)
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return f
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}
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var (
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reHeader = regexp.MustCompile("(<h[1-6]>)(.+)(</h[1-6]>)")
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reLink = regexp.MustCompile(`id="(.+?)"`)
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whiteSpace = regexp.MustCompile(`\s+`)
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reIndex = regexp.MustCompile("<h([1-6])>(.+)</h[1-6]>")
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titleRe = regexp.MustCompile("[^a-zA-Z0-9 -]+")
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)
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func Render(p *core.Page) string {
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rend := blackfriday.MarkdownCommon([]byte(p.Markdown))
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index, html := buildIndex(string(rend))
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html = strings.Replace(html, "<table>", `<table class="table">`, -1)
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html = strings.Replace(html, "</h1>", `</h1><hr>`, -1)
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html = strings.Replace(html, "<a", `<a target="_blank"`, -1)
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p.PageIndex = template.HTML(index)
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p.HTML = template.HTML(html)
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return whiteSpace.ReplaceAllString(string(filter.Filter(rend)), " ")
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}
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func spaceReplace(s string) string {
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return whiteSpace.ReplaceAllString(s, "+")
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}
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func Title(title string) string {
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return spaceReplace(titleRe.ReplaceAllString(title, ""))
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}
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func StoreTitle(section, title string) string {
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return section + "/" + title
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}
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func UnstoreTitle(storeTitle string) (section, title string) {
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if a := strings.Split(storeTitle, "/"); len(a) == 2 {
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return a[0], a[1]
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}
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return
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}
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func buildIndex(html string) (string, string) {
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var ret string
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m := make(map[string]int)
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hn := reIndex.FindAllStringSubmatch(html, -1)
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html = reHeader.ReplaceAllString(html, `<a id="${2}" class="anchor"></a>${1}${2}${3}`)
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html = reLink.ReplaceAllStringFunc(html, spaceReplace)
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for k, v := range hn {
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link := Title(v[2])
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i := m[link]
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m[link] = i + 1
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newLink := link + strconv.Itoa(i)
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html = strings.Replace(html, link+`"`, newLink+`"`, 1)
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ret += before(hn, k)
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ret += `<li><a href="#` + newLink + `">` + v[2] + "</a>"
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ret += after(hn, k)
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}
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return ret, html
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}
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func before(arr [][]string, i int) string {
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c, _ := strconv.Atoi(arr[i][1])
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if c == 1 {
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return `<ul type="circle">`
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}
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return ""
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}
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func after(arr [][]string, i int) string {
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c, _ := strconv.Atoi(arr[i][1])
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if len(arr) <= i+1 {
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return closeTag(c-1) + "</ul>"
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}
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n, _ := strconv.Atoi(arr[i+1][1])
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if n == 1 {
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return closeTag(c-n) + "</ul>"
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} else if n < c {
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return closeTag(c - n)
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} else if n > c {
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return openTag(n - c)
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} else if n == c {
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return "</li>"
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}
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return ""
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}
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func openTag(j int) (ret string) {
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for i := 0; i < j; i++ {
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ret += `<ul type="circle"><li>`
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}
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if j > 1 {
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ret = strings.Replace(ret, "circle", "none", j-1)
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}
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ret = ret[0 : len(ret)-4]
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return
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}
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func closeTag(j int) (ret string) {
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for i := 0; i < j; i++ {
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ret += "</li></ul></li>"
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}
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if j > 1 {
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ret = strings.Replace(ret, "</li></li>", "</li>", -1)
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}
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return
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}
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