gitea/modules/markup/html_emoji.go
wxiaoguang 8a20fba8eb
Refactor markup render system ()
Remove unmaintainable sanitizer rules. No need to add special "class"
regexp rules anymore, use RenderInternal.SafeAttr instead, more details
(and examples) are in the tests
2024-11-18 13:25:42 +08:00

114 lines
2.9 KiB
Go

// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package markup
import (
"strings"
"code.gitea.io/gitea/modules/emoji"
"code.gitea.io/gitea/modules/setting"
"golang.org/x/net/html"
"golang.org/x/net/html/atom"
)
func createEmoji(ctx *RenderContext, content, name string) *html.Node {
span := &html.Node{
Type: html.ElementNode,
Data: atom.Span.String(),
Attr: []html.Attribute{},
}
span.Attr = append(span.Attr, ctx.RenderInternal.NodeSafeAttr("class", "emoji"))
if name != "" {
span.Attr = append(span.Attr, html.Attribute{Key: "aria-label", Val: name})
}
text := &html.Node{
Type: html.TextNode,
Data: content,
}
span.AppendChild(text)
return span
}
func createCustomEmoji(ctx *RenderContext, alias string) *html.Node {
span := &html.Node{
Type: html.ElementNode,
Data: atom.Span.String(),
Attr: []html.Attribute{},
}
span.Attr = append(span.Attr, ctx.RenderInternal.NodeSafeAttr("class", "emoji"))
span.Attr = append(span.Attr, html.Attribute{Key: "aria-label", Val: alias})
img := &html.Node{
Type: html.ElementNode,
DataAtom: atom.Img,
Data: "img",
Attr: []html.Attribute{},
}
img.Attr = append(img.Attr, html.Attribute{Key: "alt", Val: ":" + alias + ":"})
img.Attr = append(img.Attr, html.Attribute{Key: "src", Val: setting.StaticURLPrefix + "/assets/img/emoji/" + alias + ".png"})
span.AppendChild(img)
return span
}
// emojiShortCodeProcessor for rendering text like :smile: into emoji
func emojiShortCodeProcessor(ctx *RenderContext, node *html.Node) {
start := 0
next := node.NextSibling
for node != nil && node != next && start < len(node.Data) {
m := globalVars().emojiShortCodeRegex.FindStringSubmatchIndex(node.Data[start:])
if m == nil {
return
}
m[0] += start
m[1] += start
start = m[1]
alias := node.Data[m[0]:m[1]]
alias = strings.ReplaceAll(alias, ":", "")
converted := emoji.FromAlias(alias)
if converted == nil {
// check if this is a custom reaction
if _, exist := setting.UI.CustomEmojisMap[alias]; exist {
replaceContent(node, m[0], m[1], createCustomEmoji(ctx, alias))
node = node.NextSibling.NextSibling
start = 0
continue
}
continue
}
replaceContent(node, m[0], m[1], createEmoji(ctx, converted.Emoji, converted.Description))
node = node.NextSibling.NextSibling
start = 0
}
}
// emoji processor to match emoji and add emoji class
func emojiProcessor(ctx *RenderContext, node *html.Node) {
start := 0
next := node.NextSibling
for node != nil && node != next && start < len(node.Data) {
m := emoji.FindEmojiSubmatchIndex(node.Data[start:])
if m == nil {
return
}
m[0] += start
m[1] += start
codepoint := node.Data[m[0]:m[1]]
start = m[1]
val := emoji.FromCode(codepoint)
if val != nil {
replaceContent(node, m[0], m[1], createEmoji(ctx, codepoint, val.Description))
node = node.NextSibling.NextSibling
start = 0
}
}
}