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gitea/modules/markup/markdown/transform_image.go
wxiaoguang 633785a5f3
Refactor markup render system (#32612)
This PR removes (almost) all path tricks, and introduces "renderhelper"
package.

Now we can clearly see the rendering behaviors for comment/file/wiki,
more details are in "renderhelper" tests.

Fix #31411 , fix #18592, fix #25632 and maybe more problems. (ps: fix
#32608 by the way)
2024-11-24 16:18:57 +08:00

60 lines
1.6 KiB
Go

// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package markdown
import (
"code.gitea.io/gitea/modules/markup"
"github.com/yuin/goldmark/ast"
)
func (g *ASTTransformer) transformImage(ctx *markup.RenderContext, v *ast.Image) {
// Images need two things:
//
// 1. Their src needs to munged to be a real value
// 2. If they're not wrapped with a link they need a link wrapper
// Check if the destination is a real link
if len(v.Destination) > 0 && !markup.IsFullURLBytes(v.Destination) {
v.Destination = []byte(ctx.RenderHelper.ResolveLink(string(v.Destination), markup.LinkTypeMedia))
}
parent := v.Parent()
// Create a link around image only if parent is not already a link
if _, ok := parent.(*ast.Link); !ok && parent != nil {
next := v.NextSibling()
// Create a link wrapper
wrap := ast.NewLink()
wrap.Destination = v.Destination
wrap.Title = v.Title
wrap.SetAttributeString("target", []byte("_blank"))
// Duplicate the current image node
image := ast.NewImage(ast.NewLink())
image.Destination = v.Destination
image.Title = v.Title
for _, attr := range v.Attributes() {
image.SetAttribute(attr.Name, attr.Value)
}
for child := v.FirstChild(); child != nil; {
next := child.NextSibling()
image.AppendChild(image, child)
child = next
}
// Append our duplicate image to the wrapper link
wrap.AppendChild(wrap, image)
// Wire in the next sibling
wrap.SetNextSibling(next)
// Replace the current node with the wrapper link
parent.ReplaceChild(parent, v, wrap)
// But most importantly ensure the next sibling is still on the old image too
v.SetNextSibling(next)
}
}