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// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package markdown
// Inspect traverses the markdown tree in depth-first order. If f returns true, Inspect invokes f
// recursively for each child of the block or inline, followed by a call of f(nil).
func Inspect(markdown string, f func(interface{}) bool) {
document, referenceDefinitions := Parse(markdown)
InspectBlock(document, func(block Block) bool {
if !f(block) {
return false
}
switch v := block.(type) {
case *Paragraph:
for _, inline := range v.ParseInlines(referenceDefinitions) {
InspectInline(inline, func(inline Inline) bool {
return f(inline)
})
}
}
return true
})
}
// InspectBlock traverses the blocks in depth-first order, starting with block. If f returns true,
// InspectBlock invokes f recursively for each child of the block, followed by a call of f(nil).
func InspectBlock(block Block, f func(Block) bool) {
if !f(block) {
return
}
switch v := block.(type) {
case *Document:
for _, child := range v.Children {
InspectBlock(child, f)
}
case *List:
for _, child := range v.Children {
InspectBlock(child, f)
}
case *ListItem:
for _, child := range v.Children {
InspectBlock(child, f)
}
case *BlockQuote:
for _, child := range v.Children {
InspectBlock(child, f)
}
}
f(nil)
}
// InspectInline traverses the blocks in depth-first order, starting with block. If f returns true,
// InspectInline invokes f recursively for each child of the block, followed by a call of f(nil).
func InspectInline(inline Inline, f func(Inline) bool) {
if !f(inline) {
return
}
switch v := inline.(type) {
case *InlineImage:
for _, child := range v.Children {
InspectInline(child, f)
}
case *InlineLink:
for _, child := range v.Children {
InspectInline(child, f)
}
case *ReferenceImage:
for _, child := range v.Children {
InspectInline(child, f)
}
case *ReferenceLink:
for _, child := range v.Children {
InspectInline(child, f)
}
}
f(nil)
}
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