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// Copyright 2019 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package hugolib
import (
"context"
"fmt"
"strings"
"github.com/gohugoio/hugo/common/paths"
"github.com/gohugoio/hugo/common/types"
"github.com/gohugoio/hugo/hugolib/doctree"
"github.com/gohugoio/hugo/resources/kinds"
"github.com/gohugoio/hugo/resources/page"
)
// pageTree holds the treen navigational method for a Page.
type pageTree struct {
p *pageState
}
func (pt pageTree) IsAncestor(other any) bool {
n, ok := other.(contentNodeI)
if !ok {
return false
}
if n.Path() == pt.p.Path() {
return false
}
return strings.HasPrefix(n.Path(), paths.AddTrailingSlash(pt.p.Path()))
}
func (pt pageTree) IsDescendant(other any) bool {
n, ok := other.(contentNodeI)
if !ok {
return false
}
if n.Path() == pt.p.Path() {
return false
}
return strings.HasPrefix(pt.p.Path(), paths.AddTrailingSlash(n.Path()))
}
func (pt pageTree) CurrentSection() page.Page {
if kinds.IsBranch(pt.p.Kind()) {
return pt.p
}
dir := pt.p.m.pathInfo.Dir()
if dir == "/" {
return pt.p.s.home
}
_, n := pt.p.s.pageMap.treePages.LongestPrefix(dir, true, func(n contentNodeI) bool { return n.isContentNodeBranch() })
if n != nil {
return n.(page.Page)
}
panic(fmt.Sprintf("CurrentSection not found for %q in lang %s", pt.p.Path(), pt.p.Lang()))
}
func (pt pageTree) FirstSection() page.Page {
s := pt.p.m.pathInfo.Dir()
if s == "/" {
return pt.p.s.home
}
for {
k, n := pt.p.s.pageMap.treePages.LongestPrefix(s, true, func(n contentNodeI) bool { return n.isContentNodeBranch() })
if n == nil {
return nil
}
// /blog
if strings.Count(k, "/") < 2 {
return n.(page.Page)
}
if s == "" {
return nil
}
s = paths.Dir(s)
}
}
func (pt pageTree) InSection(other any) bool {
if pt.p == nil || types.IsNil(other) {
return false
}
p, ok := other.(page.Page)
if !ok {
return false
}
return pt.CurrentSection() == p.CurrentSection()
}
func (pt pageTree) Parent() page.Page {
if pt.p.IsHome() {
return nil
}
dir := pt.p.m.pathInfo.ContainerDir()
if dir == "" {
return pt.p.s.home
}
_, n := pt.p.s.pageMap.treePages.LongestPrefix(dir, true, nil)
if n != nil {
return n.(page.Page)
}
return nil
}
func (pt pageTree) Ancestors() page.Pages {
var ancestors page.Pages
parent := pt.Parent()
for parent != nil {
ancestors = append(ancestors, parent)
parent = parent.Parent()
}
return ancestors
}
func (pt pageTree) Sections() page.Pages {
var (
pages page.Pages
currentBranchPrefix string
s = pt.p.Path()
prefix = paths.AddTrailingSlash(s)
tree = pt.p.s.pageMap.treePages
)
w := &doctree.NodeShiftTreeWalker[contentNodeI]{
Tree: tree,
Prefix: prefix,
}
w.Handle = func(ss string, n contentNodeI, match doctree.DimensionFlag) (bool, error) {
if !n.isContentNodeBranch() {
return false, nil
}
if currentBranchPrefix == "" || !strings.HasPrefix(ss, currentBranchPrefix) {
if p, ok := n.(*pageState); ok && p.IsSection() && p.m.shouldList(false) && p.Parent() == pt.p {
pages = append(pages, p)
} else {
w.SkipPrefix(ss + "/")
}
}
currentBranchPrefix = ss + "/"
return false, nil
}
if err := w.Walk(context.Background()); err != nil {
panic(err)
}
page.SortByDefault(pages)
return pages
}
func (pt pageTree) Page() page.Page {
return pt.p
}
func (p pageTree) SectionsEntries() []string {
sp := p.SectionsPath()
if sp == "/" {
return nil
}
entries := strings.Split(sp[1:], "/")
if len(entries) == 0 {
return nil
}
return entries
}
func (p pageTree) SectionsPath() string {
return p.CurrentSection().Path()
}
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