hugo/hugolib/page__menus.go
Bjørn Erik Pedersen 90da7664bf Add page fragments support to Related
The main topic of this commit is that you can now index fragments (content heading identifiers) when calling `.Related`.

You can do this by:

* Configure one or more indices with type `fragments`
* The name of those index configurations maps to an (optional) front matter slice with fragment references. This allows you to link
page<->fragment and page<->page.
* This also will index all the fragments (heading identifiers) of the pages.

It's also possible to use type `fragments` indices in shortcode, e.g.:

```
{{ $related := site.RegularPages.Related .Page }}
```

But, and this is important, you need to include the shortcode using the `{{<` delimiter. Not doing so will create infinite loops and timeouts.

This commit also:

* Adds two new methods to Page: Fragments (can also be used to build ToC) and HeadingsFiltered (this is only used in Related Content with
index type `fragments` and `enableFilter` set to true.
* Consolidates all `.Related*` methods into one, which takes either a `Page` or an options map as its only argument.
* Add `context.Context` to all of the content related Page API. Turns out it wasn't strictly needed for this particular feature, but it will
soon become usefil, e.g. in #9339.

Closes #10711
Updates #9339
Updates #10725
2023-02-21 17:56:41 +01:00

71 lines
1.7 KiB
Go

// 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"
"sync"
"github.com/gohugoio/hugo/navigation"
)
type pageMenus struct {
p *pageState
q navigation.MenuQueryProvider
pmInit sync.Once
pm navigation.PageMenus
}
func (p *pageMenus) HasMenuCurrent(menuID string, me *navigation.MenuEntry) bool {
p.p.s.init.menus.Do(context.Background())
p.init()
return p.q.HasMenuCurrent(menuID, me)
}
func (p *pageMenus) IsMenuCurrent(menuID string, inme *navigation.MenuEntry) bool {
p.p.s.init.menus.Do(context.Background())
p.init()
return p.q.IsMenuCurrent(menuID, inme)
}
func (p *pageMenus) Menus() navigation.PageMenus {
// There is a reverse dependency here. initMenus will, once, build the
// site menus and update any relevant page.
p.p.s.init.menus.Do(context.Background())
return p.menus()
}
func (p *pageMenus) menus() navigation.PageMenus {
p.init()
return p.pm
}
func (p *pageMenus) init() {
p.pmInit.Do(func() {
p.q = navigation.NewMenuQueryProvider(
p,
p.p.s,
p.p,
)
var err error
p.pm, err = navigation.PageMenusFromPage(p.p)
if err != nil {
p.p.s.Log.Errorln(p.p.wrapError(err))
}
})
}