github.com/graemephi/kahugo@v0.62.3-0.20211121071557-d78c0423784d/hugolib/page__menus.go (about)

     1  // Copyright 2019 The Hugo Authors. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  // http://www.apache.org/licenses/LICENSE-2.0
     7  //
     8  // Unless required by applicable law or agreed to in writing, software
     9  // distributed under the License is distributed on an "AS IS" BASIS,
    10  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package hugolib
    15  
    16  import (
    17  	"sync"
    18  
    19  	"github.com/gohugoio/hugo/navigation"
    20  )
    21  
    22  type pageMenus struct {
    23  	p *pageState
    24  
    25  	q navigation.MenuQueryProvider
    26  
    27  	pmInit sync.Once
    28  	pm     navigation.PageMenus
    29  }
    30  
    31  func (p *pageMenus) HasMenuCurrent(menuID string, me *navigation.MenuEntry) bool {
    32  	p.p.s.init.menus.Do()
    33  	p.init()
    34  	return p.q.HasMenuCurrent(menuID, me)
    35  }
    36  
    37  func (p *pageMenus) IsMenuCurrent(menuID string, inme *navigation.MenuEntry) bool {
    38  	p.p.s.init.menus.Do()
    39  	p.init()
    40  	return p.q.IsMenuCurrent(menuID, inme)
    41  }
    42  
    43  func (p *pageMenus) Menus() navigation.PageMenus {
    44  	// There is a reverse dependency here. initMenus will, once, build the
    45  	// site menus and update any relevant page.
    46  	p.p.s.init.menus.Do()
    47  
    48  	return p.menus()
    49  }
    50  
    51  func (p *pageMenus) menus() navigation.PageMenus {
    52  	p.init()
    53  	return p.pm
    54  }
    55  
    56  func (p *pageMenus) init() {
    57  	p.pmInit.Do(func() {
    58  		p.q = navigation.NewMenuQueryProvider(
    59  			p,
    60  			p.p.s,
    61  			p.p,
    62  		)
    63  
    64  		var err error
    65  		p.pm, err = navigation.PageMenusFromPage(p.p)
    66  		if err != nil {
    67  			p.p.s.Log.Errorln(p.p.wrapError(err))
    68  		}
    69  	})
    70  }