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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 (
"sync"
"github.com/gohugoio/hugo/resources/page"
)
func newPagePaginator(source *pageState) *pagePaginator {
return &pagePaginator{
source: source,
pagePaginatorInit: &pagePaginatorInit{},
}
}
type pagePaginator struct {
*pagePaginatorInit
source *pageState
}
type pagePaginatorInit struct {
init sync.Once
current *page.Pager
}
// reset resets the paginator to allow for a rebuild.
func (p *pagePaginator) reset() {
p.pagePaginatorInit = &pagePaginatorInit{}
}
func (p *pagePaginator) Paginate(seq interface{}, options ...interface{}) (*page.Pager, error) {
var initErr error
p.init.Do(func() {
pagerSize, err := page.ResolvePagerSize(p.source.s.Cfg, options...)
if err != nil {
initErr = err
return
}
pd := p.source.targetPathDescriptor
pd.Type = p.source.outputFormat()
paginator, err := page.Paginate(pd, seq, pagerSize)
if err != nil {
initErr = err
return
}
p.current = paginator.Pagers()[0]
})
if initErr != nil {
return nil, initErr
}
return p.current, nil
}
func (p *pagePaginator) Paginator(options ...interface{}) (*page.Pager, error) {
var initErr error
p.init.Do(func() {
pagerSize, err := page.ResolvePagerSize(p.source.s.Cfg, options...)
if err != nil {
initErr = err
return
}
pd := p.source.targetPathDescriptor
pd.Type = p.source.outputFormat()
var pages page.Pages
if p.source.IsHome() {
// From Hugo 0.57 we made home.Pages() work like any other
// section. To avoid the default paginators for the home page
// changing in the wild, we make this a special case.
pages = p.source.s.RegularPages()
} else {
pages = p.source.Pages()
}
paginator, err := page.Paginate(pd, pages, pagerSize)
if err != nil {
initErr = err
return
}
p.current = paginator.Pagers()[0]
})
if initErr != nil {
return nil, initErr
}
return p.current, nil
}
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