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// Copyright 2015 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
// Prev returns the previous page reletive to the given page.
func (p Pages) Prev(cur *Page) *Page {
for x, c := range p {
if c.UniqueID() == cur.UniqueID() {
if x == 0 {
return p[len(p)-1]
}
return p[x-1]
}
}
return nil
}
// Next returns the next page reletive to the given page.
func (p Pages) Next(cur *Page) *Page {
for x, c := range p {
if c.UniqueID() == cur.UniqueID() {
if x < len(p)-1 {
return p[x+1]
}
return p[0]
}
}
return nil
}
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