mirror of
https://github.com/gohugoio/hugo.git
synced 2024-07-02 15:20:28 +00:00
114 lines
2.2 KiB
Go
114 lines
2.2 KiB
Go
// Copyright 2021 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 navigation
|
|
|
|
import (
|
|
"sync"
|
|
)
|
|
|
|
type menuCacheEntry struct {
|
|
in []Menu
|
|
out Menu
|
|
}
|
|
|
|
func (entry menuCacheEntry) matches(menuList []Menu) bool {
|
|
if len(entry.in) != len(menuList) {
|
|
return false
|
|
}
|
|
for i, m := range menuList {
|
|
if !menuEqual(m, entry.in[i]) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
func newMenuCache() *menuCache {
|
|
return &menuCache{m: make(map[string][]menuCacheEntry)}
|
|
}
|
|
|
|
func (c *menuCache) clear() {
|
|
c.Lock()
|
|
defer c.Unlock()
|
|
c.m = make(map[string][]menuCacheEntry)
|
|
}
|
|
|
|
type menuCache struct {
|
|
sync.RWMutex
|
|
m map[string][]menuCacheEntry
|
|
}
|
|
|
|
func menuEqual(m1, m2 Menu) bool {
|
|
if m1 == nil && m2 == nil {
|
|
return true
|
|
}
|
|
|
|
if m1 == nil || m2 == nil {
|
|
return false
|
|
}
|
|
|
|
if len(m1) != len(m2) {
|
|
return false
|
|
}
|
|
|
|
if len(m1) == 0 {
|
|
return true
|
|
}
|
|
|
|
for i := 0; i < len(m1); i++ {
|
|
if m1[i] != m2[i] {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (c *menuCache) get(key string, apply func(m Menu), menuLists ...Menu) (Menu, bool) {
|
|
return c.getP(key, func(m *Menu) {
|
|
if apply != nil {
|
|
apply(*m)
|
|
}
|
|
}, menuLists...)
|
|
}
|
|
|
|
func (c *menuCache) getP(key string, apply func(m *Menu), menuLists ...Menu) (Menu, bool) {
|
|
c.Lock()
|
|
defer c.Unlock()
|
|
|
|
if cached, ok := c.m[key]; ok {
|
|
for _, entry := range cached {
|
|
if entry.matches(menuLists) {
|
|
return entry.out, true
|
|
}
|
|
}
|
|
}
|
|
|
|
m := menuLists[0]
|
|
menuCopy := append(Menu(nil), m...)
|
|
|
|
if apply != nil {
|
|
apply(&menuCopy)
|
|
}
|
|
|
|
entry := menuCacheEntry{in: menuLists, out: menuCopy}
|
|
if v, ok := c.m[key]; ok {
|
|
c.m[key] = append(v, entry)
|
|
} else {
|
|
c.m[key] = []menuCacheEntry{entry}
|
|
}
|
|
|
|
return menuCopy, false
|
|
}
|