ref: 02eaddc2fbe92c26e67d9f82dd9aabecbbf2106c
dir: /hugolib/orderedMap.go/
// Copyright 2018 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 (
"fmt"
"sync"
)
type orderedMap struct {
sync.RWMutex
keys []interface{}
m map[interface{}]interface{}
}
func newOrderedMap() *orderedMap {
return &orderedMap{m: make(map[interface{}]interface{})}
}
func newOrderedMapFromStringMapString(m map[string]string) *orderedMap {
om := newOrderedMap()
for k, v := range m {
om.Add(k, v)
}
return om
}
func (m *orderedMap) Add(k, v interface{}) {
m.Lock()
defer m.Unlock()
_, found := m.m[k]
if found {
panic(fmt.Sprintf("%v already added", v))
}
m.m[k] = v
m.keys = append(m.keys, k)
}
func (m *orderedMap) Get(k interface{}) (interface{}, bool) {
m.RLock()
defer m.RUnlock()
v, found := m.m[k]
return v, found
}
func (m *orderedMap) Contains(k interface{}) bool {
m.RLock()
defer m.RUnlock()
_, found := m.m[k]
return found
}
func (m *orderedMap) Keys() []interface{} {
m.RLock()
defer m.RUnlock()
return m.keys
}
func (m *orderedMap) Len() int {
m.RLock()
defer m.RUnlock()
return len(m.keys)
}
// Some shortcuts for known types.
func (m *orderedMap) getShortcode(k interface{}) *shortcode {
v, found := m.Get(k)
if !found {
return nil
}
return v.(*shortcode)
}
func (m *orderedMap) getShortcodeRenderer(k interface{}) func() (string, error) {
v, found := m.Get(k)
if !found {
return nil
}
return v.(func() (string, error))
}
func (m *orderedMap) getString(k interface{}) string {
v, found := m.Get(k)
if !found {
return ""
}
return v.(string)
}