hugo page_lazy_contentprovider 代码
文件路径：/resources/page/page_lazy_contentprovider.go
/ 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 page
import (
"html/template"
"github.com/gohugoio/hugo/lazy"
)
/ OutputFormatContentProvider represents the method set that is "outputFormat aware" and that we
/ provide lazy initialization for in case they get invoked outside of their normal rendering context, e.g. via .Translations.
/ Note that this set is currently not complete, but should cover the most common use cases.
/ For the others, the implementation will be from the page.NoopPage.
type OutputFormatContentProvider interface {
ContentProvider
TableOfContentsProvider
PageRenderProvider
}
/ LazyContentProvider initializes itself when read. Each method of the
/ ContentProvider interface initializes a content provider and shares it
/ with other methods.
/
/ Used in cases where we cannot guarantee whether the content provider
/ will be needed. Must create via NewLazyContentProvider.
type LazyContentProvider struct {
init *lazy.Init
cp OutputFormatContentProvider
}
/ NewLazyContentProvider returns a LazyContentProvider initialized with
/ function f. The resulting LazyContentProvider calls f in order to
/ retrieve a ContentProvider
func NewLazyContentProvider(f func() (OutputFormatContentProvider, error)) *LazyContentProvider {
lcp := LazyContentProvider{
init: lazy.New(),
cp: NopPage,
}
lcp.init.Add(func() (any, error) {
cp, err := f()
if err != nil {
return nil, err
}
lcp.cp = cp
return nil, nil
})
return &lcp
}
func (lcp *LazyContentProvider) Reset() {
lcp.init.Reset()
}
func (lcp *LazyContentProvider) Content() (any, error) {
lcp.init.Do()
return lcp.cp.Content()
}
func (lcp *LazyContentProvider) Plain() string {
lcp.init.Do()
return lcp.cp.Plain()
}
func (lcp *LazyContentProvider) PlainWords() []string {
lcp.init.Do()
return lcp.cp.PlainWords()
}
func (lcp *LazyContentProvider) Summary() template.HTML {
lcp.init.Do()
return lcp.cp.Summary()
}
func (lcp *LazyContentProvider) Truncated() bool {
lcp.init.Do()
return lcp.cp.Truncated()
}
func (lcp *LazyContentProvider) FuzzyWordCount() int {
lcp.init.Do()
return lcp.cp.FuzzyWordCount()
}
func (lcp *LazyContentProvider) WordCount() int {
lcp.init.Do()
return lcp.cp.WordCount()
}
func (lcp *LazyContentProvider) ReadingTime() int {
lcp.init.Do()
return lcp.cp.ReadingTime()
}
func (lcp *LazyContentProvider) Len() int {
lcp.init.Do()
return lcp.cp.Len()
}
func (lcp *LazyContentProvider) Render(layout ...string) (template.HTML, error) {
lcp.init.Do()
return lcp.cp.Render(layout...)
}
func (lcp *LazyContentProvider) RenderString(args ...any) (template.HTML, error) {
lcp.init.Do()
return lcp.cp.RenderString(args...)
}
func (lcp *LazyContentProvider) TableOfContents() template.HTML {
lcp.init.Do()
return lcp.cp.TableOfContents()
}