mirror of
https://github.com/gohugoio/hugo.git
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81c13171a9
As pointed out by the linter, some exported functions and types are missing doc comments. The linter warnings have been reduced from 194 to 116. Not all missing comments have been added in this commit though.
129 lines
3.3 KiB
Go
129 lines
3.3 KiB
Go
// Copyright 2017 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package partials
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import (
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"fmt"
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"html/template"
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"strings"
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"sync"
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texttemplate "text/template"
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bp "github.com/gohugoio/hugo/bufferpool"
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"github.com/gohugoio/hugo/deps"
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)
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// TestTemplateProvider is global deps.ResourceProvider.
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// NOTE: It's currently unused.
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var TestTemplateProvider deps.ResourceProvider
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// partialCache represents a cache of partials protected by a mutex.
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type partialCache struct {
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sync.RWMutex
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p map[string]interface{}
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}
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// New returns a new instance of the templates-namespaced template functions.
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func New(deps *deps.Deps) *Namespace {
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return &Namespace{
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deps: deps,
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cachedPartials: partialCache{p: make(map[string]interface{})},
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}
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}
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// Namespace provides template functions for the "templates" namespace.
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type Namespace struct {
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deps *deps.Deps
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cachedPartials partialCache
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}
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// Include executes the named partial and returns either a string,
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// when the partial is a text/template, or template.HTML when html/template.
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func (ns *Namespace) Include(name string, contextList ...interface{}) (interface{}, error) {
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if strings.HasPrefix("partials/", name) {
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name = name[8:]
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}
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var context interface{}
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if len(contextList) == 0 {
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context = nil
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} else {
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context = contextList[0]
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}
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for _, n := range []string{"partials/" + name, "theme/partials/" + name} {
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templ := ns.deps.Tmpl.Lookup(n)
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if templ == nil {
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// For legacy reasons.
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templ = ns.deps.Tmpl.Lookup(n + ".html")
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}
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if templ != nil {
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b := bp.GetBuffer()
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defer bp.PutBuffer(b)
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if err := templ.Execute(b, context); err != nil {
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return "", err
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}
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if _, ok := templ.Template.(*texttemplate.Template); ok {
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return b.String(), nil
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}
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return template.HTML(b.String()), nil
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}
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}
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return "", fmt.Errorf("Partial %q not found", name)
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}
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// getCached executes and caches partial templates. An optional variant
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// string parameter (a string slice actually, but be only use a variadic
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// argument to make it optional) can be passed so that a given partial can have
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// multiple uses. The cache is created with name+variant as the key.
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func (ns *Namespace) getCached(name string, context interface{}, variant ...string) (interface{}, error) {
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key := name
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if len(variant) > 0 {
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for i := 0; i < len(variant); i++ {
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key += variant[i]
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}
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}
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return ns.getOrCreate(key, name, context)
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}
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func (ns *Namespace) getOrCreate(key, name string, context interface{}) (p interface{}, err error) {
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var ok bool
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ns.cachedPartials.RLock()
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p, ok = ns.cachedPartials.p[key]
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ns.cachedPartials.RUnlock()
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if ok {
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return
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}
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ns.cachedPartials.Lock()
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if p, ok = ns.cachedPartials.p[key]; !ok {
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ns.cachedPartials.Unlock()
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p, err = ns.Include(name, context)
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ns.cachedPartials.Lock()
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ns.cachedPartials.p[key] = p
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}
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ns.cachedPartials.Unlock()
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return
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}
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