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// Copyright 2016 The Hugo Authors. All rights reserved.
//
// Portions Copyright The Go Authors.
// 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 tplimpl
import (
"fmt"
"html/template"
"sync"
"github.com/spf13/cast"
"github.com/spf13/hugo/tpl/internal"
// Init the namespaces
_ "github.com/spf13/hugo/tpl/collections"
_ "github.com/spf13/hugo/tpl/compare"
_ "github.com/spf13/hugo/tpl/crypto"
_ "github.com/spf13/hugo/tpl/data"
_ "github.com/spf13/hugo/tpl/encoding"
_ "github.com/spf13/hugo/tpl/images"
_ "github.com/spf13/hugo/tpl/inflect"
_ "github.com/spf13/hugo/tpl/lang"
_ "github.com/spf13/hugo/tpl/math"
_ "github.com/spf13/hugo/tpl/os"
_ "github.com/spf13/hugo/tpl/safe"
_ "github.com/spf13/hugo/tpl/strings"
_ "github.com/spf13/hugo/tpl/time"
)
// Get retrieves partial output from the cache based upon the partial name.
// If the partial is not found in the cache, the partial is rendered and added
// to the cache.
func (t *templateFuncster) Get(key, name string, context interface{}) (p interface{}, err error) {
var ok bool
t.cachedPartials.RLock()
p, ok = t.cachedPartials.p[key]
t.cachedPartials.RUnlock()
if ok {
return
}
t.cachedPartials.Lock()
if p, ok = t.cachedPartials.p[key]; !ok {
t.cachedPartials.Unlock()
p, err = t.partial(name, context)
t.cachedPartials.Lock()
t.cachedPartials.p[key] = p
}
t.cachedPartials.Unlock()
return
}
// partialCache represents a cache of partials protected by a mutex.
type partialCache struct {
sync.RWMutex
p map[string]interface{}
}
// partialCached executes and caches partial templates. An optional variant
// string parameter (a string slice actually, but be only use a variadic
// argument to make it optional) can be passed so that a given partial can have
// multiple uses. The cache is created with name+variant as the key.
func (t *templateFuncster) partialCached(name string, context interface{}, variant ...string) (interface{}, error) {
key := name
if len(variant) > 0 {
for i := 0; i < len(variant); i++ {
key += variant[i]
}
}
return t.Get(key, name, context)
}
func (t *templateFuncster) initFuncMap() {
funcMap := template.FuncMap{
// Namespaces
//"time": t.time.Namespace,
"transform": t.transform.Namespace,
"urls": t.urls.Namespace,
"absURL": t.urls.AbsURL,
"absLangURL": t.urls.AbsLangURL,
"emojify": t.transform.Emojify,
"highlight": t.transform.Highlight,
"htmlEscape": t.transform.HTMLEscape,
"htmlUnescape": t.transform.HTMLUnescape,
"int": func(v interface{}) (int, error) { return cast.ToIntE(v) },
"markdownify": t.transform.Markdownify,
"partial": t.partial,
"partialCached": t.partialCached,
"plainify": t.transform.Plainify,
"print": fmt.Sprint,
"printf": fmt.Sprintf,
"println": fmt.Sprintln,
"ref": t.urls.Ref,
"relURL": t.urls.RelURL,
"relLangURL": t.urls.RelLangURL,
"relref": t.urls.RelRef,
"string": func(v interface{}) (string, error) { return cast.ToStringE(v) },
"urlize": t.PathSpec.URLize,
}
// Merge the namespace funcs
for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
ns := nsf(t.Deps)
// TODO(bep) namespace ns.Context is a dummy func just to make this work.
// Consider if we can add this context to the rendering context in an easy
// way to make this cleaner. Maybe.
funcMap[ns.Name] = ns.Context
for k, v := range ns.Aliases {
funcMap[k] = v
}
}
t.funcMap = funcMap
t.Tmpl.(*templateHandler).setFuncs(funcMap)
}
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