mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-21 20:46:30 -05:00
79 lines
1.9 KiB
Go
79 lines
1.9 KiB
Go
// Copyright 2017 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 images
|
|
|
|
import (
|
|
"errors"
|
|
"image"
|
|
"sync"
|
|
|
|
// Importing image codecs for image.DecodeConfig
|
|
_ "image/gif"
|
|
_ "image/jpeg"
|
|
_ "image/png"
|
|
|
|
"github.com/spf13/cast"
|
|
"github.com/spf13/hugo/deps"
|
|
)
|
|
|
|
// New returns a new instance of the images-namespaced template functions.
|
|
func New(deps *deps.Deps) *Namespace {
|
|
return &Namespace{
|
|
cache: map[string]image.Config{},
|
|
deps: deps,
|
|
}
|
|
}
|
|
|
|
// Namespace provides template functions for the "images" namespace.
|
|
type Namespace struct {
|
|
cacheMu sync.RWMutex
|
|
cache map[string]image.Config
|
|
|
|
deps *deps.Deps
|
|
}
|
|
|
|
// Config returns the image.Config for the specified path relative to the
|
|
// working directory.
|
|
func (ns *Namespace) Config(path interface{}) (image.Config, error) {
|
|
filename, err := cast.ToStringE(path)
|
|
if err != nil {
|
|
return image.Config{}, err
|
|
}
|
|
|
|
if filename == "" {
|
|
return image.Config{}, errors.New("config needs a filename")
|
|
}
|
|
|
|
// Check cache for image config.
|
|
ns.cacheMu.RLock()
|
|
config, ok := ns.cache[filename]
|
|
ns.cacheMu.RUnlock()
|
|
|
|
if ok {
|
|
return config, nil
|
|
}
|
|
|
|
f, err := ns.deps.Fs.WorkingDir.Open(filename)
|
|
if err != nil {
|
|
return image.Config{}, err
|
|
}
|
|
|
|
config, _, err = image.DecodeConfig(f)
|
|
|
|
ns.cacheMu.Lock()
|
|
ns.cache[filename] = config
|
|
ns.cacheMu.Unlock()
|
|
|
|
return config, err
|
|
}
|