mirror of https://github.com/gohugoio/hugo.git
114 lines
2.8 KiB
Go
114 lines
2.8 KiB
Go
// Copyright 2017-present 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 tpl
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import (
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"io"
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"text/template/parse"
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"html/template"
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texttemplate "text/template"
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bp "github.com/gohugoio/hugo/bufferpool"
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)
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var (
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_ TemplateExecutor = (*TemplateAdapter)(nil)
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)
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// TemplateHandler manages the collection of templates.
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type TemplateHandler interface {
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TemplateFinder
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AddTemplate(name, tpl string) error
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AddLateTemplate(name, tpl string) error
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LoadTemplates(absPath, prefix string)
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PrintErrors()
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MarkReady()
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RebuildClone()
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}
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// TemplateFinder finds templates.
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type TemplateFinder interface {
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Lookup(name string) *TemplateAdapter
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}
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// Template is the common interface between text/template and html/template.
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type Template interface {
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Execute(wr io.Writer, data interface{}) error
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Name() string
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}
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// TemplateExecutor adds some extras to Template.
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type TemplateExecutor interface {
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Template
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ExecuteToString(data interface{}) (string, error)
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Tree() string
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}
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// TemplateDebugger prints some debug info to stdoud.
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type TemplateDebugger interface {
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Debug()
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}
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// TemplateAdapter implements the TemplateExecutor interface.
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type TemplateAdapter struct {
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Template
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}
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// ExecuteToString executes the current template and returns the result as a
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// string.
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func (t *TemplateAdapter) ExecuteToString(data interface{}) (string, error) {
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b := bp.GetBuffer()
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defer bp.PutBuffer(b)
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if err := t.Execute(b, data); err != nil {
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return "", err
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}
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return b.String(), nil
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}
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// Tree returns the template Parse tree as a string.
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// Note: this isn't safe for parallel execution on the same template
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// vs Lookup and Execute.
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func (t *TemplateAdapter) Tree() string {
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var tree *parse.Tree
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switch tt := t.Template.(type) {
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case *template.Template:
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tree = tt.Tree
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case *texttemplate.Template:
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tree = tt.Tree
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default:
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panic("Unknown template")
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}
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if tree == nil || tree.Root == nil {
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return ""
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}
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s := tree.Root.String()
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return s
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}
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// TemplateFuncsGetter allows to get a map of functions.
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type TemplateFuncsGetter interface {
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GetFuncs() map[string]interface{}
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}
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// TemplateTestMocker adds a way to override some template funcs during tests.
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// The interface is named so it's not used in regular application code.
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type TemplateTestMocker interface {
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SetFuncs(funcMap map[string]interface{})
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}
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