github.com/rezahousseini/hugo@v0.32.3/transform/livereloadinject.go (about) 1 // Copyright 2015 The Hugo Authors. All rights reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // http://www.apache.org/licenses/LICENSE-2.0 7 // 8 // Unless required by applicable law or agreed to in writing, software 9 // distributed under the License is distributed on an "AS IS" BASIS, 10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 11 // See the License for the specific language governing permissions and 12 // limitations under the License. 13 14 package transform 15 16 import ( 17 "bytes" 18 "fmt" 19 ) 20 21 // LiveReloadInject returns a function that can be used 22 // to inject a script tag for the livereload JavaScript in a HTML document. 23 func LiveReloadInject(port int) func(ct contentTransformer) { 24 return func(ct contentTransformer) { 25 endBodyTag := "</body>" 26 match := []byte(endBodyTag) 27 replaceTemplate := `<script data-no-instant>document.write('<script src="/livereload.js?port=%d&mindelay=10"></' + 'script>')</script>%s` 28 replace := []byte(fmt.Sprintf(replaceTemplate, port, endBodyTag)) 29 30 newcontent := bytes.Replace(ct.Content(), match, replace, 1) 31 if len(newcontent) == len(ct.Content()) { 32 endBodyTag = "</BODY>" 33 replace := []byte(fmt.Sprintf(replaceTemplate, port, endBodyTag)) 34 match := []byte(endBodyTag) 35 newcontent = bytes.Replace(ct.Content(), match, replace, 1) 36 } 37 38 ct.Write(newcontent) 39 } 40 }