github.com/abayer/test-infra@v0.0.5/mungegithub/mungers/shield/shield.go (about)

     1  /*
     2  Copyright 2016 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package shield
    18  
    19  // shield provides a local version of the shields.io service.
    20  
    21  import (
    22  	"bytes"
    23  	"html/template"
    24  )
    25  
    26  var svg = `<svg xmlns="http://www.w3.org/2000/svg" width="{{.Width}}" height="20">
    27  <linearGradient id="a" x2="0" y2="100%">
    28    <stop offset="0" stop-color="#bbb" stop-opacity=".1"/>
    29    <stop offset="1" stop-opacity=".1"/>
    30  </linearGradient>
    31  <rect rx="3" width="100%" height="20" fill="#555"/>
    32  <g fill="{{.Color}}">
    33    <rect rx="3" x="{{.RightStart}}" width="{{.RightWidth}}" height="20"/>
    34    <path d="M{{.RightStart}} 0h4v20h-4z"/>
    35  </g>
    36  <rect rx="3" width="100%" height="20" fill="url(#a)"/>
    37  <g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="11">
    38  <g fill="#010101" opacity=".3">
    39  <text x="{{.XposLeft}}" y="15">{{.Subject}}</text>
    40  <text x="{{.XposRight}}" y="15">{{.Status}}</text>
    41  </g>
    42  <text x="{{.XposLeft}}" y="14">{{.Subject}}</text>
    43  <text x="{{.XposRight}}" y="14">{{.Status}}</text>
    44  </g>
    45  </svg>`
    46  
    47  var svgTemplate = template.Must(template.New("svg").Parse(svg))
    48  
    49  // Make a small SVG badge that looks like `[subject | status]`, with the status
    50  // text in the given color.
    51  func Make(subject, status, color string) []byte {
    52  	// TODO(rmmh): Use better font-size metrics for prettier badges-- estimating
    53  	// character widths as 6px isn't very accurate.
    54  	// See also: https://github.com/badges/shields/blob/master/measure-text.js
    55  	p := struct {
    56  		Width, RightStart, RightWidth int
    57  		XposLeft, XposRight           float64
    58  		Subject, Status               string
    59  		Color                         string
    60  	}{
    61  		Subject:    subject,
    62  		Status:     status,
    63  		RightStart: 13 + 6*len(subject),
    64  		RightWidth: 13 + 6*len(status),
    65  	}
    66  	p.Width = p.RightStart + p.RightWidth
    67  	p.XposLeft = float64(p.RightStart) * 0.5
    68  	p.XposRight = float64(p.RightStart) + float64(p.RightWidth-2)*0.5
    69  	switch color {
    70  	case "brightgreen":
    71  		p.Color = "#4c1"
    72  	case "red":
    73  		p.Color = "#e05d44"
    74  	default:
    75  		panic("Invalid color " + color)
    76  	}
    77  	var buf bytes.Buffer
    78  	svgTemplate.Execute(&buf, p)
    79  	return buf.Bytes()
    80  }