github.com/linchen2chris/hugo@v0.0.0-20230307053224-cec209389705/tpl/diagrams/goat.go (about)

     1  // Copyright 2022 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 diagrams
    15  
    16  import (
    17  	"bytes"
    18  	"html/template"
    19  	"io"
    20  	"strings"
    21  
    22  	"github.com/bep/goat"
    23  	"github.com/gohugoio/hugo/deps"
    24  	"github.com/spf13/cast"
    25  )
    26  
    27  type goatDiagram struct {
    28  	d goat.SVG
    29  }
    30  
    31  func (d goatDiagram) Inner() template.HTML {
    32  	return template.HTML(d.d.Body)
    33  }
    34  
    35  func (d goatDiagram) Wrapped() template.HTML {
    36  	return template.HTML(d.d.String())
    37  }
    38  
    39  func (d goatDiagram) Width() int {
    40  	return d.d.Width
    41  }
    42  
    43  func (d goatDiagram) Height() int {
    44  	return d.d.Height
    45  }
    46  
    47  // Namespace provides template functions for the diagrams namespace.
    48  type Namespace struct {
    49  	d *deps.Deps
    50  }
    51  
    52  // Goat creates a new SVG diagram from input v.
    53  func (d *Namespace) Goat(v any) SVGDiagram {
    54  	var r io.Reader
    55  
    56  	switch vv := v.(type) {
    57  	case io.Reader:
    58  		r = vv
    59  	case []byte:
    60  		r = bytes.NewReader(vv)
    61  	default:
    62  		r = strings.NewReader(cast.ToString(v))
    63  	}
    64  
    65  	return goatDiagram{
    66  		d: goat.BuildSVG(r),
    67  	}
    68  }