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border.go
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border.go
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/*
Copyright 2021 The pdfcpu Authors.
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 primitives
import (
"github.com/meandrewdev/pdfcpu/pkg/pdfcpu/color"
"github.com/meandrewdev/pdfcpu/pkg/pdfcpu/types"
"github.com/pkg/errors"
)
type Border struct {
pdf *PDF
Name string
Width int
Color string `json:"col"`
col *color.SimpleColor
Style string
style types.LineJoinStyle
}
func (b *Border) validate() error {
if b.Name == "$" {
return errors.New("pdfcpu: invalid border reference $")
}
if b.Color != "" {
sc, err := b.pdf.parseColor(b.Color)
if err != nil {
return err
}
b.col = sc
}
b.style = types.LJMiter
if b.Style != "" {
switch b.Style {
case "miter":
b.style = types.LJMiter
case "round":
b.style = types.LJRound
case "bevel":
b.style = types.LJBevel
default:
return errors.Errorf("pdfcpu: invalid border style: %s (should be \"miter\", \"round\" or \"bevel\")", b.Style)
}
}
return nil
}
func (b *Border) mergeIn(b0 *Border) {
if b.Width == 0 {
b.Width = b0.Width
}
if b.col == nil {
b.col = b0.col
}
if b.style == types.LJMiter {
b.style = b0.style
}
}
// func (b *Border) SetCol(c color.SimpleColor) {
// b.col = &c
// }
func (b Border) calc() (boWidth float64, boCol *color.SimpleColor) {
if b.col == nil {
return 0, &color.Black
}
return float64(b.Width), b.col
}