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font.go
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font.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/pkg/errors"
"github.com/wdrai/pdfcpu/pkg/font"
"github.com/wdrai/pdfcpu/pkg/pdfcpu"
)
type FormFont struct {
pdf *PDF
Name string
Size int
Color string `json:"col"`
col *pdfcpu.SimpleColor
}
func (f *FormFont) validate() error {
if f.Name == "$" {
return errors.New("pdfcpu: invalid font reference $")
}
if f.Name != "" && f.Name[0] != '$' {
if !font.SupportedFont(f.Name) {
return errors.Errorf("pdfcpu: font %s is unsupported, please refer to \"pdfcpu fonts list\".\n", f.Name)
}
if f.Size <= 0 {
return errors.Errorf("pdfcpu: invalid font size: %d", f.Size)
}
}
if f.Color != "" {
sc, err := f.pdf.parseColor(f.Color)
if err != nil {
return err
}
f.col = sc
}
return nil
}
func (f *FormFont) mergeIn(f0 *FormFont) {
if f.Name == "" {
f.Name = f0.Name
}
if f.Size == 0 {
f.Size = f0.Size
}
if f.col == nil {
f.col = f0.col
}
}