forked from pdfcpu/pdfcpu
/
keyword.go
208 lines (171 loc) · 4.84 KB
/
keyword.go
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/*
Copyright 2020 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 api
import (
"io"
"os"
"time"
"github.com/pdfcpu/pdfcpu/pkg/pdfcpu"
"github.com/pdfcpu/pdfcpu/pkg/pdfcpu/model"
"github.com/pkg/errors"
)
// Keywords returns the keywords of rs's info dict.
func Keywords(rs io.ReadSeeker, conf *model.Configuration) ([]string, error) {
if rs == nil {
return nil, errors.New("pdfcpu: ListKeywords: missing rs")
}
if conf == nil {
conf = model.NewDefaultConfiguration()
} else {
// Validation loads infodict.
conf.ValidationMode = model.ValidationRelaxed
}
conf.Cmd = model.LISTKEYWORDS
ctx, _, _, _, err := ReadValidateAndOptimize(rs, conf, time.Now())
if err != nil {
return nil, err
}
return pdfcpu.KeywordsList(ctx.XRefTable)
}
// AddKeywords adds keywords to rs's infodict and writes the result to w.
func AddKeywords(rs io.ReadSeeker, w io.Writer, files []string, conf *model.Configuration) error {
if rs == nil {
return errors.New("pdfcpu: AddKeywords: missing rs")
}
if conf == nil {
conf = model.NewDefaultConfiguration()
} else {
// Validation loads infodict.
conf.ValidationMode = model.ValidationRelaxed
}
conf.Cmd = model.ADDKEYWORDS
fromStart := time.Now()
ctx, durRead, durVal, durOpt, err := ReadValidateAndOptimize(rs, conf, fromStart)
if err != nil {
return err
}
from := time.Now()
if err = pdfcpu.KeywordsAdd(ctx.XRefTable, files); err != nil {
return err
}
durAdd := time.Since(from).Seconds()
fromWrite := time.Now()
if err = WriteContext(ctx, w); err != nil {
return err
}
durWrite := durAdd + time.Since(fromWrite).Seconds()
durTotal := time.Since(fromStart).Seconds()
logOperationStats(ctx, "add keyword, write", durRead, durVal, durOpt, durWrite, durTotal)
return nil
}
// AddKeywordsFile adds keywords to inFile's infodict and writes the result to outFile.
func AddKeywordsFile(inFile, outFile string, files []string, conf *model.Configuration) (err error) {
var f1, f2 *os.File
if f1, err = os.Open(inFile); err != nil {
return err
}
tmpFile := inFile + ".tmp"
if outFile != "" && inFile != outFile {
tmpFile = outFile
}
if f2, err = os.Create(tmpFile); err != nil {
f1.Close()
return err
}
defer func() {
if err != nil {
f2.Close()
f1.Close()
os.Remove(tmpFile)
return
}
if err = f2.Close(); err != nil {
return
}
if err = f1.Close(); err != nil {
return
}
if outFile == "" || inFile == outFile {
err = os.Rename(tmpFile, inFile)
}
}()
return AddKeywords(f1, f2, files, conf)
}
// RemoveKeywords deletes keywords from rs's infodict and writes the result to w.
func RemoveKeywords(rs io.ReadSeeker, w io.Writer, keywords []string, conf *model.Configuration) error {
if rs == nil {
return errors.New("pdfcpu: RemoveKeywords: missing rs")
}
if conf == nil {
conf = model.NewDefaultConfiguration()
} else {
// Validation loads infodict.
conf.ValidationMode = model.ValidationRelaxed
}
conf.Cmd = model.REMOVEKEYWORDS
fromStart := time.Now()
ctx, durRead, durVal, durOpt, err := ReadValidateAndOptimize(rs, conf, fromStart)
if err != nil {
return err
}
from := time.Now()
var ok bool
if ok, err = pdfcpu.KeywordsRemove(ctx.XRefTable, keywords); err != nil {
return err
}
if !ok {
return errors.New("no keyword removed")
}
durRemove := time.Since(from).Seconds()
fromWrite := time.Now()
if err = WriteContext(ctx, w); err != nil {
return err
}
durWrite := durRemove + time.Since(fromWrite).Seconds()
durTotal := time.Since(fromStart).Seconds()
logOperationStats(ctx, "remove att, write", durRead, durVal, durOpt, durWrite, durTotal)
return nil
}
// RemoveKeywordsFile deletes keywords from inFile's infodict and writes the result to outFile.
func RemoveKeywordsFile(inFile, outFile string, keywords []string, conf *model.Configuration) (err error) {
var f1, f2 *os.File
if f1, err = os.Open(inFile); err != nil {
return err
}
tmpFile := inFile + ".tmp"
if outFile != "" && inFile != outFile {
tmpFile = outFile
}
if f2, err = os.Create(tmpFile); err != nil {
f1.Close()
return err
}
defer func() {
if err != nil {
f2.Close()
f1.Close()
os.Remove(tmpFile)
return
}
if err = f2.Close(); err != nil {
return
}
if err = f1.Close(); err != nil {
return
}
if outFile == "" || inFile == outFile {
err = os.Rename(tmpFile, inFile)
}
}()
return RemoveKeywords(f1, f2, keywords, conf)
}