forked from pdfcpu/pdfcpu
/
api.go
1282 lines (938 loc) · 31.3 KB
/
api.go
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package pdfcpu
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"regexp"
"strconv"
"strings"
"time"
//"github.com/hhrutter/pdfcpu/attach"
"github.com/hhrutter/pdfcpu/attach"
"github.com/hhrutter/pdfcpu/crypto"
"github.com/hhrutter/pdfcpu/extract"
"github.com/hhrutter/pdfcpu/log"
"github.com/hhrutter/pdfcpu/merge"
"github.com/hhrutter/pdfcpu/optimize"
"github.com/hhrutter/pdfcpu/read"
"github.com/hhrutter/pdfcpu/types"
"github.com/hhrutter/pdfcpu/validate"
"github.com/hhrutter/pdfcpu/write"
"github.com/pkg/errors"
)
var (
selectedPagesRegExp *regexp.Regexp
)
func stringSet(slice []string) types.StringSet {
strSet := types.StringSet{}
if slice == nil {
return strSet
}
for _, s := range slice {
strSet[s] = true
}
return strSet
}
func setupRegExpForPageSelection() *regexp.Regexp {
e := "[!n]?((-\\d+)|(\\d+(-(\\d+)?)?))"
exp := "^" + e + "(," + e + ")*$"
re, _ := regexp.Compile(exp)
return re
}
func init() {
selectedPagesRegExp = setupRegExpForPageSelection()
}
// Read reads in a PDF file and builds an internal structure holding its cross reference table aka the PDFContext.
func Read(fileIn string, config *types.Configuration) (*types.PDFContext, error) {
//logInfoAPI.Printf("reading %s..\n", fileIn)
ctx, err := read.PDFFile(fileIn, config)
if err != nil {
return nil, errors.Wrap(err, "Read failed.")
}
return ctx, nil
}
// Validate validates a PDF file against ISO-32000-1:2008.
func Validate(fileIn string, config *types.Configuration) error {
from1 := time.Now()
fmt.Printf("validating(mode=%s) %s ...\n", config.ValidationModeString(), fileIn)
//logInfoAPI.Printf("validating(mode=%s) %s..\n", config.ValidationModeString(), fileIn)
ctx, err := Read(fileIn, config)
if err != nil {
return err
}
dur1 := time.Since(from1).Seconds()
from2 := time.Now()
err = validate.XRefTable(ctx.XRefTable)
if err != nil {
err = errors.Wrap(err, "validation error (try -mode=relaxed)")
} else {
fmt.Println("validation ok")
//logInfoAPI.Println("validation ok")
}
dur2 := time.Since(from2).Seconds()
dur := time.Since(from1).Seconds()
log.Stats.Printf("XRefTable:\n%s\n", ctx)
log.Stats.Println("Timing:")
log.Stats.Printf("read : %6.3fs %4.1f%%\n", dur1, dur1/dur*100)
log.Stats.Printf("validate : %6.3fs %4.1f%%\n", dur2, dur2/dur*100)
log.Stats.Printf("total processing time: %6.3fs\n\n", dur)
// at this stage: no binary breakup available!
ctx.Read.LogStats(ctx.Optimized)
return err
}
// Write generates a PDF file for a given PDFContext.
func Write(ctx *types.PDFContext) error {
fmt.Printf("writing %s ...\n", ctx.Write.DirName+ctx.Write.FileName)
//logInfoAPI.Printf("writing to %s..\n", fileName)
err := write.PDFFile(ctx)
if err != nil {
return errors.Wrap(err, "Write failed.")
}
if ctx.StatsFileName != "" {
err = write.AppendStatsFile(ctx)
if err != nil {
return errors.Wrap(err, "Write stats failed.")
}
}
return nil
}
// singlePageFileName generates a filename for a PDFContext and a specific page number.
func singlePageFileName(ctx *types.PDFContext, pageNr int) string {
baseFileName := filepath.Base(ctx.Read.FileName)
fileName := strings.TrimSuffix(baseFileName, ".pdf")
return fileName + "_" + strconv.Itoa(pageNr) + ".pdf"
}
func writeSinglePagePDF(ctx *types.PDFContext, pageNr int, dirOut string) error {
ctx.ResetWriteContext()
w := ctx.Write
w.Command = "Split"
w.ExtractPageNr = pageNr
w.DirName = dirOut + "/"
w.FileName = singlePageFileName(ctx, pageNr)
fmt.Printf("writing %s ...\n", w.DirName+w.FileName)
return write.PDFFile(ctx)
}
func writeSinglePagePDFs(ctx *types.PDFContext, selectedPages types.IntSet, dirOut string) error {
if selectedPages == nil {
selectedPages = types.IntSet{}
}
if len(selectedPages) == 0 {
// All pages selected.
for i := 1; i <= ctx.PageCount; i++ {
selectedPages[i] = true
}
}
for i, v := range selectedPages {
if v {
err := writeSinglePagePDF(ctx, i, dirOut)
if err != nil {
return err
}
}
}
return nil
}
func readAndValidate(fileIn string, config *types.Configuration, from1 time.Time) (ctx *types.PDFContext, dur1, dur2 float64, err error) {
ctx, err = Read(fileIn, config)
if err != nil {
return nil, 0, 0, err
}
dur1 = time.Since(from1).Seconds()
from2 := time.Now()
//fmt.Printf("validating %s ...\n", fileIn)
//logInfoAPI.Printf("validating %s..\n", fileIn)
err = validate.XRefTable(ctx.XRefTable)
if err != nil {
return nil, 0, 0, err
}
dur2 = time.Since(from2).Seconds()
return ctx, dur1, dur2, nil
}
func readValidateAndOptimize(fileIn string, config *types.Configuration, from1 time.Time) (ctx *types.PDFContext, dur1, dur2, dur3 float64, err error) {
ctx, dur1, dur2, err = readAndValidate(fileIn, config, from1)
if err != nil {
return nil, 0, 0, 0, err
}
from3 := time.Now()
//fmt.Printf("optimizing %s ...\n", fileIn)
err = optimize.XRefTable(ctx)
if err != nil {
return nil, 0, 0, 0, err
}
dur3 = time.Since(from3).Seconds()
return ctx, dur1, dur2, dur3, nil
}
// Optimize reads in fileIn, does validation, optimization and writes the result to fileOut.
func Optimize(fileIn, fileOut string, config *types.Configuration) error {
fromStart := time.Now()
ctx, durRead, durVal, durOpt, err := readValidateAndOptimize(fileIn, config, fromStart)
if err != nil {
return err
}
log.Stats.Printf("XRefTable:\n%s\n", ctx)
fromWrite := time.Now()
dirName, fileName := filepath.Split(fileOut)
ctx.Write.DirName = dirName
ctx.Write.FileName = fileName
err = Write(ctx)
if err != nil {
return err
}
durWrite := time.Since(fromWrite).Seconds()
durTotal := time.Since(fromStart).Seconds()
log.Stats.Printf("XRefTable:\n%s\n", ctx)
log.Stats.Println("Timing:")
log.Stats.Printf("read : %6.3fs %4.1f%%\n", durRead, durRead/durTotal*100)
log.Stats.Printf("validate : %6.3fs %4.1f%%\n", durVal, durVal/durTotal*100)
log.Stats.Printf("optimize : %6.3fs %4.1f%%\n", durOpt, durOpt/durTotal*100)
log.Stats.Printf("write : %6.3fs %4.1f%%\n", durWrite, durWrite/durTotal*100)
log.Stats.Printf("total processing time: %6.3fs\n\n", durTotal)
ctx.Read.LogStats(ctx.Optimized)
ctx.Write.LogStats()
return nil
}
// ParsePageSelection ensures a correct page selection expression.
func ParsePageSelection(s string) ([]string, error) {
if s == "" {
return nil, nil
}
// Ensure valid comma separated expression of: {!}{-}# or {!}#-{#}
//
// Negated expressions:
// '!' negates an expression
// since '!' needs to be part of a single quoted string in bash
// as an alternative also 'n' works instead of "!"
//
// Extract all but page 4 may be expressed as: "1-,!4" or "1-,n4"
//
// The pageSelection is evaluated strictly from left to right!
// e.g. "!3,1-5" extracts pages 1-5 whereas "1-5,!3" extracts pages 1,2,4,5
//
if !selectedPagesRegExp.MatchString(s) {
return nil, errors.Errorf("-pages \"%s\" => syntax error\n", s)
}
//fmt.Printf("pageSelection: <%s>\n", pageSelection)
return strings.Split(s, ","), nil
}
func handlePrefix(v string, negated bool, pageCount int, selectedPages types.IntSet) error {
i, err := strconv.Atoi(v)
if err != nil {
return err
}
// Handle overflow gracefully
if i > pageCount {
i = pageCount
}
// identified
// -# ... select all pages up to and including #
// or !-# ... deselect all pages up to and including #
for j := 1; j <= i; j++ {
selectedPages[j] = !negated
}
return nil
}
func handleSuffix(v string, negated bool, pageCount int, selectedPages types.IntSet) error {
// must be #- ... select all pages from here until the end.
// or !#- ... deselect all pages from here until the end.
i, err := strconv.Atoi(v)
if err != nil {
return err
}
// Handle overflow gracefully
if i > pageCount {
return nil
}
for j := i; j <= pageCount; j++ {
selectedPages[j] = !negated
}
return nil
}
func handleSpecificPage(s string, negated bool, pageCount int, selectedPages types.IntSet) error {
// must be # ... select a specific page
// or !# ... deselect a specific page
i, err := strconv.Atoi(s)
if err != nil {
return err
}
// Handle overflow gracefully
if i > pageCount {
return nil
}
selectedPages[i] = !negated
return nil
}
func negation(c byte) bool {
return c == '!' || c == 'n'
}
func selectedPages(pageCount int, pageSelection []string) (selectedPages types.IntSet, err error) {
selectedPages = types.IntSet{}
for _, v := range pageSelection {
//log.Stats.Printf("pageExp: <%s>\n", v)
var negated bool
if negation(v[0]) {
negated = true
//logInfoAPI.Printf("is a negated exp\n")
v = v[1:]
}
if v[0] == '-' {
v = v[1:]
err = handlePrefix(v, negated, pageCount, selectedPages)
if err != nil {
return nil, err
}
continue
}
if strings.HasSuffix(v, "-") {
err = handleSuffix(v[:len(v)-1], negated, pageCount, selectedPages)
if err != nil {
return nil, err
}
continue
}
// if v contains '-' somewhere in the middle
// this must be #-# ... select a page range
// or !#-# ... deselect a page range
pr := strings.Split(v, "-")
if len(pr) == 2 {
from, err := strconv.Atoi(pr[0])
if err != nil {
return nil, err
}
// Handle overflow gracefully
if from > pageCount {
continue
}
thru, err := strconv.Atoi(pr[1])
if err != nil {
return nil, err
}
// Handle overflow gracefully
if thru < from {
continue
}
if thru > pageCount {
thru = pageCount
}
for i := from; i <= thru; i++ {
selectedPages[i] = !negated
}
continue
}
err = handleSpecificPage(pr[0], negated, pageCount, selectedPages)
if err != nil {
return nil, err
}
}
return selectedPages, nil
}
func pagesForPageSelection(pageCount int, pageSelection []string) (types.IntSet, error) {
if pageSelection == nil || len(pageSelection) == 0 {
log.Info.Println("pagesForPageSelection: empty pageSelection")
return nil, nil
}
return selectedPages(pageCount, pageSelection)
}
// Split generates a sequence of single page PDF files in dirOut creating one file for every page of inFile.
func Split(fileIn, dirOut string, config *types.Configuration) error {
fromStart := time.Now()
fmt.Printf("splitting %s into %s ...\n", fileIn, dirOut)
ctx, durRead, durVal, durOpt, err := readValidateAndOptimize(fileIn, config, fromStart)
if err != nil {
return err
}
fromWrite := time.Now()
err = writeSinglePagePDFs(ctx, nil, dirOut)
if err != nil {
return err
}
durWrite := time.Since(fromWrite).Seconds()
durTotal := time.Since(fromStart).Seconds()
log.Stats.Printf("XRefTable:\n%s\n", ctx)
log.Stats.Println("Timing:")
log.Stats.Printf("read : %6.3fs %4.1f%%\n", durRead, durRead/durTotal*100)
log.Stats.Printf("validate : %6.3fs %4.1f%%\n", durVal, durVal/durTotal*100)
log.Stats.Printf("optimize : %6.3fs %4.1f%%\n", durOpt, durOpt/durTotal*100)
log.Stats.Printf("split : %6.3fs %4.1f%%\n", durWrite, durWrite/durTotal*100)
log.Stats.Printf("total processing time: %6.3fs\n\n", durTotal)
ctx.Read.LogStats(ctx.Optimized)
ctx.Write.LogStats()
return nil
}
// appendTo appends fileIn to ctxDest's page tree.
func appendTo(fileIn string, ctxDest *types.PDFContext) error {
log.Stats.Printf("appendTo: appending %s to %s\n", fileIn, ctxDest.Read.FileName)
// Build a PDFContext for fileIn.
ctxSource, _, _, err := readAndValidate(fileIn, ctxDest.Configuration, time.Now())
if err != nil {
return err
}
// Merge the source context into the dest context.
fmt.Printf("merging in %s ...\n", fileIn)
return merge.XRefTables(ctxSource, ctxDest)
}
// Merge some PDF files together and write the result to fileOut.
// This corresponds to concatenating these files in the order specified by filesIn.
// The first entry of filesIn serves as the destination xRefTable where all the remaining files gets merged into.
func Merge(filesIn []string, fileOut string, config *types.Configuration) error {
fmt.Printf("merging into %s: %v\n", fileOut, filesIn)
//logErrorAPI.Printf("Merge: filesIn: %v\n", filesIn)
ctxDest, _, _, err := readAndValidate(filesIn[0], config, time.Now())
if err != nil {
return err
}
if ctxDest.XRefTable.Version() < types.V15 {
v, _ := types.Version("1.5")
ctxDest.XRefTable.RootVersion = &v
log.Stats.Println("Ensure V1.5 for writing object & xref streams")
}
// Repeatedly merge files into fileDest's xref table.
for _, f := range filesIn[1:] {
err = appendTo(f, ctxDest)
if err != nil {
return err
}
}
err = optimize.XRefTable(ctxDest)
if err != nil {
return err
}
err = validate.XRefTable(ctxDest.XRefTable)
if err != nil {
return err
}
ctxDest.Write.Command = "Merge"
dirName, fileName := filepath.Split(fileOut)
ctxDest.Write.DirName = dirName
ctxDest.Write.FileName = fileName
err = Write(ctxDest)
if err != nil {
return err
}
log.Stats.Printf("XRefTable:\n%s\n", ctxDest)
return nil
}
func ensureSelectedPages(ctx *types.PDFContext, selectedPages *types.IntSet) {
if selectedPages != nil && len(*selectedPages) > 0 {
return
}
m := types.IntSet{}
for i := 1; i <= ctx.PageCount; i++ {
m[i] = true
}
*selectedPages = m
}
func imageObjNrs(ctx *types.PDFContext, page int) []int {
o := []int{}
for k, v := range ctx.Optimize.PageImages[page-1] {
if v {
o = append(o, k)
}
}
return o
}
func doExtractImages(ctx *types.PDFContext, selectedPages types.IntSet) error {
ensureSelectedPages(ctx, &selectedPages)
visited := types.IntSet{}
for p, v := range selectedPages {
if v {
log.Info.Printf("writing images for page %d\n", p)
for _, objNr := range imageObjNrs(ctx, p) {
if visited[objNr] {
continue
}
visited[objNr] = true
io, err := extract.ImageData(ctx, objNr)
if err != nil {
return err
}
if io == nil {
continue
}
fileName := fmt.Sprintf("%s/%s_%d_%d.%s", ctx.Write.DirName, io.ResourceNamesString(), p, objNr, io.Extension)
fmt.Printf("writing %s\n", fileName)
err = ioutil.WriteFile(fileName, io.Data(), os.ModePerm)
if err != nil {
return err
}
}
}
}
return nil
}
// ExtractImages dumps embedded image resources from fileIn into dirOut for selected pages.
func ExtractImages(fileIn, dirOut string, pageSelection []string, config *types.Configuration) error {
fromStart := time.Now()
fmt.Printf("extracting images from %s into %s ...\n", fileIn, dirOut)
ctx, durRead, durVal, durOpt, err := readValidateAndOptimize(fileIn, config, fromStart)
if err != nil {
return err
}
fromWrite := time.Now()
pages, err := pagesForPageSelection(ctx.PageCount, pageSelection)
if err != nil {
return err
}
ctx.Write.DirName = dirOut
err = doExtractImages(ctx, pages)
if err != nil {
return err
}
durWrite := time.Since(fromWrite).Seconds()
durTotal := time.Since(fromStart).Seconds()
log.Stats.Printf("XRefTable:\n%s\n", ctx)
log.Stats.Println("Timing:")
log.Stats.Printf("read : %6.3fs %4.1f%%\n", durRead, durRead/durTotal*100)
log.Stats.Printf("validate : %6.3fs %4.1f%%\n", durVal, durVal/durTotal*100)
log.Stats.Printf("optimize : %6.3fs %4.1f%%\n", durOpt, durOpt/durTotal*100)
log.Stats.Printf("write images : %6.3fs %4.1f%%\n", durWrite, durWrite/durTotal*100)
log.Stats.Printf("total processing time: %6.3fs\n\n", durTotal)
return nil
}
func fontObjNrs(ctx *types.PDFContext, page int) []int {
o := []int{}
for k, v := range ctx.Optimize.PageFonts[page-1] {
if v {
o = append(o, k)
}
}
return o
}
func doExtractFonts(ctx *types.PDFContext, selectedPages types.IntSet) error {
ensureSelectedPages(ctx, &selectedPages)
visited := types.IntSet{}
for p, v := range selectedPages {
if v {
log.Info.Printf("writing fonts for page %d\n", p)
for _, objNr := range fontObjNrs(ctx, p) {
if visited[objNr] {
continue
}
visited[objNr] = true
fo, err := extract.FontData(ctx, objNr)
if err != nil {
return err
}
if fo == nil {
continue
}
fileName := fmt.Sprintf("%s/%s_%d_%d.%s", ctx.Write.DirName, fo.ResourceNamesString(), p, objNr, fo.Extension)
err = ioutil.WriteFile(fileName, fo.Data, os.ModePerm)
if err != nil {
return err
}
}
}
}
return nil
}
// ExtractFonts dumps embedded fontfiles from fileIn into dirOut for selected pages.
func ExtractFonts(fileIn, dirOut string, pageSelection []string, config *types.Configuration) error {
fromStart := time.Now()
fmt.Printf("extracting fonts from %s into %s ...\n", fileIn, dirOut)
ctx, durRead, durVal, durOpt, err := readValidateAndOptimize(fileIn, config, fromStart)
if err != nil {
return err
}
fromWrite := time.Now()
pages, err := pagesForPageSelection(ctx.PageCount, pageSelection)
if err != nil {
return err
}
ctx.Write.DirName = dirOut
err = doExtractFonts(ctx, pages)
if err != nil {
return err
}
durWrite := time.Since(fromWrite).Seconds()
durTotal := time.Since(fromStart).Seconds()
log.Stats.Printf("XRefTable:\n%s\n", ctx)
log.Stats.Println("Timing:")
log.Stats.Printf("read : %6.3fs %4.1f%%\n", durRead, durRead/durTotal*100)
log.Stats.Printf("validate : %6.3fs %4.1f%%\n", durVal, durVal/durTotal*100)
log.Stats.Printf("optimize : %6.3fs %4.1f%%\n", durOpt, durOpt/durTotal*100)
log.Stats.Printf("write fonts : %6.3fs %4.1f%%\n", durWrite, durWrite/durTotal*100)
log.Stats.Printf("total processing time: %6.3fs\n\n", durTotal)
return nil
}
// ExtractPages generates single page PDF files from fileIn in dirOut for selected pages.
func ExtractPages(fileIn, dirOut string, pageSelection []string, config *types.Configuration) error {
fromStart := time.Now()
fmt.Printf("extracting pages from %s into %s ...\n", fileIn, dirOut)
ctx, durRead, durVal, durOpt, err := readValidateAndOptimize(fileIn, config, fromStart)
if err != nil {
return err
}
fromWrite := time.Now()
pages, err := pagesForPageSelection(ctx.PageCount, pageSelection)
if err != nil {
return err
}
err = writeSinglePagePDFs(ctx, pages, dirOut)
if err != nil {
return err
}
durWrite := time.Since(fromWrite).Seconds()
durTotal := time.Since(fromStart).Seconds()
log.Stats.Printf("XRefTable:\n%s\n", ctx)
log.Stats.Println("Timing:")
log.Stats.Printf("read : %6.3fs %4.1f%%\n", durRead, durRead/durTotal*100)
log.Stats.Printf("validate : %6.3fs %4.1f%%\n", durVal, durVal/durTotal*100)
log.Stats.Printf("optimize : %6.3fs %4.1f%%\n", durOpt, durOpt/durTotal*100)
log.Stats.Printf("write PDFs : %6.3fs %4.1f%%\n", durWrite, durWrite/durTotal*100)
log.Stats.Printf("total processing time: %6.3fs\n\n", durTotal)
ctx.Read.LogStats(ctx.Optimized)
ctx.Write.LogStats()
return nil
}
func contentObjNrs(ctx *types.PDFContext, page int) ([]int, error) {
objNrs := []int{}
d, err := ctx.PageDict(page)
if err != nil {
return nil, err
}
obj, found := d.Find("Contents")
if !found || obj == nil {
return nil, nil
}
var objNr int
indRef, ok := obj.(types.PDFIndirectRef)
if ok {
objNr = indRef.ObjectNumber.Value()
}
obj, err = ctx.Dereference(obj)
if err != nil {
return nil, err
}
if obj == nil {
return nil, nil
}
switch obj := obj.(type) {
case types.PDFStreamDict:
objNrs = append(objNrs, objNr)
case types.PDFArray:
for _, obj := range obj {
indRef, ok := obj.(types.PDFIndirectRef)
if !ok {
return nil, errors.Errorf("missing indref for page tree dict content no page %d", page)
}
sd, err := ctx.DereferenceStreamDict(obj)
if err != nil {
return nil, err
}
if sd == nil {
continue
}
objNrs = append(objNrs, indRef.ObjectNumber.Value())
}
}
return objNrs, nil
}
func doExtractContent(ctx *types.PDFContext, selectedPages types.IntSet) error {
ensureSelectedPages(ctx, &selectedPages)
visited := types.IntSet{}
for p, v := range selectedPages {
if v {
log.Info.Printf("writing content for page %d\n", p)
objNrs, err := contentObjNrs(ctx, p)
if err != nil {
return err
}
if objNrs == nil {
continue
}
for _, objNr := range objNrs {
if visited[objNr] {
continue
}
visited[objNr] = true
b, err := extract.ContentData(ctx, objNr)
if err != nil {
return err
}
if b == nil {
continue
}
fileName := fmt.Sprintf("%s/%d_%d.txt", ctx.Write.DirName, p, objNr)
err = ioutil.WriteFile(fileName, b, os.ModePerm)
if err != nil {
return err
}
}
}
}
return nil
}
// ExtractContent dumps "PDF source" files from fileIn into dirOut for selected pages.
func ExtractContent(fileIn, dirOut string, pageSelection []string, config *types.Configuration) error {
fromStart := time.Now()
fmt.Printf("extracting content from %s into %s ...\n", fileIn, dirOut)
ctx, durRead, durVal, durOpt, err := readValidateAndOptimize(fileIn, config, fromStart)
if err != nil {
return err
}
fromWrite := time.Now()
pages, err := pagesForPageSelection(ctx.PageCount, pageSelection)
if err != nil {
return err
}
ctx.Write.DirName = dirOut
err = doExtractContent(ctx, pages)
if err != nil {
return err
}
durWrite := time.Since(fromWrite).Seconds()
durTotal := time.Since(fromStart).Seconds()
log.Stats.Printf("XRefTable:\n%s\n", ctx)
log.Stats.Println("Timing:")
log.Stats.Printf("read : %6.3fs %4.1f%%\n", durRead, durRead/durTotal*100)
log.Stats.Printf("validate : %6.3fs %4.1f%%\n", durVal, durVal/durTotal*100)
log.Stats.Printf("optimize : %6.3fs %4.1f%%\n", durOpt, durOpt/durTotal*100)
log.Stats.Printf("write content : %6.3fs %4.1f%%\n", durWrite, durWrite/durTotal*100)
log.Stats.Printf("total processing time: %6.3fs\n\n", durTotal)
return nil
}
// Trim generates a trimmed version of fileIn containing all pages selected.
func Trim(fileIn, fileOut string, pageSelection []string, config *types.Configuration) error {
// pageSelection points to an empty slice if flag pages was omitted.
fromStart := time.Now()
fmt.Printf("trimming %s ...\n", fileIn)
ctx, durRead, durVal, durOpt, err := readValidateAndOptimize(fileIn, config, fromStart)
if err != nil {
return err
}
fromWrite := time.Now()
pages, err := pagesForPageSelection(ctx.PageCount, pageSelection)
if err != nil {
return err
}
ctx.Write.Command = "Trim"
ctx.Write.ExtractPages = pages
dirName, fileName := filepath.Split(fileOut)
ctx.Write.DirName = dirName
ctx.Write.FileName = fileName
err = Write(ctx)
if err != nil {
return err
}
durWrite := time.Since(fromWrite).Seconds()
durTotal := time.Since(fromStart).Seconds()
log.Stats.Printf("XRefTable:\n%s\n", ctx)
log.Stats.Println("Timing:")
log.Stats.Printf("read : %6.3fs %4.1f%%\n", durRead, durRead/durTotal*100)
log.Stats.Printf("validate : %6.3fs %4.1f%%\n", durVal, durVal/durTotal*100)