github.com/pdfcpu/pdfcpu@v0.11.1/pkg/api/info.go (about)

     1  /*
     2  	Copyright 2020 The pdfcpu Authors.
     3  
     4  	Licensed under the Apache License, Version 2.0 (the "License");
     5  	you may not use this file except in compliance with the License.
     6  	You may obtain a copy of the License at
     7  
     8  		http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  	Unless required by applicable law or agreed to in writing, software
    11  	distributed under the License is distributed on an "AS IS" BASIS,
    12  	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  	See the License for the specific language governing permissions and
    14  	limitations under the License.
    15  */
    16  
    17  package api
    18  
    19  import (
    20  	"io"
    21  
    22  	"github.com/pdfcpu/pdfcpu/pkg/pdfcpu"
    23  	"github.com/pdfcpu/pdfcpu/pkg/pdfcpu/model"
    24  	"github.com/pkg/errors"
    25  )
    26  
    27  // PDFInfo returns information about rs.
    28  func PDFInfo(rs io.ReadSeeker, fileName string, selectedPages []string, fonts bool, conf *model.Configuration) (*pdfcpu.PDFInfo, error) {
    29  	if rs == nil {
    30  		return nil, errors.New("pdfcpu: PDFInfo: missing rs")
    31  	}
    32  
    33  	if conf == nil {
    34  		conf = model.NewDefaultConfiguration()
    35  	} else {
    36  		conf.ValidationMode = model.ValidationRelaxed
    37  	}
    38  	conf.Cmd = model.LISTINFO
    39  
    40  	ctx, err := ReadAndValidate(rs, conf)
    41  	if err != nil {
    42  		return nil, err
    43  	}
    44  
    45  	if fonts {
    46  		if err = OptimizeContext(ctx); err != nil {
    47  			return nil, err
    48  		}
    49  	}
    50  
    51  	pages, err := PagesForPageSelection(ctx.PageCount, selectedPages, false, true)
    52  	if err != nil {
    53  		return nil, err
    54  	}
    55  
    56  	if err := pdfcpu.DetectWatermarks(ctx); err != nil {
    57  		return nil, err
    58  	}
    59  
    60  	return pdfcpu.Info(ctx, fileName, pages, fonts)
    61  }