!config
# Arara, the cool TeX automation tool
# Copyright (c) 2023, Island of TeX
# All rights reserved.
#
# This rule is part of arara.
identifier: pdfcrop
name: PDFCrop
authors:
- Island of TeX
commands:
- name: The cropping tool
  command: >
    @{
        base = getBasename(reference.fileName);
        input = base.concat('.pdf');
        return getCommand('pdfcrop', verbose, debug, engine,
               margins, clip, hires, ini, restricted, papersize,
               resolution, bbox, uncompress, options, input, output);
    }
arguments:
- identifier: output
  flag: >
    @{
        return isEmpty(parameters.output,
               getBasename(reference.fileName).
               concat('-crop.pdf'),
               parameters.output);
    }
  default: ''
- identifier: verbose
  flag: >
    @{
        return isTrue(parameters.verbose, '--verbose', '--noverbose');
    }
- identifier: debug
  flag: >
    @{
        return isTrue(parameters.debug, '--debug', '--nodebug');
    }
- identifier: engine
  flag: >
    @{
        engines = [ 'pdftex', 'xetex', 'luatex' ];
        if (engines.contains(parameters.engine)) {
            return '--'.concat(parameters.engine);
        }
        else {
            throwError('The provided engine is invalid.');
        }
    }
- identifier: margins
  flag: >
    @{
        if (isList(parameters.margins)) {
            if (parameters.margins.size() != 4) {
                throwError('Margins require 4 elements.');
            }
            else {
                ms = [];
                foreach (m : parameters.margins)
                    ms.add(m.toString());
                return [ '--margins', String.join(' ', ms) ];
            }
        }
        else {
          throwError('I was expecting a list.');
        }
    }
- identifier: clip
  flag: >
    @{
        return isTrue(parameters.clip, '--clip', '--noclip');
    }
- identifier: hires
  flag: >
    @{
        return isTrue(parameters.hires, '--hires', '--nohires');
    }
- identifier: ini
  flag: >
    @{
        return isTrue(parameters.ini, '--ini', '--noini');
    }
- identifier: restricted
  flag: >
    @{
        return isTrue(parameters.restricted, '--restricted');
    }
- identifier: papersize
  flag: >
    @{
        return [ '--papersize', parameters.papersize ];
    }
- identifier: resolution
  flag: >
    @{
        return [ '--resolution', parameters.resolution ];
    }
- identifier: bbox
  flag: >
    @{
        if (isList(parameters.bbox)) {
            if (parameters.bbox.size() != 4) {
                throwError('Bounding box require 4 elements.');
            }
            else {
                ms = [];
                foreach (m : parameters.bbox)
                    ms.add(m.toString());
                return [ '--margins', String.join(' ', ms) ];
            }
        }
        else {
          throwError('I was expecting a list.');
        }
    }
- identifier: uncompress
  flag: >
    @{
        return isTrue(parameters.uncompress, '--uncompress');
    }
- identifier: options
  flag: >
    @{
        if (isList(parameters.options)) {
            return parameters.options;
        }
        else {
            throwError('I was expecting a list of options.');
        }
    }