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//! Module regulating the comparison and feature sets / allowed plugins of a PDF document
//!
//! NOTE: All credit to Wikipedia:
//!
//! [PDF/X Versions](https://en.wikipedia.org/wiki/PDF/X)
//!
//! [PDF/A Versions](https://en.wikipedia.org/wiki/PDF/A)
/// List of (relevant) PDF versions
/// Please note the difference between **PDF/A** (archiving), **PDF/UA** (universal acessibility),
/// **PDF/X** (printing), **PDF/E** (engineering / CAD), **PDF/VT** (large volume transactions with
/// repeated content)
#[derive(Debug, PartialEq, Eq, Clone)]
#[allow(non_camel_case_types)]
pub enum PdfConformance {
/// `PDF/A-1b` basic PDF, many features restricted
A1B_2005_PDF_1_4,
/// `PDF/A-1a` language specification, hierarchical document structure,
/// character mappings to unicode, descriptive text for images
A1A_2005_PDF_1_4,
/// `PDF/A-2:2011` - JPEG compression, transpareny, layering, OpenType fonts
A2_2011_PDF_1_7,
/// `PDF/A-2a:2011`
A2A_2011_PDF_1_7,
/// `PDF/A-2b:2011`
A2B_2011_PDF_1_7,
/// `PDF/A-2u:2011` - requires all text to be Unicode
A2U_2011_PDF_1_7,
/// `PDF/A-3` - like A2 but with embedded files (XML, CAD, etc.)
A3_2012_PDF_1_7,
/// `PDF/UA-1` extra functions for accessibility (blind, screenreaders, search, dynamic layout)
UA_2014_PDF_1_6,
/// `PDF/X-1a:2001` no ICC profiles
X1A_2001_PDF_1_3,
/// `PDF/X-3:2002` allows CMYK, spot, calibrated (managed) RGB, CIELAB, + ICC Profiles
X3_2002_PDF_1_3,
/// `PDF/X-1a:2003` Revision of `PDF/X-1a:2001` based on PDF 1.4
X1A_2003_PDF_1_4,
/// `PDF/X-3:2003` Revision of `PDF/X-3:2002` based on PDF 1.4
X3_2003_PDF_1_4,
/// `PDF/X-4:2010` Colour-managed, CMYK, gray, RGB or spot colour data are supported
/// as well as PDF transparency and optional content (layers)
X4_2010_PDF_1_4,
/// `PDF/X-4p:2010` Same as the above X-4:2010, but may reference an ICC profile from
/// an external file, and it's based on PDF 1.6
X4P_2010_PDF_1_6,
/// `PDF/X-5g:2010` An extension of PDF/X-4 that enables the use of external graphical
/// content. This can be described as OPI-like (Open Prepress Interface) workflows.
/// Specifically this allows graphics to be referenced that are outside the PDF
X5G_2010_PDF_1_6,
/// `PDF/X-5pg` An extension of PDF/X-4p that enables the use of external graphical
/// content in conjunction with a reference to an external ICC Profile for the output intent.
X5PG_2010_PDF_1_6,
/// `PDF/X-5n` An extension of PDF/X-4p that allows the externally supplied ICC
/// Profile for the output intent to use a color space other than Greyscale, RGB and CMYK.
X5N_2010_PDF_1_6,
/// `PDF/E-1:2008` 3D Objects, geospatial, etc.
E1_2008_PDF_1_6,
/// `PDF/VT-1:2010` Basically a way to make a incomplete PDF as a template and the RIP program
/// is set up in a way that it can easily inject data into the PDF, for high-throughput PDFs
/// (like postcards, stamps), that require customization before printing
VT_2010_PDF_1_4,
/// Custom PDF conformance, to allow / disallow options. This allows for making very small
/// documents, for example
Custom(CustomPdfConformance),
}
// default: save on file size
impl Default for PdfConformance {
fn default() -> Self {
Self::Custom(CustomPdfConformance::default())
}
}
/// Allows building custom conformance profiles. This is useful if you want very small documents for example and
/// you don't __need__ conformance with any PDF standard, you just want a PDF file.
#[derive(Debug, PartialEq, Eq, Clone)]
pub struct CustomPdfConformance {
/// Identifier for this conformance
///
/// Default: __""__
pub identifier: String,
/// Does this standard allow 3d content?
///
/// Default: __false__
pub allows_3d_content: bool,
/// Does this standard allow video content?
///
/// Default: __false__
pub allows_video_content: bool,
/// Does this standard allow audio content
///
/// Default: __false__
pub allows_audio_content: bool,
/// Does this standard allow enbedded JS?
///
/// Default: __false__
pub allows_embedded_javascript: bool,
/// Does this standard allow enbedding JPEG files?
///
/// Default: __true__
pub allows_jpeg_content: bool,
/// Does this standard require XMP metadata to be set?
///
/// Default: __true__
pub requires_xmp_metadata: bool,
/// Does this standard allow the default PDF fonts (Helvetica, etc.)
///
/// _(please don't enable this if you do any work that has to be printed accurately)_
///
/// Default: __false__
pub allows_default_fonts: bool,
/// Does this standard require an ICC profile to be embedded for color management?
///
/// Default: __true__
pub requires_icc_profile: bool,
/// Does this standard allow PDF layers?
///
/// Default: __true__
pub allows_pdf_layers: bool,
}
impl Default for CustomPdfConformance {
fn default() -> Self {
CustomPdfConformance {
identifier: "".into(),
allows_3d_content: false,
allows_video_content: false,
allows_audio_content: false,
allows_embedded_javascript: false,
allows_jpeg_content: true,
requires_xmp_metadata: false,
allows_default_fonts: false,
requires_icc_profile: false,
allows_pdf_layers: true,
}
}
}
impl PdfConformance {
/// Get the identifier string for PDF
pub fn get_identifier_string(&self) -> String {
// todo: these identifiers might not be correct in all cases
let identifier = match *self {
PdfConformance::A1B_2005_PDF_1_4 => "PDF/A-1b:2005",
PdfConformance::A1A_2005_PDF_1_4 => "PDF/A-1a:2005",
PdfConformance::A2_2011_PDF_1_7 => "PDF/A-2:2011",
PdfConformance::A2A_2011_PDF_1_7 => "PDF/A-2a:2011",
PdfConformance::A2B_2011_PDF_1_7 => "PDF/A-2b:2011",
PdfConformance::A2U_2011_PDF_1_7 => "PDF/A-2u:2011",
PdfConformance::A3_2012_PDF_1_7 => "PDF/A-3:2012",
PdfConformance::UA_2014_PDF_1_6 => "PDF/UA",
PdfConformance::X1A_2001_PDF_1_3 => "PDF/X-1a:2001",
PdfConformance::X3_2002_PDF_1_3 => "PDF/X-3:2002",
PdfConformance::X1A_2003_PDF_1_4 => "PDF/X-1a:2003",
PdfConformance::X3_2003_PDF_1_4 => "PDF/X-3:2003",
PdfConformance::X4_2010_PDF_1_4 => "PDF/X-4",
PdfConformance::X4P_2010_PDF_1_6 => "PDF/X-4P",
PdfConformance::X5G_2010_PDF_1_6 => "PDF/X-5G",
PdfConformance::X5PG_2010_PDF_1_6 => "PDF/X-5PG",
PdfConformance::X5N_2010_PDF_1_6 => "PDF/X-5N",
PdfConformance::E1_2008_PDF_1_6 => "PDF/E-1",
PdfConformance::VT_2010_PDF_1_4 => "PDF/VT",
PdfConformance::Custom(ref c) => &c.identifier,
};
identifier.to_string()
}
/// __STUB__: Detects if the PDF has 3D content, but the
/// conformance to the given PDF standard does not allow it.
pub fn is_3d_content_allowed(&self) -> bool {
match *self {
PdfConformance::E1_2008_PDF_1_6 => true,
PdfConformance::Custom(ref c) => c.allows_3d_content,
_ => false,
}
}
/// Does this conformance level allow video
pub fn is_video_content_allowed(&self) -> bool {
// todo
match *self {
PdfConformance::Custom(ref c) => c.allows_video_content,
_ => false,
}
}
/// __STUB__: Detects if the PDF has audio content, but the
/// conformance to the given PDF standard does not allow it.
pub fn is_audio_content_allowed(&self) -> bool {
// todo
match *self {
PdfConformance::Custom(ref c) => c.allows_audio_content,
_ => false,
}
}
/// __STUB__: Detects if the PDF has 3D content, but the
/// conformance to the given PDF standard does not allow it.
pub fn is_javascript_content_allowed(&self) -> bool {
// todo
match *self {
PdfConformance::Custom(ref c) => c.allows_embedded_javascript,
_ => false,
}
}
/// __STUB__: Detects if the PDF has JPEG images, but the
/// conformance to the given PDF standard does not allow it
pub fn is_jpeg_content_allowed(&self) -> bool {
// todo
match *self {
PdfConformance::Custom(ref c) => c.allows_jpeg_content,
_ => true,
}
}
/// Detects if the PDF must have XMP metadata
/// if it has to conform to the given PDF Standard
pub fn must_have_xmp_metadata(&self) -> bool {
match *self {
PdfConformance::X1A_2001_PDF_1_3 => true,
PdfConformance::X3_2002_PDF_1_3 => true,
PdfConformance::X1A_2003_PDF_1_4 => true,
PdfConformance::X3_2003_PDF_1_4 => true,
PdfConformance::X4_2010_PDF_1_4 => true,
PdfConformance::X4P_2010_PDF_1_6 => true,
PdfConformance::X5G_2010_PDF_1_6 => true,
PdfConformance::X5PG_2010_PDF_1_6 => true,
PdfConformance::Custom(ref c) => c.requires_xmp_metadata,
_ => false,
}
}
/// Check if the conformance level must have an ICC Profile
pub fn must_have_icc_profile(&self) -> bool {
// todo
match *self {
PdfConformance::X1A_2001_PDF_1_3 => false,
PdfConformance::Custom(ref c) => c.requires_icc_profile,
_ => true,
}
}
/// __STUB__: Detects if the PDF has layering (optional content groups),
/// but the conformance to the given PDF standard does not allow it.
pub fn is_layering_allowed(&self) -> bool {
match self {
PdfConformance::X1A_2001_PDF_1_3 => false,
PdfConformance::X3_2002_PDF_1_3 => false,
PdfConformance::X1A_2003_PDF_1_4 => false,
PdfConformance::X3_2003_PDF_1_4 => false,
PdfConformance::Custom(c) => c.allows_pdf_layers,
_ => true,
}
}
}