Transparent background in PDF previews

[audungk]

What did you do?

I created a PDFDocument, and rendered it. When the preview was displayed in Mail for macOS, the background was transparent.

What did you expect to happen?

I expected the background to be white, or a a possibility to set a fill coloraturas

What happened instead?

The background was transparent

TPPDF Environment

TPPDF version: 2.3.1 ℹ
Xcode version: 12 ℹ
Swift version: 5 ℹ

Demo Code / Project

let document = PDFDocument(format: .a4)
document.set(font: Font.systemFont(ofSize: 12))
document.add(text: "Hello World")
let generator = PDFGenerator(document: document)
do {
    return try generator.generateURL(filename: "Utlånserklæring.pdf")
} catch {
    print(error)
}

[philprime]

Hi there! Thanks for opening up this issue.

This should definitely be a feature so it is possible to set a paper/background color.

[philprime]

I am thinking about looking further into this and therefore RFC:

API

First off I would add a property background to the PDFDocument class with the following structure:

struct PDFDocumentBackground {
    var color: Color?
}

This allows to add more background alternatives further down the road as they can easily be added next to color.

Example:

let document = PDFDocument(format: .a4)
document.set(font: Font.systemFont(ofSize: 12))
document.add(text: "Hello World")
document.background.color = .green // <----

[audungk]

Sensible! Looks good to me!

[philprime]

I created a pull request PR #277.
Can you please test it?

[stefanovnt]

I am really interested in this feature, I have tested it and it's working correctly for me 👌

[philprime]

@stefanovnt thank you for your feedback!

I will go ahead and review the PR once more and merge it soon