[WIP] bleed support

[typemytype]

not working yet

possible we have to set all: mediaBox, bleedBlox, trimBox

so far its seems not be possible to make one for each page... if so, it should raise that bleed is not possible for every page except the first one

[typemytype]

and other pdf attributes could be added https://developer.apple.com/documentation/coregraphics/cgpdfcontext/auxiliary_dictionary_keys?language=objc

like author, title, creator...

[justvanrossum]

The doco says "The bleed box for the document or for a given page." so it must be possible to set it on a per-page basis.

[justvanrossum]

Maybe it should be added "manually" in the page dictionary, which can be retrieved with CGPDFPageGetDictionary

[justvanrossum]

I see we use CGContextBeginPage to start a new page. But there is also CGPDFContextBeginPage which allows a pageInfo dict to be passed: https://developer.apple.com/documentation/coregraphics/1456578-cgpdfcontextbeginpage?language=objc

[typemytype]

tried bleed again, still not working

a low level try out...

the title and author ends up in the pdf but not the bleed settings

import Quartz
import AppKit

width = 300
height = 300
leftBleed, topBleed, rightBleed, bottomBleed = 5, 5, 5, 5

mediaBox = Quartz.CGRectMake(0, 0, width + leftBleed + rightBleed, height + topBleed + bottomBleed)
bleedBox = Quartz.CGRectMake(leftBleed, topBleed, width, height)



"""
https://developer.apple.com/documentation/coregraphics/cgpdfcontext/auxiliary_dictionary_keys?language=objc
"""
auxiliaryInfo = {
    Quartz.kCGPDFContextTitle: "my title",
    Quartz.kCGPDFContextAuthor: "DrawBot",
}

pageAuxiliaryInfo = {
    Quartz.kCGPDFContextMediaBox: AppKit.NSValue.valueWithRect_(mediaBox),
    Quartz.kCGPDFContextBleedBox: AppKit.NSValue.valueWithRect_(bleedBox),    
    Quartz.kCGPDFContextTrimBox: AppKit.NSValue.valueWithRect_(mediaBox),
    
}      

print(pageAuxiliaryInfo)      

auxiliaryInfo = Quartz.NSDictionary.dictionaryWithDictionary_(auxiliaryInfo)

_pdfData = Quartz.CFDataCreateMutable(None, 0)
dataConsumer = Quartz.CGDataConsumerCreateWithCFData(_pdfData)

_pdfContext = Quartz.CGPDFContextCreate(dataConsumer, mediaBox, auxiliaryInfo)

Quartz.CGPDFContextBeginPage(_pdfContext, pageAuxiliaryInfo)


Quartz.CGContextMoveToPoint(_pdfContext, 50, 50)
Quartz.CGContextAddLineToPoint(_pdfContext, 150, 50)
Quartz.CGContextAddLineToPoint(_pdfContext, 150, 150)
Quartz.CGContextClosePath(_pdfContext)

Quartz.CGContextSetFillColorWithColor(_pdfContext,
    Quartz.CGColorCreateGenericRGB(1, 0, 0, 1)
)

Quartz.CGContextFillPath(_pdfContext)

Quartz.CGPDFContextEndPage(_pdfContext)
Quartz.CGPDFContextClose(_pdfContext)

path = 'example.pdf'
_pdfData.writeToFile_atomically_(path, True)


for path in [path,]:
    url = AppKit.NSURL.fileURLWithPath_(path)
    pdf = Quartz.CGPDFDocumentCreateWithURL(url)
    page = Quartz.CGPDFDocumentGetPage(pdf, 1)


    boxes = [    
        Quartz.kPDFDisplayBoxMediaBox,
        Quartz.kPDFDisplayBoxCropBox,
        Quartz.kPDFDisplayBoxBleedBox,
        Quartz.kPDFDisplayBoxTrimBox,
        #Quartz.kPDFDisplayBoxArtBox,
    ]
    print(path)
    for box in boxes:
        (x, y), (w, h) = Quartz.CGPDFPageGetBoxRect(page, box)        
        print("  ", box, x, y, w, h)