Add possibility to override config settings in Fluid template

[maechler]

It should be possible to overwrite settings defined in plugin.tx_pdfviewhelpers.settings.config within the Fluid template. E.g.

<pdf:document config="{class: 'Vendor\Extension\YourClass'}"></pdf:document>

or

<pdf:config key="class" value="Vendor\Extension\YourClass"></pdf:config>

[maechler]

Unfortunately this is not very easy to implement. Fluid initialises all child ViewHelper arguments (using initializeArguments) before it calls initialize on the top most ViewHelper. But only in the method initialize we get acccess to the ViewHelper arguments that enable us to overwrite the settings. Thus all ViewHelper arguments of the children are already initialized with their corresponding default value before we can overwrite the default settings used.

We would have to rewrite the entire initialization of the ViewHelper arguments, I do not think that this feature is worth that. We should however move some config settings to a ViewHelper where they can be overwritten using Fluid attributes.
The config language and hyphenFile should be moved to the DocumentViewHelper in order to be able to generate multi language PDF documents as a batch job.

pdfviewhelpers/Configuration/TypoScript/setup.txt

Lines 2 to 25 in 2ead3fc

	config {
	class = Bithost\Pdfviewhelpers\Model\EmptyFPDI
	language = ger
	hyphenFile = hyph-de-ch-1901.tex
	disableCache = 1
	jpgQuality = 100
	sRGBMode = 0
	allowedImageTypes {
	image = jpg,png,gif
	imageEPS = ai,eps
	imageSVG = svg
	}
	fonts {
	subset = 1
	addTTFFont {
	# roboto {
	# path = EXT:pdfviewhelpers/Resources/Public/Examples/FullFeatureShowCase/Roboto.ttf
	# }
	# opensans {
	# path = EXT:pdfviewhelpers/Resources/Public/Examples/FullFeatureShowCase/OpenSans.ttf
	# }
	}
	}
	}

@macjohnny What do you think?

[maechler]

Implemented as suggested.