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Java Forum / General / December 2005CSS or CSS2 and XML in Java
hi, is there a a way to read a styled (by CSS) XML file, and get it fully substituted, all in one (or two) step ? Or have I to do it myself ? I'm trying to read MathML-presentation documents, that can come with a css (either embedded, or linked in). I would like to have the file read, and all styled attribute set following CSS rules. Is it possible ? thx > hi, > [quoted text clipped - 7 lines] > > Is it possible ? I don't think I really understand your question so I don't know if this will help. My memory on this is very hazy but I believe the recommended approach for controlling the appearance of XML is to use XSL, not CSS. If you want to apply an XSL stylesheet to XML very easily - once you've actually written the XSL - you can do this; it's not Java but it works! ======================================= <html> <body><script type="text/javascript">// Load XML var xml = new ActiveXObject("Microsoft.XMLDOM") xml.async = false xml.load("Foo.log.xml") // Load XSL var xsl = new ActiveXObject("Microsoft.XMLDOM") xsl.async = false xsl.load("JavaLogger.xsl") // Transform document.write(xml.transformNode(xsl))</script> </body> </html> ======================================= The name of the XML file in this example is 'Foo.log.xml' and the name of the XSL file is 'JavaLogger.xsl'. This small script is real code that I wrote myself for a project a while back. Rhino hi, thanks, but that's not really what I need. I'm working in a standalone application. I wan't to show a MathML-presentation (for the moment this standard piece of XML, but I'm still interested in any kind of XML). If the MathML XML source is styled (through processing-instruction for instance), how can I apply CSS rules to this document ! I'd like to avoid doing-it by myself. I've heard about SAC, but there are too few implementations. > hi, > > is there a a way to read a styled (by CSS) XML file, and get it fully > substituted, all in one (or two) step ? I strongly doubt it. Perhaps in a couple hundred steps. > Or have I to do it myself ? Very likely. > I'm trying to read MathML-presentation documents, that can come with a > css (either embedded, or linked in). I would like to have the file > read, and all styled attribute set following CSS rules. > > Is it possible ? See http://www.w3schools.com/xml/xml_display.asp particularly the part that says: <quote> Note: Formatting XML with CSS is NOT the future of how to style XML documents. XML document should be styled by using the W3C's XSL standard! </quote> It's possible, but not the recommended way of doing things. Incidentally, I don't think Java has built in support for XSL either. - Oliver >I'm trying to read MathML-presentation documents, that can come with a >css (either embedded, or linked in). I would like to have the file >read, and all styled attribute set following CSS rules. > >Is it possible ? I would say no simply because you can describe fancy layouts in CSS for which there is no HTML equivalent. You might though be able to roughly express it. Another approach might be to see if you can convert your CSS to PDF which can be viewed without CSS. If you generate your web pages it may be easier to simply generate two versions.  SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. hi, I don't think CSS is dead, and that XSL stands right for what I need to do. I know how to handle XSL in java (it is built in since 1.4 IMHO) I am not generating any web page. I want to get some "raw" MathML-presentation and and present beautified MathML presentation (like color attribute for some elements etc...) as described in a CSS file. it is possible to mix CSS and MathML-presentation (at least) see appendix G in w3c MathML 2.0 spec <http://www.w3.org/TR/2003/REC-MathML2-20031021/appendixg.html> I was wondering that CSS is a powerfull yet simple way to customize rendering (in HTML and in MathML presentation too). Is there a generic library that can parse any XML file, find style data (maybe we can help parser to find styles), parse style data, AND apply CSS rules. > I don't think CSS is dead, and that XSL stands right for what I need to > do. I know how to handle XSL in java (it is built in since 1.4 IMHO) I'm not saying CSS is dead; in fact, W3C is actively working on CSS3. I'm just saying that the W3C also recommends that you do NOT use CSS to format XML data, and that you DO use XSL to format it (as indicated in the link I made in another post in this thread). I went to the javadocs, http://java.sun.com/j2se/1.5.0/docs/api/index.html, and did a search for "XSL", and found zero results. Where do you see XSL support built into Java? > I was wondering that CSS is a powerfull yet simple way to customize > rendering (in HTML and in MathML presentation too). Is there a generic > library that can parse any XML file, find style data (maybe we can help > parser to find styles), parse style data, AND apply CSS rules. Applying CSS rules to a document only makes sense in the context where you want to DISPLAY the document. In other words, it does not make sense to apply CSS to the in-memory tree-like representation of an XML document. The CSS language, for example, allows you to place conditionals on the style rules depending on whether the document should be displayed on screen, or on paper, something which cannot possibly known before the time comes to actually print or display the document. Once we have a better idea of what you are doing to display your MathML documents (because I'm pretty sure MathML is not built into Java either), we might be able to further advise you with regards to CSS, but my initial claim still stands: You'll get more support using XSL to manipulate the presentation of XML documents than you will with CSS. - Oliver >Where do you see XSL support built into Java? http://java.sun.com/j2se/1.5.0/docs/api/javax/xml/transform/TransformerFactory.html >Once we have a better idea of what you are doing to display your MathML >documents I do want to display MathML ! I'm building a java MathML viewer ! Thats why I need CSS I've been looking a lot around, and didn't find any java implementation of a CSS parser that I could apply to my MathML tree I'm starting to think that it does not exist, I'll have to implement CSS support by myself, but I can't keep thinking that it is possible to build a generic CSS support ! > >Where do you see XSL support built into Java? > http://java.sun.com/j2se/1.5.0/docs/api/javax/xml/transform/TransformerFactory.html [quoted text clipped - 5 lines] > I've been looking a lot around, and didn't find any java implementation > of a CSS parser that I could apply to my MathML tree You won't find *any* implementation for *any language of a CSS parser that you could apply to a MathML tree MathML is an XML markup-language for mathematics, and not a visual renderer You use xsl(t) to transform it into something that can be visualy rendered, and possibly apply a css stylesheet to that. > I'm starting to think that it does not exist, I'll have to implement It doesn't > CSS support by myself, but I can't keep thinking that it is possible to > build a generic CSS support ! It just doesn't make sense to use css on a mathML document... SignatureDag. I don't agree with you, Dag !! MathML-presentation IS a visual renderer with color tricks and font size style etc.... as well as HTML ! I know how to "apply" by hand CSS rules to a MathML tree ! There is absolutely no contradiction. I'm looking for a tool that help me to process this rules by computer ! >It just doesn't make sense to use css on a mathML document... It does to me, sorry >I don't agree with you, Dag !! > MathML-presentation IS a visual renderer with color tricks and font [quoted text clipped - 6 lines] >>It just doesn't make sense to use css on a mathML document... > It does to me, sorry Can you please post some links or show me how to "apply" those css-rules to MathML documents by hand? I'm not trying to be sarcastic here, I'm really interested i how you do this! Or maybe I'm just grossly misunderstand what you mean...? SignatureDag. look at : it is possible to mix CSS and MathML-presentation (at least) see appendix G in w3c MathML 2.0 spec http://www.w3.org/TR/2003/REC-MathML2-20031021/appendixg.html >> >Where do you see XSL support built into Java? >> http://java.sun.com/j2se/1.5.0/docs/api/javax/xml/transform/TransformerFactory.html [quoted text clipped - 5 lines] >> I've been looking a lot around, and didn't find any java implementation >> of a CSS parser that I could apply to my MathML tree Ever heard of WebEQ? http://www.webeq.com/en/products/webeq/ yep, and many others, but they don't fit my requirements : 1- must be a reusable component that I can embbed in my apps 2- the component must edit a constrained subset of mathml (for instance, sometimes I want to allow a=b+c, but not a+b=c+d ) 3- it is destinated to our customers I thought (I'm evaluating) that it would be easier to have my own editor ... but I might be wrong (but you're right, I can see that I've said "viewer", Sorry. But the target remains to have an editor/viewer, and the first step is to have a viewer > >Where do you see XSL support built into Java? > http://java.sun.com/j2se/1.5.0/docs/api/javax/xml/transform/TransformerFactory.html Okay, thanks. >>Once we have a better idea of what you are doing to display your MathML >>documents [quoted text clipped - 3 lines] > I've been looking a lot around, and didn't find any java implementation > of a CSS parser that I could apply to my MathML tree So you're implementing your own viewer from scratch, right? So wouldn't it be your job to implement applying the styles to your view as well? What I'm getting at is that it doesn't seem reasonable to try to seperate the concern of taking an XML document and from that, putting pixels on the screen with the concern of deciding what set of pixels to put on the screen. The best you could hope for, I suspect, is a CSS parser; but you still need to manually interpret the CSS data you've got and apply that to your own graphical representation of the math formulas. - Oliver Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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