[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Using Java in XSLT to determine font metrics
This is my first attempt at calling an external Java method to do work on behalf of a stylesheet. I'm not a Java developer so I think I need a fairly complete "cookbook" description of how to do this. My objective is to determine the exact length, in pixels, of a given string based on the font and font size in play. I'm sure I have two problems here. (1) to properly bind my stylesheet to a Java name space and (2) proper use of the Java methods that parse my font and return the metrics I'm looking for. Following is my failed stylesheet, annotated with comments explaining what I am "trying" to do at each step. I am very certain that I am not properly telling whomever which font I am using. I am working within the <oXygen/> IDE (Saxon8) and have successfully gotten the example on page 134 of Michael's XSLT 2.0 3rd Edition to work. This tells me that I am somewhat successful in using Java extensions. When I process this stylesheet I get the following error: Cannot find a matching 0-argument function named {ext://java.awt.FontMetrics}getFontMetrics() Unfortunately this error message doesn't tell me if the problem is that I'm not finding the Java method or if I'm finding it but not using it properly. <?xml version="1.0" encoding="UTF-8"?> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0" xmlns:FontMetrics="ext://java.awt.FontMetrics"> <xsl:output indent="yes"/> <xsl:template match="/"> <xsl:variable name="tstString" select="'Hello World'"/> <!-- declair a font and fontsize - not shure who is listening to this --> FontMetrics:Font("helveticaWorld", Font.PLAIN, 10) <!-- obtain the metrics for the specified font --> <xsl:variable name="metrics"> <xsl:value-of select="FontMetrics:getFontMetrics()"/> </xsl:variable> <!-- obtain the length in pixels of the test string --> <xsl:variable name="resultStringLength"> <xsl:value-of select="metrics.stringWidth($tstString)"/> </xsl:variable> <!-- display the result --> <xsl:message>result:<xsl:value-of select="$resultStringLength"/></xsl:message> </xsl:template> </xsl:stylesheet> Thanks in advance for you help. Please keep in mind that I am not a Java developer at all so nothing is obvious to me. Steve Ylvisaker [CONFIDENTIALITY AND PRIVACY NOTICE] Information transmitted by this email is proprietary to Medtronic and is intended for use only by the individual or entity to which it is addressed, and may contain information that is private, privileged, confidential or exempt from disclosure under applicable law. If you are not the intended recipient or it appears that this mail has been forwarded to you without proper authority, you are notified that any use or dissemination of this information in any manner is strictly prohibited. In such cases, please delete this mail from your records. To view this notice in other languages you can either select the following link or manually copy and paste the link into the address bar of a web browser: http://emaildisclaimer.medtronic.com
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