Dear List,
This should be easy, I think, but I am tearing my hear out on this
one... I must be overlooking something obvious...
Question: is the first item inside $someparam a text-node or any other
node? Whitespace is considered a textnode also.
Input: I actually use saxon:parse to get XML out of a snippet like the
following:
<ins> A Textnode <u> another text node </u></ins>
Saxon (parse) turns this in the more useful:
<ins> A Textnode <u> another text node </u></ins>
Here's my function, the way I have it currently (I know it is wrong). I
cannot use current() or anything context-dependent there, it is illegal
in a function.
<xsl:function name="local:optional-new-font-tag">
<xsl:param name="current-node" />
<xsl:param name="stacked-styles" />
<xsl:choose>
<!-- HOWTO: if node starts with text before next node, or
only contains text -->
<xsl:when test="$current-node[text() | *][position() = 1]">
<xsl:text>NO TAG, JUST TEXT, WRITE FONT_DECL</xsl:text>
</xsl:when>
<xsl:otherwise>
<xsl:text>ANOTHER TAG, DO NOTHING</xsl:text>
</xsl:otherwise>
</xsl:choose>
</xsl:function>
Here's my calling template (also used for other tags):
<xsl:template match="u|ins" mode="layout">
<xsl:param name="style" />
<xsl:variable name="new-style"
select="local:stack-lxf-style($style, 'underlined')" />
<xsl:variable name="font-tag"
select="local:optional-new-font-tag(., $new-style)" />
<xsl:value-of select="$font-tag" />
</xsl:template>
Now, when there's a text-node following the "u" or "ins" nodes, I must
open a new font-declaration (LXF, some really weird non/partial-xml
format). In fact, I need to translate XHTML into this LXF format. In
case you are wondering, here's some background:
Input:
<em>emph text
<strong>some bold text and emph text
<ins>underline, bold and emph</ins>
</strong>
only emph
</em>
Output (partially correct, it works like this now):
<lxf-font type="italic" />emph text
<lxf-font type="italic|bold" />some bold text and emph text
<lxf-font type="italic|bold|underlined" />underline, bold, and emph
<lxf-font type="normal" /> <!-- from i|b|u -->
<lxf-font type="normal" /> <!-- from i|b -->
<lxf-font type="italic" />only emph
<lxf-font type="normal" /> <!-- from i -->
This format, with only opening tags and no closing or enclosing tags
(like in normal xml/html style) means that I have to stack the styles
when I encounter them. Also, when I get more styles in a row, like the
following example, I need to get only one statement, instead of three:
Input:
Normal text
<em><strong><ins>
underline, bold and emph text
</ins></strong>
only emph
</em>
Output (wrong):
Normal text
<lxf-font type="italic" />
<lxf-font type="italic|bold" />
<lxf-font type="italic|bold|underlined" />underline, bold, and emph text
<lxf-font type="normal" /> <!-- from i|b|u -->
<lxf-font type="normal" /> <!-- from i|b -->
<lxf-font type="italic" />only emph
<lxf-font type="normal" /> <!-- from i -->
Output (required, but I find it hard to get):
Normal text
<lxf-font type="italic|bold|underlined" />underline, bold, and emph text
<lxf-font type="italic" />only emph
<lxf-font type="normal" /> <!-- from i -->
In the correct output example, it show that return-to-normal is only
done at the end. Opening a new <lxf-font> statement just means: use this
font-style from here onwards. As you can see, winding up and unwinding
is not equal, making it a bit hard to to.
Though I do have a system running, it has trouble with nested
statements, like above. I think I can fix it as soon as I know how to
find if a node starts with a text or with a normal node. I tried
following-sibling::, ../ with local-name, following::, descendant::
(without self). But somewhere I lost the way to deal with it.
Any ideas are much appreciated,
Cheers!
Abel Braaksma
http://abelleba.metacarpus.com