On Jun 18, 2006, at 6:27 AM, Terry Vogelaar wrote:
Hi all,
I've got a scripting problem that seems ridiculously simple.
I have to find the corresponding end tag in a HTML file with nested
<SPAN> tags:
<SPAN class="FOOTNOTE">
<SPAN Class="reference">
origin
</SPAN>
<SPAN Class="quote">
<SPAN Class="smallcaps">
Text
</SPAN>
more text
</SPAN>
</SPAN>
Some of the tags are nested. How do I find the end tag of each SPAN
tag? The tag on line 1 has its end tag on line 11, but the first
time it sees </SPAN> is on line 4...
Terry,
A few months ago I was trying to emulate browser-like html rendering
and I needed a function like this. The function I wrote returns a
list of all instances of the tag you tell it to search for. Once I
got the list back I could do whatever I wanted with the tag pairs--
delete them, substitute formatting for tags, etc.
-- This function takes three parameters: (1) a string that describes
the opening tab, eg., "<img"
-- (2) a string describing the closing tag, eg., "</img>" and (3) a
string containing the html code
-- to be searched. It returns two items that indicate the beginning
and ending character
-- offsets of that tag.
function extractTag openTag, closeTag, htmlCode
put offset(openTag,htmlCode) into openTagPosList
if openTagPosList = 0 then return 0
put offset(closeTag,htmlCode) into closeTagPosList
put openTagPosList into openTagSearchStart
put closeTagPosList into closeTagSearchStart
put 1 into i
repeat -- find all opening and closing tags
put offset(openTag,htmlCode,openTagSearchStart) into
openTagFoundChar
if openTagFoundChar = 0 then exit repeat
put openTagSearchStart + openTagFoundChar into openTagSearchStart
put offset(closeTag,htmlCode,closeTagSearchStart) into
closeTagFoundChar
put closeTagSearchStart + closeTagFoundChar into
closeTagSearchStart
add 1 to i
put openTagSearchStart into item i of openTagPosList
put closeTagSearchStart into item i of closeTagPosList
end repeat
repeat with i = 1 to number of items in openTagPosList
put "o" after item i of openTagPosList
put "e" after item i of closeTagPosList
end repeat
put openTagPosList & comma & closeTagPosList into tagsList
sort items of tagsList numeric
return tagsList
end extractTag
Hope this works for you.
Devin
Devin Asay
Humanities Technology and Research Support Center
Brigham Young University
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