I have a MediaWiki site hosted on ShoutWiki. I want to create a template that will return a table, with rows filtered by the template's single argument. The table could be stored in whatever format works. It will have three columns, and I want to display rows only if the template's argument is a substring of the text in the first cell in the row. The search needs to be case sensitive.
There are JavaScript solutions for this, but I'd like to do it on the server if possible.
If you don't have a special extension handling that (e.g. Scribunto adding Lua support and therefore a real programming language to MediaWiki), you need to encapsulate each row into an own template call.
Example:
Template:FilteredRow
{{#ifeq:{{{1|}}}|{{{2|}}}|<tr><td>{{{2|empty row}}}</tr></td> }}
Template:A_Table
<table>
{{FilteredRow|1={{{filter|}}}|2=some content here}}
{{FilteredRow|1={{{filter|}}}|2=some content here in row 2}}
{{FilteredRow|1={{{filter|}}}|2=some content here in row 3}}
{{FilteredRow|1={{{filter|}}}|2=baz}}
</table>
Using:
{{A_Table|filter=baz}}
Result:
<table>
<tr><td>baz</td></tr>
</table>
With Scribunto, you could simply save your table as HTML table, or JSON, or whatever parser you find. Note that JSON support (recognition, formatting, validation) in MediaWiki and user namespace is being worked on.
Related
I am new to StringTemplate template engine and want to use it for generating an html document with a table. I want to alter the style of the table rows depending on whether it is odd or even. I found a discussion on the stringtemplate-interest mailing list that describes the general approach ([stringtemplate-interest] Odd even row formatting).
But I have an additional requirement which breaks this general approach (I think). I want to render rows depending on the existence of a value. So I am working with a conditional expression $if(expr)$. My template looks like this.
delimiters „$“,“$“
htmlTable(valueA, valueB, valueC, valueD) ::= <<
<table>
<tr styleClass='odd'><td>$valueA$</td></tr>
$if(valueB)$
<tr><td>$valueB$</td></tr>
$endif$
<tr styleClass='odd'><td>$valueC$</td></tr>
<tr><td>$valueD$</td></tr>
</table>
>>
In the given template I can not use the hard coded styleClass attribute, because it would render the table wrong if the valueB parameter does not exist.
Is my requirement realizable with a template engine like StringTemplate, which focus on separation of model and view? Or is there too much model in the requirement as to implement it in the view? I know how to do it in other template engines (i. e. FreeMarker or Apache Velocity) or I might use some fancy CSS or javascript stuff but I would rather keep the model-view separation and use StringTemplates internal instruments.
I have a table that stores html templates in a mysql database. Now I have to perform some text replacement on them. However my target text is also present in some of the anchor tags and I don't want that to be replaced.
EX :
<body> ... (has huge html crap)... .........(Some more html crap) ... (a bit more of html crap) ... </body>
Task is to replace the occurrences of the "KEYWORD" with "NEW KEYWORD" in the body but not the urls.
It would also be helpful if I can first find such cases where the KEYWORD is a part of a link in a given template.
MySQL is not capable of such advanced string manipulation.
However, if you were to have a one-time-use PHP script do the editing (ie. select from the table, for each row process and update), you can do this:
// foreach row as $row
$newtext = preg_replace("(<a\b.*?>(*SKIP)(*FAIL)|KEYWORD)","NEW KEYWORD",$row['data']);
What this does is look for links (very approximate Regex but should suffice in almost all cases here), then skip over them. Then, it looks for KEYWORD and replaces it with NEW KEYWORD.
You can use this to quickly and easily handle the replacement.
If that "almost all cases" thing above turns out to not be enough, you can use DOMDocument to load the HTML into a parser and process text nodes only from there.
Maybe you could find the cases where the KEYWORD is a part of a link with something like this:
SELECT * FROM tbl WHERE html REGEXP '<a[^>]*KEYWORD';
I'm developing an iOS app that needs to display HTML content inside a HTML powered textview (DTCoreText).
For whatever reaso nthe client has decided to provide videos inside special HTML comments that I'm supposed to turn into a tag.
The comment format is as such
<!-- placeholder_video:url_of_video.mp4 -->
I was hoping I could write a regex to match the entire comment, extract the content and replace it with a element pointing to the correct URL through NSRegularExpression's stringByReplacingMatchesInString:options:range:withTemplate: but I can't for the life of me figure out Regular Expressions.
The best I could come up with is
(?<=<!-- placeholder_video:)(.*)(?=-->)
Which matches the comment's content (the mp4 URL), but I need it to match the entire comment instead and extract the content as a sub pattern (that I would later access through \1 if I understand correctly) so I can use a replace pattern to quickly replace the comment with the proper <video src="url_of_video.mp4"> string
Can it be done? Or am I better off trying to do it in two passes instead? (match the entire comment then run another regex on that comment to extract the URL and replace the former?
Based on the way your question looks right now (Having forgotten to paste the example of how the comment looks) it's hard to give a good answer.
But since you mention that this:
(?<=<!-- placeholder_video:)(.*)(?=-->)
will manage to fetch the content of the comment. And since you say all you want is to capture the entire comment.
Then if I understand this correctly I would say all you really need to do is add a capturing group around your entire expression and drop the lookback and lookahead.
(Maybe also avoid grabbing the leading and trailing spaces)
(<!-- placeholder_video:\s*(.*)\s*-->)
When testing with the following:
<!-- placeholder_video: url_of_video.mp4 -->
I will get 2 groups:
1: <!-- placeholder_video: url_of_video.mp4 -->
2: url_of_video.mp4
You can also give your groups names if you like, to make it easier to reference them:
(?<comment><!-- placeholder_video:\s*(?<url>.*)\s*-->)
It is also true that you can use \n to reference group n inside the regular expression.
If you plan to replace the first capturing group with the second one in a single regex, then how you do it would depend on the language. Some languages like C# will allow you to provide your own replacing method, which is one option. But I'm assuming you're not in C# here.
In Javascript you can simply use $n to reference the n'th matched group as the replaced value. (You can also provide a function, but you don't need to)
A full working example in JS (Using jQuery but not needed):
<div id="example">
<!-- placeholder_video: url_of_video.mp4 -->
</div>
<script>
var str = $("#example").html();
var str2 = str.replace(/(<!-- placeholder_video:\s*(.*)\s*-->)/g, "<video src=\"$2\">");
alert(str2);
</script>
You can see the working jsfiddle example here: http://jsfiddle.net/72WeZ/
I've searched but cannot find an answer.
How do I print an HTML Table with page breaks based on the value of a particular cell.
Basically I want to print a list of addresses and have a new page when the road name changes.
You can’t do this in HTML or in CSS. You need to mark the page breaks when generating the table or with client-side JavaScript. In either case, you just need to store the road name (which you need to get from somewhere according to the structure of the date). When processing a new row, you then just check the road name in its data against the stored value, and if they differ, emit
<tr style="page-break-before: always">
instead of a simple <tr> or, when doing this client-side, modify the style property of the tr element node accordingly.
I have a script that generates an array of objects that I want to email out in HTML format. That part works fine. I am trying to modify the HTML string to make certain rows a different font color.
Part of the html string looks like this (2 rows only):
<tr>
<td>ABL - Branch5206 Daily OD Report</td>
<td>'\\CTB052\Shared_Files\FIS-BIC Reporting\Report Output Files\ABL\Operations\Daily\ABL - Branch5206 Daily OD Report.pdf'</td>
<td>13124</td>
<td>4/23/2013 8:05:34 AM</td>
<td>29134</td>
<td>0</td>
<td>Delivered</td>
</tr>
<tr>
<td>ABL - Branch5206 Daily OD Report</td>
<td>'\\CTB052\Shared_Files\FIS-BIC Reporting\Report Output Files\ABL\Operations\Daily\ABL - Branch5206 Daily OD Report.xls'</td>
<td>15716</td>
<td>4/23/2013 8:05:34 AM</td>
<td>29134</td>
<td>0</td>
<td>Delivered</td>
</tr>
I tried regex to add a font color to the beginning and end of the rows where the row ends with "Delivered":
$email = [regex]::Replace($email, "<tr><td>(.*?)Delivered</td></tr>", '<tr><font color = green><td>$1Delivered</td></font></tr>')
This didn't work (I am not sure if you can set font color for a whole row like that).
Any ideas on how to do this easily/efficiently? I have to do it on several different statuses (like Delivered)
Disclaimer: HTML cannot be parsed by regular expression parser. A regular expression will NOT provide a general solution to this problem. If your HTML structure is well known and you don't have any other <tr></tr> elements, though, the following might work. On that note, though, is there some reason you can't modify the HTML generation to do this then instead of waiting until the HTML is already generated?
Try this command:
PS > $email = $email -replace '(?s)<tr>(.*?)<td>Delivered</td>(.*?)</tr>','<tr style="color: #FF0000">$1<td>Delivered</td>$2</tr>'
The first string is the pattern. The (?s) tells the parser to allow . to accept newlines; this is called "single line" mode. Then it grabs a <tr> element that contains the string <td>Delivered</td>. The two capture groups grab everything else in the <tr> element around the <td>Delivered</td> string. Take note of the question marks following the *s. * by itself is greedy and matches as much text as possible; *? matches as little text as possible. If we just used * here, it would treat your entire string as one match and only replace the first <tr>.
The second string is the replacement. It plops the <tr> element and its contents back in place with an added style attribute, and all without back ref.
One other minor note is the quoting. I tend toward single quotes anyway, but in this case, you're likely to have double quotes in the replacement string. So single quotes are probably the way to go.
As for how you could do this for different statuses, regular expressions really aren't designed for conditional content like that; it's like trying to use a screwdriver as a drill. You can hard code several replaces or loop over status/color pairs and build your pattern and replace strings from them. A full blown HTML parser would be more efficient if you can find one for .NET; you might try to get away with an XML parser if you can guarantee it's valid XML. Or, going back to my question at the beginning, you could modify the HTML generation. If your e-mails are few in number, though, this may not be a bottleneck worth addressing. Development time spent is also costly. See if it's fast enough and try a different route if not.
Credit where it's due: I took the HTML style attribute from #FrankieTheKneeMan.