SearchAndReplace

Search and Replace

Problem

There are a number of cases in which it is not possible to put a tag at a place in a page where you want to insert text. These include the inside of <script>, <style>, and '<![CDATA[' tags. Most of these cases can probably be handled by dynamically including the entire tag, since the contents are likely to either be irrelevent to structured editing or very hard to mark for dynamic replacement without ruining structured editing. For example, most editors will not parse (much less execute) scripts, and while they may use a stylesheet, it will be hard to make a valid stylesheet that is also dynamic.

Proposal

Case-by-case: Make a TAL statement that specifies placeholder/expression pairs, and replaces all contained instances of the placeholder text with the value of the expression.

For example:

      <disabled script tal:put="IMGDIR here/images/absolute_url">
      for (var i=0; i < elements.length; i++)
        if (elements[i].type == 'img')
          elements[i].src = 'IMGDIR' + elements[i].src;
      <disabled /script>

Notation: Make a TAL statement that specifies placeholder delimiters, and replaces all contained path expressions with the specified delimiters:

    <disabled script tal:paths="${ }">
    for (var i=0; i < elements.length; i++)
      if (elements[i].type == 'img')
        elements[i].src = '${here/images/absolute_url}' + elements[i].src;
    <disabled /script>

peterbe (Jul 16, 2001 3:49 am; Comment #1) Editor Remark Requested

-1 Why not something like this:

  <disabled script tal:replace="peter here/title">
   alert("You are in the peter page");
  <disabled /script>

 Which is rendered as::

  <disabled script>
   alert("You are in the My Title page");
  <disabled /script>

 Disabling the script and style tag will make it impossible to test (as in to test it **with** the script) offline zpt files in Dreamweaver or GoLive.

 Keeps the number of TAL operators down. Will it confuse with 'tal:replace="here/title"' ??

d.maurer (Jul 16, 2001 3:50 am; Comment #2)

 >       for (var i=0; i < elements.length; i++)
 >         if (elements[i].type == img)
 >           elements[i].src = IMGDIR + elements[i].src;

I would prefer, if replacement were not done based on literal text but would use the variable syntax used elsewhere in TALES, e.g. $IMGDIR would be replaced by the value of "IMGDIR".

Also note, that such replacements will often require context specific quoting. Probably, a set of quoting functions should be made available, including "url_quote", "html_quote", "string_quote".

d.maurer (Jul 16, 2001 3:51 am; Comment #3)

 >    o Notation: Make a TAL statement that specifies placeholder delimiters, and
 >    replaces all contained path expressions with the specified delimiters::
 > 
 >     <disabled script tal:paths="${ }">
 >     for (var i=0; i < elements.length; i++)
 >       if (elements[i].type == img)
 >         elements[i].src = ${here/images/absolute_url} + elements[i].src;
 >     <disabled /script>

subject:

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