[pmwiki-users] text replace using regex in edit textarea

[Hans Bracker]

thank you Petko, you are genius! It works just fine!
I am using a different regex though, from what you proposed, in order to 
preserve empty lines between paragraphs, when selecting multiple paragraphs:

.replace(/([^\s])\n([^\s])/g, "$1 $2")

Hans

On 23/01/2026 17:36, Petko Yotov wrote:
> I would reuse the core JavaScript GUIEdit functions and the PmLib 
> helpers available since PmWiki 2.4.0 (latest recommended).
>
> Create a file, say pub/myrxreplace.js, and put in it something like this:
>
>   PmLib.ready(function(){
>     const { dqs, dce, adjbe, tap } = PmLib; // import helpers
>
>     const container = dqs('span.GUIButtons');
>     if(!container) return;
>     const button = dce('input', {type:'button', value:'RXR'});
>     adjbe(container, button); // add before the end of GUIButtons
>
>     function replace_in_selection(selection) {
>       if(selection==='') return '';
>       let result = selection
>         .replace(/\r\n?/g, "\n") // normalize line breaks
>         .replace(/ *(\n *)+/g, ' ')    // join lines
>         .replace(/pmwiki/ig, 'PmWiki') // fix capitalization
>         // add your own
>       ;
>       return result;
>     }
>
>     tap(button, function(){ // onclick
>       insMarkup(replace_in_selection);
>     });
>   });
>
> Enable this script in local/config.php, assumes $EnableGUIButtons is 
> enabled:
>
>   if($action=='edit') $HTMLHeaderFmt['myrxreplace']
>      = '<script src="$PubDirUrl/myrxreplace.js"></script>';
>
> The "const button..." part is the button added to the end of the GUI 
> buttons container. The value 'RXR' is the button label, obviously you 
> can change it, or even use an emoji.
>
> Select some text in the edit textarea and click on the button. This 
> will cause the function replace_in_selection() to be called with 
> argument the current selection text. It should make the replacements 
> and changes, then return the result which will be inserted in place of 
> the selection in the edit textarea.
>
> I would also enable $EnablePreviewChanges = 1; and press "Preview" to 
> see my changes before saving the page.
>
> Using the built-in helper functions is much simpler and easier than 
> doing it in plain JavaScript, you don't need to locate the textarea, 
> detect the selection, handle undo/redo, sync with PmSyntax, everything 
> works under the hood.
>
> Petko
>
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