Bookmarklet Help: Creating a Find/Replace Bookmarklet

问题

I'm trying to slightly modify this so that it prompts for the text to search for, followed by the text to replace with, and when all done processing, show a dialog box letting me know it's done.

I plan to use it on a phpmyadmin database edit page that'll have any number of textboxes filled with text (which is what I need it to search and replace in). Also, the text to search for and replace may or may not be multi-line, so I've added the 'm' param in the regex, and also, since I'll be doing searches/replaces that may contain html, they'll often have quotes/double quotes in them. ex:

Search for:

<img height="76" width="92" src="http://www.gifs.net/Animation11/Hobbies_and_Entertainment/Games_and_Gambling/Slot_machine.gif" /></div>
<div class="rtecenter"> <strong><em><font color="#ff0000">Vegas Baby!<br />
</font></em></strong></div>

and maybe replace with nothing (just to erase all that code), or some other html. So far this is the bookmarklet I've come up with, (javascript, and especially bookmarklets aren't something I mess with often) however, it does nothing as far as finding/replacing, although it does do the prompting correctly.

javascript:var%20scrEl=document.createElement('script');scrEl.setAttribute('language','javascript');scrEl.setAttribute('type','text/javascript');scrEl.setAttribute('src','http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js');function%20htmlreplace(a,b,element){if(!element)element=document.body;var%20nodes=$(element).contents().each(function(){if(this.nodeType==Node.TEXT_NODE){var%20r=new%20RegExp(a,'gim');this.textContent=this.textContent.replace(r,b);}else{htmlreplace(a,b,this);alert('Done%20processing.');}});}htmlreplace(prompt('Text%20to%20find:',''),prompt('Replace%20with:',''));

Anyone have any ideas?

回答1:

Here is the most direct conversion of the original function to search/replace textarea and text inputs instead of HTML. I also added 'm' to regex and added alert('done') at end. However, I think that using 'm' may not solve your problem perfectly, but I may be wrong.

function htmlreplace(a, b, element) {
    if (!element) element = document.body;    
    var nodes = element.childNodes;
    for (var n=0; n<nodes.length; n++) {
        if ( nodes[n].type && (nodes[n].type.toLowerCase() == 'textarea' || nodes[n].type.toLowerCase() == 'text') ) {
            var r = new RegExp(a, 'gim');
            nodes[n].value = nodes[n].value.replace(r, b);
        } else {
            htmlreplace(a, b, nodes[n]);
        }
    }
}

htmlreplace(prompt('find'), prompt('replace'));
alert('done');

Here it is as a bookmarklet.

javascript:function htmlreplace(a,b,element){if(!element)element=document.body;var nodes=element.childNodes;for(var n=0;n<nodes.length;n++){if(nodes[n].type&&(nodes[n].type.toLowerCase()=='textarea'||nodes[n].type.toLowerCase()=='text')){var r=new RegExp(a,'gim');nodes[n].value=nodes[n].value.replace(r,b)}else{htmlreplace(a,b,nodes[n])}}}htmlreplace(prompt('find'),prompt('replace'));alert('done');

回答2:

This worked for me:

javascript:function%20htmlreplace(a,b,element){if(!element)element=document.body;var%20nodes=element.childNodes;for(var%20n=0;n<nodes.length;n++){if(nodes[n].nodeType==Node.TEXT_NODE){nodes[n].textContent=nodes[n].textContent.replace(new%20RegExp(a,'gi'),b);}else{htmlreplace(a,b,nodes[n]);}}}htmlreplace(prompt("Text%20to%20replace:","old"),prompt("Replacement%20text:","new"));

All I did was replace the old and new with a prompt() function. good bookmarklet.

回答3:

A search landed me here, and the stuff above is wrong (or at least outdated), and I went through the trouble of updating it until it worked, so I figured I'd paste it here:

javascript:var count=0;
function htmlreplace(a,b,element){
if(!element)element=document.body;
var nodes=element.childNodes;
for(var n=0;n<nodes.length;n++){
   if(nodes[n].type&&nodes[n].type.toLowerCase()=='textarea'){
      var r=new RegExp(a,'gim');
      if(nodes[n].value.match(r)){
        count++;
      }
      nodes[n].value=nodes[n].value.replace(r,b)
    }
    else if(nodes[n].nodeValue && nodes[n].nodeValue.length > 0){
      var r=new RegExp(a,'gim');
      if(nodes[n].nodeValue.match(r)){
        count++;
      }
      nodes[n].nodeValue=nodes[n].nodeValue.replace(r,b)
    }
    else{
      htmlreplace(a,b,nodes[n])
    }
  }
}
htmlreplace(prompt('find'),prompt('replace'));
alert('replaced '+count+' words.');

(Tested in Chrome) It's got a word count instead of just a 'done' message. I changed it to scan through all textNode elements. (I suppose MOST people wouldn't care about replacing all text on the page, but that's the use case that brought me here.)

来源：https://stackoverflow.com/questions/4769962/bookmarklet-help-creating-a-find-replace-bookmarklet

标签

javascript

replace

bookmarklet