Revision #5 on Wednesday September 9rd, 2:42am (GMT-6)

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/*
* MicroSwift graburl() (C) Copyright 2009 MicroSwift.com. All Rights Reserved.
* Created exclusively for use on Typity.com by Dustin Bolton
* Leave these top 3 lines if using this on your own site or editing, please.
*
* Last updated: 7/17/09. Now works in FF & Internet Explorer.
*
* EXAMPLES:
* graburl(textareaobject)
* Returns the url found touching the user's current cursor position.
* User may have to click first in the area sometimes. Not sure of a workaround
* Only tested in firefox so far!
* I hate textarea javascript... textarea is designed so poorly and inconsistent.
*
*/

function graburl(o) {
     if (o.setSelectionRange) {
          o.focus();
          caret=o.selectionStart; // Set initial caret position when clicked.

          // Find beginning of url
          i=caret;
          linestart=-1;     
          while(i>0) {
               charcode=o.value.substring(i-1,i).charCodeAt(0);
               if ((charcode==10)||(charcode==32)) { // If line feed or space, reached left border
                    linestart=i;
                    i=-1; // branch out
               }
               i=i-1;
          }
          if (linestart==-1) { linestart=0; } // Hit BOF
          
          // Find end of url
          i=caret;
          lineend=-1;
          while((i<o.value.length)&&(i>0)) {
               charcode=o.value.substring(i-1,i).charCodeAt(0);
               if ((charcode==10)||(charcode==32)) { // If line feed or space, reached left border
                    lineend=i-1;
                    i=-1; // branch out
               }
               i++;
          }
          if (lineend==-1) { lineend=o.value.length; } // Hit EOF
          
          url=o.value.substring(linestart,lineend);
     } else if (o.createTextRange) { // Internet Explorer
          r=o.createTextRange();
          r.moveToPoint(window.event.x, window.event.y);
          //r.expand("character");
          r.moveStart('character',-1);
          // Start at cursor and go left until we hit a space or weird character.
          i=0;
          leftline='';
          done=false;
          while( (i>-9999)&&(done==false) ) {
               r.moveStart('character',-1); // Step caret left one position (move START first!!!)
               r.moveEnd('character',-1); // Step caret left one position
               if ( (r.text.charCodeAt(0)==32) || (isNaN(r.text.charCodeAt(0))) ) {
                    done=true;
               } else {
                    leftline=r.text+leftline;
                    i=i-1;
               }
          }
          // Move cursor back to original point.
          i=i*-1;
          r.moveEnd('character',i); // Step caret right one position (move end FIRST!!!)
          r.moveStart('character',i); // Step caret right one position
          // Start at cursor and go right until we hit a space or weird character.
          i=0
          rightline='';
          done=false;
          while( (i<9999)&&(done==false) ) {
               r.moveEnd('character',1); // Step caret right one position (move end first)
               r.moveStart('character',1); // Step caret right one position
               if ( (r.text.charCodeAt(0)==32) || (isNaN(r.text.charCodeAt(0))) ) {
                    done=true;
               } else {
                    rightline=rightline+r.text;
                    i++;
               }
          }
          url=(leftline+rightline);
     }
     // url=suspected url. Check it for http and stuff...
     if ( (url.substring(0,7).toLowerCase()=='http://') || (url.substring(0,8).toLowerCase()=='https://') || (url.substring(0,5).toLowerCase()=='ftp://') ) {
               return url;
          } else {
               return 'error';
     }
}