How to get Text Selection in WordPress Editor

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I want something like if I select any word in WordPress Visual Editor, it will get replaced with my own text.

Actually Visual Editor is an iFrame. We can do this thing in textarea, but how can we implement this in iFrame (WordPress Visual Editor)?

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Any help would be appreciated.

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  1. The visual editor is an TinyMCE implementation. The first way to repace a selected text, is to write a plugin for the TinyMCE.

    If you do not want to write a plugin, use the tinyMCE object:

    add_action( 'admin_footer', 'tinyNagging' );

function tinyNagging() {

echo '
<script type="text/javascript">
jQuery(document).ready(
function() {
  window.setInterval(
    function(){
      var selectedText = tinyMCE.activeEditor.selection.getContent( {format : "text"} );
      if ( selectedText != "" )
        tinyMCE.activeEditor.selection.setContent( "FooBar" );
    },
    1000
  );
}
);
</script>
';

}

    This script checks every second if a text is selected and replace it with ‘FooBar’.

    Get the selected text with tinyMCE.activeEditor.selection.getContent( {format : 'text'} ); for plain text or {format : 'html'} for the html markup.

    Set the new content with tinyMCE.activeEditor.selection.setContent( [YourNewContent] );

    See the TinyMCE manpages