Index: plugins/linebreaks.css
===================================================================
RCS file: plugins/linebreaks/linebreaks.css
diff -N plugins/linebreaks/linebreaks.css
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ plugins/linebreaks/linebreaks.css	26 Feb 2010 00:00:30 -0000
@@ -0,0 +1,11 @@
+/* $Id: break.css,v 1.2 2008/06/11 04:29:01 sun Exp $ */
+
+.wysiwyg-break {
+  display: block;
+  border: 0;
+  border-top: 1px dotted #ccc;
+  margin-top: 1em;
+  width: 100%;
+  height: 12px;
+  background: transparent url(images/breaktext.gif) no-repeat center top;
+}
Index: plugins/linebreaks.inc
===================================================================
RCS file: plugins/linebreaks.inc
diff -N plugins/linebreaks.inc
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ plugins/linebreaks.inc	26 Feb 2010 00:00:30 -0000
@@ -0,0 +1,22 @@
+<?php
+// $Id:
+
+/**
+ * @file
+ * Converts p and br tags to linebreaks.
+ */
+
+/**
+ * Implementation of hook_wysiwyg_plugin().
+ */
+function wysiwyg_linebreaks_plugin() {
+  $plugins['linebreaks'] = array(
+    'title' => t('Force linebreaks'),
+    'vendor url' => 'http://drupal.org/project/wysiwyg',
+//    'icon file' => 'break.gif',
+    'icon title' => t('Converts all p and br tags to linebreaks'),
+    'settings' => array(),
+  );
+  return $plugins;
+}
+
Index: plugins/linebreaks/linebreaks.js
===================================================================
RCS file: plugins/linebreaks/linebreaks.js
diff -N plugins/linebreaks/linebreaks.js
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ plugins/linebreaks/linebreaks.js	26 Feb 2010 00:00:30 -0000
@@ -0,0 +1,149 @@
+// $Id$
+
+// Adopted from Wordpress 2.8.1-beta editor.js.
+
+Drupal.wysiwyg.plugins.linebreaks = {
+    
+//  isNode: function(node) {
+//    console.log("Got here");
+//    return ($(node).is('wysiwyg-linebreaks'));
+//  },
+  invoke: function(data, settings, instanceId) {
+    alert('This button does nothing, it belongs to the linebreaks plugin.');
+  },
+  attach: function(content, settings, instanceId) {
+    content = this.lbautop(content);
+    return content;
+  },
+  
+  detach: function(content, settings, instanceId) {
+    content = this.pre_lbautop(content);
+    return content;
+  },
+
+  // This function runs when the content is saved (or when WYSIWYG is disabled manually)
+  pre_lbautop : function(content) {
+      var blocklist1, blocklist2;
+
+      // Protect pre|script tags
+      content = content.replace(/<(pre|script)[^>]*>[\s\S]+?<\/\1>/g, function(a) {
+          a = a.replace(/<br ?\/?>[\r\n]*/g, '<lb_temp>');
+          return a.replace(/<\/?p( [^>]*)?>[\r\n]*/g, '<lb_temp>');
+      });
+
+      // Pretty it up for the source editor
+      blocklist1 = 'blockquote|ul|ol|li|hr|table|thead|tbody|tr|th|td|div|h[1-6]|p';
+      content = content.replace(new RegExp('\\s*</('+blocklist1+')>\\s*', 'mg'), '</$1>\n');
+      content = content.replace(new RegExp('\\s*<(('+blocklist1+')[^>]*)>', 'mg'), '\n<$1>');
+
+      // Mark </p> if it has any attributes.
+      content = content.replace(new RegExp('(<p [^>]+>.*?)</p>', 'mg'), '$1</p#>');
+
+      // Sepatate <div> containing <p>
+      content = content.replace(new RegExp('<div([^>]*)>\\s*<p>', 'mgi'), '<div$1>\n\n');
+
+      // Remove <p> and <br />
+      content = content.replace(new RegExp('\\s*<p>', 'mgi'), '');
+      content = content.replace(new RegExp('\\s*</p>\\s*', 'mgi'), '\n\n');
+      content = content.replace(new RegExp('\\n\\s*\\n', 'mgi'), '\n\n');
+      content = content.replace(new RegExp('\\s*<br ?/?>\\s*', 'gi'), '\n');
+
+      // Fix some block element newline issues
+      content = content.replace(new RegExp('\\s*<div', 'mg'), '\n<div');
+      content = content.replace(new RegExp('</div>\\s*', 'mg'), '</div>\n');
+      content = content.replace(new RegExp('\\s*\\[caption([^\\[]+)\\[/caption\\]\\s*', 'gi'), '\n\n[caption$1[/caption]\n\n');
+      content = content.replace(new RegExp('caption\\]\\n\\n+\\[caption', 'g'), 'caption]\n\n[caption');
+
+      // Block elements which look nicer with two newlines before and after
+      blocklist2 = 'blockquote|ul|ol|table|h[1-6]|pre';
+      content = content.replace(new RegExp('\\s*<(('+blocklist2+') ?[^>]*)\\s*>', 'mg'), '\n\n<$1>');
+      content = content.replace(new RegExp('\\s*</('+blocklist2+')>\\s*', 'mg'), '</$1>\n\n');
+      content = content.replace(new RegExp('\\s*<(hr ?[^>]*)\\s*>', 'mg'), '\n\n<$1>\n\n');
+
+      // Block elements which look nicer with one newline before and after
+      blocklist3 = 'li|thead|tr|th|td';
+      content = content.replace(new RegExp('\\s*<(('+blocklist3+') ?[^>]*)\\s*>', 'mg'), '\n<$1>');
+      content = content.replace(new RegExp('\\s*</('+blocklist3+')>\\s*', 'mg'), '</$1>\n');
+      content = content.replace(new RegExp('<li([^>]*)>', 'g'), '\t<li$1>');
+
+      if ( content.indexOf('<object') != -1 ) {
+          content = content.replace(/<object[\s\S]+?<\/object>/g, function(a){
+              return a.replace(/[\r\n]+/g, '');
+          });
+      }
+
+      if ( content.indexOf('<embed') != -1 ) {
+          content = content.replace(/<embed[\s\S]+?<\/embed>/g, function(a){
+              return a.replace(/[\r\n]+/g, '');
+          });
+      }
+
+      // Unmark special paragraph closing tags
+      content = content.replace(new RegExp('</p#>', 'g'), '</p>\n');
+      content = content.replace(new RegExp('\\s*(<p [^>]+>.*</p>)', 'mg'), '\n$1');
+
+      // Trim whitespace
+      content = content.replace(new RegExp('^\\s*', ''), '');
+      content = content.replace(new RegExp('[\\s\\u00a0]*$', ''), '');
+
+      // put back the line breaks in pre|script
+      content = content.replace(/<lb_temp>/g, '\n');
+      // Hope.
+      return content;
+    },
+
+    // This function runs when the content is turned over to WYSIWYG
+    lbautop : function(lbvar) {
+
+      var blocklist = 'table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|hr|pre|select|form|blockquote|address|math|p|h[1-6]';
+
+      // @TODO - Fix <hr /> elements. Right now an extra space is added to the following
+      // block-level element...
+
+      if(lbvar == "") return lbvar;
+      
+      if ( lbvar.indexOf('<object') != -1 ) {
+          lbvar = lbvar.replace(/<object[\s\S]+?<\/object>/g, function(a){
+              return a.replace(/[\r\n]+/g, '');
+          });
+      }
+
+      if ( lbvar.indexOf('<embed') != -1 ) {
+          lbvar = lbvar.replace(/<embed[\s\S]+?<\/embed>/g, function(a){
+              return a.replace(/[\r\n]+/g, '');
+          });
+      }
+
+      lbvar = lbvar.replace(/<[^<>]+>/g, function(a){
+          return a.replace(/[\r\n]+/g, ' ');
+      });
+
+      lbvar = lbvar + "\n\n";
+      lbvar = lbvar.replace(new RegExp('<br />\\s*<br />', 'gi'), "\n\n");
+      lbvar = lbvar.replace(new RegExp('(<(?:'+blocklist+')[^>]*>)', 'gi'), "\n$1");
+      lbvar = lbvar.replace(new RegExp('(</(?:'+blocklist+')>)', 'gi'), "$1\n\n");
+      lbvar = lbvar.replace(new RegExp("\\r\\n|\\r", 'g'), "\n");
+      lbvar = lbvar.replace(new RegExp("\\n\\s*\\n+", 'g'), "\n\n");
+      lbvar = lbvar.replace(new RegExp('([\\s\\S]+?)\\n\\n', 'mg'), "<p>$1</p>\n");
+      lbvar = lbvar.replace(new RegExp('<p>\\s*?</p>', 'gi'), '');
+      lbvar = lbvar.replace(new RegExp('<p>\\s*(</?(?:'+blocklist+')[^>]*>)\\s*</p>', 'gi'), "$1");
+      lbvar = lbvar.replace(new RegExp("<p>(<li.+?)</p>", 'gi'), "$1");
+      lbvar = lbvar.replace(new RegExp('<p>\\s*<blockquote([^>]*)>', 'gi'), "<blockquote$1><p>");
+      lbvar = lbvar.replace(new RegExp('</blockquote>\\s*</p>', 'gi'), '</p></blockquote>');
+      lbvar = lbvar.replace(new RegExp('<p>\\s*(</?(?:'+blocklist+')[^>]*>)', 'gi'), "$1");
+      lbvar = lbvar.replace(new RegExp('(</?(?:'+blocklist+')[^>]*>)\\s*</p>', 'gi'), "$1");
+      lbvar = lbvar.replace(new RegExp('\\s*\\n', 'gi'), "<br />\n");
+      lbvar = lbvar.replace(new RegExp('(</?(?:'+blocklist+')[^>]*>)\\s*<br />', 'gi'), "$1");
+      lbvar = lbvar.replace(new RegExp('<br />(\\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)>)', 'gi'), '$1');
+      lbvar = lbvar.replace(new RegExp('(?:<p>|<br ?/?>)*\\s*\\[caption([^\\[]+)\\[/caption\\]\\s*(?:</p>|<br ?/?>)*', 'gi'), '[caption$1[/caption]');
+
+      
+      // Fix the pre|script tags
+      lbvar = lbvar.replace(/<(pre|script)[^>]*>[\s\S]+?<\/\1>/g, function(a) {
+          a = a.replace(/<br ?\/?>[\r\n]*/g, '\n');
+          return a.replace(/<\/?p( [^>]*)?>[\r\n]*/g, '\n');
+      });
+
+      return lbvar;
+    }
+};
Index: plugins/linebreaks/images/linebreaks.png
===================================================================
RCS file: plugins/linebreaks/images/linebreaks.png
diff -N plugins/linebreaks/images/linebreaks.png
Binary files /dev/null and linebreaks.png differ