// Cross-Browser Rich Text Editor
// http://www.kevinroth.com/rte/demo.htm
// Written by Kevin Roth (kevin@NOSPAMkevinroth.com - remove NOSPAM)

//init variables
var isRichText = false;
var rng;
var currentRTE;
var allRTEs = "";

var isIE;
var isGecko;

var imagesPath;
var includesPath;
var cssFile;


function initRTE(imgPath, incPath, css) {
        //check to see if designMode mode is available
        if (document.getElementById && document.designMode) isRichText = true;
        
        //set browser vars
        var ua = navigator.userAgent.toLowerCase();
        isIE = ((ua.indexOf("msie") != -1) && (ua.indexOf("opera") == -1) && (ua.indexOf("webtv") == -1)); 
        isGecko = (ua.indexOf("gecko") != -1 && ua.indexOf("safari") == -1);
        
        //set paths vars
        imagesPath = imgPath;
        includesPath = incPath;
        cssFile = css;
        
        //for testing standard textarea, uncomment the following line
        //isRichText = false;
}

function writeRichText(rte, html, width, height, buttons, readOnly) {
        if (isRichText) {
                if (allRTEs.length > 0) allRTEs += ";";
                allRTEs += rte;
                writeRTE(rte, html, width, height, buttons, readOnly);
        } else {
                writeDefault(rte, html, width, height, buttons, readOnly);
        }
}

function writeDefault(rte, html, width, height, buttons, readOnly) {
        if (!readOnly) {
                document.writeln('<textarea name="' + rte + '" id="' + rte + '" style="width: ' + width + 'px; height: ' + height + 'px;">' + html + '</textarea>');
        } else {
                document.writeln('<textarea name="' + rte + '" id="' + rte + '" style="width: ' + width + 'px; height: ' + height + 'px;" readonly>' + html + '</textarea>');
        }
}

function writeRTE(rte, html, width, height, buttons, readOnly) {
        if (readOnly) buttons = false;
        if (buttons == true) {
                document.writeln('<style type="text/css">');
                document.writeln('.btnImage {cursor: pointer; cursor: hand;}');
                document.writeln('</style>');
                document.writeln('<table style="display:inline;" id="Buttons1_' + rte + '">');
                document.writeln('        <tr>');
                document.writeln('                <td  style="padding:1px;0;margin:0;">');
                document.writeln('                        <select style="width:70px;" id="formatblock_' + rte + '" onchange="Select(\'' + rte + '\', this.id);">');
                document.writeln('                                <option value="<p>">Normal</option>');
                document.writeln('                                <option value="<p>">Paragraph</option>');
                document.writeln('                                <option value="<h1>">Heading 1 <h1></option>');
                document.writeln('                                <option value="<h2>">Heading 2 <h2></option>');
                document.writeln('                                <option value="<h3>">Heading 3 <h3></option>');
                document.writeln('                                <option value="<h4>">Heading 4 <h4></option>');
                document.writeln('                                <option value="<h5>">Heading 5 <h5></option>');
                document.writeln('                                <option value="<h6>">Heading 6 <h6></option>');
                document.writeln('                                <option value="<address>">Address <ADDR></option>');
                document.writeln('                                <option value="<pre>">Formatted <pre></option>');
                document.writeln('                        </select>');
                document.writeln('                </td>');
                document.writeln('                <td  style="padding:1px;margin:0;">');
                document.writeln('                        <select style="width:115px;" id="fontname_' + rte + '" onchange="Select(\'' + rte + '\', this.id)">');
                document.writeln('                                <option value="Font" selected>Font</option>');
                document.writeln('                                <option value="Arial, Helvetica, sans-serif">Arial</option>');
                document.writeln('                                <option value="Courier New, Courier, mono">Courier New</option>');
                document.writeln('                                <option value="Times New Roman, Times, serif">Times New Roman</option>');
                document.writeln('                                <option value="Verdana, Arial, Helvetica, sans-serif">Verdana</option>');
                document.writeln('                        </select>');
                document.writeln('                </td>');
                document.writeln('                <td  style="padding:0;margin:0;">');
                document.writeln('                        <select unselectable="on" id="fontsize_' + rte + '" onchange="Select(\'' + rte + '\', this.id);">');
                document.writeln('                                <option value="Size">Size</option>');
                document.writeln('                                <option value="1">1</option>');
                document.writeln('                                <option value="2">2</option>');
                document.writeln('                                <option value="3">3</option>');
                document.writeln('                                <option value="4">4</option>');
                document.writeln('                                <option value="5">5</option>');
                document.writeln('                                <option value="6">6</option>');
                document.writeln('                                <option value="7">7</option>');
                document.writeln('                        </select>');
                document.writeln('                </td>');
                document.writeln('        </tr>');
                document.writeln('</table>');
                document.writeln('<table style="display:inline;" id="Buttons2_' + rte + '" cellpadding="0" cellspacing="0">');
                document.writeln('        <tr>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;"><img class="btnImage" src="' + imagesPath + 'post_button_bold.gif" width="22" height="22" alt="Bold" title="Bold" onclick="FormatText(\'' + rte + '\', \'bold\', \'\')"></td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;"><img class="btnImage" src="' + imagesPath + 'post_button_italic.gif" width="22" height="22" alt="Italic" title="Italic" onclick="FormatText(\'' + rte + '\', \'italic\', \'\')"></td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;"><img class="btnImage" src="' + imagesPath + 'post_button_underline.gif" width="22" height="22" alt="Underline" title="Underline" onclick="FormatText(\'' + rte + '\', \'underline\', \'\')"></td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;">&nbsp;</td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;"><img class="btnImage" src="' + imagesPath + 'post_button_left_just.gif" width="22" height="22" alt="Align Left" title="Align Left" onclick="FormatText(\'' + rte + '\', \'justifyleft\', \'\')"></td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;"><img class="btnImage" src="' + imagesPath + 'post_button_centre.gif" width="22" height="22" alt="Center" title="Center" onclick="FormatText(\'' + rte + '\', \'justifycenter\', \'\')"></td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;"><img class="btnImage" src="' + imagesPath + 'post_button_right_just.gif" width="22" height="22" alt="Align Right" title="Align Right" onclick="FormatText(\'' + rte + '\', \'justifyright\', \'\')"></td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;"><img class="btnImage" src="' + imagesPath + 'post_button_justifyfull.gif" width="22" height="22" alt="Justify Full" title="Justify Full" onclick="FormatText(\'' + rte + '\', \'justifyfull\', \'\')"></td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;">&nbsp;</td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;"><img class="btnImage" src="' + imagesPath + 'post_button_numbered_list.gif" width="22" height="22" alt="Ordered List" title="Ordered List" onclick="FormatText(\'' + rte + '\', \'insertorderedlist\', \'\')"></td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;"><img class="btnImage" src="' + imagesPath + 'post_button_list.gif" width="22" height="22" alt="Unordered List" title="Unordered List" onclick="FormatText(\'' + rte + '\', \'insertunorderedlist\', \'\')"></td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;">&nbsp;</td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;"><img class="btnImage" src="' + imagesPath + 'post_button_outdent.gif" width="22" height="22" alt="Outdent" title="Outdent" onclick="FormatText(\'' + rte + '\', \'outdent\', \'\')"></td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;"><img class="btnImage" src="' + imagesPath + 'post_button_indent.gif" width="22" height="22" alt="Indent" title="Indent" onclick="FormatText(\'' + rte + '\', \'indent\', \'\')"></td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;"><div id="forecolor_' + rte + '"><img class="btnImage" src="' + imagesPath + 'post_button_textcolor.gif" width="22" height="22" alt="Text Color" title="Text Color" onclick="FormatText(\'' + rte + '\', \'forecolor\', \'\')"></div></td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;"><div id="hilitecolor_' + rte + '"><img class="btnImage" src="' + imagesPath + 'post_button_bgcolor.gif" width="22" height="22" alt="Background Color" title="Background Color" onclick="FormatText(\'' + rte + '\', \'hilitecolor\', \'\')"></div></td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;">&nbsp;</td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;"><img class="btnImage" src="' + imagesPath + 'post_button_hyperlink.gif" width="22" height="22" alt="Insert Link" title="Insert Link" onclick="FormatText(\'' + rte + '\', \'createlink\')"></td>');
                document.writeln('                <td  style="padding:7px 0 0 0;margin:0;"><img class="btnImage" src="' + imagesPath + 'post_button_image.gif" width="22" height="22" alt="Add Image" title="Add Image" onclick="AddImage(\'' + rte + '\')"></td>');
                if (isIE) document.writeln('                <td><img class="btnImage" src="' + imagesPath + 'post_button_spellcheck.gif" width="22" height="22" alt="Spell Check" title="Spell Check" onclick="checkspell()"></td>');
//                document.writeln('                <td>&nbsp;</td>');
//                document.writeln('                <td><img class="btnImage" src="' + imagesPath + 'post_button_cut.gif" width="22" height="22" alt="Cut" title="Cut" onclick="FormatText(\'' + rte + '\', \'cut\')"></td>');
//                document.writeln('                <td><img class="btnImage" src="' + imagesPath + 'post_button_copy.gif" width="22" height="22" alt="Copy" title="Copy" onclick="FormatText(\'' + rte + '\', \'copy\')"></td>');
//                document.writeln('                <td><img class="btnImage" src="' + imagesPath + 'post_button_paste.gif" width="22" height="22" alt="Paste" title="Paste" onclick="FormatText(\'' + rte + '\', \'paste\')"></td>');
//                document.writeln('                <td>&nbsp;</td>');
//                document.writeln('                <td><img class="btnImage" src="' + imagesPath + 'post_button_undo.gif" width="22" height="22" alt="Undo" title="Undo" onclick="FormatText(\'' + rte + '\', \'undo\')"></td>');
//                document.writeln('                <td><img class="btnImage" src="' + imagesPath + 'post_button_redo.gif" width="22" height="22" alt="Redo" title="Redo" onclick="FormatText(\'' + rte + '\', \'redo\')"></td>');
                document.writeln('        </tr>');
                document.writeln('</table><br />');
        }
        document.writeln('<iframe border="0" frameborder="0" id="' + rte + '" name="' + rte + '" width="' + width + '%" height="' + height + 'px" style="border:1px solid #7F9DB9;"></iframe>');
        if (!readOnly) document.writeln('<br /><label for="chkSrc'+ rte +'">'+'<input type="checkbox" id="chkSrc' + rte + '" onclick="toggleHTMLSrc(\'' + rte + '\');" />&nbsp;View Source</label>');
        document.writeln('<iframe width="235" height="170" id="cp' + rte + '" src="' + includesPath + 'palette.html" marginwidth="0" marginheight="0" scrolling="no" style="visibility:hidden; display: none; position: absolute;"></iframe>');
        document.writeln('<input type="hidden" id="hdn' + rte + '" name="' + rte + '" value="">');
        document.getElementById('hdn' + rte).value = html;
        enableDesignMode(rte, html, readOnly);
}

function enableDesignMode(rte, html, readOnly) {
        var frameHtml = "<html id=\"" + rte + "\">\n";
        frameHtml += "<head>\n";
        //to reference your stylesheet, set href property below to your stylesheet path and uncomment
        if (cssFile.length > 0) {
                frameHtml += "<link media=\"all\" type=\"text/css\" href=\"" + cssFile + "\" rel=\"stylesheet\">\n";
        }
        frameHtml += "<style>\n";
        frameHtml += "body {\n";
        frameHtml += "        background: #FFFFFF;\n";
        frameHtml += "        margin: 0px;\n";
        frameHtml += "        padding: 0px;\n";
        frameHtml += "}\n";
        frameHtml += "</style>\n";
        frameHtml += "</head>\n";
        frameHtml += "<body>\n";
        frameHtml += html + "\n";
        frameHtml += "</body>\n";
        frameHtml += "</html>";
        
        if (document.all) {
                var oRTE = frames[rte].document;
                oRTE.open();
                oRTE.write(frameHtml);
                oRTE.close();
                if (!readOnly) oRTE.designMode = "On";
        } else {
                try {
                        if (!readOnly) document.getElementById(rte).contentDocument.designMode = "on";
                        try {
                                var oRTE = document.getElementById(rte).contentWindow.document;
                                oRTE.open();
                                oRTE.write(frameHtml);
                                oRTE.close();
                                //oRTE.addEventListener("blur", updateRTE(rte), true);
                                if (isGecko && !readOnly) {
                                        //attach a keyboard handler for gecko browsers to make keyboard shortcuts work
                                        oRTE.addEventListener("keypress", kb_handler, true);
                                }
                        } catch (e) {
                                alert("Error preloading content.");
                        }
                } catch (e) {
                        //gecko may take some time to enable design mode.
                        //Keep looping until able to set.
                        if (isGecko) {
                                setTimeout("enableDesignMode('" + rte + "', '" + html + "');", 10);
                        } else {
                                return false;
                        }
                }
        }
}

function updateRTEs() {
        var vRTEs = allRTEs.split(";");
        for (var i = 0; i < vRTEs.length; i++) {
                updateRTE(vRTEs[i]);
        }
}

function updateRTE(rte) {
        //set message value
        var oHdnMessage = document.getElementById('hdn' + rte);
        var oRTE = document.getElementById(rte);
        var readOnly = false;
        
        //check for readOnly mode
        if (document.all) {
                if (frames[rte].document.designMode != "On") readOnly = true;
        } else {
                if (document.getElementById(rte).contentDocument.designMode != "on") readOnly = true;
        }
        
        if (isRichText && !readOnly) {
                //if viewing source, switch back to design view
                if (document.getElementById("chkSrc" + rte).checked) {
                        document.getElementById("chkSrc" + rte).checked = false;
                        toggleHTMLSrc(rte);
                }
                
                if (oHdnMessage.value == null) oHdnMessage.value = "";
                if (document.all) {
                        oHdnMessage.value = frames[rte].document.body.innerHTML;
                } else {
                        oHdnMessage.value = oRTE.contentWindow.document.body.innerHTML;
                }
                //if there is no content (other than formatting) set value to nothing
                if (stripHTML(oHdnMessage.value.replace("&nbsp;", " ")) == "") oHdnMessage.value = "";
        }
}

function toggleHTMLSrc(rte) {
        //contributed by Bob Hutzel (thanks Bob!)
        var oRTE;
        if (document.all) {
                oRTE = frames[rte].document;
        } else {
                oRTE = document.getElementById(rte).contentWindow.document;
        }
        
        if (document.getElementById("chkSrc" + rte).checked) {
                document.getElementById("Buttons1_" + rte).style.visibility = "hidden";
                document.getElementById("Buttons2_" + rte).style.visibility = "hidden";
                if (document.all) {
                        oRTE.body.innerText = oRTE.body.innerHTML;
                } else {
                        var htmlSrc = oRTE.createTextNode(oRTE.body.innerHTML);
                        oRTE.body.innerHTML = "";
                        oRTE.body.appendChild(htmlSrc);
                }
        } else {
                document.getElementById("Buttons1_" + rte).style.visibility = "visible";
                document.getElementById("Buttons2_" + rte).style.visibility = "visible";
                if (document.all) {
                        oRTE.body.innerHTML = oRTE.body.innerText;
                } else {
                        var htmlSrc = oRTE.body.ownerDocument.createRange();
                        htmlSrc.selectNodeContents(oRTE.body);
                        oRTE.body.innerHTML = htmlSrc.toString();
                }
        }
}

//Function to format text in the text box
function FormatText(rte, command, option) {
        var oRTE;
        if (document.all) {
                oRTE = frames[rte];
                
                //get current selected range
                var selection = oRTE.document.selection; 
                if (selection != null) {
                        rng = selection.createRange();
                }
        } else {
                oRTE = document.getElementById(rte).contentWindow;
                
                //get currently selected range
                var selection = oRTE.getSelection();
                rng = selection.getRangeAt(selection.rangeCount - 1).cloneRange();
        }
        
        try {
                if ((command == "forecolor") || (command == "hilitecolor")) {
                        //save current values
                        parent.command = command;
                        currentRTE = rte;
                        
                        //position and show color palette
                        buttonElement = document.getElementById(command + '_' + rte);
                        document.getElementById('cp' + rte).style.left = getOffsetLeft(buttonElement) + "px";
                        document.getElementById('cp' + rte).style.top = (getOffsetTop(buttonElement) + buttonElement.offsetHeight) + "px";
                        if (document.getElementById('cp' + rte).style.visibility == "hidden") {
                                document.getElementById('cp' + rte).style.visibility = "visible";
                                document.getElementById('cp' + rte).style.display = "inline";
                        } else {
                                document.getElementById('cp' + rte).style.visibility = "hidden";
                                document.getElementById('cp' + rte).style.display = "none";
                        }
                } else if (command == "createlink") {
                        var szURL = prompt("Enter a URL:", "");
                        try {
                                //ignore error for blank urls
                                oRTE.document.execCommand("Unlink", false, null);
                                oRTE.document.execCommand("CreateLink", false, szURL);
                        } catch (e) {
                                //do nothing
                        }
                } else {
                        //oRTE.focus();
                          oRTE.document.execCommand(command, false, option);
                        //oRTE.focus();
                }
        } catch (e) {
                alert(e);
        }
}

//Function to set color
function setColor(color) {
        var rte = currentRTE;
        var oRTE;
        if (document.all) {
                oRTE = frames[rte];
        } else {
                oRTE = document.getElementById(rte).contentWindow;
        }
        
        var parentCommand = parent.command;
        if (document.all) {
                //retrieve selected range
                var sel = oRTE.document.selection; 
                if (parentCommand == "hilitecolor") parentCommand = "backcolor";
                if (sel != null) {
                        var newRng = sel.createRange();
                        newRng = rng;
                        newRng.select();
                }
        } else {
                //oRTE.focus();
        }
        oRTE.document.execCommand(parentCommand, false, color);
        //oRTE.focus();
        document.getElementById('cp' + rte).style.visibility = "hidden";
        document.getElementById('cp' + rte).style.display = "none";
}

//Function to add image
function AddImage(rte) {
        var oRTE;
        if (document.all) {
                oRTE = frames[rte];
                
                //get current selected range
                var selection = oRTE.document.selection; 
                if (selection != null) {
                        rng = selection.createRange();
                }
        } else {
                oRTE = document.getElementById(rte).contentWindow;
                
                //get currently selected range
                var selection = oRTE.getSelection();
                rng = selection.getRangeAt(selection.rangeCount - 1).cloneRange();
        }
        
        imagePath = prompt('Enter Image URL:', 'http://');                                
        if ((imagePath != null) && (imagePath != "")) {
                //oRTE.focus();
                oRTE.document.execCommand('InsertImage', false, imagePath);
        }
        //oRTE.focus();
}

//function to perform spell check
function checkspell() {
        try {
                var tmpis = new ActiveXObject("ieSpell.ieSpellExtension");
                tmpis.CheckAllLinkedDocuments(document);
        }
        catch(exception) {
                if(exception.number==-2146827859) {
                        if (confirm("ieSpell not detected.  Click Ok to go to download page."))
                                window.open("http://www.iespell.com/download.php","DownLoad");
                } else {
                        alert("Error Loading ieSpell: Exception " + exception.number);
                }
        }
}

function getOffsetTop(elm) {
        var mOffsetTop = elm.offsetTop;
        var mOffsetParent = elm.offsetParent;
        
        while(mOffsetParent){
                mOffsetTop += mOffsetParent.offsetTop;
                mOffsetParent = mOffsetParent.offsetParent;
        }
        
        return mOffsetTop;
}

function getOffsetLeft(elm) {
        var mOffsetLeft = elm.offsetLeft;
        var mOffsetParent = elm.offsetParent;
        
        while(mOffsetParent) {
                mOffsetLeft += mOffsetParent.offsetLeft;
                mOffsetParent = mOffsetParent.offsetParent;
        }
        
        return mOffsetLeft;
}

function Select(rte, selectname) {
        var oRTE;
        if (document.all) {
                oRTE = frames[rte];
                
                //get current selected range
                var selection = oRTE.document.selection; 
                if (selection != null) {
                        rng = selection.createRange();
                }
        } else {
                oRTE = document.getElementById(rte).contentWindow;
                
                //get currently selected range
                var selection = oRTE.getSelection();
                rng = selection.getRangeAt(selection.rangeCount - 1).cloneRange();
        }
        
        var idx = document.getElementById(selectname).selectedIndex;
        // First one is always a label
        if (idx != 0) {
                var selected = document.getElementById(selectname).options[idx].value;
                var cmd = selectname.replace('_' + rte, '');
                oRTE.document.execCommand(cmd, false, selected);
                document.getElementById(selectname).selectedIndex = 0;
        }
        //oRTE.focus();
}

function kb_handler(evt) {
        var rte = evt.target.id;
        
        //contributed by Anti Veeranna (thanks Anti!)
        if (evt.ctrlKey) {
                var key = String.fromCharCode(evt.charCode).toLowerCase();
                var cmd = '';
                switch (key) {
                        case 'b': cmd = "bold"; break;
                        case 'i': cmd = "italic"; break;
                        case 'u': cmd = "underline"; break;
                };

                if (cmd) {
                        FormatText(rte, cmd, true);
                        //evt.target.ownerDocument.execCommand(cmd, false, true);
                        // stop the event bubble
                        evt.preventDefault();
                        evt.stopPropagation();
                }
         }
}

function docChanged (evt) {
        alert('changed');
}

function stripHTML(oldString) {
        var newString = oldString.replace(/(<([^>]+)>)/ig,"");
        
        //replace carriage returns and line feeds
        newString = escape(newString);
        newString = newString.replace("%0D%0A"," ");
        newString = newString.replace("%0A"," ");
        newString = newString.replace("%0D"," ");
        newString = unescape(newString);
        
        //trim string
        newString = trim(newString);
        
        return newString;
}

function trim(inputString) {
   // Removes leading and trailing spaces from the passed string. Also removes
   // consecutive spaces and replaces it with one space. If something besides
   // a string is passed in (null, custom object, etc.) then return the input.
   if (typeof inputString != "string") return inputString;
   var retValue = inputString;
   var ch = retValue.substring(0, 1);
        
   while (ch == " ") { // Check for spaces at the beginning of the string
      retValue = retValue.substring(1, retValue.length);
      ch = retValue.substring(0, 1);
   }
   ch = retValue.substring(retValue.length-1, retValue.length);
        
   while (ch == " ") { // Check for spaces at the end of the string
      retValue = retValue.substring(0, retValue.length-1);
      ch = retValue.substring(retValue.length-1, retValue.length);
   }
        
        // Note that there are two spaces in the string - look for multiple spaces within the string
   while (retValue.indexOf("  ") != -1) {
                // Again, there are two spaces in each of the strings
      retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length);
   }
   return retValue; // Return the trimmed string back to the user
}