richtext.js

通达OA部分源代码

// Cross-Browser Rich Text Editor
// http://www.kevinroth.com/rte/demo.htm
// Written by Kevin Roth ([e-mail] - 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 id="Buttons1_' + rte + '">');
		document.writeln('	<tr>');
		document.writeln('		<td>');
		document.writeln('			<select 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>');
		document.writeln('			<select 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>');
		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 id="Buttons2_' + rte + '" cellpadding="1" cellspacing="0">');
		document.writeln('	<tr>');
		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_bold.gif" width="25" height="24" alt="Bold" title="Bold" onClick="FormatText(\'' + rte + '\', \'bold\', \'\')"></td>');
		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_italic.gif" width="25" height="24" alt="Italic" title="Italic" onClick="FormatText(\'' + rte + '\', \'italic\', \'\')"></td>');
		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_underline.gif" width="25" height="24" alt="Underline" title="Underline" onClick="FormatText(\'' + rte + '\', \'underline\', \'\')"></td>');
		document.writeln('		<td>&nbsp;</td>');
		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_left_just.gif" width="25" height="24" alt="Align Left" title="Align Left" onClick="FormatText(\'' + rte + '\', \'justifyleft\', \'\')"></td>');
		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_centre.gif" width="25" height="24" alt="Center" title="Center" onClick="FormatText(\'' + rte + '\', \'justifycenter\', \'\')"></td>');
		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_right_just.gif" width="25" height="24" alt="Align Right" title="Align Right" onClick="FormatText(\'' + rte + '\', \'justifyright\', \'\')"></td>');
		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_justifyfull.gif" width="25" height="24" alt="Justify Full" title="Justify Full" onclick="FormatText(\'' + rte + '\', \'justifyfull\', \'\')"></td>');
		document.writeln('		<td>&nbsp;</td>');
		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_numbered_list.gif" width="25" height="24" alt="Ordered List" title="Ordered List" onClick="FormatText(\'' + rte + '\', \'insertorderedlist\', \'\')"></td>');
		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_list.gif" width="25" height="24" alt="Unordered List" title="Unordered List" onClick="FormatText(\'' + rte + '\', \'insertunorderedlist\', \'\')"></td>');
		document.writeln('		<td>&nbsp;</td>');
		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_outdent.gif" width="25" height="24" alt="Outdent" title="Outdent" onClick="FormatText(\'' + rte + '\', \'outdent\', \'\')"></td>');
		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_indent.gif" width="25" height="24" alt="Indent" title="Indent" onClick="FormatText(\'' + rte + '\', \'indent\', \'\')"></td>');
		document.writeln('		<td><div id="forecolor_' + rte + '"><img class="btnImage" src="' + imagesPath + 'post_button_textcolor.gif" width="25" height="24" alt="Text Color" title="Text Color" onClick="FormatText(\'' + rte + '\', \'forecolor\', \'\')"></div></td>');
		document.writeln('		<td><div id="hilitecolor_' + rte + '"><img class="btnImage" src="' + imagesPath + 'post_button_bgcolor.gif" width="25" height="24" alt="Background Color" title="Background Color" onClick="FormatText(\'' + rte + '\', \'hilitecolor\', \'\')"></div></td>');
		document.writeln('		<td>&nbsp;</td>');
		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_hyperlink.gif" width="25" height="24" alt="Insert Link" title="Insert Link" onClick="FormatText(\'' + rte + '\', \'createlink\')"></td>');
		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_image.gif" width="25" height="24" 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="25" height="24" 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="25" height="24" alt="Cut" title="Cut" onClick="FormatText(\'' + rte + '\', \'cut\')"></td>');
//		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_copy.gif" width="25" height="24" alt="Copy" title="Copy" onClick="FormatText(\'' + rte + '\', \'copy\')"></td>');
//		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_paste.gif" width="25" height="24" 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="25" height="24" alt="Undo" title="Undo" onClick="FormatText(\'' + rte + '\', \'undo\')"></td>');
//		document.writeln('		<td><img class="btnImage" src="' + imagesPath + 'post_button_redo.gif" width="25" height="24" alt="Redo" title="Redo" onClick="FormatText(\'' + rte + '\', \'redo\')"></td>');
		document.writeln('	</tr>');
		document.writeln('</table>');
	}
	document.writeln('<iframe id="' + rte + '" name="' + rte + '" width="' + width + 'px" height="' + height + 'px"></iframe>');
	if (!readOnly) document.writeln('<br /><input type="checkbox" id="chkSrc' + rte + '" onclick="toggleHTMLSrc(\'' + rte + '\');" />&nbsp;View Source');
	document.writeln('<iframe width="254" height="174" id="cp' + rte + '" src="' + includesPath + 'palette.htm" 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();