editor.js

支持邮寄/回复/编辑信息

/**
* bbCode control by subBlue design [ www.subBlue.com ]
* Includes unixsafe colour palette selector by SHS`
*/

// Startup variables
var imageTag = false;
var theSelection = false;

// Check for Browser & Platform for PC & IE specific bits
// More details from: http://www.mozilla.org/docs/web-developer/sniffer/browser_type.html
var clientPC = navigator.userAgent.toLowerCase(); // Get client info
var clientVer = parseInt(navigator.appVersion); // Get browser version

var is_ie = ((clientPC.indexOf('msie') != -1) && (clientPC.indexOf('opera') == -1));
var is_win = ((clientPC.indexOf('win') != -1) || (clientPC.indexOf('16bit') != -1));

var baseHeight;
window.onload = initInsertions;

/**
* Shows the help messages in the helpline window
*/
function helpline(help)
{
	document.forms[form_name].helpbox.value = help_line[help];
}

/**
* Fix a bug involving the TextRange object. From
* http://www.frostjedi.com/terra/scripts/demo/caretBug.html
*/ 
function initInsertions() 
{
	var textarea = document.forms[form_name].elements[text_name];
	textarea.focus();
	if (is_ie && typeof(baseHeight) != 'number')
	{
		baseHeight = document.selection.createRange().duplicate().boundingHeight;
	}
}

/**
* bbstyle
*/
function bbstyle(bbnumber)
{	
	if (bbnumber != -1)
	{
		bbfontstyle(bbtags[bbnumber], bbtags[bbnumber+1]);
	} else {
		insert_text('[*]');
		document.forms[form_name].elements[text_name].focus();		
	}
}

/**
* Apply bbcodes
*/
function bbfontstyle(bbopen, bbclose)
{
	theSelection = false;
		
	var textarea = document.forms[form_name].elements[text_name];
	textarea.focus();

	if ((clientVer >= 4) && is_ie && is_win)
	{
		// Get text selection
		theSelection = document.selection.createRange().text;

		if (theSelection)
		{
			// Add tags around selection
			document.selection.createRange().text = bbopen + theSelection + bbclose;
			document.forms[form_name].elements[text_name].focus();
			theSelection = '';
			return;
		}
	}
	else if (document.forms[form_name].elements[text_name].selectionEnd && (document.forms[form_name].elements[text_name].selectionEnd - document.forms[form_name].elements[text_name].selectionStart > 0))
	{
		mozWrap(document.forms[form_name].elements[text_name], bbopen, bbclose);
		document.forms[form_name].elements[text_name].focus();
		theSelection = '';
		return;
	}

	//The new position for the cursor after adding the bbcode
	var new_pos = getCaretPosition(textarea).start + bbopen.length;

	// Open tag
	insert_text(bbopen + bbclose);

	// Center the cursor when we don't have a selection
	// Gecko and proper browsers
	if (!isNaN(textarea.selectionStart))
	{
		textarea.selectionStart = new_pos;
		textarea.selectionEnd = new_pos;
	}	
	// IE
	else if (document.selection)
	{
		var range = textarea.createTextRange(); 
        range.move("character", new_pos); 
		range.select();
		storeCaret(document.forms[form_name].elements[text_name]);		
	}

	document.forms[form_name].elements[text_name].focus();
	return;
}

/**
* Insert text at position
*/
function insert_text(text, spaces, popup)
{
	var textarea;
	
	if (!popup) 
	{
		textarea = document.forms[form_name].elements[text_name];
	} else 
	{
		textarea = opener.document.forms[form_name].elements[text_name];
	}
	if (spaces) 
	{
		text = ' ' + text + ' ';
	}
	
	if (!isNaN(textarea.selectionStart))
	{
		var sel_start = textarea.selectionStart;
		var sel_end = textarea.selectionEnd;

		mozWrap(textarea, text, '')
		textarea.selectionStart = sel_start + text.length;
		textarea.selectionEnd = sel_end + text.length;
	}	
	
	else if (textarea.createTextRange && textarea.caretPos)
	{
		if (baseHeight != textarea.caretPos.boundingHeight) 
		{
			textarea.focus();
			storeCaret(textarea);
		}		
		var caret_pos = textarea.caretPos;
		caret_pos.text = caret_pos.text.charAt(caret_pos.text.length - 1) == ' ' ? caret_pos.text + text + ' ' : caret_pos.text + text;
		
	}

	else
	{
		textarea.value = textarea.value + text;
	}
	document.forms[form_name].elements[text_name].focus();
}

/**
* Add inline attachment at position
*/
function attach_inline(index, filename)
{
	insert_text('[attachment=' + index + ']' + filename + '[/attachment]');
	document.forms[form_name].elements[text_name].focus();
}

/**
* Add quote text to message
*/
function addquote(post_id, username)
{
	var message_name = 'message_' + post_id;
	var theSelection = '';
	var divarea = false;

	if (document.all)
	{
		divarea = document.all[message_name];
	}
	else
	{
		divarea = document.getElementById(message_name);
	}

	// Get text selection - not only the post content :(
	if (window.getSelection)
	{
		theSelection = window.getSelection().toString();
	}
	else if (document.getSelection)
	{
		theSelection = document.getSelection();
	}
	else if (document.selection)
	{
		theSelection = document.selection.createRange().text;
	}

	if (theSelection == '' || typeof theSelection == 'undefined' || theSelection == null)
	{
		if (divarea.innerHTML)
		{
			theSelection = divarea.innerHTML.replace(/<br>/ig, '\n');
			theSelection = theSelection.replace(/<br\/>/ig, '\n');
			theSelection = theSelection.replace(/&lt\;/ig, '<');
			theSelection = theSelection.replace(/&gt\;/ig, '>');
			theSelection = theSelection.replace(/&amp\;/ig, '&');			
		}
		else if (document.all)
		{
			theSelection = divarea.innerText;
		}
		else if (divarea.textContent)
		{
			theSelection = divarea.textContent;
		}
		else if (divarea.firstChild.nodeValue)
		{
			theSelection = divarea.firstChild.nodeValue;
		}
	}

	if (theSelection)
	{
		insert_text('[quote="' + username + '"]' + theSelection + '[/quote]');
	}

	return;
}

/**
* From http://www.massless.org/mozedit/
*/
function mozWrap(txtarea, open, close)
{
	var selLength = txtarea.textLength;
	var selStart = txtarea.selectionStart;
	var selEnd = txtarea.selectionEnd;
	var scrollTop = txtarea.scrollTop;

	if (selEnd == 1 || selEnd == 2) 
	{
		selEnd = selLength;
	}

	var s1 = (txtarea.value).substring(0,selStart);
	var s2 = (txtarea.value).substring(selStart, selEnd)
	var s3 = (txtarea.value).substring(selEnd, selLength);

	txtarea.value = s1 + open + s2 + close + s3;
	txtarea.selectionStart = selEnd + open.length + close.length;
	txtarea.selectionEnd = txtarea.selectionStart;
	txtarea.focus();
	txtarea.scrollTop = scrollTop;

	return;
}

/**
* Insert at Caret position. Code from
* http://www.faqts.com/knowledge_base/view.phtml/aid/1052/fid/130
*/
function storeCaret(textEl)
{
	if (textEl.createTextRange)
	{
		textEl.caretPos = document.selection.createRange().duplicate();
	}
}

/**
* Color pallette
*/
function colorPalette(dir, width, height)
{
	var r = 0, g = 0, b = 0;
	var numberList = new Array(6);

	numberList[0] = '00';
	numberList[1] = '40';
	numberList[2] = '80';
	numberList[3] = 'BF';
	numberList[4] = 'FF';

	document.writeln('<table cellspacing="1" cellpadding="0" border="0">');

	for (r = 0; r < 5; r++)
	{
		if (dir == 'h')
		{
			document.writeln('<tr>');
		}

		for (g = 0; g < 5; g++)
		{
			if (dir == 'v')
			{
				document.writeln('<tr>');
			}
			
			for (b = 0; b < 5; b++)
			{
				color = String(numberList[r]) + String(numberList[g]) + String(numberList[b]);
				document.write('<td bgcolor="#' + color + '">');
				document.write('<a href="#" onclick="bbfontstyle(\'[color=#' + color + ']\', \'[/color]\'); return false;" onmouseover="helpline(\'s\');"  onmouseout="helpline(\'tip\');"><img src="images/spacer.gif" width="' + width + '" height="' + height + '" alt="#' + color + '" title="#' + color + '" /></a>');
				document.writeln('</td>');
			}

			if (dir == 'v')
			{
				document.writeln('</tr>');
			}
		}

		if (dir == 'h')
		{
			document.writeln('</tr>');
		}
	}
	document.writeln('</table>');
}


/**
* Caret Position object
*/
function caretPosition()
{
	var start = null;
	var end = null;
}


/**
* Get the caret position in an textarea
*/
function getCaretPosition(txtarea)
{
	var caretPos = new caretPosition();
	
	// simple Gecko/Opera way
	if(txtarea.selectionStart || txtarea.selectionStart == 0)
	{
		caretPos.start = txtarea.selectionStart;
		caretPos.end = txtarea.selectionEnd;
	}
	// dirty and slow IE way
	else if(document.selection)
	{
		// get current selection
		var range = document.selection.createRange();

		// a new selection of the whole textarea
		var range_all = document.body.createTextRange();
		range_all.moveToElementText(txtarea);
		
		// calculate selection start point by moving beginning of range_all to beginning of range
		var sel_start;
		for (sel_start = 0; range_all.compareEndPoints('StartToStart', range) < 0; sel_start++)
		{		
			range_all.moveStart('character', 1);
		}
		
		txtarea.sel_start = sel_start;
				
		// we ignore the end value for IE, this is already dirty enough and we don't need it
		caretPos.start = txtarea.sel_start;
		caretPos.end = txtarea.sel_start;		
	}

	return caretPos;
}