UBB例子

来源：互联网发布：矢量图绘图软件编辑：程序博客网时间：2024/04/30 04:24

// 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_nav = ((clientPC.indexOf('mozilla')!=-1) && (clientPC.indexOf('spoofer')==-1)
&& (clientPC.indexOf('compatible') == -1) && (clientPC.indexOf('opera')==-1)
&& (clientPC.indexOf('webtv')==-1) && (clientPC.indexOf('hotjava')==-1));
var is_moz = 0;

var is_win = ((clientPC.indexOf("win")!=-1) || (clientPC.indexOf("16bit") != -1));
var is_mac = (clientPC.indexOf("mac")!=-1);

// Helpline messages
b_help = "粗体: [b]文字[/b] (alt+b)";
i_help = "斜体: [i]文字[/i] (alt+i)";
u_help = "下划线: [u]文字[/u] (alt+u)";
q_help = "引用文字: [quote]文字[/quote] (alt+q)";
c_help = "程序代码: [code]代码[/code] (alt+c)";
l_help = "列表: [list]文字[/list] (alt+l)";
o_help = "顺序列表: [list=]文字[/list] (alt+o)";
p_help = "插入图像: [img]http://image_url[/img] (alt+p)";
w_help = "插入URL: [url]http://url[/url] 或 [url=http://url]URL文字[/url] (alt+w)";
a_help = "关闭所有开启的 BBCode 标签";
s_help = "字体颜色: [color=red]文字[/color] 提示：您可以使用 color=#FF0000";
f_help = "字体大小: [size=x-small]小字体文字[/size]";
r_help = "插入Flash: [swf width=# height=#]http://swf_url[/swf]";

// Define the bbCode tags
bbcode = new Array();
bbtags = new Array('[b]','[/b]','[i]','[/i]','[u]','[/u]','[quote]','[/quote]','[code]','[/code]','[list]','[/list]','[list=]','[/list]','[img]','[/img]','[url]','[/url]','[swf width= height=]','[/swf]');
imageTag = false;

// Shows the help messages in the helpline window
function helpline(help) {
document.post.helpbox.value = eval(help + "_help");
}

// Replacement for arrayname.length property
function getarraysize(thearray) {
for (i = 0; i < thearray.length; i++) {
  if ((thearray[i] == "undefined") || (thearray[i] == "") || (thearray[i] == null))
   return i;
  }
return thearray.length;
}

// Replacement for arrayname.push(value) not implemented in IE until version 5.5
// Appends element to the array
function arraypush(thearray,value) {
thearray[ getarraysize(thearray) ] = value;
}

// Replacement for arrayname.pop() not implemented in IE until version 5.5
// Removes and returns the last element of an array
function arraypop(thearray) {
thearraysize = getarraysize(thearray);
retval = thearray[thearraysize - 1];
delete thearray[thearraysize - 1];
return retval;
}

function checkForm() {

formErrors = false;

if (document.post.message.value.length < 2) {
formErrors = "您发表的文章必须有内容。";
}

if (formErrors) {
  alert(formErrors);
  return false;
} else {
  bbstyle(-1);
  //formObj.preview.disabled = true;
  //formObj.submit.disabled = true;
  return true;
}
}

function bbfontstyle(bbopen, bbclose) {
var txtarea = document.post.message;

if ((clientVer >= 4) && is_ie && is_win) {
  theSelection = document.selection.createRange().text;
  if (!theSelection) {
   txtarea.value += bbopen + bbclose;
   txtarea.focus();
   return;
  }
  document.selection.createRange().text = bbopen + theSelection + bbclose;
  txtarea.focus();
  return;
}
else if (txtarea.selectionEnd && (txtarea.selectionEnd - txtarea.selectionStart > 0))
{
  mozWrap(txtarea, bbopen, bbclose);
  return;
}
else
{
  txtarea.value += bbopen + bbclose;
  txtarea.focus();
}
storeCaret(txtarea);
}

function bbstyle(bbnumber) {
var txtarea = document.post.message;

txtarea.focus();
donotinsert = false;
theSelection = false;
bblast = 0;

if (bbnumber == -1) { // Close all open tags & default button names
  while (bbcode[0]) {
   butnumber = arraypop(bbcode) - 1;
   txtarea.value += bbtags[butnumber + 1];
   buttext = eval('document.post.addbbcode' + butnumber + '.value');
   eval('document.post.addbbcode' + butnumber + '.value ="' + buttext.substr(0,(buttext.length - 1)) + '"');
  }
  imageTag = false; // All tags are closed including image tags :D
  txtarea.focus();
  return;
}

if ((clientVer >= 4) && is_ie && is_win)
{
  theSelection = document.selection.createRange().text; // Get text selection
  if (theSelection) {
   // Add tags around selection
   document.selection.createRange().text = bbtags[bbnumber] + theSelection + bbtags[bbnumber+1];
   txtarea.focus();
   theSelection = '';
   return;
  }
}
else if (txtarea.selectionEnd && (txtarea.selectionEnd - txtarea.selectionStart > 0))
{
  mozWrap(txtarea, bbtags[bbnumber], bbtags[bbnumber+1]);
  return;
}

// Find last occurance of an open tag the same as the one just clicked
for (i = 0; i < bbcode.length; i++) {
  if (bbcode[i] == bbnumber+1) {
   bblast = i;
   donotinsert = true;
  }
}

if (donotinsert) {  // Close all open tags up to the one just clicked & default button names
  while (bbcode[bblast]) {
    butnumber = arraypop(bbcode) - 1;
    txtarea.value += bbtags[butnumber + 1];
    buttext = eval('document.post.addbbcode' + butnumber + '.value');
    eval('document.post.addbbcode' + butnumber + '.value ="' + buttext.substr(0,(buttext.length - 1)) + '"');
    imageTag = false;
   }
   txtarea.focus();
   return;
} else { // Open tags

  if (imageTag && (bbnumber != 14)) {  // Close image tag before adding another
   txtarea.value += bbtags[15];
   lastValue = arraypop(bbcode) - 1; // Remove the close image tag from the list
   document.post.addbbcode14.value = "Img"; // Return button back to normal state
   imageTag = false;
  }

  // Open tag
  txtarea.value += bbtags[bbnumber];
  if ((bbnumber == 14) && (imageTag == false)) imageTag = 1; // Check to stop additional tags after an unclosed image tag
  arraypush(bbcode,bbnumber+1);
  eval('document.post.addbbcode'+bbnumber+'.value += "*"');
  txtarea.focus();
  return;
}
storeCaret(txtarea);
}

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

// Insert at Claret 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();
}

//-->
</script>