/**

  * Nucleus: PHP/MySQL Weblog CMS (http://nucleuscms.org/) 

  * Copyright (C) 2002-2004 The Nucleus Group

  *

  * This program is free software; you can redistribute it and/or

  * modify it under the terms of the GNU General Public License

  * as published by the Free Software Foundation; either version 2

  * of the License, or (at your option) any later version.

  * (see nucleus/documentation/index.html#license for more info)

  *

  * This file contains functions to allow adding items from inside the weblog.

  * Also contains code to avoid submitting form data twice.

  */



var nucleusConvertBreaks = true;

var nucleusMediaPopupURL = '';

var nucleusMediaURL = 'media/';

var nucleusAuthorId = 0;



function setConvertBreaks(newval) {	nucleusConvertBreaks = newval; }

function setMediaUrl(url) { nucleusMediaURL = url; }

function setAuthorId(id) { nucleusAuthorId = id; }



function preview(id, value) {

	elem = document.getElementById(id);

	if (!elem) return;

	

	var preview = nucleusConvertBreaks ? str_replace("\n","<br />",value)+"&nbsp;" : value+"&nbsp;";

	

	// expand the media commands (without explicit collection)

	preview = preview.replace(/\<\%image\(([^\/\|]*)\|([^\|]*)\|([^\|]*)\|([^)]*)\)\%\>/g,"<img src='"+nucleusMediaURL+nucleusAuthorId+"/$1' width='$2' height='$3' alt=\"$4\" />");

	

	// expand the media commands (with collection)

	preview = preview.replace(/\<\%image\(([^\|]*)\|([^\|]*)\|([^\|]*)\|([^)]*)\)\%\>/g,"<img src='"+nucleusMediaURL+"$1' width='$2' height='$3' alt=\"$4\" />");

	preview = preview.replace(/\<\%popup\(([^\|]*)\|([^\|]*)\|([^\|]*)\|([^)]*)\)\%\>/g,"<a href='' onclick='if (event &amp;&amp; event.preventDefault) event.preventDefault(); alert(\"popup image\"); return false;' title='popup'>$4</a>");

	preview = preview.replace(/\<\%media\(([^\|]*)\|([^)]*)\)\%\>/g,"<a href='' title='media link'>$2</a>");	

	

	elem.innerHTML = preview;

}



function showedit() {

	prevval = document.getElementById('edit').style.display;

	if (prevval == "block")

		newval = "none";

	else

		newval = "block";

	document.getElementById('edit').style.display = newval;



	if (newval == "block")

		updAllPreviews();	

}



function updAllPreviews() {

	updPreview('title');

	updPreview('body');

	updPreview('more');

}



function isEditVisible() {

	var editform = document.getElementById('edit');

	if (!editform) return true;

	var prevval = editform.style.display;

	return (prevval == "none") ? false : true;

}



function updPreview(id) {

	// don't update when preview is hidden

	if (!isEditVisible()) return;

	

	var inputField = document.getElementById('input' + id);

	if (!inputField) return;

	preview('prev' + id, inputField.value);

}



// replace a in s by b (taken from milov.nl)

function str_replace(a, b, s)

{

	if (a == b || !s.length || !a.length) return s;

	if ((p=s.indexOf(a)) == -1) { return s; }

	else { ns = s.substring(0,p) + b + s.substring(p+a.length,s.length); }

	return (s.indexOf(a) != -1) ? str_replace(a, b, ns) : ns;

}



function shortCuts() {

	if (!event || (event.ctrlKey != true)) return;

	

	switch (event.keyCode) {

		case 1:

			ahrefThis(); break; // ctrl-shift-a

		case 2:

			boldThis(); break; // ctrl-shift-b

		case 9:

			italicThis(); break; // ctrl-shift-i

		case 13:

			addMedia(); break; // ctrl-shift-m

		default: 

			return;

	}

	return;

}



function cutThis() { execAndUpdate('cut'); }

function copyThis() { execAndUpdate('copy'); }

function pasteThis() { execAndUpdate('paste'); }

function boldThis() { insertAroundCaret('<b>','</b>'); }

function italicThis() { insertAroundCaret('<i>','</i>'); }

function leftThis() { insertAroundCaret('<div class="leftbox">','</div>'); }

function rightThis() { insertAroundCaret('<div class="rightbox">','</div>'); }

function alignleftThis() { insertAroundCaret('<div style="text-align: left">','</div>'); }

function alignrightThis() { insertAroundCaret('<div style="text-align: right">','</div>'); }

function aligncenterThis() { insertAroundCaret('<div style="text-align: center">','</div>'); }





function ahrefThis() {

	if (document.selection)

		strSelection = document.selection.createRange().text;

	else

		strSelection = '';

		

	strHref = prompt("Create a link to:","http://");

	if (strHref == null) return;

	

	var textpre = "<a href=\"" + strHref + "\">";

	insertAroundCaret(textpre, "</a>");

}



function execAndUpdate(action) {

	lastSelected.caretPos.execCommand(action);

	updAllPreviews();	

}





var nonie_FormType = 'body';



// Add media to new item

function addMedia() {

	

	var mediapopup = window.open(nucleusMediaPopupURL + 'media.php','name',

		'status=yes,toolbar=no,scrollbars=yes,resizable=yes,width=500,height=450,top=0,left=0');



	return;

} 





function setMediaPopupURL(url) {

	nucleusMediaPopupURL = url;

}



function includeImage(collection, filename, type, width, height) {

	if (isCaretEmpty()) {

		text = prompt("Text to display ?","");

	} else {

		text = getCaretText();

	}

	

	// add collection name when not private collection (or editing a message that's not your)

	var fullName;

	if (isNaN(collection) || (nucleusAuthorId != collection)) {

		fullName = collection + '/' + filename;

	} else {

		fullName = filename;

	}

		

	

	var replaceBy;

	switch(type) {

		case 'popup':

			replaceBy = '<%popup(' +  fullName + '|'+width+'|'+height+'|' + text +')%>';

			break;

		case 'inline':

		default:

			replaceBy = '<%image(' +  fullName + '|'+width+'|'+height+'|' + text +')%>';

	}

	

	insertAtCaret(replaceBy);

	updAllPreviews();	



}





function includeOtherMedia(collection, filename) {

	if (isCaretEmpty()) {

		text = prompt("Text to display ?","");

	} else {

		text = getCaretText();

	}

	

	// add collection name when not private collection (or editing a message that's not your)

	var fullName;

	if (isNaN(collection) || (nucleusAuthorId != collection)) {

		fullName = collection + '/' + filename;

	} else {

		fullName = filename;

	}	

	

	var replaceBy = '<%media(' +  fullName + '|' + text +')%>';

	

	insertAtCaret(replaceBy);

	updAllPreviews();	

}







// function to prevent submitting form data twice

var submitcount=0;

function checkSubmit() {

	if (submitcount == 0) {

		submitcount++;

		return true;

	} else {

		return false;

	}

}





// code to store the caret (cursor) position of a text field/text area

// taken from javascript.faqts and modified

// http://www.faqts.com/knowledge_base/view.phtml/aid/1052/fid/130



// stores the caret

function storeCaret (textEl) {



	// store caret

	if (textEl.createTextRange) 

		textEl.caretPos = document.selection.createRange().duplicate();



	// also store lastselectedelement

	lastSelected = textEl;

	

	nonie_FormType = textEl.name;

}



var lastSelected;



// inserts text at caret (overwriting selection)

function insertAtCaret (text) {

	var textEl = lastSelected;

	if (textEl && textEl.createTextRange && textEl.caretPos) {

		var caretPos = textEl.caretPos;

		caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? text + ' ' : text;

	} else if (!document.all && document.getElementById) {

		mozReplace(document.getElementById('input' + nonie_FormType), text);				

	} else if (textEl) {

		textEl.value  += text;

	} else {

		document.getElementById('input' + nonie_FormType).value += text;		

	}

	updAllPreviews();

}



// inserts a tag around the selected text

function insertAroundCaret (textpre, textpost) {

	var textEl = lastSelected;

	

	if (textEl && textEl.createTextRange && textEl.caretPos) {

		var caretPos = textEl.caretPos;

		caretPos.text = textpre + caretPos.text + textpost;

	} else if (!document.all && document.getElementById) {

		mozWrap(document.getElementById('input' + nonie_FormType), textpre, textpost);		

	} else {

		document.getElementById('input' + nonie_FormType).value += textpre + textpost;

	}



	updAllPreviews();

}



/* some methods to get things working in Mozilla as well */

function mozWrap(txtarea, lft, rgt) {

	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 + lft + s2 + rgt + s3;

}

function mozReplace(txtarea, newText) {

	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 + newText + s3;

}

function mozSelectedText() {

	var txtarea = document.getElementById('input' + nonie_FormType);

	var selLength = txtarea.textLength;

	var selStart = txtarea.selectionStart;

	var selEnd = txtarea.selectionEnd;

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

	return (txtarea.value).substring(selStart, selEnd);

}



function getCaretText() {

	if (!document.all && document.getElementById)

		return mozSelectedText();

	else

		return lastSelected.caretPos.text;

}



function isCaretEmpty() {

	if (lastSelected && lastSelected.createTextRange && lastSelected.caretPos)

		return (lastSelected.caretPos.text == '');

	else if (!document.all && document.getElementById)

		return (mozSelectedText() == '');

	else

		return true;

}



function BtnHighlight(el) {

	with(el.style){

		borderLeft="1px solid gray";

		borderRight="1px solid #e9e9e9";

		borderTop="1px solid gray";

		borderBottom="1px solid #e9e9e9";

	}

}



function BtnNormal(el) {

	with(el.style){

		padding="3px";

		border="1px solid #dddddd";

	}

}