/**
  * BLOG:CMS - http://blogcms.com
  * Copyright (C) 2003-2004 Radek HULAN
  *
  * 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 = false;
var nucleusMediaPopupURL = '';
var nucleusMediaURL = 'media/';
var nucleusAuthorId = 0;
var knowAllObj = typeof document.all != 'undefined' ? true : false;

function setConvertBreaks(newval) {	nucleusConvertBreaks = newval; }
function setMediaUrl(url) { nucleusMediaURL = url; }
function setAuthorId(id) { nucleusAuthorId = id; }

// 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;
	var p = s.indexOf(a);
	if (p == -1) return s;
	var 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('<strong>','</strong>'); }
function italicThis() { insertAroundCaret('<em>','</em>'); }
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() {

	var strSelection = typeof document.selection != 'undefined' ? document.selection.createRange().text : '';

	var 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);
}


var nonie_FormType = 'textbody';

// 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) {
   var text = isCaretEmpty() ? prompt("Text to display ?","") : 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);
}


function includeOtherMedia(collection, filename) {
   var text = isCaretEmpty() ? prompt("Text to display ?","") : 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);
}



// 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 (typeof textEl.createTextRange != 'undefined') 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 && (typeof textEl.createTextRange != 'undefined') && textEl.caretPos) {
		var caretPos = textEl.caretPos;
		caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? text + ' ' : text;
	} else if (!knowAllObj && document.getElementById) {
		mozReplace(document.getElementById(nonie_FormType), text);
	} else if (textEl) {
		textEl.value  += text;
	} else {
		document.getElementById(nonie_FormType).value += text;
	}
}

// inserts a tag around the selected text
function insertAroundCaret (textpre, textpost) {
	var textEl = lastSelected;
	if (textEl && (typeof textEl.createTextRange != 'undefined') && textEl.caretPos) {
		var caretPos = textEl.caretPos;
		caretPos.text = textpre + caretPos.text + textpost;
	} else if (!knowAllObj && document.getElementById) {
		mozWrap(document.getElementById(nonie_FormType), textpre, textpost);
	} else {
		document.getElementById(nonie_FormType).value += textpre + textpost;
	}
}

/* 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(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 (!knowAllObj && document.getElementById)
		return mozSelectedText();
	else
		return lastSelected.caretPos.text;
}

function isCaretEmpty() {
   if (!knowAllObj && document.getElementById)
		return (mozSelectedText() == '');
	else if (lastSelected && (typeof lastSelected.createTextRange != 'undefined') && lastSelected.caretPos)
		return (lastSelected.caretPos.text == '');
	else
		return true;
}

function BtnHighlight(el) {
  var els = el.style;
  els.borderLeft="1px solid gray";
  els.borderRight="1px solid #e9e9e9";
  els.borderTop="1px solid gray";
  els.borderBottom="1px solid #e9e9e9";
}

function BtnNormal(el) {
  var els = el.style;
  els.padding="3px";
  els.border="1px solid #dddddd";
}