/*
Common JavaScript functions for 
CPLIB - CorePublish 

Written by 
Arve Skjørestad 
CoreTrek AS

Modified:
	12.07.2001	Arve Skjørestad
		- changed slideshow() so that it can display more than 10 images.
*/

// variable declarations
var cp2_loaded = false;
var cp2_keywordlayer;
var x;
var y;


/***************** Common functions. ********************************/

/*
  	function to init 
*/
function cp2_init()
	{
	// Mouse position capture
	ns4 = document.layers?true:false;
	ns5 = (document.getElementById && !document.all)?true:false;
	ie5 = document.all?true:false;
	ie4 = (!document.getElementById && document.all)?true:false;
	
	if(ns4 || ns5)
	 document.captureEvents(Event.MOUSEMOVE);
	
	document.onmousemove=catchXY;

	// setting up keyword layer
	cp2_keywordlayer = new ct_layer("cp2keywordlayer");

	// Tell that document is loaded.
	cp2_loaded = true;
	}

// Calling the init function.
window.onload = cp2_init;
document.onclick = cp2_keywords_hide;

/*
	This is a function to catch the x and y coordinates of the mouse
*/
function catchXY(e)
   {
   // capture click coordinates
   x=(ns4 || ns5)?e.pageX:event.x+document.body.scrollLeft;
   y=(ns4 || ns5)?e.pageY:event.y+document.body.scrollTop;
   //window.status= "x:"+x+" y:"+y;
   }


/*
  function to easy open an window
*/
function ct_win(win_url,height,width, props) {
	win_name = "ct_win";
    if (props &&  props.length > 1 ) {
        win_props = props ;
    } else {
        win_props ="height="+height+",width="+width+",screenX=400,screenY=100";
    }
	window.open(win_url,win_name,win_props);
}

/***************** Image and preload functions. ********************************/

function ct_image(img)
	{
	if(!cp2_loaded) {
		return false;
    }

	a=new Image(); 
	a.src=img; 
	return a;
	} 

function ct_swap(docname,swapimage)
	{
	if(!cp2_loaded)
		return;
	document[docname].src = swapimage.src ;
	}

/***************** Functions used by article elements ********************************/

/**
 *  Function used to print flash and movies inline
 *
 *  Done this way to avoid the EOLAS patent
 *
 */
function cpWriteActiveX(activeXstring){
    document.write(activeXstring);
}

/**
 *  Function used to print flash and movies inline
 *
 *  *) These settings might not work in all browser plugins
 *
 *  @userBrowser string [IE|MOZ] Users browser
 *  @src         string The full URL to the video
 *  @srcSession  string The full URL to the video including phpsessionid (used for IE)
 *  @width       int The width
 *  @height      int The height
 *  @mimetype    string The files mimetype
 *  @loop        boolean Whether or not to loop the video *
 *  @autoplay    boolean Whether or not to start the video when it's loaded *
 *  @controller  boolean Whether or not to include plugin controllers *
 */
function cpWriteMediaObject(userBrowser, src, srcSession, width, height, mimeType, loop, autoplay, controller){
    // Get video data
    var src = (userBrowser == 'IE'?srcSession:src);
    
    // Handling IE specialties
    var rewriteMimeType = new Object();
    if (userBrowser == 'IE'){
        rewriteMimeType['audio/mpeg'] = 'application/x-mplayer2';
        rewriteMimeType['video/mpeg'] = 'application/x-mplayer2';
        rewriteMimeType['video/x-msvideo'] = 'video/x-ms-wmv';
    }
    // In some cases we must change the mimetype for IE :/
    if (rewriteMimeType[mimeType] != null){
        mimeType = rewriteMimeType[mimeType];
    }
    
    var objectSettings = '';
    if (mimeType != 'application/x-shockwave-flash'){
        objectSettings += '<param name="loop" value="' +(loop?'true':'false') +'" />';
        objectSettings += '<param name="autostart" value="' +(autoplay?'true':'false') +'" />';
        objectSettings += '<param name="controller" value="' +(controller?'true':'false') +'" />';
    }

	// Build object tag and content
    var objectString = '';
    var objectStringStart = '<object type="' +mimeType +'" data="' +src +'" width="' +width +'" height="' +height +'">';
    var objectStringName = '<param name="movie" value="' +src +'" />';
    var objectStringFallback = '<p>(No plugin detected for your OS/browser)</p>';
    var objectStringEnd = '</object>';
    switch (mimeType) {
        case 'application/x-mplayer2':
        case 'video/x-ms-wmv':
        case 'video/x-msvideo':
    		// WMV, MPEG
            objectStringName = '<param name="src" value="' +src +'" />';
    		break;
    		
    	case 'video/quicktime':
    	    // Quicktime in IE
    	    if (userBrowser == 'IE'){
    	        objectStringStart = '<object classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" codebase="http://www.apple.com/qtactivex/qtplugin.cab" width="' +width +'" height="' +height +'">';
                objectStringName  = '<param name="src" value="' +src +'" />';
                break;
    	    }
    	    break;
    	
    	case 'video/x-ms-asf':
    	    // ASF in IE
    	    if (userBrowser == 'IE'){
                objectStringName = '<param name="FileName" value="' +src +'" />';
                break;
    	    }
    	    break;
    	        
    	default:
    		break;
    }
    
    objectString += objectStringStart;
    objectString += objectStringName;
    objectString += objectSettings;
    objectString += objectStringFallback;
    objectString += objectStringEnd;
    
    document.write(objectString);
}

/*
  	slideshow function, used to navigate back and forward 
	in a slideshow element.
*/
function slideshow(thearray,imgname,pos,what,theform){
	if(!cp2_loaded)
		return;

	i=eval("slidepos"+pos);
	count=eval("count"+pos);
	
	// Show next picture
	if(what=="next" && thearray[i+1])
		{
		// Load image before we display it, then swap
		temp = ct_image(thearray[i+1]);
		document[imgname].src = temp.src;
		eval("slidepos"+pos+"++"); // increase counter
		theform.slidetext.value = (i+2)+ " av "+ count; // Set status text
		}
	
	// Show previous picture
	if(what=="previous" && i>0 && thearray[i-1])
		{
		temp = ct_image(thearray[i-1]);
		document[imgname].src = temp.src;
		eval("slidepos"+pos+"--");
		theform.slidetext.value = (i)+ " av "+ count;
		}
	}

/*
	Function to display keywords in a litle popup box.
*/
function cp2_keywords(keyword_id) {
	cp2_keywordlayer.moveTo(x,y);
	cp2_keywordlayer.setSource("keywords_popup.php?id="+keyword_id,160,160);
	cp2_keywordlayer.show();
}

function cp2_keywords_hide() {
	if(!cp2_loaded)
	   return;

	try {
		if(cp2_keywordlayer.isVisible()) {
			cp2_keywordlayer.hide();
		}
	} catch (e) {
		// no-op
	}
}


/**
*   function that returns the position for the given element.
*
*
*
*/
function getAbsoluteElementPosition(el){
	for (var lx=0,ly=0;el!=null;
		lx+=el.offsetLeft,ly+=el.offsetTop,el=el.offsetParent);
	return {x:lx,y:ly}
}

function CpAddEvent(elm, evType, fn, useCapture) {
	if (elm.addEventListener) {
		elm.addEventListener(evType, fn, useCapture);
		return true;
	}
	else if (elm.attachEvent) {
		var r = elm.attachEvent('on' + evType, fn);
		return r;
	}
	else {
		elm['on' + evType] = fn;
	}
}

function CpRemoveEvent (elm, evType, fn, useCapture) {
	if (elm.removeEventListener) {
		elm.removeEventListener(evType, fn, useCapture);
		return true;
	}
	else if (elm.detachEvent) {
		var r = elm.detachEvent('on' + evType, fn);
		return r;
	}
	else {
		elm['on' + evType] = null;
	}
}