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| Original Author: Vidar Løvbrekke Sømme                                       |
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// ===================================================================
// Author: Matt Kruse <matt <at> mattkruse <dot> com>
// WWW: http://www.mattkruse.com/
// ===================================================================

/* 
PopupWindow.js
Author: Matt Kruse
Last modified: 02/16/04

DESCRIPTION: This object allows you to easily and quickly popup a window
in a certain place. The window can either be a DIV or a separate browser
window.

COMPATABILITY: Works with Netscape 4.x,  6.x,  IE 5.x on Windows. Some small
positioning errors - usually with Window positioning - occur on the 
Macintosh platform. Due to bugs in Netscape 4.x,  populating the popup 
window with <STYLE> tags may cause errors.

USAGE:
// Create an object for a WINDOW popup
var win = new PopupWindow(); 

// Create an object for a DIV window using the DIV named 'mydiv'
var win = new PopupWindow('mydiv'); 

// Set the window to automatically hide itself when the user clicks 
// anywhere else on the page except the popup
win.autoHide(); 

// Show the window relative to the anchor name passed in
win.showPopup(anchorname);

// Hide the popup
win.hidePopup();

// Set the size of the popup window (only applies to WINDOW popups
win.setSize(width, height);

// Populate the contents of the popup window that will be shown. If you 
// change the contents while it is displayed,  you will need to refresh()
win.populate(string);

// set the URL of the window,  rather than populating its contents
// manually
win.setUrl("http://www.site.com/");

// Refresh the contents of the popup
win.refresh();

// Specify how many pixels to the right of the anchor the popup will appear
win.offsetX = 50;

// Specify how many pixels below the anchor the popup will appear
win.offsetY = 100;

NOTES:
1) Requires the functions in AnchorPosition.js

2) Your anchor tag MUST contain both NAME and ID attributes which are the 
   same. For example:
   <A NAME="test" ID="test"> </A>

3) There must be at least a space between <A> </A> for IE5.5 to see the 
   anchor tag correctly. Do not do <A></A> with no space.

4) When a PopupWindow object is created,  a handler for 'onmouseup' is
   attached to any event handler you may have already defined. Do NOT define
   an event handler for 'onmouseup' after you define a PopupWindow object or
   the autoHide() will not work correctly.
*/ 

// Set the position of the popup window based on the anchor
function PopupWindow_getXYPosition(anchorname) {
    var coordinates;
    if (this.type == "WINDOW") {
        coordinates = getAnchorWindowPosition(anchorname);
        }
    else {
        coordinates = getAnchorPosition(anchorname);
        }
    this.x = coordinates.x;
    this.y = coordinates.y;
    }
// Set width/height of DIV/popup window
function PopupWindow_setSize(width, height) {
    this.width = width;
    this.height = height;
    }
// Fill the window with contents
function PopupWindow_populate(contents) {
    this.contents = contents;
    this.populated = false;
    }
// Set the URL to go to
function PopupWindow_setUrl(url) {
    this.url = url;
    }
// Set the window popup properties
function PopupWindow_setWindowProperties(props) {
    this.windowProperties = props;
    }
// Refresh the displayed contents of the popup
function PopupWindow_refresh() {
    if (this.divName != null) {
        // refresh the DIV object
        if (this.use_gebi) {
            document.getElementById(this.divName).innerHTML = this.contents;
            }
        else if (this.use_css) { 
            document.all[this.divName].innerHTML = this.contents;
            }
        else if (this.use_layers) { 
            var d = document.layers[this.divName]; 
            d.document.open();
            d.document.writeln(this.contents);
            d.document.close();
            }
        }
    else {
        if (this.popupWindow != null && !this.popupWindow.closed) {
            if (this.url!="") {
                this.popupWindow.location.href=this.url;
                }
            else {
                this.popupWindow.document.open();
                this.popupWindow.document.writeln(this.contents);
                this.popupWindow.document.close();
            }
            this.popupWindow.focus();
            }
        }
    }
// Position and show the popup,  relative to an anchor object
function PopupWindow_showPopup(anchorname) {
    this.getXYPosition(anchorname);
    this.x += this.offsetX;
    this.y += this.offsetY;
    if (!this.populated && (this.contents != "")) {
        this.populated = true;
        this.refresh();
        }
    if (this.divName != null) {
        // Show the DIV object
        if (this.use_gebi) {
            document.getElementById(this.divName).style.left = this.x + "px";
            document.getElementById(this.divName).style.top = this.y + "px";
            document.getElementById(this.divName).style.visibility = "visible";
            }
        else if (this.use_css) {
            document.all[this.divName].style.left = this.x;
            document.all[this.divName].style.top = this.y;
            document.all[this.divName].style.visibility = "visible";
            }
        else if (this.use_layers) {
            document.layers[this.divName].left = this.x;
            document.layers[this.divName].top = this.y;
            document.layers[this.divName].visibility = "visible";
            }
        }
    else {
        if (this.popupWindow == null || this.popupWindow.closed) {
            // If the popup window will go off-screen,  move it so it doesn't
            if (this.x<0) { this.x=0; }
            if (this.y<0) { this.y=0; }
            if (screen && screen.availHeight) {
                if ((this.y + this.height) > screen.availHeight) {
                    this.y = screen.availHeight - this.height;
                    }
                }
            if (screen && screen.availWidth) {
                if ((this.x + this.width) > screen.availWidth) {
                    this.x = screen.availWidth - this.width;
                    }
                }
            var avoidAboutBlank = window.opera || ( document.layers && !navigator.mimeTypes['*'] ) || navigator.vendor == 'KDE' || ( document.childNodes && !document.all && !navigator.taintEnabled );
            this.popupWindow = window.open(avoidAboutBlank?"":"about:blank", "window_"+anchorname, this.windowProperties+", width="+this.width+", height="+this.height+", screenX="+this.x+", left="+this.x+", screenY="+this.y+", top="+this.y+"");
            }
        this.refresh();
        }
    }
// Hide the popup
function PopupWindow_hidePopup() {
    if (this.divName != null) {
        if (this.use_gebi) {
            document.getElementById(this.divName).style.visibility = "hidden";
            }
        else if (this.use_css) {
            document.all[this.divName].style.visibility = "hidden";
            }
        else if (this.use_layers) {
            document.layers[this.divName].visibility = "hidden";
            }
        }
    else {
        if (this.popupWindow && !this.popupWindow.closed) {
            this.popupWindow.close();
            this.popupWindow = null;
            }
        }
    }
// Pass an event and return whether or not it was the popup DIV that was clicked
function PopupWindow_isClicked(e) {
    if (this.divName != null) {
        if (this.use_layers) {
            var clickX = e.pageX;
            var clickY = e.pageY;
            var t = document.layers[this.divName];
            if ((clickX > t.left) && (clickX < t.left+t.clip.width) && (clickY > t.top) && (clickY < t.top+t.clip.height)) {
                return true;
                }
            else { return false; }
            }
        else if (document.all) { // Need to hard-code this to trap IE for error-handling
            var t = window.event.srcElement;
            while (t.parentElement != null) {
                if (t.id==this.divName) {
                    return true;
                    }
                t = t.parentElement;
                }
            return false;
            }
        else if (this.use_gebi && e) {
            var t = e.originalTarget;
            while (t.parentNode != null) {
                if (t.id==this.divName) {
                    return true;
                    }
                t = t.parentNode;
                }
            return false;
            }
        return false;
        }
    return false;
    }

// Check an onMouseDown event to see if we should hide
function PopupWindow_hideIfNotClicked(e) {
    if (this.autoHideEnabled && !this.isClicked(e)) {
        this.hidePopup();
        }
    }
// Call this to make the DIV disable automatically when mouse is clicked outside it
function PopupWindow_autoHide() {
    this.autoHideEnabled = true;
    }
// This global function checks all PopupWindow objects onmouseup to see if they should be hidden
function PopupWindow_hidePopupWindows(e) {
    for (var i=0; i<popupWindowObjects.length; i++) {
        if (popupWindowObjects[i] != null) {
            var p = popupWindowObjects[i];
            p.hideIfNotClicked(e);
            }
        }
    }
// Run this immediately to attach the event listener
function PopupWindow_attachListener() {
    if (document.layers) {
        document.captureEvents(Event.MOUSEUP);
        }
    window.popupWindowOldEventListener = document.onmouseup;
    if (window.popupWindowOldEventListener != null) {
        document.onmouseup = new Function("window.popupWindowOldEventListener(); PopupWindow_hidePopupWindows();");
        }
    else {
        document.onmouseup = PopupWindow_hidePopupWindows;
        }
    }
// CONSTRUCTOR for the PopupWindow object
// Pass it a DIV name to use a DHTML popup,  otherwise will default to window popup
function PopupWindow() {
    if (!window.popupWindowIndex) { window.popupWindowIndex = 0; }
    if (!window.popupWindowObjects) { window.popupWindowObjects = new Array(); }
    if (!window.listenerAttached) {
        window.listenerAttached = true;
        PopupWindow_attachListener();
        }
    this.index = popupWindowIndex++;
    popupWindowObjects[this.index] = this;
    this.divName = null;
    this.popupWindow = null;
    this.width=0;
    this.height=0;
    this.populated = false;
    this.visible = false;
    this.autoHideEnabled = false;
    
    this.contents = "";
    this.url="";
    this.windowProperties="toolbar=no, location=no, status=no, menubar=no, scrollbars=auto, resizable, alwaysRaised, dependent, titlebar=no";
    if (arguments.length>0) {
        this.type="DIV";
        this.divName = arguments[0];
        }
    else {
        this.type="WINDOW";
        }
    this.use_gebi = false;
    this.use_css = false;
    this.use_layers = false;
    if (document.getElementById) { this.use_gebi = true; }
    else if (document.all) { this.use_css = true; }
    else if (document.layers) { this.use_layers = true; }
    else { this.type = "WINDOW"; }
    this.offsetX = 0;
    this.offsetY = 0;
    // Method mappings
    this.getXYPosition = PopupWindow_getXYPosition;
    this.populate = PopupWindow_populate;
    this.setUrl = PopupWindow_setUrl;
    this.setWindowProperties = PopupWindow_setWindowProperties;
    this.refresh = PopupWindow_refresh;
    this.showPopup = PopupWindow_showPopup;
    this.hidePopup = PopupWindow_hidePopup;
    this.setSize = PopupWindow_setSize;
    this.isClicked = PopupWindow_isClicked;
    this.autoHide = PopupWindow_autoHide;
    this.hideIfNotClicked = PopupWindow_hideIfNotClicked;
    }