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popup.js
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popup.js
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/*
popup.js
A lightweight general purpose JavaScript DOM element popup class.
Webpage:
http;//www.methods.co.nz/popup/popup.html
Inspired by:
Lightbox2: http://www.huddletogether.com/projects/lightbox2/
Lightbox Gone Wild: http://particletree.com/features/lightbox-gone-wild/
Tooltip: http://blog.innerewut.de/pages/tooltip
Prototype library: http://www.prototypejs.org/
Scriptaculous library: http://script.aculo.us/
Attributions:
- Uses the getPageSize() function from Lightbox v2.02 by Lokesh Dhakar
(http://www.huddletogether.com/projects/lightbox2/).
- Adapted the the modal overlay technique used in Lightbox v2.02 by Lokesh
Dhakar (http://www.huddletogether.com/projects/lightbox2/).
Version: 1.0.1
Author: Stuart Rackham <[email protected]>
License: This source code is released under the MIT license.
Copyright (c) Stuart Rackham 2007
*/
var Popup = Class.create();
Popup.zIndex = 1000; // z-index of first popup.
Popup.prototype = {
/*
Popup creation
*/
initialize: function(popup, link) {
var options = Object.extend({
modal: false,
effect: 'fade',
hidden: true,
closebox: 'popup_closebox', // CSS class name of click-to-close elements.
draghandle: 'popup_draghandle' // CSS class name of drag handle elements.
}, arguments[2] || {});
options.position = options.position || (options.modal ? 'center' : 'auto');
options.trigger = options.trigger || (options.modal ? 'click' : 'mouseover');
options.duration = this.first_value(options.duration, Popup.duration, 0.5);
options.show_duration = this.first_value(options.show_duration, options.duration);
options.hide_duration = this.first_value(options.hide_duration, options.duration);
options.opacity = this.first_value(options.opacity, Popup.opacity, 0.5);
options.show_delay = this.first_value(options.show_delay, Popup.show_delay, 500);
options.hide_delay = this.first_value(options.hide_delay, Popup.hide_delay, 200);
options.cursor_margin = this.first_value(options.cursor_margin, Popup.cursor_margin, 5);
this.options = options;
if (link) {
this.link = $(link);
}
this.popup = $(popup);
this.popup.popup = this; // Make the popup object a property of the DOM popup element.
if (options.hidden) {
this.popup.hide();
}
if (options.closebox) {
this.closeboxes = document.getElementsByClassName(options.closebox, this.popup);
if (this.popup.hasClassName(options.closebox)) {
this.closeboxes[this.closeboxes.length] = this.popup;
}
}
else {
this.closeboxes = [];
}
if (options.draghandle) {
var draghandles = document.getElementsByClassName(options.draghandle, this.popup);
for (i = 0; i < draghandles.length; i++) {
new Draggable(this.popup, { handle: draghandles[i] });
}
if (this.popup.hasClassName(options.draghandle)) {
new Draggable(this.popup, { handle: this.popup });
}
}
this.register_events();
},
/*
Event functions
*/
register_events: function() {
var trigger_function;
if (this.is_auto_open()) {
trigger_function = this.start_show_timer;
if (this.link) {
Event.observe(this.link, 'mouseout', this.stop_show_timer.bindAsEventListener(this));
}
}
else {
trigger_function = this.show;
}
if (this.link) {
Event.observe(this.link, this.options.trigger, trigger_function.bindAsEventListener(this));
}
if (!this.options.modal) {
Event.observe(this.popup, 'click', this.bring_to_front.bindAsEventListener(this));
}
if (this.closeboxes.length > 0) {
for (var i = 0; i < this.closeboxes.length; i++) {
Event.observe(this.closeboxes[i], 'click', this.hide.bindAsEventListener(this));
}
}
else {
if (this.link) {
Event.observe(this.link, 'mouseout', this.start_hide_timer.bindAsEventListener(this));
}
Event.observe(this.popup, 'mouseover', this.stop_hide_timer.bindAsEventListener(this));
Event.observe(this.popup, 'mouseout', this.start_hide_timer.bindAsEventListener(this));
}
},
bring_to_front: function(event) {
// Bring to front if not already there.
if (Number(this.popup.style.zIndex) < Popup.zIndex - 1) {
this.popup.style.zIndex = Popup.zIndex++;
}
},
start_show_timer: function(event) {
// NOTE: event is bound to this.show but it's state changes between being
// bound here and arriving at this.show -- specifically, the mouse
// coordinates are reset to zero). I've no idea why. Anyway, this is the
// reason for passing the event mouse coordinates as properties of this.
this.stop_show_timer(event);
this.mouse_x = Event.pointerX(event);
this.mouse_y = Event.pointerY(event);
this.show_timer = setTimeout(this.show.bind(this, event), this.options.show_delay);
},
stop_show_timer: function(event) {
if (this.show_timer) {
clearTimeout(this.show_timer);
this.show_timer = null;
}
},
start_hide_timer: function(event) {
this.stop_hide_timer(event);
this.hide_timer = setTimeout(this.hide.bind(this, event), this.options.hide_delay);
},
stop_hide_timer: function(event) {
if (this.hide_timer) {
clearTimeout(this.hide_timer);
this.hide_timer = null;
}
},
show: function(event) {
this.stop_show_timer(event);
this.stop_hide_timer(event);
if (this.is_open) {
return;
}
if (this.options.modal) {
this.show_overlay();
}
var pos;
if (!event) {
// We only arrive here if this.show has been called externally.
pos = this.get_popup_position();
}
else if (this.is_auto_open()) {
// Because auto-open popups calls this.show indirectly via start_show_timer.
pos = this.get_popup_position(this.mouse_x, this.mouse_y);
}
else {
pos = this.get_popup_position(Event.pointerX(event), Event.pointerY(event));
}
Element.setStyle(this.popup, { top: pos.y, left: pos.x, zIndex: Popup.zIndex++ });
this.is_open = true;
switch (this.options.effect) {
case 'slide':
Effect.SlideDown(this.popup, {duration: this.options.show_duration});
break;
case 'grow':
Effect.Grow(this.popup, {duration: this.options.show_duration});
break;
case 'blind':
Effect.BlindDown(this.popup, {duration: this.options.show_duration});
break;
case 'fade':
default:
Effect.Appear(this.popup, {duration: this.options.show_duration});
break;
}
},
hide: function(event){
this.is_open = false;
switch (this.options.effect) {
case 'slide':
Effect.SlideUp(this.popup, {duration: this.options.hide_duration});
break;
case 'grow':
Effect.Shrink(this.popup, {duration: this.options.hide_duration});
break;
case 'blind':
Effect.BlindUp(this.popup, {duration: this.options.hide_duration});
break;
case 'fade':
default:
Effect.Fade(this.popup, {duration: this.options.hide_duration});
break;
}
if (this.options.modal) {
this.hide_overlay();
}
},
/*
Helper functions
*/
// Return the first function argument that is not undefined.
// Because when zero numerical value are possible you can't use || chains.
first_value: function() {
for (var i = 0; i < arguments.length; i++) {
if (arguments[i] !== undefined) {
return arguments[i];
}
}
return undefined;
},
is_auto_open: function() {
return this.options.trigger == 'mouseover';
},
show_overlay: function() {
if (!Popup.overlay) {
var overlay = document.createElement('div');
overlay.setAttribute('id','popup_overlay');
overlay.style.display = 'none';
document.body.appendChild(overlay);
Popup.overlay = overlay;
Popup.overlay_levels = [];
}
Popup.overlay.style.height = this.get_page_dimensions().height + 'px';
var z = Popup.zIndex++;
Popup.overlay.style.zIndex = z;
Popup.overlay_levels.push(z);
if ( Popup.overlay_levels.length == 1) { // Opening the first modal popup.
// Queue the global overlay effect to ensure correct execution order.
new Effect.Appear(Popup.overlay,
{ duration: this.options.show_duration,
to: this.options.opacity,
queue: {position: 'end', scope: 'popup_overlay'}
});
}
else { // There is another modal popup at a lower level so move the overlay forward.
Popup.overlay.style.zIndex = z;
}
},
hide_overlay: function() {
Popup.overlay_levels.pop();
var z = Popup.overlay_levels.pop();
if (z) { // There is another modal popup at a lower level so move the overlay back.
Popup.overlay_levels.push(z);
Popup.overlay.style.zIndex = z;
}
else { // The last modal popup is being closed so hide the overlay
// Queue the global overlay effect to ensure correct execution order.
new Effect.Fade(Popup.overlay,
{ duration: this.options.hide_duration,
queue: {position: 'end', scope: 'popup_overlay'}
});
}
},
/*
Positioning functions
*/
// Return the top and left CSS position strings as an {x,y} object that the
// popup should be shown at. mouse_x and mouse_y are the mouse x,y coordinates
// numbers when the popup was triggered.
get_popup_position: function(mouse_x, mouse_y) {
var pos;
switch (this.options.position) {
case 'auto':
pos = this.get_auto_position(mouse_x, mouse_y);
break;
case 'center':
pos = this.get_center_position();
break;
case 'below':
pos = this.get_below_position();
break;
default:
// Check for x,y postion format (x and y can be any valid CSS left or
// top property value).
if (mo = this.options.position.match(/^\s*([^\s,]+)\s*,\s*([^\s,]+)\s*$/)) {
pos = {x: mo[1], y: mo[2]};
// If possible convert to numbers.
pos.x = Number(pos.x) || pos.x;
pos.y = Number(pos.y) || pos.y;
}
else {
pos = {x: 0, y: 0};
}
break;
}
if (typeof pos.x == 'number') {
pos.x += 'px';
}
if (typeof pos.y == 'number') {
pos.y += 'px';
}
return pos;
},
get_below_position: function() {
var pos = Position.cumulativeOffset(this.link);
return {x: pos[0], y: pos[1] + Element.getHeight(this.link)};
},
get_center_position: function() {
dim = Element.getDimensions(this.popup);
var popup_width = dim.width;
var popup_height = dim.height;
dim = this.get_viewport_dimensions();
var viewport_width = dim.width;
var viewport_height = dim.height;
var x;
if (popup_width >= viewport_width) {
x = 0;
}
else {
x = (viewport_width - popup_width)/2;
}
var y;
if (popup_height >= viewport_height) {
y = 0;
}
else {
y = (viewport_height - popup_height)/2;
}
return {x: x, y: y};
},
get_auto_position: function(mouse_x, mouse_y) {
dim = Element.getDimensions(this.popup);
var popup_width = dim.width;
var popup_height = dim.height;
dim = this.get_viewport_dimensions();
var viewport_width = dim.width;
var viewport_height = dim.height;
var available_right = viewport_width - (mouse_x + this.options.cursor_margin);
var available_left = mouse_x - this.options.cursor_margin;
var available_top = mouse_y - this.options.cursor_margin;
var available_bottom = viewport_height - (mouse_x + this.options.cursor_margin);
var offset = this.options.cursor_margin;
var x = mouse_x;
var y = mouse_y;
if (popup_width >= viewport_width) {
x = 0;
}
else if (popup_width <= available_right) {
x += offset;
}
else if (popup_width <= available_left) {
x -= popup_width + offset;
}
else if (available_right >= available_left) {
x = viewport_width - popup_width;
}
else {
x = 0;
}
if (popup_height >= viewport_height) {
y = 0;
}
else if (popup_height <= available_bottom) {
y += offset;
}
else if (popup_height <= available_top) {
y -= popup_height + offset;
}
else if (available_bottom >= available_top) {
y = viewport_height - popup_height;
}
else {
y = 0;
}
return {x: x, y: y};
},
get_viewport_dimensions: function() {
var dim = this.getPageSize();
return {width: dim[2], height: dim[3]};
},
get_page_dimensions: function() {
var dim = this.getPageSize();
return {width: dim[0], height: dim[1]};
},
// This function from Lightbox v2.02 by Lokesh Dhakar
// (http://www.huddletogether.com/projects/lightbox2/).
//
// Returns array with page width, height and window width, height
// Core code from - quirksmode.org
// Edit for Firefox by pHaez
//
getPageSize: function() {
var xScroll, yScroll;
if (window.innerHeight && window.scrollMaxY) {
xScroll = document.body.scrollWidth;
yScroll = window.innerHeight + window.scrollMaxY;
} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
xScroll = document.body.scrollWidth;
yScroll = document.body.scrollHeight;
} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
xScroll = document.body.offsetWidth;
yScroll = document.body.offsetHeight;
}
var windowWidth, windowHeight;
if (self.innerHeight) { // all except Explorer
windowWidth = self.innerWidth;
windowHeight = self.innerHeight;
} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
windowWidth = document.documentElement.clientWidth;
windowHeight = document.documentElement.clientHeight;
} else if (document.body) { // other Explorers
windowWidth = document.body.clientWidth;
windowHeight = document.body.clientHeight;
}
// for small pages with total height less then height of the viewport
if(yScroll < windowHeight){
pageHeight = windowHeight;
} else {
pageHeight = yScroll;
}
// for small pages with total width less then width of the viewport
if(xScroll < windowWidth){
pageWidth = windowWidth;
} else {
pageWidth = xScroll;
}
arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight);
return arrayPageSize;
}
}