From 9cda74ef1256752edb84f2be9a0629b54fd5a7a8 Mon Sep 17 00:00:00 2001
From: "Alex A. Naanou" <alex.nanou@gmail.com>
Date: Fri, 26 Apr 2013 23:07:07 +0400
Subject: [PATCH] added more generic libs, and some minor changes...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
---
 ui/Gen3-TODO.otl    |   3 +-
 ui/index.html       |   7 +
 ui/lib/_template.js |  16 ++
 ui/lib/jli.js       | 571 ++++++++++++++++++++++++++++++++++++++++++++
 ui/lib/keyboard.js  | 326 +++++++++++++++++++++++++
 ui/lib/scroller.js  | 513 +++++++++++++++++++++++++++++++++++++++
 6 files changed, 1435 insertions(+), 1 deletion(-)
 create mode 100755 ui/lib/_template.js
 create mode 100755 ui/lib/jli.js
 create mode 100755 ui/lib/keyboard.js
 create mode 100755 ui/lib/scroller.js

diff --git a/ui/Gen3-TODO.otl b/ui/Gen3-TODO.otl
index fde0f17c..d4606f69 100755
--- a/ui/Gen3-TODO.otl
+++ b/ui/Gen3-TODO.otl
@@ -3,6 +3,7 @@
 	[_] migrate the infinite ribbon code
 	[_] migrate the PortableMag generic code
 	[_] write basic align code
+		
 
 
 Generation 3 UI implementation
@@ -46,7 +47,7 @@ Generation 3 UI implementation
 		| +/- 90 deg
 	UI modes
 		single ribbon
-			show images above/below in current ribbon
+			show images shifted (all / above only / below only) in current ribbon
 			show marked only
 		multiple ribbons
 			show images above/below
diff --git a/ui/index.html b/ui/index.html
index a14beb8f..2311f3bb 100755
--- a/ui/index.html
+++ b/ui/index.html
@@ -80,6 +80,9 @@
 
 <script src="jquery.js"></script>
 
+<script src="lib/jli.js"></script>
+<script src="lib/keyboard.js"></script>
+
 <script>
 
 /*
@@ -195,6 +198,10 @@ function focusImage(image){
 }
 
 
+// Alignment API...
+function alignImage(){
+}
+
 
 
 // NOTE: this is on purpose done relative...
diff --git a/ui/lib/_template.js b/ui/lib/_template.js
new file mode 100755
index 00000000..41720809
--- /dev/null
+++ b/ui/lib/_template.js
@@ -0,0 +1,16 @@
+/**********************************************************************
+* 
+*
+*
+**********************************************************************/
+
+//var DEBUG = DEBUG != null ? DEBUG : true
+
+
+/*********************************************************************/
+
+
+
+
+/**********************************************************************
+* vim:set ts=4 sw=4 :                                                */
diff --git a/ui/lib/jli.js b/ui/lib/jli.js
new file mode 100755
index 00000000..8da08f3d
--- /dev/null
+++ b/ui/lib/jli.js
@@ -0,0 +1,571 @@
+/**********************************************************************
+* JavaScript Lib
+* at this point this is just a place I put most of the generic stuff I 
+* use.
+* 
+* P.S. the name "jli" just stands for Java script LIb, like how it 
+* looks...
+**********************************************************************/
+
+//var DEBUG = DEBUG != null ? DEBUG : true
+
+
+
+/*********************************************************************/
+
+// This will create a function that will cycle through a class_list on elem 
+// calling the optional callbacks before and/or after.
+// If class_list is given as a string, then this will create a toggler that 
+// will turn the given class on the element on and off.
+//
+// Elem is a jquery compatible object; default use-case: a css selector.
+//
+// This will return a function with the folowing signature:
+//
+// 	func() -> <state>
+// 	func(<action>) -> <state>
+// 	func(<target>, <action>) -> <state>
+//
+//
+// In the first form this just toggles the state.
+//
+// In forms 2 and 3, if class_list is a string, the <action> can be :
+// 	- <index>		: 0 for 'off' and 1 for 'on' (see below)
+// 	- 'on'			: switch mode on -- add class
+// 	- 'off'			: switch mode off -- remove class
+// 	- '?'			: return current state ('on'|'off')
+//
+// In forms 2 and 3, if class_list is a list of strings, the <action> can be:
+//  - <index>		: explicitly set the state to index in class_list
+//  - <class-name>	: explicitly set a class from the list
+// 	- '?'			: return current state ('on'|'off')
+// 
+// In the third form the <target> is a jquery-compatible object.
+//
+// In all forms this will return the current state string or null if the
+// action argument given is invalid.
+//
+// NOTE: there is a special action 'next', passing it will have the same
+// 		effect as not passing any action.
+// NOTE: if it is needed to apply this to an explicit target but with 
+// 		no explicit action, just pass 'next' as the second argument.
+// NOTE: a special class name 'none' means no class is set, if it is present 
+// 		in the class_list then that state will be with all other state 
+// 		classes removed.
+// NOTE: <class-name> must be an exact match to a string given in class_list
+// NOTE: of only one callback is given then it will be called after the 
+// 		class change...
+// 		a way around this is to pass an empty function as callback_b
+// NOTE: leading dots in class names in class_list are optional. 
+// 		this is due to several times I've repeated the same mistake of 
+// 		forgetting to write the classes without leading dots, this now 
+// 		will normalize the class list...
+//
+//
+// This also takes one or two callbacks. If only one is given then it is
+// called after (post) the change is made. If two are given then the first
+// is called before the change and the second after the change.
+// The callbacks are passed the current action.
+//
+// NOTE: the pre-callback will get the "intent" action, i.e. the state the
+// 		we are changing into but the changes are not yet made.
+// NOTE: if the pre-callback explicitly returns false, then the change will
+// 		not be made.
+function createCSSClassToggler(elem, class_list, callback_a, callback_b){
+	var bool_action = false
+	if(typeof(class_list) == typeof('')){
+		class_list = ['none', class_list]
+		bool_action = true
+	}
+	// Normalize classes -- remove the dot from class names...
+	// NOTE: this is here because I've made the error of including a 
+	// 		leading "." almost every time I use this after I forget 
+	// 		the UI...
+	class_list = $(class_list).map(function(_, e){
+		return $(e.split(' ')).map(function(_, c){
+			c = c.trim()
+			return c[0] == '.' ? c.slice(1) : c
+		}).toArray().join(' ')
+	}).toArray()
+	// normalize the callbacks...
+	if(callback_b == null){
+		var callback_pre = null
+		var callback_post = callback_a
+	} else {
+		var callback_pre = callback_a
+		var callback_post = callback_b
+	}
+
+	// XXX make this generic...
+	var func = function(a, b){
+		if(b == null){
+			var action = a == 'next' ? null : a
+			var e = elem
+		} else {
+			var e = a
+			var action = b == 'next' ? null : b
+		}
+		e = $(e)
+		// option number...
+		if(typeof(action) == typeof(1)){
+			// range check...
+			if(action < 0 || action >= class_list.length){
+				return null
+			}
+			if(bool_action){
+				action = action == 0 ? 'off' : 'on'
+			} else {
+				action = class_list[action]
+			}
+		}
+		// we need to get the current state...
+		if(action == null || action == '?'){
+			// get current state...
+			var cur = 'none'
+			for(var i=0; i < class_list.length; i++){
+				if(e.hasClass(class_list[i])){
+					cur = class_list[i]
+					break
+				}
+			} 
+			// just asking for info...
+			if(action == '?'){
+				return bool_action ? (cur == 'none' ? 'off' : 'on') : cur
+			}
+
+		// invalid action...
+		} else if((bool_action && ['on', 'off'].indexOf(action) == -1)
+				|| (!bool_action && class_list.indexOf(action) == -1)){
+			return null
+		}
+
+		var cls = bool_action ? class_list[1] : action
+		// get the right class...
+		if(action == null){
+			var i = class_list.indexOf(cur)+1
+			i = i == -1 ? 0 : i
+			i = i == class_list.length ? 0 : i
+			cls = class_list[i]
+
+			if(bool_action){
+				action = cls == 'none' ? 'off' : 'on'
+			} else {
+				action = cls
+			}
+		}
+
+		// pre callback...
+		if(callback_pre != null){
+			if(callback_pre(action) === false){
+				return
+			}
+		}
+		// update the element...
+		e.removeClass(class_list.join(' '))
+		if(cls != 'none' && action != 'off'){
+			e.addClass(cls)
+		}
+		// post callback...
+		if(callback_post != null){
+			callback_post(action)
+		}
+
+		return action
+	}
+
+	func.class_list = class_list
+	if(bool_action){
+		func.doc = 'With no arguments this will toggle between "on" and '+
+			'"off".\n'+
+			'If either "on" or "off" are given then this will switch '+
+			'to that mode.\n'+
+			'If "?" is given, this will return either "on" or "off" '+
+			'depending on the current state.'
+	}else{
+		func.doc = 'With no arguments this will toggle between '+
+			class_list +' in cycle.\n' + 
+			'if any of the state names or its number is given then that '+
+			'state is switched on.'+
+			'If "?" is given, this will return the current state.'
+	}
+
+	return func
+}
+
+
+
+/*
+// show a jQuary opject in viewer overlay...
+// XXX need to set .scrollTop(0) when showing different UI... 
+// 		...and not set it when the UI is the same
+// XXX this must create it's own overlay...
+function showInOverlay(obj){
+	obj.click(function(){ return false })
+	// XXX 
+	$('.viewer').addClass('overlay-mode')
+	// clean things up...
+	$('.overlay .content').children().remove()
+	// put it in the overlay...
+	$('.overlay .content').append(obj)
+	// prepare the overlay...
+	$('.overlay')
+		.one('click', function(){
+			$('.overlay')
+				.fadeOut(function(){
+					$('.overlay .content')
+						.children()
+							.remove()
+					$('.overlay-mode').removeClass('overlay-mode')
+				})
+		})
+		.fadeIn()
+	return obj
+}
+
+
+
+function overlayMessage(text){
+	return showInOverlay($('<div class="overlay-message">' +text+ '</div>'))
+}
+*/
+
+
+
+function unanimated(obj, func, time){
+	return function(){
+		if(time == null){
+			time = 5
+		}	
+		obj = $(obj)
+		obj.addClass('unanimated')
+		var res = func.apply(func, arguments)
+		setTimeout(function(){obj.removeClass('unanimated')}, time)
+		return res
+	}
+}
+
+
+// NOTE: this will only use the first element in a set.
+// NOTE: if no element is given this will return null.
+function makeCSSVendorAttrGetter(attr, dfl, callback){
+	return function(elem){
+		elem = $(elem)
+		if(elem.length == 0){
+			return null
+		}
+		// using the attr...
+		var vendors = ['O', 'Moz', 'ms', 'webkit']
+		var data = elem[0].style[attr]
+
+		// go through vendor prefixes... (hate this!)
+		if(!data || data == 'none'){
+			for(var i in vendors){
+				data = elem[0].style[vendors[i] + attr.capitalize()]
+				if(data && data != 'none'){
+					break
+				}
+			}
+		}
+		// no data is set...
+		if(!data || data == 'none'){
+			return dfl
+		}
+		return callback(data)
+	}
+}
+
+
+// Return a scale value for the given element(s).
+// NOTE: this will only return a single scale value...
+var getElementScale = makeCSSVendorAttrGetter(
+		'transform',
+		1,
+		function(data){
+			return parseFloat((/(scale|matrix)\(([^),]*)\)/).exec(data)[2])
+		})
+
+var getElementShift = makeCSSVendorAttrGetter(
+		'transform',
+		{left: 0, top: 0},
+		function(data){
+			res = /(translate\(|matrix\([^,]*,[^,]*,[^,]*,[^,]*,)([^,]*),([^\)]*)\)/.exec(data)
+			return {
+				left: parseFloat(res[2]),
+				top: parseFloat(res[3])
+			}
+		})
+
+
+var DEFAULT_TRANSITION_DURATION = 200
+
+var getElementTransitionDuration = makeCSSVendorAttrGetter(
+		'transitionDuration', 
+		DEFAULT_TRANSITION_DURATION, 
+		parseInt)
+
+
+
+var USE_3D_TRANSFORM = true
+
+// NOTE: at this point this works only on the X axis...
+function setElementTransform(elem, offset, scale, duration){
+	elem = $(elem)
+	var t3d = USE_3D_TRANSFORM ? 'translateZ(0px)' : ''
+
+	if(offset == null){
+		offset = getElementShift(elem)
+	// number -- only the x coord...
+	} else if(typeof(offset) == typeof(1)){
+		offset = {
+			left: offset,
+			top: 0
+		}
+	// array...
+	} else if(offset.indexOf){
+		offset = {
+			left: offset[0] ? offset[0] : 0,
+			top: offset[1] ? offset[1] : 0
+		}
+	}
+	if(scale == null){
+		var scale = getElementScale(elem)
+	}
+	if(USE_TRANSFORM){
+		var transform = 'translate('+ 
+				Math.round(offset.left) +'px, '+
+				Math.round(offset.top) +'px) scale('+ scale +') ' + t3d
+		elem.css({
+			'-ms-transform' : transform, 
+			'-webkit-transform' : transform, 
+			'-moz-transform' : transform, 
+			'-o-transform' : transform, 
+			'transform' : transform, 
+
+			// XXX can we avoid this here?? 
+			left: 0,
+			// XXX is this correct???
+			top: ''
+		}, duration)
+	} else {
+		var transform = 'translate(0px, 0px) scale('+ scale +') ' + t3d
+		elem.css({
+			// NOTE: this will be wrong during a transition, that's why we 
+			// 		can pass the pre-calculated offset as an argument...
+			left: Math.round(offset.left),
+			top: Math.round(offset.top),
+
+			// XXX can we avoid this here?? 
+			'-ms-transform' : transform, 
+			'-webkit-transform' : transform, 
+			'-moz-transform' : transform, 
+			'-o-transform' : transform, 
+			'transform' : transform, 
+		}, duration)
+	}
+	return elem
+}
+
+
+// XXX this affects only the innertial part, not setCurrentPage...
+var USE_TRANSITIONS_FOR_ANIMATION = false
+
+// XXX make this a drop-in replacement for setElementTransform...
+// XXX cleanup, still flacky...
+function animateElementTo(elem, to, duration, easing, speed, use_transitions){
+	// stop all ongoing animations on the current elem...
+	stopAnimation(elem)
+	use_transitions = use_transitions != null ? 
+							use_transitions 
+							: USE_TRANSITIONS_FOR_ANIMATION
+	// use transition for animation...
+	if(use_transitions){
+		setTransitionEasing(elem, easing)
+		duration == null && setTransitionDuration(elem, duration)
+		setElementTransform(elem, to)
+
+	// manually animate...
+	} else {
+		if(typeof(to) == typeof(1)){
+			to = {
+				left: to,
+				top: 0,
+			}
+		}
+		if(typeof(speed) == typeof(2)){
+			speed = {
+				x: speed,
+				y: 0,
+			}
+		}
+		if(duration == null){
+			duration = getElementTransitionDuration(elem)
+		}
+
+		setTransitionDuration(elem, 0)
+
+		var start = Date.now()
+		var then = start + duration
+		var from = getElementShift(elem)
+		var cur = {
+			top: from.top,
+			left: from.left
+		}
+		var dist = {
+			top: to.top - from.top,
+			left: to.left - from.left,
+		}
+		elem.animating = true
+
+		function animate(){
+			var t = Date.now()
+			// end of the animation...
+			if(t >= then){
+				setElementTransform(elem, to)
+				return
+			}
+			if(!elem.animating){
+				// XXX jittery...
+				setElementTransform(elem, cur)
+				return
+			}
+
+			// do an intermediate step...
+			// XXX do propper easing...
+			// XXX sometimes results in jumping around...
+			// 		...result of jumping over the to position...
+			if(speed != null){
+
+				// XXX the folowing two blocks are the same...
+				// XXX looks a bit too complex, revise...
+				if(Math.abs(dist.top) >= 1){
+					dy = ((t - start) * speed.y)
+					if(Math.abs(dist.top) > Math.abs(dy)){
+						dist.top -= dy
+						cur.top = Math.round(cur.top + dy)
+						// normalize...
+						cur.top = Math.abs(dist.top) <= 1 ? to.top : cur.top
+						// calc speed for next step...
+						speed.y = dist.top / (duration - (t - start))
+					} else {
+						cur.top = to.top
+					}
+				}
+
+				// XXX looks a bit too complex, revise...
+				if(Math.abs(dist.left) >= 1){
+					dx = ((t - start) * speed.x)
+					if(Math.abs(dist.left) > Math.abs(dx)){
+						dist.left -= dx
+						cur.left = Math.round(cur.left + dx)
+						// normalize...
+						cur.left = Math.abs(dist.left) <= 1 ? to.left : cur.left
+						// calc speed for next step...
+						speed.x = dist.left / (duration - (t - start))
+					} else {
+						cur.left = to.left
+					}
+				}
+
+			// XXX this is a staright forward linear function...
+			} else {
+				var r = (t - start) / duration
+				cur.top = Math.round(from.top + (dist.top * r))
+				cur.left = Math.round(from.left + (dist.left * r)) 
+			}
+			setElementTransform(elem, cur)
+			// sched next frame...
+			elem.next_frame = getAnimationFrame(animate)
+		}
+
+		animate()
+	}
+}
+
+function stopAnimation(elem){
+	if(elem.next_frame){
+		cancelAnimationFrame(elem.next_frame)
+	}
+}
+
+
+// XXX account for other transitions...
+function setElementScale(elem, scale){
+	return setElementTransform(elem, null, scale)
+}
+
+function setTransitionEasing(elem, ease){
+	if(typeof(ms) == typeof(0)){
+		ms = ms + 'ms'
+	}
+	return elem.css({
+		'transition-timing-function': ease, 
+		'-moz-transition-timing-function': ease,
+		'-o-transition-timing-function': ease,
+		'-ms-transition-timing-function': ease,
+		'-webkit-transition-timing-function': ease
+	})
+}
+
+function setTransitionDuration(elem, ms){
+	if(typeof(ms) == typeof(0)){
+		ms = ms + 'ms'
+	}
+	return elem.css({
+		'transition-duration': ms, 
+		'-moz-transition-duration': ms,
+		'-o-transition-duration': ms,
+		'-ms-transition-duration': ms,
+		'-webkit-transition-duration': ms
+	})
+}
+
+
+
+
+/************************************************ jQuery extensions **/
+
+jQuery.fn.reverseChildren = function(){
+	return $(this).each(function(_, e){
+		return $(e).append($(e).children().detach().get().reverse())
+	})
+}
+
+
+
+jQuery.fn.sortChildren = function(func){
+	return $(this).each(function(_, e){
+		return $(e).append($(e).children().detach().get().sort(func))
+	})
+}
+
+
+
+/**************************************************** JS utilities ***/
+
+String.prototype.capitalize = function(){
+	return this[0].toUpperCase() + this.slice(1)
+}
+
+
+var getAnimationFrame = (window.requestAnimationFrame
+		|| window.webkitRequestAnimationFrame 
+		|| window.mozRequestAnimationFrame
+		|| window.oRequestAnimationFrame
+		|| window.msRequestAnimationFrame
+		|| function(callback){ 
+			setTimeout(callback, 1000/60) 
+		})
+
+var cancelAnimationFrame = (window.cancelRequestAnimationFrame 
+		|| window.webkitCancelAnimationFrame 
+		|| window.webkitCancelRequestAnimationFrame 
+		|| window.mozCancelRequestAnimationFrame
+		|| window.oCancelRequestAnimationFrame
+		|| window.msCancelRequestAnimationFrame
+		|| clearTimeout)
+
+
+
+
+/**********************************************************************
+* vim:set ts=4 sw=4 :                                                */
diff --git a/ui/lib/keyboard.js b/ui/lib/keyboard.js
new file mode 100755
index 00000000..13cede69
--- /dev/null
+++ b/ui/lib/keyboard.js
@@ -0,0 +1,326 @@
+/**********************************************************************
+* 
+*
+*
+**********************************************************************/
+
+//var DEBUG = DEBUG != null ? DEBUG : true
+
+
+
+/*********************************************************************/
+
+// Neither _SPECIAL_KEYS nor _KEY_CODES are meant for direct access, use
+// toKeyName(<code>) and toKeyCode(<name>) for a more uniform access.
+//
+// NOTE: these are un-shifted ASCII key names rather than actual key 
+// 		code translations.
+// NOTE: ASCII letters (capital) are not present because they actually 
+// 		match their key codes and are accessible via:
+// 			String.fromCharCode(<code>) or <letter>.charCodeAt(0)
+// NOTE: the lower case letters are accessible by adding 32 to the 
+// 		capital key code.
+// NOTE: don't understand why am I the one who has to write this...
+var _SPECIAL_KEYS = {
+	// Special Keys...
+	9:		'Tab',		33:		'PgUp',		45:		'Ins',		
+	13:		'Enter',	34:		'PgDown',	46:		'Del',		
+	16:		'Shift',	35:		'End',		80:		'Backspace',
+	17:		'Ctrl',		36:		'Home',		91:		'Win',		
+	18:		'Alt',		37:		'Left',		93:		'Menu',		
+	20:		'Caps Lock',38:		'Up',	 
+	27:		'Esc',		39:		'Right',  
+	32:		'Space',	40:		'Down',  
+
+	// Function Keys...
+	112:	'F1',		116:	'F5',		120:	'F9', 
+	113:	'F2',		117:	'F6',		121:	'F10',
+	114:	'F3',		118:	'F7',		122:	'F11',
+	115:	'F4',		119:	'F8',		123:	'F12',
+
+	// Number row..
+	49: '1',	50: '2',	51: '3',	52: '4',	53: '5',
+	54: '6', 	55: '7',	56: '8',	57: '9',	48: '0',
+
+	// Punctuation...
+	// top row...
+	192: '`',		/* Numbers */		189: '-',	187: '=',
+	// right side of keyboard...
+				219: '[',	221: ']',	220: '\\',
+				186: ';',	222: '\'',
+	188: ',',	190: '.',	191: '/',
+}
+
+var _KEY_CODES = {}
+for(var k in _SPECIAL_KEYS){
+	_KEY_CODES[_SPECIAL_KEYS[k]] = k
+}
+
+
+// XXX some keys look really wrong...
+function toKeyName(code){
+	// check for special keys...
+	var k = _SPECIAL_KEYS[code]
+	if(k != null){
+		return k
+	}
+	// chars...
+	k = String.fromCharCode(code)
+	if(k != ''){
+		//return k.toLowerCase()
+		return k
+	}
+	return null
+}
+
+function toKeyCode(c){
+	if(c in _KEY_CODES){
+		return _KEY_CODES[c]
+	}
+	return c.charCodeAt(0)
+}
+
+
+// if set to false the event handlers will always return false...
+var KEYBOARD_HANDLER_PROPAGATE = true
+
+/* Basic key binding format:
+ *
+ * {
+ * 		<css-selector>: {
+ *			// meta-data used to generate user docs/help/config
+ * 			title: <text>,
+ * 			doc: <text>,
+ *
+ *			// this defines the list of keys to ignore by the handler.
+ *			// NOTE: use "*" to ignore all keys other than explicitly 
+ *			// 		defined in the current section.
+ * 			ignore: <ignored-keys>
+ *
+ * 			<key-def> : <callback>,
+ *
+ * 			<key-def> : {
+ * 				'default': <callback>,
+ *				// a modifier can be any single modifier, like shift or a 
+ *				// combination of modifers like 'ctrl+shift', given in order 
+ *				// of priority.
+ *				// supported modifiers are (in order of priority):
+ *				//	- ctrl
+ *				//	- alt
+ *				//	- shift
+ * 				<modifer>: [...],
+ * 				...
+ * 			},
+ *
+ * 			<key-def> : [
+ *				// this can be any type of handler except for an alias...
+ * 				<handler>, 
+ * 				<doc>
+ * 			],
+ *
+ *			// alias...
+ * 			<key-def-a> : <key-def-b>,
+ *
+ *			...
+ * 		},
+ *
+ * 		...
+ * }
+ *
+ *
+ * <key-def> can be:
+ * 	- explicit key code, e.g. 65
+ * 	- key name, if present in _SPECIAL_KEYS, e.g. Enter
+ * 	- key char (uppercase), as is returned by String.fromCharCode(...) e.g. A
+ *
+ *
+ * NOTE: to rest what to use as <key-def> use toKeyCode(..) / toKeyName(..).
+ * NOTE: all fields are optional.
+ * NOTE: if a handler explicitly returns false then that will break the 
+ * 		event propagation chain and exit the handler.
+ * 		i.e. no other matching handlers will be called.
+ * NOTE: a <css-selector> is used as a predicate to select a section to 
+ * 		use. if multiple selectors match something then multiple sections 
+ * 		will be resolved in order of occurrence.
+ *
+ * XXX might need to add meta information to generate sensible help...
+ */
+function makeKeyboardHandler(keybindings, unhandled){
+	if(unhandled == null){
+		//unhandled = function(){return false}
+		unhandled = function(){return KEYBOARD_HANDLER_PROPAGATE}
+	}
+	return function(evt){
+		var did_handling = false
+		var res = null
+		for(var mode in keybindings){
+			if($(mode).length > 0){
+				var bindings = keybindings[mode]
+
+				var key = evt.keyCode
+				var chr = toKeyName(evt.keyCode)
+				// normalize the modifiers...
+				var modifers = evt.ctrlKey ? 'ctrl' : ''
+				modifers += evt.altKey ? (modifers != '' ? '+alt' : 'alt') : ''
+				modifers += evt.shiftKey ? (modifers != '' ? '+shift' : 'shift') : ''
+
+				if(chr in bindings){
+					var handler = bindings[chr]
+				} else {
+					var handler = bindings[key]
+				}
+
+				// alias...
+				while (typeof(handler) == typeof(123) || typeof(handler) == typeof('str')) {
+					if(handler in bindings){
+						// XXX need to take care of that we can always be a number or a string...
+						handler = bindings[handler]
+					} else if(typeof(h) == typeof(1)) {
+						handler = bindings[toKeyName(handler)]
+					} else {
+						handler = bindings[toKeyCode(handler)]
+					}
+				}
+				// no handler...
+				if(handler == null){
+					// if something is ignored then just breakout and stop handling...
+					if(bindings.ignore == '*' 
+							|| bindings.ignore != null && bindings.ignore.indexOf(key) != -1){
+						res = res == null ? true : res
+						did_handling = true
+						// ignoring a key will stop processing it...
+						break
+					}
+					continue
+				}
+				// Array, lisp style with docs...
+				// XXX for some odd reason typeof([]) == typeof({})!!!
+				if(typeof(handler) == typeof([]) && handler.constructor.name == 'Array'){
+					// we do not care about docs here, so just get the handler...
+					handler = handler[0]
+				}
+				// complex handler...
+				if(typeof(handler) == typeof({})){
+					var callback = handler[modifers]
+					if(callback == null){
+						callback = handler['default']
+					}
+					if(callback != null){
+						res = callback()
+						did_handling = true
+						continue
+					}
+				} else {
+					// simple callback...
+					//res = handler(evt) 
+					res = handler() 
+					// if the handler explicitly returned false break out...
+					if(res === false){
+						// XXX is this corrent???
+						// XXX should we just break here instead of return...
+						return KEYBOARD_HANDLER_PROPAGATE ? res : null
+					}
+					did_handling = true
+					continue
+				}
+			}
+		}
+		if(!did_handling){
+			// key is unhandled by any modes...
+			return unhandled(key)
+		} else {
+			// XXX should we handle multiple hits???
+			return KEYBOARD_HANDLER_PROPAGATE&&res?true:false
+		}
+	}
+}
+
+
+// helper...
+function doc(text, func){
+	func.doc = text
+	return func
+}
+
+/* Build structure ready for conversion to HTML help.
+* Structure:
+* 	{
+* 		<section-title>: {
+* 			doc: ...
+*
+* 			<handler-doc>: <keys-spec>
+* 			...
+* 		}
+* 	}
+*
+* 	<keys-spec> 	- list of key names.
+*
+*/
+function getKeyHandler(key, keybindings){
+}
+
+
+
+function buildKeyindingsHelp(keybindings){
+	var res = {}
+
+	for(var selector in keybindings){
+		var section = keybindings[selector]
+		var title = section.title == null ? selector : section.title
+		var res_sec = {
+			doc: section.doc,
+		}
+		res.title = res_sec
+
+		for(var k in section){
+			// handler...
+			var h = section[k]
+			var doc
+			var key = typeof(k) == typeof(1) ? toKeyName(k) : k
+
+			// an alias...
+			while(typeof(h) == typeof(1) || typeof(h) == typeof('s')){
+				if(h in section){
+					// XXX need to take care of that we can always be a number or a string...
+					h = section[h]
+				} else if(typeof(h) == typeof(1)) {
+					h = section[toKeyName(h)]
+				} else {
+					h = section[toKeyCode(h)]
+				}
+			}
+
+			// no handler... 
+			if(h == null){
+				doc = 'Nothing'				
+
+			// a handler with doc (array)...
+			} else if(typeof(h) == typeof([]) && handler.constructor.name == 'Array'){
+				doc = h[1]
+
+			// complex handler (object)...
+			} else if(typeof(h) == typeof({})){
+				// XXX
+				
+
+			// simple handler (function)...
+			} else {
+				doc = h.doc != null ? h.doc : h
+
+			}
+
+			// push the actual data...
+			if(doc in res_sec){
+				res_sec[doc].push(key)
+			} else {
+				res_sec[doc] = [key]
+			}
+		}
+	}
+	return res
+}
+
+
+
+/**********************************************************************
+* vim:set ts=4 sw=4 :                                                */
diff --git a/ui/lib/scroller.js b/ui/lib/scroller.js
new file mode 100755
index 00000000..371b49e2
--- /dev/null
+++ b/ui/lib/scroller.js
@@ -0,0 +1,513 @@
+/**********************************************************************
+* 
+* General Swipe/Scroll handler lib 
+*
+*
+**********************************************************************/
+
+//var DEBUG = DEBUG != null ? DEBUG : true
+
+// click threshold in pixels, if the distance between start and end is 
+// less than this, the whole event is considered a click and not a 
+// drag/swipe...
+var CLICK_THRESHOLD = 10
+
+// if the amount of time to wait bteween start and end is greater than
+// this the event is considered a long click.
+// NOTE: this will not auto-fire the event, the user MUST release first.
+var LONG_CLICK_THRESHOLD = 400
+
+// the maximum amount of time between clicks to count them together.
+// NOTE: if multi-clicks are disabled this has no effect.
+// NOTE: this is reset by the timeout explicitly set in the handler...
+// NOTE: this is the timeout between two consecutive clicks and not the 
+// 		total.
+// NOTE: if multiple clicks are enabled this will introduce a lag after
+// 		each click (while we wait for the next), so keep this as small 
+// 		as possible, but not too small as to rush the user too much.
+var MULTI_CLICK_TIMEOUT = 200
+
+// the amount of time between finger releases.
+// NOTE: when this is passed all the fingers released before are ignored.
+var MULTITOUCH_RELEASE_THRESHOLD = 100
+
+
+
+/*********************************************************************/
+
+// Scroll handler
+//
+// This will take two elements a root (container) and a scrolled (first
+// child of the container) and implement drag-scrolling of the scrolled
+// within the root.
+//
+// This calls the following callbacks if they are defined.
+// 	- preCallback (unset)
+// 	- scrollCallback (unset)
+// 	- postCallback (set to postScrollCallback)
+//
+// See scroller.options for configuration.
+//
+//
+// XXX add a resonable cancel scheme...
+// 		... something similar to touch threshold but bigger...
+// XXX setup basic styles for the contained element...
+// XXX revise...
+// XXX test on other devices...
+function makeScrollHandler(root, config){
+	root = $(root)
+
+	// local data...
+	var ignoring = false
+	// XXX this and scroller.state are redundent...
+	var scrolling = false
+	var touch = false
+	var touches = 0
+	var max_dx = 0
+	var max_dy = 0
+
+	var cancelThreshold, scrolled
+		// initial state...
+		, start_x, start_y, start_t
+		// previous state...
+		, prev_x, prev_y, prev_t
+		// current state...
+		, x, y, t
+		// state delta...
+		, dx, dy, dt
+
+		, shift
+		, scale
+		//, bounds
+
+	function startMoveHandler(evt){
+		var options = scroller.options
+		// ignore...
+		if(options.ignoreElements 
+				&& $(evt.target).closest(options.ignoreElements).length > 0
+				|| scroller.state == 'paused'){
+			ignoring = true
+			return
+		} else {
+			ignoring = false
+		}
+		if(event.touches != null){
+			touch = true
+		}
+		cancelThreshold = options.scrollCancelThreshold
+		touches = touch ? event.touches.length : 1
+		// if we are already touching then just skip on this...
+		// XXX test this...
+		if(touches > 1){
+			return false
+		}
+		prev_t = event.timeStamp || Date.now();
+		start_t = prev_t
+		/*
+		if(options.autoCancelEvents){
+			bounds = {
+				left: options.eventBounds,
+				right: root.width() - options.eventBounds,
+				top: options.eventBounds,
+				bottom: root.height() - options.eventBounds 
+			}
+		}
+		*/
+		scrolled = $(root.children()[0])
+		setTransitionDuration(scrolled, 0)
+		// XXX these two are redundant...
+		scrolling = true
+		scroller.state = 'scrolling'
+		// XXX do we need to pass something to this?
+		options.preCallback && options.preCallback()
+
+		shift = getElementShift(scrolled)
+		scale = getElementScale(scrolled)
+		// get the user coords...
+		prev_x = touch ? event.touches[0].pageX : evt.clientX
+		start_x = prev_x
+		prev_y = touch ? event.touches[0].pageY : evt.clientY
+		start_y = prev_y
+
+		return false
+	}
+
+	// XXX try and make this adaptive to stay ahead of the lags...
+	// NOTE: this does not support limiting the scroll, might be done in
+	// 		the future though.
+	// 		The way to go about this is to track scrolled size in the 
+	// 		callback...
+	function moveHandler(evt){
+		if(ignoring){
+			return
+		}
+		var options = scroller.options
+		evt.preventDefault()
+		t = event.timeStamp || Date.now();
+		// get the user coords...
+		x = touch ? event.touches[0].pageX : evt.clientX
+		y = touch ? event.touches[0].pageY : evt.clientY
+		touches = touch ? event.touches.length : 1
+
+		/*
+		// XXX needs testing...
+		// XXX do we need to account for scrollDisabled here???
+		// check scroll bounds...
+		if(bounds != null){
+			if(options.hScroll && (x <= bounds.left || x >= bounds.right)
+					|| options.vScroll && (y <= bounds.top || y >= bounds.bottom)){
+				// XXX cancel the touch event and trigger the end handler...
+				return endMoveHandler(evt)
+			}
+		}
+		*/
+
+		// do the actual scroll...
+		if(!options.scrollDisabled && scrolling){
+			if(options.hScroll){
+				shift.left += x - prev_x
+			}
+			if(options.vScroll){
+				shift.top += y - prev_y
+			}
+			setElementTransform(scrolled, shift, scale)
+
+			// XXX these should be done every time the event is caught or 
+			// 		just while scrolling?
+			dx = x - prev_x
+			dy = y - prev_y
+			max_dx += Math.abs(dx)
+			max_dy += Math.abs(dy)
+			dt = t - prev_t
+			prev_x = x
+			prev_y = y
+			prev_t = t
+
+			// XXX do we need to pass something to this?
+			options.scrollCallback && options.scrollCallback()
+		}
+		return false
+	}
+
+	function endMoveHandler(evt){
+		t = event.timeStamp || Date.now();
+		touches = touch ? event.touches.length : 0
+		if(ignoring){
+			if(touches == 0){
+				ignoring = false
+			}
+			return
+		}
+		var options = scroller.options
+
+		// XXX get real transition duration...
+		scroller.resetTransitions()
+
+		x = touch ? event.changedTouches[0].pageX : evt.clientX
+		y = touch ? event.changedTouches[0].pageY : evt.clientY
+		// check if we are canceling...
+		if(cancelThreshold 
+				&& Math.abs(start_x-x) < cancelThreshold 
+				&& Math.abs(start_y-y) < cancelThreshold
+				&& (max_dx > cancelThreshold 
+					|| max_dy > cancelThreshold)){
+			scroller.state = 'canceling'
+		}
+
+		var data = {
+			orig_event: evt, 
+			scroller: scroller, 
+			speed: {
+				x: dx/dt,
+				y: dy/dt
+			},
+			distance: {
+				x: start_x-x,
+				y: start_y-y
+			},
+			duration: t-start_t, 
+			// current touches...
+			touches: touches,
+			clicks: null,
+		}
+		// XXX stop only if no fingers are touching or let the callback decide...
+		if(options.postCallback 
+				// XXX revise this....
+				&& options.postCallback(data) === false 
+				|| touches == 0){
+			// cleanup and stop...
+			touch = false
+			scrolling = false
+			scroller.state = 'waiting'
+			scrolled = null 
+			//bounds = null
+			max_dx = 0
+			max_dy = 0
+		}
+
+		return false
+	}
+
+
+	var scroller = {
+		options: {
+			// if one of these is false, it will restrict scrolling in 
+			// that direction. hScroll for horizontal and vScroll for 
+			// vertical.
+			// NOTE: to disable scroll completely use scrollDisabled, see
+			// 		below for details.
+			hScroll: true,
+			vScroll: true,
+
+			// this will disable scroll.
+			// NOTE: this is the same as setting both vScroll and hScroll 
+			// 		to false, but can be set and reset without affecting 
+			// 		the actual settings individually...
+			// NOTE: this takes priority over hScroll/vScroll.
+			scrollDisabled: false,
+
+			// sets the default transition settings while not scrolling...
+			transitionDuration: 200,
+			transitionEasing: 'ease',
+
+			// items to be ignored by the scroller...
+			// this is a jQuery compatible selector.
+			ignoreElements: '.noScroll',
+			// this is the side of the rectangle in px, if the user moves
+			// out of it, and then returns back, the action will get cancelled.
+			// i.e. the callback will get called with the "cancelling" state.
+			scrollCancelThreshold: 100,
+
+			/*
+			// XXX padding within the target element moving out of which 
+			// 		will cancell the action...
+			// XXX needs testing...
+			autoCancelEvents: false,
+			eventBounds: 5,
+			*/
+
+			// callback to be called when the user first touches the screen...
+			preCallback: null,
+			// callback to be called when a scroll step is done...
+			scrollCallback: null,
+			// callback to be called when the user lifts a finger/mouse.
+			// NOTE: this may happen before the scroll is done, for instance
+			// 		when one of several fingers participating in the action
+			// 		gets lifted.
+			// NOTE: if this returns false explicitly, this will stop scrolling.
+			postCallback: postScrollCallback,
+
+			// These are used by the default callback...
+			//
+			// if true then doubleClick and multiClick events will get 
+			// triggered.
+			// NOTE: this will introduce a lag needed to wait for next 
+			// 		clicks in a group.
+			// NOTE: when this is false, shortClick is triggered for every 
+			// 		single click separately.
+			enableMultiClicks: false,
+			// NOTE: if these are null, respective values from the env will
+			// 		be used.
+			clickThreshold: null,
+			longClickThreshold: null,
+			multiClickTimeout: null,
+			multitouchTimeout: null,
+		},
+		state: 'stopped',
+		root: root,
+
+		start: function(){
+			if(this.state == 'paused'){
+				this.state = 'waiting'
+			} else {
+				this.state = 'waiting'
+
+				// NOTE: if we bind both touch and mouse events, on touch devices they 
+				//		might start interfering with each other...
+				if('ontouchmove' in window){
+					root
+						.on('touchstart', startMoveHandler)
+						.on('touchmove', moveHandler) 
+						.on('touchend', endMoveHandler)
+						.on('touchcancel', endMoveHandler)
+				} else {
+					root
+						.on('mousedown', startMoveHandler) 
+						.on('mousemove', moveHandler) 
+						.on('mouseup', endMoveHandler) 
+				}
+			}
+			return this
+		},
+		// XXX test...
+		pause: function(){
+			this.state = 'paused'
+			return this
+		},
+		stop: function(){
+			if('ontouchmove' in window){
+				root
+					.off('touchstart', startMoveHandler)
+					.off('touchmove', moveHandler) 
+					.off('touchend', endMoveHandler)
+					.off('touchcancel', endMoveHandler)
+			} else {
+				root
+					.off('mousedown', startMoveHandler) 
+					.off('mousemove', moveHandler) 
+					.off('mouseup', endMoveHandler) 
+			}
+			this.state = 'stopped'
+			return this
+		},
+		resetTransitions: function(){
+			var scrolled = this.root.children().first()
+			setTransitionDuration(scrolled, this.options.transitionDuration)
+			setTransitionEasing(scrolled, this.options.transitionEasing)
+		}
+	}
+
+	// merge the config with the defaults...
+	if(config != null){
+		$.extend(scroller.options, config)
+	}
+
+	return scroller
+}
+
+
+
+// default callback...
+//
+// This will provide support for the following events on the scroll root
+// element:
+// 		- scrollCancelled
+//
+// 		- shortClick
+// 		- doubleClick
+// 		- multiClick
+// 			this will store the number of clicks in data.clicks
+// 		- longClick
+//
+// 		- swipeLeft
+// 		- swipeRight
+// 		- swipeUp
+// 		- swipeDown
+//
+// 		- screenReleased
+//
+// NOTE: data.touches passed to the event is the number of touches 
+// 		released within the multitouchTimeout.
+// 		this differs from what postScrollCallback actually gets in the 
+// 		same field when it receives the scroll data object.
+// XXX add generic snap
+// XXX add generic inertial scroll 
+// 		...see jli.js/animateElementTo for a rough implementation
+// XXX test multiple touches...
+function postScrollCallback(data){
+	var scroller = data.scroller
+	var options = scroller.options
+	var root = scroller.root
+	var clickThreshold = options.clickThreshold || CLICK_THRESHOLD
+	var longClickThreshold = options.longClickThreshold || LONG_CLICK_THRESHOLD
+	var multitouchTimeout = options.multitouchTimeout || MULTITOUCH_RELEASE_THRESHOLD
+	var enableMultiClicks = options.enableMultiClicks
+	var multiClickTimeout = options.multiClickTimeout || MULTI_CLICK_TIMEOUT
+
+	var now = Date.now();
+
+	// cancel event...
+	if(scroller.state == 'canceling'){
+		return root.trigger('scrollCancelled', data)
+	}
+
+	// handle multiple touches...
+	if(data.touches > 0){
+		var then = scroller._last_touch_release
+		if(then == null || now - then < multitouchTimeout){
+			if(scroller._touches == null){
+				scroller._touches = 1
+			} else {
+				scroller._touches += 1
+			}
+		} else {
+			scroller._touches = null
+		}
+		// wait for the next touch release...
+		scroller._last_touch_release = now
+		return
+
+	// calculate how many touches did participate... 
+	} else {
+		data.touches = scroller._touches ? scroller._touches + 1 : 1
+		scroller._last_touch_release = null
+		scroller._touches = null
+	}
+
+	// clicks, double-clicks, multi-clicks and long-clicks...
+	if(Math.max(
+			Math.abs(data.distance.x), 
+			Math.abs(data.distance.y)) < clickThreshold){
+		if(data.duration > longClickThreshold){
+			return root.trigger('longClick', data) 
+		}
+		if(!enableMultiClicks){
+			return root.trigger('shortClick', data)
+
+		} else {
+			// count the clicks so far...
+			if(scroller._clicks == null){
+				scroller._clicks = 1
+			} else {
+				scroller._clicks += 1
+			}
+
+			// kill any previous waits...
+			if(scroller._click_timeout_id != null){
+				clearTimeout(scroller._click_timeout_id)
+			}
+
+			// wait for the next click...
+			scroller._click_timeout_id = setTimeout(function(){
+				var clicks = scroller._clicks
+				data.clicks = clicks
+				if(clicks == 1){
+					root.trigger('shortClick', data)
+				} else if(clicks == 2){
+					root.trigger('doubleClick', data)
+				} else {
+					root.trigger('multiClick', data)
+				}					
+				scroller._clicks = null
+				scroller._click_timeout_id = null
+			}, multiClickTimeout)
+
+			return
+		}
+	}
+
+	// swipes...
+	// XXX might be a good idea to chain these with swipe and screenReleased
+	if(Math.abs(data.distance.x) > Math.abs(data.distance.y)){
+		if(data.distance.x <= -clickThreshold && root.data('events').swipeLeft){
+			return root.trigger('swipeLeft', data)
+		} else if(data.distance.x >= clickThreshold && root.data('events').swipeRight){
+			return root.trigger('swipeRight', data)
+		}
+	} else {
+		if(data.distance.y <= -clickThreshold && root.data('events').swipeUp){
+			return root.trigger('swipeUp', data)
+		} else if(data.distance.y >= clickThreshold && root.data('events').swipeDown){
+			return root.trigger('swipeDown', data)
+		}
+	}
+
+	// this is triggered if no swipes were handled...
+	return root.trigger('screenReleased', data)
+} 
+
+
+
+
+/**********************************************************************
+* vim:set ts=4 sw=4 :                                                */