mirror of
https://github.com/flynx/ImageGrid.git
synced 2025-10-30 10:50:08 +00:00
427 lines
13 KiB
JavaScript
Executable File
427 lines
13 KiB
JavaScript
Executable File
/**********************************************************************
|
|
*
|
|
*
|
|
*
|
|
**********************************************************************/
|
|
((typeof define)[0]=='u'?function(f){module.exports=f(require)}:define)
|
|
(function(require){ var module={} // make module AMD/node compatible...
|
|
/*********************************************************************/
|
|
|
|
|
|
|
|
/*********************************************************************/
|
|
|
|
// 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
|
|
// - 'next' : switch to next state (default)
|
|
// - 'prev' : switch to previous state
|
|
// - '!' : reload current state, same as toggler(toggler('?'))
|
|
// - '?' : return current state ('on'|'off')
|
|
// - '??' : return a list of supported states
|
|
//
|
|
// 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
|
|
// - 'next' : switch to next state (default)
|
|
// - 'prev' : switch to previous state
|
|
// - '!' : reload current state, same as toggler(toggler('?'))
|
|
// - '?' : return current state ('on'|'off')
|
|
// - '??' : return a list of supported states
|
|
//
|
|
//
|
|
// 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: action '?' is handled internally and not passed to the callbacks.
|
|
// 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, the class
|
|
// list is not normalized...
|
|
// NOTE: the toggler can be passed a non-jquery object, but then only an
|
|
// explicit state is supported as the second argument, the reason
|
|
// being that we can not determine the current state without a proper
|
|
// .hasClass(..) test...
|
|
//
|
|
//
|
|
// 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 two arguments:
|
|
// - <action> : the state we are going in
|
|
// - <target> : the target element or the element passed to the
|
|
// toggler
|
|
//
|
|
//
|
|
// The callback function will have 'this' set to the same value as the
|
|
// toggler itself, e.g. if the toggler is called as a method, the
|
|
// callback's 'this' will reference it's parent object.
|
|
//
|
|
// 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.
|
|
//
|
|
// XXX revize/update this doc for Toggler(..)
|
|
|
|
|
|
|
|
// Make a generic toggler function/method...
|
|
//
|
|
// state_accessor signature:
|
|
//
|
|
// Get current state:
|
|
// state_accessor(<elem>)
|
|
// -> <current-state>
|
|
//
|
|
// Set new state:
|
|
// state_accessor(<elem>, <new-state>)
|
|
// -> <new-state>
|
|
//
|
|
// `this' within <state_accessor> is set to toggler's context.
|
|
//
|
|
// NOTE: for single state toggling, 'none' will get passed to
|
|
// state_accessor to indicate an "empty" state...
|
|
// NOTE: if elem is a function it will be called in the same context as
|
|
// the toggler and is expected to return the element.
|
|
//
|
|
//
|
|
// states can be:
|
|
// <state> - state string, equivalent to ['none', <state>]
|
|
// this will produce a bool toggler that will toggle
|
|
// a single state on and off.
|
|
// [<state>, ...] - list of string states that will be toggled
|
|
// through, one special state 'none' is supported
|
|
// function(){ ... } - function that will return either a state or
|
|
// a list of states, `this' will be set to
|
|
// the toggler's context...
|
|
//
|
|
//
|
|
// XXX technically we do not need both elem and state_accessor here, the
|
|
// later is enough, but as strict mode is not stable enough (sometimes
|
|
// works and sometimes does not), we can not reliably pass the element
|
|
// via 'this'.
|
|
// XXX add .toString(..) to resulting function to print the source of all
|
|
// the handlers...
|
|
var Toggler =
|
|
module.Toggler =
|
|
function(elem, state_accessor, states, callback_a, callback_b){
|
|
// normalize states...
|
|
var states_getter = states
|
|
var state_set = typeof(states) == typeof('str') ? ['none', states] : states
|
|
// normalize the callbacks...
|
|
if(callback_b === undefined){
|
|
var callback_pre = null
|
|
var callback_post = callback_a
|
|
} else {
|
|
var callback_pre = callback_a
|
|
var callback_post = callback_b
|
|
}
|
|
|
|
// NOTE: this needs to be strict so as to be able to distinguish
|
|
// between a method and a root context in a simple manner...
|
|
var func = function(a, b){
|
|
// XXX for some magical reason this does not work...
|
|
'use strict'
|
|
|
|
// parse arguments...
|
|
if(b == null){
|
|
var action = a == 'next' ? null : a
|
|
// XXX is this correct???
|
|
//var e = this
|
|
var e = elem
|
|
} else {
|
|
var e = a
|
|
var action = b == 'next' ? null : b
|
|
}
|
|
|
|
e = e instanceof Function ? e.call(this) : e
|
|
|
|
// see if we got an explicit state list or need to use a getter...
|
|
var states = state_set
|
|
if(states_getter instanceof Function){
|
|
// get the states...
|
|
var states = states_getter.call(this)
|
|
states = typeof(states) == typeof('str') ?
|
|
['none', states]
|
|
: states
|
|
}
|
|
var bool_action = (state_set.length == 2 && state_set[0] == 'none')
|
|
|
|
// XXX is this correct???
|
|
var args = [].slice.call(arguments).slice(2)
|
|
|
|
// option number...
|
|
if(typeof(action) == typeof(1)){
|
|
// range check...
|
|
if(action < 0 || action >= states.length){
|
|
return null
|
|
}
|
|
if(bool_action){
|
|
action = action == 0 ? 'off' : 'on'
|
|
} else {
|
|
action = states[action]
|
|
}
|
|
}
|
|
|
|
// get the state list...
|
|
if(action == '??'){
|
|
return states
|
|
|
|
// we need to get the current state...
|
|
} else if(action == null
|
|
|| action == 'prev'
|
|
|| action == '?'
|
|
|| action == '!'){
|
|
// get current state...
|
|
var cur = state_accessor.call(this, e)
|
|
|
|
// just asking for info...
|
|
if(action == '?'){
|
|
return bool_action ? (cur == 'none' ? 'off' : 'on') : cur
|
|
/*
|
|
// NOTE: if cur is not in states then return it as-is...
|
|
return bool_action ? (
|
|
cur == 'none' ? 'off'
|
|
: cur == states[1-states.indexOf('none')] ? 'on'
|
|
: cur)
|
|
: cur
|
|
*/
|
|
}
|
|
|
|
// force reload of current state...
|
|
if(action == '!'){
|
|
action = bool_action ? (cur == 'none' ? 'off' : 'on') : cur
|
|
}
|
|
|
|
// invalid action...
|
|
} else if((bool_action && ['on', 'off'].indexOf(action) == -1)
|
|
|| (!bool_action && states.indexOf(action) == -1)){
|
|
return null
|
|
}
|
|
|
|
var state = bool_action ? states[action == 'off' ? 0 : 1] : action
|
|
// get the right class...
|
|
if(action == null || action == 'prev'){
|
|
if(action == 'prev'){
|
|
var i = states.indexOf(cur)-1
|
|
i = i <= -1 ? states.length-1 : i
|
|
|
|
} else {
|
|
var i = states.indexOf(cur)+1
|
|
//i = i == -1 ? 0 : i
|
|
i = i == states.length ? 0 : i
|
|
}
|
|
|
|
|
|
state = states[i]
|
|
|
|
if(bool_action){
|
|
action = state == 'none' ? 'off' : 'on'
|
|
} else {
|
|
action = state
|
|
}
|
|
}
|
|
|
|
// NOTE: the callbacks are passed the same this as the calling
|
|
// function, this will enable them to act as metods correctly
|
|
// pre callback...
|
|
if(callback_pre != null){
|
|
if(callback_pre.apply(this, [action, e].concat(args)) === false){
|
|
//return
|
|
return func.call(this, '?')
|
|
}
|
|
}
|
|
|
|
// update the element...
|
|
state_accessor.call(this, e, state)
|
|
|
|
// post callback...
|
|
if(callback_post != null){
|
|
var res = callback_post.apply(this, [action, e].concat(args))
|
|
if(res !== undefined){
|
|
action = res
|
|
}
|
|
}
|
|
|
|
return action
|
|
}
|
|
|
|
// XXX these are broken -- this is wrong...
|
|
// ...do not see how to fix this now in a good way...
|
|
if(states_getter instanceof Function){
|
|
Object.defineProperty(func, 'states', {
|
|
get: function(){ return states_getter.apply(this) },
|
|
})
|
|
Object.defineProperty(func, 'doc', {
|
|
get: function(){
|
|
if(func.__doc != null){
|
|
return func.__doc
|
|
}
|
|
var states = states_getter instanceof Function ?
|
|
states_getter.apply(this)
|
|
: state_set
|
|
|
|
// bool_action...
|
|
if(states.length == 2 && states[0] == 'none'){
|
|
return '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 {
|
|
return 'With no arguments this will toggle between '
|
|
+ states +' 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.'
|
|
}
|
|
},
|
|
set: function(value){
|
|
func.__doc = value
|
|
},
|
|
})
|
|
|
|
} else {
|
|
func.states = state_set
|
|
if(state_set.length == 2 && state_set[0] == 'none'){
|
|
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 '
|
|
+ state_set +' 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.'
|
|
}
|
|
}
|
|
|
|
|
|
func.__proto__ = Toggler.prototype
|
|
func.constructor = Toggler
|
|
|
|
return func
|
|
}
|
|
Toggler.prototype.__proto__ = Function.prototype
|
|
|
|
|
|
// XXX this should be drop-in compatible with createCSSClassToggler(..)
|
|
// test and replace...
|
|
var CSSClassToggler =
|
|
module.CSSClassToggler =
|
|
function CSSClassToggler(elem, classes, callback_a, callback_b){
|
|
var classes_getter = classes
|
|
var classes_set = classes
|
|
|
|
var getClasses = function(){
|
|
var classes = typeof(classes_getter) == typeof(function(){}) ?
|
|
classes_getter.call(this)
|
|
: classes_set
|
|
classes = typeof(classes) == typeof('str') ? ['none', classes] : 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...
|
|
return classes
|
|
.map(function(e){
|
|
return e.split(' ')
|
|
.map(function(c){
|
|
c = c.trim()
|
|
return c[0] == '.' ? c.slice(1) : c
|
|
}).join(' ')
|
|
})
|
|
}
|
|
|
|
// normalize...
|
|
// NOTE: this happens here once if we got explicit classes, and on
|
|
// each access if we get a getter function...
|
|
classes_set = typeof(classes_getter) != typeof(function(){}) ?
|
|
getClasses.call(this)
|
|
: classes_set
|
|
|
|
var toggler = Toggler(
|
|
elem,
|
|
function(e, state){
|
|
'use strict'
|
|
|
|
var classes = classes_set.constructor === Array ?
|
|
classes_set
|
|
: getClasses.call(this)
|
|
|
|
e = $(e == null ? elem : e)
|
|
// get the state...
|
|
if(state == null){
|
|
var cur = 'none'
|
|
for(var i=0; i < classes.length; i++){
|
|
// XXX make this faster by getting the class list once
|
|
// and checking in that rather than doing a
|
|
// .hasClass(..) per iteration...
|
|
if(e.hasClass(classes[i])){
|
|
cur = classes[i]
|
|
break
|
|
}
|
|
}
|
|
return cur
|
|
|
|
// set the state...
|
|
} else {
|
|
e.removeClass(classes.join(' '))
|
|
if(state != 'none' && state != 'off'){
|
|
e.addClass(state)
|
|
}
|
|
}
|
|
},
|
|
typeof(classes_getter) == typeof(function(){}) ? getClasses : classes_set,
|
|
callback_a,
|
|
callback_b)
|
|
|
|
toggler.__proto__ = CSSClassToggler.prototype
|
|
toggler.constructor = CSSClassToggler
|
|
|
|
return toggler
|
|
}
|
|
|
|
CSSClassToggler.prototype.__proto__ = Toggler.prototype
|
|
|
|
|
|
|
|
/**********************************************************************
|
|
* vim:set ts=4 sw=4 : */ return module })
|