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Work in progress aux configuration ranges.

This commit is contained in:
Dominic Clifton 2014-10-11 23:08:15 +01:00
parent 875a81e11d
commit e892cbdbad
8 changed files with 657 additions and 134 deletions

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/*jslint browser: true */
/*jslint white: true */
(function( $ ){
'use strict';
// Helpers
// Test in an object is an instance of jQuery or Zepto.
function isInstance ( a ) {
return a instanceof $ || ( $.zepto && $.zepto.isZ(a) );
}
// Link types
function fromPrefix ( target, method ) {
// If target is a string, a new hidden input will be created.
if ( typeof target === 'string' && target.indexOf('-inline-') === 0 ) {
// By default, use the 'html' method.
this.method = method || 'html';
// Use jQuery to create the element
this.target = this.el = $( target.replace('-inline-', '') || '<div/>' );
return true;
}
}
function fromString ( target ) {
// If the string doesn't begin with '-', which is reserved, add a new hidden input.
if ( typeof target === 'string' && target.indexOf('-') !== 0 ) {
this.method = 'val';
var element = document.createElement('input');
element.name = target;
element.type = 'hidden';
this.target = this.el = $(element);
return true;
}
}
function fromFunction ( target ) {
// The target can also be a function, which will be called.
if ( typeof target === 'function' ) {
this.target = false;
this.method = target;
return true;
}
}
function fromInstance ( target, method ) {
if ( isInstance( target ) && !method ) {
// If a jQuery/Zepto input element is provided, but no method is set,
// the element can assume it needs to respond to 'change'...
if ( target.is('input, select, textarea') ) {
// Default to .val if this is an input element.
this.method = 'val';
// Fire the API changehandler when the target changes.
this.target = target.on('change.liblink', this.changeHandler);
} else {
this.target = target;
// If no method is set, and we are not auto-binding an input, default to 'html'.
this.method = 'html';
}
return true;
}
}
function fromInstanceMethod ( target, method ) {
// The method must exist on the element.
if ( isInstance( target ) &&
(typeof method === 'function' ||
(typeof method === 'string' && target[method]))
) {
this.method = method;
this.target = target;
return true;
}
}
var
/** @const */
creationFunctions = [fromPrefix, fromString, fromFunction, fromInstance, fromInstanceMethod];
// Link Instance
/** @constructor */
function Link ( target, method, format ) {
var that = this, valid = false;
// Forward calls within scope.
this.changeHandler = function ( changeEvent ) {
var decodedValue = that.formatInstance.from( $(this).val() );
// If the value is invalid, stop this event, as well as it's propagation.
if ( decodedValue === false || isNaN(decodedValue) ) {
// Reset the value.
$(this).val(that.lastSetValue);
return false;
}
that.changeHandlerMethod.call( '', changeEvent, decodedValue );
};
// See if this Link needs individual targets based on its usage.
// If so, return the element that needs to be copied by the
// implementing interface.
// Default the element to false.
this.el = false;
// Store the formatter, or use the default.
this.formatInstance = format;
// Try all Link types.
/*jslint unparam: true*/
$.each(creationFunctions, function(i, fn){
valid = fn.call(that, target, method);
return !valid;
});
/*jslint unparam: false*/
// Nothing matched, throw error.
if ( !valid ) {
throw new RangeError("(Link) Invalid Link.");
}
}
// Provides external items with the object value.
Link.prototype.set = function ( value ) {
// Ignore the value, so only the passed-on arguments remain.
var args = Array.prototype.slice.call( arguments ),
additionalArgs = args.slice(1);
// Store some values. The actual, numerical value,
// the formatted value and the parameters for use in 'resetValue'.
// Slice additionalArgs to break the relation.
this.lastSetValue = this.formatInstance.to( value );
// Prepend the value to the function arguments.
additionalArgs.unshift(
this.lastSetValue
);
// When target is undefined, the target was a function.
// In that case, provided the object as the calling scope.
// Branch between writing to a function or an object.
( typeof this.method === 'function' ?
this.method :
this.target[ this.method ] ).apply( this.target, additionalArgs );
};
// Developer API
/** @constructor */
function LinkAPI ( origin ) {
this.items = [];
this.elements = [];
this.origin = origin;
}
LinkAPI.prototype.push = function( item, element ) {
this.items.push(item);
// Prevent 'false' elements
if ( element ) {
this.elements.push(element);
}
};
LinkAPI.prototype.reconfirm = function ( flag ) {
var i;
for ( i = 0; i < this.elements.length; i += 1 ) {
this.origin.LinkConfirm(flag, this.elements[i]);
}
};
LinkAPI.prototype.remove = function ( flag ) {
var i;
for ( i = 0; i < this.items.length; i += 1 ) {
this.items[i].target.off('.liblink');
}
for ( i = 0; i < this.elements.length; i += 1 ) {
this.elements[i].remove();
}
};
LinkAPI.prototype.change = function ( value ) {
if ( this.origin.LinkIsEmitting ) {
return false;
}
this.origin.LinkIsEmitting = true;
var args = Array.prototype.slice.call( arguments, 1 ), i;
args.unshift( value );
// Write values to serialization Links.
// Convert the value to the correct relative representation.
for ( i = 0; i < this.items.length; i += 1 ) {
this.items[i].set.apply(this.items[i], args);
}
this.origin.LinkIsEmitting = false;
};
// jQuery plugin
function binder ( flag, target, method, format ){
if ( flag === 0 ) {
flag = this.LinkDefaultFlag;
}
// Create a list of API's (if it didn't exist yet);
if ( !this.linkAPI ) {
this.linkAPI = {};
}
// Add an API point.
if ( !this.linkAPI[flag] ) {
this.linkAPI[flag] = new LinkAPI(this);
}
var linkInstance = new Link ( target, method, format || this.LinkDefaultFormatter );
// Default the calling scope to the linked object.
if ( !linkInstance.target ) {
linkInstance.target = $(this);
}
// If the Link requires creation of a new element,
// Pass the element and request confirmation to get the changehandler.
// Set the method to be called when a Link changes.
linkInstance.changeHandlerMethod = this.LinkConfirm( flag, linkInstance.el );
// Store the linkInstance in the flagged list.
this.linkAPI[flag].push( linkInstance, linkInstance.el );
// Now that Link have been connected, request an update.
this.LinkUpdate( flag );
}
/** @export */
$.fn.Link = function( flag ){
var that = this;
// Delete all linkAPI
if ( flag === false ) {
return that.each(function(){
// .Link(false) can be called on elements without Links.
// When that happens, the objects can't be looped.
if ( !this.linkAPI ) {
return;
}
$.map(this.linkAPI, function(api){
api.remove();
});
delete this.linkAPI;
});
}
if ( flag === undefined ) {
flag = 0;
} else if ( typeof flag !== 'string') {
throw new Error("Flag must be string.");
}
return {
to: function( a, b, c ){
return that.each(function(){
binder.call(this, flag, a, b, c);
});
}
};
};
}( window.jQuery || window.Zepto ));

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