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@josh
josh committed Jan 29, 2010
0 parents commit 17dfa60
Showing 1 changed file with 324 additions and 0 deletions.
324 changes: 324 additions & 0 deletions src/rails.js
@@ -0,0 +1,324 @@
Event.observe(document, 'dom:loaded', function() {
function handle_remote(el, e){
var data = null,
method = el.readAttribute('method') || el.readAttribute('data-method') || 'GET',
url = el.readAttribute('action') || el.readAttribute('data-url') || '#',
async = el.readAttribute('data-remote-type') === 'synchronous' ? false : true,
update = el.readAttribute('data-update-success'),
position = el.readAttribute('data-update-position');

if (el.readAttribute('data-submit')) {
var submit_el = $(el.readAttribute('data-submit'));
if(submit_el !== undefined && submit_el.tagName.toUpperCase() == 'FORM'){
data = submit_el.serialize();
}
} else if (el.readAttribute('data-with')) {
// It seems there is a big inconsistency between what :with means depending on the element type
// so this is going to look a bit crazy
if(el.tagName.toUpperCase() === 'SCRIPT' && el.readAttribute('data-observed') !== null){
// Handle observe_field and observe_form
var observed_element = $(el.readAttribute('data-observed'));

if(observed_element.tagName.toUpperCase() === 'FORM'){
data = el.readAttribute('data-with') + '=' + observed_element.serialize();
} else if(observed_element.tagName.toUpperCase() === 'INPUT' && observed_element.readAttribute('type').toUpperCase() !== "BUTTON" && observed_element.readAttribute('type').toUpperCase() !== "SUBMIT") {
data = el.readAttribute('data-with') + '=' + observed_element.getValue();
}
} else {
// Handle link_to and button_to
data = evalAttribute(el, 'data-with');
}
} else if(el.tagName.toUpperCase() === 'FORM') {
data = el.serialize();
}

document.fire('rails:before');

var request = new Ajax.Request(url, {
method: method,
asynchronous: async,
parameters: data,
evalJS: true,
evalJSON: true,
onComplete: function(xhr){
document.fire('rails:complete', {xhr: xhr, element: el, submitted_button: getEventProperty(e, 'submitted_button')});
},
onLoading: function(xhr){
document.fire('rails:after', {xhr: xhr, element: el});
document.fire('rails:loading', {xhr: xhr, element: el});
},
onLoaded: function(xhr){
document.fire('rails:loaded', {xhr: xhr, element: el});
},
onSuccess: function(xhr){
document.fire('rails:success', {xhr: xhr, element: el});
},
onFailure: function(xhr){
document.fire('rails:failure', {xhr: xhr, element: el});
}
});

}

function setEventProperty(e, property, value){
if(e.memo === undefined){
e.memo = {};
}

e.memo[property] = value;
}

function getEventProperty(e, property){
if(e !== null && e.memo !== undefined && e.memo[property] !== undefined){
return e.memo[property];
}
}

function confirmed(e, el){
if(getEventProperty(e,'confirm_checked') !== true){
setEventProperty(e, 'confirm_checked', true);

el = Event.findElement(e, 'form') || el;
var confirm_msg = el.readAttribute('data-confirm');

if(confirm_msg !== null){
var result = el.fire('rails:confirm', {confirm_msg: confirm_msg});
if(result.memo.stop_event === true){
Event.stop(e);
return false;
}
}
}
return true;
}

function disable_button(el){
var disable_with = el.readAttribute('data-disable-with');
if(disable_with !== null){
el.writeAttribute('data-enable-with', el.readAttribute('value'));
el.writeAttribute('value', disable_with);
el.writeAttribute('disabled', true);
}
}

function enable_button(el){
var enable_with = el.readAttribute('data-enable-with');
if(enable_with !== null){
el.writeAttribute('value', enable_with);
}
el.writeAttribute('disabled', false);
}

function updateHTML(el, content, result){
var element_id = null;

if(result === 'success'){
element_id = el.readAttribute('data-update-success');
} else if(result === 'failure'){
element_id = el.readAttribute('data-update-failure');
}

var element_to_update = $(element_id);
if(element_to_update !== null){
var position = el.readAttribute('data-update-position');
if(position !== null){
var options = {};
options[position] = content;
element_to_update.insert(options);
} else {
element_to_update.update(content);
}
}
}

$$("script[data-periodical=true]").each(function(el){
var executor = new PeriodicalExecuter(function() { handle_remote(el);}, el.readAttribute('data-frequency'));
});

$$("script[data-observe=true]").each(function(el){
var observed_element = $(el.readAttribute('data-observed'));
var original_value = observed_element.tagName.toUpperCase() === 'FORM' ? observed_element.serialize() : observed_element.getValue();
var callback = el.readAttribute('data-onobserve');
var executor = new PeriodicalExecuter(function() {
var value = observed_element.tagName.toUpperCase() === 'FORM' ? observed_element.serialize() : observed_element.getValue();

if(original_value !== value){
original_value = value;

if(callback !== null){
evalAttribute(el, 'onobserve');
} else if(el.readAttribute('data-url') !== null){
handle_remote(el);
}
}
}, el.readAttribute('data-frequency'));

});

/**
*
* Event Listeners
*
* the original element is contained inside the event,
* for some reason prototype wont let me listen for custom events on document
* if the event wasn't fired on document
*
*/

Event.observe(document, 'submit', function (e) {
var form = Event.findElement(e, 'form');
// Make sure conditions and confirm have not already run
if(form !== undefined && conditions_met(e, form) && confirmed(e, form)){

var button = form.down('input[data-submitted=true]');
button.writeAttribute('data-submitted', null);
setEventProperty(e, 'submitted_button', button);
disable_button(button);

if(form.readAttribute('data-remote') === 'true'){
Event.stop(e);
handle_remote(form, e);
}
}
});

Event.observe(document, 'click', function (e) {
var el = Event.findElement(e, 'a') || Event.findElement(e, 'input');

if(el !== undefined && el.tagName.toUpperCase() === 'INPUT' && el.readAttribute('type').toUpperCase() === 'SUBMIT'){
el.writeAttribute('data-submitted', 'true');

// Submit is handled by submit event, don't continue on this path
el = undefined;
} else if(el !== undefined && el.tagName.toUpperCase() === 'INPUT' && el.readAttribute('type').toUpperCase() !== 'BUTTON'){
// Make sure other inputs do not send this event
el = undefined;
}

if(el !== undefined && conditions_met(e, el) && confirmed(e, el)){
if(el.tagName.toUpperCase() === 'INPUT' && el.readAttribute('type').toUpperCase() === 'BUTTON'){
disable_button(el);
}

if(el.readAttribute('data-remote') === 'true'){
Event.stop(e);
handle_remote(el, e);
} else if(el.readAttribute('data-popup') !== null){
Event.stop(e);
document.fire('rails:popup', {element: el});
}
}
});

/**
*
* Default Event Handlers
*
*/
Event.observe(document, 'rails:confirm', function(e){
setEventProperty(e, 'stop_event', !confirm(getEventProperty(e,'confirm_msg')));
});

Event.observe(document, 'rails:popup', function(e){
var el = getEventProperty(e, 'element');
var url = el.readAttribute('href') || el.readAttribute('data-url');

if(el.readAttribute('data-popup') === true){
window.open(url);
} else {
window.open(url, el.readAttribute('data-popup'));
}
});

Event.observe(document, 'rails:complete', function(e){
var el = getEventProperty(e, 'element');

if(el.tagName.toUpperCase() === 'FORM'){
var button = getEventProperty(e, 'submitted_button') ;
enable_button(button);
}
});

Event.observe(document, 'rails:success', function(e){
var el = getEventProperty(e, 'element'),
xhr = getEventProperty(e, 'xhr');

if(xhr.responseText !== null){
updateHTML(el, xhr.responseText, 'success');
}
});

Event.observe(document, 'rails:failure', function(e){
var el = getEventProperty(e, 'element'),
xhr = getEventProperty(e, 'xhr');

if(xhr.responseText !== null){
updateHTML(el, xhr.responseText, 'failure');
}
});

/**
*
* Rails 2.x Helpers / Event Handlers
*
*/
function evalAttribute(el, attribute){
var js = el.readAttribute('data-' + attribute);

if(js){
eval(js);
}
}

function conditions_met(e, el){
if(getEventProperty(e,'condition_checked') !== true){
setEventProperty(e, 'condition_checked', true);

el = Event.findElement(e, 'form') || el;
var conditions = el.readAttribute('data-condition');

if(conditions !== null){
if(eval(conditions) === false){
Event.stop(e);
return false;
}
}
}
return true;
}

Event.observe(document, 'rails:success', function(e){
evalAttribute(el, 'onsuccess');
});

Event.observe(document, 'rails:failure', function(e){
evalAttribute(el, 'onfailure');
});

Event.observe(document, 'rails:complete', function(e){
var el = getEventProperty(e, 'element');

evalAttribute(el, 'oncomplete');
evalAttribute(el, 'on' + getEventProperty('xhr', xhr.status));

if(el.readAttribute('data-periodical') === 'true'){
evalAttribute(el, 'onobserve');
}
});

Event.observe(document, 'rails:loading', function(e){
evalAttribute(el, 'onloading');
});

Event.observe(document, 'rails:loaded', function(e){
evalAttribute(el, 'onloaded');
});

Event.observe(document, 'rails:before', function(e){
evalAttribute(el, 'onbefore');
});

Event.observe(document, 'rails:after', function(e){
evalAttribute(el, 'onafter');
});
});

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