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// import Divmod
// import Divmod.Runtime
// import Nevow
// import Nevow.Athena
// import Mantissa
Mantissa.LiveForm.FormWidget = Nevow.Athena.Widget.subclass('Mantissa.LiveForm.FormWidget');
Mantissa.LiveForm.FormWidget.DOM_DESCEND = Divmod.Runtime.Platform.DOM_DESCEND;
Mantissa.LiveForm.FormWidget.DOM_CONTINUE = Divmod.Runtime.Platform.DOM_CONTINUE;
Mantissa.LiveForm.MessageFader = Divmod.Class.subclass("Divmod.Class.MessageFader");
/**
Fade a node in, then out again.
*/
Mantissa.LiveForm.MessageFader.methods(
function __init__(self, node) {
self.node = node;
self.timer = null;
self.inRate = 1.0; // in opacity / second
self.outRate = 0.5;
self.messageDelay = 5.0; // number of seconds message is left on-screen
},
/*
* Cause the referenced Node to become fully opaque. It must currently be
* fully transparent. Returns a Deferred which fires when this has been
* done.
*/
function fadeIn(self) {
var currentOpacity = 0.0;
var TICKS_PER_SECOND = 30.0;
var fadedInDeferred = Divmod.Defer.Deferred();
var inStep = function () {
currentOpacity += (self.inRate / TICKS_PER_SECOND)
if (currentOpacity > 1.0) {
self.node.style.opacity = '1.0';
self.timer = null;
fadedInDeferred.callback(null);
} else {
self.node.style.opacity = currentOpacity;
self.timer = setTimeout(inStep, 1000 * 1.0 / TICKS_PER_SECOND);
}
};
/* XXX TODO - "block" is not the right thing to do here. The wrapped
* node might be a table cell or something.
*/
self.node.style.display = 'block';
inStep();
return fadedInDeferred;
},
/*
* Cause the referenced Node to become fully transparent. It must
* currently be fully opaque. Returns a Deferred which fires when this
* has been done.
*/
function fadeOut(self) {
var fadedOutDeferred = Divmod.Defer.Deferred();
var currentOpacity = 0.0;
var TICKS_PER_SECOND = 30.0;
var outStep = function () {
currentOpacity -= (self.outRate / TICKS_PER_SECOND);
if (currentOpacity < 0.0) {
self.node.style.display = 'none';
self.timer = null;
fadedOutDeferred.callback(null);
} else {
self.node.style.opacity = currentOpacity;
self.timer = setTimeout(outStep, 1000 * 1.0 / TICKS_PER_SECOND);
}
};
outStep();
return fadedOutDeferred;
},
/*
* Go through one fade-in/fade-out cycle. Return a Deferred which fires
* when both steps have finished.
*/
function start(self) {
// kick off the timer loop
self.fadeIn().addCallback(function() { return self.fadeOut(); });
});
Mantissa.LiveForm.FormWidget.methods(
function submit(self) {
var d = self.callRemote('invoke', self.gatherInputs());
self.showProgressMessage();
d.addCallback(function(result) {
return self.submitSuccess(result);
});
d.addErrback(function(err) {
return self.submitFailure(err);
});
return d;
},
function showProgressMessage(self) {
var pm = self.nodeByAttribute("class", "progress-message", null);
if (pm !== null) {
pm.style.display = 'block';
}
},
function hideProgressMessage(self) {
var pm = self.nodeByAttribute("class", "progress-message", null);
if (pm !== null) {
pm.style.display = 'none';
}
},
function submitSuccess(self, result) {
var resultstr;
if (!result) {
resultstr = 'Success!';
} else {
resultstr = ''+result;
}
Divmod.log('liveform', 'Form submitted: ' + resultstr);
self.node.reset();
self.hideProgressMessage();
var succm = self.nodeByAttribute('class', 'success-message', null);
if (succm === null) {
return Divmod.Defer.succeed(null);
}
succm.appendChild(document.createTextNode(resultstr));
return self.runFader(Mantissa.LiveForm.MessageFader(succm));
},
// Not the best factoring, but we use this as a hook in
// Mantissa.Validate.SignupForm - if you can factor this better please do
// so.
function runFader(self, fader) {
return fader.start();
},
function submitFailure(self, err) {
Divmod.log('liveform', 'Error submitting form: ' + err);
return err;
},
function traverse(self, visitor) {
return Divmod.Runtime.theRuntime.traverse(self.node, visitor);
},
function getFormName(self) {
// XXX TODO: the real way to do this would be to have a JSON object
// sent from the server as part of the initialization process. I'm
// not sure where to squirrel that away right now, and I only need
// this one string. Feel free to fix.
return Nevow.Athena.getAttribute(
self.node, Nevow.Athena.XMLNS_URI, 'athena', 'formname');
},
/**
* Returns a list of input nodes.
*/
function gatherInputs(self) {
var inputs = {};
var pushOneValue = function(name, value) {
if (inputs[name] == undefined) {
inputs[name] = [];
}
// Divmod.log("inputs", "adding input: " + name + " = " + value);
inputs[name].push(value);
};
// First we gather our widget children.
for (var i = 0; i < self.childWidgets.length; i++) {
var wdgt = self.childWidgets[i];
if ((wdgt.getFormName != undefined)
&& (wdgt.gatherInputs != undefined)) {
var inputname = wdgt.getFormName();
pushOneValue(inputname, wdgt.gatherInputs());
}
}
// Now we go after some nodes.
self.traverse(function (aNode) {
if (aNode === self.node) {
return Mantissa.LiveForm.FormWidget.DOM_DESCEND;
}
if (Nevow.Athena.athenaIDFromNode(aNode) != null) {
// It's a widget. We caught it in our other pass; let's
// not look at any of its nodes.
return Mantissa.LiveForm.FormWidget.DOM_CONTINUE;
} else {
if (aNode.tagName) {
// It's an element
if (aNode.tagName.toLowerCase() == 'input') {
// It's an input
// If it's a checkbox or radio, we care about its
// checked-ness.
var aValue = null;
if (aNode.type.toLowerCase() == 'checkbox') {
aValue = aNode.checked;
} else if (aNode.type.toLowerCase() == 'radio') {
aValue = aNode.checked;
} else {
aValue = aNode.value;
}
pushOneValue(aNode.name, aValue);
} else if (aNode.tagName.toLowerCase() == 'textarea') {
// It's also an input, just not an input
// input.
var aValue = aNode.value;
pushOneValue(aNode.name, aValue);
} else if (aNode.tagName.toLowerCase() == 'select') {
if (aNode.type == 'select-one') {
pushOneValue(aNode.name, aNode.value);
} else {
// If multiple values can be selected, get them
var values = [];
for (var i = 0; i < aNode.options.length; i++) {
if (aNode.options[i].selected) {
values.push(aNode.options[i].value);
}
}
pushOneValue(aNode.name, values);
}
} else {
// Examine the children, since it is some
// other kind of element.
return Mantissa.LiveForm.FormWidget.DOM_DESCEND;
}
// Inputs should not have sub-inputs; hooray a
// free optimization.
return Mantissa.LiveForm.FormWidget.DOM_CONTINUE;
}
// It's a text node... do we really need to
// descend?
return Mantissa.LiveForm.FormWidget.DOM_DESCEND;
}
});
return inputs;
});
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