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move more literals to the 'conventions' map, improve comments

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This commit is contained in:
Scott Miles
2012-11-05 11:35:51 -08:00
parent bc7882ffa9
commit e340cf7b7a
1 changed files with 30 additions and 10 deletions
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40
src/g-component.html
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@@ -11,10 +11,15 @@ license that can be found in the LICENSE file.
});
</script>
<script>
// conventional names have implicit bindings
// conventional names for automation
var conventions = {
ATTRIBUTES_ATTRIBUTE: "attributes",
DELEGATES_DIRECTIVE: "bind",
OBSERVE_DIRECTIVE: "observe",
PROPERTY_CHANGED_SUFFIX: "Changed",
CUSTOM_EVENT_PREFIX: "on-"
CUSTOM_EVENT_PREFIX: "on-",
BINDING_OUT_SUFFIX: "Output",
BINDING_IN_SUFFIX: "Input"
};
// polyfill for DOMTokenList features:
@@ -193,8 +198,9 @@ license that can be found in the LICENSE file.
};
var establishNodeReferences = function(inRoot) {
// establish $ instance variable
this.$ = this.$ || {};
// search the LOCAL tree
// populate $ from nodes with ID from the LOCAL tree
if (inRoot) {
var nodes = ShadowDOM.localQueryAll(inRoot, "[id]");
Array.prototype.forEach.call(nodes, function(n) {
@@ -215,15 +221,21 @@ license that can be found in the LICENSE file.
if (inDelegates) {
var node = this;
this.modelDelegate = function(inBinding) {
if (inDelegates[inBinding]) {
//console.log("bindDelegates:", inBinding, node);
if (inBinding in inDelegates) {
var dependencies = inDelegates[inBinding] || [inBinding];
if (typeof dependencies == 'string') {
dependencies = [dependencies];
}
//console.log("bindDelegates:", inBinding, dependencies, node);
var inMethod = inBinding + conventions.BINDING_IN_SUFFIX;
var outMethod = inBinding + conventions.BINDING_OUT_SUFFIX;
return [
inDelegates[inBinding],
dependencies,
function(/*inValues*/) {
return delegateBinding(node, inBinding + "Out", arguments);
return delegateBinding(node, outMethod, arguments);
},
function(/*inValues*/) {
return delegateBinding(node, inBinding + "In", arguments);
return delegateBinding(node, inMethod, arguments);
}
];
}
@@ -232,8 +244,10 @@ license that can be found in the LICENSE file.
};
var delegateBinding = function(inNode, inDelegate, inValues) {
// late binding to named delegate function
var fn = inNode[inDelegate];
var value = fn ? fn.apply(inNode, inValues) : undefined;
// whenever undefined, echo back first input value
if (value === undefined) {
value = inValues[0];
}
@@ -336,7 +350,8 @@ license that can be found in the LICENSE file.
// per-instance
var automate = function(inAttributes, inPublished, inDelegates) {
bindAttrs.call(this, inAttributes.attributes);
bindAttrs.call(this, inAttributes[conventions.ATTRIBUTES_ATTRIBUTE]);
// TODO(sjmiles): replace with on-* syntax
bindEvents.call(this, inAttributes.handlers);
bindProperties.call(this, inPublished);
bindDelegates.call(this, inDelegates);
@@ -369,7 +384,12 @@ license that can be found in the LICENSE file.
created: function() {
//console.log("created", this);
this.controller = this;
automate.call(this, attributes, inUber.published, inUber.delegates);
automate.call(this,
attributes,
// TODO(sjmiles): remove backward-compatibility expressions
inUber[conventions.OBSERVE_DIRECTIVE] || inUber.published,
inUber[conventions.DELEGATES_DIRECTIVE] || inUber.bindings || inUber.delegates
);
takeAttributes.call(this);
if (inUber.created) {
inUber.created.call(this);