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refactor for clarity

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This commit is contained in:
David Greenspan
2012-04-24 20:19:15 -07:00
parent 9e75e13c85
commit 009c588ee3
1 changed files with 50 additions and 45 deletions
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95
packages/liveui/liveui.js
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@@ -355,37 +355,6 @@ Meteor.ui = Meteor.ui || {};
}
};
// XXX jQuery dependency
Meteor.ui._setupEvents = function (elt, events, event_data) {
events = events || {};
for (var spec in events) {
var clauses = spec.split(/,\s+/);
_.each(clauses, function (clause) {
var parts = clause.split(/\s+/);
if (parts.length === 0)
return;
var event = parts.shift();
var selector = parts.join(' ');
var callback = events[spec];
$.event.add(elt, event+".liveui", function(evt) {
if (selector) {
// target must match selector
var target = evt.target;
// use element's parentNode as a "context"; any elements
// referenced in the selector must be proper descendents
// of the context.
var results = $(elt.parentNode).find(selector);
if (! _.contains(results, target))
return;
}
callback.call(event_data, evt);
});
});
}
};
// Performs a replacement by determining which nodes should
// be preserved and invoking Meteor.ui._Patcher as appropriate.
Meteor.ui._intelligent_replace = function(tgtRange, srcParent) {
@@ -570,28 +539,64 @@ Meteor.ui = Meteor.ui || {};
// Attach events specified by `range` to top-level nodes in `range`.
var attach_primary_events = function(range) {
if (range.events) {
for(var n = range.firstNode();
n && n.previousSibling !== range.lastNode();
n = n.nextSibling) {
Meteor.ui._setupEvents(n, range.events, range.event_data);
}
}
Meteor.ui._attachEvents(range.firstNode(), range.lastNode(),
range.events, range.event_data);
};
// Attach events specified by enclosing ranges of `range`, at the
// same DOM level, to nodes in `range`.
// same DOM level, to nodes in `range`. This is necessary if
// `range` has just been inserted (as in the case of list 'added'
// events) or if it has been re-rendered but its enclosing ranges
// haven't. In either case, the nodes in `range` have been rendered
// without taking enclosing ranges into account, so additional event
// handlers need to be attached.
var attach_secondary_events = function(range) {
for(var r = range; r; r = r.findParent(true)) {
if (r === range)
continue;
for(var n = range.firstNode();
n && n.previousSibling !== range.lastNode();
n = n.nextSibling) {
Meteor.ui._setupEvents(n, r.events, r.event_data);
}
Meteor.ui._attachEvents(range.firstNode(), range.lastNode(),
r.events, r.event_data);
}
};
// XXX jQuery dependency
Meteor.ui._attachEvents = function (start, end, events, event_data) {
events = events || {};
// iterate over `spec: callback` map
_.each(events, function(callback, spec) {
var clauses = spec.split(/,\s+/);
_.each(clauses, function (clause) {
var parts = clause.split(/\s+/);
if (parts.length === 0)
return;
var event = parts.shift();
var selector = parts.join(' ');
var after = end.nextSibling;
for(var n = start; n && n !== after; n = n.nextSibling) {
// use function scope to close over each node `n`.
// otherwise, there is only one `n` for all the callbacks!
(function(bound) {
$.event.add(n, event+".liveui", function(evt) {
if (selector) {
// target must match selector
var target = evt.target;
// use element's parentNode as a "context"; any elements
// referenced in the selector must be proper descendents
// of the context.
var results = $(bound.parentNode).find(selector);
if (! _.contains(results, target))
return;
}
callback.call(event_data, evt);
});
})(n);
}
});
});
};
})();