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Bug #109929 --> cache email address nodes in the multi toggle email address widget. This helps with

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message display performance.
r=ssu
sr=sspitzer
This commit is contained in:
mscott%netscape.com 2001-11-20 03:29:27 +00:00
parent a409c0bbbe
commit 6e9f6e209d
1 changed files with 69 additions and 6 deletions
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75
mailnews/base/resources/content/mailWidgets.xml
View File

@ -92,6 +92,10 @@
<field name="mLongViewCreated"/>
<field name="mAddresses"/>
<!-- as a perf optimization we are going to keep a cache of email address nodes which we've
created around for the lifetime of the widget. mSizeOfAddressCache controls how many of these
elements we keep around -->
<field name="mSizeOfAddressCache">3</field>
<!-- addAddressView: a public method used to add an address to this widget.
aAddresses is an object with 3 properties: displayName, emailAddress and fullAddress
@ -119,6 +123,54 @@
</body>
</method>
<!-- fillCachedAddresses: private method used to fill up any cached pre-existing
emailAddress fields without creating new email address fields. Returns a remainder
for the # of addresses which require new addresses being created.
Invariants: 1) aNumAddressesToShow >= 0 && it is <= mAddresses.length -->
<method name="fillCachedAddresses">
<parameter name="aAddressesNode"/>
<parameter name="aNumAddressesToShow"/>
<body>
<![CDATA[
var numExistingCachedAddresses = aAddressesNode.childNodes.length;
if (!numExistingCachedAddresses)
return this.mAddresses.length; // we couldn't pre fill anything
else if (numExistingCachedAddresses > 1)
numExistingCachedAddresses = (numExistingCachedAddresses + 1)/ 2;
var index = 0;
var numAddressesAdded = 0;
var emailAddressNode;
var commaNode;
while (numAddressesAdded < numExistingCachedAddresses && numAddressesAdded < aNumAddressesToShow)
{
if (index && numExistingCachedAddresses > 1)
{
commaNode = aAddressesNode.childNodes[index++];
if (commaNode)
commaNode.removeAttribute('collapsed');
}
// get the node pointed to by index
emailAddressNode = aAddressesNode.childNodes[index++];
this.updateEmailAddressNode(emailAddressNode, this.mAddresses[numAddressesAdded]);
emailAddressNode.removeAttribute('collapsed');
numAddressesAdded++;
}
// if we have added all of our elements but we still have more cached items in this address node
// then make sure the extra cached copies are collapsed...
numExistingCachedAddresses = aAddressesNode.childNodes.length; // reset
while (index < numExistingCachedAddresses)
{
aAddressesNode.childNodes[index++].setAttribute('collapsed', true);
}
return this.mAddresses.length - numAddressesAdded;
]]>
</body>
</method>
<!-- fillAddressesNode: private method used to create email address nodes for either our short
or long view. aAddressesNode: the div we want to add addresses too.
aNumAddressesToShow: number of addresses to put into the list -->
@ -128,20 +180,22 @@
<body>
<![CDATA[
var numAddresses = this.mAddresses.length;
if (aNumAddressesToShow <= 0) // then show all
if (aNumAddressesToShow <= 0 || aNumAddressesToShow > numAddresses) // then show all
aNumAddressesToShow = numAddresses;
var index = 0;
// before we try to create email address nodes, try to leverage any cached nodes...
var remainder = this.fillCachedAddresses(aAddressesNode, aNumAddressesToShow);
var index = numAddresses - remainder;
while (index < numAddresses && index < aNumAddressesToShow)
{
var newAddressNode= document.createElement("mail-emailaddress");
var newAddressNode = document.createElement("mail-emailaddress");
if (index)
{
var textNode = document.createElement("text");
textNode.setAttribute("value", ", ");
textNode.setAttribute("class", "emailSeparator");
aAddressesNode.appendChild(textNode);
}
}
var itemInDocument = aAddressesNode.appendChild(newAddressNode);
this.updateEmailAddressNode(itemInDocument, this.mAddresses[index]);
@ -221,8 +275,17 @@
<parameter name="aParentNode"/>
<body>
<![CDATA[
while (aParentNode.childNodes.length > 0)
aParentNode.removeChild(aParentNode.childNodes[0]);
// we want to keep around the first mSizeOfAddressCache email address nodes
// don't forget that we have comma text nodes in there too so really we want to keep
// around cache size * 2 - 1.
var numItemsToPreserve = this.mSizeOfAddressCache * 2 - 1;
var numItemsInNode = aParentNode.childNodes.length;
while (numItemsInNode && (numItemsInNode > numItemsToPreserve))
{
aParentNode.removeChild(aParentNode.childNodes[numItemsInNode-1]);
numItemsInNode = numItemsInNode - 1;
}
]]>
</body>
</method>