Make LDAP autocompletion respect UI setting for maximum number of hits to return (bug 77388). r=leif@netscape.com, sr=mscott@netscape.com, a=blizzard@mozilla.org

mailnews/addrbook/public/nsILDAPAutoCompleteSession.idl

@@ -61,13 +61,19 @@ interface nsILDAPAutoCompleteSession : nsIAutoCompleteSession {
     attribute wstring outputFormat;
 
     /**
-     * If non-zero, limit lookups to at most this many entries.  If this
+     * At most this many nsIAutoCompleteItems will be returned.  This
-     * limit is hit during a lookup, the search will simply return 
+     * is useful for keeping bandwidth usage over slow-speed
-     * |nsIAutoCompleteStatus::ignored|.
+     * connections as well as ensuring that the number of choices
+     * offered in the UI is manageble.
      *
-     * @exception NS_ERROR_NULL_POINTER  NULL pointer passed to getter
+     * 1-65535 are interpreted literally
+     * 0 means "unlimited"
+     * -1 uses the default limit for the LDAP connection in use
+     * 
+     * @exception NS_ERROR_NULL_POINTER     NULL pointer passed to getter
+     * @exception NS_ERROR_ILLEGAL_VALUE    Out-of-range value passed to setter
      */
-    attribute long sizeLimit;
+    attribute long maxHits;
 
     /**
      * Strings shorter than this will return |nsIAutoCompleteStatus::ignored|

mailnews/addrbook/src/nsLDAPAutoCompleteSession.cpp

@@ -48,7 +48,7 @@ NS_IMPL_ISUPPORTS3(nsLDAPAutoCompleteSession, nsIAutoCompleteSession,
                    nsILDAPMessageListener, nsILDAPAutoCompleteSession)
 
 nsLDAPAutoCompleteSession::nsLDAPAutoCompleteSession() :
-    mState(UNBOUND), mMinStringLength(0)
+    mState(UNBOUND), mMaxHits(100), mMinStringLength(0)
 {
     NS_INIT_ISUPPORTS();
 }
@@ -918,7 +918,7 @@ nsLDAPAutoCompleteSession::StartLDAPSearch()
     //
     rv = mOperation->SearchExt(NS_ConvertUTF8toUCS2(dn).get(), scope, 
                                NS_ConvertUTF8toUCS2(searchFilter).get(),
-                               0, nsILDAPOperation::NO_LIMIT);
+                               0, mMaxHits);
     if (NS_FAILED(rv)) {
         switch(rv) {
 
@@ -1196,21 +1196,25 @@ nsLDAPAutoCompleteSession::SetOutputFormat(const PRUnichar * aOutputFormat)
     return NS_OK;
 }
 
-// attribute long sizeLimit;
+// attribute long maxHits;
 NS_IMETHODIMP 
-nsLDAPAutoCompleteSession::GetSizeLimit(PRInt32 *aSizeLimit)
+nsLDAPAutoCompleteSession::GetMaxHits(PRInt32 *aMaxHits)
 {
-    if (!aSizeLimit) {
+    if (!aMaxHits) {
         return NS_ERROR_NULL_POINTER;
     }
 
-    *aSizeLimit = mSizeLimit;
+    *aMaxHits = mMaxHits;
     return NS_OK;
 }
 NS_IMETHODIMP 
-nsLDAPAutoCompleteSession::SetSizeLimit(PRInt32 aSizeLimit)
+nsLDAPAutoCompleteSession::SetMaxHits(PRInt32 aMaxHits)
 {
-    mSizeLimit = aSizeLimit;
+    if ( aMaxHits < -1 || aMaxHits > 65535) {
+        return NS_ERROR_ILLEGAL_VALUE;
+    }
+
+    mMaxHits = aMaxHits;
     return NS_OK;
 }
 

mailnews/addrbook/src/nsLDAPAutoCompleteSession.h

@@ -61,7 +61,7 @@ class nsLDAPAutoCompleteSession : public nsILDAPMessageListener,
     nsString mFilterTemplate;                     // search filter template
     nsString mOutputFormat;                       // how to format output
     nsCOMPtr<nsILDAPURL> mServerURL;        // URL for the directory to search
-    PRInt32 mSizeLimit;                     // return at most this many entries
+    PRInt32 mMaxHits;                       // return at most this many entries
     PRUint32 mMinStringLength;              // strings < this size are ignored
     
     // stopgap until nsLDAPService works