Let the user tabs into the body from the subject edit field. Fix bug 10932

mailnews/compose/resources/content/MsgComposeCommands.js

@@ -24,6 +24,7 @@ var msgCompose = null;
 var MAX_RECIPIENTS = 0;
 var numAttachments = 0;
 var currentAttachment = null;
+var tabIntoBodyPhase = 0;
 
 var other_header = "";
 var update_compose_title_as_you_type = true;
@@ -498,8 +499,6 @@ function CloseWindow()
 		msgCompose.CloseWindow();
 }
 
-
-
 function AttachFile()
 {
 	dump("AttachFile()\n");
@@ -569,3 +568,33 @@ function AttachVCard()
 {
 	dump("AttachVCard()\n");
 }
+
+function ShouldITabIntoBody(phase)
+{
+	if (phase != tabIntoBodyPhase)
+	{
+		tabIntoBodyPhase = 0;
+		return;
+	}
+	
+	switch (phase)
+	{
+		case 0:
+			tabIntoBodyPhase ++;
+			setTimeout("tabIntoBodyPhase = 0;", 250);
+			break;
+	
+		case 1:
+			tabIntoBodyPhase ++;
+			break;
+	
+		case 2:
+			contentWindow.focus();
+			tabIntoBodyPhase = 0;
+			break;
+
+		default:
+			tabIntoBodyPhase = 0;
+			break;		
+	}
+}

mailnews/compose/resources/content/messengercompose.xul

@@ -278,7 +278,10 @@ Rights Reserved.
 			<box align="vertical" flex="60%">
 				<box align="horizontal" flex="100%">
 					<html:div flex="20%">&fromAddr.label;</html:div>
-					<html:select id="msgIdentity" flex="80%"/>
+					<html:select id="msgIdentity" flex="80%"
+						onkeyup="if (event.which == 9) ShouldITabIntoBody(2);"
+						onfocus="ShouldITabIntoBody(1);"
+						/>
 				</box>
 				<spring style="height:0.5em"/>
 				<box align="horizontal" flex="100%">
@@ -293,7 +296,10 @@ Rights Reserved.
 				
 				<box align="horizontal" flex="100%">
 					<html:div flex="20%">&subject.label;</html:div>
-				    <html:input id="msgSubject" type="text" flex="80%" onkeyup="SetComposeWindowTitle(event.which);"/>
+				    <html:input id="msgSubject" type="text" flex="80%"
+						onkeyup="SetComposeWindowTitle(event.which);"
+						onblur="ShouldITabIntoBody(0);"
+						/>
 				</box>
 			</box>
 		</box>