Initial split QWERTY layout

Change [2/3]

Add an attribute that's used in layout xmls for specifying
the split-keyboard layout.
This attribute will be checked/set by the KeyboardBuilder which knows about
the "splittability" of the keyboard.

Bug: 4968173
Change-Id: I5d792e570b9648e09022e9b7e92a972a161009ee
diff --git a/java/res/xml-sw600dp/rows_qwerty.xml b/java/res/xml-sw600dp/rows_qwerty.xml
index 58ba1d7..51df4b0 100644
--- a/java/res/xml-sw600dp/rows_qwerty.xml
+++ b/java/res/xml-sw600dp/rows_qwerty.xml
@@ -23,39 +23,114 @@
 >
     <include
         latin:keyboardLayout="@xml/key_styles_common" />
-    <Row
-        latin:keyWidth="9.0%p"
-    >
-        <include
-            latin:keyboardLayout="@xml/rowkeys_qwerty1" />
-        <Key
-            latin:keyStyle="deleteKeyStyle"
-            latin:keyWidth="fillRight" />
+    <!-- TODO: Consolidate the layout specification between protrait and landscape.
+         Ideally just the keyWidth should be different and the spacer should adjust to fill
+         the available space. -->
+    <!-- First row -->
+    <Row>
+        <switch>
+            <!-- Split keyboard layout for the first row -->
+            <case
+                latin:isSplitLayout="true"
+            >
+                <include
+                    latin:keyboardLayout="@xml/rowkeys_qwerty1_left5"
+                    latin:keyWidth="8.0%p" />
+                <Spacer
+                    latin:keyWidth="10.0%p" />
+                <include
+                    latin:keyboardLayout="@xml/rowkeys_qwerty1_right5"
+                    latin:keyWidth="8.0%p" />
+                <Key
+                    latin:keyStyle="deleteKeyStyle"
+                    latin:keyWidth="10.0%p" />
+            </case>
+            <!-- Regular layout for the first row -->
+            <default>
+                <include
+                    latin:keyboardLayout="@xml/rowkeys_qwerty1"
+                    latin:keyWidth="9.0%p" />
+                <Key
+                    latin:keyStyle="deleteKeyStyle"
+                    latin:keyWidth="fillRight" />
+            </default>
+        </switch>
     </Row>
-    <Row
-        latin:keyWidth="9.0%p"
-    >
-        <include
-            latin:keyboardLayout="@xml/rowkeys_qwerty2"
-            latin:keyXPos="4.5%p" />
-        <Key
-            latin:keyStyle="enterKeyStyle"
-            latin:keyWidth="fillRight" />
+    <!-- Second row -->
+    <Row>
+        <switch>
+            <!-- Split keyboard layout for the second row -->
+            <case
+                latin:isSplitLayout="true"
+            >
+                <include
+                    latin:keyboardLayout="@xml/rowkeys_qwerty2_left5"
+                    latin:keyXPos="4.0%p"
+                    latin:keyWidth="8.0%p" />
+                <Spacer
+                    latin:keyWidth="14.0%p" />
+                <include
+                    latin:keyboardLayout="@xml/rowkeys_qwerty2_right4"
+                    latin:keyWidth="8.0%p" />
+                <Key
+                    latin:keyStyle="enterKeyStyle"
+                    latin:keyWidth="10.0%p" />
+            </case>
+            <!-- Regular layout for the second row -->
+            <default>
+                <include
+                    latin:keyboardLayout="@xml/rowkeys_qwerty2"
+                    latin:keyXPos="4.5%p"
+                    latin:keyWidth="9.0%p" />
+                <Key
+                    latin:keyStyle="enterKeyStyle"
+                    latin:keyWidth="fillRight" />
+            </default>
+        </switch>
     </Row>
-    <Row
-        latin:keyWidth="9.0%p"
-    >
-        <Key
-            latin:keyStyle="shiftKeyStyle"
-            latin:keyWidth="10.0%p" />
-        <include
-            latin:keyboardLayout="@xml/rowkeys_qwerty3" />
-        <include
-            latin:keyboardLayout="@xml/keys_exclamation_question" />
-        <Key
-            latin:keyStyle="shiftKeyStyle"
-            latin:keyWidth="fillRight" />
+    <!-- Third row -->
+    <Row>
+        <switch>
+            <!-- Split keyboard layout for the third row -->
+            <case
+                latin:isSplitLayout="true"
+            >
+                <Key
+                    latin:keyStyle="shiftKeyStyle"
+                    latin:keyWidth="10.0%p" />
+                <include
+                    latin:keyboardLayout="@xml/rowkeys_qwerty3_left4"
+                    latin:keyWidth="8.0%p" />
+                <Spacer
+                    latin:keyWidth="8.0%p" />
+                <include
+                    latin:keyboardLayout="@xml/rowkeys_qwerty3_right3"
+                    latin:keyWidth="8.0%p" />
+                <include
+                    latin:keyboardLayout="@xml/keys_exclamation_question"
+                    latin:keyWidth="8.0%p" />
+                <Key
+                    latin:keyStyle="shiftKeyStyle"
+                    latin:keyWidth="10.0%p" />
+            </case>
+            <!-- Regular layout for the third row -->
+            <default>
+                <Key
+                    latin:keyStyle="shiftKeyStyle"
+                    latin:keyWidth="10.0%p" />
+                <include
+                    latin:keyboardLayout="@xml/rowkeys_qwerty3"
+                    latin:keyWidth="9.0%p" />
+                <include
+                    latin:keyboardLayout="@xml/keys_exclamation_question"
+                    latin:keyWidth="9.0%p" />
+                <Key
+                    latin:keyStyle="shiftKeyStyle"
+                    latin:keyWidth="fillRight" />
+            </default>
+        </switch>
     </Row>
+    <!-- Fourth row -->
     <include
         latin:keyboardLayout="@xml/row_qwerty4" />
 </merge>