Per-layout shift modmap

Specify the behavior of shift for a layout. This is intended for locales
that use the same alphabet but have different capital letters (eg.
Bengali).

The modmap is defined like this:

    <keyboard>
      <modmap>
        <shift a="a" b="A"/>
      </modmap>
    </keyboard>

srcs/juloo.keyboard2/Keyboard2View.java

@@ -123,6 +123,15 @@ public class Keyboard2View extends View
 
   public KeyValue modifyKey(KeyValue k, Pointers.Modifiers mods)
   {
+    if (_keyboard.modmap != null)
+    {
+      if (mods.has(KeyValue.Modifier.SHIFT))
+      {
+        KeyValue km = _keyboard.modmap.shift.get(k);
+        if (km != null)
+          return km;
+      }
+    }
     return KeyModifier.modify(k, mods);
   }
 
@@ -372,7 +381,7 @@ public class Keyboard2View extends View
 
   private void drawLabel(Canvas canvas, KeyValue kv, float x, float y, float keyH, boolean isKeyDown)
   {
-    kv = KeyModifier.modify(kv, _mods);
+    kv = modifyKey(kv, _mods);
     if (kv == null)
       return;
     float textSize = scaleTextSize(kv, _config.labelTextSize, keyH);
@@ -388,7 +397,7 @@ public class Keyboard2View extends View
   {
     Paint.Align a = LABEL_POSITION_H[sub_index];
     Vertical v = LABEL_POSITION_V[sub_index];
-    kv = KeyModifier.modify(kv, _mods);
+    kv = modifyKey(kv, _mods);
     if (kv == null)
       return;
     float textSize = scaleTextSize(kv, _config.sublabelTextSize, keyH);

srcs/juloo.keyboard2/KeyboardData.java

@@ -21,13 +21,15 @@ class KeyboardData
   public final float keysWidth;
   /** Total height of the keyboard. */
   public final float keysHeight;
+  /** Might be null. */
+  public final Modmap modmap;
 
   public KeyboardData mapKeys(MapKey f)
   {
     ArrayList<Row> rows_ = new ArrayList<Row>();
     for (Row r : rows)
       rows_.add(r.mapKeys(f));
-    return new KeyboardData(rows_, keysWidth);
+    return new KeyboardData(rows_, keysWidth, modmap);
   }
 
   /** Add keys from the given iterator into the keyboard. Extra keys are added
@@ -47,7 +49,7 @@ class KeyboardData
         for (int c = 1; c <= 4; c++)
           addExtraKeys_to_row(rows, k, r, c);
     }
-    return new KeyboardData(rows, keysWidth);
+    return new KeyboardData(rows, keysWidth, modmap);
   }
 
   public KeyboardData addNumPad()
@@ -70,14 +72,15 @@ class KeyboardData
       }
       extendedRows.add(new Row(keys, row.height, row.shift));
     }
-    return new KeyboardData(extendedRows, compute_max_width(extendedRows));
+    return new
+      KeyboardData(extendedRows, compute_max_width(extendedRows), modmap);
   }
 
   public KeyboardData addNumberRow()
   {
     ArrayList<Row> rows_ = new ArrayList<Row>(this.rows);
     rows_.add(0, number_row.updateWidth(keysWidth));
-    return new KeyboardData(rows_, keysWidth);
+    return new KeyboardData(rows_, keysWidth, modmap);
   }
 
   public Key findKeyWithValue(KeyValue kv)
@@ -173,12 +176,25 @@ class KeyboardData
     boolean add_bottom_row = attribute_bool(parser, "bottom_row", true);
     float specified_kw = attribute_float(parser, "width", 0f);
     ArrayList<Row> rows = new ArrayList<Row>();
-    while (expect_tag(parser, "row"))
+    Modmap modmap = null;
+    while (next_tag(parser))
+    {
+      switch (parser.getName())
+      {
+        case "row":
           rows.add(Row.parse(parser));
+          break;
+        case "modmap":
+          modmap = Modmap.parse(parser);
+          break;
+        default:
+          throw new Exception("Unknown tag: " + parser.getName());
+      }
+    }
     float kw = (specified_kw != 0f) ? specified_kw : compute_max_width(rows);
     if (add_bottom_row)
       rows.add(bottom_row.updateWidth(kw));
-    return new KeyboardData(rows, kw);
+    return new KeyboardData(rows, kw, modmap);
   }
 
   private static float compute_max_width(List<Row> rows)
@@ -196,12 +212,13 @@ class KeyboardData
     return Row.parse(parser);
   }
 
-  protected KeyboardData(List<Row> rows_, float kw)
+  protected KeyboardData(List<Row> rows_, float kw, Modmap mm)
   {
     float kh = 0.f;
     for (Row r : rows_)
       kh += r.height + r.shift;
     rows = rows_;
+    modmap = mm;
     keysWidth = kw;
     keysHeight = kh;
   }
@@ -415,10 +432,37 @@ class KeyboardData
     }
   }
 
+  public static class Modmap
+  {
+    public final Map<KeyValue, KeyValue> shift;
+
+    public Modmap(Map<KeyValue, KeyValue> s)
+    {
+      shift = s;
+    }
+
+    public static Modmap parse(XmlPullParser parser) throws Exception
+    {
+      HashMap<KeyValue, KeyValue> shift = new HashMap<KeyValue, KeyValue>();
+      while (expect_tag(parser, "shift"))
+        parse_mapping(parser, shift);
+      return new Modmap(shift);
+    }
+
+    private static void parse_mapping(XmlPullParser parser, Map<KeyValue, KeyValue> dst) throws Exception
+    {
+      KeyValue a = KeyValue.getKeyByName(parser.getAttributeValue(null, "a"));
+      KeyValue b = KeyValue.getKeyByName(parser.getAttributeValue(null, "b"));
+      while (parser.next() != XmlPullParser.END_TAG)
+        continue;
+      dst.put(a, b);
+    }
+  }
+
   /** Parsing utils */
 
   /** Returns [false] on [END_DOCUMENT] or [END_TAG], [true] otherwise. */
-  private static boolean expect_tag(XmlPullParser parser, String name) throws Exception
+  private static boolean next_tag(XmlPullParser parser) throws Exception
   {
     int status;
     do
@@ -428,8 +472,16 @@ class KeyboardData
         return false;
     }
     while (status != XmlPullParser.START_TAG);
+    return true;
+  }
+
+  /** Returns [false] on [END_DOCUMENT] or [END_TAG], [true] otherwise. */
+  private static boolean expect_tag(XmlPullParser parser, String name) throws Exception
+  {
+    if (!next_tag(parser))
+      return false;
     if (!parser.getName().equals(name))
-      throw new Exception("Unknow tag: " + parser.getName());
+      throw new Exception("Unknown tag: " + parser.getName());
     return true;
   }
 

srcs/juloo.keyboard2/Pointers.java

@@ -478,6 +478,10 @@ public final class Pointers implements Handler.Callback
 
     public KeyValue.Modifier get(int i) { return _mods[_size - 1 - i]; }
     public int size() { return _size; }
+    public boolean has(KeyValue.Modifier m)
+    {
+      return (Arrays.binarySearch(_mods, 0, _size, m) >= 0);
+    }
 
     @Override
     public int hashCode() { return Arrays.hashCode(_mods); }