Add GridRows tag to support emoji keyboard

Bug: 6370846
Change-Id: Ia68284b2402e52d835040da900a51cca669add2f

1 files changed, 85 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/keyboard/internal/CodesArrayParser.java b/java/src/com/android/inputmethod/keyboard/internal/CodesArrayParser.java
new file mode 100644
index 000000000..c10fdbace
--- /dev/null
+++ b/java/src/com/android/inputmethod/keyboard/internal/CodesArrayParser.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.keyboard.internal;
+
+import com.android.inputmethod.latin.Constants;
+
+/**
+ * The string parser of codesArray specification for <GridRows />. The attribute codesArray is an
+ * array of string.
+ * Each element of the array defines a key label by specifying a code point as a hexadecimal string.
+ * A key label may consist of multiple code points separated by comma.
+ * Each element of the array optionally can have an output text definition after vertical bar
+ * marker. An output text may consist of multiple code points separated by comma.
+ * The format of the codesArray element should be:
+ * <pre>
+ *   codePointInHex[,codePoint2InHex]*(|outputTextCodePointInHex[,outputTextCodePoint2InHex]*)?
+ * </pre>
+ */
+// TODO: Write unit tests for this class.
+public final class CodesArrayParser {
+    // Constants for parsing.
+    private static final char COMMA = ',';
+    private static final char VERTICAL_BAR = '|';
+    private static final String COMMA_STRING = ",";
+    private static final int BASE_HEX = 16;
+
+    private CodesArrayParser() {
+     // This utility class is not publicly instantiable.
+    }
+
+    private static String getLabelSpec(final String codesArraySpec) {
+        final int pos = codesArraySpec.indexOf(VERTICAL_BAR);
+        return (pos < 0) ? codesArraySpec : codesArraySpec.substring(0, pos);
+    }
+
+    public static String parseLabel(final String codesArraySpec) {
+        final String labelSpec = getLabelSpec(codesArraySpec);
+        final StringBuilder sb = new StringBuilder();
+        for (final String codeInHex : labelSpec.split(COMMA_STRING)) {
+            final int codePoint = Integer.parseInt(codeInHex, BASE_HEX);
+            sb.appendCodePoint(codePoint);
+        }
+        return sb.toString();
+    }
+
+    private static String getCodeSpec(final String codesArraySpec) {
+        final int pos = codesArraySpec.indexOf(VERTICAL_BAR);
+        return (pos < 0) ? codesArraySpec : codesArraySpec.substring(pos + 1);
+    }
+
+    public static int parseCode(final String codesArraySpec) {
+        final String codeSpec = getCodeSpec(codesArraySpec);
+        if (codeSpec.indexOf(COMMA) < 0) {
+            return Integer.parseInt(codeSpec, BASE_HEX);
+        }
+        return Constants.CODE_OUTPUT_TEXT;
+    }
+
+    public static String parseOutputText(final String codesArraySpec) {
+        final String codeSpec = getCodeSpec(codesArraySpec);
+        if (codeSpec.indexOf(COMMA) < 0) {
+            return null;
+        }
+        final StringBuilder sb = new StringBuilder();
+        for (final String codeInHex : codeSpec.split(COMMA_STRING)) {
+            final int codePoint = Integer.parseInt(codeInHex, BASE_HEX);
+            sb.appendCodePoint(codePoint);
+        }
+        return sb.toString();
+    }
+}