1 files changed, 72 insertions, 8 deletions

diff --git a/java/src/com/android/inputmethod/latin/Utils.java b/java/src/com/android/inputmethod/latin/Utils.java
index 8e0cfa122..bc8a1301c 100644
--- a/java/src/com/android/inputmethod/latin/Utils.java
+++ b/java/src/com/android/inputmethod/latin/Utils.java
@@ -16,14 +16,6 @@
 
 package com.android.inputmethod.latin;
 
-import com.android.inputmethod.compat.InputMethodInfoCompatWrapper;
-import com.android.inputmethod.compat.InputMethodManagerCompatWrapper;
-import com.android.inputmethod.compat.InputMethodSubtypeCompatWrapper;
-import com.android.inputmethod.compat.InputTypeCompatUtils;
-import com.android.inputmethod.keyboard.Keyboard;
-import com.android.inputmethod.keyboard.KeyboardId;
-import com.android.inputmethod.latin.define.JniLibName;
-
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
@@ -41,6 +33,14 @@ import android.text.format.DateUtils;
 import android.util.Log;
 import android.view.inputmethod.EditorInfo;
 
+import com.android.inputmethod.compat.InputMethodInfoCompatWrapper;
+import com.android.inputmethod.compat.InputMethodManagerCompatWrapper;
+import com.android.inputmethod.compat.InputMethodSubtypeCompatWrapper;
+import com.android.inputmethod.compat.InputTypeCompatUtils;
+import com.android.inputmethod.keyboard.Keyboard;
+import com.android.inputmethod.keyboard.KeyboardId;
+import com.android.inputmethod.latin.define.JniLibName;
+
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileInputStream;
@@ -62,6 +62,12 @@ public class Utils {
     private static boolean DBG = LatinImeLogger.sDBG;
     private static boolean DBG_EDIT_DISTANCE = false;
 
+    // Constants for resource name parsing.
+    public static final char ESCAPE_CHAR = '\\';
+    public static final char PREFIX_AT = '@';
+    public static final char SUFFIX_SLASH = '/';
+    private static final String PREFIX_STRING = PREFIX_AT + "string";
+
     private Utils() {
         // Intentional empty constructor for utility class.
     }
@@ -793,4 +799,62 @@ public class Utils {
             LatinImeLogger.logOnAutoCorrectionCancelled();
         }
     }
+
+    public static int getResourceId(Resources res, String name, int packageNameResId) {
+        String packageName = res.getResourcePackageName(packageNameResId);
+        int resId = res.getIdentifier(name, null, packageName);
+        if (resId == 0) {
+            throw new RuntimeException("Unknown resource: " + name);
+        }
+        return resId;
+    }
+
+    public static String resolveStringResource(String text, Resources res, int packageNameResId) {
+        final int size = text.length();
+        if (size < PREFIX_STRING.length()) {
+            return text;
+        }
+
+        StringBuilder sb = null;
+        for (int pos = 0; pos < size; pos++) {
+            final char c = text.charAt(pos);
+            if (c == PREFIX_AT && text.startsWith(PREFIX_STRING, pos)) {
+                if (sb == null) {
+                    sb = new StringBuilder(text.substring(0, pos));
+                }
+                final int end = Utils.searchResourceNameEnd(text, pos + PREFIX_STRING.length());
+                final String resName = text.substring(pos + 1, end);
+                final int resId = getResourceId(res, resName, packageNameResId);
+                sb.append(res.getString(resId));
+                pos = end - 1;
+            } else if (c == ESCAPE_CHAR) {
+                pos++;
+                if (sb != null) {
+                    sb.append(c);
+                    if (pos < size) {
+                        sb.append(text.charAt(pos));
+                    }
+                }
+            } else if (sb != null) {
+                sb.append(c);
+            }
+        }
+        return (sb == null) ? text : sb.toString();
+    }
+
+    private static int searchResourceNameEnd(String text, int start) {
+        final int size = text.length();
+        if (start >= size || text.charAt(start) != SUFFIX_SLASH) {
+            throw new RuntimeException("Resource name not specified");
+        }
+        for (int pos = start + 1; pos < size; pos++) {
+            final char c = text.charAt(pos);
+            // String resource name should be consisted of [a-z_0-9].
+            if ((c >= 'a' && c <= 'z') || c == '_' || (c >= '0' && c <= '9')) {
+                continue;
+            }
+            return pos;
+        }
+        return size;
+    }
 }