Use slightly dimmed text color for functional keys

This CL introduces two new key attributes to achieve this.
- KeyboardView.functionalTextColor
- followFunctionalTextColor flag for Key.keyLabelFlags

Bug: 14419121
Change-Id: I45ca433dcc9cc8c6cf891e21d5316ee4048b0cad

3 files changed, 10 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/keyboard/Key.java b/java/src/com/android/inputmethod/keyboard/Key.java
index 4c2250740..a1269c801 100644
--- a/java/src/com/android/inputmethod/keyboard/Key.java
+++ b/java/src/com/android/inputmethod/keyboard/Key.java
@@ -86,6 +86,7 @@ public class Key implements Comparable<Key> {
     private static final int LABEL_FLAGS_PRESERVE_CASE = 0x10000;
     private static final int LABEL_FLAGS_SHIFTED_LETTER_ACTIVATED = 0x20000;
     private static final int LABEL_FLAGS_FROM_CUSTOM_ACTION_LABEL = 0x40000;
+    private static final int LABEL_FLAGS_FOLLOW_FUNCTIONAL_TEXT_COLOR = 0x80000;
     private static final int LABEL_FLAGS_DISABLE_HINT_LABEL = 0x40000000;
     private static final int LABEL_FLAGS_DISABLE_ADDITIONAL_MORE_KEYS = 0x80000000;
 
@@ -583,6 +584,9 @@ public class Key implements Comparable<Key> {
     }
 
     public final int selectTextColor(final KeyDrawParams params) {
+        if ((mLabelFlags & LABEL_FLAGS_FOLLOW_FUNCTIONAL_TEXT_COLOR) != 0) {
+            return params.mFunctionalTextColor;
+        }
         return isShiftedLetterActivated() ? params.mTextInactivatedColor : params.mTextColor;
     }
 
diff --git a/java/src/com/android/inputmethod/keyboard/internal/KeyDrawParams.java b/java/src/com/android/inputmethod/keyboard/internal/KeyDrawParams.java
index 1716fa049..07ac06bab 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/KeyDrawParams.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/KeyDrawParams.java
@@ -35,6 +35,7 @@ public final class KeyDrawParams {
     public int mTextColor;
     public int mTextInactivatedColor;
     public int mTextShadowColor;
+    public int mFunctionalTextColor;
     public int mHintLetterColor;
     public int mHintLabelColor;
     public int mShiftedLetterHintInactivatedColor;
@@ -60,6 +61,7 @@ public final class KeyDrawParams {
         mTextColor = copyFrom.mTextColor;
         mTextInactivatedColor = copyFrom.mTextInactivatedColor;
         mTextShadowColor = copyFrom.mTextShadowColor;
+        mFunctionalTextColor = copyFrom.mFunctionalTextColor;
         mHintLetterColor = copyFrom.mHintLetterColor;
         mHintLabelColor = copyFrom.mHintLabelColor;
         mShiftedLetterHintInactivatedColor = copyFrom.mShiftedLetterHintInactivatedColor;
@@ -93,6 +95,7 @@ public final class KeyDrawParams {
         mTextColor = selectColor(attr.mTextColor, mTextColor);
         mTextInactivatedColor = selectColor(attr.mTextInactivatedColor, mTextInactivatedColor);
         mTextShadowColor = selectColor(attr.mTextShadowColor, mTextShadowColor);
+        mFunctionalTextColor = selectColor(attr.mFunctionalTextColor, mFunctionalTextColor);
         mHintLetterColor = selectColor(attr.mHintLetterColor, mHintLetterColor);
         mHintLabelColor = selectColor(attr.mHintLabelColor, mHintLabelColor);
         mShiftedLetterHintInactivatedColor = selectColor(
diff --git a/java/src/com/android/inputmethod/keyboard/internal/KeyVisualAttributes.java b/java/src/com/android/inputmethod/keyboard/internal/KeyVisualAttributes.java
index df386fce4..133462ac7 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/KeyVisualAttributes.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/KeyVisualAttributes.java
@@ -40,6 +40,7 @@ public final class KeyVisualAttributes {
     public final int mTextColor;
     public final int mTextInactivatedColor;
     public final int mTextShadowColor;
+    public final int mFunctionalTextColor;
     public final int mHintLetterColor;
     public final int mHintLabelColor;
     public final int mShiftedLetterHintInactivatedColor;
@@ -61,6 +62,7 @@ public final class KeyVisualAttributes {
         R.styleable.Keyboard_Key_keyTextColor,
         R.styleable.Keyboard_Key_keyTextInactivatedColor,
         R.styleable.Keyboard_Key_keyTextShadowColor,
+        R.styleable.Keyboard_Key_functionalTextColor,
         R.styleable.Keyboard_Key_keyHintLetterColor,
         R.styleable.Keyboard_Key_keyHintLabelColor,
         R.styleable.Keyboard_Key_keyShiftedLetterHintInactivatedColor,
@@ -122,6 +124,7 @@ public final class KeyVisualAttributes {
         mTextInactivatedColor = keyAttr.getColor(
                 R.styleable.Keyboard_Key_keyTextInactivatedColor, 0);
         mTextShadowColor = keyAttr.getColor(R.styleable.Keyboard_Key_keyTextShadowColor, 0);
+        mFunctionalTextColor = keyAttr.getColor(R.styleable.Keyboard_Key_functionalTextColor, 0);
         mHintLetterColor = keyAttr.getColor(R.styleable.Keyboard_Key_keyHintLetterColor, 0);
         mHintLabelColor = keyAttr.getColor(R.styleable.Keyboard_Key_keyHintLabelColor, 0);
         mShiftedLetterHintInactivatedColor = keyAttr.getColor(