Use left/right-edge popup preview background

Bug: 4902361
Change-Id: Iafbadd0e44c0db2fb6a0875c964304bec6ac8cb0

java/res/drawable/keyboard_key_feedback_left_ics.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2011 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.
+-->
+
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_long_pressable="true"
+            android:drawable="@drawable/keyboard_key_feedback_left_more_background_holo" />
+    <item android:drawable="@drawable/keyboard_key_feedback_left_background_holo" />
+</selector>

java/res/drawable/keyboard_key_feedback_right_ics.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2011 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.
+-->
+
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_long_pressable="true"
+            android:drawable="@drawable/keyboard_key_feedback_right_more_background_holo" />
+    <item android:drawable="@drawable/keyboard_key_feedback_right_background_holo" />
+</selector>

java/res/values/attrs.xml

@@ -68,6 +68,10 @@
         <attr name="keyPreviewLayout" format="reference" />
         <!-- The background for key press feedback. -->
         <attr name="keyPreviewBackground" format="reference" />
+        <!-- The background for the left edge key press feedback. -->
+        <attr name="keyPreviewLeftBackground" format="reference" />
+        <!-- The background for the right edge key press feedback. -->
+        <attr name="keyPreviewRightBackground" format="reference" />
         <!-- The background for spacebar press feedback. -->
         <attr name="keyPreviewSpacebarBackground" format="reference" />
         <!-- The text color for key press feedback. -->

java/res/values/styles.xml

@@ -51,6 +51,8 @@
         <item name="keyUppercaseLetterActivatedColor">#CCE0E4E5</item>
         <item name="keyPreviewLayout">@layout/key_preview</item>
         <item name="keyPreviewBackground">@drawable/keyboard_key_feedback</item>
+        <item name="keyPreviewLeftBackground">@null</item>
+        <item name="keyPreviewRightBackground">@null</item>
         <item name="keyPreviewSpacebarBackground">@drawable/keyboard_key_feedback</item>
         <item name="keyPreviewTextColor">#FFFFFFFF</item>
         <item name="keyPreviewOffset">@dimen/key_preview_offset</item>
@@ -152,6 +154,8 @@
         <item name="keyUppercaseLetterInactivatedColor">#66E0E4E5</item>
         <item name="keyUppercaseLetterActivatedColor">#FFFFFFFF</item>
         <item name="keyPreviewBackground">@drawable/keyboard_key_feedback_ics</item>
+        <item name="keyPreviewLeftBackground">@drawable/keyboard_key_feedback_left_ics</item>
+        <item name="keyPreviewRightBackground">@drawable/keyboard_key_feedback_right_ics</item>
         <item name="keyPreviewSpacebarBackground">@drawable/transparent</item>
         <item name="keyPreviewTextColor">#FFFFFFFF</item>
         <item name="keyPreviewHeight">@dimen/key_preview_height_ics</item>

java/src/com/android/inputmethod/keyboard/KeyboardView.java

@@ -118,6 +118,8 @@ public class KeyboardView extends View implements PointerTracker.UIProxy {
     private final float mKeyHysteresisDistance;
     private final float mVerticalCorrection;
     private final Drawable mPreviewBackground;
+    private final Drawable mPreviewLeftBackground;
+    private final Drawable mPreviewRightBackground;
     private final Drawable mPreviewSpacebarBackground;
     private final int mPreviewTextColor;
     private final float mPreviewTextRatio;
@@ -203,6 +205,9 @@ public class KeyboardView extends View implements PointerTracker.UIProxy {
     private static final String KEY_LABEL_REFERENCE_CHAR = "M";
     private final int mKeyLabelHorizontalPadding;
 
+    private static final int MEASURESPEC_UNSPECIFIED = MeasureSpec.makeMeasureSpec(
+            0, MeasureSpec.UNSPECIFIED);
+
     private final UIHandler mHandler = new UIHandler(this);
 
     public static class UIHandler extends StaticInnerHandlerWrapper<KeyboardView> {
@@ -354,6 +359,8 @@ public class KeyboardView extends View implements PointerTracker.UIProxy {
             mShowKeyPreviewPopup = false;
         }
         mPreviewBackground = a.getDrawable(R.styleable.KeyboardView_keyPreviewBackground);
+        mPreviewLeftBackground = a.getDrawable(R.styleable.KeyboardView_keyPreviewLeftBackground);
+        mPreviewRightBackground = a.getDrawable(R.styleable.KeyboardView_keyPreviewRightBackground);
         mPreviewSpacebarBackground = a.getDrawable(
                 R.styleable.KeyboardView_keyPreviewSpacebarBackground);
         mPreviewOffset = a.getDimensionPixelOffset(R.styleable.KeyboardView_keyPreviewOffset, 0);
@@ -1016,21 +1023,25 @@ public class KeyboardView extends View implements PointerTracker.UIProxy {
         } else {
             previewText.setBackgroundDrawable(mPreviewBackground);
         }
-        // Set the preview background state
-        previewText.getBackground().setState(
-                key.mPopupCharacters != null ? LONG_PRESSABLE_STATE_SET : EMPTY_STATE_SET);
 
-        previewText.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
+        previewText.measure(MEASURESPEC_UNSPECIFIED, MEASURESPEC_UNSPECIFIED);
-                MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
         final int previewWidth = Math.max(previewText.getMeasuredWidth(), keyDrawWidth
                 + previewText.getPaddingLeft() + previewText.getPaddingRight());
         final int previewHeight = mPreviewHeight;
         getLocationInWindow(mCoordinates);
-        final int previewX = keyDrawX - (previewWidth - keyDrawWidth) / 2 + mCoordinates[0];
+        int previewX = keyDrawX - (previewWidth - keyDrawWidth) / 2 + mCoordinates[0];
         final int previewY = key.mY - previewHeight + mCoordinates[1] + mPreviewOffset;
+        if (previewX < 0 && mPreviewLeftBackground != null) {
+            previewText.setBackgroundDrawable(mPreviewLeftBackground);
+            previewX = 0;
+        } else if (previewX + previewWidth > getWidth() && mPreviewRightBackground != null) {
+            previewText.setBackgroundDrawable(mPreviewRightBackground);
+            previewX = getWidth() - previewWidth;
+        }
 
-        // Place the key preview.
+        // Set the preview background state
-        // TODO: Adjust position of key previews which touch screen edges
+        previewText.getBackground().setState(
+                key.mPopupCharacters != null ? LONG_PRESSABLE_STATE_SET : EMPTY_STATE_SET);
         FrameLayoutCompatUtils.placeViewAt(
                 previewText, previewX, previewY, previewWidth, previewHeight);
         previewText.setVisibility(VISIBLE);
@@ -1147,7 +1158,7 @@ public class KeyboardView extends View implements PointerTracker.UIProxy {
         miniKeyboardView.setKeyboard(keyboard);
 
         container.measure(MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST),
-                MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
+                MEASURESPEC_UNSPECIFIED);
 
         return miniKeyboardView;
     }