Move keyboard related internal class to separate package

Change-Id: Ic1459066b865cde5104b3734193f76c997959c68

1 files changed, 159 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/keyboard/internal/SlidingLocaleDrawable.java b/java/src/com/android/inputmethod/keyboard/internal/SlidingLocaleDrawable.java
new file mode 100644
index 000000000..df4b575f1
--- /dev/null
+++ b/java/src/com/android/inputmethod/keyboard/internal/SlidingLocaleDrawable.java
@@ -0,0 +1,159 @@
+/*
+ * Copyright (C) 2010 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 android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.ColorFilter;
+import android.graphics.Paint;
+import android.graphics.Paint.Align;
+import android.graphics.PixelFormat;
+import android.graphics.drawable.Drawable;
+import android.text.TextPaint;
+import android.view.ViewConfiguration;
+
+import com.android.inputmethod.keyboard.Keyboard;
+import com.android.inputmethod.keyboard.LatinKeyboard;
+import com.android.inputmethod.latin.R;
+import com.android.inputmethod.latin.SubtypeSwitcher;
+
+/**
+ * Animation to be displayed on the spacebar preview popup when switching languages by swiping the
+ * spacebar. It draws the current, previous and next languages and moves them by the delta of touch
+ * movement on the spacebar.
+ */
+public class SlidingLocaleDrawable extends Drawable {
+    private static final int SLIDE_SPEED_MULTIPLIER_RATIO = 150;
+    private final int mWidth;
+    private final int mHeight;
+    private final Drawable mBackground;
+    private final int mSpacebarTextColor;
+    private final TextPaint mTextPaint;
+    private final int mMiddleX;
+    private final Drawable mLeftDrawable;
+    private final Drawable mRightDrawable;
+    private final int mThreshold;
+
+    private int mDiff;
+    private boolean mHitThreshold;
+    private String mCurrentLanguage;
+    private String mNextLanguage;
+    private String mPrevLanguage;
+
+    public SlidingLocaleDrawable(Context context, Drawable background, int width, int height) {
+        mBackground = background;
+        Keyboard.setDefaultBounds(mBackground);
+        mWidth = width;
+        mHeight = height;
+        final TextPaint textPaint = new TextPaint();
+        textPaint.setTextSize(LatinKeyboard.getTextSizeFromTheme(
+                context.getTheme(), android.R.style.TextAppearance_Medium, 18));
+        textPaint.setColor(Color.TRANSPARENT);
+        textPaint.setTextAlign(Align.CENTER);
+        textPaint.setAntiAlias(true);
+        mTextPaint = textPaint;
+        mMiddleX = (mWidth - mBackground.getIntrinsicWidth()) / 2;
+
+        final TypedArray a = context.obtainStyledAttributes(
+                null, R.styleable.LatinKeyboard, R.attr.latinKeyboardStyle, R.style.LatinKeyboard);
+        mSpacebarTextColor = a.getColor(R.styleable.LatinKeyboard_spacebarTextColor, 0);
+        mLeftDrawable = a.getDrawable(R.styleable.LatinKeyboard_spacebarArrowPreviewLeftIcon);
+        mRightDrawable = a.getDrawable(R.styleable.LatinKeyboard_spacebarArrowPreviewRightIcon);
+        a.recycle();
+
+        mThreshold = ViewConfiguration.get(context).getScaledTouchSlop();
+    }
+
+    public void setDiff(int diff) {
+        if (diff == Integer.MAX_VALUE) {
+            mHitThreshold = false;
+            mCurrentLanguage = null;
+            return;
+        }
+        mDiff = Math.max(diff, diff * SLIDE_SPEED_MULTIPLIER_RATIO / 100);
+        if (mDiff > mWidth) mDiff = mWidth;
+        if (mDiff < -mWidth) mDiff = -mWidth;
+        if (Math.abs(mDiff) > mThreshold) mHitThreshold = true;
+        invalidateSelf();
+    }
+
+
+    @Override
+    public void draw(Canvas canvas) {
+        canvas.save();
+        if (mHitThreshold) {
+            Paint paint = mTextPaint;
+            final int width = mWidth;
+            final int height = mHeight;
+            final int diff = mDiff;
+            final Drawable lArrow = mLeftDrawable;
+            final Drawable rArrow = mRightDrawable;
+            canvas.clipRect(0, 0, width, height);
+            if (mCurrentLanguage == null) {
+                SubtypeSwitcher subtypeSwitcher = SubtypeSwitcher.getInstance();
+                mCurrentLanguage = subtypeSwitcher.getInputLanguageName();
+                mNextLanguage = subtypeSwitcher.getNextInputLanguageName();
+                mPrevLanguage = subtypeSwitcher.getPreviousInputLanguageName();
+            }
+            // Draw language text with shadow
+            final float baseline = mHeight * LatinKeyboard.SPACEBAR_LANGUAGE_BASELINE
+                    - paint.descent();
+            paint.setColor(mSpacebarTextColor);
+            canvas.drawText(mCurrentLanguage, width / 2 + diff, baseline, paint);
+            canvas.drawText(mNextLanguage, diff - width / 2, baseline, paint);
+            canvas.drawText(mPrevLanguage, diff + width + width / 2, baseline, paint);
+
+            Keyboard.setDefaultBounds(lArrow);
+            rArrow.setBounds(width - rArrow.getIntrinsicWidth(), 0, width,
+                    rArrow.getIntrinsicHeight());
+            lArrow.draw(canvas);
+            rArrow.draw(canvas);
+        }
+        if (mBackground != null) {
+            canvas.translate(mMiddleX, 0);
+            mBackground.draw(canvas);
+        }
+        canvas.restore();
+    }
+
+    @Override
+    public int getOpacity() {
+        return PixelFormat.TRANSLUCENT;
+    }
+
+    @Override
+    public void setAlpha(int alpha) {
+        // Ignore
+    }
+
+    @Override
+    public void setColorFilter(ColorFilter cf) {
+        // Ignore
+    }
+
+    @Override
+    public int getIntrinsicWidth() {
+        return mWidth;
+    }
+
+    @Override
+    public int getIntrinsicHeight() {
+        return mHeight;
+    }
+}