fix build, adding missing file :(

1 files changed, 165 insertions, 0 deletions

diff --git a/src/com/android/launcher2/CachedTextView.java b/src/com/android/launcher2/CachedTextView.java
new file mode 100644
index 000000000..eaa6636e6
--- /dev/null
+++ b/src/com/android/launcher2/CachedTextView.java
@@ -0,0 +1,165 @@
+/*
+ * 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.launcher2;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Bitmap.Config;
+import android.graphics.PorterDuff.Mode;
+import android.text.Layout;
+import android.util.AttributeSet;
+import android.widget.TextView;
+
+/*
+ * This class is a bit of a hack, designed to speed up long text labels in Launcher. It caches the
+ * text in a TextView to a bitmap and then just draws that Bitmap instead afterward, speeding up
+ * rendering. Marquee scrolling is not currently supported.
+ *
+ */
+public class CachedTextView extends TextView {
+    private Bitmap mCache;
+    private final Paint mCachePaint = new Paint();
+    private final Canvas mCacheCanvas = new Canvas();
+
+    private int mPrevAlpha = -1;
+    private boolean mIsBuildingCache;
+    boolean mIsTextCacheDirty;
+    float mTextCacheLeft;
+    float mTextCacheTop;
+    float mTextCacheScrollX;
+    float mRectLeft, mRectTop;
+    private float mPaddingH = 0;
+    private float mPaddingV = 0;
+    private CharSequence mText;
+
+    public CachedTextView(Context context) {
+        super(context);
+    }
+
+    public CachedTextView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public CachedTextView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    protected int getCacheTopPadding() {
+        return 0;
+    }
+    protected int getCacheLeftPadding() {
+        return 0;
+    }
+    protected int getCacheRightPadding() {
+        return 0;
+    }
+    protected int getCacheBottomPadding() {
+        return 0;
+    }
+
+    public void setText(CharSequence text, BufferType type) {
+        super.setText(text, type);
+        mIsTextCacheDirty = true;
+    }
+
+    private void buildAndUpdateCache() {
+        final Layout layout = getLayout();
+        final int left = getCompoundPaddingLeft();
+        final int top = getExtendedPaddingTop();
+        final float prevAlpha = getAlpha();
+
+        mTextCacheLeft = layout.getLineLeft(0) - getCacheLeftPadding();
+        mTextCacheTop = top + layout.getLineTop(0) - mPaddingV - getCacheTopPadding();
+
+        mRectLeft = mScrollX + getLeft();
+        mRectTop = 0;
+        mTextCacheScrollX = mScrollX;
+
+        final float textCacheRight =
+            Math.min(left + layout.getLineRight(0) + mPaddingH, mScrollX + mRight - mLeft) +
+            getCacheRightPadding();
+        final float textCacheBottom = top + layout.getLineBottom(0) + mPaddingV +
+            getCacheBottomPadding();
+        final float xCharWidth = getPaint().measureText("x");
+
+        int width = (int) (textCacheRight - mTextCacheLeft + (2 * xCharWidth));
+        int height = (int) (textCacheBottom - mTextCacheTop);
+
+        if (width != 0 && height != 0) {
+            if (mCache != null) {
+                if (mCache.getWidth() != width || mCache.getHeight() != height) {
+                    mCache.recycle();
+                    mCache = null;
+                }
+            }
+            if (mCache == null) {
+                mCache = Bitmap.createBitmap(width, height, Config.ARGB_8888);
+                mCacheCanvas.setBitmap(mCache);
+            } else {
+                mCacheCanvas.drawColor(0, Mode.CLEAR);
+            }
+
+            mCacheCanvas.save();
+            mCacheCanvas.translate(-mTextCacheLeft, -mTextCacheTop);
+
+            mIsBuildingCache = true;
+            setAlpha(1.0f);
+            draw(mCacheCanvas);
+            setAlpha(prevAlpha);
+            mIsBuildingCache = false;
+            mCacheCanvas.restore();
+
+            // A hack-- we set the text to be one space (we don't make it empty just to avoid any
+            // potential issues with text measurement, like line height, etc.) so that the text view
+            // doesn't draw it anymore, since it's been cached.
+            mText = getText();
+            setText(" ");
+        }
+    }
+
+    public CharSequence getText() {
+        return (mText == null) ? super.getText() : mText;
+    }
+
+    public void draw(Canvas canvas) {
+        if (mIsTextCacheDirty && !mIsBuildingCache) {
+            buildAndUpdateCache();
+            mIsTextCacheDirty = false;
+        }
+        if (mCache != null && !mIsBuildingCache) {
+            canvas.drawBitmap(mCache, mTextCacheLeft - mTextCacheScrollX + mScrollX,
+                    mTextCacheTop, mCachePaint);
+        }
+        super.draw(canvas);
+    }
+
+    protected boolean isBuildingCache() {
+        return mIsBuildingCache;
+    }
+
+    @Override
+    protected boolean onSetAlpha(int alpha) {
+        if (mPrevAlpha != alpha) {
+            mPrevAlpha = alpha;
+            mCachePaint.setAlpha(alpha);
+            super.onSetAlpha(alpha);
+        }
+        return true;
+    }
+}