Move TypefaceUtils and ViewUtils to utils package

Change-Id: Iccd47c27670248c43de9a539c1951111d7733111

2 files changed, 143 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/utils/TypefaceUtils.java b/java/src/com/android/inputmethod/latin/utils/TypefaceUtils.java
new file mode 100644
index 000000000..544e4d201
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/utils/TypefaceUtils.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2013 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.latin.utils;
+
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.graphics.Typeface;
+import android.util.SparseArray;
+
+public final class TypefaceUtils {
+    private TypefaceUtils() {
+        // This utility class is not publicly instantiable.
+    }
+
+    // This sparse array caches key label text height in pixel indexed by key label text size.
+    private static final SparseArray<Float> sTextHeightCache = CollectionUtils.newSparseArray();
+    // Working variable for the following method.
+    private static final Rect sTextHeightBounds = new Rect();
+
+    public static float getCharHeight(final char[] referenceChar, final Paint paint) {
+        final int key = getCharGeometryCacheKey(referenceChar[0], paint);
+        synchronized (sTextHeightCache) {
+            final Float cachedValue = sTextHeightCache.get(key);
+            if (cachedValue != null) {
+                return cachedValue;
+            }
+
+            paint.getTextBounds(referenceChar, 0, 1, sTextHeightBounds);
+            final float height = sTextHeightBounds.height();
+            sTextHeightCache.put(key, height);
+            return height;
+        }
+    }
+
+    // This sparse array caches key label text width in pixel indexed by key label text size.
+    private static final SparseArray<Float> sTextWidthCache = CollectionUtils.newSparseArray();
+    // Working variable for the following method.
+    private static final Rect sTextWidthBounds = new Rect();
+
+    public static float getCharWidth(final char[] referenceChar, final Paint paint) {
+        final int key = getCharGeometryCacheKey(referenceChar[0], paint);
+        synchronized (sTextWidthCache) {
+            final Float cachedValue = sTextWidthCache.get(key);
+            if (cachedValue != null) {
+                return cachedValue;
+            }
+
+            paint.getTextBounds(referenceChar, 0, 1, sTextWidthBounds);
+            final float width = sTextWidthBounds.width();
+            sTextWidthCache.put(key, width);
+            return width;
+        }
+    }
+
+    private static int getCharGeometryCacheKey(final char referenceChar, final Paint paint) {
+        final int labelSize = (int)paint.getTextSize();
+        final Typeface face = paint.getTypeface();
+        final int codePointOffset = referenceChar << 15;
+        if (face == Typeface.DEFAULT) {
+            return codePointOffset + labelSize;
+        } else if (face == Typeface.DEFAULT_BOLD) {
+            return codePointOffset + labelSize + 0x1000;
+        } else if (face == Typeface.MONOSPACE) {
+            return codePointOffset + labelSize + 0x2000;
+        } else {
+            return codePointOffset + labelSize;
+        }
+    }
+
+    public static float getLabelWidth(final String label, final Paint paint) {
+        final Rect textBounds = new Rect();
+        paint.getTextBounds(label, 0, label.length(), textBounds);
+        return textBounds.width();
+    }
+}
diff --git a/java/src/com/android/inputmethod/latin/utils/ViewLayoutUtils.java b/java/src/com/android/inputmethod/latin/utils/ViewLayoutUtils.java
new file mode 100644
index 000000000..f9d853493
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/utils/ViewLayoutUtils.java
@@ -0,0 +1,54 @@
+/*
+ * 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.
+ */
+
+package com.android.inputmethod.latin.utils;
+
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewGroup.MarginLayoutParams;
+import android.widget.FrameLayout;
+import android.widget.RelativeLayout;
+
+public final class ViewLayoutUtils {
+    private ViewLayoutUtils() {
+        // This utility class is not publicly instantiable.
+    }
+
+    public static MarginLayoutParams newLayoutParam(final ViewGroup placer, final int width,
+            final int height) {
+        if (placer instanceof FrameLayout) {
+            return new FrameLayout.LayoutParams(width, height);
+        } else if (placer instanceof RelativeLayout) {
+            return new RelativeLayout.LayoutParams(width, height);
+        } else if (placer == null) {
+            throw new NullPointerException("placer is null");
+        } else {
+            throw new IllegalArgumentException("placer is neither FrameLayout nor RelativeLayout: "
+                    + placer.getClass().getName());
+        }
+    }
+
+    public static void placeViewAt(final View view, final int x, final int y, final int w,
+            final int h) {
+        final ViewGroup.LayoutParams lp = view.getLayoutParams();
+        if (lp instanceof MarginLayoutParams) {
+            final MarginLayoutParams marginLayoutParams = (MarginLayoutParams)lp;
+            marginLayoutParams.width = w;
+            marginLayoutParams.height = h;
+            marginLayoutParams.setMargins(x, y, 0, 0);
+        }
+    }
+}