add mapsforge-map android part to VectorTileMap

src/org/mapsforge/android/rendertheme/renderinstruction/Caption.java

@@ -0,0 +1,143 @@
+/*
+ * Copyright 2010, 2011, 2012 mapsforge.org
+ *
+ * This program is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.mapsforge.android.rendertheme.renderinstruction;
+
+import java.util.Locale;
+
+import org.mapsforge.android.rendertheme.RenderCallback;
+import org.mapsforge.android.rendertheme.RenderThemeHandler;
+import org.mapsforge.core.Tag;
+import org.xml.sax.Attributes;
+
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Paint.Align;
+import android.graphics.Paint.Style;
+import android.graphics.Typeface;
+
+/**
+ * Represents a text label on the map.
+ */
+public final class Caption implements RenderInstruction {
+	/**
+	 * @param elementName
+	 *            the name of the XML element.
+	 * @param attributes
+	 *            the attributes of the XML element.
+	 * @return a new Caption with the given rendering attributes.
+	 */
+	public static Caption create(String elementName, Attributes attributes) {
+		String textKey = null;
+		float dy = 0;
+		FontFamily fontFamily = FontFamily.DEFAULT;
+		FontStyle fontStyle = FontStyle.NORMAL;
+		float fontSize = 0;
+		int fill = Color.BLACK;
+		int stroke = Color.BLACK;
+		float strokeWidth = 0;
+
+		for (int i = 0; i < attributes.getLength(); ++i) {
+			String name = attributes.getLocalName(i);
+			String value = attributes.getValue(i);
+
+			if ("k".equals(name)) {
+				textKey = TextKey.getInstance(value);
+			} else if ("dy".equals(name)) {
+				dy = Float.parseFloat(value);
+			} else if ("font-family".equals(name)) {
+				fontFamily = FontFamily.valueOf(value.toUpperCase(Locale.ENGLISH));
+			} else if ("font-style".equals(name)) {
+				fontStyle = FontStyle.valueOf(value.toUpperCase(Locale.ENGLISH));
+			} else if ("font-size".equals(name)) {
+				fontSize = Float.parseFloat(value);
+			} else if ("fill".equals(name)) {
+				fill = Color.parseColor(value);
+			} else if ("stroke".equals(name)) {
+				stroke = Color.parseColor(value);
+			} else if ("stroke-width".equals(name)) {
+				strokeWidth = Float.parseFloat(value);
+			} else {
+				RenderThemeHandler.logUnknownAttribute(elementName, name, value, i);
+			}
+		}
+
+		validate(elementName, textKey, fontSize, strokeWidth);
+		Typeface typeface = Typeface.create(fontFamily.toTypeface(), fontStyle.toInt());
+		return new Caption(textKey, dy, typeface, fontSize, fill, stroke, strokeWidth);
+	}
+
+	private static void validate(String elementName, String textKey, float fontSize, float strokeWidth) {
+		if (textKey == null) {
+			throw new IllegalArgumentException("missing attribute k for element: " + elementName);
+		} else if (fontSize < 0) {
+			throw new IllegalArgumentException("font-size must not be negative: " + fontSize);
+		} else if (strokeWidth < 0) {
+			throw new IllegalArgumentException("stroke-width must not be negative: " + strokeWidth);
+		}
+	}
+
+	private final float mDy;
+	private final float mFontSize;
+	private final Paint mPaint;
+	private final Paint mStroke;
+	private final String mTextKey;
+
+	private Caption(String textKey, float dy, Typeface typeface, float fontSize, int fill, int stroke, float strokeWidth) {
+		super();
+
+		mTextKey = textKey;
+		mDy = dy;
+
+		mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+		mPaint.setTextAlign(Align.LEFT);
+		mPaint.setTypeface(typeface);
+		mPaint.setColor(fill);
+
+		mStroke = new Paint(Paint.ANTI_ALIAS_FLAG);
+		mStroke.setStyle(Style.STROKE);
+		mStroke.setTextAlign(Align.LEFT);
+		mStroke.setTypeface(typeface);
+		mStroke.setColor(stroke);
+		mStroke.setStrokeWidth(strokeWidth);
+
+		mFontSize = fontSize;
+	}
+
+	@Override
+	public void destroy() {
+		// do nothing
+	}
+
+	@Override
+	public void renderNode(RenderCallback renderCallback, Tag[] tags) {
+		renderCallback.renderPointOfInterestCaption(mTextKey, mDy, mPaint, mStroke);
+	}
+
+	@Override
+	public void renderWay(RenderCallback renderCallback, Tag[] tags) {
+		renderCallback.renderAreaCaption(mTextKey, mDy, mPaint, mStroke);
+	}
+
+	@Override
+	public void scaleStrokeWidth(float scaleFactor) {
+		// do nothing
+	}
+
+	@Override
+	public void scaleTextSize(float scaleFactor) {
+		mPaint.setTextSize(mFontSize * scaleFactor);
+		mStroke.setTextSize(mFontSize * scaleFactor);
+	}
+}