svg1.2: support attribute text-align="center" in SVG 1.2 flow elements.

Closes #33

echosvg-bridge/src/main/java/io/sf/carte/echosvg/bridge/svg12/SVGFlowRootElementBridge.java

@@ -61,6 +61,7 @@
 import io.sf.carte.echosvg.css.engine.value.ComputedValue;
 import io.sf.carte.echosvg.css.engine.value.Value;
 import io.sf.carte.echosvg.css.engine.value.ValueConstants;
+import io.sf.carte.echosvg.css.engine.value.svg.SVGValueConstants;
 import io.sf.carte.echosvg.css.engine.value.svg12.LineHeightValue;
 import io.sf.carte.echosvg.css.engine.value.svg12.SVG12ValueConstants;
 import io.sf.carte.echosvg.dom.AbstractNode;
@@ -855,7 +856,7 @@ public BlockInfo makeBlockInfo(BridgeContext ctx, Element element) {
 		int textAlign;
 		if (v == SVG12ValueConstants.START_VALUE)
 			textAlign = BlockInfo.ALIGN_START;
-		else if (v == SVG12ValueConstants.MIDDLE_VALUE)
+		else if (v == SVG12ValueConstants.CENTER_VALUE || v == SVGValueConstants.MIDDLE_VALUE)
 			textAlign = BlockInfo.ALIGN_MIDDLE;
 		else if (v == SVG12ValueConstants.END_VALUE)
 			textAlign = BlockInfo.ALIGN_END;

echosvg-css/src/main/java/io/sf/carte/echosvg/css/engine/value/svg12/SVG12ValueConstants.java

@@ -24,6 +24,7 @@
 import io.sf.carte.echosvg.css.engine.value.StringValue;
 import io.sf.carte.echosvg.css.engine.value.Value;
 import io.sf.carte.echosvg.css.engine.value.svg.SVGValueConstants;
+import io.sf.carte.echosvg.util.CSSConstants;
 import io.sf.carte.echosvg.util.SVG12CSSConstants;
 
 /**
@@ -37,8 +38,8 @@ public interface SVG12ValueConstants extends SVGValueConstants {
 
 	/** The 'start' keyword. */
 	Value START_VALUE = new StringValue(CSSPrimitiveValue.CSS_IDENT, SVG12CSSConstants.CSS_FULL_VALUE);
-	/** The 'middle' keyword. */
-	Value MIDDLE_VALUE = new StringValue(CSSPrimitiveValue.CSS_IDENT, SVG12CSSConstants.CSS_MIDDLE_VALUE);
+	/** The 'center' keyword. */
+	Value CENTER_VALUE = new StringValue(CSSPrimitiveValue.CSS_IDENT, CSSConstants.CSS_CENTER_VALUE);
 	/** The 'end' keyword. */
 	Value END_VALUE = new StringValue(CSSPrimitiveValue.CSS_IDENT, SVG12CSSConstants.CSS_END_VALUE);
 	/** The 'full' keyword. */

echosvg-css/src/main/java/io/sf/carte/echosvg/css/engine/value/svg12/TextAlignManager.java

@@ -24,6 +24,8 @@
 import io.sf.carte.echosvg.css.engine.value.Value;
 import io.sf.carte.echosvg.css.engine.value.ValueConstants;
 import io.sf.carte.echosvg.css.engine.value.ValueManager;
+import io.sf.carte.echosvg.css.engine.value.svg.SVGValueConstants;
+import io.sf.carte.echosvg.util.CSSConstants;
 import io.sf.carte.echosvg.util.SVG12CSSConstants;
 import io.sf.carte.echosvg.util.SVGTypes;
 
@@ -43,7 +45,8 @@ public class TextAlignManager extends IdentifierManager {
 
 	static {
 		values.put(SVG12CSSConstants.CSS_START_VALUE, SVG12ValueConstants.START_VALUE);
-		values.put(SVG12CSSConstants.CSS_MIDDLE_VALUE, SVG12ValueConstants.MIDDLE_VALUE);
+		values.put(CSSConstants.CSS_CENTER_VALUE, SVG12ValueConstants.CENTER_VALUE);
+		values.put(CSSConstants.CSS_MIDDLE_VALUE, SVGValueConstants.MIDDLE_VALUE);
 		values.put(SVG12CSSConstants.CSS_END_VALUE, SVG12ValueConstants.END_VALUE);
 		values.put(SVG12CSSConstants.CSS_FULL_VALUE, SVG12ValueConstants.FULL_VALUE);
 	}

echosvg-util/src/main/java/io/sf/carte/echosvg/util/SVG12CSSConstants.java

@@ -41,7 +41,7 @@ public interface SVG12CSSConstants extends CSSConstants {
 	String CSS_MARGIN_LEFT_PROPERTY = "margin-left";
 	/** property name for indent */
 	String CSS_INDENT_PROPERTY = "indent";
-	/** propery name for text-align */
+	/** property name for text-align */
 	String CSS_TEXT_ALIGN_PROPERTY = "text-align";
 	/** property name for color attribute */
 	String CSS_SOLID_COLOR_PROPERTY = "solid-color";
@@ -50,8 +50,6 @@ public interface SVG12CSSConstants extends CSSConstants {
 
 	/** Value for text-align to start of text on line */
 	String CSS_START_VALUE = "start";
-	/** Value for text-align to middle of text on line */
-	String CSS_MIDDLE_VALUE = "middle";
 	/** Value for text-align to end of region */
 	String CSS_END_VALUE = "end";
 	/** Value for text-align to both edges of region */