Merge pull request #2704 from sailorgeoffrey/master

* pr/2704:
  Add support for ANSI colored resource banners

spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -72,6 +72,10 @@ display (surrounded with brackets and prefixed with `v`). For example `(v1.0)`.
 |`${spring-boot.formatted-version}`
 |The Spring Boot version that you are using formatted for display (surrounded with
 brackets and prefixed with `v`). For example `(v{spring-boot-version})`.
+
+|`${Ansi.NAME}`,
+|Where `NAME` is the name of an ANSI escape code. See
+{sc-spring-boot}/ansi/AnsiPropertySource.{sc-ext}[`AnsiPropertySource`] for details.
 |===
 
 TIP: The `SpringBootApplication.setBanner(...)` method can be used if you want to generate

spring-boot/src/main/java/org/springframework/boot/ResourceBanner.java

@@ -25,6 +25,7 @@ import java.util.Map;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.springframework.boot.ansi.AnsiPropertySource;
 import org.springframework.core.env.Environment;
 import org.springframework.core.env.MapPropertySource;
 import org.springframework.core.env.MutablePropertySources;
@@ -77,6 +78,7 @@ public class ResourceBanner implements Banner {
 		List<PropertyResolver> resolvers = new ArrayList<PropertyResolver>();
 		resolvers.add(environment);
 		resolvers.add(getVersionResolver(sourceClass));
+		resolvers.add(getAnsiResolver());
 		return resolvers;
 	}
 
@@ -114,4 +116,10 @@ public class ResourceBanner implements Banner {
 		return (format ? " (v" + version + ")" : version);
 	}
 
+	private PropertyResolver getAnsiResolver() {
+		MutablePropertySources sources = new MutablePropertySources();
+		sources.addFirst(new AnsiPropertySource("ansi", true));
+		return new PropertySourcesPropertyResolver(sources);
+	}
+
 }

spring-boot/src/main/java/org/springframework/boot/SpringBootBanner.java

@@ -21,9 +21,9 @@ import java.io.PrintStream;
 import org.springframework.boot.ansi.AnsiOutput;
 import org.springframework.core.env.Environment;
 
-import static org.springframework.boot.ansi.AnsiElement.DEFAULT;
-import static org.springframework.boot.ansi.AnsiElement.FAINT;
-import static org.springframework.boot.ansi.AnsiElement.GREEN;
+import static org.springframework.boot.ansi.AnsiColor.DEFAULT;
+import static org.springframework.boot.ansi.AnsiColor.GREEN;
+import static org.springframework.boot.ansi.AnsiStyle.FAINT;
 
 /**
  * Default Banner implementation which writes the 'Spring' banner.

spring-boot/src/main/java/org/springframework/boot/ansi/AnsiBackground.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2012-2015 the original author or authors.
+ *
+ * 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 org.springframework.boot.ansi;
+
+/**
+ * {@link AnsiElement Ansi} background colors.
+ *
+ * @author Phillip Webb
+ * @author Geoffrey Chandler
+ * @since 1.3.0
+ */
+public enum AnsiBackground implements AnsiElement {
+
+	DEFAULT("49"),
+
+	BLACK("40"),
+
+	RED("41"),
+
+	GREEN("42"),
+
+	YELLOW("43"),
+
+	BLUE("44"),
+
+	MAGENTA("45"),
+
+	CYAN("46"),
+
+	WHITE("47"),
+
+	BRIGHT_BLACK("100"),
+
+	BRIGHT_RED("101"),
+
+	BRIGHT_GREEN("102"),
+
+	BRIGHT_YELLOW("103"),
+
+	BRIGHT_BLUE("104"),
+
+	BRIGHT_MAGENTA("105"),
+
+	BRIGHT_CYAN("106"),
+
+	BRIGHT_WHITE("107");
+
+	private String code;
+
+	private AnsiBackground(String code) {
+		this.code = code;
+	}
+
+	@Override
+	public String toString() {
+		return this.code;
+	}
+
+}

spring-boot/src/main/java/org/springframework/boot/ansi/AnsiColor.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2012-2015 the original author or authors.
+ *
+ * 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 org.springframework.boot.ansi;
+
+/**
+ * {@link AnsiElement Ansi} colors.
+ *
+ * @author Phillip Webb
+ * @author Geoffrey Chandler
+ * @since 1.3.0
+ */
+public enum AnsiColor implements AnsiElement {
+
+	DEFAULT("39"),
+
+	BLACK("30"),
+
+	RED("31"),
+
+	GREEN("32"),
+
+	YELLOW("33"),
+
+	BLUE("34"),
+
+	MAGENTA("35"),
+
+	CYAN("36"),
+
+	WHITE("37"),
+
+	BRIGHT_BLACK("90"),
+
+	BRIGHT_RED("91"),
+
+	BRIGHT_GREEN("92"),
+
+	BRIGHT_YELLOW("93"),
+
+	BRIGHT_BLUE("94"),
+
+	BRIGHT_MAGENTA("95"),
+
+	BRIGHT_CYAN("96"),
+
+	BRIGHT_WHITE("97");
+
+	private final String code;
+
+	private AnsiColor(String code) {
+		this.code = code;
+	}
+
+	@Override
+	public String toString() {
+		return this.code;
+	}
+
+}

spring-boot/src/main/java/org/springframework/boot/ansi/AnsiElement.java

@@ -23,32 +23,88 @@ package org.springframework.boot.ansi;
  */
 public interface AnsiElement {
 
+	/**
+	 * @deprecated in 1.3.0 in favor of {@link AnsiStyle#NORMAL}
+	 */
+	@Deprecated
 	public static final AnsiElement NORMAL = new DefaultAnsiElement("0");
 
+	/**
+	 * @deprecated in 1.3.0 in favor of {@link AnsiStyle#BOLD}
+	 */
+	@Deprecated
 	public static final AnsiElement BOLD = new DefaultAnsiElement("1");
 
+	/**
+	 * @deprecated in 1.3.0 in favor of {@link AnsiStyle#FAINT}
+	 */
+	@Deprecated
 	public static final AnsiElement FAINT = new DefaultAnsiElement("2");
 
+	/**
+	 * @deprecated in 1.3.0 in favor of {@link AnsiStyle#ITALIC}
+	 */
+	@Deprecated
 	public static final AnsiElement ITALIC = new DefaultAnsiElement("3");
 
+	/**
+	 * @deprecated in 1.3.0 in favor of {@link AnsiStyle#UNDERLINE}
+	 */
+	@Deprecated
 	public static final AnsiElement UNDERLINE = new DefaultAnsiElement("4");
 
+	/**
+	 * @deprecated in 1.3.0 in favor of {@link AnsiColor#BLACK}
+	 */
+	@Deprecated
 	public static final AnsiElement BLACK = new DefaultAnsiElement("30");
 
+	/**
+	 * @deprecated in 1.3.0 in favor of {@link AnsiColor#RED}
+	 */
+	@Deprecated
 	public static final AnsiElement RED = new DefaultAnsiElement("31");
 
+	/**
+	 * @deprecated in 1.3.0 in favor of {@link AnsiColor#GREEN}
+	 */
+	@Deprecated
 	public static final AnsiElement GREEN = new DefaultAnsiElement("32");
 
+	/**
+	 * @deprecated in 1.3.0 in favor of {@link AnsiColor#YELLOW}
+	 */
+	@Deprecated
 	public static final AnsiElement YELLOW = new DefaultAnsiElement("33");
 
+	/**
+	 * @deprecated in 1.3.0 in favor of {@link AnsiColor#BLUE}
+	 */
+	@Deprecated
 	public static final AnsiElement BLUE = new DefaultAnsiElement("34");
 
+	/**
+	 * @deprecated in 1.3.0 in favor of {@link AnsiColor#MAGENTA}
+	 */
+	@Deprecated
 	public static final AnsiElement MAGENTA = new DefaultAnsiElement("35");
 
+	/**
+	 * @deprecated in 1.3.0 in favor of {@link AnsiColor#CYAN}
+	 */
+	@Deprecated
 	public static final AnsiElement CYAN = new DefaultAnsiElement("36");
 
+	/**
+	 * @deprecated in 1.3.0 in favor of {@link AnsiColor#WHITE}
+	 */
+	@Deprecated
 	public static final AnsiElement WHITE = new DefaultAnsiElement("37");
 
+	/**
+	 * @deprecated in 1.3.0 in favor of {@link AnsiColor#DEFAULT}
+	 */
+	@Deprecated
 	public static final AnsiElement DEFAULT = new DefaultAnsiElement("39");
 
 	/**

spring-boot/src/main/java/org/springframework/boot/ansi/AnsiOutput.java

@@ -39,7 +39,7 @@ public abstract class AnsiOutput {
 
 	private static final String ENCODE_END = "m";
 
-	private static final String RESET = "0;" + AnsiElement.DEFAULT;
+	private static final String RESET = "0;" + AnsiColor.DEFAULT;
 
 	/**
 	 * Sets if ANSI output is enabled.
@@ -63,6 +63,18 @@ public abstract class AnsiOutput {
 		return AnsiOutput.enabled;
 	}
 
+	/**
+	 * Encode a single {@link AnsiElement} if output is enabled.
+	 * @param element the element to encode
+	 * @return the encoded element or an empty string
+	 */
+	public static String encode(AnsiElement element) {
+		if (isEnabled()) {
+			return ENCODE_START + element + ENCODE_END;
+		}
+		return "";
+	}
+
 	/**
 	 * Create a new ANSI string from the specified elements. Any {@link AnsiElement}s will
 	 * be encoded as required.

spring-boot/src/main/java/org/springframework/boot/ansi/AnsiPropertySource.java

@@ -0,0 +1,110 @@
+/*
+ * Copyright 2012-2015 the original author or authors.
+ *
+ * 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 org.springframework.boot.ansi;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.EnumSet;
+import java.util.List;
+import java.util.Set;
+
+import org.springframework.core.env.PropertyResolver;
+import org.springframework.core.env.PropertySource;
+import org.springframework.util.StringUtils;
+
+/**
+ * {@link PropertyResolver} for {@link AnsiStyle}, {@link AnsiColor} and
+ * {@link AnsiBackground} elements. Supports properties of the form {@code AnsiStyle.BOLD}
+ * , {@code AnsiColor.RED} or {@code AnsiBackground.GREEN}. Also supports a prefix of
+ * {@code Ansi.} which is an aggregation of everything (with background colors prefixed
+ * {@code BG_}).
+ *
+ * @author Phillip Webb
+ * @since 1.3.0
+ */
+public class AnsiPropertySource extends PropertySource<AnsiElement> {
+
+	private static final Iterable<MappedEnum<?>> MAPPED_ENUMS;
+	static {
+		List<MappedEnum<?>> enums = new ArrayList<MappedEnum<?>>();
+		enums.add(new MappedEnum<AnsiStyle>("AnsiStyle.", AnsiStyle.class));
+		enums.add(new MappedEnum<AnsiColor>("AnsiColor.", AnsiColor.class));
+		enums.add(new MappedEnum<AnsiBackground>("AnsiBackground.", AnsiBackground.class));
+		enums.add(new MappedEnum<AnsiStyle>("Ansi.", AnsiStyle.class));
+		enums.add(new MappedEnum<AnsiColor>("Ansi.", AnsiColor.class));
+		enums.add(new MappedEnum<AnsiBackground>("Ansi.BG_", AnsiBackground.class));
+		MAPPED_ENUMS = Collections.unmodifiableList(enums);
+	}
+
+	private final boolean encode;
+
+	/**
+	 * Create a new {@link AnsiPropertySource} instance.
+	 * @param name the name of the property source
+	 * @param encode if the output should be encoded
+	 */
+	public AnsiPropertySource(String name, boolean encode) {
+		super(name);
+		this.encode = encode;
+	}
+
+	@Override
+	public Object getProperty(String name) {
+		if (StringUtils.hasLength(name)) {
+			for (MappedEnum<?> mappedEnum : MAPPED_ENUMS) {
+				if (name.startsWith(mappedEnum.getPrefix())) {
+					String enumName = name.substring(mappedEnum.getPrefix().length());
+					for (Enum<?> ansiEnum : mappedEnum.getEnums()) {
+						if (ansiEnum.name().equals(enumName)) {
+							if (this.encode) {
+								return AnsiOutput.encode((AnsiElement) ansiEnum);
+							}
+							return ansiEnum;
+						}
+					}
+				}
+			}
+		}
+		return null;
+	}
+
+	/**
+	 * Mapping between an enum and the pseudo property source.
+	 */
+	private static class MappedEnum<E extends Enum<E>> {
+
+		private final String prefix;
+
+		private final Set<E> enums;
+
+		public MappedEnum(String prefix, Class<E> enumType) {
+			this.prefix = prefix;
+			this.enums = EnumSet.allOf(enumType);
+
+		}
+
+		public String getPrefix() {
+			return this.prefix;
+		}
+
+		public Set<E> getEnums() {
+			return this.enums;
+		}
+
+	}
+
+}

spring-boot/src/main/java/org/springframework/boot/ansi/AnsiStyle.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2012-2015 the original author or authors.
+ *
+ * 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 org.springframework.boot.ansi;
+
+/**
+ * {@link AnsiElement Ansi} styles.
+ *
+ * @author Phillip Webb
+ * @since 1.3.0
+ */
+public enum AnsiStyle implements AnsiElement {
+
+	NORMAL("0"),
+
+	BOLD("1"),
+
+	FAINT("2"),
+
+	ITALIC("3"),
+
+	UNDERLINE("4");
+
+	private final String code;
+
+	private AnsiStyle(String code) {
+		this.code = code;
+	}
+
+	@Override
+	public String toString() {
+		return this.code;
+	}
+
+}

spring-boot/src/main/java/org/springframework/boot/logging/logback/ColorConverter.java

@@ -20,8 +20,10 @@ import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 
+import org.springframework.boot.ansi.AnsiColor;
 import org.springframework.boot.ansi.AnsiElement;
 import org.springframework.boot.ansi.AnsiOutput;
+import org.springframework.boot.ansi.AnsiStyle;
 
 import ch.qos.logback.classic.Level;
 import ch.qos.logback.classic.spi.ILoggingEvent;
@@ -39,21 +41,21 @@ public class ColorConverter extends CompositeConverter<ILoggingEvent> {
 	private static final Map<String, AnsiElement> ELEMENTS;
 	static {
 		Map<String, AnsiElement> elements = new HashMap<String, AnsiElement>();
-		elements.put("faint", AnsiElement.FAINT);
-		elements.put("red", AnsiElement.RED);
-		elements.put("green", AnsiElement.GREEN);
-		elements.put("yellow", AnsiElement.YELLOW);
-		elements.put("blue", AnsiElement.BLUE);
-		elements.put("magenta", AnsiElement.MAGENTA);
-		elements.put("cyan", AnsiElement.CYAN);
+		elements.put("faint", AnsiStyle.FAINT);
+		elements.put("red", AnsiColor.RED);
+		elements.put("green", AnsiColor.GREEN);
+		elements.put("yellow", AnsiColor.YELLOW);
+		elements.put("blue", AnsiColor.BLUE);
+		elements.put("magenta", AnsiColor.MAGENTA);
+		elements.put("cyan", AnsiColor.CYAN);
 		ELEMENTS = Collections.unmodifiableMap(elements);
 	}
 
 	private static final Map<Integer, AnsiElement> LEVELS;
 	static {
 		Map<Integer, AnsiElement> levels = new HashMap<Integer, AnsiElement>();
-		levels.put(Level.ERROR_INTEGER, AnsiElement.RED);
-		levels.put(Level.WARN_INTEGER, AnsiElement.YELLOW);
+		levels.put(Level.ERROR_INTEGER, AnsiColor.RED);
+		levels.put(Level.WARN_INTEGER, AnsiColor.YELLOW);
 		LEVELS = Collections.unmodifiableMap(levels);
 	}
 
@@ -63,7 +65,7 @@ public class ColorConverter extends CompositeConverter<ILoggingEvent> {
 		if (element == null) {
 			// Assume highlighting
 			element = LEVELS.get(event.getLevel().toInteger());
-			element = (element == null ? AnsiElement.GREEN : element);
+			element = (element == null ? AnsiColor.GREEN : element);
 		}
 		return toAnsiString(in, element);
 	}

spring-boot/src/test/java/org/springframework/boot/ResourceBannerTests.java

@@ -21,7 +21,10 @@ import java.io.PrintStream;
 import java.util.Collections;
 import java.util.Map;
 
+import org.junit.After;
 import org.junit.Test;
+import org.springframework.boot.ansi.AnsiOutput;
+import org.springframework.boot.ansi.AnsiOutput.Enabled;
 import org.springframework.core.env.ConfigurableEnvironment;
 import org.springframework.core.env.MapPropertySource;
 import org.springframework.core.io.ByteArrayResource;
@@ -38,6 +41,11 @@ import static org.junit.Assert.assertThat;
  */
 public class ResourceBannerTests {
 
+	@After
+	public void reset() {
+		AnsiOutput.setEnabled(Enabled.DETECT);
+	}
+
 	@Test
 	public void renderVersions() throws Exception {
 		Resource resource = new ByteArrayResource(
@@ -72,6 +80,24 @@ public class ResourceBannerTests {
 		assertThat(banner, startsWith("banner 1"));
 	}
 
+	@Test
+	public void renderWithColors() throws Exception {
+		Resource resource = new ByteArrayResource(
+				"${Ansi.RED}This is red.${Ansi.NORMAL}".getBytes());
+		AnsiOutput.setEnabled(AnsiOutput.Enabled.ALWAYS);
+		String banner = printBanner(resource, null, null);
+		assertThat(banner, startsWith("\u001B[31mThis is red.\u001B[0m"));
+	}
+
+	@Test
+	public void renderWithColorsButDisabled() throws Exception {
+		Resource resource = new ByteArrayResource(
+				"${Ansi.RED}This is red.${Ansi.NORMAL}".getBytes());
+		AnsiOutput.setEnabled(AnsiOutput.Enabled.NEVER);
+		String banner = printBanner(resource, null, null);
+		assertThat(banner, startsWith("This is red."));
+	}
+
 	private String printBanner(Resource resource, String bootVersion,
 			String applicationVersion) {
 		ResourceBanner banner = new MockResourceBanner(resource, bootVersion,

spring-boot/src/test/java/org/springframework/boot/ansi/AnsiPropertySourceTests.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2012-2015 the original author or authors.
+ *
+ * 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 org.springframework.boot.ansi;
+
+import org.junit.After;
+import org.junit.Test;
+import org.springframework.boot.ansi.AnsiOutput.Enabled;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.nullValue;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Tests for {@link AnsiPropertySource}.
+ *
+ * @author Phillip Webb
+ */
+public class AnsiPropertySourceTests {
+
+	private AnsiPropertySource source = new AnsiPropertySource("ansi", false);
+
+	@After
+	public void reset() {
+		AnsiOutput.setEnabled(Enabled.DETECT);
+	}
+
+	@Test
+	public void getAnsiStyle() throws Exception {
+		assertThat(this.source.getProperty("AnsiStyle.BOLD"),
+				equalTo((Object) AnsiStyle.BOLD));
+	}
+
+	@Test
+	public void getAnsiColor() throws Exception {
+		assertThat(this.source.getProperty("AnsiColor.RED"),
+				equalTo((Object) AnsiColor.RED));
+	}
+
+	@Test
+	public void getAnsiBackground() throws Exception {
+		assertThat(this.source.getProperty("AnsiBackground.GREEN"),
+				equalTo((Object) AnsiBackground.GREEN));
+	}
+
+	@Test
+	public void getAnsi() throws Exception {
+		assertThat(this.source.getProperty("Ansi.BOLD"), equalTo((Object) AnsiStyle.BOLD));
+		assertThat(this.source.getProperty("Ansi.RED"), equalTo((Object) AnsiColor.RED));
+		assertThat(this.source.getProperty("Ansi.BG_RED"),
+				equalTo((Object) AnsiBackground.RED));
+	}
+
+	@Test
+	public void getMissing() throws Exception {
+		assertThat(this.source.getProperty("AnsiStyle.NOPE"), nullValue());
+	}
+
+	@Test
+	public void encodeEnabled() throws Exception {
+		AnsiOutput.setEnabled(Enabled.ALWAYS);
+		AnsiPropertySource source = new AnsiPropertySource("ansi", true);
+		assertThat(source.getProperty("Ansi.RED"), equalTo((Object) "\033[31m"));
+	}
+
+	@Test
+	public void encodeDisabled() throws Exception {
+		AnsiOutput.setEnabled(Enabled.NEVER);
+		AnsiPropertySource source = new AnsiPropertySource("ansi", true);
+		assertThat(source.getProperty("Ansi.RED"), equalTo((Object) ""));
+	}
+
+}