Add material theme support to Flow.

flow-theme-integrations/material/pom.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>com.vaadin</groupId>
+        <artifactId>flow-theme-integrations</artifactId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>vaadin-material-theme</artifactId>
+    <name>Material theme for Flow</name>
+    <description>Package with Material dependencies and setting for use with Flow
+    </description>
+    <packaging>jar</packaging>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.webjars.bowergithub.vaadin</groupId>
+            <artifactId>vaadin-material-styles</artifactId>
+            <version>0.4.0</version>
+        </dependency>
+    </dependencies>
+</project>

flow-theme-integrations/material/src/main/java/com/vaadin/flow/theme/material/Material.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright 2000-2017 Vaadin Ltd.
+ *
+ * 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.vaadin.flow.theme.material;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+import org.slf4j.LoggerFactory;
+
+import com.vaadin.flow.component.dependency.HtmlImport;
+import com.vaadin.flow.theme.AbstractTheme;
+
+/**
+ * Material component theme class implementation.
+ */
+@HtmlImport("frontend://bower_components/vaadin-material-styles/color.html")
+@HtmlImport("frontend://bower_components/vaadin-material-styles/typography.html")
+public class Material implements AbstractTheme {
+    public static final String LIGHT = "light";
+    public static final String DARK = "dark";
+
+    @Override
+    public String getBaseUrl() {
+        return "src/";
+    }
+
+    @Override
+    public String getThemeUrl() {
+        return "theme/material/";
+    }
+
+    @Override
+    public List<String> getHeaderInlineContents() {
+        return Collections.singletonList("<custom-style>\n"
+                + "    <style include=\"material-color-light material-typography\"></style>\n"
+                + "</custom-style>");
+    }
+
+    @Override
+    public Map<String, String> getBodyAttributes(String variant) {
+        switch (variant) {
+        case LIGHT:
+            return Collections.singletonMap("theme", LIGHT);
+        case DARK:
+            return Collections.singletonMap("theme", DARK);
+        default:
+            if (!variant.isEmpty()) {
+                LoggerFactory.getLogger(getClass().getName()).warn(
+                        "Material theme variant not recognized: '{0}'. Using no variant.",
+                        variant);
+            }
+            return Collections.emptyMap();
+        }
+    }
+}

flow-theme-integrations/pom.xml

@@ -15,6 +15,7 @@
 
     <modules>
         <module>lumo</module>
+        <module>material</module>
     </modules>
 
     <dependencies>