Font Resource Injector.

Author: kevzlou7979

gwt-material/src/main/java/gwt/material/design/client/base/ToastPosition.java

@@ -1,3 +1,22 @@
+/*
+ * #%L
+ * GwtMaterial
+ * %%
+ * Copyright (C) 2015 - 2021 GwtMaterialDesign
+ * %%
+ * 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.
+ * #L%
+ */
 package gwt.material.design.client.base;
 
 public enum ToastPosition {

gwt-material/src/main/java/gwt/material/design/client/events/OpeningEvent.java

@@ -7,9 +7,9 @@
  * 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.
@@ -48,4 +48,4 @@ public Type<OpeningHandler> getAssociatedType() {
     protected void dispatch(OpeningHandler handler) {
         handler.onOpening(this);
     }
-}
+}

gwt-material/src/main/java/gwt/material/design/client/font/Font.java

@@ -0,0 +1,54 @@
+/*
+ * #%L
+ * GwtMaterial
+ * %%
+ * Copyright (C) 2015 - 2021 GwtMaterialDesign
+ * %%
+ * 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.
+ * #L%
+ */
+package gwt.material.design.client.font;
+
+public class Font {
+
+    private String resourceUrl;
+    private String name;
+
+    public Font() {
+    }
+
+    public Font(String resourceUrl, String name) {
+        this.resourceUrl = resourceUrl;
+        this.name = name;
+    }
+
+    public Font(String name) {
+        this.name = name;
+    }
+
+    public String getResourceUrl() {
+        return resourceUrl;
+    }
+
+    public void setResourceUrl(String resourceUrl) {
+        this.resourceUrl = resourceUrl;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

gwt-material/src/main/java/gwt/material/design/client/font/FontResourceInjector.java

@@ -0,0 +1,73 @@
+/*
+ * #%L
+ * GwtMaterial
+ * %%
+ * Copyright (C) 2015 - 2021 GwtMaterialDesign
+ * %%
+ * 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.
+ * #L%
+ */
+package gwt.material.design.client.font;
+
+import com.google.gwt.dom.client.Document;
+import com.google.gwt.dom.client.Element;
+import com.google.gwt.dom.client.LinkElement;
+import com.google.gwt.dom.client.StyleElement;
+import gwt.material.design.client.base.DefaultHtmlSanitizer;
+
+public class FontResourceInjector {
+
+    private static Element headElement;
+    private static Font defaultFont;
+
+    public static void inject(Font font) {
+        String name = getDefaultFont().getName();
+        if (createFontUrlLink(font.getResourceUrl())) {
+            name = font.getName();
+        }
+
+        // Will generate a style tag containing the font name
+        StyleElement styleElement = Document.get().createStyleElement();
+        styleElement.setInnerSafeHtml(new DefaultHtmlSanitizer().sanitize("body * { font-family:" + name + ";}"));
+        getHeadElement().appendChild(styleElement);
+    }
+
+    public static Font getDefaultFont() {
+        if (defaultFont == null) {
+            defaultFont = new OpenSansFont();
+        }
+        return defaultFont;
+    }
+
+    public static void setDefaultFont(Font defaultFont) {
+        FontResourceInjector.defaultFont = defaultFont;
+    }
+
+    protected static boolean createFontUrlLink(String resourceUrl) {
+        if (resourceUrl != null) {
+            LinkElement fontUrlLink = Document.get().createLinkElement();
+            fontUrlLink.setHref(resourceUrl);
+            fontUrlLink.setRel("stylesheet");
+            getHeadElement().appendChild(fontUrlLink);
+            return true;
+        }
+        return false;
+    }
+
+    public static Element getHeadElement() {
+        if (headElement == null) {
+            headElement = Document.get().getElementsByTagName("head").getItem(0);
+        }
+        return headElement;
+    }
+}

gwt-material/src/main/java/gwt/material/design/client/font/OpenSansFont.java

@@ -0,0 +1,11 @@
+package gwt.material.design.client.font;
+
+public class OpenSansFont extends Font {
+
+    public static String RESOURCE = "https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;600;700&display=swap";
+    public static String NAME = "Open Sans";
+
+    public OpenSansFont() {
+        super(RESOURCE, NAME);
+    }
+}

gwt-material/src/main/java/gwt/material/design/client/ui/MaterialToast.java

@@ -209,6 +209,10 @@ public String getId() {
         return element != null ? (String) element.attr("id") : null;
     }
 
+    public void addWidget(Widget... widgets) {
+        this.widgets = widgets;
+    }
+
     public JQueryElement getElement() {
         return element;
     }