| /* |
| * Copyright 2014 Google Inc. |
| * |
| * 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.google.gwt.resources.converter; |
| |
| import com.google.gwt.resources.css.ast.Context; |
| import com.google.gwt.resources.css.ast.CssProperty; |
| import com.google.gwt.resources.css.ast.CssProperty.ListValue; |
| import com.google.gwt.resources.css.ast.CssVisitor; |
| import com.google.gwt.thirdparty.guava.common.base.Splitter; |
| |
| import java.util.regex.Pattern; |
| |
| /** |
| * Escapes white spaces in font-family declarations, thus allowing usage of fonts that might |
| * be mistaken for constants. |
| */ |
| public class FontFamilyVisitor extends CssVisitor { |
| // font family name that contains white space(s) and aren't escaped yet. |
| private static Pattern ESCAPE_TEST = Pattern.compile("^[^'\"].*\\s.*[^'\"]$"); |
| @Override |
| public boolean visit(CssProperty x, Context ctx) { |
| |
| if ("font-family".equals(x.getName())) { |
| ListValue values = x.getValues(); |
| String css = values.toCss(); |
| StringBuilder valueBuilder = new StringBuilder(); |
| |
| boolean first = true; |
| |
| for (String subProperty : Splitter.on(",").trimResults().omitEmptyStrings().split(css)) { |
| if (first) { |
| first = false; |
| } else { |
| valueBuilder.append(","); |
| } |
| |
| if (hasToBeEscaped(subProperty)) { |
| valueBuilder.append("'" + subProperty + "'"); |
| } else { |
| valueBuilder.append(subProperty); |
| } |
| } |
| |
| x.setValue(new SimpleValue(valueBuilder.toString())); |
| } |
| return false; |
| } |
| |
| private boolean hasToBeEscaped(String fontFamilyName) { |
| return ESCAPE_TEST.matcher(fontFamilyName).matches(); |
| } |
| } |