Auto merge of #13860 - canaltinova:text-emphasis-style, r=Manishearth,emilio

Implement parsing/serialization and gecko glue for text-emphasis-style

<!-- Please describe your changes on the following line: -->
Implementation of parsing/serialization and gecko glue for text-emphasis-style.

r? @Manishearth

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #13853 (github issue number if applicable).

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- [X] There are tests for these changes

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tests/unit/style/parsing/inherited_text.rs

@@ -0,0 +1,46 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use cssparser::Parser;
+use media_queries::CSSErrorReporterTest;
+use style::parser::ParserContext;
+use style::stylesheets::Origin;
+use url::Url;
+
+#[test]
+fn text_emphasis_style_longhand_should_parse_properly() {
+    use style::properties::longhands::text_emphasis_style;
+    use style::properties::longhands::text_emphasis_style::{ShapeKeyword, SpecifiedValue, KeywordValue};
+
+    let none = parse_longhand!(text_emphasis_style, "none");
+    assert_eq!(none, SpecifiedValue::None);
+
+    let fill = parse_longhand!(text_emphasis_style, "open");
+    let fill_struct = SpecifiedValue::Keyword(KeywordValue::Fill(false));
+    assert_eq!(fill, fill_struct);
+
+    let shape = parse_longhand!(text_emphasis_style, "triangle");
+    let shape_struct = SpecifiedValue::Keyword(KeywordValue::Shape(ShapeKeyword::Triangle));
+    assert_eq!(shape, shape_struct);
+
+    let fill_shape = parse_longhand!(text_emphasis_style, "filled dot");
+    let fill_shape_struct = SpecifiedValue::Keyword(KeywordValue::FillAndShape(true, ShapeKeyword::Dot));
+    assert_eq!(fill_shape, fill_shape_struct);
+
+    let shape_fill = parse_longhand!(text_emphasis_style, "dot filled");
+    let shape_fill_struct = SpecifiedValue::Keyword(KeywordValue::FillAndShape(true, ShapeKeyword::Dot));
+    assert_eq!(shape_fill, shape_fill_struct);
+
+    let a_string = parse_longhand!(text_emphasis_style, "\"a\"");
+    let a_string_struct = SpecifiedValue::String("a".to_string());
+    assert_eq!(a_string, a_string_struct);
+
+    let chinese_string = parse_longhand!(text_emphasis_style, "\"点\"");
+    let chinese_string_struct = SpecifiedValue::String("点".to_string());
+    assert_eq!(chinese_string, chinese_string_struct);
+
+    let unicode_string = parse_longhand!(text_emphasis_style, "\"\\25B2\"");
+    let unicode_string_struct = SpecifiedValue::String("▲".to_string());
+    assert_eq!(unicode_string, unicode_string_struct);
+}

tests/unit/style/parsing/mod.rs

@@ -63,6 +63,7 @@ macro_rules! parse_longhand {
 
 mod basic_shape;
 mod image;
+mod inherited_text;
 mod mask;
 mod position;
 mod selectors;