[gtksourceview: 7/13] css.lang: Handle escapes in unquoted strings/identifiers

[Christian Hergert <chergert src gnome org>]

commit d2359ef703ca4db36da030edd0fcd39cb996d0bd
Author: Jeffery To <jeffery to gmail com>
Date:   Tue Dec 3 05:08:54 2019 +0800

    css.lang: Handle escapes in unquoted strings/identifiers
    
    * Add name-value to any-value and attribute-selector-content (attribute
      values can be identifiers or strings).
    
      This allows escapes in unquoted strings (identifiers) to be consumed
      as part of the name context.
    
    * Add escape to url.
    
      Since unquoted strings inside url() are URLs and not identifiers,
      reference the escape context directly.

 data/language-specs/css.lang        | 3 +++
 data/language-specs/less.lang       | 2 ++
 data/language-specs/scss.lang       | 2 ++
 tests/syntax-highlighting/file.css  | 1 +
 tests/syntax-highlighting/file.less | 1 +
 tests/syntax-highlighting/file.scss | 1 +
 6 files changed, 10 insertions(+)
---
diff --git a/data/language-specs/css.lang b/data/language-specs/css.lang
index df4b4869..ca33daa1 100644
--- a/data/language-specs/css.lang
+++ b/data/language-specs/css.lang
@@ -607,6 +607,7 @@
         <context sub-pattern="0" where="end" style-ref="function"/>
         <context ref="embedded-lang-hook"/>
         <context ref="comment"/>
+        <context ref="escape" ignore-style="true"/>
         <context ref="string-value"/>
       </include>
     </context>
@@ -1569,6 +1570,7 @@
         <context ref="function-call"/>
         <context ref="property-value-keyword"/>
         <context ref="data-value"/>
+        <context ref="name-value"/>
         <context ref="slash"/>
         <context ref="comma"/> <!-- for lists -->
       </include>
@@ -2310,6 +2312,7 @@
         <context ref="attribute-selector-attribute-name"/>
         <context ref="attribute-selector-operator"/>
         <context ref="string-value"/>
+        <context ref="name-value"/>
       </include>
     </context>
 
diff --git a/data/language-specs/less.lang b/data/language-specs/less.lang
index 53f83e74..f465c058 100644
--- a/data/language-specs/less.lang
+++ b/data/language-specs/less.lang
@@ -292,6 +292,7 @@
         <context ref="css:embedded-lang-hook"/>
         <!-- only accept multi-line comments because // is part of urls -->
         <context ref="css:comment" original="true"/>
+        <context ref="css:escape" ignore-style="true"/>
         <context ref="css:string-value"/>
       </include>
     </context>
@@ -369,6 +370,7 @@
         <context ref="css:number-value"/>
         <context ref="css:unicode-range"/>
         <context ref="arithmetic-operator"/>
+        <context ref="css:name-value" original="true"/>
         <context ref="css:slash"/>
         <context ref="css:comma"/>
       </include>
diff --git a/data/language-specs/scss.lang b/data/language-specs/scss.lang
index 00a0f874..ba24fdc7 100644
--- a/data/language-specs/scss.lang
+++ b/data/language-specs/scss.lang
@@ -254,6 +254,7 @@
         <context ref="css:embedded-lang-hook"/>
         <!-- only accept multi-line comments because // is part of urls -->
         <context ref="css:comment" original="true"/>
+        <context ref="css:escape" ignore-style="true"/>
         <context ref="css:string-value"/>
       </include>
     </context>
@@ -330,6 +331,7 @@
         <context ref="logical-operator"/>
         <context ref="comparison-operator"/>
         <context ref="arithmetic-operator"/>
+        <context ref="css:name-value" original="true"/>
         <context ref="css:slash"/>
         <context ref="css:comma"/>
       </include>
diff --git a/tests/syntax-highlighting/file.css b/tests/syntax-highlighting/file.css
index 2d04188c..450a694c 100644
--- a/tests/syntax-highlighting/file.css
+++ b/tests/syntax-highlighting/file.css
@@ -195,6 +195,7 @@ svg|[fill] { /* attribute */
     content: "\E9 dition \
               \"\0000E9dition\" \
               \e9motion";
+    font-family: \E9 dition, \"\0000E9dition\", \e9motion;
 
     /* function name */
     background: \u\72\l(image.png);
diff --git a/tests/syntax-highlighting/file.less b/tests/syntax-highlighting/file.less
index 1132b4cc..e0ddd211 100644
--- a/tests/syntax-highlighting/file.less
+++ b/tests/syntax-highlighting/file.less
@@ -617,6 +617,7 @@ svg|[fill] { /* attribute */
     content: "\E9 dition \
               \"\0000E9dition\" \
               \e9motion";
+    font-family: \E9 dition, \"\0000E9dition\", \e9motion;
 
     /* function name */
     background: \u\72\l(image.png);
diff --git a/tests/syntax-highlighting/file.scss b/tests/syntax-highlighting/file.scss
index a2e611d4..f7444094 100644
--- a/tests/syntax-highlighting/file.scss
+++ b/tests/syntax-highlighting/file.scss
@@ -642,6 +642,7 @@ svg|[fill] { /* attribute */
     content: "\E9 dition \
               \"\0000E9dition\" \
               \e9motion";
+    font-family: \E9 dition, \"\0000E9dition\", \e9motion;
 
     /* function name */
     background: \u\72\l(image.png);