Implement drawing an image from a CSS style value into a canvas.

1 files changed, 16 insertions, 0 deletions

diff --git a/components/script/dom/cssstylevalue.rs b/components/script/dom/cssstylevalue.rs
index 7ee9d5509f0..adc70ed7972 100644
--- a/components/script/dom/cssstylevalue.rs
+++ b/components/script/dom/cssstylevalue.rs
@@ -2,6 +2,8 @@
  * 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 cssparser::ParserInput;
 use dom::bindings::codegen::Bindings::CSSStyleValueBinding::CSSStyleValueMethods;
 use dom::bindings::codegen::Bindings::CSSStyleValueBinding::Wrap;
 use dom::bindings::js::Root;
@@ -10,6 +12,7 @@ use dom::bindings::reflector::reflect_dom_object;
 use dom::bindings::str::DOMString;
 use dom::globalscope::GlobalScope;
 use dom_struct::dom_struct;
+use servo_url::ServoUrl;
 
 #[dom_struct]
 pub struct CSSStyleValue {
@@ -44,3 +47,16 @@ impl CSSStyleValueMethods for CSSStyleValue {
         self.Stringifier()
     }
 }
+
+impl CSSStyleValue {
+    /// Parse the value as a `url()`.
+    /// TODO: This should really always be an absolute URL, but we currently
+    /// return relative URLs for computed values, so we pass in a base.
+    /// https://github.com/servo/servo/issues/17625
+    pub fn get_url(&self, base_url: ServoUrl) -> Option<ServoUrl> {
+        let mut input = ParserInput::new(&*self.value);
+        let mut parser = Parser::new(&mut input);
+        parser.expect_url().ok()
+            .and_then(|string| base_url.join(&*string).ok())
+    }
+}