Use features to prevent the util component from entraining the world in GeckoLib builds.

components/util/str.rs

@@ -5,23 +5,15 @@
 use app_units::Au;
 use cssparser::{self, Color, RGBA};
 use euclid::num::Zero;
-use js::conversions::{FromJSValConvertible, ToJSValConvertible, latin1_to_string};
-use js::jsapi::{JSContext, JSString, HandleValue, MutableHandleValue};
-use js::jsapi::{JS_GetTwoByteStringCharsAndLength, JS_StringHasLatin1Chars};
-use js::rust::ToString;
 use libc::c_char;
 use num_lib::ToPrimitive;
-use opts;
 use std::ascii::AsciiExt;
 use std::borrow::ToOwned;
-use std::char;
 use std::convert::AsRef;
 use std::ffi::CStr;
 use std::fmt;
 use std::iter::{Filter, Peekable};
 use std::ops::{Deref, DerefMut};
-use std::ptr;
-use std::slice;
 use std::str::{CharIndices, FromStr, Split, from_utf8};
 
 #[derive(Clone, PartialOrd, Ord, PartialEq, Eq, Deserialize, Serialize, Hash, Debug)]
@@ -33,6 +25,9 @@ impl DOMString {
     pub fn new() -> DOMString {
         DOMString(String::new())
     }
+    pub fn from_string(s: String) -> DOMString {
+        DOMString(s)
+    }
     // FIXME(ajeffrey): implement more of the String methods on DOMString?
     pub fn push_str(&mut self, string: &str) {
         self.0.push_str(string)
@@ -113,82 +108,6 @@ impl Into<Vec<u8>> for DOMString {
     }
 }
 
-// https://heycam.github.io/webidl/#es-DOMString
-impl ToJSValConvertible for DOMString {
-    unsafe fn to_jsval(&self, cx: *mut JSContext, rval: MutableHandleValue) {
-        (**self).to_jsval(cx, rval);
-    }
-}
-
-/// Behavior for stringification of `JSVal`s.
-#[derive(PartialEq)]
-pub enum StringificationBehavior {
-    /// Convert `null` to the string `"null"`.
-    Default,
-    /// Convert `null` to the empty string.
-    Empty,
-}
-
-/// Convert the given `JSString` to a `DOMString`. Fails if the string does not
-/// contain valid UTF-16.
-pub unsafe fn jsstring_to_str(cx: *mut JSContext, s: *mut JSString) -> DOMString {
-    let latin1 = JS_StringHasLatin1Chars(s);
-    DOMString(if latin1 {
-        latin1_to_string(cx, s)
-    } else {
-        let mut length = 0;
-        let chars = JS_GetTwoByteStringCharsAndLength(cx, ptr::null(), s, &mut length);
-        assert!(!chars.is_null());
-        let potentially_ill_formed_utf16 = slice::from_raw_parts(chars, length as usize);
-        let mut s = String::with_capacity(length as usize);
-        for item in char::decode_utf16(potentially_ill_formed_utf16.iter().cloned()) {
-            match item {
-                Ok(c) => s.push(c),
-                Err(_) => {
-                    // FIXME: Add more info like document URL in the message?
-                    macro_rules! message {
-                        () => {
-                            "Found an unpaired surrogate in a DOM string. \
-                             If you see this in real web content, \
-                             please comment on https://github.com/servo/servo/issues/6564"
-                        }
-                    }
-                    if opts::get().replace_surrogates {
-                        error!(message!());
-                        s.push('\u{FFFD}');
-                    } else {
-                        panic!(concat!(message!(), " Use `-Z replace-surrogates` \
-                            on the command line to make this non-fatal."));
-                    }
-                }
-            }
-        }
-        s
-    })
-}
-
-// https://heycam.github.io/webidl/#es-DOMString
-impl FromJSValConvertible for DOMString {
-    type Config = StringificationBehavior;
-    unsafe fn from_jsval(cx: *mut JSContext,
-                         value: HandleValue,
-                         null_behavior: StringificationBehavior)
-                         -> Result<DOMString, ()> {
-        if null_behavior == StringificationBehavior::Empty &&
-           value.get().is_null() {
-            Ok(DOMString::new())
-        } else {
-            let jsstr = ToString(cx, value);
-            if jsstr.is_null() {
-                debug!("ToString failed");
-                Err(())
-            } else {
-                Ok(jsstring_to_str(cx, jsstr))
-            }
-        }
-    }
-}
-
 impl Extend<char> for DOMString {
     fn extend<I>(&mut self, iterable: I) where I: IntoIterator<Item=char> {
         self.0.extend(iterable)