style: Move -moz-force-broken-image-icon out of mako

components/style/values/specified/ui.rs

@@ -0,0 +1,54 @@
+/* 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/. */
+
+//! Specified types for UI properties.
+
+use cssparser::Parser;
+use parser::{Parse, ParserContext};
+use std::fmt;
+use style_traits::{ParseError, StyleParseErrorKind, ToCss};
+
+/// Specified value of `-moz-force-broken-image-icon`
+#[derive(Clone, Copy, Debug, MallocSizeOf, PartialEq, ToComputedValue)]
+pub struct MozForceBrokenImageIcon(pub bool);
+
+impl MozForceBrokenImageIcon {
+    /// Return initial value of -moz-force-broken-image-icon which is false.
+    #[inline]
+    pub fn false_value() -> MozForceBrokenImageIcon {
+        MozForceBrokenImageIcon(false)
+    }
+}
+
+impl Parse for MozForceBrokenImageIcon {
+    fn parse<'i, 't>(
+        _context: &ParserContext,
+        input: &mut Parser<'i, 't>
+    ) -> Result<MozForceBrokenImageIcon, ParseError<'i>> {
+        // We intentionally don't support calc values here.
+        match input.expect_integer()? {
+            0 => Ok(MozForceBrokenImageIcon(false)),
+            1 => Ok(MozForceBrokenImageIcon(true)),
+            _ => Err(input.new_custom_error(StyleParseErrorKind::UnspecifiedError)),
+        }
+    }
+}
+
+impl ToCss for MozForceBrokenImageIcon {
+    fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
+        dest.write_str(if self.0 { "1" } else { "0" })
+    }
+}
+
+impl From<u8> for MozForceBrokenImageIcon {
+    fn from(bits: u8) -> MozForceBrokenImageIcon {
+        MozForceBrokenImageIcon(bits == 1)
+    }
+}
+
+impl From<MozForceBrokenImageIcon> for u8 {
+    fn from(v: MozForceBrokenImageIcon) -> u8 {
+        if v.0 { 1 } else { 0 }
+    }
+}