Implement Clone for Copy types.

components/gfx/buffer_map.rs

@@ -26,7 +26,7 @@ pub struct BufferMap {
 }
 
 /// A key with which to store buffers. It is based on the size of the buffer.
-#[derive(Eq, Copy)]
+#[derive(Eq, Copy, Clone)]
 struct BufferKey([usize; 2]);
 
 impl Hash for BufferKey {

components/gfx/paint_context.rs

@@ -57,7 +57,7 @@ pub struct PaintContext<'a> {
     pub transient_clip: Option<ClippingRegion>,
 }
 
-#[derive(Copy)]
+#[derive(Copy, Clone)]
 enum Direction {
     Top,
     Left,
@@ -65,7 +65,7 @@ enum Direction {
     Bottom
 }
 
-#[derive(Copy)]
+#[derive(Copy, Clone)]
 enum DashSize {
     DottedBorder = 1,
     DashedBorder = 3

components/gfx/text/glyph.rs

@@ -87,7 +87,7 @@ impl GlyphEntry {
 pub type GlyphId = u32;
 
 // TODO: unify with bit flags?
-#[derive(PartialEq, Copy)]
+#[derive(PartialEq, Copy, Clone)]
 pub enum BreakType {
     None,
     Normal,
@@ -415,7 +415,7 @@ impl<'a> DetailedGlyphStore {
 
 // This struct is used by GlyphStore clients to provide new glyph data.
 // It should be allocated on the stack and passed by reference to GlyphStore.
-#[derive(Copy)]
+#[derive(Copy, Clone)]
 pub struct GlyphData {
     id: GlyphId,
     advance: Au,
@@ -449,7 +449,7 @@ impl GlyphData {
 // through glyphs (either for a particular TextRun offset, or all glyphs).
 // Rather than eagerly assembling and copying glyph data, it only retrieves
 // values as they are needed from the GlyphStore, using provided offsets.
-#[derive(Copy)]
+#[derive(Copy, Clone)]
 pub enum GlyphInfo<'a> {
     Simple(&'a GlyphStore, CharIndex),
     Detail(&'a GlyphStore, CharIndex, u16),

components/gfx/text/util.rs

@@ -2,7 +2,7 @@
  * 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/. */
 
-#[derive(PartialEq, Eq, Copy)]
+#[derive(PartialEq, Eq, Copy, Clone)]
 pub enum CompressionMode {
     CompressNone,
     CompressWhitespace,