Move Epoch to gfx_traits

Resolves #9222. Moved Epoch from components/msg/compositor_msg to
components/gfx_traits/lib. Updated use statements to reflect the move.

components/compositing/compositor.rs

@@ -14,7 +14,7 @@ use euclid::scale_factor::ScaleFactor;
 use euclid::size::TypedSize2D;
 use euclid::{Matrix4, Point2D, Rect, Size2D};
 use gfx::paint_thread::{ChromeToPaintMsg, PaintRequest};
-use gfx_traits::{color, LayerId, LayerKind, LayerProperties, ScrollPolicy};
+use gfx_traits::{color, Epoch, LayerId, LayerKind, LayerProperties, ScrollPolicy};
 use gleam::gl;
 use gleam::gl::types::{GLint, GLsizei};
 use image::{DynamicImage, ImageFormat, RgbImage};
@@ -27,7 +27,7 @@ use layers::rendergl;
 use layers::rendergl::RenderContext;
 use layers::scene::Scene;
 use layout_traits::LayoutControlChan;
-use msg::compositor_msg::{Epoch, FrameTreeId};
+use msg::compositor_msg::FrameTreeId;
 use msg::constellation_msg::{AnimationState, Image, PixelFormat};
 use msg::constellation_msg::{Key, KeyModifiers, KeyState, LoadData, MouseButton};
 use msg::constellation_msg::{NavigationDirection, PipelineId, WindowSizeData};

components/compositing/compositor_layer.rs

@@ -8,11 +8,10 @@ use euclid::length::Length;
 use euclid::point::{Point2D, TypedPoint2D};
 use euclid::rect::Rect;
 use euclid::size::TypedSize2D;
-use gfx_traits::{LayerId, LayerProperties, ScrollPolicy};
+use gfx_traits::{Epoch, LayerId, LayerProperties, ScrollPolicy};
 use layers::color::Color;
 use layers::geometry::LayerPixel;
 use layers::layers::{Layer, LayerBufferSet};
-use msg::compositor_msg::Epoch;
 use msg::constellation_msg::{MouseEventType, PipelineId};
 use script_traits::CompositorEvent;
 use script_traits::CompositorEvent::{MouseButtonEvent, MouseMoveEvent};

components/compositing/compositor_thread.rs

@@ -8,12 +8,12 @@ use CompositorMsg as ConstellationMsg;
 use compositor;
 use euclid::point::Point2D;
 use euclid::size::Size2D;
-use gfx_traits::{LayerId, LayerProperties, PaintListener};
+use gfx_traits::{Epoch, LayerId, LayerProperties, PaintListener};
 use headless;
 use ipc_channel::ipc::{self, IpcReceiver, IpcSender};
 use layers::layers::{BufferRequest, LayerBufferSet};
 use layers::platform::surface::{NativeDisplay, NativeSurface};
-use msg::compositor_msg::{Epoch, FrameTreeId};
+use msg::compositor_msg::FrameTreeId;
 use msg::constellation_msg::{AnimationState, PipelineId};
 use msg::constellation_msg::{Image, Key, KeyModifiers, KeyState};
 use profile_traits::mem;

components/compositing/constellation.rs

@@ -22,11 +22,10 @@ use euclid::size::{Size2D, TypedSize2D};
 use gaol;
 use gaol::sandbox::{self, Sandbox, SandboxMethods};
 use gfx::font_cache_thread::FontCacheThread;
-use gfx_traits::PaintMsg as FromPaintMsg;
+use gfx_traits::{Epoch, PaintMsg as FromPaintMsg};
 use ipc_channel::ipc::{self, IpcOneShotServer, IpcSender};
 use ipc_channel::router::ROUTER;
 use layout_traits::{LayoutControlChan, LayoutThreadFactory};
-use msg::compositor_msg::Epoch;
 use msg::constellation_msg::AnimationState;
 use msg::constellation_msg::WebDriverCommandMsg;
 use msg::constellation_msg::{DocumentState, FrameId, PipelineId};

components/compositing/lib.rs

@@ -53,8 +53,8 @@ extern crate util;
 pub use compositor_thread::{CompositorEventListener, CompositorProxy, CompositorThread};
 pub use constellation::Constellation;
 use euclid::size::{Size2D};
+use gfx_traits::Epoch;
 use ipc_channel::ipc::{IpcSender};
-use msg::compositor_msg::Epoch;
 use msg::constellation_msg::{FrameId, Key, KeyState, KeyModifiers, LoadData};
 use msg::constellation_msg::{NavigationDirection, PipelineId, SubpageId};
 use msg::constellation_msg::{WebDriverCommandMsg, WindowSizeData};

components/gfx/paint_thread.rs

@@ -15,11 +15,12 @@ use euclid::rect::Rect;
 use euclid::size::Size2D;
 use font_cache_thread::FontCacheThread;
 use font_context::FontContext;
-use gfx_traits::{color, LayerId, LayerKind, LayerProperties, PaintListener, PaintMsg as ConstellationMsg, ScrollPolicy};
+use gfx_traits::color;
+use gfx_traits::{Epoch, LayerId, LayerKind, LayerProperties, PaintListener, PaintMsg as ConstellationMsg, ScrollPolicy};
 use ipc_channel::ipc::IpcSender;
 use layers::layers::{BufferRequest, LayerBuffer, LayerBufferSet};
 use layers::platform::surface::{NativeDisplay, NativeSurface};
-use msg::compositor_msg::{Epoch, FrameTreeId};
+use msg::compositor_msg::FrameTreeId;
 use msg::constellation_msg::{ConstellationChan, Failure, PipelineId};
 use paint_context::PaintContext;
 use profile_traits::mem::{self, ReportsChan};

components/gfx_traits/lib.rs

@@ -125,3 +125,14 @@ pub struct LayerProperties {
     /// Whether this layer scrolls its overflow area.
     pub scrolls_overflow_area: bool,
 }
+
+/// A newtype struct for denoting the age of messages; prevents race conditions.
+#[derive(PartialEq, Eq, Debug, Copy, Clone, PartialOrd, Ord, Deserialize, Serialize)]
+pub struct Epoch(pub u32);
+
+impl Epoch {
+    pub fn next(&mut self) {
+        let Epoch(ref mut u) = *self;
+        *u += 1;
+    }
+}

components/gfx_traits/paint_listener.rs

@@ -2,11 +2,12 @@
  * 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 Epoch;
 use LayerId;
 use LayerProperties;
 use layers::layers::{BufferRequest, LayerBufferSet};
 use layers::platform::surface::NativeDisplay;
-use msg::compositor_msg::{Epoch, FrameTreeId};
+use msg::compositor_msg::FrameTreeId;
 use msg::constellation_msg::PipelineId;
 
 /// The interface used by the painter to acquire draw targets for each paint frame and

components/layout/layout_thread.rs

@@ -27,7 +27,7 @@ use gfx::font;
 use gfx::font_cache_thread::FontCacheThread;
 use gfx::font_context;
 use gfx::paint_thread::{LayoutToPaintMsg, PaintLayer};
-use gfx_traits::{color, LayerId, ScrollPolicy};
+use gfx_traits::{color, Epoch, LayerId, ScrollPolicy};
 use incremental::{LayoutDamageComputation, REFLOW, REFLOW_ENTIRE_DOCUMENT, REPAINT};
 use ipc_channel::ipc::{self, IpcReceiver, IpcSender};
 use ipc_channel::router::ROUTER;
@@ -35,7 +35,6 @@ use layout_debug;
 use layout_traits::LayoutThreadFactory;
 use log;
 use msg::ParseErrorReporter;
-use msg::compositor_msg::Epoch;
 use msg::constellation_msg::{ConstellationChan, Failure, PipelineId};
 use net_traits::image_cache_thread::{ImageCacheChan, ImageCacheResult, ImageCacheThread};
 use parallel;

components/msg/compositor_msg.rs

@@ -2,17 +2,6 @@
  * 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/. */
 
-/// A newtype struct for denoting the age of messages; prevents race conditions.
-#[derive(PartialEq, Eq, Debug, Copy, Clone, PartialOrd, Ord, Deserialize, Serialize)]
-pub struct Epoch(pub u32);
-
-impl Epoch {
-    pub fn next(&mut self) {
-        let Epoch(ref mut u) = *self;
-        *u += 1;
-    }
-}
-
 #[derive(PartialEq, Eq, Debug, Copy, Clone)]
 pub struct FrameTreeId(pub u32);
 

components/script/layout_interface.rs

@@ -10,9 +10,8 @@ use app_units::Au;
 use dom::node::OpaqueStyleAndLayoutData;
 use euclid::point::Point2D;
 use euclid::rect::Rect;
-use gfx_traits::LayerId;
+use gfx_traits::{Epoch, LayerId};
 use ipc_channel::ipc::{IpcReceiver, IpcSender};
-use msg::compositor_msg::Epoch;
 use msg::constellation_msg::{ConstellationChan, Failure, PipelineId};
 use msg::constellation_msg::{WindowSizeData};
 use net_traits::image_cache_thread::ImageCacheThread;

components/script_traits/lib.rs

@@ -35,10 +35,10 @@ use euclid::Size2D;
 use euclid::length::Length;
 use euclid::point::Point2D;
 use euclid::rect::Rect;
+use gfx_traits::Epoch;
 use gfx_traits::LayerId;
 use ipc_channel::ipc::{IpcReceiver, IpcSender};
 use libc::c_void;
-use msg::compositor_msg::Epoch;
 use msg::constellation_msg::{ConstellationChan, Failure, PipelineId, WindowSizeData};
 use msg::constellation_msg::{Key, KeyModifiers, KeyState, LoadData, SubpageId};
 use msg::constellation_msg::{MouseButton, MouseEventType};