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/* 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/. */
#![comment = "The Servo Parallel Browser Project"]
#![license = "MPL"]
extern crate geom;
extern crate servo_msg = "msg";
extern crate servo_net = "net";
extern crate url;
extern crate std;
extern crate serialize;
// This module contains traits in script used generically
// in the rest of Servo.
// The traits are here instead of in layout so
// that these modules won't have to depend on script.
use servo_msg::constellation_msg::{ConstellationChan, PipelineId, Failure, WindowSizeData};
use servo_msg::constellation_msg::SubpageId;
use servo_msg::compositor_msg::ScriptListener;
use servo_net::image_cache_task::ImageCacheTask;
use servo_net::resource_task::ResourceTask;
use std::any::Any;
use url::Url;
use geom::point::Point2D;
use serialize::{Encodable, Encoder};
pub struct NewLayoutInfo {
pub old_pipeline_id: PipelineId,
pub new_pipeline_id: PipelineId,
pub subpage_id: SubpageId,
pub layout_chan: Box<Any+Send>, // opaque reference to a LayoutChannel
}
/// Messages sent from the constellation to the script task
pub enum ConstellationControlMsg {
/// Loads a new URL on the specified pipeline.
LoadMsg(PipelineId, Url),
/// Gives a channel and ID to a layout task, as well as the ID of that layout's parent
AttachLayoutMsg(NewLayoutInfo),
/// Window resized. Sends a DOM event eventually, but first we combine events.
ResizeMsg(PipelineId, WindowSizeData),
/// Notifies script that window has been resized but to not take immediate action.
ResizeInactiveMsg(PipelineId, WindowSizeData),
/// Notifies the script that a pipeline should be closed.
ExitPipelineMsg(PipelineId),
/// Sends a DOM event.
SendEventMsg(PipelineId, CompositorEvent),
/// Notifies script that reflow is finished.
ReflowCompleteMsg(PipelineId, uint),
}
/// Events from the compositor that the script task needs to know about
pub enum CompositorEvent {
ResizeEvent(WindowSizeData),
ReflowEvent,
ClickEvent(uint, Point2D<f32>),
MouseDownEvent(uint, Point2D<f32>),
MouseUpEvent(uint, Point2D<f32>),
MouseMoveEvent(Point2D<f32>)
}
/// An opaque wrapper around script<->layout channels to avoid leaking message types into
/// crates that don't need to know about them.
pub struct OpaqueScriptLayoutChannel(pub (Box<Any+Send>, Box<Any+Send>));
/// Encapsulates external communication with the script task.
#[deriving(Clone)]
pub struct ScriptControlChan(pub Sender<ConstellationControlMsg>);
impl<S: Encoder<E>, E> Encodable<S, E> for ScriptControlChan {
fn encode(&self, _s: &mut S) -> Result<(), E> {
Ok(())
}
}
pub trait ScriptTaskFactory {
fn create<C: ScriptListener + Send>(_phantom: Option<&mut Self>,
id: PipelineId,
compositor: Box<C>,
layout_chan: &OpaqueScriptLayoutChannel,
control_chan: ScriptControlChan,
control_port: Receiver<ConstellationControlMsg>,
constellation_msg: ConstellationChan,
failure_msg: Failure,
resource_task: ResourceTask,
image_cache_task: ImageCacheTask,
window_size: WindowSizeData);
fn create_layout_channel(_phantom: Option<&mut Self>) -> OpaqueScriptLayoutChannel;
fn clone_layout_channel(_phantom: Option<&mut Self>, pair: &OpaqueScriptLayoutChannel) -> Box<Any+Send>;
}
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