Cargoify servo

src/components/layout/layout_debug.rs

@@ -1,126 +0,0 @@
-/* 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/. */
-
-//! Supports writing a trace file created during each layout scope
-//! that can be viewed by an external tool to make layout debugging easier.
-
-#![macro_escape]
-
-use flow_ref::FlowRef;
-use serialize::json;
-use std::cell::RefCell;
-use std::io::File;
-use std::sync::atomics::{AtomicUint, SeqCst, INIT_ATOMIC_UINT};
-
-local_data_key!(state_key: RefCell<State>)
-
-static mut DEBUG_ID_COUNTER: AtomicUint = INIT_ATOMIC_UINT;
-
-pub struct Scope;
-
-#[macro_export]
-macro_rules! layout_debug_scope(
-    ($($arg:tt)*) => (
-        if cfg!(not(ndebug)) {
-            layout_debug::Scope::new(format!($($arg)*))
-        } else {
-            layout_debug::Scope
-        }
-    )
-)
-
-#[deriving(Encodable)]
-struct ScopeData {
-    name: String,
-    pre: String,
-    post: String,
-    children: Vec<Box<ScopeData>>,
-}
-
-impl ScopeData {
-    fn new(name: String, pre: String) -> ScopeData {
-        ScopeData {
-            name: name,
-            pre: pre,
-            post: String::new(),
-            children: vec!(),
-        }
-    }
-}
-
-struct State {
-    flow_root: FlowRef,
-    scope_stack: Vec<Box<ScopeData>>,
-}
-
-/// A layout debugging scope. The entire state of the flow tree
-/// will be output at the beginning and end of this scope.
-impl Scope {
-    pub fn new(name: String) -> Scope {
-        let maybe_refcell = state_key.get();
-        match maybe_refcell {
-            Some(refcell) => {
-                let mut state = refcell.borrow_mut();
-                let flow_trace = json::encode(&state.flow_root.get());
-                let data = box ScopeData::new(name, flow_trace);
-                state.scope_stack.push(data);
-            }
-            None => {}
-        }
-        Scope
-    }
-}
-
-#[cfg(not(ndebug))]
-impl Drop for Scope {
-    fn drop(&mut self) {
-        let maybe_refcell = state_key.get();
-        match maybe_refcell {
-            Some(refcell) => {
-                let mut state = refcell.borrow_mut();
-                let mut current_scope = state.scope_stack.pop().unwrap();
-                current_scope.post = json::encode(&state.flow_root.get());
-                let previous_scope = state.scope_stack.mut_last().unwrap();
-                previous_scope.children.push(current_scope);
-            }
-            None => {}
-        }
-    }
-}
-
-/// Generate a unique ID. This is used for items such as Fragment
-/// which are often reallocated but represent essentially the
-/// same data.
-pub fn generate_unique_debug_id() -> uint {
-    unsafe { DEBUG_ID_COUNTER.fetch_add(1, SeqCst) }
-}
-
-/// Begin a layout debug trace. If this has not been called,
-/// creating debug scopes has no effect.
-pub fn begin_trace(flow_root: FlowRef) {
-    assert!(state_key.get().is_none());
-
-    let flow_trace = json::encode(&flow_root.get());
-    let state = State {
-        scope_stack: vec![box ScopeData::new("root".to_string(), flow_trace)],
-        flow_root: flow_root,
-    };
-    state_key.replace(Some(RefCell::new(state)));
-}
-
-/// End the debug layout trace. This will write the layout
-/// trace to disk in the current directory. The output
-/// file can then be viewed with an external tool.
-pub fn end_trace() {
-    let task_state_cell = state_key.replace(None).unwrap();
-    let mut task_state = task_state_cell.borrow_mut();
-    assert!(task_state.scope_stack.len() == 1);
-    let mut root_scope = task_state.scope_stack.pop().unwrap();
-    root_scope.post = json::encode(&task_state.flow_root.get());
-
-    let result = json::encode(&root_scope);
-    let path = Path::new("layout_trace.json");
-    let mut file = File::create(&path).unwrap();
-    file.write_str(result.as_slice()).unwrap();
-}