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minor FP-style function refactor

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This commit is contained in:
Tim Kuehn 2013-07-31 19:54:07 -07:00
parent c3d19c531b
commit 95f71f8fb9
1 changed files with 11 additions and 19 deletions
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30
src/components/main/constellation.rs
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@ -51,14 +51,13 @@ struct FrameTree {
// Need to clone the FrameTrees, but _not_ the Pipelines
impl Clone for FrameTree {
fn clone(&self) -> FrameTree {
let mut children = ~[];
for self.children.iter().advance |&frame_tree| {
children.push(@mut (*frame_tree).clone());
}
let mut children = do self.children.iter().transform |&frame_tree| {
@mut (*frame_tree).clone()
};
FrameTree {
pipeline: self.pipeline,
parent: self.parent.clone(),
children: children,
children: children.collect(),
}
}
}
@ -88,11 +87,10 @@ impl FrameTree {
/// Returns the frame tree whose key is id
fn find_mut(@mut self, id: PipelineId) -> Option<@mut FrameTree> {
if self.pipeline.id == id { return Some(self); }
for self.children.iter().advance |frame_tree| {
let found = frame_tree.find_mut(id);
if found.is_some() { return found; }
}
None
let mut finder = do self.children.iter().filter_map |frame_tree| {
frame_tree.find_mut(id)
};
finder.next()
}
/// Replaces a node of the frame tree in place. Returns the node that was removed or the original node
@ -115,14 +113,10 @@ impl FrameTree {
}
fn to_sendable(&self) -> SendableFrameTree {
let mut sendable_frame_tree = SendableFrameTree {
let sendable_frame_tree = SendableFrameTree {
pipeline: (*self.pipeline).clone(),
children: ~[],
children: self.children.iter().transform(|frame_tree| frame_tree.to_sendable()).collect(),
};
for self.children.iter().advance |frame_tree| {
sendable_frame_tree.children.push(frame_tree.to_sendable());
}
sendable_frame_tree
}
@ -141,9 +135,7 @@ impl Iterator<@mut FrameTree> for FrameTreeIterator {
fn next(&mut self) -> Option<@mut FrameTree> {
if !self.stack.is_empty() {
let next = self.stack.pop();
for next.children.iter().advance |&child| {
self.stack.push(child);
}
self.stack.push_all(next.children);
Some(next)
} else {
None