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Allow dumping the fragment tree in layout_2020

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This is done when the dump-flow-tree debug option is passed.
This commit is contained in:
Martin Robinson 2020-01-13 13:00:26 +01:00
parent c6192dc286
commit ea8c635344
4 changed files with 100 additions and 5 deletions
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12
components/layout_thread_2020/lib.rs
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@ -213,6 +213,9 @@ pub struct LayoutThread {
/// Emits notifications when there is a relayout.
relayout_event: bool,
/// Dumps the fragment tree after a layout.
dump_fragment_tree: bool,
}
impl LayoutThreadFactory for LayoutThread {
@ -246,7 +249,7 @@ impl LayoutThreadFactory for LayoutThread {
relayout_event: bool,
_nonincremental_layout: bool,
_trace_layout: bool,
_dump_flow_tree: bool,
dump_flow_tree: bool,
) {
thread::Builder::new()
.name(format!("LayoutThread {:?}", id))
@ -287,6 +290,7 @@ impl LayoutThreadFactory for LayoutThread {
load_webfonts_synchronously,
window_size,
relayout_event,
dump_flow_tree,
);
let reporter_name = format!("layout-reporter-{}", id);
@ -449,6 +453,7 @@ impl LayoutThread {
load_webfonts_synchronously: bool,
window_size: WindowSizeData,
relayout_event: bool,
dump_fragment_tree: bool,
) -> LayoutThread {
// Let webrender know about this pipeline by sending an empty display list.
webrender_api_sender.send_initial_transaction(webrender_document, id.to_webrender());
@ -527,6 +532,7 @@ impl LayoutThread {
busy,
load_webfonts_synchronously,
relayout_event,
dump_fragment_tree,
}
}
@ -1292,6 +1298,10 @@ impl LayoutThread {
let mut display_list = DisplayListBuilder::new(self.id.to_webrender(), viewport_size);
fragment_tree.build_display_list(&mut display_list, viewport_size);
if self.dump_fragment_tree {
fragment_tree.print();
}
debug!("Layout done!");
let mut epoch = self.epoch.get();