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Auto merge of #18506 - mrobinson:position-sticky-table, r=emilio

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Fix issues with the combination of position:sticky and tables

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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [ ] These changes fix #18441 (github issue number if applicable).

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- [ ] These changes do not require tests because _____

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This commit is contained in:
bors-servo 2017-09-18 04:18:17 -05:00 • committed by GitHub
commit 1da581f49b
11 changed files with 81 additions and 33 deletions
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45
components/layout/display_list_builder.rs
View file

@ -103,11 +103,10 @@ fn convert_repeat_mode(from: RepeatKeyword) -> RepeatMode {
}
}
fn establishes_containing_block_for_absolute(can_establish_containing_block: EstablishContainingBlock,
fn establishes_containing_block_for_absolute(flags: StackingContextCollectionFlags,
positioning: position::T)
-> bool {
can_establish_containing_block == EstablishContainingBlock::Yes &&
position::T::static_ != positioning
!flags.contains(NEVER_CREATES_CONTAINING_BLOCK) && position::T::static_ != positioning
}
trait RgbColor {
@ -2346,16 +2345,19 @@ impl FragmentDisplayListBuilding for Fragment {
}
}
#[derive(Clone, Copy, PartialEq)]
pub enum EstablishContainingBlock {
Yes,
No,
bitflags! {
pub flags StackingContextCollectionFlags: u8 {
/// This flow never establishes a containing block.
const NEVER_CREATES_CONTAINING_BLOCK = 0x01,
/// This flow never creates a ClipScrollNode.
const NEVER_CREATES_CLIP_SCROLL_NODE = 0x02,
}
}
pub trait BlockFlowDisplayListBuilding {
fn collect_stacking_contexts_for_block(&mut self,
state: &mut StackingContextCollectionState,
can_establish_containing_block: EstablishContainingBlock);
flags: StackingContextCollectionFlags);
fn transform_clip_to_coordinate_space(&mut self,
state: &mut StackingContextCollectionState,
@ -2364,7 +2366,7 @@ pub trait BlockFlowDisplayListBuilding {
state: &mut StackingContextCollectionState,
preserved_state: &mut SavedStackingContextCollectionState,
stacking_context_type: BlockStackingContextType,
can_establish_containing_block: EstablishContainingBlock)
flags: StackingContextCollectionFlags)
-> ClipAndScrollInfo;
fn setup_clip_scroll_node_for_position(&mut self,
state: &mut StackingContextCollectionState,
@ -2521,7 +2523,7 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
fn collect_stacking_contexts_for_block(&mut self,
state: &mut StackingContextCollectionState,
can_establish_containing_block: EstablishContainingBlock) {
flags: StackingContextCollectionFlags) {
let mut preserved_state = SavedStackingContextCollectionState::new(state);
let block_stacking_context_type = self.block_stacking_context_type();
@ -2544,10 +2546,9 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
self.setup_clipping_for_block(state,
&mut preserved_state,
block_stacking_context_type,
can_establish_containing_block);
flags);
if establishes_containing_block_for_absolute(can_establish_containing_block,
self.positioning()) {
if establishes_containing_block_for_absolute(flags, self.positioning()) {
state.containing_block_clip_and_scroll_info = state.current_clip_and_scroll_info;
}
@ -2574,7 +2575,7 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
state: &mut StackingContextCollectionState,
preserved_state: &mut SavedStackingContextCollectionState,
stacking_context_type: BlockStackingContextType,
can_establish_containing_block: EstablishContainingBlock)
flags: StackingContextCollectionFlags)
-> ClipAndScrollInfo {
// If this block is absolutely positioned, we should be clipped and positioned by
// the scroll root of our nearest ancestor that establishes a containing block.
@ -2602,14 +2603,17 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
self.transform_clip_to_coordinate_space(state, preserved_state);
}
self.setup_clip_scroll_node_for_position(state, &stacking_relative_border_box);
self.setup_clip_scroll_node_for_overflow(state, &stacking_relative_border_box);
self.setup_clip_scroll_node_for_css_clip(state, preserved_state, &stacking_relative_border_box);
if !flags.contains(NEVER_CREATES_CLIP_SCROLL_NODE) {
self.setup_clip_scroll_node_for_position(state, &stacking_relative_border_box);
self.setup_clip_scroll_node_for_overflow(state, &stacking_relative_border_box);
self.setup_clip_scroll_node_for_css_clip(state, preserved_state,
&stacking_relative_border_box);
}
self.base.clip = state.clip_stack.last().cloned().unwrap_or_else(max_rect);
// We keep track of our position so that any stickily positioned elements can
// properly determine the extent of their movement relative to scrolling containers.
if can_establish_containing_block == EstablishContainingBlock::Yes {
if !flags.contains(NEVER_CREATES_CONTAINING_BLOCK) {
let border_box = if self.fragment.establishes_stacking_context() {
stacking_relative_border_box
} else {
@ -2678,6 +2682,9 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
let new_clip_scroll_node_id = ClipId::new(self.fragment.unique_id(IdType::OverflowClip),
state.pipeline_id.to_webrender());
if state.has_clip_scroll_node(new_clip_scroll_node_id) {
return;
}
let parent_id = self.clip_and_scroll_info(state.pipeline_id).scroll_node_id;
state.add_clip_scroll_node(
ClipScrollNode {
@ -2928,7 +2935,7 @@ impl InlineFlowDisplayListBuilding for InlineFlow {
for fragment in self.fragments.fragments.iter_mut() {
let previous_cb_clip_scroll_info = state.containing_block_clip_and_scroll_info;
if establishes_containing_block_for_absolute(EstablishContainingBlock::Yes,
if establishes_containing_block_for_absolute(StackingContextCollectionFlags::empty(),
fragment.style.get_box().position) {
state.containing_block_clip_and_scroll_info = state.current_clip_and_scroll_info;
}