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Layout 2020 skeleton for display: flex, behind a pref
This commit is contained in:
Simon Sapin
parent
d4f1f4641d
commit
64124f7a5e
8 changed files with 114 additions and 18 deletions
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@ -454,6 +454,9 @@ mod gen {
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columns: {
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enabled: bool,
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},
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flexbox: {
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enabled: bool,
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},
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#[serde(default = "default_layout_threads")]
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threads: i64,
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viewport: {
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62
components/layout_2020/flexbox.rs
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62
components/layout_2020/flexbox.rs
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@ -0,0 +1,62 @@
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use crate::context::LayoutContext;
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use crate::dom_traversal::{NodeExt, NonReplacedContents};
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use crate::formatting_contexts::IndependentLayout;
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use crate::positioned::PositioningContext;
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use crate::sizing::{BoxContentSizes, ContentSizesRequest};
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use crate::ContainingBlock;
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use servo_arc::Arc;
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use style::properties::ComputedValues;
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use style::values::specified::text::TextDecorationLine;
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// FIXME: `min-width: auto` is not zero: https://drafts.csswg.org/css-flexbox/#min-size-auto
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#[derive(Debug, Serialize)]
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pub(crate) struct FlexContainer {
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unimplemented_fallback: crate::flow::BlockFormattingContext,
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}
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impl FlexContainer {
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pub fn construct<'dom>(
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context: &LayoutContext,
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node: impl NodeExt<'dom>,
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style: &Arc<ComputedValues>,
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contents: NonReplacedContents,
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content_sizes: ContentSizesRequest,
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propagated_text_decoration_line: TextDecorationLine,
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) -> (Self, BoxContentSizes) {
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let (unimplemented_fallback, content_sizes) =
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crate::flow::BlockFormattingContext::construct(
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context,
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node,
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style,
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contents,
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content_sizes,
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propagated_text_decoration_line,
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);
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(
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Self {
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unimplemented_fallback,
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},
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content_sizes,
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)
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}
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pub(crate) fn layout(
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&self,
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layout_context: &LayoutContext,
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positioning_context: &mut PositioningContext,
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containing_block: &ContainingBlock,
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tree_rank: usize,
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) -> IndependentLayout {
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self.unimplemented_fallback.layout(
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layout_context,
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positioning_context,
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containing_block,
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tree_rank,
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)
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}
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}
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@ -4,6 +4,7 @@
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use crate::context::LayoutContext;
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use crate::dom_traversal::{Contents, NodeExt};
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use crate::flexbox::FlexContainer;
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use crate::flow::BlockFormattingContext;
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use crate::fragments::Fragment;
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use crate::positioned::PositioningContext;
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@ -43,6 +44,7 @@ pub(crate) struct IndependentLayout {
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#[derive(Debug, Serialize)]
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enum IndependentFormattingContextContents {
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Flow(BlockFormattingContext),
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Flex(FlexContainer),
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// Not called FC in specs, but behaves close enough
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Replaced(ReplacedContent),
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@ -53,6 +55,7 @@ pub(crate) struct NonReplacedIFC<'a>(NonReplacedIFCKind<'a>);
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enum NonReplacedIFCKind<'a> {
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Flow(&'a BlockFormattingContext),
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Flex(&'a FlexContainer),
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}
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impl IndependentFormattingContext {
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@ -83,6 +86,22 @@ impl IndependentFormattingContext {
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contents: IndependentFormattingContextContents::Flow(bfc),
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}
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},
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DisplayInside::Flex => {
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let (fc, content_sizes) = FlexContainer::construct(
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context,
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node,
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&style,
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non_replaced,
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content_sizes,
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propagated_text_decoration_line,
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);
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Self {
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tag: node.as_opaque(),
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style,
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content_sizes,
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contents: IndependentFormattingContextContents::Flex(fc),
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}
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},
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},
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Err(replaced) => {
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let content_sizes = content_sizes.compute(|| replaced.inline_content_sizes(&style));
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@ -103,6 +122,7 @@ impl IndependentFormattingContext {
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match &self.contents {
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Contents::Replaced(r) => Ok(r),
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Contents::Flow(f) => Err(NR(Kind::Flow(f))),
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Contents::Flex(f) => Err(NR(Kind::Flex(f))),
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}
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}
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}
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@ -122,6 +142,12 @@ impl NonReplacedIFC<'_> {
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containing_block,
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tree_rank,
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),
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NonReplacedIFCKind::Flex(fc) => fc.layout(
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layout_context,
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positioning_context,
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containing_block,
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tree_rank,
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),
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}
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}
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}
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@ -15,6 +15,7 @@ pub mod data;
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pub mod display_list;
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mod dom_traversal;
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pub mod element_data;
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mod flexbox;
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mod flow;
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mod formatting_contexts;
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mod fragments;
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@ -48,6 +48,7 @@ pub(crate) enum DisplayOutside {
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pub(crate) enum DisplayInside {
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Flow,
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FlowRoot,
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Flex,
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}
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/// Percentages resolved but not `auto` margins
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@ -394,6 +395,7 @@ impl From<stylo::Display> for Display {
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let inside = match packed.inside() {
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stylo::DisplayInside::Flow => DisplayInside::Flow,
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stylo::DisplayInside::FlowRoot => DisplayInside::FlowRoot,
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stylo::DisplayInside::Flex => DisplayInside::Flex,
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// These should not be values of DisplayInside, but oh well
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stylo::DisplayInside::None => return Display::None,
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@ -34,6 +34,17 @@ fn moz_box_display_values_enabled(context: &ParserContext) -> bool {
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static_prefs::pref!("layout.css.xul-box-display-values.content.enabled")
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}
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fn flexbox_enabled() -> bool {
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if cfg!(feature = "servo-layout-2020") {
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servo_config::prefs::pref_map()
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.get("layout.flexbox.enabled")
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.as_bool()
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.unwrap_or(false)
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} else {
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true
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}
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}
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/// Defines an element’s display type, which consists of
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/// the two basic qualities of how an element generates boxes
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/// <https://drafts.csswg.org/css-display/#propdef-display>
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@ -63,7 +74,6 @@ pub enum DisplayInside {
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Contents,
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Flow,
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FlowRoot,
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#[cfg(any(feature = "servo-layout-2013", feature = "gecko"))]
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Flex,
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#[cfg(feature = "gecko")]
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Grid,
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@ -146,9 +156,7 @@ impl Display {
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pub const Block: Self = Self::new(DisplayOutside::Block, DisplayInside::Flow);
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#[cfg(feature = "gecko")]
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pub const FlowRoot: Self = Self::new(DisplayOutside::Block, DisplayInside::FlowRoot);
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#[cfg(any(feature = "servo-layout-2013", feature = "gecko"))]
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pub const Flex: Self = Self::new(DisplayOutside::Block, DisplayInside::Flex);
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#[cfg(any(feature = "servo-layout-2013", feature = "gecko"))]
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pub const InlineFlex: Self = Self::new(DisplayOutside::Inline, DisplayInside::Flex);
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#[cfg(feature = "gecko")]
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pub const Grid: Self = Self::new(DisplayOutside::Block, DisplayInside::Grid);
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@ -317,9 +325,9 @@ impl Display {
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#[inline]
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pub fn is_atomic_inline_level(&self) -> bool {
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match *self {
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Display::InlineBlock => true,
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Display::InlineBlock | Display::InlineFlex => true,
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#[cfg(any(feature = "servo-layout-2013"))]
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Display::InlineFlex | Display::InlineTable => true,
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Display::InlineTable => true,
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_ => false,
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}
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}
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@ -330,7 +338,6 @@ impl Display {
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/// This is used to implement various style fixups.
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pub fn is_item_container(&self) -> bool {
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match self.inside() {
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#[cfg(any(feature = "servo-layout-2013", feature = "gecko"))]
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DisplayInside::Flex => true,
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#[cfg(feature = "gecko")]
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DisplayInside::Grid => true,
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@ -432,12 +439,9 @@ impl ToCss for Display {
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_ => match (outside, inside) {
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#[cfg(feature = "gecko")]
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(DisplayOutside::Inline, DisplayInside::Grid) => dest.write_str("inline-grid"),
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(DisplayOutside::Inline, DisplayInside::Flex) => dest.write_str("inline-flex"),
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#[cfg(any(feature = "servo-layout-2013", feature = "gecko"))]
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(DisplayOutside::Inline, DisplayInside::Flex) |
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(DisplayOutside::Inline, DisplayInside::Table) => {
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dest.write_str("inline-")?;
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inside.to_css(dest)
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},
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(DisplayOutside::Inline, DisplayInside::Table) => dest.write_str("inline-table"),
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#[cfg(feature = "gecko")]
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(DisplayOutside::Block, DisplayInside::Ruby) => dest.write_str("block ruby"),
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(_, inside) => {
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@ -467,12 +471,11 @@ fn parse_display_inside<'i, 't>(
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) -> Result<DisplayInside, ParseError<'i>> {
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Ok(try_match_ident_ignore_ascii_case! { input,
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"flow" => DisplayInside::Flow,
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"flex" if flexbox_enabled() => DisplayInside::Flex,
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#[cfg(any(feature = "servo-layout-2020", feature = "gecko"))]
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"flow-root" => DisplayInside::FlowRoot,
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#[cfg(any(feature = "servo-layout-2013", feature = "gecko"))]
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"table" => DisplayInside::Table,
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#[cfg(any(feature = "servo-layout-2013", feature = "gecko"))]
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"flex" => DisplayInside::Flex,
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#[cfg(feature = "gecko")]
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"grid" => DisplayInside::Grid,
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#[cfg(feature = "gecko")]
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@ -575,10 +578,8 @@ impl Parse for Display {
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"inline-block" => Display::InlineBlock,
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#[cfg(any(feature = "servo-layout-2013", feature = "gecko"))]
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"inline-table" => Display::InlineTable,
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#[cfg(any(feature = "servo-layout-2013", feature = "gecko"))]
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"-webkit-flex" => Display::Flex,
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#[cfg(any(feature = "servo-layout-2013", feature = "gecko"))]
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"inline-flex" | "-webkit-inline-flex" => Display::InlineFlex,
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"-webkit-flex" if flexbox_enabled() => Display::Flex,
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"inline-flex" | "-webkit-inline-flex" if flexbox_enabled() => Display::InlineFlex,
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#[cfg(feature = "gecko")]
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"inline-grid" => Display::InlineGrid,
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#[cfg(any(feature = "servo-layout-2013", feature = "gecko"))]
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@ -88,6 +88,7 @@
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"js.werror.enabled": false,
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"layout.animations.test.enabled": false,
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"layout.columns.enabled": false,
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"layout.flexbox.enabled": false,
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"layout.threads": 3,
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"layout.viewport.enabled": false,
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"layout.writing-mode.enabled": false,
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@ -1 +1 @@
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prefs: ["layout.columns.enabled:true"]
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prefs: ["layout.columns.enabled:true", "layout.flexbox.enabled:true"]
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