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/* 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 https://mozilla.org/MPL/2.0/. */
use std::convert::TryInto;
use serde::Serialize;
use servo_arc::Arc;
use style::logical_geometry::WritingMode;
use style::properties::ComputedValues;
use style::values::computed::Length;
use style::values::specified::text::TextDecorationLine;
use crate::context::LayoutContext;
use crate::dom::NodeExt;
use crate::dom_traversal::{Contents, NodeAndStyleInfo};
use crate::flexbox::FlexContainer;
use crate::flow::BlockFormattingContext;
use crate::fragment_tree::{BaseFragmentInfo, Fragment};
use crate::positioned::PositioningContext;
use crate::replaced::ReplacedContent;
use crate::sizing::{self, ContentSizes};
use crate::style_ext::DisplayInside;
use crate::table::Table;
use crate::ContainingBlock;
/// https://drafts.csswg.org/css-display/#independent-formatting-context
#[derive(Debug, Serialize)]
pub(crate) enum IndependentFormattingContext {
NonReplaced(NonReplacedFormattingContext),
Replaced(ReplacedFormattingContext),
}
#[derive(Debug, Serialize)]
pub(crate) struct NonReplacedFormattingContext {
pub base_fragment_info: BaseFragmentInfo,
#[serde(skip_serializing)]
pub style: Arc<ComputedValues>,
/// If it was requested during construction
pub content_sizes: Option<ContentSizes>,
pub contents: NonReplacedFormattingContextContents,
}
#[derive(Debug, Serialize)]
pub(crate) struct ReplacedFormattingContext {
pub base_fragment_info: BaseFragmentInfo,
#[serde(skip_serializing)]
pub style: Arc<ComputedValues>,
pub contents: ReplacedContent,
}
// Private so that code outside of this module cannot match variants.
// It should got through methods instead.
#[derive(Debug, Serialize)]
pub(crate) enum NonReplacedFormattingContextContents {
Flow(BlockFormattingContext),
Flex(FlexContainer),
Table(Table),
// Other layout modes go here
}
pub(crate) struct IndependentLayout {
pub fragments: Vec<Fragment>,
/// https://drafts.csswg.org/css2/visudet.html#root-height
pub content_block_size: Length,
}
impl IndependentFormattingContext {
pub fn construct<'dom>(
context: &LayoutContext,
node_and_style_info: &NodeAndStyleInfo<impl NodeExt<'dom>>,
display_inside: DisplayInside,
contents: Contents,
propagated_text_decoration_line: TextDecorationLine,
) -> Self {
match contents.try_into() {
Ok(non_replaced_contents) => {
let contents = match display_inside {
DisplayInside::Flow { is_list_item } |
DisplayInside::FlowRoot { is_list_item } => {
NonReplacedFormattingContextContents::Flow(
BlockFormattingContext::construct(
context,
node_and_style_info,
non_replaced_contents,
propagated_text_decoration_line,
is_list_item,
),
)
},
DisplayInside::Flex => {
NonReplacedFormattingContextContents::Flex(FlexContainer::construct(
context,
node_and_style_info,
non_replaced_contents,
propagated_text_decoration_line,
))
},
DisplayInside::Table => {
NonReplacedFormattingContextContents::Table(Table::construct(
context,
node_and_style_info,
non_replaced_contents,
propagated_text_decoration_line,
))
},
};
Self::NonReplaced(NonReplacedFormattingContext {
base_fragment_info: node_and_style_info.into(),
style: Arc::clone(&node_and_style_info.style),
content_sizes: None,
contents,
})
},
Err(contents) => Self::Replaced(ReplacedFormattingContext {
base_fragment_info: node_and_style_info.into(),
style: Arc::clone(&node_and_style_info.style),
contents,
}),
}
}
pub fn construct_for_text_runs<'dom>(
node_and_style_info: &NodeAndStyleInfo<impl NodeExt<'dom>>,
runs: impl Iterator<Item = crate::flow::inline::TextRun>,
propagated_text_decoration_line: TextDecorationLine,
) -> Self {
let bfc =
BlockFormattingContext::construct_for_text_runs(runs, propagated_text_decoration_line);
Self::NonReplaced(NonReplacedFormattingContext {
base_fragment_info: node_and_style_info.into(),
style: Arc::clone(&node_and_style_info.style),
content_sizes: None,
contents: NonReplacedFormattingContextContents::Flow(bfc),
})
}
pub fn style(&self) -> &Arc<ComputedValues> {
match self {
Self::NonReplaced(inner) => &inner.style,
Self::Replaced(inner) => &inner.style,
}
}
pub fn base_fragment_info(&self) -> BaseFragmentInfo {
match self {
Self::NonReplaced(inner) => inner.base_fragment_info,
Self::Replaced(inner) => inner.base_fragment_info,
}
}
pub fn inline_content_sizes(&self, layout_context: &LayoutContext) -> ContentSizes {
match self {
Self::NonReplaced(inner) => inner
.contents
.inline_content_sizes(layout_context, inner.style.writing_mode),
Self::Replaced(inner) => inner.contents.inline_content_sizes(&inner.style),
}
}
pub fn outer_inline_content_sizes(
&mut self,
layout_context: &LayoutContext,
containing_block_writing_mode: WritingMode,
) -> ContentSizes {
match self {
Self::NonReplaced(non_replaced) => {
let style = &non_replaced.style;
let content_sizes = &mut non_replaced.content_sizes;
let contents = &non_replaced.contents;
sizing::outer_inline(&style, containing_block_writing_mode, || {
content_sizes
.get_or_insert_with(|| {
contents.inline_content_sizes(layout_context, style.writing_mode)
})
.clone()
})
},
Self::Replaced(replaced) => {
sizing::outer_inline(&replaced.style, containing_block_writing_mode, || {
replaced.contents.inline_content_sizes(&replaced.style)
})
},
}
}
}
impl NonReplacedFormattingContext {
pub fn layout(
&self,
layout_context: &LayoutContext,
positioning_context: &mut PositioningContext,
containing_block: &ContainingBlock,
) -> IndependentLayout {
match &self.contents {
NonReplacedFormattingContextContents::Flow(bfc) => {
bfc.layout(layout_context, positioning_context, containing_block)
},
NonReplacedFormattingContextContents::Flex(fc) => {
fc.layout(layout_context, positioning_context, containing_block)
},
NonReplacedFormattingContextContents::Table(table) => {
table.layout(layout_context, positioning_context, containing_block)
},
}
}
pub fn inline_content_sizes(&mut self, layout_context: &LayoutContext) -> ContentSizes {
let writing_mode = self.style.writing_mode;
let contents = &self.contents;
self.content_sizes
.get_or_insert_with(|| contents.inline_content_sizes(layout_context, writing_mode))
.clone()
}
}
impl NonReplacedFormattingContextContents {
pub fn inline_content_sizes(
&self,
layout_context: &LayoutContext,
writing_mode: WritingMode,
) -> ContentSizes {
match self {
Self::Flow(inner) => inner
.contents
.inline_content_sizes(layout_context, writing_mode),
Self::Flex(inner) => inner.inline_content_sizes(),
Self::Table(table) => table.inline_content_sizes(),
}
}
}
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