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4e37d07ea4
Detect body elements during layout During layout it is often useful, for various specification reasons, to know if an element is the `<body>` element of an `<html>` element root. There are a couple places where a brittle heuristic is used to detect `<body>` elements. This information is going to be even more important to properly handle `<html>` elements that inherit their overflow property from their `<body>` children. Implementing this properly requires updating the DOM wrapper interface. This check does reach up to the parent of thread-safe nodes, but this is essentially the same kind of operation that `parent_style()` does, so is ostensibly safe. This change should not change any behavior and is just a preparation step for properly handle `<body>` overflow. <!-- Please describe your changes on the following line: --> --- <!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: --> - [x] `./mach build -d` does not report any errors - [x] `./mach test-tidy` does not report any errors - [x] These changes do not require tests because it does not change behavior. <!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.--> <!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->
813 lines
32 KiB
Rust
813 lines
32 KiB
Rust
/* 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::display_list::conversions::ToWebRender;
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use crate::display_list::stacking_context::StackingContextSection;
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use crate::fragment_tree::Tag;
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use crate::fragments::{BoxFragment, Fragment, TextFragment};
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use crate::geom::{PhysicalPoint, PhysicalRect};
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use crate::replaced::IntrinsicSizes;
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use crate::style_ext::ComputedValuesExt;
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use embedder_traits::Cursor;
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use euclid::{Point2D, SideOffsets2D, Size2D};
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use fnv::FnvHashMap;
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use gfx::text::glyph::GlyphStore;
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use mitochondria::OnceCell;
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use msg::constellation_msg::BrowsingContextId;
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use net_traits::image_cache::UsePlaceholder;
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use script_traits::compositor::CompositorDisplayListInfo;
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use std::sync::Arc;
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use style::computed_values::text_decoration_style::T as ComputedTextDecorationStyle;
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use style::dom::OpaqueNode;
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use style::properties::longhands::visibility::computed_value::T as Visibility;
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use style::properties::ComputedValues;
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use style::values::computed::{BorderStyle, Color, Length, LengthPercentage, OutlineStyle};
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use style::values::specified::text::TextDecorationLine;
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use style::values::specified::ui::CursorKind;
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use style_traits::CSSPixel;
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use webrender_api::{self as wr, units};
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mod background;
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mod conversions;
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mod gradient;
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pub mod stacking_context;
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#[derive(Clone, Copy)]
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pub struct WebRenderImageInfo {
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pub width: u32,
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pub height: u32,
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pub key: Option<wr::ImageKey>,
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}
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// `webrender_api::display_item::ItemTag` is private
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type ItemTag = (u64, u16);
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type HitInfo = Option<ItemTag>;
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pub struct DisplayListBuilder<'a> {
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/// The current SpatialId and ClipId information for this `DisplayListBuilder`.
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current_space_and_clip: wr::SpaceAndClipInfo,
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element_for_canvas_background: OpaqueNode,
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pub context: &'a LayoutContext<'a>,
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pub wr: wr::DisplayListBuilder,
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pub compositor_info: CompositorDisplayListInfo,
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pub iframe_sizes: FnvHashMap<BrowsingContextId, Size2D<f32, CSSPixel>>,
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/// Contentful paint, for the purpose of
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/// https://w3c.github.io/paint-timing/#first-contentful-paint
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/// (i.e. the display list contains items of type text,
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/// image, non-white canvas or SVG). Used by metrics.
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pub is_contentful: bool,
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}
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impl<'a> DisplayListBuilder<'a> {
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pub fn new(
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pipeline_id: wr::PipelineId,
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context: &'a LayoutContext,
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fragment_tree: &crate::FragmentTree,
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) -> Self {
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Self {
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current_space_and_clip: wr::SpaceAndClipInfo::root_scroll(pipeline_id),
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element_for_canvas_background: fragment_tree.canvas_background.from_element,
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is_contentful: false,
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context,
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wr: wr::DisplayListBuilder::new(pipeline_id, fragment_tree.scrollable_overflow()),
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compositor_info: CompositorDisplayListInfo::default(),
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iframe_sizes: FnvHashMap::default(),
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}
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}
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fn common_properties(
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&self,
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clip_rect: units::LayoutRect,
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style: &ComputedValues,
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) -> wr::CommonItemProperties {
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// TODO(mrobinson): We should take advantage of this field to pass hit testing
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// information. This will allow us to avoid creating hit testing display items
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// for fragments that paint their entire border rectangle.
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wr::CommonItemProperties {
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clip_rect,
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spatial_id: self.current_space_and_clip.spatial_id,
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clip_id: self.current_space_and_clip.clip_id,
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hit_info: None,
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flags: style.get_webrender_primitive_flags(),
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}
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}
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fn hit_info(
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&mut self,
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style: &ComputedValues,
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tag: Option<Tag>,
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auto_cursor: Cursor,
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) -> HitInfo {
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use style::computed_values::pointer_events::T as PointerEvents;
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let inherited_ui = style.get_inherited_ui();
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if inherited_ui.pointer_events == PointerEvents::None {
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return None;
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}
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let hit_test_index = self.compositor_info.add_hit_test_info(
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tag?.node.0 as u64,
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Some(cursor(inherited_ui.cursor.keyword, auto_cursor)),
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);
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Some((hit_test_index as u64, 0u16))
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}
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}
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impl Fragment {
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pub(crate) fn build_display_list(
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&self,
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builder: &mut DisplayListBuilder,
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containing_block: &PhysicalRect<Length>,
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section: StackingContextSection,
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) {
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match self {
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Fragment::Box(b) => match b.style.get_inherited_box().visibility {
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Visibility::Visible => {
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BuilderForBoxFragment::new(b, containing_block).build(builder, section)
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},
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Visibility::Hidden => (),
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Visibility::Collapse => (),
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},
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Fragment::AbsoluteOrFixedPositioned(_) => {},
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Fragment::Anonymous(_) => {},
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Fragment::Image(i) => match i.style.get_inherited_box().visibility {
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Visibility::Visible => {
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builder.is_contentful = true;
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let rect = i
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.rect
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.to_physical(i.style.writing_mode, containing_block)
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.translate(containing_block.origin.to_vector());
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let common = builder.common_properties(rect.to_webrender(), &i.style);
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builder.wr.push_image(
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&common,
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rect.to_webrender(),
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image_rendering(i.style.get_inherited_box().image_rendering),
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wr::AlphaType::PremultipliedAlpha,
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i.image_key,
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wr::ColorF::WHITE,
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);
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},
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Visibility::Hidden => (),
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Visibility::Collapse => (),
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},
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Fragment::IFrame(iframe) => match iframe.style.get_inherited_box().visibility {
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Visibility::Visible => {
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builder.is_contentful = true;
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let rect = iframe
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.rect
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.to_physical(iframe.style.writing_mode, containing_block)
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.translate(containing_block.origin.to_vector());
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builder.iframe_sizes.insert(
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iframe.browsing_context_id,
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Size2D::new(rect.size.width.px(), rect.size.height.px()),
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);
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let common = builder.common_properties(rect.to_webrender(), &iframe.style);
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builder.wr.push_iframe(
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rect.to_webrender(),
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common.clip_rect,
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&wr::SpaceAndClipInfo {
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spatial_id: common.spatial_id,
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clip_id: common.clip_id,
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},
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iframe.pipeline_id.to_webrender(),
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true,
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);
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},
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Visibility::Hidden => (),
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Visibility::Collapse => (),
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},
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Fragment::Text(t) => match t.parent_style.get_inherited_box().visibility {
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Visibility::Visible => {
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self.build_display_list_for_text_fragment(t, builder, containing_block)
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},
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Visibility::Hidden => (),
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Visibility::Collapse => (),
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},
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}
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}
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fn build_display_list_for_text_fragment(
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&self,
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fragment: &TextFragment,
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builder: &mut DisplayListBuilder,
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containing_block: &PhysicalRect<Length>,
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) {
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// NB: The order of painting text components (CSS Text Decoration Module Level 3) is:
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// shadows, underline, overline, text, text-emphasis, and then line-through.
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builder.is_contentful = true;
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let rect = fragment
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.rect
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.to_physical(fragment.parent_style.writing_mode, containing_block)
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.translate(containing_block.origin.to_vector());
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let mut baseline_origin = rect.origin.clone();
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baseline_origin.y += fragment.font_metrics.ascent;
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let glyphs = glyphs(&fragment.glyphs, baseline_origin);
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if glyphs.is_empty() {
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return;
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}
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let mut common = builder.common_properties(rect.to_webrender(), &fragment.parent_style);
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common.hit_info = builder.hit_info(&fragment.parent_style, fragment.base.tag, Cursor::Text);
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let color = fragment.parent_style.clone_color();
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let font_metrics = &fragment.font_metrics;
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let dppx = builder.context.style_context.device_pixel_ratio().get();
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let round_to_nearest_device_pixel = |value: Length| -> Length {
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// Round to the nearest integer device pixel, ensuring at least one device pixel.
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Length::new((value.px() * dppx).round().max(1.0) / dppx)
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};
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// Underline.
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if fragment
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.text_decoration_line
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.contains(TextDecorationLine::UNDERLINE)
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{
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let mut rect = rect;
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rect.origin.y = rect.origin.y + font_metrics.ascent - font_metrics.underline_offset;
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rect.size.height = round_to_nearest_device_pixel(font_metrics.underline_size);
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self.build_display_list_for_text_decoration(fragment, builder, &rect, color);
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}
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// Overline.
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if fragment
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.text_decoration_line
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.contains(TextDecorationLine::OVERLINE)
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{
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let mut rect = rect;
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rect.size.height = round_to_nearest_device_pixel(font_metrics.underline_size);
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self.build_display_list_for_text_decoration(fragment, builder, &rect, color);
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}
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// Text.
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builder.wr.push_text(
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&common,
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rect.to_webrender(),
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&glyphs,
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fragment.font_key,
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rgba(color),
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None,
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);
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// Line-through.
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if fragment
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.text_decoration_line
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.contains(TextDecorationLine::LINE_THROUGH)
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{
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let mut rect = rect;
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rect.origin.y = rect.origin.y + font_metrics.ascent - font_metrics.strikeout_offset;
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// XXX(ferjm) This does not work on MacOS #942
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rect.size.height = round_to_nearest_device_pixel(font_metrics.strikeout_size);
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self.build_display_list_for_text_decoration(fragment, builder, &rect, color);
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}
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}
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fn build_display_list_for_text_decoration(
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&self,
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fragment: &TextFragment,
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builder: &mut DisplayListBuilder,
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rect: &PhysicalRect<Length>,
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color: cssparser::RGBA,
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) {
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let rect = rect.to_webrender();
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let wavy_line_thickness = (0.33 * rect.size.height).ceil();
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let text_decoration_color = fragment
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.parent_style
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.clone_text_decoration_color()
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.to_rgba(color);
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let text_decoration_style = fragment.parent_style.clone_text_decoration_style();
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if text_decoration_style == ComputedTextDecorationStyle::MozNone {
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return;
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}
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builder.wr.push_line(
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&builder.common_properties(rect, &fragment.parent_style),
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&rect,
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wavy_line_thickness,
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wr::LineOrientation::Horizontal,
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&rgba(text_decoration_color),
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text_decoration_style.to_webrender(),
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);
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// XXX(ferjm) support text-decoration-style: double
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}
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}
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struct BuilderForBoxFragment<'a> {
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fragment: &'a BoxFragment,
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containing_block: &'a PhysicalRect<Length>,
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border_rect: units::LayoutRect,
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padding_rect: OnceCell<units::LayoutRect>,
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content_rect: OnceCell<units::LayoutRect>,
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border_radius: wr::BorderRadius,
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border_edge_clip_id: OnceCell<Option<wr::ClipId>>,
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padding_edge_clip_id: OnceCell<Option<wr::ClipId>>,
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content_edge_clip_id: OnceCell<Option<wr::ClipId>>,
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}
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impl<'a> BuilderForBoxFragment<'a> {
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fn new(fragment: &'a BoxFragment, containing_block: &'a PhysicalRect<Length>) -> Self {
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let border_rect: units::LayoutRect = fragment
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.border_rect()
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.to_physical(fragment.style.writing_mode, containing_block)
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.translate(containing_block.origin.to_vector())
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.to_webrender();
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let border_radius = {
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let resolve = |radius: &LengthPercentage, box_size: f32| {
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radius.percentage_relative_to(Length::new(box_size)).px()
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};
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let corner = |corner: &style::values::computed::BorderCornerRadius| {
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Size2D::new(
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resolve(&corner.0.width.0, border_rect.size.width),
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resolve(&corner.0.height.0, border_rect.size.height),
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)
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};
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let b = fragment.style.get_border();
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let mut radius = wr::BorderRadius {
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top_left: corner(&b.border_top_left_radius),
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top_right: corner(&b.border_top_right_radius),
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bottom_right: corner(&b.border_bottom_right_radius),
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bottom_left: corner(&b.border_bottom_left_radius),
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};
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// Normalize radii that add up to > 100%.
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// https://www.w3.org/TR/css-backgrounds-3/#corner-overlap
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// > Let f = min(L_i/S_i), where i ∈ {top, right, bottom, left},
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// > S_i is the sum of the two corresponding radii of the corners on side i,
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// > and L_top = L_bottom = the width of the box,
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// > and L_left = L_right = the height of the box.
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// > If f < 1, then all corner radii are reduced by multiplying them by f.
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let f = (border_rect.width() / (radius.top_left.width + radius.top_right.width))
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.min(border_rect.width() / (radius.bottom_left.width + radius.bottom_right.width))
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.min(border_rect.height() / (radius.top_left.height + radius.bottom_left.height))
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.min(border_rect.height() / (radius.top_right.height + radius.bottom_right.height));
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if f < 1.0 {
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radius.top_left *= f;
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radius.top_right *= f;
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radius.bottom_right *= f;
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radius.bottom_left *= f;
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}
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radius
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};
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Self {
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fragment,
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containing_block,
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border_rect,
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border_radius,
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padding_rect: OnceCell::new(),
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content_rect: OnceCell::new(),
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border_edge_clip_id: OnceCell::new(),
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padding_edge_clip_id: OnceCell::new(),
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content_edge_clip_id: OnceCell::new(),
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}
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}
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fn content_rect(&self) -> &units::LayoutRect {
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self.content_rect.init_once(|| {
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self.fragment
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.content_rect
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.to_physical(self.fragment.style.writing_mode, self.containing_block)
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.translate(self.containing_block.origin.to_vector())
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.to_webrender()
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})
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}
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fn padding_rect(&self) -> &units::LayoutRect {
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self.padding_rect.init_once(|| {
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self.fragment
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.padding_rect()
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.to_physical(self.fragment.style.writing_mode, self.containing_block)
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.translate(self.containing_block.origin.to_vector())
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.to_webrender()
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})
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}
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fn border_edge_clip(&self, builder: &mut DisplayListBuilder) -> Option<wr::ClipId> {
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*self
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.border_edge_clip_id
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.init_once(|| clip_for_radii(self.border_radius, self.border_rect, builder))
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}
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fn padding_edge_clip(&self, builder: &mut DisplayListBuilder) -> Option<wr::ClipId> {
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*self.padding_edge_clip_id.init_once(|| {
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clip_for_radii(
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inner_radii(
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self.border_radius,
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self.fragment
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.border
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.to_physical(self.fragment.style.writing_mode)
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.to_webrender(),
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),
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*self.padding_rect(),
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builder,
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)
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})
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}
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fn content_edge_clip(&self, builder: &mut DisplayListBuilder) -> Option<wr::ClipId> {
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*self.content_edge_clip_id.init_once(|| {
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clip_for_radii(
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inner_radii(
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self.border_radius,
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(&self.fragment.border + &self.fragment.padding)
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.to_physical(self.fragment.style.writing_mode)
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.to_webrender(),
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),
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*self.content_rect(),
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builder,
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)
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})
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}
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fn build(&mut self, builder: &mut DisplayListBuilder, section: StackingContextSection) {
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if section == StackingContextSection::Outline {
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self.build_outline(builder);
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} else {
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self.build_hit_test(builder);
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self.build_background(builder);
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self.build_border(builder);
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}
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}
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fn build_hit_test(&self, builder: &mut DisplayListBuilder) {
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let hit_info = builder.hit_info(
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&self.fragment.style,
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self.fragment.base.tag,
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Cursor::Default,
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);
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if hit_info.is_some() {
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let mut common = builder.common_properties(self.border_rect, &self.fragment.style);
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common.hit_info = hit_info;
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if let Some(clip_id) = self.border_edge_clip(builder) {
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common.clip_id = clip_id
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}
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builder.wr.push_hit_test(&common)
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}
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}
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fn build_background(&mut self, builder: &mut DisplayListBuilder) {
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if self
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.fragment
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.base
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.is_for_node(builder.element_for_canvas_background)
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{
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// This background is already painted for the canvas, don’t paint it again here.
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return;
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}
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let source = background::Source::Fragment;
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let style = &self.fragment.style;
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||
let b = style.get_background();
|
||
let background_color = style.resolve_color(b.background_color);
|
||
if background_color.alpha > 0 {
|
||
// https://drafts.csswg.org/css-backgrounds/#background-color
|
||
// “The background color is clipped according to the background-clip
|
||
// value associated with the bottom-most background image layer.”
|
||
let layer_index = b.background_image.0.len() - 1;
|
||
let (bounds, common) = background::painting_area(self, &source, builder, layer_index);
|
||
builder
|
||
.wr
|
||
.push_rect(&common, *bounds, rgba(background_color))
|
||
}
|
||
|
||
self.build_background_image(builder, source);
|
||
}
|
||
|
||
fn build_background_image(
|
||
&mut self,
|
||
builder: &mut DisplayListBuilder,
|
||
source: background::Source<'a>,
|
||
) {
|
||
use style::values::computed::image::Image;
|
||
let style = match source {
|
||
background::Source::Canvas { style, .. } => style,
|
||
background::Source::Fragment => &self.fragment.style,
|
||
};
|
||
let b = style.get_background();
|
||
// Reverse because the property is top layer first, we want to paint bottom layer first.
|
||
for (index, image) in b.background_image.0.iter().enumerate().rev() {
|
||
match image {
|
||
Image::None => {},
|
||
Image::Gradient(ref gradient) => {
|
||
let intrinsic = IntrinsicSizes {
|
||
width: None,
|
||
height: None,
|
||
ratio: None,
|
||
};
|
||
if let Some(layer) =
|
||
&background::layout_layer(self, &source, builder, index, intrinsic)
|
||
{
|
||
gradient::build(&style, &gradient, layer, builder)
|
||
}
|
||
},
|
||
Image::Url(ref image_url) => {
|
||
// FIXME: images won’t always have in intrinsic width or
|
||
// height when support for SVG is added, or a WebRender
|
||
// `ImageKey`, for that matter.
|
||
//
|
||
// FIXME: It feels like this should take into account the pseudo
|
||
// element and not just the node.
|
||
let node = match self.fragment.base.tag {
|
||
Some(tag) => tag.node,
|
||
None => continue,
|
||
};
|
||
let image_url = match image_url.url() {
|
||
Some(url) => url.clone(),
|
||
None => continue,
|
||
};
|
||
let (width, height, key) = match builder.context.get_webrender_image_for_url(
|
||
node,
|
||
image_url,
|
||
UsePlaceholder::No,
|
||
) {
|
||
Some(WebRenderImageInfo {
|
||
width,
|
||
height,
|
||
key: Some(key),
|
||
}) => (width, height, key),
|
||
_ => continue,
|
||
};
|
||
|
||
// FIXME: https://drafts.csswg.org/css-images-4/#the-image-resolution
|
||
let dppx = 1.0;
|
||
|
||
let intrinsic = IntrinsicSizes {
|
||
width: Some(Length::new(width as f32 / dppx)),
|
||
height: Some(Length::new(height as f32 / dppx)),
|
||
// FIXME https://github.com/w3c/csswg-drafts/issues/4572
|
||
ratio: Some(width as f32 / height as f32),
|
||
};
|
||
|
||
if let Some(layer) =
|
||
background::layout_layer(self, &source, builder, index, intrinsic)
|
||
{
|
||
let image_rendering = image_rendering(style.clone_image_rendering());
|
||
if layer.repeat {
|
||
builder.wr.push_repeating_image(
|
||
&layer.common,
|
||
layer.bounds,
|
||
layer.tile_size,
|
||
layer.tile_spacing,
|
||
image_rendering,
|
||
wr::AlphaType::PremultipliedAlpha,
|
||
key,
|
||
wr::ColorF::WHITE,
|
||
)
|
||
} else {
|
||
builder.wr.push_image(
|
||
&layer.common,
|
||
layer.bounds,
|
||
image_rendering,
|
||
wr::AlphaType::PremultipliedAlpha,
|
||
key,
|
||
wr::ColorF::WHITE,
|
||
)
|
||
}
|
||
}
|
||
},
|
||
// Gecko-only value, represented as a (boxed) empty enum on non-Gecko.
|
||
Image::Rect(ref rect) => match **rect {},
|
||
Image::ImageSet(..) | Image::CrossFade(..) => {
|
||
unreachable!("Shouldn't be parsed on Servo for now")
|
||
},
|
||
}
|
||
}
|
||
}
|
||
|
||
fn build_border_side(&mut self, style: BorderStyle, color: Color) -> wr::BorderSide {
|
||
wr::BorderSide {
|
||
color: rgba(self.fragment.style.resolve_color(color)),
|
||
style: match style {
|
||
BorderStyle::None => wr::BorderStyle::None,
|
||
BorderStyle::Solid => wr::BorderStyle::Solid,
|
||
BorderStyle::Double => wr::BorderStyle::Double,
|
||
BorderStyle::Dotted => wr::BorderStyle::Dotted,
|
||
BorderStyle::Dashed => wr::BorderStyle::Dashed,
|
||
BorderStyle::Hidden => wr::BorderStyle::Hidden,
|
||
BorderStyle::Groove => wr::BorderStyle::Groove,
|
||
BorderStyle::Ridge => wr::BorderStyle::Ridge,
|
||
BorderStyle::Inset => wr::BorderStyle::Inset,
|
||
BorderStyle::Outset => wr::BorderStyle::Outset,
|
||
},
|
||
}
|
||
}
|
||
|
||
fn build_border(&mut self, builder: &mut DisplayListBuilder) {
|
||
let border = self.fragment.style.get_border();
|
||
let widths = SideOffsets2D::new(
|
||
border.border_top_width.px(),
|
||
border.border_right_width.px(),
|
||
border.border_bottom_width.px(),
|
||
border.border_left_width.px(),
|
||
);
|
||
if widths == SideOffsets2D::zero() {
|
||
return;
|
||
}
|
||
let common = builder.common_properties(self.border_rect, &self.fragment.style);
|
||
let details = wr::BorderDetails::Normal(wr::NormalBorder {
|
||
top: self.build_border_side(border.border_top_style, border.border_top_color),
|
||
right: self.build_border_side(border.border_right_style, border.border_right_color),
|
||
bottom: self.build_border_side(border.border_bottom_style, border.border_bottom_color),
|
||
left: self.build_border_side(border.border_left_style, border.border_left_color),
|
||
radius: self.border_radius,
|
||
do_aa: true,
|
||
});
|
||
builder
|
||
.wr
|
||
.push_border(&common, self.border_rect, widths, details)
|
||
}
|
||
|
||
fn build_outline(&mut self, builder: &mut DisplayListBuilder) {
|
||
let outline = self.fragment.style.get_outline();
|
||
let width = outline.outline_width.px();
|
||
if width == 0.0 {
|
||
return;
|
||
}
|
||
let offset = outline
|
||
.outline_offset
|
||
.px()
|
||
.max(-self.border_rect.width() / 2.0)
|
||
.max(-self.border_rect.height() / 2.0) +
|
||
width;
|
||
let outline_rect = self.border_rect.inflate(offset, offset);
|
||
let common = builder.common_properties(outline_rect, &self.fragment.style);
|
||
let widths = SideOffsets2D::new_all_same(width);
|
||
let style = match outline.outline_style {
|
||
// TODO: treating 'auto' as 'solid' is allowed by the spec,
|
||
// but we should do something better.
|
||
OutlineStyle::Auto => BorderStyle::Solid,
|
||
OutlineStyle::BorderStyle(s) => s,
|
||
};
|
||
let side = self.build_border_side(style, outline.outline_color);
|
||
let details = wr::BorderDetails::Normal(wr::NormalBorder {
|
||
top: side,
|
||
right: side,
|
||
bottom: side,
|
||
left: side,
|
||
radius: offset_radii(self.border_radius, offset),
|
||
do_aa: true,
|
||
});
|
||
builder
|
||
.wr
|
||
.push_border(&common, outline_rect, widths, details)
|
||
}
|
||
}
|
||
|
||
fn rgba(rgba: cssparser::RGBA) -> wr::ColorF {
|
||
wr::ColorF::new(
|
||
rgba.red_f32(),
|
||
rgba.green_f32(),
|
||
rgba.blue_f32(),
|
||
rgba.alpha_f32(),
|
||
)
|
||
}
|
||
|
||
fn glyphs(
|
||
glyph_runs: &[Arc<GlyphStore>],
|
||
mut origin: PhysicalPoint<Length>,
|
||
) -> Vec<wr::GlyphInstance> {
|
||
use gfx_traits::ByteIndex;
|
||
use range::Range;
|
||
|
||
let mut glyphs = vec![];
|
||
for run in glyph_runs {
|
||
for glyph in run.iter_glyphs_for_byte_range(&Range::new(ByteIndex(0), run.len())) {
|
||
if !run.is_whitespace() {
|
||
let glyph_offset = glyph.offset().unwrap_or(Point2D::zero());
|
||
let point = units::LayoutPoint::new(
|
||
origin.x.px() + glyph_offset.x.to_f32_px(),
|
||
origin.y.px() + glyph_offset.y.to_f32_px(),
|
||
);
|
||
let glyph = wr::GlyphInstance {
|
||
index: glyph.id(),
|
||
point,
|
||
};
|
||
glyphs.push(glyph);
|
||
}
|
||
origin.x += Length::from(glyph.advance());
|
||
}
|
||
}
|
||
glyphs
|
||
}
|
||
|
||
fn cursor(kind: CursorKind, auto_cursor: Cursor) -> Cursor {
|
||
match kind {
|
||
CursorKind::Auto => auto_cursor,
|
||
CursorKind::None => Cursor::None,
|
||
CursorKind::Default => Cursor::Default,
|
||
CursorKind::Pointer => Cursor::Pointer,
|
||
CursorKind::ContextMenu => Cursor::ContextMenu,
|
||
CursorKind::Help => Cursor::Help,
|
||
CursorKind::Progress => Cursor::Progress,
|
||
CursorKind::Wait => Cursor::Wait,
|
||
CursorKind::Cell => Cursor::Cell,
|
||
CursorKind::Crosshair => Cursor::Crosshair,
|
||
CursorKind::Text => Cursor::Text,
|
||
CursorKind::VerticalText => Cursor::VerticalText,
|
||
CursorKind::Alias => Cursor::Alias,
|
||
CursorKind::Copy => Cursor::Copy,
|
||
CursorKind::Move => Cursor::Move,
|
||
CursorKind::NoDrop => Cursor::NoDrop,
|
||
CursorKind::NotAllowed => Cursor::NotAllowed,
|
||
CursorKind::Grab => Cursor::Grab,
|
||
CursorKind::Grabbing => Cursor::Grabbing,
|
||
CursorKind::EResize => Cursor::EResize,
|
||
CursorKind::NResize => Cursor::NResize,
|
||
CursorKind::NeResize => Cursor::NeResize,
|
||
CursorKind::NwResize => Cursor::NwResize,
|
||
CursorKind::SResize => Cursor::SResize,
|
||
CursorKind::SeResize => Cursor::SeResize,
|
||
CursorKind::SwResize => Cursor::SwResize,
|
||
CursorKind::WResize => Cursor::WResize,
|
||
CursorKind::EwResize => Cursor::EwResize,
|
||
CursorKind::NsResize => Cursor::NsResize,
|
||
CursorKind::NeswResize => Cursor::NeswResize,
|
||
CursorKind::NwseResize => Cursor::NwseResize,
|
||
CursorKind::ColResize => Cursor::ColResize,
|
||
CursorKind::RowResize => Cursor::RowResize,
|
||
CursorKind::AllScroll => Cursor::AllScroll,
|
||
CursorKind::ZoomIn => Cursor::ZoomIn,
|
||
CursorKind::ZoomOut => Cursor::ZoomOut,
|
||
}
|
||
}
|
||
|
||
fn image_rendering(ir: style::computed_values::image_rendering::T) -> wr::ImageRendering {
|
||
use style::computed_values::image_rendering::T as ImageRendering;
|
||
match ir {
|
||
ImageRendering::Auto => wr::ImageRendering::Auto,
|
||
ImageRendering::CrispEdges => wr::ImageRendering::CrispEdges,
|
||
ImageRendering::Pixelated => wr::ImageRendering::Pixelated,
|
||
}
|
||
}
|
||
|
||
/// Radii for the padding edge or content edge
|
||
fn inner_radii(mut radii: wr::BorderRadius, insets: units::LayoutSideOffsets) -> wr::BorderRadius {
|
||
assert!(insets.left >= 0.0, "left inset must not be negative");
|
||
radii.top_left.width -= insets.left;
|
||
radii.bottom_left.width -= insets.left;
|
||
|
||
assert!(insets.right >= 0.0, "left inset must not be negative");
|
||
radii.top_right.width -= insets.right;
|
||
radii.bottom_right.width -= insets.right;
|
||
|
||
assert!(insets.top >= 0.0, "top inset must not be negative");
|
||
radii.top_left.height -= insets.top;
|
||
radii.top_right.height -= insets.top;
|
||
|
||
assert!(insets.bottom >= 0.0, "bottom inset must not be negative");
|
||
radii.bottom_left.height -= insets.bottom;
|
||
radii.bottom_right.height -= insets.bottom;
|
||
radii
|
||
}
|
||
|
||
fn offset_radii(mut radii: wr::BorderRadius, offset: f32) -> wr::BorderRadius {
|
||
if offset == 0.0 {
|
||
return radii;
|
||
}
|
||
if offset < 0.0 {
|
||
return inner_radii(radii, units::LayoutSideOffsets::new_all_same(-offset));
|
||
}
|
||
let expand = |radius: &mut f32| {
|
||
// Expand the radius by the specified amount, but keeping sharp corners.
|
||
// TODO: this behavior is not continuous, it's being discussed in the CSSWG:
|
||
// https://github.com/w3c/csswg-drafts/issues/7103
|
||
if *radius > 0.0 {
|
||
*radius += offset;
|
||
}
|
||
};
|
||
expand(&mut radii.top_left.width);
|
||
expand(&mut radii.top_left.height);
|
||
expand(&mut radii.top_right.width);
|
||
expand(&mut radii.top_right.height);
|
||
expand(&mut radii.bottom_right.width);
|
||
expand(&mut radii.bottom_right.height);
|
||
expand(&mut radii.bottom_left.width);
|
||
expand(&mut radii.bottom_left.height);
|
||
radii
|
||
}
|
||
|
||
fn clip_for_radii(
|
||
radii: wr::BorderRadius,
|
||
rect: units::LayoutRect,
|
||
builder: &mut DisplayListBuilder,
|
||
) -> Option<wr::ClipId> {
|
||
if radii.is_zero() {
|
||
None
|
||
} else {
|
||
Some(builder.wr.define_clip_rounded_rect(
|
||
&builder.current_space_and_clip,
|
||
wr::ComplexClipRegion {
|
||
rect,
|
||
radii,
|
||
mode: wr::ClipMode::Clip,
|
||
},
|
||
))
|
||
}
|
||
}
|