forked from mirrors/gecko-dev
6ccbad8048
webrender add gradient border support in https://github.com/servo/webrender/pull/953. This pr add support in servo. --- <!-- 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 <!-- Either: --> - [X] These changes do not require tests because it should be covered by wpt <!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. --> Source-Repo: https://github.com/servo/servo Source-Revision: fd8127b23b177886217eb1f21963e6c02528647a --HG-- extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear extra : subtree_revision : 9f3188db40cd1d21acb98f2b7f6927961c8e71ad
2320 lines
115 KiB
Rust
2320 lines
115 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 http://mozilla.org/MPL/2.0/. */
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//! Builds display lists from flows and fragments.
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//!
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//! Other browser engines sometimes call this "painting", but it is more accurately called display
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//! list building, as the actual painting does not happen here—only deciding *what* we're going to
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//! paint.
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#![deny(unsafe_code)]
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use app_units::{AU_PER_PX, Au};
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use block::{BlockFlow, BlockStackingContextType};
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use canvas_traits::{CanvasData, CanvasMsg, FromLayoutMsg};
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use context::LayoutContext;
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use euclid::{Point2D, Rect, SideOffsets2D, Size2D, TypedSize2D};
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use flex::FlexFlow;
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use flow::{BaseFlow, Flow, IS_ABSOLUTELY_POSITIONED};
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use flow_ref::FlowRef;
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use fragment::{CoordinateSystem, Fragment, ImageFragmentInfo, ScannedTextFragmentInfo};
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use fragment::{SpecificFragmentInfo, TruncatedFragmentInfo};
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use gfx::display_list;
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use gfx::display_list::{BLUR_INFLATION_FACTOR, BaseDisplayItem, BorderDetails};
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use gfx::display_list::{BorderDisplayItem, ImageBorder, NormalBorder};
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use gfx::display_list::{BorderRadii, BoxShadowClipMode, BoxShadowDisplayItem, ClippingRegion};
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use gfx::display_list::{DisplayItem, DisplayItemMetadata, DisplayList, DisplayListSection};
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use gfx::display_list::{GradientDisplayItem, IframeDisplayItem, ImageDisplayItem};
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use gfx::display_list::{LineDisplayItem, OpaqueNode};
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use gfx::display_list::{SolidColorDisplayItem, ScrollRoot, StackingContext, StackingContextType};
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use gfx::display_list::{TextDisplayItem, TextOrientation, WebGLDisplayItem, WebRenderImageInfo};
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use gfx_traits::{ScrollRootId, StackingContextId};
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use inline::{FIRST_FRAGMENT_OF_ELEMENT, InlineFlow, LAST_FRAGMENT_OF_ELEMENT};
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use ipc_channel::ipc;
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use list_item::ListItemFlow;
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use model::{self, MaybeAuto};
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use msg::constellation_msg::PipelineId;
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use net_traits::image::base::PixelFormat;
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use net_traits::image_cache_thread::UsePlaceholder;
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use range::Range;
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use servo_config::opts;
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use servo_url::ServoUrl;
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use std::{cmp, f32};
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use std::collections::HashMap;
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use std::default::Default;
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use std::mem;
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use std::sync::Arc;
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use style::computed_values::{background_attachment, background_clip, background_origin};
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use style::computed_values::{background_repeat, background_size, border_style};
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use style::computed_values::{cursor, image_rendering, overflow_x};
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use style::computed_values::{pointer_events, position, transform_style, visibility};
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use style::computed_values::_servo_overflow_clip_box as overflow_clip_box;
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use style::computed_values::filter::Filter;
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use style::computed_values::text_shadow::TextShadow;
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use style::logical_geometry::{LogicalPoint, LogicalRect, LogicalSize, WritingMode};
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use style::properties::{self, ServoComputedValues};
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use style::properties::longhands::border_image_repeat::computed_value::RepeatKeyword;
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use style::properties::style_structs;
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use style::servo::restyle_damage::REPAINT;
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use style::values::{RGBA, computed};
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use style::values::computed::{AngleOrCorner, Gradient, GradientKind, LengthOrPercentage, LengthOrPercentageOrAuto};
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use style::values::computed::NumberOrPercentage;
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use style::values::specified::{HorizontalDirection, VerticalDirection};
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use style_traits::CSSPixel;
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use style_traits::cursor::Cursor;
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use table_cell::CollapsedBordersForCell;
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use webrender_traits::{ColorF, GradientStop, RepeatMode, ScrollPolicy};
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trait ResolvePercentage {
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fn resolve(&self, length: u32) -> u32;
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}
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impl ResolvePercentage for NumberOrPercentage {
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fn resolve(&self, length: u32) -> u32 {
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match *self {
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NumberOrPercentage::Percentage(p) => {
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(p.0 * length as f32).round() as u32
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}
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NumberOrPercentage::Number(n) => {
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n.round() as u32
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}
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}
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}
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}
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fn convert_repeat_mode(from: RepeatKeyword) -> RepeatMode {
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match from {
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RepeatKeyword::Stretch => RepeatMode::Stretch,
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RepeatKeyword::Repeat => RepeatMode::Repeat,
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RepeatKeyword::Round => RepeatMode::Round,
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RepeatKeyword::Space => RepeatMode::Space,
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}
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}
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trait RgbColor {
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fn rgb(r: u8, g: u8, b: u8) -> Self;
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}
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impl RgbColor for ColorF {
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fn rgb(r: u8, g: u8, b: u8) -> Self {
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ColorF {
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r: (r as f32) / (255.0 as f32),
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g: (g as f32) / (255.0 as f32),
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b: (b as f32) / (255.0 as f32),
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a: 1.0 as f32
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}
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}
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}
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static THREAD_TINT_COLORS: [ColorF; 8] = [
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ColorF { r: 6.0 / 255.0, g: 153.0 / 255.0, b: 198.0 / 255.0, a: 0.7 },
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ColorF { r: 255.0 / 255.0, g: 212.0 / 255.0, b: 83.0 / 255.0, a: 0.7 },
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ColorF { r: 116.0 / 255.0, g: 29.0 / 255.0, b: 109.0 / 255.0, a: 0.7 },
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ColorF { r: 204.0 / 255.0, g: 158.0 / 255.0, b: 199.0 / 255.0, a: 0.7 },
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ColorF { r: 242.0 / 255.0, g: 46.0 / 255.0, b: 121.0 / 255.0, a: 0.7 },
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ColorF { r: 116.0 / 255.0, g: 203.0 / 255.0, b: 196.0 / 255.0, a: 0.7 },
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ColorF { r: 255.0 / 255.0, g: 249.0 / 255.0, b: 201.0 / 255.0, a: 0.7 },
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ColorF { r: 137.0 / 255.0, g: 196.0 / 255.0, b: 78.0 / 255.0, a: 0.7 },
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];
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fn get_cyclic<T>(arr: &[T], index: usize) -> &T {
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&arr[index % arr.len()]
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}
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#[derive(Debug)]
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struct StackingContextInfo {
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children: Vec<StackingContext>,
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scroll_roots: Vec<ScrollRoot>,
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}
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impl StackingContextInfo {
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fn new() -> StackingContextInfo {
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StackingContextInfo {
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children: Vec::new(),
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scroll_roots: Vec::new(),
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}
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}
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fn take_children(&mut self) -> Vec<StackingContext> {
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mem::replace(&mut self.children, Vec::new())
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}
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}
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pub struct DisplayListBuildState<'a> {
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pub layout_context: &'a LayoutContext<'a>,
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pub root_stacking_context: StackingContext,
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pub items: HashMap<StackingContextId, Vec<DisplayItem>>,
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stacking_context_info: HashMap<StackingContextId, StackingContextInfo>,
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pub scroll_root_parents: HashMap<ScrollRootId, ScrollRootId>,
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pub processing_scroll_root_element: bool,
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/// The current stacking context id, used to keep track of state when building.
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/// recursively building and processing the display list.
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pub current_stacking_context_id: StackingContextId,
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/// The current scroll root id, used to keep track of state when
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/// recursively building and processing the display list.
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pub current_scroll_root_id: ScrollRootId,
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/// Vector containing iframe sizes, used to inform the constellation about
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/// new iframe sizes
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pub iframe_sizes: Vec<(PipelineId, TypedSize2D<f32, CSSPixel>)>,
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}
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impl<'a> DisplayListBuildState<'a> {
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pub fn new(layout_context: &'a LayoutContext) -> DisplayListBuildState<'a> {
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DisplayListBuildState {
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layout_context: layout_context,
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root_stacking_context: StackingContext::root(),
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items: HashMap::new(),
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stacking_context_info: HashMap::new(),
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scroll_root_parents: HashMap::new(),
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processing_scroll_root_element: false,
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current_stacking_context_id: StackingContextId::root(),
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current_scroll_root_id: ScrollRootId::root(),
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iframe_sizes: Vec::new(),
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}
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}
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fn add_display_item(&mut self, display_item: DisplayItem) {
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let items = self.items.entry(display_item.stacking_context_id()).or_insert(Vec::new());
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items.push(display_item);
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}
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fn add_stacking_context(&mut self,
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parent_id: StackingContextId,
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stacking_context: StackingContext) {
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let info = self.stacking_context_info
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.entry(parent_id)
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.or_insert(StackingContextInfo::new());
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info.children.push(stacking_context);
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}
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fn add_scroll_root(&mut self, scroll_root: ScrollRoot, stacking_context_id: StackingContextId) {
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self.scroll_root_parents.insert(scroll_root.id, scroll_root.parent_id);
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let info = self.stacking_context_info
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.entry(stacking_context_id)
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.or_insert(StackingContextInfo::new());
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info.scroll_roots.push(scroll_root);
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}
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fn parent_scroll_root_id(&self, scroll_root_id: ScrollRootId) -> ScrollRootId {
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if scroll_root_id == ScrollRootId::root() {
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return ScrollRootId::root()
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}
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debug_assert!(self.scroll_root_parents.contains_key(&scroll_root_id));
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*self.scroll_root_parents.get(&scroll_root_id).unwrap()
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}
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fn create_base_display_item(&self,
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bounds: &Rect<Au>,
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clip: &ClippingRegion,
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node: OpaqueNode,
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cursor: Option<Cursor>,
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section: DisplayListSection)
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-> BaseDisplayItem {
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let scroll_root_id = if (section == DisplayListSection::BackgroundAndBorders ||
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section == DisplayListSection::BlockBackgroundsAndBorders) &&
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self.processing_scroll_root_element {
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self.parent_scroll_root_id(self.current_scroll_root_id)
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} else {
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self.current_scroll_root_id
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};
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BaseDisplayItem::new(&bounds,
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DisplayItemMetadata {
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node: node,
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pointing: cursor,
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},
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&clip,
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section,
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self.current_stacking_context_id,
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scroll_root_id)
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}
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pub fn to_display_list(mut self) -> DisplayList {
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let mut list = Vec::new();
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let root_context = mem::replace(&mut self.root_stacking_context, StackingContext::root());
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self.to_display_list_for_stacking_context(&mut list, root_context);
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DisplayList {
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list: list,
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}
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}
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fn to_display_list_for_stacking_context(&mut self,
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list: &mut Vec<DisplayItem>,
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stacking_context: StackingContext) {
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let mut child_items = self.items.remove(&stacking_context.id).unwrap_or(Vec::new());
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child_items.sort_by(|a, b| a.base().section.cmp(&b.base().section));
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child_items.reverse();
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let mut info = self.stacking_context_info.remove(&stacking_context.id)
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.unwrap_or_else(StackingContextInfo::new);
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info.children.sort();
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if stacking_context.context_type != StackingContextType::Real {
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list.extend(info.scroll_roots.into_iter().map(|root| root.to_push()));
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self.to_display_list_for_items(list, child_items, info.children);
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} else {
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let (push_item, pop_item) = stacking_context.to_display_list_items();
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list.push(push_item);
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list.extend(info.scroll_roots.into_iter().map(|root| root.to_push()));
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self.to_display_list_for_items(list, child_items, info.children);
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list.push(pop_item);
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}
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}
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fn to_display_list_for_items(&mut self,
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list: &mut Vec<DisplayItem>,
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mut child_items: Vec<DisplayItem>,
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child_stacking_contexts: Vec<StackingContext>) {
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// Properly order display items that make up a stacking context. "Steps" here
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// refer to the steps in CSS 2.1 Appendix E.
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// Steps 1 and 2: Borders and background for the root.
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while child_items.last().map_or(false,
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|child| child.section() == DisplayListSection::BackgroundAndBorders) {
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list.push(child_items.pop().unwrap());
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}
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// Step 3: Positioned descendants with negative z-indices.
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let mut child_stacking_contexts = child_stacking_contexts.into_iter().peekable();
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while child_stacking_contexts.peek().map_or(false, |child| child.z_index < 0) {
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let context = child_stacking_contexts.next().unwrap();
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self.to_display_list_for_stacking_context(list, context);
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}
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// Step 4: Block backgrounds and borders.
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while child_items.last().map_or(false,
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|child| child.section() == DisplayListSection::BlockBackgroundsAndBorders) {
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list.push(child_items.pop().unwrap());
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}
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// Step 5: Floats.
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while child_stacking_contexts.peek().map_or(false,
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|child| child.context_type == StackingContextType::PseudoFloat) {
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let context = child_stacking_contexts.next().unwrap();
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self.to_display_list_for_stacking_context(list, context);
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}
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// Step 6 & 7: Content and inlines that generate stacking contexts.
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while child_items.last().map_or(false,
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|child| child.section() == DisplayListSection::Content) {
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list.push(child_items.pop().unwrap());
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}
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// Step 8 & 9: Positioned descendants with nonnegative, numeric z-indices.
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for child in child_stacking_contexts {
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self.to_display_list_for_stacking_context(list, child);
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}
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// Step 10: Outlines.
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for item in child_items.drain(..) {
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list.push(item);
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}
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}
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}
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/// The logical width of an insertion point: at the moment, a one-pixel-wide line.
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const INSERTION_POINT_LOGICAL_WIDTH: Au = Au(1 * AU_PER_PX);
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pub trait FragmentDisplayListBuilding {
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/// Adds the display items necessary to paint the background of this fragment to the display
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/// list if necessary.
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fn build_display_list_for_background_if_applicable(&self,
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state: &mut DisplayListBuildState,
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style: &ServoComputedValues,
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display_list_section: DisplayListSection,
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absolute_bounds: &Rect<Au>,
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clip: &ClippingRegion);
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/// Computes the background size for an image with the given background area according to the
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/// rules in CSS-BACKGROUNDS § 3.9.
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fn compute_background_image_size(&self,
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style: &ServoComputedValues,
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bounds: &Rect<Au>,
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image: &WebRenderImageInfo, index: usize)
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-> Size2D<Au>;
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/// Adds the display items necessary to paint the background image of this fragment to the
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/// appropriate section of the display list.
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fn build_display_list_for_background_image(&self,
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state: &mut DisplayListBuildState,
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style: &ServoComputedValues,
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display_list_section: DisplayListSection,
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absolute_bounds: &Rect<Au>,
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clip: &ClippingRegion,
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image_url: &ServoUrl,
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background_index: usize);
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fn convert_gradient(&self,
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absolute_bounds: &Rect<Au>,
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gradient: &Gradient,
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style: &ServoComputedValues)
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-> Option<display_list::Gradient>;
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/// Adds the display items necessary to paint the background linear gradient of this fragment
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/// to the appropriate section of the display list.
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fn build_display_list_for_background_gradient(&self,
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state: &mut DisplayListBuildState,
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display_list_section: DisplayListSection,
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absolute_bounds: &Rect<Au>,
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clip: &ClippingRegion,
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gradient: &Gradient,
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style: &ServoComputedValues);
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/// Adds the display items necessary to paint the borders of this fragment to a display list if
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/// necessary.
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fn build_display_list_for_borders_if_applicable(
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&self,
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state: &mut DisplayListBuildState,
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style: &ServoComputedValues,
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border_painting_mode: BorderPaintingMode,
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bounds: &Rect<Au>,
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display_list_section: DisplayListSection,
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clip: &ClippingRegion);
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/// Adds the display items necessary to paint the outline of this fragment to the display list
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/// if necessary.
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fn build_display_list_for_outline_if_applicable(&self,
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state: &mut DisplayListBuildState,
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style: &ServoComputedValues,
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bounds: &Rect<Au>,
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clip: &ClippingRegion);
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/// Adds the display items necessary to paint the box shadow of this fragment to the display
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/// list if necessary.
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fn build_display_list_for_box_shadow_if_applicable(&self,
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state: &mut DisplayListBuildState,
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style: &ServoComputedValues,
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display_list_section: DisplayListSection,
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absolute_bounds: &Rect<Au>,
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clip: &ClippingRegion);
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/// Adds display items necessary to draw debug boxes around a scanned text fragment.
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fn build_debug_borders_around_text_fragments(&self,
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state: &mut DisplayListBuildState,
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style: &ServoComputedValues,
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stacking_relative_border_box: &Rect<Au>,
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||
stacking_relative_content_box: &Rect<Au>,
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text_fragment: &ScannedTextFragmentInfo,
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clip: &ClippingRegion);
|
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/// Adds display items necessary to draw debug boxes around this fragment.
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fn build_debug_borders_around_fragment(&self,
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state: &mut DisplayListBuildState,
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stacking_relative_border_box: &Rect<Au>,
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clip: &ClippingRegion);
|
||
|
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/// Adds the display items for this fragment to the given display list.
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///
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/// Arguments:
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///
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||
/// * `state`: The display building state, including the display list currently
|
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/// under construction and other metadata useful for constructing it.
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/// * `dirty`: The dirty rectangle in the coordinate system of the owning flow.
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/// * `stacking_relative_flow_origin`: Position of the origin of the owning flow with respect
|
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/// to its nearest ancestor stacking context.
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/// * `relative_containing_block_size`: The size of the containing block that
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/// `position: relative` makes use of.
|
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/// * `clip`: The region to clip the display items to.
|
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fn build_display_list(&mut self,
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||
state: &mut DisplayListBuildState,
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stacking_relative_flow_origin: &Point2D<Au>,
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||
relative_containing_block_size: &LogicalSize<Au>,
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||
relative_containing_block_mode: WritingMode,
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||
border_painting_mode: BorderPaintingMode,
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||
display_list_section: DisplayListSection,
|
||
clip: &ClippingRegion);
|
||
|
||
/// Adjusts the clipping region for all descendants of this fragment as appropriate.
|
||
fn adjust_clipping_region_for_children(&self,
|
||
current_clip: &mut ClippingRegion,
|
||
stacking_relative_border_box: &Rect<Au>);
|
||
|
||
/// Adjusts the clipping rectangle for a fragment to take the `clip` property into account
|
||
/// per CSS 2.1 § 11.1.2.
|
||
fn adjust_clip_for_style(&self,
|
||
parent_clip: &mut ClippingRegion,
|
||
stacking_relative_border_box: &Rect<Au>);
|
||
|
||
/// Builds the display items necessary to paint the selection and/or caret for this fragment,
|
||
/// if any.
|
||
fn build_display_items_for_selection_if_necessary(&self,
|
||
state: &mut DisplayListBuildState,
|
||
stacking_relative_border_box: &Rect<Au>,
|
||
display_list_section: DisplayListSection,
|
||
clip: &ClippingRegion);
|
||
|
||
/// Creates the text display item for one text fragment. This can be called multiple times for
|
||
/// one fragment if there are text shadows.
|
||
///
|
||
/// `text_shadow` will be `Some` if this is rendering a shadow.
|
||
fn build_display_list_for_text_fragment(&self,
|
||
state: &mut DisplayListBuildState,
|
||
text_fragment: &ScannedTextFragmentInfo,
|
||
stacking_relative_content_box: &Rect<Au>,
|
||
text_shadow: Option<&TextShadow>,
|
||
clip: &ClippingRegion);
|
||
|
||
/// Creates the display item for a text decoration: underline, overline, or line-through.
|
||
fn build_display_list_for_text_decoration(&self,
|
||
state: &mut DisplayListBuildState,
|
||
color: &RGBA,
|
||
stacking_relative_box: &LogicalRect<Au>,
|
||
clip: &ClippingRegion,
|
||
blur_radius: Au);
|
||
|
||
/// A helper method that `build_display_list` calls to create per-fragment-type display items.
|
||
fn build_fragment_type_specific_display_items(&mut self,
|
||
state: &mut DisplayListBuildState,
|
||
stacking_relative_border_box: &Rect<Au>,
|
||
clip: &ClippingRegion);
|
||
|
||
/// Creates a stacking context for associated fragment.
|
||
fn create_stacking_context(&self,
|
||
id: StackingContextId,
|
||
base_flow: &BaseFlow,
|
||
scroll_policy: ScrollPolicy,
|
||
mode: StackingContextCreationMode,
|
||
parent_scroll_id: ScrollRootId)
|
||
-> StackingContext;
|
||
|
||
|
||
/// The id of stacking context this fragment would create.
|
||
fn stacking_context_id(&self) -> StackingContextId;
|
||
}
|
||
|
||
fn handle_overlapping_radii(size: &Size2D<Au>, radii: &BorderRadii<Au>) -> BorderRadii<Au> {
|
||
// No two corners' border radii may add up to more than the length of the edge
|
||
// between them. To prevent that, all radii are scaled down uniformly.
|
||
fn scale_factor(radius_a: Au, radius_b: Au, edge_length: Au) -> f32 {
|
||
let required = radius_a + radius_b;
|
||
|
||
if required <= edge_length {
|
||
1.0
|
||
} else {
|
||
edge_length.to_f32_px() / required.to_f32_px()
|
||
}
|
||
}
|
||
|
||
let top_factor = scale_factor(radii.top_left.width, radii.top_right.width, size.width);
|
||
let bottom_factor = scale_factor(radii.bottom_left.width, radii.bottom_right.width, size.width);
|
||
let left_factor = scale_factor(radii.top_left.height, radii.bottom_left.height, size.height);
|
||
let right_factor = scale_factor(radii.top_right.height, radii.bottom_right.height, size.height);
|
||
let min_factor = top_factor.min(bottom_factor).min(left_factor).min(right_factor);
|
||
if min_factor < 1.0 {
|
||
radii.scale_by(min_factor)
|
||
} else {
|
||
*radii
|
||
}
|
||
}
|
||
|
||
fn build_border_radius(abs_bounds: &Rect<Au>, border_style: &style_structs::Border) -> BorderRadii<Au> {
|
||
// TODO(cgaebel): Support border radii even in the case of multiple border widths.
|
||
// This is an extension of supporting elliptical radii. For now, all percentage
|
||
// radii will be relative to the width.
|
||
|
||
handle_overlapping_radii(&abs_bounds.size, &BorderRadii {
|
||
top_left: model::specified_border_radius(border_style.border_top_left_radius,
|
||
abs_bounds.size.width),
|
||
top_right: model::specified_border_radius(border_style.border_top_right_radius,
|
||
abs_bounds.size.width),
|
||
bottom_right: model::specified_border_radius(border_style.border_bottom_right_radius,
|
||
abs_bounds.size.width),
|
||
bottom_left: model::specified_border_radius(border_style.border_bottom_left_radius,
|
||
abs_bounds.size.width),
|
||
})
|
||
}
|
||
|
||
impl FragmentDisplayListBuilding for Fragment {
|
||
fn build_display_list_for_background_if_applicable(&self,
|
||
state: &mut DisplayListBuildState,
|
||
style: &ServoComputedValues,
|
||
display_list_section: DisplayListSection,
|
||
absolute_bounds: &Rect<Au>,
|
||
clip: &ClippingRegion) {
|
||
// Adjust the clipping region as necessary to account for `border-radius`.
|
||
let border_radii = build_border_radius(absolute_bounds, style.get_border());
|
||
let mut clip = (*clip).clone();
|
||
if !border_radii.is_square() {
|
||
clip.intersect_with_rounded_rect(absolute_bounds, &border_radii)
|
||
}
|
||
let background = style.get_background();
|
||
|
||
// FIXME: This causes a lot of background colors to be displayed when they are clearly not
|
||
// needed. We could use display list optimization to clean this up, but it still seems
|
||
// inefficient. What we really want is something like "nearest ancestor element that
|
||
// doesn't have a fragment".
|
||
let background_color = style.resolve_color(background.background_color);
|
||
|
||
// 'background-clip' determines the area within which the background is painted.
|
||
// http://dev.w3.org/csswg/css-backgrounds-3/#the-background-clip
|
||
let mut bounds = *absolute_bounds;
|
||
|
||
// This is the clip for the color (which is the last element in the bg array)
|
||
let color_clip = get_cyclic(&background.background_clip.0,
|
||
background.background_image.0.len() - 1);
|
||
|
||
match *color_clip {
|
||
background_clip::single_value::T::border_box => {}
|
||
background_clip::single_value::T::padding_box => {
|
||
let border = style.logical_border_width().to_physical(style.writing_mode);
|
||
bounds.origin.x = bounds.origin.x + border.left;
|
||
bounds.origin.y = bounds.origin.y + border.top;
|
||
bounds.size.width = bounds.size.width - border.horizontal();
|
||
bounds.size.height = bounds.size.height - border.vertical();
|
||
}
|
||
background_clip::single_value::T::content_box => {
|
||
let border_padding = self.border_padding.to_physical(style.writing_mode);
|
||
bounds.origin.x = bounds.origin.x + border_padding.left;
|
||
bounds.origin.y = bounds.origin.y + border_padding.top;
|
||
bounds.size.width = bounds.size.width - border_padding.horizontal();
|
||
bounds.size.height = bounds.size.height - border_padding.vertical();
|
||
}
|
||
}
|
||
|
||
let base = state.create_base_display_item(&bounds,
|
||
&clip,
|
||
self.node,
|
||
style.get_cursor(Cursor::Default),
|
||
display_list_section);
|
||
state.add_display_item(
|
||
DisplayItem::SolidColor(box SolidColorDisplayItem {
|
||
base: base,
|
||
color: background_color.to_gfx_color(),
|
||
}));
|
||
|
||
// The background image is painted on top of the background color.
|
||
// Implements background image, per spec:
|
||
// http://www.w3.org/TR/CSS21/colors.html#background
|
||
let background = style.get_background();
|
||
for (i, background_image) in background.background_image.0.iter().enumerate().rev() {
|
||
match background_image.0 {
|
||
None => {}
|
||
Some(computed::Image::Gradient(ref gradient)) => {
|
||
// FIXME: Radial gradients aren't implemented yet.
|
||
if let GradientKind::Linear(_) = gradient.gradient_kind {
|
||
self.build_display_list_for_background_gradient(state,
|
||
display_list_section,
|
||
&bounds,
|
||
&clip,
|
||
gradient,
|
||
style);
|
||
}
|
||
}
|
||
Some(computed::Image::Url(ref image_url)) => {
|
||
if let Some(url) = image_url.url() {
|
||
self.build_display_list_for_background_image(state,
|
||
style,
|
||
display_list_section,
|
||
&bounds,
|
||
&clip,
|
||
url,
|
||
i);
|
||
}
|
||
}
|
||
Some(computed::Image::ImageRect(_)) => {
|
||
// TODO: Implement `-moz-image-rect`
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
fn compute_background_image_size(&self,
|
||
style: &ServoComputedValues,
|
||
bounds: &Rect<Au>,
|
||
image: &WebRenderImageInfo,
|
||
index: usize)
|
||
-> Size2D<Au> {
|
||
// If `image_aspect_ratio` < `bounds_aspect_ratio`, the image is tall; otherwise, it is
|
||
// wide.
|
||
let image_aspect_ratio = (image.width as f64) / (image.height as f64);
|
||
let bounds_aspect_ratio = bounds.size.width.to_f64_px() / bounds.size.height.to_f64_px();
|
||
let intrinsic_size = Size2D::new(Au::from_px(image.width as i32),
|
||
Au::from_px(image.height as i32));
|
||
let background_size = get_cyclic(&style.get_background().background_size.0, index).clone();
|
||
match (background_size, image_aspect_ratio < bounds_aspect_ratio) {
|
||
(background_size::single_value::T::Contain, false) |
|
||
(background_size::single_value::T::Cover, true) => {
|
||
Size2D::new(bounds.size.width,
|
||
Au::from_f64_px(bounds.size.width.to_f64_px() / image_aspect_ratio))
|
||
}
|
||
|
||
(background_size::single_value::T::Contain, true) |
|
||
(background_size::single_value::T::Cover, false) => {
|
||
Size2D::new(Au::from_f64_px(bounds.size.height.to_f64_px() * image_aspect_ratio),
|
||
bounds.size.height)
|
||
}
|
||
|
||
(background_size::single_value::T::Explicit(background_size::single_value
|
||
::ExplicitSize {
|
||
width,
|
||
height: LengthOrPercentageOrAuto::Auto,
|
||
}), _) => {
|
||
let width = MaybeAuto::from_style(width, bounds.size.width)
|
||
.specified_or_default(intrinsic_size.width);
|
||
Size2D::new(width, Au::from_f64_px(width.to_f64_px() / image_aspect_ratio))
|
||
}
|
||
|
||
(background_size::single_value::T::Explicit(background_size::single_value
|
||
::ExplicitSize {
|
||
width: LengthOrPercentageOrAuto::Auto,
|
||
height
|
||
}), _) => {
|
||
let height = MaybeAuto::from_style(height, bounds.size.height)
|
||
.specified_or_default(intrinsic_size.height);
|
||
Size2D::new(Au::from_f64_px(height.to_f64_px() * image_aspect_ratio), height)
|
||
}
|
||
|
||
(background_size::single_value::T::Explicit(background_size::single_value
|
||
::ExplicitSize {
|
||
width,
|
||
height
|
||
}), _) => {
|
||
Size2D::new(MaybeAuto::from_style(width, bounds.size.width)
|
||
.specified_or_default(intrinsic_size.width),
|
||
MaybeAuto::from_style(height, bounds.size.height)
|
||
.specified_or_default(intrinsic_size.height))
|
||
}
|
||
}
|
||
}
|
||
|
||
fn build_display_list_for_background_image(&self,
|
||
state: &mut DisplayListBuildState,
|
||
style: &ServoComputedValues,
|
||
display_list_section: DisplayListSection,
|
||
absolute_bounds: &Rect<Au>,
|
||
clip: &ClippingRegion,
|
||
image_url: &ServoUrl,
|
||
index: usize) {
|
||
let background = style.get_background();
|
||
let webrender_image = state.layout_context
|
||
.get_webrender_image_for_url(self.node,
|
||
image_url.clone(),
|
||
UsePlaceholder::No);
|
||
|
||
if let Some(webrender_image) = webrender_image {
|
||
debug!("(building display list) building background image");
|
||
|
||
// Use `background-size` to get the size.
|
||
let mut bounds = *absolute_bounds;
|
||
let image_size = self.compute_background_image_size(style, &bounds,
|
||
&webrender_image, index);
|
||
|
||
// Clip.
|
||
//
|
||
// TODO: Check the bounds to see if a clip item is actually required.
|
||
let mut clip = clip.clone();
|
||
clip.intersect_rect(&bounds);
|
||
|
||
// Background image should be positioned on the padding box basis.
|
||
let border = style.logical_border_width().to_physical(style.writing_mode);
|
||
|
||
// Use 'background-origin' to get the origin value.
|
||
let origin = get_cyclic(&background.background_origin.0, index);
|
||
let (mut origin_x, mut origin_y) = match *origin {
|
||
background_origin::single_value::T::padding_box => {
|
||
(Au(0), Au(0))
|
||
}
|
||
background_origin::single_value::T::border_box => {
|
||
(-border.left, -border.top)
|
||
}
|
||
background_origin::single_value::T::content_box => {
|
||
let border_padding = self.border_padding.to_physical(self.style.writing_mode);
|
||
(border_padding.left - border.left, border_padding.top - border.top)
|
||
}
|
||
};
|
||
|
||
// Use `background-attachment` to get the initial virtual origin
|
||
let attachment = get_cyclic(&background.background_attachment.0, index);
|
||
let (virtual_origin_x, virtual_origin_y) = match *attachment {
|
||
background_attachment::single_value::T::scroll => {
|
||
(absolute_bounds.origin.x, absolute_bounds.origin.y)
|
||
}
|
||
background_attachment::single_value::T::fixed => {
|
||
// If the ‘background-attachment’ value for this image is ‘fixed’, then
|
||
// 'background-origin' has no effect.
|
||
origin_x = Au(0);
|
||
origin_y = Au(0);
|
||
(Au(0), Au(0))
|
||
}
|
||
};
|
||
|
||
let horiz_position = *get_cyclic(&background.background_position_x.0, index);
|
||
let vert_position = *get_cyclic(&background.background_position_y.0, index);
|
||
// Use `background-position` to get the offset.
|
||
let horizontal_position = model::specified(horiz_position.0,
|
||
bounds.size.width - image_size.width);
|
||
let vertical_position = model::specified(vert_position.0,
|
||
bounds.size.height - image_size.height);
|
||
|
||
// The anchor position for this background, based on both the background-attachment
|
||
// and background-position properties.
|
||
let anchor_origin_x = border.left + virtual_origin_x + origin_x + horizontal_position;
|
||
let anchor_origin_y = border.top + virtual_origin_y + origin_y + vertical_position;
|
||
|
||
let mut tile_spacing = Size2D::zero();
|
||
let mut stretch_size = image_size;
|
||
|
||
// Adjust origin and size based on background-repeat
|
||
match *get_cyclic(&background.background_repeat.0, index) {
|
||
background_repeat::single_value::T::no_repeat => {
|
||
bounds.origin.x = anchor_origin_x;
|
||
bounds.origin.y = anchor_origin_y;
|
||
bounds.size.width = image_size.width;
|
||
bounds.size.height = image_size.height;
|
||
}
|
||
background_repeat::single_value::T::repeat_x => {
|
||
bounds.origin.y = anchor_origin_y;
|
||
bounds.size.height = image_size.height;
|
||
ImageFragmentInfo::tile_image(&mut bounds.origin.x,
|
||
&mut bounds.size.width,
|
||
anchor_origin_x,
|
||
image_size.width);
|
||
}
|
||
background_repeat::single_value::T::repeat_y => {
|
||
bounds.origin.x = anchor_origin_x;
|
||
bounds.size.width = image_size.width;
|
||
ImageFragmentInfo::tile_image(&mut bounds.origin.y,
|
||
&mut bounds.size.height,
|
||
anchor_origin_y,
|
||
image_size.height);
|
||
}
|
||
background_repeat::single_value::T::repeat => {
|
||
ImageFragmentInfo::tile_image(&mut bounds.origin.x,
|
||
&mut bounds.size.width,
|
||
anchor_origin_x,
|
||
image_size.width);
|
||
ImageFragmentInfo::tile_image(&mut bounds.origin.y,
|
||
&mut bounds.size.height,
|
||
anchor_origin_y,
|
||
image_size.height);
|
||
}
|
||
background_repeat::single_value::T::space => {
|
||
ImageFragmentInfo::tile_image_spaced(&mut bounds.origin.x,
|
||
&mut bounds.size.width,
|
||
&mut tile_spacing.width,
|
||
anchor_origin_x,
|
||
image_size.width);
|
||
ImageFragmentInfo::tile_image_spaced(&mut bounds.origin.y,
|
||
&mut bounds.size.height,
|
||
&mut tile_spacing.height,
|
||
anchor_origin_y,
|
||
image_size.height);
|
||
|
||
}
|
||
background_repeat::single_value::T::round => {
|
||
ImageFragmentInfo::tile_image_round(&mut bounds.origin.x,
|
||
&mut bounds.size.width,
|
||
anchor_origin_x,
|
||
&mut stretch_size.width);
|
||
ImageFragmentInfo::tile_image_round(&mut bounds.origin.y,
|
||
&mut bounds.size.height,
|
||
anchor_origin_y,
|
||
&mut stretch_size.height);
|
||
}
|
||
};
|
||
|
||
// Create the image display item.
|
||
let base = state.create_base_display_item(&bounds,
|
||
&clip,
|
||
self.node,
|
||
style.get_cursor(Cursor::Default),
|
||
display_list_section);
|
||
state.add_display_item(DisplayItem::Image(box ImageDisplayItem {
|
||
base: base,
|
||
webrender_image: webrender_image,
|
||
image_data: None,
|
||
stretch_size: stretch_size,
|
||
tile_spacing: tile_spacing,
|
||
image_rendering: style.get_inheritedbox().image_rendering.clone(),
|
||
}));
|
||
|
||
}
|
||
}
|
||
|
||
fn convert_gradient(&self,
|
||
absolute_bounds: &Rect<Au>,
|
||
gradient: &Gradient,
|
||
style: &ServoComputedValues) -> Option<display_list::Gradient> {
|
||
// FIXME: Repeating gradients aren't implemented yet.
|
||
if gradient.repeating {
|
||
return None;
|
||
}
|
||
let angle = if let GradientKind::Linear(angle_or_corner) = gradient.gradient_kind {
|
||
match angle_or_corner {
|
||
AngleOrCorner::Angle(angle) => angle.radians(),
|
||
AngleOrCorner::Corner(horizontal, vertical) => {
|
||
// This the angle for one of the diagonals of the box. Our angle
|
||
// will either be this one, this one + PI, or one of the other
|
||
// two perpendicular angles.
|
||
let atan = (absolute_bounds.size.height.to_f32_px() /
|
||
absolute_bounds.size.width.to_f32_px()).atan();
|
||
match (horizontal, vertical) {
|
||
(HorizontalDirection::Right, VerticalDirection::Bottom)
|
||
=> f32::consts::PI - atan,
|
||
(HorizontalDirection::Left, VerticalDirection::Bottom)
|
||
=> f32::consts::PI + atan,
|
||
(HorizontalDirection::Right, VerticalDirection::Top)
|
||
=> atan,
|
||
(HorizontalDirection::Left, VerticalDirection::Top)
|
||
=> -atan,
|
||
}
|
||
}
|
||
}
|
||
} else {
|
||
// FIXME: Radial gradients aren't implemented yet.
|
||
return None;
|
||
};
|
||
|
||
// Get correct gradient line length, based on:
|
||
// https://drafts.csswg.org/css-images-3/#linear-gradients
|
||
let dir = Point2D::new(angle.sin(), -angle.cos());
|
||
|
||
let line_length = (dir.x * absolute_bounds.size.width.to_f32_px()).abs() +
|
||
(dir.y * absolute_bounds.size.height.to_f32_px()).abs();
|
||
|
||
let inv_dir_length = 1.0 / (dir.x * dir.x + dir.y * dir.y).sqrt();
|
||
|
||
// This is the vector between the center and the ending point; i.e. half
|
||
// of the distance between the starting point and the ending point.
|
||
let delta = Point2D::new(Au::from_f32_px(dir.x * inv_dir_length * line_length / 2.0),
|
||
Au::from_f32_px(dir.y * inv_dir_length * line_length / 2.0));
|
||
|
||
// This is the length of the gradient line.
|
||
let length = Au::from_f32_px(
|
||
(delta.x.to_f32_px() * 2.0).hypot(delta.y.to_f32_px() * 2.0));
|
||
|
||
// Determine the position of each stop per CSS-IMAGES § 3.4.
|
||
//
|
||
// FIXME(#3908, pcwalton): Make sure later stops can't be behind earlier stops.
|
||
let mut stops = Vec::with_capacity(gradient.stops.len());
|
||
let mut stop_run = None;
|
||
for (i, stop) in gradient.stops.iter().enumerate() {
|
||
let offset = match stop.position {
|
||
None => {
|
||
if stop_run.is_none() {
|
||
// Initialize a new stop run.
|
||
let start_offset = if i == 0 {
|
||
0.0
|
||
} else {
|
||
// `unwrap()` here should never fail because this is the beginning of
|
||
// a stop run, which is always bounded by a length or percentage.
|
||
position_to_offset(gradient.stops[i - 1].position.unwrap(), length)
|
||
};
|
||
let (end_index, end_offset) =
|
||
match gradient.stops[i..]
|
||
.iter()
|
||
.enumerate()
|
||
.find(|&(_, ref stop)| stop.position.is_some()) {
|
||
None => (gradient.stops.len() - 1, 1.0),
|
||
Some((end_index, end_stop)) => {
|
||
// `unwrap()` here should never fail because this is the end of
|
||
// a stop run, which is always bounded by a length or
|
||
// percentage.
|
||
(end_index,
|
||
position_to_offset(end_stop.position.unwrap(), length))
|
||
}
|
||
};
|
||
stop_run = Some(StopRun {
|
||
start_offset: start_offset,
|
||
end_offset: end_offset,
|
||
start_index: i,
|
||
stop_count: end_index - i,
|
||
})
|
||
}
|
||
|
||
let stop_run = stop_run.unwrap();
|
||
let stop_run_length = stop_run.end_offset - stop_run.start_offset;
|
||
if stop_run.stop_count == 0 {
|
||
stop_run.end_offset
|
||
} else {
|
||
stop_run.start_offset +
|
||
stop_run_length * (i - stop_run.start_index) as f32 /
|
||
(stop_run.stop_count as f32)
|
||
}
|
||
}
|
||
Some(position) => {
|
||
stop_run = None;
|
||
position_to_offset(position, length)
|
||
}
|
||
};
|
||
stops.push(GradientStop {
|
||
offset: offset,
|
||
color: style.resolve_color(stop.color).to_gfx_color()
|
||
})
|
||
}
|
||
|
||
let center = Point2D::new(absolute_bounds.origin.x + absolute_bounds.size.width / 2,
|
||
absolute_bounds.origin.y + absolute_bounds.size.height / 2);
|
||
|
||
Some(display_list::Gradient {
|
||
start_point: center - delta,
|
||
end_point: center + delta,
|
||
stops: stops,
|
||
})
|
||
}
|
||
|
||
fn build_display_list_for_background_gradient(&self,
|
||
state: &mut DisplayListBuildState,
|
||
display_list_section: DisplayListSection,
|
||
absolute_bounds: &Rect<Au>,
|
||
clip: &ClippingRegion,
|
||
gradient: &Gradient,
|
||
style: &ServoComputedValues) {
|
||
let mut clip = clip.clone();
|
||
clip.intersect_rect(absolute_bounds);
|
||
|
||
let grad = self.convert_gradient(absolute_bounds, gradient, style);
|
||
|
||
if let Some(x) = grad {
|
||
let base = state.create_base_display_item(absolute_bounds,
|
||
&clip,
|
||
self.node,
|
||
style.get_cursor(Cursor::Default),
|
||
display_list_section);
|
||
|
||
let gradient_display_item = DisplayItem::Gradient(box GradientDisplayItem {
|
||
base: base,
|
||
gradient: x,
|
||
});
|
||
|
||
state.add_display_item(gradient_display_item);
|
||
}
|
||
}
|
||
|
||
fn build_display_list_for_box_shadow_if_applicable(&self,
|
||
state: &mut DisplayListBuildState,
|
||
style: &ServoComputedValues,
|
||
display_list_section: DisplayListSection,
|
||
absolute_bounds: &Rect<Au>,
|
||
clip: &ClippingRegion) {
|
||
// NB: According to CSS-BACKGROUNDS, box shadows render in *reverse* order (front to back).
|
||
for box_shadow in style.get_effects().box_shadow.0.iter().rev() {
|
||
let bounds =
|
||
shadow_bounds(&absolute_bounds.translate(&Point2D::new(box_shadow.offset_x,
|
||
box_shadow.offset_y)),
|
||
box_shadow.blur_radius,
|
||
box_shadow.spread_radius);
|
||
|
||
// TODO(pcwalton): Multiple border radii; elliptical border radii.
|
||
let base = state.create_base_display_item(&bounds,
|
||
&clip,
|
||
self.node,
|
||
style.get_cursor(Cursor::Default),
|
||
display_list_section);
|
||
state.add_display_item(DisplayItem::BoxShadow(box BoxShadowDisplayItem {
|
||
base: base,
|
||
box_bounds: *absolute_bounds,
|
||
color: style.resolve_color(box_shadow.color).to_gfx_color(),
|
||
offset: Point2D::new(box_shadow.offset_x, box_shadow.offset_y),
|
||
blur_radius: box_shadow.blur_radius,
|
||
spread_radius: box_shadow.spread_radius,
|
||
border_radius: model::specified_border_radius(style.get_border()
|
||
.border_top_left_radius,
|
||
absolute_bounds.size.width).width,
|
||
clip_mode: if box_shadow.inset {
|
||
BoxShadowClipMode::Inset
|
||
} else {
|
||
BoxShadowClipMode::Outset
|
||
},
|
||
}));
|
||
}
|
||
}
|
||
|
||
fn build_display_list_for_borders_if_applicable(
|
||
&self,
|
||
state: &mut DisplayListBuildState,
|
||
style: &ServoComputedValues,
|
||
border_painting_mode: BorderPaintingMode,
|
||
bounds: &Rect<Au>,
|
||
display_list_section: DisplayListSection,
|
||
clip: &ClippingRegion) {
|
||
let mut border = style.logical_border_width();
|
||
|
||
match border_painting_mode {
|
||
BorderPaintingMode::Separate => {}
|
||
BorderPaintingMode::Collapse(collapsed_borders) => {
|
||
collapsed_borders.adjust_border_widths_for_painting(&mut border)
|
||
}
|
||
BorderPaintingMode::Hidden => return,
|
||
}
|
||
if border.is_zero() {
|
||
return
|
||
}
|
||
|
||
let border_style_struct = style.get_border();
|
||
let mut colors = SideOffsets2D::new(border_style_struct.border_top_color,
|
||
border_style_struct.border_right_color,
|
||
border_style_struct.border_bottom_color,
|
||
border_style_struct.border_left_color);
|
||
let mut border_style = SideOffsets2D::new(border_style_struct.border_top_style,
|
||
border_style_struct.border_right_style,
|
||
border_style_struct.border_bottom_style,
|
||
border_style_struct.border_left_style);
|
||
if let BorderPaintingMode::Collapse(collapsed_borders) = border_painting_mode {
|
||
collapsed_borders.adjust_border_colors_and_styles_for_painting(&mut colors,
|
||
&mut border_style,
|
||
style.writing_mode);
|
||
}
|
||
|
||
let colors = SideOffsets2D::new(style.resolve_color(colors.top),
|
||
style.resolve_color(colors.right),
|
||
style.resolve_color(colors.bottom),
|
||
style.resolve_color(colors.left));
|
||
|
||
// If this border collapses, then we draw outside the boundaries we were given.
|
||
let mut bounds = *bounds;
|
||
if let BorderPaintingMode::Collapse(collapsed_borders) = border_painting_mode {
|
||
collapsed_borders.adjust_border_bounds_for_painting(&mut bounds, style.writing_mode)
|
||
}
|
||
|
||
// Append the border to the display list.
|
||
let base = state.create_base_display_item(&bounds,
|
||
&clip,
|
||
self.node,
|
||
style.get_cursor(Cursor::Default),
|
||
display_list_section);
|
||
|
||
match border_style_struct.border_image_source.0 {
|
||
None => {
|
||
state.add_display_item(DisplayItem::Border(box BorderDisplayItem {
|
||
base: base,
|
||
border_widths: border.to_physical(style.writing_mode),
|
||
details: BorderDetails::Normal(NormalBorder {
|
||
color: SideOffsets2D::new(colors.top.to_gfx_color(),
|
||
colors.right.to_gfx_color(),
|
||
colors.bottom.to_gfx_color(),
|
||
colors.left.to_gfx_color()),
|
||
style: border_style,
|
||
radius: build_border_radius(&bounds, border_style_struct),
|
||
}),
|
||
}));
|
||
}
|
||
Some(computed::Image::Gradient(ref gradient)) => {
|
||
match gradient.gradient_kind {
|
||
GradientKind::Linear(_) => {
|
||
let grad = self.convert_gradient(&bounds, gradient, style);
|
||
|
||
if let Some(x) = grad {
|
||
state.add_display_item(DisplayItem::Border(box BorderDisplayItem {
|
||
base: base,
|
||
border_widths: border.to_physical(style.writing_mode),
|
||
details: BorderDetails::Gradient(display_list::GradientBorder {
|
||
gradient: x,
|
||
|
||
// TODO(gw): Support border-image-outset
|
||
outset: SideOffsets2D::zero(),
|
||
}),
|
||
}));
|
||
}
|
||
}
|
||
GradientKind::Radial(_, _) => {
|
||
// TODO(gw): Handle border-image with radial gradient.
|
||
}
|
||
}
|
||
}
|
||
Some(computed::Image::ImageRect(..)) => {
|
||
// TODO: Handle border-image with `-moz-image-rect`.
|
||
}
|
||
Some(computed::Image::Url(ref image_url)) => {
|
||
if let Some(url) = image_url.url() {
|
||
let webrender_image = state.layout_context
|
||
.get_webrender_image_for_url(self.node,
|
||
url.clone(),
|
||
UsePlaceholder::No);
|
||
if let Some(webrender_image) = webrender_image {
|
||
// The corners array is guaranteed to be len=4 by the css parser.
|
||
let corners = &border_style_struct.border_image_slice.corners;
|
||
|
||
state.add_display_item(DisplayItem::Border(box BorderDisplayItem {
|
||
base: base,
|
||
border_widths: border.to_physical(style.writing_mode),
|
||
details: BorderDetails::Image(ImageBorder {
|
||
image: webrender_image,
|
||
fill: border_style_struct.border_image_slice.fill,
|
||
slice: SideOffsets2D::new(corners[0].resolve(webrender_image.height),
|
||
corners[1].resolve(webrender_image.width),
|
||
corners[2].resolve(webrender_image.height),
|
||
corners[3].resolve(webrender_image.width)),
|
||
// TODO(gw): Support border-image-outset
|
||
outset: SideOffsets2D::zero(),
|
||
repeat_horizontal: convert_repeat_mode(border_style_struct.border_image_repeat.0),
|
||
repeat_vertical: convert_repeat_mode(border_style_struct.border_image_repeat.1),
|
||
}),
|
||
}));
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
fn build_display_list_for_outline_if_applicable(&self,
|
||
state: &mut DisplayListBuildState,
|
||
style: &ServoComputedValues,
|
||
bounds: &Rect<Au>,
|
||
clip: &ClippingRegion) {
|
||
use style::values::Either;
|
||
|
||
let width = style.get_outline().outline_width;
|
||
if width == Au(0) {
|
||
return
|
||
}
|
||
|
||
let outline_style = match style.get_outline().outline_style {
|
||
Either::First(_auto) => border_style::T::solid,
|
||
Either::Second(border_style::T::none) => return,
|
||
Either::Second(border_style) => border_style
|
||
};
|
||
|
||
// Outlines are not accounted for in the dimensions of the border box, so adjust the
|
||
// absolute bounds.
|
||
let mut bounds = *bounds;
|
||
let offset = width + style.get_outline().outline_offset;
|
||
bounds.origin.x = bounds.origin.x - offset;
|
||
bounds.origin.y = bounds.origin.y - offset;
|
||
bounds.size.width = bounds.size.width + offset + offset;
|
||
bounds.size.height = bounds.size.height + offset + offset;
|
||
|
||
// Append the outline to the display list.
|
||
let color = style.resolve_color(style.get_outline().outline_color).to_gfx_color();
|
||
let base = state.create_base_display_item(&bounds,
|
||
&clip,
|
||
self.node,
|
||
style.get_cursor(Cursor::Default),
|
||
DisplayListSection::Outlines);
|
||
state.add_display_item(DisplayItem::Border(box BorderDisplayItem {
|
||
base: base,
|
||
border_widths: SideOffsets2D::new_all_same(width),
|
||
details: BorderDetails::Normal(NormalBorder {
|
||
color: SideOffsets2D::new_all_same(color),
|
||
style: SideOffsets2D::new_all_same(outline_style),
|
||
radius: Default::default(),
|
||
}),
|
||
}));
|
||
}
|
||
|
||
fn build_debug_borders_around_text_fragments(&self,
|
||
state: &mut DisplayListBuildState,
|
||
style: &ServoComputedValues,
|
||
stacking_relative_border_box: &Rect<Au>,
|
||
stacking_relative_content_box: &Rect<Au>,
|
||
text_fragment: &ScannedTextFragmentInfo,
|
||
clip: &ClippingRegion) {
|
||
// FIXME(pcwalton, #2795): Get the real container size.
|
||
let container_size = Size2D::zero();
|
||
|
||
// Compute the text fragment bounds and draw a border surrounding them.
|
||
let base = state.create_base_display_item(stacking_relative_border_box,
|
||
clip,
|
||
self.node,
|
||
style.get_cursor(Cursor::Default),
|
||
DisplayListSection::Content);
|
||
state.add_display_item(DisplayItem::Border(box BorderDisplayItem {
|
||
base: base,
|
||
border_widths: SideOffsets2D::new_all_same(Au::from_px(1)),
|
||
details: BorderDetails::Normal(NormalBorder {
|
||
color: SideOffsets2D::new_all_same(ColorF::rgb(0, 0, 200)),
|
||
style: SideOffsets2D::new_all_same(border_style::T::solid),
|
||
radius: Default::default(),
|
||
}),
|
||
}));
|
||
|
||
// Draw a rectangle representing the baselines.
|
||
let mut baseline = LogicalRect::from_physical(self.style.writing_mode,
|
||
*stacking_relative_content_box,
|
||
container_size);
|
||
baseline.start.b = baseline.start.b + text_fragment.run.ascent();
|
||
baseline.size.block = Au(0);
|
||
let baseline = baseline.to_physical(self.style.writing_mode, container_size);
|
||
|
||
let base = state.create_base_display_item(&baseline,
|
||
clip,
|
||
self.node,
|
||
style.get_cursor(Cursor::Default),
|
||
DisplayListSection::Content);
|
||
state.add_display_item(DisplayItem::Line(box LineDisplayItem {
|
||
base: base,
|
||
color: ColorF::rgb(0, 200, 0),
|
||
style: border_style::T::dashed,
|
||
}));
|
||
}
|
||
|
||
fn build_debug_borders_around_fragment(&self,
|
||
state: &mut DisplayListBuildState,
|
||
stacking_relative_border_box: &Rect<Au>,
|
||
clip: &ClippingRegion) {
|
||
// This prints a debug border around the border of this fragment.
|
||
let base = state.create_base_display_item(stacking_relative_border_box,
|
||
clip,
|
||
self.node,
|
||
self.style.get_cursor(Cursor::Default),
|
||
DisplayListSection::Content);
|
||
state.add_display_item(DisplayItem::Border(box BorderDisplayItem {
|
||
base: base,
|
||
border_widths: SideOffsets2D::new_all_same(Au::from_px(1)),
|
||
details: BorderDetails::Normal(NormalBorder {
|
||
color: SideOffsets2D::new_all_same(ColorF::rgb(0, 0, 200)),
|
||
style: SideOffsets2D::new_all_same(border_style::T::solid),
|
||
radius: Default::default(),
|
||
}),
|
||
}));
|
||
}
|
||
|
||
fn adjust_clip_for_style(&self,
|
||
parent_clip: &mut ClippingRegion,
|
||
stacking_relative_border_box: &Rect<Au>) {
|
||
use style::values::Either;
|
||
// Account for `clip` per CSS 2.1 § 11.1.2.
|
||
let style_clip_rect = match (self.style().get_box().position,
|
||
self.style().get_effects().clip) {
|
||
(position::T::absolute, Either::First(style_clip_rect)) => style_clip_rect,
|
||
_ => return,
|
||
};
|
||
|
||
// FIXME(pcwalton, #2795): Get the real container size.
|
||
let clip_origin = Point2D::new(stacking_relative_border_box.origin.x +
|
||
style_clip_rect.left.unwrap_or(Au(0)),
|
||
stacking_relative_border_box.origin.y +
|
||
style_clip_rect.top.unwrap_or(Au(0)));
|
||
let right = style_clip_rect.right.unwrap_or(stacking_relative_border_box.size.width);
|
||
let bottom = style_clip_rect.bottom.unwrap_or(stacking_relative_border_box.size.height);
|
||
let clip_size = Size2D::new(right - clip_origin.x, bottom - clip_origin.y);
|
||
parent_clip.intersect_rect(&Rect::new(clip_origin, clip_size))
|
||
}
|
||
|
||
fn build_display_items_for_selection_if_necessary(&self,
|
||
state: &mut DisplayListBuildState,
|
||
stacking_relative_border_box: &Rect<Au>,
|
||
display_list_section: DisplayListSection,
|
||
clip: &ClippingRegion) {
|
||
let scanned_text_fragment_info = match self.specific {
|
||
SpecificFragmentInfo::ScannedText(ref scanned_text_fragment_info) => {
|
||
scanned_text_fragment_info
|
||
}
|
||
_ => return,
|
||
};
|
||
|
||
// Draw a highlighted background if the text is selected.
|
||
//
|
||
// TODO: Allow non-text fragments to be selected too.
|
||
if scanned_text_fragment_info.selected() {
|
||
let style = self.selected_style();
|
||
let background_color = style.resolve_color(style.get_background().background_color);
|
||
let base = state.create_base_display_item(stacking_relative_border_box,
|
||
&clip,
|
||
self.node,
|
||
self.style.get_cursor(Cursor::Default),
|
||
display_list_section);
|
||
state.add_display_item(
|
||
DisplayItem::SolidColor(box SolidColorDisplayItem {
|
||
base: base,
|
||
color: background_color.to_gfx_color(),
|
||
}));
|
||
}
|
||
|
||
// Draw a caret at the insertion point.
|
||
let insertion_point_index = match scanned_text_fragment_info.insertion_point {
|
||
Some(insertion_point_index) => insertion_point_index,
|
||
None => return,
|
||
};
|
||
let range = Range::new(scanned_text_fragment_info.range.begin(),
|
||
insertion_point_index - scanned_text_fragment_info.range.begin());
|
||
let advance = scanned_text_fragment_info.run.advance_for_range(&range);
|
||
|
||
let insertion_point_bounds;
|
||
let cursor;
|
||
if !self.style.writing_mode.is_vertical() {
|
||
insertion_point_bounds =
|
||
Rect::new(Point2D::new(stacking_relative_border_box.origin.x + advance,
|
||
stacking_relative_border_box.origin.y),
|
||
Size2D::new(INSERTION_POINT_LOGICAL_WIDTH,
|
||
stacking_relative_border_box.size.height));
|
||
cursor = Cursor::Text;
|
||
} else {
|
||
insertion_point_bounds =
|
||
Rect::new(Point2D::new(stacking_relative_border_box.origin.x,
|
||
stacking_relative_border_box.origin.y + advance),
|
||
Size2D::new(stacking_relative_border_box.size.width,
|
||
INSERTION_POINT_LOGICAL_WIDTH));
|
||
cursor = Cursor::VerticalText;
|
||
};
|
||
|
||
let base = state.create_base_display_item(&insertion_point_bounds,
|
||
&clip,
|
||
self.node,
|
||
self.style.get_cursor(cursor),
|
||
display_list_section);
|
||
state.add_display_item(DisplayItem::SolidColor(box SolidColorDisplayItem {
|
||
base: base,
|
||
color: self.style().get_color().color.to_gfx_color(),
|
||
}));
|
||
}
|
||
|
||
fn build_display_list(&mut self,
|
||
state: &mut DisplayListBuildState,
|
||
stacking_relative_flow_origin: &Point2D<Au>,
|
||
relative_containing_block_size: &LogicalSize<Au>,
|
||
relative_containing_block_mode: WritingMode,
|
||
border_painting_mode: BorderPaintingMode,
|
||
display_list_section: DisplayListSection,
|
||
clip: &ClippingRegion) {
|
||
self.restyle_damage.remove(REPAINT);
|
||
if self.style().get_inheritedbox().visibility != visibility::T::visible {
|
||
return
|
||
}
|
||
|
||
// Compute the fragment position relative to the parent stacking context. If the fragment
|
||
// itself establishes a stacking context, then the origin of its position will be (0, 0)
|
||
// for the purposes of this computation.
|
||
let stacking_relative_border_box =
|
||
self.stacking_relative_border_box(stacking_relative_flow_origin,
|
||
relative_containing_block_size,
|
||
relative_containing_block_mode,
|
||
CoordinateSystem::Own);
|
||
|
||
debug!("Fragment::build_display_list at rel={:?}, abs={:?}, flow origin={:?}: {:?}",
|
||
self.border_box,
|
||
stacking_relative_border_box,
|
||
stacking_relative_flow_origin,
|
||
self);
|
||
|
||
// Check the clip rect. If there's nothing to render at all, don't even construct display
|
||
// list items.
|
||
let empty_rect = !clip.might_intersect_rect(&stacking_relative_border_box);
|
||
if self.is_primary_fragment() && !empty_rect {
|
||
// Add shadows, background, borders, and outlines, if applicable.
|
||
if let Some(ref inline_context) = self.inline_context {
|
||
for node in inline_context.nodes.iter().rev() {
|
||
self.build_display_list_for_background_if_applicable(
|
||
state,
|
||
&*node.style,
|
||
display_list_section,
|
||
&stacking_relative_border_box,
|
||
clip);
|
||
self.build_display_list_for_box_shadow_if_applicable(
|
||
state,
|
||
&*node.style,
|
||
display_list_section,
|
||
&stacking_relative_border_box,
|
||
clip);
|
||
|
||
let mut style = node.style.clone();
|
||
properties::modify_border_style_for_inline_sides(
|
||
&mut style,
|
||
node.flags.contains(FIRST_FRAGMENT_OF_ELEMENT),
|
||
node.flags.contains(LAST_FRAGMENT_OF_ELEMENT));
|
||
self.build_display_list_for_borders_if_applicable(
|
||
state,
|
||
&*style,
|
||
border_painting_mode,
|
||
&stacking_relative_border_box,
|
||
display_list_section,
|
||
clip);
|
||
|
||
self.build_display_list_for_outline_if_applicable(
|
||
state,
|
||
&*node.style,
|
||
&stacking_relative_border_box,
|
||
clip);
|
||
}
|
||
}
|
||
|
||
if !self.is_scanned_text_fragment() {
|
||
self.build_display_list_for_background_if_applicable(state,
|
||
&*self.style,
|
||
display_list_section,
|
||
&stacking_relative_border_box,
|
||
clip);
|
||
self.build_display_list_for_box_shadow_if_applicable(state,
|
||
&*self.style,
|
||
display_list_section,
|
||
&stacking_relative_border_box,
|
||
clip);
|
||
self.build_display_list_for_borders_if_applicable(state,
|
||
&*self.style,
|
||
border_painting_mode,
|
||
&stacking_relative_border_box,
|
||
display_list_section,
|
||
clip);
|
||
self.build_display_list_for_outline_if_applicable(state,
|
||
&*self.style,
|
||
&stacking_relative_border_box,
|
||
clip);
|
||
}
|
||
}
|
||
|
||
if self.is_primary_fragment() {
|
||
// Paint the selection point if necessary. Even an empty text fragment may have an
|
||
// insertion point, so we do this even if `empty_rect` is true.
|
||
self.build_display_items_for_selection_if_necessary(state,
|
||
&stacking_relative_border_box,
|
||
display_list_section,
|
||
clip);
|
||
}
|
||
|
||
if empty_rect {
|
||
return
|
||
}
|
||
|
||
debug!("Fragment::build_display_list: intersected. Adding display item...");
|
||
|
||
// Create special per-fragment-type display items.
|
||
self.build_fragment_type_specific_display_items(state,
|
||
&stacking_relative_border_box,
|
||
clip);
|
||
|
||
if opts::get().show_debug_fragment_borders {
|
||
self.build_debug_borders_around_fragment(state, &stacking_relative_border_box, clip)
|
||
}
|
||
}
|
||
|
||
fn build_fragment_type_specific_display_items(&mut self,
|
||
state: &mut DisplayListBuildState,
|
||
stacking_relative_border_box: &Rect<Au>,
|
||
clip: &ClippingRegion) {
|
||
// Compute the context box position relative to the parent stacking context.
|
||
let stacking_relative_content_box =
|
||
self.stacking_relative_content_box(stacking_relative_border_box);
|
||
|
||
match self.specific {
|
||
SpecificFragmentInfo::TruncatedFragment(box TruncatedFragmentInfo {
|
||
text_info: Some(ref text_fragment),
|
||
..
|
||
}) |
|
||
SpecificFragmentInfo::ScannedText(box ref text_fragment) => {
|
||
// Create items for shadows.
|
||
//
|
||
// NB: According to CSS-BACKGROUNDS, text shadows render in *reverse* order (front
|
||
// to back).
|
||
|
||
for text_shadow in self.style.get_inheritedtext().text_shadow.0.iter().rev() {
|
||
self.build_display_list_for_text_fragment(state,
|
||
&*text_fragment,
|
||
&stacking_relative_content_box,
|
||
Some(text_shadow),
|
||
clip);
|
||
}
|
||
|
||
// Create the main text display item.
|
||
self.build_display_list_for_text_fragment(state,
|
||
&*text_fragment,
|
||
&stacking_relative_content_box,
|
||
None,
|
||
clip);
|
||
|
||
if opts::get().show_debug_fragment_borders {
|
||
self.build_debug_borders_around_text_fragments(state,
|
||
self.style(),
|
||
stacking_relative_border_box,
|
||
&stacking_relative_content_box,
|
||
&*text_fragment,
|
||
clip);
|
||
}
|
||
}
|
||
SpecificFragmentInfo::Generic |
|
||
SpecificFragmentInfo::GeneratedContent(..) |
|
||
SpecificFragmentInfo::Table |
|
||
SpecificFragmentInfo::TableCell |
|
||
SpecificFragmentInfo::TableRow |
|
||
SpecificFragmentInfo::TableWrapper |
|
||
SpecificFragmentInfo::Multicol |
|
||
SpecificFragmentInfo::MulticolColumn |
|
||
SpecificFragmentInfo::InlineBlock(_) |
|
||
SpecificFragmentInfo::InlineAbsoluteHypothetical(_) |
|
||
SpecificFragmentInfo::InlineAbsolute(_) |
|
||
SpecificFragmentInfo::TruncatedFragment(_) |
|
||
SpecificFragmentInfo::Svg(_) => {
|
||
if opts::get().show_debug_fragment_borders {
|
||
self.build_debug_borders_around_fragment(state,
|
||
stacking_relative_border_box,
|
||
clip);
|
||
}
|
||
}
|
||
SpecificFragmentInfo::Iframe(ref fragment_info) => {
|
||
if !stacking_relative_content_box.is_empty() {
|
||
let base = state.create_base_display_item(
|
||
&stacking_relative_content_box,
|
||
clip,
|
||
self.node,
|
||
self.style.get_cursor(Cursor::Default),
|
||
DisplayListSection::Content);
|
||
let item = DisplayItem::Iframe(box IframeDisplayItem {
|
||
base: base,
|
||
iframe: fragment_info.pipeline_id,
|
||
});
|
||
|
||
let size = Size2D::new(item.bounds().size.width.to_f32_px(),
|
||
item.bounds().size.height.to_f32_px());
|
||
state.iframe_sizes.push((fragment_info.pipeline_id, TypedSize2D::from_untyped(&size)));
|
||
|
||
state.add_display_item(item);
|
||
}
|
||
}
|
||
SpecificFragmentInfo::Image(ref mut image_fragment) => {
|
||
// Place the image into the display list.
|
||
if let Some(ref image) = image_fragment.image {
|
||
let base = state.create_base_display_item(
|
||
&stacking_relative_content_box,
|
||
clip,
|
||
self.node,
|
||
self.style.get_cursor(Cursor::Default),
|
||
DisplayListSection::Content);
|
||
state.add_display_item(DisplayItem::Image(box ImageDisplayItem {
|
||
base: base,
|
||
webrender_image: WebRenderImageInfo::from_image(image),
|
||
image_data: Some(Arc::new(image.bytes.clone())),
|
||
stretch_size: stacking_relative_content_box.size,
|
||
tile_spacing: Size2D::zero(),
|
||
image_rendering: self.style.get_inheritedbox().image_rendering.clone(),
|
||
}));
|
||
}
|
||
}
|
||
SpecificFragmentInfo::Canvas(ref canvas_fragment_info) => {
|
||
let computed_width = canvas_fragment_info.dom_width.to_px();
|
||
let computed_height = canvas_fragment_info.dom_height.to_px();
|
||
|
||
let canvas_data = match canvas_fragment_info.ipc_renderer {
|
||
Some(ref ipc_renderer) => {
|
||
let ipc_renderer = ipc_renderer.lock().unwrap();
|
||
let (sender, receiver) = ipc::channel().unwrap();
|
||
ipc_renderer.send(CanvasMsg::FromLayout(
|
||
FromLayoutMsg::SendData(sender))).unwrap();
|
||
receiver.recv().unwrap()
|
||
},
|
||
None => return,
|
||
};
|
||
|
||
let base = state.create_base_display_item(
|
||
&stacking_relative_content_box,
|
||
clip,
|
||
self.node,
|
||
self.style.get_cursor(Cursor::Default),
|
||
DisplayListSection::Content);
|
||
let display_item = match canvas_data {
|
||
CanvasData::Image(canvas_data) => {
|
||
DisplayItem::Image(box ImageDisplayItem {
|
||
base: base,
|
||
webrender_image: WebRenderImageInfo {
|
||
width: computed_width as u32,
|
||
height: computed_height as u32,
|
||
format: PixelFormat::RGBA8,
|
||
key: Some(canvas_data.image_key),
|
||
},
|
||
image_data: None,
|
||
stretch_size: stacking_relative_content_box.size,
|
||
tile_spacing: Size2D::zero(),
|
||
image_rendering: image_rendering::T::auto,
|
||
})
|
||
}
|
||
CanvasData::WebGL(context_id) => {
|
||
DisplayItem::WebGL(box WebGLDisplayItem {
|
||
base: base,
|
||
context_id: context_id,
|
||
})
|
||
}
|
||
};
|
||
|
||
state.add_display_item(display_item);
|
||
}
|
||
SpecificFragmentInfo::UnscannedText(_) => {
|
||
panic!("Shouldn't see unscanned fragments here.")
|
||
}
|
||
SpecificFragmentInfo::TableColumn(_) => {
|
||
panic!("Shouldn't see table column fragments here.")
|
||
}
|
||
}
|
||
}
|
||
|
||
fn stacking_context_id(&self) -> StackingContextId {
|
||
StackingContextId::new_of_type(self.node.id() as usize, self.fragment_type())
|
||
}
|
||
|
||
fn create_stacking_context(&self,
|
||
id: StackingContextId,
|
||
base_flow: &BaseFlow,
|
||
scroll_policy: ScrollPolicy,
|
||
mode: StackingContextCreationMode,
|
||
parent_scroll_id: ScrollRootId)
|
||
-> StackingContext {
|
||
let border_box =
|
||
self.stacking_relative_border_box(&base_flow.stacking_relative_position,
|
||
&base_flow.early_absolute_position_info
|
||
.relative_containing_block_size,
|
||
base_flow.early_absolute_position_info
|
||
.relative_containing_block_mode,
|
||
CoordinateSystem::Parent);
|
||
// First, compute the offset of our border box (including relative positioning)
|
||
// from our flow origin, since that is what `BaseFlow::overflow` is relative to.
|
||
let border_box_offset =
|
||
border_box.translate(&-base_flow.stacking_relative_position).origin;
|
||
// Then, using that, compute our overflow region relative to our border box.
|
||
let overflow = base_flow.overflow.paint.translate(&-border_box_offset);
|
||
|
||
// Create the filter pipeline.
|
||
let effects = self.style().get_effects();
|
||
let mut filters = effects.filter.clone();
|
||
if effects.opacity != 1.0 {
|
||
filters.push(Filter::Opacity(effects.opacity))
|
||
}
|
||
|
||
let transform_style = self.style().get_used_transform_style();
|
||
let establishes_3d_context = transform_style == transform_style::T::flat;
|
||
|
||
let context_type = match mode {
|
||
StackingContextCreationMode::PseudoFloat => StackingContextType::PseudoFloat,
|
||
StackingContextCreationMode::PseudoPositioned => StackingContextType::PseudoPositioned,
|
||
_ => StackingContextType::Real,
|
||
};
|
||
|
||
StackingContext::new(id,
|
||
context_type,
|
||
&border_box,
|
||
&overflow,
|
||
self.effective_z_index(),
|
||
filters,
|
||
self.style().get_effects().mix_blend_mode,
|
||
self.transform_matrix(&border_box),
|
||
self.perspective_matrix(&border_box),
|
||
establishes_3d_context,
|
||
scroll_policy,
|
||
parent_scroll_id)
|
||
}
|
||
|
||
fn adjust_clipping_region_for_children(&self,
|
||
current_clip: &mut ClippingRegion,
|
||
stacking_relative_border_box: &Rect<Au>) {
|
||
// Don't clip if we're text.
|
||
if self.is_scanned_text_fragment() {
|
||
return
|
||
}
|
||
|
||
let overflow_x = self.style.get_box().overflow_x;
|
||
let overflow_y = self.style.get_box().overflow_y.0;
|
||
if overflow_x == overflow_x::T::visible && overflow_y == overflow_x::T::visible {
|
||
return
|
||
}
|
||
|
||
let overflow_clip_rect_owner;
|
||
let overflow_clip_rect = match self.style.get_box()._servo_overflow_clip_box {
|
||
overflow_clip_box::T::padding_box => {
|
||
// FIXME(SimonSapin): should be the padding box, not border box.
|
||
stacking_relative_border_box
|
||
}
|
||
overflow_clip_box::T::content_box => {
|
||
overflow_clip_rect_owner =
|
||
self.stacking_relative_content_box(stacking_relative_border_box);
|
||
&overflow_clip_rect_owner
|
||
}
|
||
};
|
||
|
||
// Clip according to the values of `overflow-x` and `overflow-y`.
|
||
//
|
||
// FIXME(pcwalton): This may be more complex than it needs to be, since it seems to be
|
||
// impossible with the computed value rules as they are to have `overflow-x: visible`
|
||
// with `overflow-y: <scrolling>` or vice versa!
|
||
if let overflow_x::T::hidden = self.style.get_box().overflow_x {
|
||
let mut bounds = current_clip.bounding_rect();
|
||
let max_x = cmp::min(bounds.max_x(), overflow_clip_rect.max_x());
|
||
bounds.origin.x = cmp::max(bounds.origin.x, overflow_clip_rect.origin.x);
|
||
bounds.size.width = max_x - bounds.origin.x;
|
||
current_clip.intersect_rect(&bounds)
|
||
}
|
||
if let overflow_x::T::hidden = self.style.get_box().overflow_y.0 {
|
||
let mut bounds = current_clip.bounding_rect();
|
||
let max_y = cmp::min(bounds.max_y(), overflow_clip_rect.max_y());
|
||
bounds.origin.y = cmp::max(bounds.origin.y, overflow_clip_rect.origin.y);
|
||
bounds.size.height = max_y - bounds.origin.y;
|
||
current_clip.intersect_rect(&bounds)
|
||
}
|
||
|
||
let border_radii = build_border_radius(stacking_relative_border_box,
|
||
self.style.get_border());
|
||
if !border_radii.is_square() {
|
||
current_clip.intersect_with_rounded_rect(stacking_relative_border_box,
|
||
&border_radii)
|
||
}
|
||
}
|
||
|
||
fn build_display_list_for_text_fragment(&self,
|
||
state: &mut DisplayListBuildState,
|
||
text_fragment: &ScannedTextFragmentInfo,
|
||
stacking_relative_content_box: &Rect<Au>,
|
||
text_shadow: Option<&TextShadow>,
|
||
clip: &ClippingRegion) {
|
||
// TODO(emilio): Allow changing more properties by ::selection
|
||
let text_color = if let Some(shadow) = text_shadow {
|
||
// If we're painting a shadow, paint the text the same color as the shadow.
|
||
self.style().resolve_color(shadow.color)
|
||
} else if text_fragment.selected() {
|
||
// Otherwise, paint the text with the color as described in its styling.
|
||
self.selected_style().get_color().color
|
||
} else {
|
||
self.style().get_color().color
|
||
};
|
||
let offset = text_shadow.map(|s| Point2D::new(s.offset_x, s.offset_y)).unwrap_or_else(Point2D::zero);
|
||
let shadow_blur_radius = text_shadow.map(|s| s.blur_radius).unwrap_or(Au(0));
|
||
|
||
// Determine the orientation and cursor to use.
|
||
let (orientation, cursor) = if self.style.writing_mode.is_vertical() {
|
||
// TODO: Distinguish between 'sideways-lr' and 'sideways-rl' writing modes in CSS
|
||
// Writing Modes Level 4.
|
||
(TextOrientation::SidewaysRight, Cursor::VerticalText)
|
||
} else {
|
||
(TextOrientation::Upright, Cursor::Text)
|
||
};
|
||
|
||
// Compute location of the baseline.
|
||
//
|
||
// FIXME(pcwalton): Get the real container size.
|
||
let container_size = Size2D::zero();
|
||
let metrics = &text_fragment.run.font_metrics;
|
||
let stacking_relative_content_box = stacking_relative_content_box.translate(&offset);
|
||
let baseline_origin = stacking_relative_content_box.origin +
|
||
LogicalPoint::new(self.style.writing_mode,
|
||
Au(0),
|
||
metrics.ascent).to_physical(self.style.writing_mode,
|
||
container_size);
|
||
|
||
// Create the text display item.
|
||
let base = state.create_base_display_item(&stacking_relative_content_box,
|
||
clip,
|
||
self.node,
|
||
self.style().get_cursor(cursor),
|
||
DisplayListSection::Content);
|
||
state.add_display_item(DisplayItem::Text(box TextDisplayItem {
|
||
base: base,
|
||
text_run: text_fragment.run.clone(),
|
||
range: text_fragment.range,
|
||
text_color: text_color.to_gfx_color(),
|
||
orientation: orientation,
|
||
baseline_origin: baseline_origin,
|
||
blur_radius: shadow_blur_radius,
|
||
}));
|
||
|
||
// Create display items for text decorations.
|
||
let mut text_decorations = self.style()
|
||
.get_inheritedtext()
|
||
._servo_text_decorations_in_effect;
|
||
// Note that the text decoration colors are always the same as the text color.
|
||
text_decorations.underline = text_decorations.underline.map(|_| text_color);
|
||
text_decorations.overline = text_decorations.overline.map(|_| text_color);
|
||
text_decorations.line_through = text_decorations.line_through.map(|_| text_color);
|
||
|
||
let stacking_relative_content_box =
|
||
LogicalRect::from_physical(self.style.writing_mode,
|
||
stacking_relative_content_box,
|
||
container_size);
|
||
if let Some(ref underline_color) = text_decorations.underline {
|
||
let mut stacking_relative_box = stacking_relative_content_box;
|
||
stacking_relative_box.start.b = stacking_relative_content_box.start.b +
|
||
metrics.ascent - metrics.underline_offset;
|
||
stacking_relative_box.size.block = metrics.underline_size;
|
||
self.build_display_list_for_text_decoration(state,
|
||
underline_color,
|
||
&stacking_relative_box,
|
||
clip,
|
||
shadow_blur_radius);
|
||
}
|
||
|
||
if let Some(ref overline_color) = text_decorations.overline {
|
||
let mut stacking_relative_box = stacking_relative_content_box;
|
||
stacking_relative_box.size.block = metrics.underline_size;
|
||
self.build_display_list_for_text_decoration(state,
|
||
overline_color,
|
||
&stacking_relative_box,
|
||
clip,
|
||
shadow_blur_radius);
|
||
}
|
||
|
||
if let Some(ref line_through_color) = text_decorations.line_through {
|
||
let mut stacking_relative_box = stacking_relative_content_box;
|
||
stacking_relative_box.start.b = stacking_relative_box.start.b + metrics.ascent -
|
||
metrics.strikeout_offset;
|
||
stacking_relative_box.size.block = metrics.strikeout_size;
|
||
self.build_display_list_for_text_decoration(state,
|
||
line_through_color,
|
||
&stacking_relative_box,
|
||
clip,
|
||
shadow_blur_radius);
|
||
}
|
||
}
|
||
|
||
fn build_display_list_for_text_decoration(&self,
|
||
state: &mut DisplayListBuildState,
|
||
color: &RGBA,
|
||
stacking_relative_box: &LogicalRect<Au>,
|
||
clip: &ClippingRegion,
|
||
blur_radius: Au) {
|
||
// Perhaps surprisingly, text decorations are box shadows. This is because they may need
|
||
// to have blur in the case of `text-shadow`, and this doesn't hurt performance because box
|
||
// shadows are optimized into essentially solid colors if there is no need for the blur.
|
||
//
|
||
// FIXME(pcwalton, #2795): Get the real container size.
|
||
let container_size = Size2D::zero();
|
||
let stacking_relative_box = stacking_relative_box.to_physical(self.style.writing_mode,
|
||
container_size);
|
||
let base = state.create_base_display_item(
|
||
&shadow_bounds(&stacking_relative_box, blur_radius, Au(0)),
|
||
clip,
|
||
self.node,
|
||
self.style.get_cursor(Cursor::Default),
|
||
DisplayListSection::Content);
|
||
state.add_display_item(DisplayItem::BoxShadow(box BoxShadowDisplayItem {
|
||
base: base,
|
||
box_bounds: stacking_relative_box,
|
||
color: color.to_gfx_color(),
|
||
offset: Point2D::zero(),
|
||
blur_radius: blur_radius,
|
||
spread_radius: Au(0),
|
||
border_radius: Au(0),
|
||
clip_mode: BoxShadowClipMode::None,
|
||
}));
|
||
}
|
||
|
||
}
|
||
|
||
pub trait BlockFlowDisplayListBuilding {
|
||
fn collect_stacking_contexts_for_block(&mut self, state: &mut DisplayListBuildState);
|
||
fn setup_scroll_root_for_block(&mut self, state: &mut DisplayListBuildState) -> ScrollRootId;
|
||
fn create_pseudo_stacking_context_for_block(&mut self,
|
||
parent_stacking_context_id: StackingContextId,
|
||
parent_scroll_root_id: ScrollRootId,
|
||
state: &mut DisplayListBuildState);
|
||
fn create_real_stacking_context_for_block(&mut self,
|
||
parent_stacking_context_id: StackingContextId,
|
||
parent_scroll_root_id: ScrollRootId,
|
||
state: &mut DisplayListBuildState);
|
||
fn build_display_list_for_block(&mut self,
|
||
state: &mut DisplayListBuildState,
|
||
border_painting_mode: BorderPaintingMode);
|
||
}
|
||
|
||
impl BlockFlowDisplayListBuilding for BlockFlow {
|
||
fn collect_stacking_contexts_for_block(&mut self, state: &mut DisplayListBuildState) {
|
||
let parent_stacking_context_id = state.current_stacking_context_id;
|
||
let block_stacking_context_type = self.block_stacking_context_type();
|
||
self.base.stacking_context_id = match block_stacking_context_type {
|
||
BlockStackingContextType::NonstackingContext => state.current_stacking_context_id,
|
||
BlockStackingContextType::PseudoStackingContext |
|
||
BlockStackingContextType::StackingContext => self.fragment.stacking_context_id(),
|
||
};
|
||
state.current_stacking_context_id = self.base.stacking_context_id;
|
||
|
||
let original_scroll_root_id = state.current_scroll_root_id;
|
||
|
||
// We are getting the id of the scroll root that contains us here, not the id of
|
||
// any scroll root that we create. If we create a scroll root, its id will be
|
||
// stored in state.current_scroll_root_id. If we should create a stacking context,
|
||
// we don't want it to be clipped by its own scroll root.
|
||
let containing_scroll_root_id = self.setup_scroll_root_for_block(state);
|
||
|
||
match block_stacking_context_type {
|
||
BlockStackingContextType::NonstackingContext => {
|
||
self.base.collect_stacking_contexts_for_children(state);
|
||
}
|
||
BlockStackingContextType::PseudoStackingContext => {
|
||
self.create_pseudo_stacking_context_for_block(parent_stacking_context_id,
|
||
containing_scroll_root_id,
|
||
state);
|
||
}
|
||
BlockStackingContextType::StackingContext => {
|
||
self.create_real_stacking_context_for_block(parent_stacking_context_id,
|
||
containing_scroll_root_id,
|
||
state);
|
||
}
|
||
}
|
||
|
||
state.current_scroll_root_id = original_scroll_root_id;
|
||
state.current_stacking_context_id = parent_stacking_context_id;
|
||
}
|
||
|
||
fn setup_scroll_root_for_block(&mut self, state: &mut DisplayListBuildState) -> ScrollRootId {
|
||
let containing_scroll_root_id = state.current_scroll_root_id;
|
||
self.base.scroll_root_id = containing_scroll_root_id;
|
||
|
||
if !self.style_permits_scrolling_overflow() {
|
||
return containing_scroll_root_id;
|
||
}
|
||
|
||
let coordinate_system = if self.fragment.establishes_stacking_context() {
|
||
CoordinateSystem::Own
|
||
} else {
|
||
CoordinateSystem::Parent
|
||
};
|
||
|
||
let border_box = self.fragment.stacking_relative_border_box(
|
||
&self.base.stacking_relative_position,
|
||
&self.base.early_absolute_position_info.relative_containing_block_size,
|
||
self.base.early_absolute_position_info.relative_containing_block_mode,
|
||
coordinate_system);
|
||
let clip = self.fragment.stacking_relative_content_box(&border_box);
|
||
|
||
let has_scrolling_overflow = self.base.overflow.scroll.origin != Point2D::zero() ||
|
||
self.base.overflow.scroll.size.width > clip.size.width ||
|
||
self.base.overflow.scroll.size.height > clip.size.height;
|
||
self.mark_scrolling_overflow(has_scrolling_overflow);
|
||
if !has_scrolling_overflow {
|
||
return containing_scroll_root_id;
|
||
}
|
||
|
||
let new_scroll_root_id = ScrollRootId::new_of_type(self.fragment.node.id() as usize,
|
||
self.fragment.fragment_type());
|
||
state.add_scroll_root(
|
||
ScrollRoot {
|
||
id: new_scroll_root_id,
|
||
parent_id: containing_scroll_root_id,
|
||
clip: clip,
|
||
size: self.base.overflow.scroll.size,
|
||
},
|
||
self.base.stacking_context_id
|
||
);
|
||
|
||
self.base.scroll_root_id = new_scroll_root_id;
|
||
state.current_scroll_root_id = new_scroll_root_id;
|
||
containing_scroll_root_id
|
||
}
|
||
|
||
fn create_pseudo_stacking_context_for_block(&mut self,
|
||
parent_stacking_context_id: StackingContextId,
|
||
parent_scroll_root_id: ScrollRootId,
|
||
state: &mut DisplayListBuildState) {
|
||
let creation_mode = if self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) ||
|
||
self.fragment.style.get_box().position != position::T::static_ {
|
||
StackingContextCreationMode::PseudoPositioned
|
||
} else {
|
||
assert!(self.base.flags.is_float());
|
||
StackingContextCreationMode::PseudoFloat
|
||
};
|
||
|
||
let new_context = self.fragment.create_stacking_context(self.base.stacking_context_id,
|
||
&self.base,
|
||
ScrollPolicy::Scrollable,
|
||
creation_mode,
|
||
parent_scroll_root_id);
|
||
state.add_stacking_context(parent_stacking_context_id, new_context);
|
||
|
||
self.base.collect_stacking_contexts_for_children(state);
|
||
|
||
let children = state.stacking_context_info.get_mut(&self.base.stacking_context_id)
|
||
.map(|info| info.take_children());
|
||
if let Some(children) = children {
|
||
for child in children {
|
||
if child.context_type == StackingContextType::PseudoFloat {
|
||
state.add_stacking_context(self.base.stacking_context_id, child);
|
||
} else {
|
||
state.add_stacking_context(parent_stacking_context_id, child);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
fn create_real_stacking_context_for_block(&mut self,
|
||
parent_stacking_context_id: StackingContextId,
|
||
parent_scroll_root_id: ScrollRootId,
|
||
state: &mut DisplayListBuildState) {
|
||
let scroll_policy = if self.is_fixed() {
|
||
ScrollPolicy::Fixed
|
||
} else {
|
||
ScrollPolicy::Scrollable
|
||
};
|
||
|
||
let stacking_context = self.fragment.create_stacking_context(
|
||
self.base.stacking_context_id,
|
||
&self.base,
|
||
scroll_policy,
|
||
StackingContextCreationMode::Normal,
|
||
parent_scroll_root_id);
|
||
state.add_stacking_context(parent_stacking_context_id, stacking_context);
|
||
self.base.collect_stacking_contexts_for_children(state);
|
||
}
|
||
|
||
fn build_display_list_for_block(&mut self,
|
||
state: &mut DisplayListBuildState,
|
||
border_painting_mode: BorderPaintingMode) {
|
||
let background_border_section = if self.base.flags.is_float() {
|
||
DisplayListSection::BackgroundAndBorders
|
||
} else if self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) {
|
||
if self.fragment.establishes_stacking_context() {
|
||
DisplayListSection::BackgroundAndBorders
|
||
} else {
|
||
DisplayListSection::BlockBackgroundsAndBorders
|
||
}
|
||
} else {
|
||
DisplayListSection::BlockBackgroundsAndBorders
|
||
};
|
||
|
||
state.processing_scroll_root_element = self.has_scrolling_overflow();
|
||
|
||
// Add the box that starts the block context.
|
||
self.fragment
|
||
.build_display_list(state,
|
||
&self.base.stacking_relative_position,
|
||
&self.base
|
||
.early_absolute_position_info
|
||
.relative_containing_block_size,
|
||
self.base
|
||
.early_absolute_position_info
|
||
.relative_containing_block_mode,
|
||
border_painting_mode,
|
||
background_border_section,
|
||
&self.base.clip);
|
||
|
||
self.base.build_display_items_for_debugging_tint(state, self.fragment.node);
|
||
|
||
state.processing_scroll_root_element = false;
|
||
}
|
||
|
||
}
|
||
|
||
pub trait InlineFlowDisplayListBuilding {
|
||
fn collect_stacking_contexts_for_inline(&mut self, state: &mut DisplayListBuildState);
|
||
fn build_display_list_for_inline_fragment_at_index(&mut self,
|
||
state: &mut DisplayListBuildState,
|
||
index: usize);
|
||
fn build_display_list_for_inline(&mut self, state: &mut DisplayListBuildState);
|
||
}
|
||
|
||
impl InlineFlowDisplayListBuilding for InlineFlow {
|
||
fn collect_stacking_contexts_for_inline(&mut self, state: &mut DisplayListBuildState) {
|
||
self.base.stacking_context_id = state.current_stacking_context_id;
|
||
self.base.scroll_root_id = state.current_scroll_root_id;
|
||
|
||
for mut fragment in self.fragments.fragments.iter_mut() {
|
||
match fragment.specific {
|
||
SpecificFragmentInfo::InlineBlock(ref mut block_flow) => {
|
||
let block_flow = FlowRef::deref_mut(&mut block_flow.flow_ref);
|
||
block_flow.collect_stacking_contexts(state);
|
||
}
|
||
SpecificFragmentInfo::InlineAbsoluteHypothetical(ref mut block_flow) => {
|
||
let block_flow = FlowRef::deref_mut(&mut block_flow.flow_ref);
|
||
block_flow.collect_stacking_contexts(state);
|
||
}
|
||
_ if fragment.establishes_stacking_context() => {
|
||
fragment.stacking_context_id =
|
||
StackingContextId::new_of_type(fragment.fragment_id(),
|
||
fragment.fragment_type());
|
||
let current_stacking_context_id = state.current_stacking_context_id;
|
||
let current_scroll_root_id = state.current_scroll_root_id;
|
||
state.add_stacking_context(current_stacking_context_id,
|
||
fragment.create_stacking_context(
|
||
fragment.stacking_context_id,
|
||
&self.base,
|
||
ScrollPolicy::Scrollable,
|
||
StackingContextCreationMode::Normal,
|
||
current_scroll_root_id));
|
||
}
|
||
_ => fragment.stacking_context_id = state.current_stacking_context_id,
|
||
}
|
||
}
|
||
}
|
||
|
||
fn build_display_list_for_inline_fragment_at_index(&mut self,
|
||
state: &mut DisplayListBuildState,
|
||
index: usize) {
|
||
let fragment = self.fragments.fragments.get_mut(index).unwrap();
|
||
fragment.build_display_list(state,
|
||
&self.base.stacking_relative_position,
|
||
&self.base
|
||
.early_absolute_position_info
|
||
.relative_containing_block_size,
|
||
self.base
|
||
.early_absolute_position_info
|
||
.relative_containing_block_mode,
|
||
BorderPaintingMode::Separate,
|
||
DisplayListSection::Content,
|
||
&self.base.clip);
|
||
}
|
||
|
||
fn build_display_list_for_inline(&mut self, state: &mut DisplayListBuildState) {
|
||
// TODO(#228): Once we form lines and have their cached bounds, we can be smarter and
|
||
// not recurse on a line if nothing in it can intersect the dirty region.
|
||
debug!("Flow: building display list for {} inline fragments", self.fragments.len());
|
||
|
||
// We iterate using an index here, because we want to avoid doing a doing
|
||
// a double-borrow of self (one mutable for the method call and one immutable
|
||
// for the self.fragments.fragment iterator itself).
|
||
for index in 0..self.fragments.fragments.len() {
|
||
let (establishes_stacking_context, stacking_context_id) = {
|
||
let fragment = self.fragments.fragments.get(index).unwrap();
|
||
(self.base.stacking_context_id != fragment.stacking_context_id,
|
||
fragment.stacking_context_id)
|
||
};
|
||
|
||
let parent_stacking_context_id = state.current_stacking_context_id;
|
||
if establishes_stacking_context {
|
||
state.current_stacking_context_id = stacking_context_id;
|
||
}
|
||
|
||
self.build_display_list_for_inline_fragment_at_index(state, index);
|
||
|
||
if establishes_stacking_context {
|
||
state.current_stacking_context_id = parent_stacking_context_id
|
||
}
|
||
}
|
||
|
||
if !self.fragments.fragments.is_empty() {
|
||
self.base.build_display_items_for_debugging_tint(state,
|
||
self.fragments.fragments[0].node);
|
||
}
|
||
}
|
||
}
|
||
|
||
pub trait ListItemFlowDisplayListBuilding {
|
||
fn build_display_list_for_list_item(&mut self, state: &mut DisplayListBuildState);
|
||
}
|
||
|
||
impl ListItemFlowDisplayListBuilding for ListItemFlow {
|
||
fn build_display_list_for_list_item(&mut self, state: &mut DisplayListBuildState) {
|
||
// Draw the marker, if applicable.
|
||
for marker in &mut self.marker_fragments {
|
||
marker.build_display_list(state,
|
||
&self.block_flow.base.stacking_relative_position,
|
||
&self.block_flow
|
||
.base
|
||
.early_absolute_position_info
|
||
.relative_containing_block_size,
|
||
self.block_flow
|
||
.base
|
||
.early_absolute_position_info
|
||
.relative_containing_block_mode,
|
||
BorderPaintingMode::Separate,
|
||
DisplayListSection::Content,
|
||
&self.block_flow.base.clip);
|
||
}
|
||
|
||
// Draw the rest of the block.
|
||
self.block_flow.build_display_list_for_block(state, BorderPaintingMode::Separate)
|
||
}
|
||
}
|
||
|
||
pub trait FlexFlowDisplayListBuilding {
|
||
fn build_display_list_for_flex(&mut self, state: &mut DisplayListBuildState);
|
||
}
|
||
|
||
impl FlexFlowDisplayListBuilding for FlexFlow {
|
||
fn build_display_list_for_flex(&mut self, state: &mut DisplayListBuildState) {
|
||
// Draw the rest of the block.
|
||
self.as_mut_block().build_display_list_for_block(state, BorderPaintingMode::Separate)
|
||
}
|
||
}
|
||
|
||
trait BaseFlowDisplayListBuilding {
|
||
fn build_display_items_for_debugging_tint(&self,
|
||
state: &mut DisplayListBuildState,
|
||
node: OpaqueNode);
|
||
}
|
||
|
||
impl BaseFlowDisplayListBuilding for BaseFlow {
|
||
fn build_display_items_for_debugging_tint(&self,
|
||
state: &mut DisplayListBuildState,
|
||
node: OpaqueNode) {
|
||
if !opts::get().show_debug_parallel_layout {
|
||
return
|
||
}
|
||
|
||
let thread_id = self.thread_id;
|
||
let stacking_context_relative_bounds =
|
||
Rect::new(self.stacking_relative_position,
|
||
self.position.size.to_physical(self.writing_mode));
|
||
|
||
let mut color = THREAD_TINT_COLORS[thread_id as usize % THREAD_TINT_COLORS.len()];
|
||
color.a = 1.0;
|
||
let base = state.create_base_display_item(
|
||
&stacking_context_relative_bounds.inflate(Au::from_px(2), Au::from_px(2)),
|
||
&self.clip,
|
||
node,
|
||
None,
|
||
DisplayListSection::Content);
|
||
state.add_display_item(DisplayItem::Border(box BorderDisplayItem {
|
||
base: base,
|
||
border_widths: SideOffsets2D::new_all_same(Au::from_px(2)),
|
||
details: BorderDetails::Normal(NormalBorder {
|
||
color: SideOffsets2D::new_all_same(color),
|
||
style: SideOffsets2D::new_all_same(border_style::T::solid),
|
||
radius: BorderRadii::all_same(Au(0)),
|
||
}),
|
||
}));
|
||
}
|
||
}
|
||
|
||
trait ServoComputedValuesCursorUtility {
|
||
fn get_cursor(&self, default_cursor: Cursor) -> Option<Cursor>;
|
||
}
|
||
|
||
impl ServoComputedValuesCursorUtility for ServoComputedValues {
|
||
/// Gets the cursor to use given the specific ServoComputedValues. `default_cursor` specifies
|
||
/// the cursor to use if `cursor` is `auto`. Typically, this will be `PointerCursor`, but for
|
||
/// text display items it may be `TextCursor` or `VerticalTextCursor`.
|
||
#[inline]
|
||
fn get_cursor(&self, default_cursor: Cursor) -> Option<Cursor> {
|
||
match (self.get_pointing().pointer_events, self.get_pointing().cursor) {
|
||
(pointer_events::T::none, _) => None,
|
||
(pointer_events::T::auto, cursor::Keyword::AutoCursor) => Some(default_cursor),
|
||
(pointer_events::T::auto, cursor::Keyword::SpecifiedCursor(cursor)) => Some(cursor),
|
||
}
|
||
}
|
||
}
|
||
|
||
// A helper data structure for gradients.
|
||
#[derive(Copy, Clone)]
|
||
struct StopRun {
|
||
start_offset: f32,
|
||
end_offset: f32,
|
||
start_index: usize,
|
||
stop_count: usize,
|
||
}
|
||
|
||
fn position_to_offset(position: LengthOrPercentage, Au(total_length): Au) -> f32 {
|
||
match position {
|
||
LengthOrPercentage::Length(Au(length)) => {
|
||
(1.0f32).min(length as f32 / total_length as f32)
|
||
}
|
||
LengthOrPercentage::Percentage(percentage) => percentage as f32,
|
||
LengthOrPercentage::Calc(calc) =>
|
||
(1.0f32).min(calc.percentage() + (calc.length().0 as f32) / (total_length as f32)),
|
||
}
|
||
}
|
||
|
||
/// Adjusts `content_rect` as necessary for the given spread, and blur so that the resulting
|
||
/// bounding rect contains all of a shadow's ink.
|
||
fn shadow_bounds(content_rect: &Rect<Au>, blur_radius: Au, spread_radius: Au) -> Rect<Au> {
|
||
let inflation = spread_radius + blur_radius * BLUR_INFLATION_FACTOR;
|
||
content_rect.inflate(inflation, inflation)
|
||
}
|
||
|
||
/// Allows a CSS color to be converted into a graphics color.
|
||
pub trait ToGfxColor {
|
||
/// Converts a CSS color to a graphics color.
|
||
fn to_gfx_color(&self) -> ColorF;
|
||
}
|
||
|
||
impl ToGfxColor for RGBA {
|
||
fn to_gfx_color(&self) -> ColorF {
|
||
ColorF::new(self.red_f32(), self.green_f32(), self.blue_f32(), self.alpha_f32())
|
||
}
|
||
}
|
||
|
||
/// Describes how to paint the borders.
|
||
#[derive(Copy, Clone)]
|
||
pub enum BorderPaintingMode<'a> {
|
||
/// Paint borders separately (`border-collapse: separate`).
|
||
Separate,
|
||
/// Paint collapsed borders.
|
||
Collapse(&'a CollapsedBordersForCell),
|
||
/// Paint no borders.
|
||
Hidden,
|
||
}
|
||
|
||
#[derive(Copy, Clone, PartialEq)]
|
||
pub enum StackingContextCreationMode {
|
||
Normal,
|
||
PseudoPositioned,
|
||
PseudoFloat,
|
||
}
|
||
|