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layout: Implement 2D CSS transforms per CSS-TRANSFORMS § 5, 6, 7, and 8.

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Patrick Walton 2014-12-31 14:08:08 -05:00
parent 7bd6cb0091
commit d10627a2b3
14 changed files with 964 additions and 35 deletions
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39
components/layout/model.rs
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@ -8,13 +8,15 @@
use fragment::Fragment;
use geom::SideOffsets2D;
use style::values::computed::{LengthOrPercentageOrAuto, LengthOrPercentageOrNone, LengthOrPercentage};
use style::properties::ComputedValues;
use util::geometry::Au;
use util::logical_geometry::LogicalMargin;
use geom::{Matrix2D, SideOffsets2D, Size2D};
use std::cmp::{max, min};
use std::fmt;
use style::computed_values::transform::ComputedMatrix;
use style::properties::ComputedValues;
use style::values::computed::{LengthAndPercentage, LengthOrPercentageOrAuto};
use style::values::computed::{LengthOrPercentageOrNone, LengthOrPercentage};
use util::geometry::Au;
use util::logical_geometry::LogicalMargin;
/// A collapsible margin. See CSS 2.1 § 8.3.1.
#[derive(Copy)]
@ -390,3 +392,30 @@ pub fn padding_from_style(style: &ComputedValues, containing_block_inline_size:
specified(padding_style.padding_bottom, containing_block_inline_size),
specified(padding_style.padding_left, containing_block_inline_size)))
}
pub trait ToGfxMatrix {
fn to_gfx_matrix(&self, containing_size: &Size2D<Au>) -> Matrix2D<f32>;
}
impl ToGfxMatrix for ComputedMatrix {
fn to_gfx_matrix(&self, containing_size: &Size2D<Au>) -> Matrix2D<f32> {
Matrix2D::new(self.m11 as f32,
self.m12 as f32,
self.m21 as f32,
self.m22 as f32,
self.m31.to_au(containing_size.width).to_subpx() as f32,
self.m32.to_au(containing_size.height).to_subpx() as f32)
}
}
trait ToAu {
fn to_au(&self, containing_size: Au) -> Au;
}
impl ToAu for LengthAndPercentage {
#[inline]
fn to_au(&self, containing_size: Au) -> Au {
self.length + Au::from_frac_px(self.percentage * containing_size.to_subpx())
}
}