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LibWeb+WebContent: Forbid access to underlying type of CSSPixels

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Although DistinctNumeric, which is supposed to abstract the underlying
type, was used to represent CSSPixels, we have a whole bunch of places
in the layout code that assume CSSPixels::value() returns a
floating-point type. This assumption makes it difficult to replace the
underlying type in CSSPixels with a non-floating type.

To make it easier to transition CSSPixels to fixed-point math, one step
we can take is to prevent access to the underlying type using value()
and instead use explicit conversions with the to_float(), to_double(),
and to_int() methods.
This commit is contained in:
Aliaksandr Kalenik 2023-06-12 21:37:35 +03:00 • committed by Andreas Kling
parent 5a54c686a7
commit 147c3b3d97
43 changed files with 340 additions and 220 deletions
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12
Userland/Libraries/LibWeb/Layout/LayoutState.cpp
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@ -108,10 +108,10 @@ void LayoutState::commit()
auto& node = const_cast<NodeWithStyleAndBoxModelMetrics&>(used_values.node());
// Transfer box model metrics.
node.box_model().inset = { used_values.inset_top.value(), used_values.inset_right.value(), used_values.inset_bottom.value(), used_values.inset_left.value() };
node.box_model().padding = { used_values.padding_top.value(), used_values.padding_right.value(), used_values.padding_bottom.value(), used_values.padding_left.value() };
node.box_model().border = { used_values.border_top.value(), used_values.border_right.value(), used_values.border_bottom.value(), used_values.border_left.value() };
node.box_model().margin = { used_values.margin_top.value(), used_values.margin_right.value(), used_values.margin_bottom.value(), used_values.margin_left.value() };
node.box_model().inset = { used_values.inset_top, used_values.inset_right, used_values.inset_bottom, used_values.inset_left };
node.box_model().padding = { used_values.padding_top, used_values.padding_right, used_values.padding_bottom, used_values.padding_left };
node.box_model().border = { used_values.border_top, used_values.border_right, used_values.border_bottom, used_values.border_left };
node.box_model().margin = { used_values.margin_top, used_values.margin_right, used_values.margin_bottom, used_values.margin_left };
node.set_paintable(node.create_paintable());
@ -297,7 +297,7 @@ void LayoutState::UsedValues::set_node(NodeWithStyleAndBoxModelMetrics& node, Us
void LayoutState::UsedValues::set_content_width(CSSPixels width)
{
VERIFY(isfinite(width.value()));
VERIFY(isfinite(width.to_double()));
if (width < 0) {
// Negative widths are not allowed in CSS. We have a bug somewhere! Clamp to 0 to avoid doing too much damage.
dbgln_if(LIBWEB_CSS_DEBUG, "FIXME: Layout calculated a negative width for {}: {}", m_node->debug_description(), width);
@ -309,7 +309,7 @@ void LayoutState::UsedValues::set_content_width(CSSPixels width)
void LayoutState::UsedValues::set_content_height(CSSPixels height)
{
VERIFY(isfinite(height.value()));
VERIFY(isfinite(height.to_double()));
if (height < 0) {
// Negative heights are not allowed in CSS. We have a bug somewhere! Clamp to 0 to avoid doing too much damage.
dbgln_if(LIBWEB_CSS_DEBUG, "FIXME: Layout calculated a negative height for {}: {}", m_node->debug_description(), height);