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LibWeb: Remove implicit conversion from float and double to CSSPixels
In general it is not safe to convert any arbitrary floating-point value to CSSPixels. CSSPixels has a resolution of 0.015625, which for small values (e.g. scale factors between 0 and 1), can produce bad results if converted to CSSPixels then scaled back up. In the worst case values can underflow to zero and produce incorrect results.
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43 changed files with 248 additions and 221 deletions
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@ -405,7 +405,7 @@ CSSPixels FormattingContext::tentative_width_for_replaced_element(Box const& box
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// (used height) * (intrinsic ratio)
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if ((computed_height.is_auto() && computed_width.is_auto() && !box.has_natural_width() && box.has_natural_height() && box.has_preferred_aspect_ratio())
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|| (computed_width.is_auto() && !computed_height.is_auto() && box.has_preferred_aspect_ratio())) {
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return compute_height_for_replaced_element(box, available_space) * static_cast<double>(box.preferred_aspect_ratio().value());
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return compute_height_for_replaced_element(box, available_space).scaled(static_cast<double>(box.preferred_aspect_ratio().value()));
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}
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// If 'height' and 'width' both have computed values of 'auto' and the element has an intrinsic ratio but no intrinsic height or width,
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@ -500,7 +500,7 @@ CSSPixels FormattingContext::tentative_height_for_replaced_element(Box const& bo
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//
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// (used width) / (intrinsic ratio)
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if (computed_height.is_auto() && box.has_preferred_aspect_ratio())
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return m_state.get(box).content_width() / static_cast<double>(box.preferred_aspect_ratio().value());
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return CSSPixels(m_state.get(box).content_width() / static_cast<double>(box.preferred_aspect_ratio().value()));
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// Otherwise, if 'height' has a computed value of 'auto', and the element has an intrinsic height, then that intrinsic height is the used value of 'height'.
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if (computed_height.is_auto() && box.has_natural_height())
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@ -1051,8 +1051,8 @@ CSSPixelPoint FormattingContext::calculate_static_position(Box const& box) const
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// The purpose of this function is to calculate the approximate position that `box`
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// would have had if it were position:static.
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CSSPixels x = 0.0f;
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CSSPixels y = 0.0f;
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CSSPixels x = 0;
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CSSPixels y = 0;
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VERIFY(box.parent());
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if (box.parent()->children_are_inline()) {
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@ -1403,7 +1403,7 @@ CSSPixels FormattingContext::calculate_min_content_height(Layout::Box const& box
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CSSPixels FormattingContext::calculate_max_content_height(Layout::Box const& box, CSSPixels width) const
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{
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if (box.has_preferred_aspect_ratio())
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return width / static_cast<double>(*box.preferred_aspect_ratio());
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return CSSPixels(width / static_cast<double>(*box.preferred_aspect_ratio()));
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if (box.has_natural_height())
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return *box.natural_height();
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@ -1711,10 +1711,10 @@ CSSPixels FormattingContext::box_baseline(Box const& box) const
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return box_state.content_height() + box_state.margin_box_top();
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case CSS::VerticalAlign::TextTop:
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// TextTop: Align the top of the box with the top of the parent's content area (see 10.6.1).
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return box.computed_values().font_size();
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return CSSPixels(box.computed_values().font_size());
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case CSS::VerticalAlign::TextBottom:
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// TextTop: Align the bottom of the box with the bottom of the parent's content area (see 10.6.1).
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return box_state.content_height() - (box.containing_block()->font().pixel_metrics().descent * 2);
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return box_state.content_height() - CSSPixels(box.containing_block()->font().pixel_metrics().descent * 2);
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default:
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break;
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}
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