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LibWeb: Add CSSPixels::nearest_value_for(FloatingPoint)

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This is intended to annotate conversions from unknown floating-point
values to CSSPixels, and make it more obvious the fp value will be
rounded to the nearest fixed-point value.
This commit is contained in:
MacDue 2023-08-26 15:57:31 +01:00 • committed by Alexander Kalenik
parent 360c0eb509
commit 71baa8c31a
28 changed files with 120 additions and 112 deletions
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22
Userland/Libraries/LibWeb/Layout/TableFormattingContext.cpp
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@ -265,11 +265,11 @@ void TableFormattingContext::compute_intrinsic_percentage(size_t max_cell_span)
auto cell_start_rc_index = cell_index<RowOrColumn>(cell);
auto cell_end_rc_index = cell_start_rc_index + cell_span_value;
// 1. Start with the percentage contribution of the cell.
CSSPixels cell_contribution = CSSPixels(cell_percentage_contribution<RowOrColumn>(cell));
CSSPixels cell_contribution = CSSPixels::nearest_value_for(cell_percentage_contribution<RowOrColumn>(cell));
// 2. Subtract the intrinsic percentage width of the column based on cells of span up to N-1 of all columns
// that the cell spans. If this gives a negative result, change it to 0%.
for (auto rc_index = cell_start_rc_index; rc_index < cell_end_rc_index; rc_index++) {
cell_contribution -= CSSPixels(rows_or_columns[rc_index].intrinsic_percentage);
cell_contribution -= CSSPixels::nearest_value_for(rows_or_columns[rc_index].intrinsic_percentage);
cell_contribution = max(cell_contribution, 0);
}
// Compute the sum of the non-spanning max-content sizes of all rows / columns spanned by the cell that have an intrinsic percentage
@ -380,12 +380,12 @@ void TableFormattingContext::compute_table_measures()
auto clamped_diff_to_baseline_min = min(
max(cell_min_size<RowOrColumn>(cell) - baseline_min_content_size - baseline_border_spacing, 0),
baseline_max_content_size - baseline_min_content_size);
cell_min_contribution += CSSPixels(normalized_max_min_diff * clamped_diff_to_baseline_min);
cell_min_contribution += CSSPixels::nearest_value_for(normalized_max_min_diff * clamped_diff_to_baseline_min);
// the product of:
// - the ratio of the max-content size based on cells of span up to N-1 of the column to the baseline max-content size
// - the outer min-content size of the cell minus the baseline max-content size and baseline border spacing, or 0 if this is negative
if (baseline_max_content_size != 0) {
cell_min_contribution += CSSPixels(rows_or_columns[rc_index].max_size / static_cast<double>(baseline_max_content_size))
cell_min_contribution += CSSPixels::nearest_value_for(rows_or_columns[rc_index].max_size / static_cast<double>(baseline_max_content_size))
* max(CSSPixels(0), cell_min_size<RowOrColumn>(cell) - baseline_max_content_size - baseline_border_spacing);
}
@ -396,7 +396,7 @@ void TableFormattingContext::compute_table_measures()
// - the ratio of the max-content size based on cells of span up to N-1 of the column to the baseline max-content size
// - the outer max-content size of the cell minus the baseline max-content size and the baseline border spacing, or 0 if this is negative
if (baseline_max_content_size != 0) {
cell_max_contribution += CSSPixels(rows_or_columns[rc_index].max_size / static_cast<double>(baseline_max_content_size))
cell_max_contribution += CSSPixels::nearest_value_for(rows_or_columns[rc_index].max_size / static_cast<double>(baseline_max_content_size))
* max(CSSPixels(0), cell_max_size<RowOrColumn>(cell) - baseline_max_content_size - baseline_border_spacing);
}
cell_min_contributions_by_rc_index[rc_index].append(cell_min_contribution);
@ -496,7 +496,7 @@ void TableFormattingContext::compute_table_width()
for (auto& cell : m_cells) {
auto const& cell_width = cell.box->computed_values().width();
if (cell_width.is_percentage()) {
adjusted_used_width = CSSPixels(ceil(100 / cell_width.percentage().value() * cell.outer_max_width.to_double()));
adjusted_used_width = CSSPixels::nearest_value_for(ceil(100 / cell_width.percentage().value() * cell.outer_max_width.to_double()));
if (width_of_table_containing_block.is_definite())
used_width = min(max(used_width, adjusted_used_width), width_of_table_containing_block.to_px_or_zero());
else
@ -555,7 +555,7 @@ void TableFormattingContext::assign_columns_width_linear_combination(Vector<CSSP
auto candidate_weight = (available_width - columns_total_used_width) / static_cast<double>(columns_total_candidate_width - columns_total_used_width);
for (size_t i = 0; i < m_columns.size(); ++i) {
auto& column = m_columns[i];
column.used_width = CSSPixels(candidate_weight * candidate_widths[i] + (1 - candidate_weight) * column.used_width);
column.used_width = CSSPixels::nearest_value_for(candidate_weight * candidate_widths[i] + (1 - candidate_weight) * column.used_width);
}
}
@ -576,7 +576,7 @@ bool TableFormattingContext::distribute_excess_width_proportionally_to_base_widt
VERIFY(total_base_width > 0);
for (auto& column : m_columns) {
if (column_filter(column)) {
column.used_width += CSSPixels(excess_width * base_width_getter(column) / static_cast<double>(total_base_width));
column.used_width += CSSPixels::nearest_value_for(excess_width * base_width_getter(column) / static_cast<double>(total_base_width));
}
}
return true;
@ -618,7 +618,7 @@ bool TableFormattingContext::distribute_excess_width_by_intrinsic_percentage(CSS
}
for (auto& column : m_columns) {
if (column_filter(column)) {
column.used_width += CSSPixels(excess_width * column.intrinsic_percentage / total_percentage_width);
column.used_width += CSSPixels::nearest_value_for(excess_width * column.intrinsic_percentage / total_percentage_width);
}
}
return true;
@ -660,7 +660,7 @@ void TableFormattingContext::distribute_width_to_columns()
for (size_t i = 0; i < m_columns.size(); ++i) {
auto& column = m_columns[i];
if (column.has_intrinsic_percentage) {
candidate_widths[i] = max(column.min_size, CSSPixels(column.intrinsic_percentage / 100 * available_width));
candidate_widths[i] = max(column.min_size, CSSPixels::nearest_value_for(column.intrinsic_percentage / 100 * available_width));
}
}
@ -990,7 +990,7 @@ void TableFormattingContext::distribute_height_to_rows()
for (auto& row : m_rows) {
auto weight = row.reference_height / static_cast<double>(sum_reference_height);
auto final_height = m_table_height * weight;
row.final_height = CSSPixels(final_height);
row.final_height = CSSPixels::nearest_value_for(final_height);
}
} else if (rows_with_auto_height.size() > 0) {
// Else, if the table owns any “auto-height” row (a row whose size is only determined by its content size and