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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /layout/generic/ColumnUtils.cpp | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | layout/generic/ColumnUtils.cpp | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/layout/generic/ColumnUtils.cpp b/layout/generic/ColumnUtils.cpp new file mode 100644 index 0000000000..6f1f54824f --- /dev/null +++ b/layout/generic/ColumnUtils.cpp @@ -0,0 +1,47 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* A namespace class for static muti-column utilities. */ + +#include "mozilla/ColumnUtils.h" + +#include <algorithm> + +#include "nsContainerFrame.h" +#include "nsLayoutUtils.h" + +namespace mozilla { + +/* static */ +nscoord ColumnUtils::GetColumnGap(const nsContainerFrame* aFrame, + nscoord aPercentageBasis) { + const auto& columnGap = aFrame->StylePosition()->mColumnGap; + if (columnGap.IsNormal()) { + return aFrame->StyleFont()->mFont.size.ToAppUnits(); + } + return nsLayoutUtils::ResolveGapToLength(columnGap, aPercentageBasis); +} + +/* static */ +nscoord ColumnUtils::ClampUsedColumnWidth(const Length& aColumnWidth) { + // Per spec, used values will be clamped to a minimum of 1px. + return std::max(CSSPixel::ToAppUnits(1), aColumnWidth.ToAppUnits()); +} + +/* static */ +nscoord ColumnUtils::IntrinsicISize(uint32_t aColCount, nscoord aColGap, + nscoord aColISize) { + MOZ_ASSERT(aColCount > 0, "Cannot compute with zero columns!"); + + // Column box's inline-size times number of columns (n), plus n-1 column gaps. + nscoord iSize = aColISize * aColCount + aColGap * (aColCount - 1); + + // The multiplication above can make 'iSize' negative (integer overflow), + // so use std::max to protect against that. + return std::max(iSize, aColISize); +} + +} // namespace mozilla |