| /* |
| * (C) 1999-2003 Lars Knoll (knoll@kde.org) |
| * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2012, 2013, 2019 Apple Inc. All rights reserved. |
| * Copyright (C) 2026 Samuel Weinig <sam@webkit.org> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "config.h" |
| #include "CSSUnits.h" |
| |
| #include <wtf/text/TextStream.h> |
| |
| namespace WebCore { |
| |
| CSSUnitCategory unitCategory(CSSUnitType type) |
| { |
| switch (type) { |
| case CSSUnitType::Number: |
| case CSSUnitType::Integer: |
| return CSSUnitCategory::Number; |
| case CSSUnitType::Percentage: |
| return CSSUnitCategory::Percent; |
| // https://drafts.csswg.org/css-values-4/#absolute-lengths |
| case CSSUnitType::Px: |
| case CSSUnitType::Cm: |
| case CSSUnitType::Mm: |
| case CSSUnitType::In: |
| case CSSUnitType::Pt: |
| case CSSUnitType::Pc: |
| case CSSUnitType::Q: |
| return CSSUnitCategory::AbsoluteLength; |
| // https://drafts.csswg.org/css-values-4/#font-relative-lengths |
| case CSSUnitType::Em: |
| case CSSUnitType::Ex: |
| case CSSUnitType::Cap: |
| case CSSUnitType::Ch: |
| case CSSUnitType::Ic: |
| case CSSUnitType::Lh: |
| case CSSUnitType::Rcap: |
| case CSSUnitType::Rch: |
| case CSSUnitType::Rem: |
| case CSSUnitType::Rex: |
| case CSSUnitType::Ric: |
| case CSSUnitType::Rlh: |
| return CSSUnitCategory::FontRelativeLength; |
| // https://drafts.csswg.org/css-values-4/#viewport-relative-lengths |
| case CSSUnitType::Vw: |
| case CSSUnitType::Svw: |
| case CSSUnitType::Lvw: |
| case CSSUnitType::Dvw: |
| case CSSUnitType::Vh: |
| case CSSUnitType::Svh: |
| case CSSUnitType::Lvh: |
| case CSSUnitType::Dvh: |
| case CSSUnitType::Vi: |
| case CSSUnitType::Svi: |
| case CSSUnitType::Lvi: |
| case CSSUnitType::Dvi: |
| case CSSUnitType::Vb: |
| case CSSUnitType::Svb: |
| case CSSUnitType::Lvb: |
| case CSSUnitType::Dvb: |
| case CSSUnitType::Vmin: |
| case CSSUnitType::Lvmin: |
| case CSSUnitType::Svmin: |
| case CSSUnitType::Dvmin: |
| case CSSUnitType::Vmax: |
| case CSSUnitType::Svmax: |
| case CSSUnitType::Lvmax: |
| case CSSUnitType::Dvmax: |
| return CSSUnitCategory::ViewportPercentageLength; |
| // https://drafts.csswg.org/css-values-4/#time |
| case CSSUnitType::Ms: |
| case CSSUnitType::S: |
| return CSSUnitCategory::Time; |
| // https://drafts.csswg.org/css-values-4/#angles |
| case CSSUnitType::Deg: |
| case CSSUnitType::Rad: |
| case CSSUnitType::Grad: |
| case CSSUnitType::Turn: |
| return CSSUnitCategory::Angle; |
| // https://drafts.csswg.org/css-values-4/#frequency |
| case CSSUnitType::Hz: |
| case CSSUnitType::Khz: |
| return CSSUnitCategory::Frequency; |
| // https://drafts.csswg.org/css-values-4/#resolution |
| case CSSUnitType::Dppx: |
| case CSSUnitType::X: |
| case CSSUnitType::Dpi: |
| case CSSUnitType::Dpcm: |
| return CSSUnitCategory::Resolution; |
| case CSSUnitType::Fr: |
| return CSSUnitCategory::Flex; |
| case CSSUnitType::Cqw: |
| case CSSUnitType::Cqh: |
| case CSSUnitType::Cqi: |
| case CSSUnitType::Cqb: |
| case CSSUnitType::Cqmin: |
| case CSSUnitType::Cqmax: |
| case CSSUnitType::Calc: |
| case CSSUnitType::CalcPercentageWithAngle: |
| case CSSUnitType::CalcPercentageWithLength: |
| case CSSUnitType::QuirkyEm: |
| case CSSUnitType::Unknown: |
| return CSSUnitCategory::Other; |
| } |
| ASSERT_NOT_REACHED(); |
| return CSSUnitCategory::Other; |
| } |
| |
| CSSUnitType canonicalUnitTypeForCategory(CSSUnitCategory category) |
| { |
| switch (category) { |
| case CSSUnitCategory::Number: |
| return CSSUnitType::Number; |
| case CSSUnitCategory::AbsoluteLength: |
| return CSSUnitType::Px; |
| case CSSUnitCategory::Percent: |
| return CSSUnitType::Percentage; |
| case CSSUnitCategory::Time: |
| return CSSUnitType::S; |
| case CSSUnitCategory::Angle: |
| return CSSUnitType::Deg; |
| case CSSUnitCategory::Frequency: |
| return CSSUnitType::Hz; |
| case CSSUnitCategory::Resolution: |
| return CSSUnitType::Dppx; |
| case CSSUnitCategory::Flex: |
| return CSSUnitType::Fr; |
| case CSSUnitCategory::FontRelativeLength: |
| case CSSUnitCategory::ViewportPercentageLength: |
| case CSSUnitCategory::Other: |
| return CSSUnitType::Unknown; |
| } |
| ASSERT_NOT_REACHED(); |
| return CSSUnitType::Unknown; |
| } |
| |
| CSSUnitType canonicalUnitTypeForUnitType(CSSUnitType unitType) |
| { |
| return canonicalUnitTypeForCategory(unitCategory(unitType)); |
| } |
| |
| TextStream& operator<<(TextStream& ts, CSSUnitCategory category) |
| { |
| switch (category) { |
| case CSSUnitCategory::Number: ts << "Number"_s; break; |
| case CSSUnitCategory::Percent: ts << "Percent"_s; break; |
| case CSSUnitCategory::AbsoluteLength: ts << "AsboluteLength"_s; break; |
| case CSSUnitCategory::ViewportPercentageLength: ts << "ViewportPercentageLength"_s; break; |
| case CSSUnitCategory::FontRelativeLength: ts << "FontRelativeLength"_s; break; |
| case CSSUnitCategory::Angle: ts << "Angle"_s; break; |
| case CSSUnitCategory::Time: ts << "Time"_s; break; |
| case CSSUnitCategory::Frequency: ts << "Frequency"_s; break; |
| case CSSUnitCategory::Resolution: ts << "Resolution"_s; break; |
| case CSSUnitCategory::Flex: ts << "Flex"_s; break; |
| case CSSUnitCategory::Other: ts << "Other"_s; break; |
| } |
| return ts; |
| } |
| |
| TextStream& operator<<(TextStream& ts, CSSUnitType unitType) |
| { |
| switch (unitType) { |
| case CSSUnitType::Unknown: ts << "unknown"_s; break; |
| case CSSUnitType::Number: ts << "number"_s; break; |
| case CSSUnitType::Integer: ts << "integer"_s; break; |
| case CSSUnitType::Percentage: ts << "percentage"_s; break; |
| case CSSUnitType::Em: ts << "em"_s; break; |
| case CSSUnitType::Ex: ts << "ex"_s; break; |
| case CSSUnitType::Px: ts << "px"_s; break; |
| case CSSUnitType::Cm: ts << "cm"_s; break; |
| case CSSUnitType::Mm: ts << "mm"_s; break; |
| case CSSUnitType::In: ts << "in"_s; break; |
| case CSSUnitType::Pt: ts << "pt"_s; break; |
| case CSSUnitType::Pc: ts << "pc"_s; break; |
| case CSSUnitType::Deg: ts << "deg"_s; break; |
| case CSSUnitType::Rad: ts << "rad"_s; break; |
| case CSSUnitType::Grad: ts << "grad"_s; break; |
| case CSSUnitType::Ms: ts << "ms"_s; break; |
| case CSSUnitType::S: ts << 's'; break; |
| case CSSUnitType::Hz: ts << "hz"_s; break; |
| case CSSUnitType::Khz: ts << "khz"_s; break; |
| case CSSUnitType::Vw: ts << "vw"_s; break; |
| case CSSUnitType::Vh: ts << "vh"_s; break; |
| case CSSUnitType::Vmin: ts << "vmin"_s; break; |
| case CSSUnitType::Vmax: ts << "vmax"_s; break; |
| case CSSUnitType::Vb: ts << "vb"_s; break; |
| case CSSUnitType::Vi: ts << "vi"_s; break; |
| case CSSUnitType::Svw: ts << "svw"_s; break; |
| case CSSUnitType::Svh: ts << "svh"_s; break; |
| case CSSUnitType::Svmin: ts << "svmin"_s; break; |
| case CSSUnitType::Svmax: ts << "svmax"_s; break; |
| case CSSUnitType::Svb: ts << "svb"_s; break; |
| case CSSUnitType::Svi: ts << "svi"_s; break; |
| case CSSUnitType::Lvw: ts << "lvw"_s; break; |
| case CSSUnitType::Lvh: ts << "lvh"_s; break; |
| case CSSUnitType::Lvmin: ts << "lvmin"_s; break; |
| case CSSUnitType::Lvmax: ts << "lvmax"_s; break; |
| case CSSUnitType::Lvb: ts << "lvb"_s; break; |
| case CSSUnitType::Lvi: ts << "lvi"_s; break; |
| case CSSUnitType::Dvw: ts << "dvw"_s; break; |
| case CSSUnitType::Dvh: ts << "dvh"_s; break; |
| case CSSUnitType::Dvmin: ts << "dvmin"_s; break; |
| case CSSUnitType::Dvmax: ts << "dvmax"_s; break; |
| case CSSUnitType::Dvb: ts << "dvb"_s; break; |
| case CSSUnitType::Dvi: ts << "dvi"_s; break; |
| case CSSUnitType::Dppx: ts << "dppx"_s; break; |
| case CSSUnitType::X: ts << 'x'; break; |
| case CSSUnitType::Dpi: ts << "dpi"_s; break; |
| case CSSUnitType::Dpcm: ts << "dpcm"_s; break; |
| case CSSUnitType::Fr: ts << "fr"_s; break; |
| case CSSUnitType::Q: ts << 'q'; break; |
| case CSSUnitType::Lh: ts << "lh"_s; break; |
| case CSSUnitType::Rlh: ts << "rlh"_s; break; |
| case CSSUnitType::Cqw: ts << "cqw"_s; break; |
| case CSSUnitType::Cqh: ts << "cqh"_s; break; |
| case CSSUnitType::Cqi: ts << "cqi"_s; break; |
| case CSSUnitType::Cqb: ts << "cqb"_s; break; |
| case CSSUnitType::Cqmax: ts << "cqmax"_s; break; |
| case CSSUnitType::Cqmin: ts << "cqmin"_s; break; |
| case CSSUnitType::Turn: ts << "turn"_s; break; |
| case CSSUnitType::Rcap: ts << "rcap"_s; break; |
| case CSSUnitType::Rch: ts << "rch"_s; break; |
| case CSSUnitType::Rem: ts << "rem"_s; break; |
| case CSSUnitType::Rex: ts << "rex"_s; break; |
| case CSSUnitType::Ric: ts << "ric"_s; break; |
| case CSSUnitType::Cap: ts << "cap"_s; break; |
| case CSSUnitType::Ch: ts << "ch"_s; break; |
| case CSSUnitType::Ic: ts << "ic"_s; break; |
| case CSSUnitType::Calc: ts << "calc"_s; break; |
| case CSSUnitType::CalcPercentageWithAngle: ts << "calc_percentage_with_angle"_s; break; |
| case CSSUnitType::CalcPercentageWithLength: ts << "calc_percentage_with_length"_s; break; |
| case CSSUnitType::QuirkyEm: ts << "quirky_em"_s; break; |
| } |
| return ts; |
| } |
| |
| std::optional<double> conversionToCanonicalUnitsScaleFactor(CSSUnitType unit) |
| { |
| switch (unit) { |
| case CSSUnitType::Px: |
| case CSSUnitType::Deg: |
| case CSSUnitType::S: |
| case CSSUnitType::Hz: |
| case CSSUnitType::Dppx: |
| return 1.0; |
| case CSSUnitType::Ms: |
| return CSS::secondsPerMillisecond; |
| case CSSUnitType::Cm: |
| return CSS::pixelsPerCm; |
| case CSSUnitType::Dpcm: |
| return CSS::dppxPerDpcm; |
| case CSSUnitType::Mm: |
| return CSS::pixelsPerMm; |
| case CSSUnitType::Q: |
| return CSS::pixelsPerQ; |
| case CSSUnitType::In: |
| return CSS::pixelsPerInch; |
| case CSSUnitType::Dpi: |
| return CSS::dppxPerDpi; |
| case CSSUnitType::Pt: |
| return CSS::pixelsPerPt; |
| case CSSUnitType::Pc: |
| return CSS::pixelsPerPc; |
| case CSSUnitType::Rad: |
| return degreesPerRadianDouble; |
| case CSSUnitType::Grad: |
| return degreesPerGradientDouble; |
| case CSSUnitType::Turn: |
| return degreesPerTurnDouble; |
| case CSSUnitType::Khz: |
| return CSS::hertzPerKilohertz; |
| default: |
| return std::nullopt; |
| } |
| } |
| |
| bool conversionToCanonicalUnitRequiresConversionData(CSSUnitType unit) |
| { |
| switch (unit) { |
| case CSSUnitType::Cm: |
| case CSSUnitType::Mm: |
| case CSSUnitType::Q: |
| case CSSUnitType::In: |
| case CSSUnitType::Pt: |
| case CSSUnitType::Pc: |
| case CSSUnitType::Em: |
| case CSSUnitType::Ex: |
| case CSSUnitType::Lh: |
| case CSSUnitType::Cap: |
| case CSSUnitType::Ch: |
| case CSSUnitType::Ic: |
| case CSSUnitType::Rcap: |
| case CSSUnitType::Rch: |
| case CSSUnitType::Rem: |
| case CSSUnitType::Rex: |
| case CSSUnitType::Ric: |
| case CSSUnitType::Rlh: |
| case CSSUnitType::Vw: |
| case CSSUnitType::Vh: |
| case CSSUnitType::Vmin: |
| case CSSUnitType::Vmax: |
| case CSSUnitType::Vb: |
| case CSSUnitType::Vi: |
| case CSSUnitType::Svw: |
| case CSSUnitType::Svh: |
| case CSSUnitType::Svmin: |
| case CSSUnitType::Svmax: |
| case CSSUnitType::Svb: |
| case CSSUnitType::Svi: |
| case CSSUnitType::Lvw: |
| case CSSUnitType::Lvh: |
| case CSSUnitType::Lvmin: |
| case CSSUnitType::Lvmax: |
| case CSSUnitType::Lvb: |
| case CSSUnitType::Lvi: |
| case CSSUnitType::Dvw: |
| case CSSUnitType::Dvh: |
| case CSSUnitType::Dvmin: |
| case CSSUnitType::Dvmax: |
| case CSSUnitType::Dvb: |
| case CSSUnitType::Dvi: |
| case CSSUnitType::Cqw: |
| case CSSUnitType::Cqh: |
| case CSSUnitType::Cqi: |
| case CSSUnitType::Cqb: |
| case CSSUnitType::Cqmin: |
| case CSSUnitType::Cqmax: |
| return true; |
| |
| case CSSUnitType::Number: |
| case CSSUnitType::Integer: |
| case CSSUnitType::Percentage: |
| case CSSUnitType::Px: |
| case CSSUnitType::Deg: |
| case CSSUnitType::Rad: |
| case CSSUnitType::Grad: |
| case CSSUnitType::Turn: |
| case CSSUnitType::S: |
| case CSSUnitType::Ms: |
| case CSSUnitType::Hz: |
| case CSSUnitType::Khz: |
| case CSSUnitType::Dppx: |
| case CSSUnitType::X: |
| case CSSUnitType::Dpi: |
| case CSSUnitType::Dpcm: |
| case CSSUnitType::Fr: |
| case CSSUnitType::Calc: |
| case CSSUnitType::CalcPercentageWithAngle: |
| case CSSUnitType::CalcPercentageWithLength: |
| case CSSUnitType::QuirkyEm: |
| case CSSUnitType::Unknown: |
| break; |
| } |
| |
| return false; |
| } |
| |
| ASCIILiteral unitTypeString(CSSUnitType unitType) |
| { |
| switch (unitType) { |
| case CSSUnitType::Cap: return "cap"_s; |
| case CSSUnitType::Ch: return "ch"_s; |
| case CSSUnitType::Cm: return "cm"_s; |
| case CSSUnitType::Cqb: return "cqb"_s; |
| case CSSUnitType::Cqh: return "cqh"_s; |
| case CSSUnitType::Cqi: return "cqi"_s; |
| case CSSUnitType::Cqmax: return "cqmax"_s; |
| case CSSUnitType::Cqmin: return "cqmin"_s; |
| case CSSUnitType::Cqw: return "cqw"_s; |
| case CSSUnitType::Deg: return "deg"_s; |
| case CSSUnitType::Dpcm: return "dpcm"_s; |
| case CSSUnitType::Dpi: return "dpi"_s; |
| case CSSUnitType::Dppx: return "dppx"_s; |
| case CSSUnitType::Dvb: return "dvb"_s; |
| case CSSUnitType::Dvh: return "dvh"_s; |
| case CSSUnitType::Dvi: return "dvi"_s; |
| case CSSUnitType::Dvmax: return "dvmax"_s; |
| case CSSUnitType::Dvmin: return "dvmin"_s; |
| case CSSUnitType::Dvw: return "dvw"_s; |
| case CSSUnitType::Em: return "em"_s; |
| case CSSUnitType::Ex: return "ex"_s; |
| case CSSUnitType::Fr: return "fr"_s; |
| case CSSUnitType::Grad: return "grad"_s; |
| case CSSUnitType::Hz: return "hz"_s; |
| case CSSUnitType::Ic: return "ic"_s; |
| case CSSUnitType::In: return "in"_s; |
| case CSSUnitType::Khz: return "khz"_s; |
| case CSSUnitType::Lh: return "lh"_s; |
| case CSSUnitType::Lvb: return "lvb"_s; |
| case CSSUnitType::Lvh: return "lvh"_s; |
| case CSSUnitType::Lvi: return "lvi"_s; |
| case CSSUnitType::Lvmax: return "lvmax"_s; |
| case CSSUnitType::Lvmin: return "lvmin"_s; |
| case CSSUnitType::Lvw: return "lvw"_s; |
| case CSSUnitType::Mm: return "mm"_s; |
| case CSSUnitType::Ms: return "ms"_s; |
| case CSSUnitType::Pc: return "pc"_s; |
| case CSSUnitType::Percentage: return "%"_s; |
| case CSSUnitType::Pt: return "pt"_s; |
| case CSSUnitType::Px: return "px"_s; |
| case CSSUnitType::Q: return "q"_s; |
| case CSSUnitType::Rad: return "rad"_s; |
| case CSSUnitType::Rcap: return "rcap"_s; |
| case CSSUnitType::Rch: return "rch"_s; |
| case CSSUnitType::Rem: return "rem"_s; |
| case CSSUnitType::Rex: return "rex"_s; |
| case CSSUnitType::Ric: return "ric"_s; |
| case CSSUnitType::Rlh: return "rlh"_s; |
| case CSSUnitType::S: return "s"_s; |
| case CSSUnitType::Svb: return "svb"_s; |
| case CSSUnitType::Svh: return "svh"_s; |
| case CSSUnitType::Svi: return "svi"_s; |
| case CSSUnitType::Svmax: return "svmax"_s; |
| case CSSUnitType::Svmin: return "svmin"_s; |
| case CSSUnitType::Svw: return "svw"_s; |
| case CSSUnitType::Turn: return "turn"_s; |
| case CSSUnitType::Vb: return "vb"_s; |
| case CSSUnitType::Vh: return "vh"_s; |
| case CSSUnitType::Vi: return "vi"_s; |
| case CSSUnitType::Vmax: return "vmax"_s; |
| case CSSUnitType::Vmin: return "vmin"_s; |
| case CSSUnitType::Vw: return "vw"_s; |
| case CSSUnitType::X: return "x"_s; |
| |
| case CSSUnitType::Calc: |
| case CSSUnitType::CalcPercentageWithAngle: |
| case CSSUnitType::CalcPercentageWithLength: |
| case CSSUnitType::Integer: |
| case CSSUnitType::Number: |
| case CSSUnitType::QuirkyEm: |
| case CSSUnitType::Unknown: |
| return ""_s; |
| } |
| ASSERT_NOT_REACHED(); |
| return ""_s; |
| } |
| |
| } // namespace WebCore |
