Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 165 insertions, 0 deletions

diff --git a/starmath/source/mathml/mathmlattr.cxx b/starmath/source/mathml/mathmlattr.cxx
new file mode 100644
index 000000000..5e54f0d92
--- /dev/null
+++ b/starmath/source/mathml/mathmlattr.cxx
@@ -0,0 +1,165 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * 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/.
+ */
+
+#include <mathmlattr.hxx>
+
+#include <o3tl/safeint.hxx>
+#include <o3tl/string_view.hxx>
+#include <rtl/math.h>
+
+#include <cstddef>
+#include <string_view>
+#include <unordered_map>
+
+static std::size_t ParseMathMLUnsignedNumber(std::u16string_view rStr, Fraction& rUN)
+{
+    auto nLen = rStr.length();
+    std::size_t nDecimalPoint = std::u16string_view::npos;
+    std::size_t nIdx;
+    sal_Int64 nom = 0;
+    sal_Int64 den = 1;
+    bool validNomDen = true;
+    for (nIdx = 0; nIdx < nLen; nIdx++)
+    {
+        auto cD = rStr[nIdx];
+        if (cD == u'.')
+        {
+            if (nDecimalPoint != std::u16string_view::npos)
+                return std::u16string_view::npos;
+            nDecimalPoint = nIdx;
+            continue;
+        }
+        if (cD < u'0' || u'9' < cD)
+            break;
+        if (validNomDen
+            && (o3tl::checked_multiply(nom, sal_Int64(10), nom)
+                || o3tl::checked_add(nom, sal_Int64(cD - u'0'), nom)
+                || nom >= std::numeric_limits<sal_Int32>::max()
+                || (nDecimalPoint != std::u16string_view::npos
+                    && o3tl::checked_multiply(den, sal_Int64(10), den))))
+        {
+            validNomDen = false;
+        }
+    }
+    if (nIdx == 0 || (nIdx == 1 && nDecimalPoint == 0))
+        return std::u16string_view::npos;
+
+    // If the input "xx.yyy" can be represented with nom = xx*10^n + yyy and den = 10^n in sal_Int64
+    // (where n is the length of "yyy"), then use that to create an accurate Fraction (and TODO: we
+    // could even ignore trailing "0" characters in "yyy", for a smaller n and thus a greater chance
+    // of validNomDen); if not, use the less accurate approach of creating a Fraction from double:
+    if (validNomDen)
+    {
+        rUN = Fraction(nom, den);
+    }
+    else
+    {
+        rUN = Fraction(
+            rtl_math_uStringToDouble(rStr.data(), rStr.data() + nIdx, '.', 0, nullptr, nullptr));
+    }
+
+    return nIdx;
+}
+
+static std::size_t ParseMathMLNumber(std::u16string_view rStr, Fraction& rN)
+{
+    if (rStr.empty())
+        return std::u16string_view::npos;
+    bool bNegative = (rStr[0] == '-');
+    std::size_t nOffset = bNegative ? 1 : 0;
+    auto nIdx = ParseMathMLUnsignedNumber(rStr.substr(nOffset), rN);
+    if (nIdx == std::u16string_view::npos || !rN.IsValid())
+        return std::u16string_view::npos;
+    if (bNegative)
+        rN *= -1;
+    return nOffset + nIdx;
+}
+
+bool ParseMathMLAttributeLengthValue(std::u16string_view rStr, MathMLAttributeLengthValue& rV)
+{
+    auto nIdx = ParseMathMLNumber(rStr, rV.aNumber);
+    if (nIdx == std::u16string_view::npos)
+        return false;
+    std::u16string_view sRest = rStr.substr(nIdx);
+    if (sRest.empty())
+    {
+        rV.eUnit = MathMLLengthUnit::None;
+    }
+    if (o3tl::starts_with(sRest, u"em"))
+    {
+        rV.eUnit = MathMLLengthUnit::Em;
+    }
+    if (o3tl::starts_with(sRest, u"ex"))
+    {
+        rV.eUnit = MathMLLengthUnit::Ex;
+    }
+    if (o3tl::starts_with(sRest, u"px"))
+    {
+        rV.eUnit = MathMLLengthUnit::Px;
+    }
+    if (o3tl::starts_with(sRest, u"in"))
+    {
+        rV.eUnit = MathMLLengthUnit::In;
+    }
+    if (o3tl::starts_with(sRest, u"cm"))
+    {
+        rV.eUnit = MathMLLengthUnit::Cm;
+    }
+    if (o3tl::starts_with(sRest, u"mm"))
+    {
+        rV.eUnit = MathMLLengthUnit::Mm;
+    }
+    if (o3tl::starts_with(sRest, u"pt"))
+    {
+        rV.eUnit = MathMLLengthUnit::Pt;
+    }
+    if (o3tl::starts_with(sRest, u"pc"))
+    {
+        rV.eUnit = MathMLLengthUnit::Pc;
+    }
+    if (sRest[0] == u'%')
+    {
+        rV.eUnit = MathMLLengthUnit::Percent;
+    }
+    return true;
+}
+
+bool GetMathMLMathvariantValue(const OUString& rStr, MathMLMathvariantValue& rV)
+{
+    static const std::unordered_map<OUString, MathMLMathvariantValue> aMap{
+        { "normal", MathMLMathvariantValue::Normal },
+        { "bold", MathMLMathvariantValue::Bold },
+        { "italic", MathMLMathvariantValue::Italic },
+        { "bold-italic", MathMLMathvariantValue::BoldItalic },
+        { "double-struck", MathMLMathvariantValue::DoubleStruck },
+        { "bold-fraktur", MathMLMathvariantValue::BoldFraktur },
+        { "script", MathMLMathvariantValue::Script },
+        { "bold-script", MathMLMathvariantValue::BoldScript },
+        { "fraktur", MathMLMathvariantValue::Fraktur },
+        { "sans-serif", MathMLMathvariantValue::SansSerif },
+        { "bold-sans-serif", MathMLMathvariantValue::BoldSansSerif },
+        { "sans-serif-italic", MathMLMathvariantValue::SansSerifItalic },
+        { "sans-serif-bold-italic", MathMLMathvariantValue::SansSerifBoldItalic },
+        { "monospace", MathMLMathvariantValue::Monospace },
+        { "initial", MathMLMathvariantValue::Initial },
+        { "tailed", MathMLMathvariantValue::Tailed },
+        { "looped", MathMLMathvariantValue::Looped },
+        { "stretched", MathMLMathvariantValue::Stretched }
+    };
+
+    auto it = aMap.find(rStr);
+    if (it != aMap.end())
+    {
+        rV = it->second;
+        return true;
+    }
+    return false;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */