vcl: parser of font features included in the font name

Change-Id: I7347410b4eb5e940d94c34aac4fdf344869541fa
Reviewed-on: https://gerrit.libreoffice.org/55893
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

1 files changed, 74 insertions, 0 deletions

diff --git a/vcl/source/font/FeatureParser.cxx b/vcl/source/font/FeatureParser.cxx
new file mode 100644
index 000000000000..d61c0a89cfd6
--- /dev/null
+++ b/vcl/source/font/FeatureParser.cxx
@@ -0,0 +1,74 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * 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 <vcl/font/FeatureParser.hxx>
+
+namespace vcl
+{
+namespace font
+{
+OUString trimFontNameFeatures(OUString const& rFontName)
+{
+    OUString sResultName(rFontName);
+
+    if (sResultName.indexOf(vcl::font::FeaturePrefix) < 0)
+        return sResultName;
+
+    return sResultName.getToken(0, vcl::font::FeaturePrefix);
+}
+
+FeatureParser::FeatureParser(OUString const& rFontName)
+{
+    if (rFontName.indexOf(vcl::font::FeaturePrefix) < 0)
+        return;
+
+    OUString sName = rFontName.getToken(1, vcl::font::FeaturePrefix);
+    sal_Int32 nIndex = 0;
+    do
+    {
+        OUString sToken = sName.getToken(0, vcl::font::FeatureSeparator, nIndex);
+
+        OUString sID = sToken.getToken(0, '=');
+        OUString sValue = sToken.getToken(1, '=');
+
+        if (sID.getLength() == 4 && sValue != "0")
+        {
+            if (sID == "lang")
+            {
+                m_sLanguage = sValue;
+            }
+            else
+            {
+                OString sFeatureCodeAscii = OUStringToOString(sID, RTL_TEXTENCODING_ASCII_US);
+                sal_uInt32 nCode = vcl::font::featureCode(sFeatureCodeAscii.getStr());
+                sal_uInt32 nValue = sValue.isEmpty() ? 1 : sValue.toUInt32();
+
+                if (nValue != 0)
+                    m_aFeatures.emplace_back(nCode, nValue);
+            }
+        }
+    } while (nIndex >= 0);
+}
+
+std::unordered_map<sal_uInt32, sal_uInt32> FeatureParser::getFeaturesMap()
+{
+    std::unordered_map<sal_uInt32, sal_uInt32> aResultMap;
+    for (auto const& rPair : m_aFeatures)
+    {
+        aResultMap.emplace(rPair);
+    }
+    return aResultMap;
+}
+
+} // end font namespace
+
+} // end vcl namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */