1 files changed, 180 insertions, 0 deletions
diff --git a/vcl/source/app/IconThemeInfo.cxx b/vcl/source/app/IconThemeInfo.cxx
new file mode 100644
index 0000000000..4166ae0845
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+++ b/vcl/source/app/IconThemeInfo.cxx
@@ -0,0 +1,180 @@
+/* -*- 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/IconThemeInfo.hxx>
+#include <rtl/character.hxx>
+
+#include <stdexcept>
+#include <algorithm>
+
+// constants for theme ids and display names. (The theme id for high contrast is used
+// outside of this class and hence made public in IconThemeInfo.)
+
+namespace {
+
+constexpr OUStringLiteral HELPIMG_FAKE_THEME(u"helpimg");
+
+OUString
+filename_from_url(std::u16string_view url)
+{
+    size_t slashPosition = url.rfind( '/' );
+    if (slashPosition == std::u16string_view::npos) {
+        return OUString();
+    }
+    OUString filename( url.substr( slashPosition+1 ) );
+    return filename;
+}
+
+} // end anonymous namespace
+
+namespace vcl {
+
+const sal_Unicode ICON_THEME_PACKAGE_PREFIX[] = u"images_";
+
+const sal_Unicode EXTENSION_FOR_ICON_PACKAGES[] = u".zip";
+
+IconThemeInfo::IconThemeInfo()
+{
+}
+
+IconThemeInfo::IconThemeInfo(const OUString& urlToFile)
+: mUrlToFile(urlToFile)
+{
+    OUString filename = filename_from_url(urlToFile);
+    if (filename.isEmpty()) {
+        throw std::runtime_error("invalid URL passed to IconThemeInfo()");
+    }
+
+    mThemeId = FileNameToThemeId(filename);
+    mDisplayName = ThemeIdToDisplayName(mThemeId);
+
+}
+
+/*static*/ Size
+IconThemeInfo::SizeByThemeName(std::u16string_view themeName)
+{
+   if (themeName == u"galaxy") { //kept for compiler because of unused parameter 'themeName'
+     return Size( 26, 26 );
+   }
+   else {
+     return Size( 24, 24 );
+   }
+}
+
+/*static*/ bool
+IconThemeInfo::UrlCanBeParsed(std::u16string_view url)
+{
+    OUString fname = filename_from_url(url);
+    if (fname.isEmpty()) {
+        return false;
+    }
+
+    if (!fname.startsWithIgnoreAsciiCase(ICON_THEME_PACKAGE_PREFIX)) {
+        return false;
+    }
+
+    if (!fname.endsWithIgnoreAsciiCase(EXTENSION_FOR_ICON_PACKAGES)) {
+        return false;
+    }
+
+    if (fname.indexOf(HELPIMG_FAKE_THEME) != -1 ) {
+        return false;
+    }
+
+    return true;
+}
+
+/*static*/ OUString
+IconThemeInfo::FileNameToThemeId(std::u16string_view filename)
+{
+    OUString r;
+    size_t positionOfLastDot = filename.rfind(EXTENSION_FOR_ICON_PACKAGES);
+    if (positionOfLastDot == std::u16string_view::npos) { // means index not found
+        throw std::runtime_error("IconThemeInfo::FileNameToThemeId() called with invalid filename.");
+    }
+    size_t positionOfFirstUnderscore = filename.find(ICON_THEME_PACKAGE_PREFIX);
+    if (positionOfFirstUnderscore == std::u16string_view::npos) { // means index not found. Use the whole name instead
+        throw std::runtime_error("IconThemeInfo::FileNameToThemeId() called with invalid filename.");
+    }
+    positionOfFirstUnderscore += RTL_CONSTASCII_LENGTH(ICON_THEME_PACKAGE_PREFIX);
+    r = filename.substr(positionOfFirstUnderscore, positionOfLastDot - positionOfFirstUnderscore);
+    return r;
+}
+
+/*static*/ OUString
+IconThemeInfo::ThemeIdToDisplayName(const OUString& themeId)
+{
+    if (themeId.isEmpty()) {
+        throw std::runtime_error("IconThemeInfo::ThemeIdToDisplayName() called with invalid id.");
+    }
+
+    // Strip _svg and _dark filename "extensions"
+    OUString aDisplayName = themeId;
+
+    bool bIsSvg = aDisplayName.endsWith("_svg", &aDisplayName);
+    bool bIsDark = aDisplayName.endsWith("_dark", &aDisplayName);
+    if (!bIsSvg && bIsDark)
+        bIsSvg = aDisplayName.endsWith("_svg", &aDisplayName);
+
+    // make the first letter uppercase
+    sal_Unicode firstLetter = aDisplayName[0];
+    if (rtl::isAsciiLowerCase(firstLetter))
+    {
+        aDisplayName = OUStringChar(sal_Unicode(rtl::toAsciiUpperCase(firstLetter))) + aDisplayName.subView(1);
+    }
+
+    // replacing underscores with spaces of multi words pack name.
+    aDisplayName = aDisplayName.replace('_', ' ');
+
+    if (bIsSvg && bIsDark)
+        aDisplayName += " (SVG + dark)";
+    else if (bIsSvg)
+        aDisplayName += " (SVG)";
+    else if (bIsDark)
+        aDisplayName += " (dark)";
+
+    return aDisplayName;
+}
+
+namespace
+{
+    class SameTheme
+    {
+    private:
+        const OUString& m_rThemeId;
+    public:
+        explicit SameTheme(const OUString &rThemeId) : m_rThemeId(rThemeId) {}
+        bool operator()(const vcl::IconThemeInfo &rInfo)
+        {
+            return m_rThemeId == rInfo.GetThemeId();
+        }
+    };
+}
+
+/*static*/ const vcl::IconThemeInfo&
+IconThemeInfo::FindIconThemeById(const std::vector<vcl::IconThemeInfo>& themes, const OUString& themeId)
+{
+    std::vector<vcl::IconThemeInfo>::const_iterator it = std::find_if(themes.begin(), themes.end(),
+               SameTheme(themeId));
+    if (it == themes.end())
+    {
+        throw std::runtime_error("Could not find theme id in theme vector.");
+    }
+    return *it;
+}
+
+/*static*/ bool
+IconThemeInfo::IconThemeIsInVector(const std::vector<vcl::IconThemeInfo>& themes, const OUString& themeId)
+{
+    return std::any_of(themes.begin(), themes.end(), SameTheme(themeId));
+}
+
+} // end namespace vcl
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */