1 files changed, 175 insertions, 0 deletions
diff --git a/vcl/source/app/IconThemeSelector.cxx b/vcl/source/app/IconThemeSelector.cxx
new file mode 100644
index 000000000..e98d63657
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+++ b/vcl/source/app/IconThemeSelector.cxx
@@ -0,0 +1,175 @@
+/* -*- 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 <comphelper/lok.hxx>
+
+#include <IconThemeSelector.hxx>
+
+#include <vcl/IconThemeInfo.hxx>
+#include <config_mpl.h>
+
+#include <algorithm>
+
+namespace vcl {
+
+/*static*/ const OUStringLiteral IconThemeSelector::FALLBACK_ICON_THEME_ID("colibre");
+
+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();
+        }
+    };
+
+bool icon_theme_is_in_installed_themes(const OUString& theme,
+        const std::vector<IconThemeInfo>& installedThemes)
+{
+    return std::any_of(installedThemes.begin(), installedThemes.end(),
+                       SameTheme(theme));
+}
+
+} // end anonymous namespace
+
+IconThemeSelector::IconThemeSelector()
+    : mUseHighContrastTheme(false)
+    , mPreferDarkIconTheme(false)
+{
+}
+
+/*static*/ OUString
+IconThemeSelector::GetIconThemeForDesktopEnvironment(const OUString& desktopEnvironment)
+{
+    if (comphelper::LibreOfficeKit::isActive())
+        return "colibre";
+
+#ifdef _WIN32
+    (void)desktopEnvironment;
+    return "colibre";
+#else
+    OUString r;
+    if ( desktopEnvironment.equalsIgnoreAsciiCase("plasma5") ||
+         desktopEnvironment.equalsIgnoreAsciiCase("lxqt") ) {
+        r = "breeze";
+    }
+    else if ( desktopEnvironment.equalsIgnoreAsciiCase("macosx") ) {
+        r = "sukapura";
+    }
+    else if ( desktopEnvironment.equalsIgnoreAsciiCase("gnome") ||
+         desktopEnvironment.equalsIgnoreAsciiCase("mate") ||
+         desktopEnvironment.equalsIgnoreAsciiCase("unity") ) {
+        r = "elementary";
+    } else
+    {
+        r = FALLBACK_ICON_THEME_ID;
+    }
+    return r;
+#endif // _WIN32
+}
+
+OUString
+IconThemeSelector::SelectIconThemeForDesktopEnvironment(
+        const std::vector<IconThemeInfo>& installedThemes,
+        const OUString& desktopEnvironment) const
+{
+    if (!mPreferredIconTheme.isEmpty()) {
+        if (icon_theme_is_in_installed_themes(mPreferredIconTheme, installedThemes)) {
+            return mPreferredIconTheme;
+        }
+        //if a dark variant is preferred, and we didn't have an exact match, then try our one and only dark theme
+        if (mPreferDarkIconTheme && icon_theme_is_in_installed_themes("breeze_dark", installedThemes)) {
+            return "breeze_dark";
+        }
+    }
+
+    OUString themeForDesktop = GetIconThemeForDesktopEnvironment(desktopEnvironment);
+    if (icon_theme_is_in_installed_themes(themeForDesktop, installedThemes)) {
+        return themeForDesktop;
+    }
+
+    return ReturnFallback(installedThemes);
+}
+
+OUString
+IconThemeSelector::SelectIconTheme(
+        const std::vector<IconThemeInfo>& installedThemes,
+        const OUString& theme) const
+{
+    if (mUseHighContrastTheme) {
+        if (icon_theme_is_in_installed_themes(IconThemeInfo::HIGH_CONTRAST_ID, installedThemes)) {
+            return IconThemeInfo::HIGH_CONTRAST_ID;
+        }
+    }
+
+    if (icon_theme_is_in_installed_themes(theme, installedThemes)) {
+        return theme;
+    }
+
+    return ReturnFallback(installedThemes);
+}
+
+void
+IconThemeSelector::SetUseHighContrastTheme(bool v)
+{
+    mUseHighContrastTheme = v;
+}
+
+void
+IconThemeSelector::SetPreferredIconTheme(const OUString& theme, bool bDarkIconTheme)
+{
+    // lower case theme name, and (tdf#120175) replace - with _
+    // see icon-themes/README
+    mPreferredIconTheme = theme.toAsciiLowerCase().replace('-','_');
+    mPreferDarkIconTheme = bDarkIconTheme;
+}
+
+bool
+IconThemeSelector::operator==(const vcl::IconThemeSelector& other) const
+{
+    if (this == &other) {
+        return true;
+    }
+    if (mPreferredIconTheme != other.mPreferredIconTheme) {
+        return false;
+    }
+    if (mPreferDarkIconTheme != other.mPreferDarkIconTheme) {
+        return false;
+    }
+    if (mUseHighContrastTheme != other.mUseHighContrastTheme) {
+        return false;
+    }
+    return true;
+}
+
+bool
+IconThemeSelector::operator!=(const vcl::IconThemeSelector& other) const
+{
+    return !(*this == other);
+}
+
+/*static*/ OUString
+IconThemeSelector::ReturnFallback(const std::vector<IconThemeInfo>& installedThemes)
+{
+    if (!installedThemes.empty()) {
+        return installedThemes.front().GetThemeId();
+    }
+    else {
+        return FALLBACK_ICON_THEME_ID;
+    }
+}
+
+} /* namespace vcl */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */