Bug #63962 Dynamically scan the config directory for icon themes

The hard-coded icon themes have been replaced by a dynamic list
which is filled by scanning the config directory

Conflicts:
	include/vcl/settings.hxx
	vcl/source/app/settings.cxx
	vcl/source/window/window.cxx

Change-Id: Ie3680ffe27d06e375acf22753e036cb6ddabc4ed
Reviewed-on: https://gerrit.libreoffice.org/7935
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

19 files changed, 1089 insertions, 234 deletions

diff --git a/vcl/CppunitTest_vcl_app_test.mk b/vcl/CppunitTest_vcl_app_test.mk
new file mode 100644
index 000000000000..0aa3202abe32
--- /dev/null
+++ b/vcl/CppunitTest_vcl_app_test.mk
@@ -0,0 +1,30 @@
+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
+#
+# 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/.
+#
+
+$(eval $(call gb_CppunitTest_CppunitTest,vcl_app_test))
+
+$(eval $(call gb_CppunitTest_add_exception_objects,vcl_app_test, \
+    vcl/qa/cppunit/app/test_IconThemeInfo \
+    vcl/qa/cppunit/app/test_IconThemeScanner \
+    vcl/qa/cppunit/app/test_IconThemeSelector \
+))
+
+# add a list of all needed libraries here
+$(eval $(call gb_CppunitTest_use_libraries,vcl_app_test, \
+sal \
+vcl \
+$(gb_STDLIBS) \
+))
+
+$(eval $(call gb_CppunitTest_set_include,vcl_app_test, \
+$$(INCLUDE) \
+-I$(OUTDIR)/inc \
+ ))
+
+# vim: set noet sw=4 ts=4:
diff --git a/vcl/Library_vcl.mk b/vcl/Library_vcl.mk
index 17258235a8e1..ff915330308f 100644
--- a/vcl/Library_vcl.mk
+++ b/vcl/Library_vcl.mk
@@ -112,6 +112,9 @@ $(eval $(call gb_Library_add_exception_objects,vcl,\
     vcl/source/app/salvtables \
     vcl/source/app/session \
     vcl/source/app/settings \
+    vcl/source/app/IconThemeInfo \
+    vcl/source/app/IconThemeScanner \
+    vcl/source/app/IconThemeSelector \
     vcl/source/app/solarmutex \
     vcl/source/app/sound \
     vcl/source/app/stdtext \
diff --git a/vcl/Module_vcl.mk b/vcl/Module_vcl.mk
index 4dc64347ae63..1f3c8e2bde59 100644
--- a/vcl/Module_vcl.mk
+++ b/vcl/Module_vcl.mk
@@ -88,6 +88,7 @@ endif
 $(eval $(call gb_Module_add_check_targets,vcl,\
 	CppunitTest_vcl_complextext \
 	CppunitTest_vcl_filters_test \
+	CppunitTest_vcl_app_test \
 ))
 
 # vim: set noet sw=4 ts=4:
diff --git a/vcl/inc/toolbox.h b/vcl/inc/toolbox.h
index bfffe7bcffd6..cf89d02d9759 100644
--- a/vcl/inc/toolbox.h
+++ b/vcl/inc/toolbox.h
@@ -34,13 +34,6 @@
 #define TB_MENUBUTTON_SIZE      12
 #define TB_MENUBUTTON_OFFSET    2
 
-#define TB_SMALLIMAGESIZE       16
-
-#define TB_LARGEIMAGESIZE            26
-#define TB_LARGEIMAGESIZE_INDUSTRIAL 24
-#define TB_LARGEIMAGESIZE_CRYSTAL    22
-#define TB_LARGEIMAGESIZE_OXYGEN     22
-
 class Window;
 
 struct ImplToolItem
diff --git a/vcl/qa/cppunit/app/test_IconThemeInfo.cxx b/vcl/qa/cppunit/app/test_IconThemeInfo.cxx
new file mode 100644
index 000000000000..e401046757ba
--- /dev/null
+++ b/vcl/qa/cppunit/app/test_IconThemeInfo.cxx
@@ -0,0 +1,143 @@
+/* -*- 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 <sal/types.h>
+
+#include <rtl/ustring.hxx>
+#include <vcl/IconThemeInfo.hxx>
+
+#include <cppunit/TestAssert.h>
+#include <cppunit/TestFixture.h>
+#include <cppunit/extensions/HelperMacros.h>
+#include <cppunit/plugin/TestPlugIn.h>
+
+using namespace vcl;
+
+class IconThemeInfoTest : public CppUnit::TestFixture
+{
+    void
+    UpperCaseDisplayNameIsReturnedForNonDefaultId();
+
+    void
+    ImagesZipIsNotValid();
+
+    void
+    ImagesOxygenZipIsValid();
+
+    void
+    DefaultZipIsValid();
+
+    void
+    ThemeIdIsDetectedFromFileNameWithUnderscore();
+
+    void
+    ExceptionIsThrownWhenIdCannotBeDetermined1();
+
+    void
+    ExceptionIsThrownWhenIdCannotBeDetermined2();
+
+    void
+    GalaxyIsReturnedAsDisplayNameForDefaultZip();
+
+    // Adds code needed to register the test suite
+    CPPUNIT_TEST_SUITE(IconThemeInfoTest);
+    CPPUNIT_TEST(UpperCaseDisplayNameIsReturnedForNonDefaultId);
+    CPPUNIT_TEST(ThemeIdIsDetectedFromFileNameWithUnderscore);
+    CPPUNIT_TEST(ImagesZipIsNotValid);
+    CPPUNIT_TEST(ImagesOxygenZipIsValid);
+    CPPUNIT_TEST(DefaultZipIsValid);
+    CPPUNIT_TEST(GalaxyIsReturnedAsDisplayNameForDefaultZip);
+    CPPUNIT_TEST(ExceptionIsThrownWhenIdCannotBeDetermined1);
+    CPPUNIT_TEST(ExceptionIsThrownWhenIdCannotBeDetermined2);
+
+    // End of test suite definition
+    CPPUNIT_TEST_SUITE_END();
+};
+
+void
+IconThemeInfoTest::UpperCaseDisplayNameIsReturnedForNonDefaultId()
+{
+    OUString id("katze");
+    OUString displayName = vcl::IconThemeInfo::ThemeIdToDisplayName(id);
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("theme id is properly uppercased", OUString("Katze"), displayName);
+}
+
+void
+IconThemeInfoTest::ImagesZipIsNotValid()
+{
+    OUString id("file://images.zip");
+    bool valid = vcl::IconThemeInfo::UrlCanBeParsed(id);
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("images.zip is not a valid theme name", false, valid);
+}
+
+void
+IconThemeInfoTest::ImagesOxygenZipIsValid()
+{
+    OUString id("file://images_oxygen.zip");
+    bool valid = vcl::IconThemeInfo::UrlCanBeParsed(id);
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("images_oxygen.zip is a valid theme name", true, valid);
+}
+
+void
+IconThemeInfoTest::DefaultZipIsValid()
+{
+    OUString id("file://default.zip");
+    bool valid = vcl::IconThemeInfo::UrlCanBeParsed(id);
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("default.zip is a valid theme name", true, valid);
+}
+
+
+void
+IconThemeInfoTest::ThemeIdIsDetectedFromFileNameWithUnderscore()
+{
+    OUString fname("images_oxygen.zip");
+    OUString sname = vcl::IconThemeInfo::FileNameToThemeId(fname);
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("'oxygen' theme id is returned for 'images_oxygen.zip'", OUString("oxygen"), sname);
+}
+
+void
+IconThemeInfoTest::ExceptionIsThrownWhenIdCannotBeDetermined1()
+{
+    bool thrown = false;
+    OUString fname("images_oxygen");
+    try {
+        OUString sname = vcl::IconThemeInfo::FileNameToThemeId(fname);
+    }
+    catch (std::runtime_error&) {
+        thrown = true;
+    }
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("Exception was thrown",true, thrown);
+}
+
+void
+IconThemeInfoTest::ExceptionIsThrownWhenIdCannotBeDetermined2()
+{
+    bool thrown = false;
+    OUString fname("image_oxygen.zip");
+    try {
+        OUString sname = vcl::IconThemeInfo::FileNameToThemeId(fname);
+    }
+    catch (std::runtime_error&) {
+        thrown = true;
+    }
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("Exception was thrown", true, thrown);
+}
+
+void
+IconThemeInfoTest::GalaxyIsReturnedAsDisplayNameForDefaultZip()
+{
+    OUString id("file://default.zip");
+    IconThemeInfo i(id);
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("default.zip is displayed as Galaxy", OUString("Galaxy"), i.GetDisplayName());
+}
+
+// Put the test suite in the registry
+CPPUNIT_TEST_SUITE_REGISTRATION(IconThemeInfoTest);
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/qa/cppunit/app/test_IconThemeScanner.cxx b/vcl/qa/cppunit/app/test_IconThemeScanner.cxx
new file mode 100644
index 000000000000..af2e95703953
--- /dev/null
+++ b/vcl/qa/cppunit/app/test_IconThemeScanner.cxx
@@ -0,0 +1,86 @@
+/* -*- 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 <sal/types.h>
+
+#include <rtl/ustring.hxx>
+#include <vcl/IconThemeScanner.hxx>
+#include <vcl/IconThemeInfo.hxx>
+
+#include <cppunit/TestAssert.h>
+#include <cppunit/TestFixture.h>
+#include <cppunit/extensions/HelperMacros.h>
+#include <cppunit/plugin/TestPlugIn.h>
+
+class IconThemeScannerTest : public CppUnit::TestFixture
+{
+    void
+    AddedThemeIsFoundById();
+
+    void
+    AddedThemeInfoIsReturned();
+
+    void
+    ExceptionIsThrownIfInvalidInfoIsRequested();
+
+    // Adds code needed to register the test suite
+    CPPUNIT_TEST_SUITE(IconThemeScannerTest);
+    CPPUNIT_TEST(AddedThemeIsFoundById);
+    CPPUNIT_TEST(AddedThemeInfoIsReturned);
+    CPPUNIT_TEST(ExceptionIsThrownIfInvalidInfoIsRequested);
+
+    // End of test suite definition
+    CPPUNIT_TEST_SUITE_END();
+};
+
+void
+IconThemeScannerTest::AddedThemeIsFoundById()
+{
+    vcl::IconThemeScanner scanner;
+    OUString theme("file:://images_katze.zip");
+    scanner.AddIconThemeByPath(theme);
+    OUString id = vcl::IconThemeInfo::FileNameToThemeId("images_katze.zip");
+    bool found = false;
+    found = scanner.IconThemeIsInstalled(id);
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("icon theme could be added by url", true, found);
+}
+
+void
+IconThemeScannerTest::AddedThemeInfoIsReturned()
+{
+    vcl::IconThemeScanner scanner;
+    OUString theme("file:://images_katze.zip");
+    scanner.AddIconThemeByPath(theme);
+    OUString id = vcl::IconThemeInfo::FileNameToThemeId("images_katze.zip");
+    const vcl::IconThemeInfo& info = scanner.GetIconThemeInfo(id);
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("'katze' icon theme is found from id", theme, info.GetUrlToFile());
+}
+
+void
+IconThemeScannerTest::ExceptionIsThrownIfInvalidInfoIsRequested()
+{
+    vcl::IconThemeScanner scanner;
+    OUString theme("file:://images_katze.zip");
+    scanner.AddIconThemeByPath(theme);
+    bool thrown = false;
+    try
+    {
+        scanner.GetIconThemeInfo("hund");
+    }
+    catch (const std::runtime_error&)
+    {
+        thrown = true;
+    }
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("Exception is thrown if invalid theme info is requested", true, thrown);
+}
+
+// Put the test suite in the registry
+CPPUNIT_TEST_SUITE_REGISTRATION(IconThemeScannerTest);
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/qa/cppunit/app/test_IconThemeSelector.cxx b/vcl/qa/cppunit/app/test_IconThemeSelector.cxx
new file mode 100644
index 000000000000..34961e761dcc
--- /dev/null
+++ b/vcl/qa/cppunit/app/test_IconThemeSelector.cxx
@@ -0,0 +1,198 @@
+/* -*- 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/IconThemeSelector.hxx>
+
+#include <vcl/IconThemeScanner.hxx>
+#include <vcl/IconThemeInfo.hxx>
+
+#include <cppunit/TestAssert.h>
+#include <cppunit/TestFixture.h>
+#include <cppunit/extensions/HelperMacros.h>
+#include <cppunit/plugin/TestPlugIn.h>
+
+class IconThemeSelectorTest : public CppUnit::TestFixture
+{
+    void
+    OxygenThemeIsReturnedForKde4Desktop();
+
+    void
+    TangoThemeIsReturnedForGtkDesktop();
+
+    void
+    ThemeIsOverriddenByPreferredTheme();
+
+    void
+    ThemeIsOverriddenByHighContrastMode();
+
+    void
+    NotInstalledThemeDoesNotOverride();
+
+    void
+    InstalledThemeIsFound();
+
+    void
+    FirstThemeIsReturnedIfRequestedThemeIsNotFound();
+
+    void
+    FallbackThemeIsReturnedForEmptyInput();
+
+    void
+    DifferentPreferredThemesAreInequal();
+
+    void
+    DifferentHighContrastModesAreInequal();
+
+    static std::vector<vcl::IconThemeInfo>
+    GetFakeInstalledThemes();
+
+    // Adds code needed to register the test suite
+    CPPUNIT_TEST_SUITE(IconThemeSelectorTest);
+
+    CPPUNIT_TEST(OxygenThemeIsReturnedForKde4Desktop);
+    CPPUNIT_TEST(TangoThemeIsReturnedForGtkDesktop);
+    CPPUNIT_TEST(ThemeIsOverriddenByPreferredTheme);
+    CPPUNIT_TEST(ThemeIsOverriddenByHighContrastMode);
+    CPPUNIT_TEST(NotInstalledThemeDoesNotOverride);
+    CPPUNIT_TEST(InstalledThemeIsFound);
+    CPPUNIT_TEST(FirstThemeIsReturnedIfRequestedThemeIsNotFound);
+    CPPUNIT_TEST(FallbackThemeIsReturnedForEmptyInput);
+    CPPUNIT_TEST(DifferentPreferredThemesAreInequal);
+    CPPUNIT_TEST(DifferentHighContrastModesAreInequal);
+
+    // End of test suite definition
+
+
+    CPPUNIT_TEST_SUITE_END();
+};
+
+/*static*/ std::vector<vcl::IconThemeInfo>
+IconThemeSelectorTest::GetFakeInstalledThemes()
+{
+    std::vector<vcl::IconThemeInfo> r;
+    vcl::IconThemeInfo a{};
+    a.mThemeId = "tango";
+    r.push_back(a);
+    a.mThemeId = "oxygen";
+    r.push_back(a);
+    a.mThemeId = vcl::IconThemeSelector::HIGH_CONTRAST_ICON_THEME_ID;
+    r.push_back(a);
+    return r;
+}
+
+void
+IconThemeSelectorTest::OxygenThemeIsReturnedForKde4Desktop()
+{
+    std::vector<vcl::IconThemeInfo> themes = GetFakeInstalledThemes();
+    vcl::IconThemeSelector s;
+    OUString r = s.SelectIconThemeForDesktopEnvironment(themes, "kde4");
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("'oxygen' theme is returned for kde4 desktop", OUString("oxygen"), r);
+}
+
+void
+IconThemeSelectorTest::TangoThemeIsReturnedForGtkDesktop()
+{
+    std::vector<vcl::IconThemeInfo> themes = GetFakeInstalledThemes();
+    vcl::IconThemeSelector s;
+    OUString r = s.SelectIconThemeForDesktopEnvironment(themes, "gtk");
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("'tango' theme is returned for kde4 desktop", OUString("tango"), r);
+}
+
+void
+IconThemeSelectorTest::ThemeIsOverriddenByPreferredTheme()
+{
+    vcl::IconThemeSelector s;
+    OUString preferred("oxygen");
+    s.SetPreferredIconTheme(preferred);
+    std::vector<vcl::IconThemeInfo> themes = GetFakeInstalledThemes();
+    OUString selected = s.SelectIconThemeForDesktopEnvironment(themes, "gtk");
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("'tango' theme is overridden by oxygen", preferred, selected);
+}
+
+void
+IconThemeSelectorTest::ThemeIsOverriddenByHighContrastMode()
+{
+    vcl::IconThemeSelector s;
+    s.SetUseHighContrastTheme(true);
+    std::vector<vcl::IconThemeInfo> themes = GetFakeInstalledThemes();
+    OUString selected = s.SelectIconTheme(themes, "tango");
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("'tango' theme is overridden by high contrast mode",
+            vcl::IconThemeSelector::HIGH_CONTRAST_ICON_THEME_ID, selected);
+    s.SetUseHighContrastTheme(false);
+    selected = s.SelectIconTheme(themes, "tango");
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("'tango' theme is no longer overridden by high contrast mode",
+            OUString("tango"), selected);
+}
+
+void
+IconThemeSelectorTest::NotInstalledThemeDoesNotOverride()
+{
+    vcl::IconThemeSelector s;
+    s.SetPreferredIconTheme("oxygen_katze");
+    std::vector<vcl::IconThemeInfo> themes = GetFakeInstalledThemes();
+    OUString selected = s.SelectIconTheme(themes, "oxygen");
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("'oxygen' theme is not overridden by 'oxygen_katze'", OUString("oxygen"), selected);
+}
+
+void
+IconThemeSelectorTest::InstalledThemeIsFound()
+{
+    vcl::IconThemeSelector s;
+    std::vector<vcl::IconThemeInfo> themes = GetFakeInstalledThemes();
+    OUString selected = s.SelectIconTheme(themes, "oxygen");
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("'oxygen' theme is found", OUString("oxygen"), selected);
+}
+
+void
+IconThemeSelectorTest::FirstThemeIsReturnedIfRequestedThemeIsNotFound()
+{
+    vcl::IconThemeSelector s;
+    std::vector<vcl::IconThemeInfo> themes = GetFakeInstalledThemes();
+    OUString selected = s.SelectIconTheme(themes, "oxygen_katze");
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("'oxygen' theme is found", themes.front().GetThemeId(), selected);
+}
+
+void
+IconThemeSelectorTest::FallbackThemeIsReturnedForEmptyInput()
+{
+    vcl::IconThemeSelector s;
+    OUString selected = s.SelectIconTheme(std::vector<vcl::IconThemeInfo>{}, "oxygen");
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("fallback is returned for empty input",
+            vcl::IconThemeSelector::FALLBACK_ICON_THEME_ID, selected);
+}
+
+void
+IconThemeSelectorTest::DifferentHighContrastModesAreInequal()
+{
+    vcl::IconThemeSelector s1;
+    vcl::IconThemeSelector s2;
+    s1.SetUseHighContrastTheme(true);
+    s2.SetUseHighContrastTheme(false);
+    bool equal = (s1 == s2);
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("Different high contrast modes are detected as inequal", false, equal);
+}
+
+void
+IconThemeSelectorTest::DifferentPreferredThemesAreInequal()
+{
+    vcl::IconThemeSelector s1;
+    vcl::IconThemeSelector s2;
+    s1.SetPreferredIconTheme("oxygen");
+    s2.SetUseHighContrastTheme("katze");
+    bool equal = (s1 == s2);
+    CPPUNIT_ASSERT_EQUAL_MESSAGE("Different preferred themes are detected as inequal", false, equal);
+}
+
+
+// Put the test suite in the registry
+CPPUNIT_TEST_SUITE_REGISTRATION(IconThemeSelectorTest);
+
+CPPUNIT_PLUGIN_IMPLEMENT();
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/source/app/IconThemeInfo.cxx b/vcl/source/app/IconThemeInfo.cxx
new file mode 100644
index 000000000000..69f0302b6909
--- /dev/null
+++ b/vcl/source/app/IconThemeInfo.cxx
@@ -0,0 +1,180 @@
+/*
+ * 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>
+
+namespace {
+
+OUString
+filename_from_url(const OUString& url)
+{
+    sal_Int32 slashPosition = url.lastIndexOf( '/' );
+    if (slashPosition < 0) {
+        return OUString("");
+    }
+    OUString filename = url.copy( slashPosition+1 );
+    return filename;
+}
+
+}
+
+namespace vcl {
+
+static const char ICON_THEME_PACKAGE_PREFIX[] = "images_";
+
+static const char EXTENSION_FOR_ICON_PACKAGES[] = ".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(const OUString& themeName)
+{
+    if (themeName == "tango") {
+        return Size( 24, 24 );
+    }
+    else if (themeName == "crystal") {
+        return Size( 22, 22 );
+    }
+    else if (themeName == "default") {
+        return Size( 22, 22 );
+    }
+    else {
+        return Size( 26, 26 );
+    }
+}
+
+/*static*/ bool
+IconThemeInfo::UrlCanBeParsed(const OUString& url)
+{
+    OUString fname = filename_from_url(url);
+    if (fname.isEmpty()) {
+        return false;
+    }
+
+    if (fname == "default.zip") {
+        return true;
+    }
+
+    if (!fname.startsWithIgnoreAsciiCase(ICON_THEME_PACKAGE_PREFIX)) {
+        return false;
+    }
+
+    if (!fname.endsWithIgnoreAsciiCase(EXTENSION_FOR_ICON_PACKAGES, nullptr)) {
+        return false;
+    }
+
+    return true;
+}
+
+/*static*/ OUString
+IconThemeInfo::FileNameToThemeId(const OUString& filename)
+{
+    if (filename == "default.zip") {
+        return OUString("default");
+    }
+    OUString r;
+    sal_Int32 positionOfLastDot = filename.lastIndexOf(EXTENSION_FOR_ICON_PACKAGES);
+    if (positionOfLastDot < 0) { // -1 means index not found
+        throw std::runtime_error("IconThemeInfo::FileNameToThemeId() called with invalid filename.");
+    }
+    sal_Int32 positionOfFirstUnderscore = filename.indexOf(ICON_THEME_PACKAGE_PREFIX);
+    if (positionOfFirstUnderscore < 0) { // -1 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.copy(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.");
+    }
+
+    if (themeId == "default") {
+        return OUString("Galaxy");
+    }
+
+    // make the first letter uppercase
+    OUString r;
+    sal_Unicode firstLetter = themeId[0];
+    if (rtl::isAsciiLowerCase(firstLetter)) {
+        r = OUString(rtl::toAsciiUpperCase(firstLetter));
+        r += themeId.copy(1);
+    }
+    else {
+        r = themeId;
+    }
+    return r;
+}
+
+namespace
+{
+    class SameTheme :
+        public std::unary_function<const vcl::IconThemeInfo &, bool>
+    {
+    private:
+        const OUString& m_rThemeId;
+    public:
+        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)
+{
+    std::vector<vcl::IconThemeInfo>::const_iterator it = std::find_if(themes.begin(), themes.end(),
+               SameTheme(themeId));
+    if (it != themes.end()) {
+        return true;
+    }
+    else {
+        return false;
+    }
+}
+
+} // end namespace vcl
+
+
diff --git a/vcl/source/app/IconThemeScanner.cxx b/vcl/source/app/IconThemeScanner.cxx
new file mode 100644
index 000000000000..e6a6a130b92f
--- /dev/null
+++ b/vcl/source/app/IconThemeScanner.cxx
@@ -0,0 +1,185 @@
+/*
+ * 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/IconThemeScanner.hxx>
+
+#include <config_folders.h>
+#include <osl/file.hxx>
+#include <rtl/bootstrap.hxx>
+
+#include <vcl/svapp.hxx>
+#include <vcl/IconThemeInfo.hxx>
+
+namespace vcl {
+
+namespace {
+
+bool
+search_path_is_valid(const OUString& dir)
+{
+    osl::DirectoryItem dirItem;
+    osl::FileBase::RC retvalGet = osl::DirectoryItem::get(dir, dirItem);
+    if (retvalGet != osl::FileBase::RC::E_None) {
+        return false;
+    }
+    osl::FileStatus fileStatus(osl_FileStatus_Mask_Type);
+    osl::FileBase::RC retvalStatus = dirItem.getFileStatus(fileStatus);
+    if (retvalStatus != osl::FileBase::RC::E_None) {
+        return false;
+    }
+
+    if (!fileStatus.isDirectory()) {
+        return false;
+    }
+    return true;
+}
+
+}
+
+IconThemeScanner::IconThemeScanner()
+{;}
+
+bool
+IconThemeScanner::ScanDirectoryForIconThemes(const OUString& path)
+{
+    bool pathIsValid = search_path_is_valid(path);
+    if (!pathIsValid) {
+        return false;
+    }
+    std::vector<OUString> iconThemePaths = ReadIconThemesFromPath(path);
+    if (iconThemePaths.empty()) {
+        return false;
+    }
+    mFoundIconThemes.clear();
+    for (const OUString& pathToTheme : iconThemePaths) {
+        AddIconThemeByPath(pathToTheme);
+    }
+    return true;
+}
+
+bool
+IconThemeScanner::AddIconThemeByPath(const OUString &url)
+{
+    if (!IconThemeInfo::UrlCanBeParsed(url)) {
+        return false;
+    }
+    IconThemeInfo newTheme{url};
+    mFoundIconThemes.push_back(newTheme);
+    return true;
+}
+
+/*static*/ std::vector<OUString>
+IconThemeScanner::ReadIconThemesFromPath(const OUString& dir)
+{
+    std::vector<OUString> found;
+
+    osl::Directory dirToScan(dir);
+    osl::FileBase::RC retvalOpen = dirToScan.open();
+    if (retvalOpen != osl::FileBase::RC::E_None) {
+        return found;
+    }
+
+    osl::DirectoryItem directoryItem;
+    while (dirToScan.getNextItem(directoryItem) == osl::FileBase::RC::E_None) {
+        osl::FileStatus status(osl_FileStatus_Mask_Type | osl_FileStatus_Mask_FileURL | osl_FileStatus_Mask_FileName);
+        osl::FileBase::RC retvalStatus = directoryItem.getFileStatus(status);
+        if (retvalStatus != osl::FileBase::RC::E_None) {
+            continue;
+        }
+        if (!status.isRegular()) {
+            continue;
+        }
+        if (!FileIsValidIconTheme(status.getFileURL())) {
+            continue;
+        }
+        OUString entry;
+        entry = status.getFileURL();
+        found.push_back(entry);
+    }
+    return found;
+}
+
+/*static*/ bool
+IconThemeScanner::FileIsValidIconTheme(const OUString& filename)
+{
+    // check whether we can construct a IconThemeInfo from it
+    if (!IconThemeInfo::UrlCanBeParsed(filename)) {
+        return false;
+    }
+
+    // check whether the file is a regular file
+    osl::DirectoryItem dirItem;
+    osl::FileBase::RC retvalGet = osl::DirectoryItem::get(filename, dirItem);
+    if (retvalGet != osl::FileBase::RC::E_None) {
+        return false;
+    }
+    osl::FileStatus fileStatus(osl_FileStatus_Mask_Type);
+    osl::FileBase::RC retvalStatus = dirItem.getFileStatus(fileStatus);
+    if (retvalStatus != osl::FileBase::RC::E_None) {
+        return false;
+    }
+    if (!fileStatus.isRegular()) {
+        return false;
+    }
+    return true;
+}
+
+bool
+IconThemeScanner::IconThemeIsInstalled(const OUString& themeId) const
+{
+    return IconThemeInfo::IconThemeIsInVector(mFoundIconThemes, themeId);
+}
+
+/*static*/ boost::shared_ptr<IconThemeScanner>
+IconThemeScanner::Create(const OUString &path)
+{
+    boost::shared_ptr<IconThemeScanner> retval(new IconThemeScanner{});
+    retval->ScanDirectoryForIconThemes(path);
+    return retval;
+}
+
+/*static*/ OUString
+IconThemeScanner::GetStandardIconThemePath()
+{
+    OUString url( "$BRAND_BASE_DIR/" LIBO_SHARE_FOLDER "/config/" );
+    rtl::Bootstrap::expandMacros(url);
+    return url;
+}
+
+IconThemeScanner::~IconThemeScanner()
+{;}
+
+namespace
+{
+    class SameTheme :
+        public std::unary_function<const vcl::IconThemeInfo &, bool>
+    {
+    private:
+        const OUString& m_rThemeId;
+    public:
+        SameTheme(const OUString &rThemeId) : m_rThemeId(rThemeId) {}
+        bool operator()(const vcl::IconThemeInfo &rInfo)
+        {
+            return m_rThemeId == rInfo.GetThemeId();
+        }
+    };
+}
+
+const vcl::IconThemeInfo&
+IconThemeScanner::GetIconThemeInfo(const OUString& themeId)
+{
+    std::vector<IconThemeInfo>::iterator info = std::find_if(mFoundIconThemes.begin(), mFoundIconThemes.end(),
+        SameTheme(themeId));
+    if (info == mFoundIconThemes.end()) {
+        throw std::runtime_error("Requested information on not-installed icon theme");
+    }
+    return *info;
+}
+
+
+} // end namespace vcl
diff --git a/vcl/source/app/IconThemeSelector.cxx b/vcl/source/app/IconThemeSelector.cxx
new file mode 100644
index 000000000000..023745bf9bcd
--- /dev/null
+++ b/vcl/source/app/IconThemeSelector.cxx
@@ -0,0 +1,156 @@
+/* -*- 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/IconThemeSelector.hxx>
+
+#include <vcl/IconThemeScanner.hxx>
+#include <vcl/IconThemeInfo.hxx>
+
+#include <algorithm>
+
+namespace vcl {
+
+/*static*/ const OUString
+IconThemeSelector::HIGH_CONTRAST_ICON_THEME_ID("hicontrast");
+
+/*static*/ const OUString
+IconThemeSelector::FALLBACK_ICON_THEME_ID("tango");
+
+
+namespace {
+
+    class SameTheme :
+        public std::unary_function<const vcl::IconThemeInfo &, bool>
+    {
+    private:
+        const OUString& m_rThemeId;
+    public:
+        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::find_if(installedThemes.begin(), installedThemes.end(),
+               SameTheme(theme)
+           ) != installedThemes.end();
+}
+
+} // end anonymous namespace
+
+IconThemeSelector::IconThemeSelector()
+: mUseHighContrastTheme(false)
+{
+}
+
+/*static*/ OUString
+IconThemeSelector::GetIconThemeForDesktopEnvironment(const OUString& desktopEnvironment)
+{
+    OUString r;
+    if ( desktopEnvironment.equalsIgnoreAsciiCase("tde") ||
+         desktopEnvironment.equalsIgnoreAsciiCase("kde") ) {
+        r = "crystal";
+    }
+    else if ( desktopEnvironment.equalsIgnoreAsciiCase("kde4") ) {
+        r = "oxygen";
+    }
+    else {
+        r = FALLBACK_ICON_THEME_ID;
+    }
+    return r;
+}
+
+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;
+        }
+    }
+
+    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(HIGH_CONTRAST_ICON_THEME_ID, installedThemes)) {
+            return HIGH_CONTRAST_ICON_THEME_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)
+{
+    mPreferredIconTheme = theme;
+}
+
+bool
+IconThemeSelector::operator==(const vcl::IconThemeSelector& other) const
+{
+    if (this == &other) {
+        return true;
+    }
+    if (mPreferredIconTheme != other.mPreferredIconTheme) {
+        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: */
diff --git a/vcl/source/app/settings.cxx b/vcl/source/app/settings.cxx
index 97147478d3b0..c6c93dda5579 100644
--- a/vcl/source/app/settings.cxx
+++ b/vcl/source/app/settings.cxx
@@ -25,11 +25,14 @@
 #include "comphelper/processfactory.hxx"
 #include <rtl/bootstrap.hxx>
 #include "tools/debug.hxx"
-#include <vcl/graphicfilter.hxx>
 
 #include "i18nlangtag/mslangid.hxx"
 #include "i18nlangtag/languagetag.hxx"
 
+#include <vcl/graphicfilter.hxx>
+#include <vcl/IconThemeScanner.hxx>
+#include <vcl/IconThemeSelector.hxx>
+#include <vcl/IconThemeInfo.hxx>
 #include "vcl/svapp.hxx"
 #include "vcl/event.hxx"
 #include "vcl/settings.hxx"
@@ -53,9 +56,6 @@ using namespace ::com::sun::star;
 
 // =======================================================================
 
-
-// =======================================================================
-
 ImplMouseData::ImplMouseData()
 {
     mnOptions                   = 0;
@@ -182,6 +182,8 @@ bool MouseSettings::operator ==( const MouseSettings& rSet ) const
 // =======================================================================
 
 ImplStyleData::ImplStyleData() :
+    mIconThemeScanner(vcl::IconThemeScanner::Create(vcl::IconThemeScanner::GetStandardIconThemePath())),
+    mIconThemeSelector(new vcl::IconThemeSelector()),
     maPersonaHeaderFooter(),
     maPersonaHeaderBitmap(),
     maPersonaFooterBitmap()
@@ -205,9 +207,7 @@ ImplStyleData::ImplStyleData() :
     mnOptions                   = 0;
     mnAutoMnemonic              = 1;
     mnToolbarIconSize           = STYLE_TOOLBAR_ICONSIZE_UNKNOWN;
-    mnSymbolsStyle              = STYLE_SYMBOLS_AUTO;
     mnUseImagesInMenus          = AUTO_STATE_AUTO;
-    mnPreferredSymbolsStyle         = STYLE_SYMBOLS_AUTO;
     mpFontOptions              = NULL;
     mnEdgeBlending = 35;
     maEdgeBlendingTopLeftColor = RGB_COLORDATA(0xC0, 0xC0, 0xC0);
@@ -288,6 +288,7 @@ ImplStyleData::ImplStyleData( const ImplStyleData& rData ) :
     maFieldFont( rData.maFieldFont ),
     maIconFont( rData.maIconFont ),
     maGroupFont( rData.maGroupFont ),
+    mIconTheme(rData.mIconTheme),
     maWorkspaceGradient( rData.maWorkspaceGradient ),
     maDialogStyle( rData.maDialogStyle ),
     maFrameStyle( rData.maFrameStyle ),
@@ -317,20 +318,20 @@ ImplStyleData::ImplStyleData( const ImplStyleData& rData ) :
     mnSelectionOptions          = rData.mnSelectionOptions;
     mnDisplayOptions            = rData.mnDisplayOptions;
     mnOptions                   = rData.mnOptions;
-    mnHighContrast              = rData.mnHighContrast;
-    mnUseSystemUIFonts          = rData.mnUseSystemUIFonts;
+    mbHighContrast              = rData.mbHighContrast;
+    mbUseSystemUIFonts          = rData.mbUseSystemUIFonts;
     mnUseFlatBorders            = rData.mnUseFlatBorders;
     mnUseFlatMenus              = rData.mnUseFlatMenus;
     mnAutoMnemonic              = rData.mnAutoMnemonic;
     mnUseImagesInMenus          = rData.mnUseImagesInMenus;
     mbPreferredUseImagesInMenus = rData.mbPreferredUseImagesInMenus;
-    mnSkipDisabledInMenus       = rData.mnSkipDisabledInMenus;
+    mbSkipDisabledInMenus       = rData.mbSkipDisabledInMenus;
     mbHideDisabledMenuItems     = rData.mbHideDisabledMenuItems;
     mbAcceleratorsInContextMenus = rData.mbAcceleratorsInContextMenus;
     mbPrimaryButtonWarpsSlider  = rData.mbPrimaryButtonWarpsSlider;
     mnToolbarIconSize           = rData.mnToolbarIconSize;
-    mnSymbolsStyle              = rData.mnSymbolsStyle;
-    mnPreferredSymbolsStyle     = rData.mnPreferredSymbolsStyle;
+    mIconThemeScanner.reset(new vcl::IconThemeScanner(*rData.mIconThemeScanner));
+    mIconThemeSelector.reset(new vcl::IconThemeSelector(*rData.mIconThemeSelector));
     mpFontOptions               = rData.mpFontOptions;
     mnEdgeBlending              = rData.mnEdgeBlending;
     maEdgeBlendingTopLeftColor  = rData.maEdgeBlendingTopLeftColor;
@@ -422,12 +423,12 @@ void ImplStyleData::SetStandardStyles()
     mnFloatTitleHeight          = 13;
     mnTearOffTitleHeight        = 8;
     mnMenuBarHeight             = 14;
-    mnHighContrast              = false;
-    mnUseSystemUIFonts          = true;
+    mbHighContrast              = false;
+    mbUseSystemUIFonts          = true;
     mnUseFlatBorders            = false;
     mnUseFlatMenus              = false;
     mbPreferredUseImagesInMenus = true;
-    mnSkipDisabledInMenus       = false;
+    mbSkipDisabledInMenus       = false;
     mbHideDisabledMenuItems     = false;
     mbAcceleratorsInContextMenus = true;
     mbPrimaryButtonWarpsSlider = false;
@@ -500,75 +501,6 @@ void StyleSettings::Set3DColors( const Color& rColor )
     }
 }
 
-// -----------------------------------------------------------------------
-
-OUString StyleSettings::ImplSymbolsStyleToName( sal_uLong nStyle ) const
-{
-    switch ( nStyle )
-    {
-        case STYLE_SYMBOLS_DEFAULT:    return OUString("default");
-        case STYLE_SYMBOLS_HICONTRAST: return OUString("hicontrast");
-        case STYLE_SYMBOLS_INDUSTRIAL: return OUString("tango"); // industrial is dead
-        case STYLE_SYMBOLS_CRYSTAL:    return OUString("crystal");
-        case STYLE_SYMBOLS_TANGO:      return OUString("tango");
-        case STYLE_SYMBOLS_OXYGEN:     return OUString("oxygen");
-        case STYLE_SYMBOLS_CLASSIC:    return OUString("classic");
-        case STYLE_SYMBOLS_HUMAN:      return OUString("human");
-        case STYLE_SYMBOLS_SIFR:       return OUString("sifr");
-        case STYLE_SYMBOLS_TANGO_TESTING: return OUString("tango_testing");
-    }
-
-    return OUString("auto");
-}
-
-// -----------------------------------------------------------------------
-
-sal_uLong StyleSettings::ImplNameToSymbolsStyle( const OUString &rName ) const
-{
-    if ( rName == "default" )
-        return STYLE_SYMBOLS_DEFAULT;
-    else if ( rName == "hicontrast" )
-        return STYLE_SYMBOLS_HICONTRAST;
-    else if ( rName == "industrial" )
-        return STYLE_SYMBOLS_TANGO; // industrial is dead
-    else if ( rName == "crystal" )
-        return STYLE_SYMBOLS_CRYSTAL;
-    else if ( rName == "tango" )
-        return STYLE_SYMBOLS_TANGO;
-    else if ( rName == "oxygen" )
-        return STYLE_SYMBOLS_OXYGEN;
-    else if ( rName == "classic" )
-        return STYLE_SYMBOLS_CLASSIC;
-    else if ( rName == "human" )
-        return STYLE_SYMBOLS_HUMAN;
-    else if ( rName == "sifr" )
-        return STYLE_SYMBOLS_SIFR;
-    else if ( rName == "tango_testing" )
-        return STYLE_SYMBOLS_TANGO_TESTING;
-
-    return STYLE_SYMBOLS_AUTO;
-}
-
-// -----------------------------------------------------------------------
-
-/**
-    The preferred style name can be read from the desktop setting. We
-    need to find the closest theme name registered in OOo. Therefore
-    we check if any registered style name is a case-insensitive
-    substring of the preferred style name.
-*/
-void StyleSettings::SetPreferredSymbolsStyleName( const OUString &rName )
-{
-    if ( !rName.isEmpty() )
-    {
-        OUString rNameLowCase( rName.toAsciiLowerCase() );
-
-        for( sal_uInt32 n = 0; n <= STYLE_SYMBOLS_THEMES_MAX; n++ )
-            if ( rNameLowCase.indexOf( ImplSymbolsStyleToName( n ) ) != -1 )
-                SetPreferredSymbolsStyle( n );
-    }
-}
-
 void StyleSettings::SetCheckedColorSpecialCase( )
 {
     CopyData();
@@ -584,99 +516,6 @@ void StyleSettings::SetCheckedColorSpecialCase( )
     }
 }
 
-// -----------------------------------------------------------------------
-
-sal_uLong StyleSettings::GetCurrentSymbolsStyle() const
-{
-    // style selected in Tools -> Options... -> LibreOffice -> View
-    sal_uLong nStyle = GetSymbolsStyle();
-
-    if ( nStyle == STYLE_SYMBOLS_AUTO || ( !CheckSymbolStyle (nStyle) ) )
-    {
-        // the preferred style can be read from the desktop setting by the desktop native widgets modules
-        sal_uLong nPreferredStyle = GetPreferredSymbolsStyle();
-
-        if ( nPreferredStyle == STYLE_SYMBOLS_AUTO || ( !CheckSymbolStyle (nPreferredStyle) ) )
-        {
-
-            // use a hardcoded desktop-specific fallback if no preferred style has been detected
-            static bool sbFallbackDesktopChecked = false;
-            static sal_uLong snFallbackDesktopStyle = STYLE_SYMBOLS_DEFAULT;
-
-            if ( !sbFallbackDesktopChecked )
-            {
-                snFallbackDesktopStyle = GetAutoSymbolsStyle();
-                sbFallbackDesktopChecked = true;
-            }
-
-            nPreferredStyle = snFallbackDesktopStyle;
-        }
-
-        if (GetHighContrastMode() && CheckSymbolStyle (STYLE_SYMBOLS_HICONTRAST) )
-            nStyle = STYLE_SYMBOLS_HICONTRAST;
-        else
-            nStyle = nPreferredStyle;
-    }
-
-    return nStyle;
-}
-
-// -----------------------------------------------------------------------
-
-sal_uLong StyleSettings::GetAutoSymbolsStyle() const
-{
-    OUString const & env = Application::GetDesktopEnvironment();
-
-    sal_uLong nRet;
-    if ( env.equalsIgnoreAsciiCase("tde") ||
-         env.equalsIgnoreAsciiCase("kde") )
-        nRet = STYLE_SYMBOLS_CRYSTAL;
-    else if ( env.equalsIgnoreAsciiCase("kde4") )
-        nRet = STYLE_SYMBOLS_OXYGEN;
-    else
-        nRet = STYLE_SYMBOLS_TANGO;
-
-    // fallback to any existing style
-    if ( ! CheckSymbolStyle (nRet) )
-    {
-        for ( sal_uLong n = 0 ; n <= STYLE_SYMBOLS_THEMES_MAX  ; n++ )
-        {
-            sal_uLong nStyleToCheck = n;
-
-            // auto is not a real theme => can't be fallback
-            if ( nStyleToCheck == STYLE_SYMBOLS_AUTO )
-                continue;
-
-            // will check hicontrast in the end
-            if ( nStyleToCheck == STYLE_SYMBOLS_HICONTRAST )
-                continue;
-            if ( nStyleToCheck == STYLE_SYMBOLS_THEMES_MAX )
-                nStyleToCheck = STYLE_SYMBOLS_HICONTRAST;
-
-            if ( CheckSymbolStyle ( nStyleToCheck ) )
-            {
-                nRet = nStyleToCheck;
-                n = STYLE_SYMBOLS_THEMES_MAX;
-            }
-        }
-    }
-
-    return nRet;
-}
-
-// -----------------------------------------------------------------------
-
-bool StyleSettings::CheckSymbolStyle( sal_uLong nStyle ) const
-{
-    if ( nStyle == STYLE_SYMBOLS_INDUSTRIAL )
-        return false; // industrial is dead
-
-    static ImplImageTreeSingletonRef aImageTree;
-    return aImageTree->checkStyle( ImplSymbolsStyleToName( nStyle ) );
-}
-
-// -----------------------------------------------------------------------
-
 bool StyleSettings::GetUseImagesInMenus() const
 {
     // icon mode selected in Tools -> Options... -> OpenOffice.org -> View
@@ -841,6 +680,14 @@ bool StyleSettings::operator ==( const StyleSettings& rSet ) const
     if ( mpData == rSet.mpData )
         return true;
 
+    if (mpData->mIconTheme != rSet.mpData->mIconTheme) {
+        return sal_False;
+    }
+
+    if (*mpData->mIconThemeSelector != *rSet.mpData->mIconThemeSelector) {
+        return sal_False;
+    }
+
     if ( (mpData->mnOptions                 == rSet.mpData->mnOptions)                  &&
          (mpData->mnAutoMnemonic            == rSet.mpData->mnAutoMnemonic)             &&
          (mpData->mnLogoDisplayTime         == rSet.mpData->mnLogoDisplayTime)          &&
@@ -864,12 +711,10 @@ bool StyleSettings::operator ==( const StyleSettings& rSet ) const
          (mpData->mnAntialiasedMin          == rSet.mpData->mnAntialiasedMin)           &&
          (mpData->mnScreenZoom              == rSet.mpData->mnScreenZoom)               &&
          (mpData->mnScreenFontZoom          == rSet.mpData->mnScreenFontZoom)           &&
-         (mpData->mnHighContrast            == rSet.mpData->mnHighContrast)             &&
-         (mpData->mnUseSystemUIFonts        == rSet.mpData->mnUseSystemUIFonts)         &&
+         (mpData->mbHighContrast            == rSet.mpData->mbHighContrast)             &&
+         (mpData->mbUseSystemUIFonts        == rSet.mpData->mbUseSystemUIFonts)         &&
          (mpData->mnUseFlatBorders          == rSet.mpData->mnUseFlatBorders)           &&
          (mpData->mnUseFlatMenus            == rSet.mpData->mnUseFlatMenus)             &&
-         (mpData->mnSymbolsStyle            == rSet.mpData->mnSymbolsStyle)             &&
-         (mpData->mnPreferredSymbolsStyle   == rSet.mpData->mnPreferredSymbolsStyle)    &&
          (mpData->maFaceColor               == rSet.mpData->maFaceColor)                &&
          (mpData->maCheckedColor            == rSet.mpData->maCheckedColor)             &&
          (mpData->maLightColor              == rSet.mpData->maLightColor)               &&
@@ -931,7 +776,7 @@ bool StyleSettings::operator ==( const StyleSettings& rSet ) const
          (mpData->maIconFont                == rSet.mpData->maIconFont)                 &&
          (mpData->mnUseImagesInMenus        == rSet.mpData->mnUseImagesInMenus)         &&
          (mpData->mbPreferredUseImagesInMenus == rSet.mpData->mbPreferredUseImagesInMenus) &&
-         (mpData->mnSkipDisabledInMenus     == rSet.mpData->mnSkipDisabledInMenus)      &&
+         (mpData->mbSkipDisabledInMenus     == rSet.mpData->mbSkipDisabledInMenus)      &&
          (mpData->mbHideDisabledMenuItems   == rSet.mpData->mbHideDisabledMenuItems)    &&
          (mpData->mbAcceleratorsInContextMenus  == rSet.mpData->mbAcceleratorsInContextMenus)&&
          (mpData->mbPrimaryButtonWarpsSlider == rSet.mpData->mbPrimaryButtonWarpsSlider) &&
@@ -1635,4 +1480,62 @@ StyleSettings::GetOptions() const
     return mpData->mnOptions;
 }
 
+std::vector<vcl::IconThemeInfo>
+StyleSettings::GetInstalledIconThemes() const
+{
+    return mpData->mIconThemeScanner->GetFoundIconThemes();
+}
+
+/*static*/ OUString
+StyleSettings::GetAutomaticallyChosenIconTheme() const
+{
+    OUString desktopEnvironment = Application::GetDesktopEnvironment();
+    OUString themeName = mpData->mIconThemeSelector->SelectIconThemeForDesktopEnvironment(
+            mpData->mIconThemeScanner->GetFoundIconThemes(),
+            desktopEnvironment
+            );
+    return themeName;
+}
+
+void
+StyleSettings::SetIconTheme(const OUString& theme)
+{
+    CopyData();
+    mpData->mIconTheme = theme;
+}
+
+OUString
+StyleSettings::DetermineIconTheme() const
+{
+    OUString r = mpData->mIconThemeSelector->SelectIconTheme(
+                        mpData->mIconThemeScanner->GetFoundIconThemes(),
+                        mpData->mIconTheme
+                        );
+    return r;
+}
+
+void
+StyleSettings::SetHighContrastMode(bool bHighContrast )
+{
+    if (mpData->mbHighContrast == bHighContrast) {
+        return;
+    }
+
+    CopyData();
+    mpData->mbHighContrast = bHighContrast;
+    mpData->mIconThemeSelector->SetUseHighContrastTheme(bHighContrast);
+}
+
+bool
+StyleSettings::GetHighContrastMode() const
+{
+    return mpData->mbHighContrast;
+}
+
+void
+StyleSettings::SetPreferredIconTheme(const OUString& theme)
+{
+    mpData->mIconThemeSelector->SetPreferredIconTheme(theme);
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/source/control/fixed.cxx b/vcl/source/control/fixed.cxx
index fe988dd0637c..695d3ae6b8e7 100644
--- a/vcl/source/control/fixed.cxx
+++ b/vcl/source/control/fixed.cxx
@@ -1210,13 +1210,13 @@ const Image& FixedImage::GetModeImage( ) const
 Image FixedImage::loadThemeImage(const OString &rFileName)
 {
     static ImplImageTreeSingletonRef aImageTree;
-    OUString sCurrentSymbolsStyle =
-        Application::GetSettings().GetStyleSettings().GetCurrentSymbolsStyleName();
+    OUString sIconTheme =
+        Application::GetSettings().GetStyleSettings().DetermineIconTheme();
     const OUString sFileName(OStringToOUString(rFileName, RTL_TEXTENCODING_UTF8));
     BitmapEx aBitmap;
-    bool bSuccess = aImageTree->loadImage(sFileName, sCurrentSymbolsStyle, aBitmap, true);
+    bool bSuccess = aImageTree->loadImage(sFileName, sIconTheme, aBitmap, true);
     SAL_WARN_IF(!bSuccess, "vcl.layout", "Unable to load " << sFileName
-        << " from theme " << sCurrentSymbolsStyle);
+        << " from theme " << sIconTheme);
     return Image(aBitmap);
 }
 
diff --git a/vcl/source/gdi/bitmapex.cxx b/vcl/source/gdi/bitmapex.cxx
index a8b287724478..0e9cd05d7abc 100644
--- a/vcl/source/gdi/bitmapex.cxx
+++ b/vcl/source/gdi/bitmapex.cxx
@@ -96,9 +96,9 @@ BitmapEx::BitmapEx( const ResId& rResId ) :
     pResMgr->ReadLong();
 
     const OUString aFileName( pResMgr->ReadString() );
-    OUString aCurrentSymbolsStyle = Application::GetSettings().GetStyleSettings().GetCurrentSymbolsStyleName();
+    OUString aIconTheme = Application::GetSettings().GetStyleSettings().DetermineIconTheme();
 
-    if( !aImageTree->loadImage( aFileName, aCurrentSymbolsStyle, *this, true ) )
+    if( !aImageTree->loadImage( aFileName, aIconTheme, *this, true ) )
     {
 #ifdef DBG_UTIL
         OStringBuffer aErrorStr(
diff --git a/vcl/source/gdi/image.cxx b/vcl/source/gdi/image.cxx
index 8400942651a5..77dd01ee1fdb 100644
--- a/vcl/source/gdi/image.cxx
+++ b/vcl/source/gdi/image.cxx
@@ -379,7 +379,7 @@ void ImageAryData::Load(const OUString &rPrefix)
 {
     static ImplImageTreeSingletonRef aImageTree;
 
-    OUString aSymbolsStyle = Application::GetSettings().GetStyleSettings().GetCurrentSymbolsStyleName();
+    OUString aIconTheme = Application::GetSettings().GetStyleSettings().DetermineIconTheme();
 
     BitmapEx aBmpEx;
 
@@ -388,7 +388,7 @@ void ImageAryData::Load(const OUString &rPrefix)
 #if OSL_DEBUG_LEVEL > 0
     bool bSuccess =
 #endif
-        aImageTree->loadImage( aFileName, aSymbolsStyle, maBitmapEx, true );
+        aImageTree->loadImage( aFileName, aIconTheme, maBitmapEx, true );
 #if OSL_DEBUG_LEVEL > 0
     if ( !bSuccess )
     {
diff --git a/vcl/source/gdi/imagerepository.cxx b/vcl/source/gdi/imagerepository.cxx
index 43ee86e58764..f83981ecd22e 100644
--- a/vcl/source/gdi/imagerepository.cxx
+++ b/vcl/source/gdi/imagerepository.cxx
@@ -28,17 +28,17 @@ namespace vcl
 {
     bool ImageRepository::loadImage( const OUString& _rName, BitmapEx& _out_rImage, bool _bSearchLanguageDependent, bool loadMissing )
     {
-        OUString sCurrentSymbolsStyle = Application::GetSettings().GetStyleSettings().GetCurrentSymbolsStyleName();
+        OUString sIconTheme = Application::GetSettings().GetStyleSettings().DetermineIconTheme();
 
         ImplImageTreeSingletonRef aImplImageTree;
-        return aImplImageTree->loadImage( _rName, sCurrentSymbolsStyle, _out_rImage, _bSearchLanguageDependent, loadMissing );
+        return aImplImageTree->loadImage( _rName, sIconTheme, _out_rImage, _bSearchLanguageDependent, loadMissing );
     }
 
     bool ImageRepository::loadDefaultImage( BitmapEx& _out_rImage)
     {
-        OUString sCurrentSymbolsStyle = Application::GetSettings().GetStyleSettings().GetCurrentSymbolsStyleName();
+        OUString sIconTheme = Application::GetSettings().GetStyleSettings().DetermineIconTheme();
         ImplImageTreeSingletonRef aImplImageTree;
-        return aImplImageTree->loadDefaultImage( sCurrentSymbolsStyle,_out_rImage);
+        return aImplImageTree->loadDefaultImage( sIconTheme,_out_rImage);
     }
 
 } // namespace vcl
diff --git a/vcl/source/window/toolbox2.cxx b/vcl/source/window/toolbox2.cxx
index 9c5667a96209..72039beca9bc 100644
--- a/vcl/source/window/toolbox2.cxx
+++ b/vcl/source/window/toolbox2.cxx
@@ -32,6 +32,7 @@
 #include <vcl/menu.hxx>
 #include <vcl/ImageListProvider.hxx>
 #include <vcl/settings.hxx>
+#include <vcl/IconThemeInfo.hxx>
 
 #include <svdata.hxx>
 #include <brdwin.hxx>
@@ -995,42 +996,19 @@ ToolBoxButtonSize ToolBox::GetToolboxButtonSize() const
 
 // -----------------------------------------------------------------------
 
-const Size& ToolBox::GetDefaultImageSize(bool bLarge)
+/*static*/ Size
+ToolBox::GetDefaultImageSize(bool bLarge)
 {
-    static Size aSmallButtonSize( TB_SMALLIMAGESIZE, TB_SMALLIMAGESIZE );
-
-    static sal_uLong s_nSymbolsStyle = STYLE_SYMBOLS_DEFAULT;
-    static Size aLargeButtonSize( TB_LARGEIMAGESIZE, TB_LARGEIMAGESIZE );
-
-    sal_uLong nSymbolsStyle = Application::GetSettings().GetStyleSettings().GetCurrentSymbolsStyle();
-    if ( s_nSymbolsStyle != nSymbolsStyle )
-    {
-        s_nSymbolsStyle = nSymbolsStyle;
-        switch ( nSymbolsStyle )
-        {
-            case STYLE_SYMBOLS_TANGO:
-            case STYLE_SYMBOLS_TANGO_TESTING:
-            case STYLE_SYMBOLS_HUMAN:
-            case STYLE_SYMBOLS_INDUSTRIAL:
-                aLargeButtonSize = Size( TB_LARGEIMAGESIZE_INDUSTRIAL, TB_LARGEIMAGESIZE_INDUSTRIAL );
-                break;
-            case STYLE_SYMBOLS_CRYSTAL:
-                aLargeButtonSize = Size( TB_LARGEIMAGESIZE_CRYSTAL, TB_LARGEIMAGESIZE_CRYSTAL );
-                break;
-            case STYLE_SYMBOLS_OXYGEN:
-                aLargeButtonSize = Size( TB_LARGEIMAGESIZE_OXYGEN, TB_LARGEIMAGESIZE_OXYGEN );
-                break;
-            case STYLE_SYMBOLS_DEFAULT: // galaxy
-            case STYLE_SYMBOLS_HICONTRAST:
-            default:
-                aLargeButtonSize = Size( TB_LARGEIMAGESIZE, TB_LARGEIMAGESIZE );
-        }
+    const long TB_SMALLIMAGESIZE = 16;
+    if (!bLarge) {
+        return Size(TB_SMALLIMAGESIZE, TB_SMALLIMAGESIZE);
     }
 
-    return bLarge ? aLargeButtonSize : aSmallButtonSize;
+    OUString iconTheme = Application::GetSettings().GetStyleSettings().DetermineIconTheme();
+    return vcl::IconThemeInfo::SizeByThemeName(iconTheme);
 }
 
-const Size& ToolBox::GetDefaultImageSize() const
+Size ToolBox::GetDefaultImageSize() const
 {
     return GetDefaultImageSize( GetToolboxButtonSize() == TOOLBOX_BUTTONSIZE_LARGE );
 }
diff --git a/vcl/source/window/window.cxx b/vcl/source/window/window.cxx
index ed057f78fcd5..8a3f00645e13 100644
--- a/vcl/source/window/window.cxx
+++ b/vcl/source/window/window.cxx
@@ -661,7 +661,6 @@ void Window::ImplUpdateGlobalSettings( AllSettings& rSettings, bool bCallHdl )
     {
         aStyleSettings = rSettings.GetStyleSettings();
         aStyleSettings.SetHighContrastMode( true );
-        aStyleSettings.SetSymbolsStyle( STYLE_SYMBOLS_HICONTRAST );
         rSettings.SetStyleSettings( aStyleSettings );
     }
 
diff --git a/vcl/unx/gtk/gdi/salnativewidgets-gtk.cxx b/vcl/unx/gtk/gdi/salnativewidgets-gtk.cxx
index 6056a84e0f7a..4ae67fef72a2 100644
--- a/vcl/unx/gtk/gdi/salnativewidgets-gtk.cxx
+++ b/vcl/unx/gtk/gdi/salnativewidgets-gtk.cxx
@@ -4082,7 +4082,7 @@ void GtkSalGraphics::updateSettings( AllSettings& rSettings )
     // preferred icon style
     gchar* pIconThemeName = NULL;
     g_object_get( pSettings, "gtk-icon-theme-name", &pIconThemeName, (char *)NULL );
-    aStyleSet.SetPreferredSymbolsStyleName( OUString::createFromAscii( pIconThemeName ) );
+    aStyleSet.SetPreferredIconTheme( OUString::createFromAscii( pIconThemeName ) );
     g_free( pIconThemeName );
 
     aStyleSet.SetToolbarIconSize( STYLE_TOOLBAR_ICONSIZE_LARGE );
diff --git a/vcl/unx/kde/salnativewidgets-kde.cxx b/vcl/unx/kde/salnativewidgets-kde.cxx
index 86096366d563..378930a3202b 100644
--- a/vcl/unx/kde/salnativewidgets-kde.cxx
+++ b/vcl/unx/kde/salnativewidgets-kde.cxx
@@ -1884,7 +1884,7 @@ void KDESalFrame::UpdateSettings( AllSettings& rSettings )
 
         pKey = "Theme";
         if ( pConfig->hasKey( pKey ) )
-            aStyleSettings.SetPreferredSymbolsStyleName( readEntryUntranslated( pConfig, pKey ) );
+            aStyleSettings.SetPreferredIconTheme( readEntryUntranslated( pConfig, pKey ) );
     }
 
     // General settings