From d4a0f32dd01ce5d0c1f8cecb4a293dc3221a9b39 Mon Sep 17 00:00:00 2001
From: Leon Styhre <leon@leonstyhre.com>
Date: Sat, 31 Aug 2024 12:52:20 +0200
Subject: [PATCH] Added support for using language variables in the theme
 configuration

---
 es-core/src/ThemeData.cpp | 46 +++++++++++++++++++++++++++++++++++++++
 es-core/src/ThemeData.h   |  2 ++
 2 files changed, 48 insertions(+)

diff --git a/es-core/src/ThemeData.cpp b/es-core/src/ThemeData.cpp
index ae6abefcb..c0915e712 100644
--- a/es-core/src/ThemeData.cpp
+++ b/es-core/src/ThemeData.cpp
@@ -684,6 +684,9 @@ void ThemeData::loadFile(const std::map<std::string, std::string>& sysDataMap,
     }
 
     if (sCurrentTheme->second.capabilities.languages.size() > 0) {
+        for (auto& language : sCurrentTheme->second.capabilities.languages)
+            mLanguages.emplace_back(language);
+
         std::string langSetting {Settings::getInstance()->getString("ThemeLanguage")};
         if (langSetting == "automatic")
             langSetting = Utils::Localization::sCurrentLocale;
@@ -715,6 +718,7 @@ void ThemeData::loadFile(const std::map<std::string, std::string>& sysDataMap,
     parseVariables(root);
     parseColorSchemes(root);
     parseFontSizes(root);
+    parseLanguages(root);
     parseIncludes(root);
     parseViews(root);
     if (root.child("feature") != nullptr)
@@ -1701,6 +1705,7 @@ void ThemeData::parseIncludes(const pugi::xml_node& root)
         parseVariables(theme);
         parseColorSchemes(theme);
         parseFontSizes(theme);
+        parseLanguages(theme);
         parseIncludes(theme);
         parseViews(theme);
         if (theme.child("feature") != nullptr)
@@ -1751,6 +1756,7 @@ void ThemeData::parseVariants(const pugi::xml_node& root)
                 parseVariables(node);
                 parseColorSchemes(node);
                 parseFontSizes(node);
+                parseLanguages(node);
                 parseIncludes(node);
                 parseViews(node);
                 parseAspectRatios(node);
@@ -1873,6 +1879,7 @@ void ThemeData::parseAspectRatios(const pugi::xml_node& root)
                 parseVariables(node);
                 parseColorSchemes(node);
                 parseFontSizes(node);
+                parseLanguages(node);
                 parseIncludes(node);
                 parseViews(node);
             }
@@ -1901,6 +1908,45 @@ void ThemeData::parseTransitions(const pugi::xml_node& root)
     }
 }
 
+void ThemeData::parseLanguages(const pugi::xml_node& root)
+{
+    if (sCurrentTheme == sThemes.end())
+        return;
+
+    if (sThemeLanguage == "")
+        return;
+
+    ThemeException error;
+    error << "ThemeData::parseLanguages(): ";
+    error.setFiles(mPaths);
+
+    for (pugi::xml_node node {root.child("language")}; node; node = node.next_sibling("language")) {
+        if (!node.attribute("name"))
+            throw error << ": <language> tag missing \"name\" attribute";
+
+        const std::string delim {" \t\r\n,"};
+        const std::string nameAttr {node.attribute("name").as_string()};
+        size_t prevOff {nameAttr.find_first_not_of(delim, 0)};
+        size_t off {nameAttr.find_first_of(delim, prevOff)};
+        std::string viewKey;
+        while (off != std::string::npos || prevOff != std::string::npos) {
+            viewKey = nameAttr.substr(prevOff, off - prevOff);
+            prevOff = nameAttr.find_first_not_of(delim, off);
+            off = nameAttr.find_first_of(delim, prevOff);
+
+            if (std::find(mLanguages.cbegin(), mLanguages.cend(), viewKey) == mLanguages.cend()) {
+                throw error << ": <language> value \"" << viewKey
+                            << "\" is not defined in capabilities.xml";
+            }
+
+            if (sThemeLanguage == viewKey) {
+                parseVariables(node);
+                parseIncludes(node);
+            }
+        }
+    }
+}
+
 void ThemeData::parseVariables(const pugi::xml_node& root)
 {
     ThemeException error;
diff --git a/es-core/src/ThemeData.h b/es-core/src/ThemeData.h
index e033b96db..62ca1c9e3 100644
--- a/es-core/src/ThemeData.h
+++ b/es-core/src/ThemeData.h
@@ -256,6 +256,7 @@ private:
     void parseVariants(const pugi::xml_node& root);
     void parseColorSchemes(const pugi::xml_node& root);
     void parseFontSizes(const pugi::xml_node& root);
+    void parseLanguages(const pugi::xml_node& root);
     void parseAspectRatios(const pugi::xml_node& root);
     void parseTransitions(const pugi::xml_node& root);
     void parseVariables(const pugi::xml_node& root);
@@ -292,6 +293,7 @@ private:
     std::vector<std::string> mVariants;
     std::vector<std::string> mColorSchemes;
     std::vector<std::string> mFontSizes;
+    std::vector<std::string> mLanguages;
     std::string mSelectedVariant;
     std::string mOverrideVariant;
     std::string mSelectedColorScheme;