chore: structured src/gui, run clang-format

src/gui/platform/linux/font_loader_linux.cpp

@@ -0,0 +1,95 @@
+#ifdef __linux__
+
+#include "core/config/config.hpp"
+#include "gui/platform/font_loader.hpp"
+#include "imgui_internal.h"
+#include <algorithm>
+#include <fontconfig/fontconfig.h>
+#include <imgui.h>
+
+std::string font_loader::find_font_linux(const char *font_name)
+{
+    FcInit();
+
+    FcPattern *pattern = FcNameParse(reinterpret_cast<const FcChar8 *>(font_name));
+    if (!pattern)
+        return {};
+
+    FcConfigSubstitute(nullptr, pattern, FcMatchPattern);
+    FcDefaultSubstitute(pattern);
+
+    FcResult result;
+    FcPattern *match = FcFontMatch(nullptr, pattern, &result);
+
+    std::string out;
+
+    if (match)
+    {
+        FcChar8 *file = nullptr;
+        if (FcPatternGetString(match, FC_FILE, 0, &file) == FcResultMatch)
+            out = reinterpret_cast<const char *>(file);
+
+        FcPatternDestroy(match);
+    }
+
+    FcPatternDestroy(pattern);
+    return out;
+}
+
+std::string font_loader::find_font_path(const char *font_name)
+{
+    return find_font_linux(font_name);
+}
+
+ImFont *font_loader::load_font(const char *font_name, float size_px)
+{
+    std::string path = find_font_path(font_name);
+    if (path.empty())
+        return nullptr;
+
+    float scale = ImGui::GetIO().DisplayFramebufferScale.y;
+    return ImGui::GetIO().Fonts->AddFontFromFileTTF(path.c_str(), size_px * scale);
+}
+
+void font_loader::push_default_font()
+{
+    ImGui::PushFont(ImGui::GetDefaultFont(), clrsync::core::config::instance().font_size());
+}
+
+void font_loader::pop_font()
+{
+    ImGui::PopFont();
+}
+
+std::vector<std::string> font_loader::get_system_fonts()
+{
+    std::vector<std::string> fonts;
+
+    FcInit();
+    FcPattern *pattern = FcPatternCreate();
+    FcObjectSet *os = FcObjectSetBuild(FC_FAMILY, nullptr);
+    FcFontSet *fs = FcFontList(nullptr, pattern, os);
+
+    if (fs)
+    {
+        for (int i = 0; i < fs->nfont; i++)
+        {
+            FcChar8 *family = nullptr;
+            if (FcPatternGetString(fs->fonts[i], FC_FAMILY, 0, &family) == FcResultMatch)
+            {
+                std::string font_name = reinterpret_cast<const char *>(family);
+                if (std::find(fonts.begin(), fonts.end(), font_name) == fonts.end())
+                    fonts.push_back(font_name);
+            }
+        }
+        FcFontSetDestroy(fs);
+    }
+
+    FcObjectSetDestroy(os);
+    FcPatternDestroy(pattern);
+
+    std::sort(fonts.begin(), fonts.end());
+    return fonts;
+}
+
+#endif