chore: split color_scheme_editor

src/gui/preview_renderer.cpp

@@ -0,0 +1,152 @@
+#include "preview_renderer.hpp"
+#include "theme_applier.hpp"
+#include "imgui.h"
+#include <algorithm>
+
+preview_renderer::preview_renderer()
+{
+    m_editor.SetLanguageDefinition(TextEditor::LanguageDefinition::CPlusPlus());
+    m_editor.SetText(R"(#include <iostream>
+#include <string>
+#include <vector>
+#include <filesystem>
+#include <cstdlib>
+
+namespace fs = std::filesystem;
+
+// Expands ~ to the user's home directory
+std::string expand_user(const std::string &path)
+{
+    if (path.empty()) return "";
+
+    std::string result;
+    if (path[0] == '~')
+    {
+#ifdef _WIN32
+        const char* home = std::getenv("USERPROFILE");
+#else
+        const char* home = std::getenv("HOME");
+#endif
+        result = home ? std::string(home) : "~";
+        result += path.substr(1);
+    }
+    else
+    {
+        result = path;
+    }
+
+    return result;
+}
+
+// Lists all files in a directory
+std::vector<std::string> list_files(const std::string &dir_path)
+{
+    std::vector<std::string> files;
+    try
+    {
+        for (const auto &entry : fs::directory_iterator(dir_path))
+        {
+            if (entry.is_regular_file())
+                files.push_back(entry.path().string());
+        }
+    }
+    catch (const std::exception &e)
+    {
+        std::cerr << "Error: " << e.what() << std::endl;
+    }
+    return files;
+}
+
+int main()
+{
+    std::string path = expand_user("~/Documents");
+    std::cout << "Listing files in: " << path << std::endl;
+
+    auto files = list_files(path);
+    for (const auto &f : files)
+        std::cout << "  " << f << std::endl;
+
+    return 0;
+})");
+
+    m_editor.SetShowWhitespaces(false);
+}
+
+void preview_renderer::apply_palette(const clrsync::core::palette& palette)
+{
+    theme_applier::apply_to_editor(m_editor, palette);
+}
+
+void preview_renderer::render_code_preview()
+{
+    const float avail_height = ImGui::GetContentRegionAvail().y;
+    const float code_preview_height = std::max(250.0f, avail_height * 0.55f);
+
+    ImGui::Text("Code Editor:");
+    m_editor.Render("##CodeEditor", ImVec2(0, code_preview_height), true);
+}
+
+void preview_renderer::render_terminal_preview(const clrsync::core::palette& current)
+{
+    auto get_color = [&](const std::string &key) -> ImVec4 {
+        auto it = current.colors().find(key);
+        if (it != current.colors().end())
+        {
+            const auto &col = it->second;
+            const uint32_t hex = col.hex();
+            return {((hex >> 24) & 0xFF) / 255.0f, ((hex >> 16) & 0xFF) / 255.0f,
+                    ((hex >> 8) & 0xFF) / 255.0f, ((hex) & 0xFF) / 255.0f};
+        }
+        return {1, 1, 1, 1};
+    };
+
+    const ImVec4 editor_bg = get_color("editor_background");
+    const ImVec4 fg = get_color("foreground");
+    const ImVec4 accent = get_color("accent");
+    const ImVec4 border = get_color("border");
+    const ImVec4 error = get_color("error");
+    const ImVec4 warning = get_color("warning");
+    const ImVec4 success = get_color("success");
+    const ImVec4 info = get_color("info");
+
+    ImGui::Spacing();
+    ImGui::Text("Terminal Preview:");
+    
+    ImGui::PushStyleColor(ImGuiCol_ChildBg, editor_bg);
+    ImGui::BeginChild("TerminalPreview", ImVec2(0, 0), true);
+    ImGui::PushStyleColor(ImGuiCol_Border, border);
+
+    struct term_line
+    {
+        const char *text{};
+        ImVec4 col;
+    };
+    term_line term_lines[] = {
+        {"$ ls -la", fg},
+        {"drwxr-xr-x 5 user group 4096 Dec  2 10:30 .", accent},
+        {"Build successful", success},
+        {"Error: file not found", error},
+        {"Warning: low disk space", warning},
+        {"Info: update available", info},
+    };
+
+    for (auto &[text, col] : term_lines)
+    {
+        ImGui::TextColored(col, "%s", text);
+    }
+
+    ImGui::PopStyleColor(2);
+    ImGui::EndChild();
+}
+
+void preview_renderer::render(const clrsync::core::palette& current)
+{
+    if (current.colors().empty())
+    {
+        ImGui::TextColored(ImVec4(1.0f, 0.3f, 0.3f, 1.0f), "Current palette is empty");
+        return;
+    }
+
+    render_code_preview();
+    render_terminal_preview(current);
+}