WIP

DevConsole/devconsole.h

@@ -0,0 +1,100 @@
+/*
+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/.
+*/
+
+#pragma once
+
+#include <string>
+#include <vector>
+#include <functional>
+#include <unordered_map>
+#include <deque>
+
+#include "application/uilayer.h"
+
+struct ImGuiInputTextCallbackData;
+
+namespace dev {
+
+// Parsed command arguments — name of the command is args[0]
+using args_t = std::vector<std::string>;
+
+// Handler signature: receives all tokens including the command name at [0]
+using command_handler_t = std::function<void(const args_t &)>;
+
+struct console_command {
+    std::string name;
+    std::string description;
+    command_handler_t handler;
+};
+
+// -----------------------------------------------------------------------
+// console_panel
+//   Inherits from ui_panel. Embed as a member in any ui_layer subclass,
+//   then call add_external_panel() to register it.
+//
+//   Toggle visibility with the backtick / grave-accent key (`) handled
+//   from ui_layer::on_key().
+//
+//   Register commands from anywhere via the static global instance:
+//       dev::Console.register_command("name", "desc", handler);
+// -----------------------------------------------------------------------
+class console_panel : public ui_panel {
+public:
+    console_panel();
+
+    void render() override;
+    void render_contents() override;
+
+    // Print a line to the console output
+    void print(const std::string &text, glm::vec4 color = {0.9f, 0.9f, 0.9f, 1.0f});
+    void print_info(const std::string &text);
+    void print_ok(const std::string &text);
+    void print_error(const std::string &text);
+    void print_warn(const std::string &text);
+
+    // Register a new command. Duplicate names overwrite previous.
+    void register_command(std::string name, std::string description, command_handler_t handler);
+
+    // Execute a raw input string (tokenises, looks up, calls handler)
+    void execute(const std::string &input);
+
+    // Focus the input field next frame
+    void focus_input() { m_want_focus = true; }
+
+private:
+    struct log_entry {
+        std::string text;
+        glm::vec4   color;
+    };
+
+    void execute_command(const std::string &name, const args_t &args);
+    std::vector<std::string> completions_for(const std::string &prefix) const;
+
+    // ImGui InputText callback — used for history and tab-completion
+    static int input_callback(ImGuiInputTextCallbackData *data);
+
+    std::unordered_map<std::string, console_command> m_commands;
+    std::deque<log_entry>      m_log;
+    std::deque<std::string>    m_history;   // previously executed lines
+    int                        m_history_pos { -1 }; // -1 = new input
+    char                       m_input_buf[512] {};
+    bool                       m_scroll_to_bottom { false };
+    bool                       m_want_focus { false };
+
+    static constexpr std::size_t MAX_LOG   = 1024;
+    static constexpr std::size_t MAX_HIST  = 128;
+
+    // Built-in commands registered in the constructor
+    void register_builtins();
+};
+
+// Global singleton — accessible from anywhere after the header is included
+extern console_panel Console;
+
+} // namespace dev