Add version control editor plugin

Provides the editor with all the VCS GUI and extracts the data from the
upcoming VCS API to cater to the project with VCS interaction.

2 files changed, 681 insertions, 0 deletions

diff --git a/editor/plugins/version_control_editor_plugin.cpp b/editor/plugins/version_control_editor_plugin.cpp
new file mode 100644
index 0000000000..d2873fb8f1
--- /dev/null
+++ b/editor/plugins/version_control_editor_plugin.cpp
@@ -0,0 +1,565 @@
+#include "version_control_editor_plugin.h"
+#include "core/script_language.h"
+#include "editor/editor_file_system.h"
+#include "editor/editor_node.h"
+
+VersionControlEditorPlugin *VersionControlEditorPlugin::singleton = NULL;
+
+void VersionControlEditorPlugin::_bind_methods() {
+
+	ClassDB::bind_method(D_METHOD("_selected_a_vcs"), &VersionControlEditorPlugin::_selected_a_vcs);
+	ClassDB::bind_method(D_METHOD("_initialize_vcs"), &VersionControlEditorPlugin::_initialize_vcs);
+	ClassDB::bind_method(D_METHOD("_send_commit_msg"), &VersionControlEditorPlugin::_send_commit_msg);
+	ClassDB::bind_method(D_METHOD("_refresh_stage_area"), &VersionControlEditorPlugin::_refresh_stage_area);
+	ClassDB::bind_method(D_METHOD("_stage_all"), &VersionControlEditorPlugin::_stage_all);
+	ClassDB::bind_method(D_METHOD("_stage_selected"), &VersionControlEditorPlugin::_stage_selected);
+	ClassDB::bind_method(D_METHOD("_view_file_diff"), &VersionControlEditorPlugin::_view_file_diff);
+	ClassDB::bind_method(D_METHOD("_refresh_file_diff"), &VersionControlEditorPlugin::_refresh_file_diff);
+	ClassDB::bind_method(D_METHOD("popup_vcs_set_up_dialog"), &VersionControlEditorPlugin::popup_vcs_set_up_dialog);
+
+	// Used to track the status of files in the staging area
+	BIND_ENUM_CONSTANT(CHANGE_TYPE_NEW);
+	BIND_ENUM_CONSTANT(CHANGE_TYPE_MODIFIED);
+	BIND_ENUM_CONSTANT(CHANGE_TYPE_RENAMED);
+	BIND_ENUM_CONSTANT(CHANGE_TYPE_DELETED);
+	BIND_ENUM_CONSTANT(CHANGE_TYPE_TYPECHANGE);
+}
+
+void VersionControlEditorPlugin::_selected_a_vcs(int p_id) {
+
+	List<StringName> available_addons = get_available_vcs_names();
+	const StringName selected_vcs = set_up_choice->get_item_text(p_id);
+
+	if (available_addons.find(selected_vcs) != NULL) {
+
+		set_up_init_button->set_disabled(false);
+	} else {
+
+		set_up_init_button->set_disabled(true);
+	}
+}
+
+void VersionControlEditorPlugin::_populate_available_vcs_names() {
+
+	static bool called = false;
+
+	if (!called) {
+
+		set_up_choice->add_item("Select an available VCS");
+
+		fetch_available_vcs_addon_names();
+		List<StringName> available_addons = get_available_vcs_names();
+		for (int i = 0; i < available_addons.size(); i++) {
+
+			set_up_choice->add_item(available_addons[i]);
+		}
+
+		called = true;
+	}
+}
+
+VersionControlEditorPlugin *VersionControlEditorPlugin::get_singleton() {
+
+	return singleton ? singleton : memnew(VersionControlEditorPlugin);
+}
+
+void VersionControlEditorPlugin::popup_vcs_set_up_dialog(const Control *p_gui_base) {
+
+	Size2 popup_size = Size2(400, 100);
+	Size2 window_size = p_gui_base->get_viewport_rect().size;
+	popup_size.x = MIN(window_size.x * 0.5, popup_size.x);
+	popup_size.y = MIN(window_size.y * 0.5, popup_size.y);
+
+	if (get_is_vcs_intialized()) {
+
+		set_up_init_button->set_disabled(true);
+	}
+
+	_populate_available_vcs_names();
+
+	set_up_dialog->popup_centered_clamped(popup_size * EDSCALE);
+}
+
+void VersionControlEditorPlugin::_initialize_vcs() {
+
+	register_editor();
+
+	if (EditorVCSInterface::get_singleton()) {
+
+		ERR_EXPLAIN(EditorVCSInterface::get_singleton()->get_vcs_name() + " is already active");
+		return;
+	}
+
+	int id = set_up_choice->get_selected_id();
+	String selected_addon = set_up_choice->get_item_text(id);
+
+	String path = ScriptServer::get_global_class_path(selected_addon);
+	Ref<Script> script = ResourceLoader::load(path);
+	if (!script.is_valid()) {
+
+		ERR_EXPLAIN("VCS Addon path is invalid");
+	}
+
+	EditorVCSInterface *vcs_interface = memnew(EditorVCSInterface);
+	ScriptInstance *addon_script_instance = script->instance_create(vcs_interface);
+	if (!addon_script_instance) {
+
+		ERR_FAIL_NULL(addon_script_instance);
+		return;
+	}
+
+	// The addon is attached as a script to the VCS interface as a proxy end-point
+	vcs_interface->set_script_and_instance(script.get_ref_ptr(), addon_script_instance);
+
+	EditorVCSInterface::set_singleton(vcs_interface);
+	EditorFileSystem::get_singleton()->connect("filesystem_changed", this, "_refresh_stage_area");
+
+	String res_dir = OS::get_singleton()->get_resource_dir();
+	if (!EditorVCSInterface::get_singleton()->initialize(res_dir)) {
+
+		ERR_EXPLAIN("VCS was not initialized");
+	}
+
+	_refresh_stage_area();
+}
+
+void VersionControlEditorPlugin::_send_commit_msg() {
+
+	String msg = commit_message->get_text();
+	if (msg == "") {
+
+		commit_status->set_text(TTR("No commit message was provided"));
+		return;
+	}
+
+	if (EditorVCSInterface::get_singleton()) {
+
+		if (staged_files_count == 0) {
+
+			commit_status->set_text(TTR("No files added to stage"));
+			return;
+		}
+
+		EditorVCSInterface::get_singleton()->commit(msg);
+
+		commit_message->set_text("");
+		version_control_dock_button->set_pressed(false);
+	} else {
+
+		WARN_PRINT("No VCS addon is initialized. Select a Version Control Addon from Project menu");
+	}
+
+	_update_commit_status();
+	_refresh_stage_area();
+	_clear_file_diff();
+}
+
+void VersionControlEditorPlugin::_refresh_stage_area() {
+
+	if (EditorVCSInterface::get_singleton()) {
+
+		staged_files_count = 0;
+		clear_stage_area();
+
+		Dictionary modified_file_paths = EditorVCSInterface::get_singleton()->get_modified_files_data();
+		String file_path;
+		for (int i = 0; i < modified_file_paths.size(); i++) {
+
+			file_path = modified_file_paths.get_key_at_index(i);
+			TreeItem *found = stage_files->search_item_text(file_path, 0, true);
+			if (!found) {
+
+				ChangeType change_index = (ChangeType)(int)modified_file_paths.get_value_at_index(i);
+				String change_text = file_path + " (" + change_type_to_strings[change_index] + ")";
+				Color &change_color = change_type_to_color[change_index];
+				TreeItem *new_item = stage_files->create_item(stage_files->get_root());
+				new_item->set_cell_mode(0, TreeItem::CELL_MODE_CHECK);
+				new_item->set_text(0, change_text);
+				new_item->set_metadata(0, file_path);
+				new_item->set_custom_color(0, change_color);
+				new_item->set_checked(0, true);
+				new_item->set_editable(0, true);
+			} else {
+
+				if (found->get_metadata(0) == diff_file_name->get_text()) {
+
+					_refresh_file_diff();
+				}
+			}
+			commit_status->set_text("New changes detected");
+		}
+	} else {
+
+		WARN_PRINT("No VCS addon is initialized. Select a Version Control Addon from Project menu.")
+	}
+}
+
+void VersionControlEditorPlugin::_stage_selected() {
+
+	if (!EditorVCSInterface::get_singleton()) {
+
+		WARN_PRINT("No VCS addon is initialized. Select a Version Control Addon from Project menu");
+		return;
+	}
+
+	staged_files_count = 0;
+	TreeItem *root = stage_files->get_root();
+	if (root) {
+
+		TreeItem *file_entry = root->get_children();
+		while (file_entry) {
+
+			if (file_entry->is_checked(0)) {
+
+				EditorVCSInterface::get_singleton()->stage_file(file_entry->get_metadata(0));
+				file_entry->set_icon_modulate(0, EditorNode::get_singleton()->get_gui_base()->get_color("success_color", "Editor"));
+				staged_files_count++;
+			} else {
+
+				EditorVCSInterface::get_singleton()->unstage_file(file_entry->get_metadata(0));
+				file_entry->set_icon_modulate(0, EditorNode::get_singleton()->get_gui_base()->get_color("error_color", "Editor"));
+			}
+
+			file_entry = file_entry->get_next();
+		}
+	}
+
+	_update_stage_status();
+}
+
+void VersionControlEditorPlugin::_stage_all() {
+
+	if (!EditorVCSInterface::get_singleton()) {
+
+		WARN_PRINT("No VCS addon is initialized. Select a Version Control Addon from Project menu");
+		return;
+	}
+
+	staged_files_count = 0;
+	TreeItem *root = stage_files->get_root();
+	if (root) {
+
+		TreeItem *file_entry = root->get_children();
+		while (file_entry) {
+
+			EditorVCSInterface::get_singleton()->stage_file(file_entry->get_metadata(0));
+			file_entry->set_icon_modulate(0, EditorNode::get_singleton()->get_gui_base()->get_color("success_color", "Editor"));
+			file_entry->set_checked(0, true);
+			staged_files_count++;
+
+			file_entry = file_entry->get_next();
+		}
+	}
+
+	_update_stage_status();
+}
+
+void VersionControlEditorPlugin::_view_file_diff() {
+
+	version_control_dock_button->set_pressed(true);
+
+	String file_path = stage_files->get_selected()->get_metadata(0);
+
+	_display_file_diff(file_path);
+}
+
+void VersionControlEditorPlugin::_display_file_diff(String p_file_path) {
+
+	Array diff_content = EditorVCSInterface::get_singleton()->get_file_diff(p_file_path);
+
+	diff_file_name->set_text(p_file_path);
+
+	diff->clear();
+	diff->push_font(EditorNode::get_singleton()->get_gui_base()->get_font("source", "EditorFonts"));
+	for (int i = 0; i < diff_content.size(); i++) {
+
+		Dictionary line_result = diff_content[i];
+
+		if (line_result["status"] == "+") {
+
+			diff->push_color(EditorNode::get_singleton()->get_gui_base()->get_color("success_color", "Editor"));
+		} else if (line_result["status"] == "-") {
+
+			diff->push_color(EditorNode::get_singleton()->get_gui_base()->get_color("error_color", "Editor"));
+		} else {
+
+			diff->push_color(EditorNode::get_singleton()->get_gui_base()->get_color("font_color", "Label"));
+		}
+
+		diff->add_text((String)line_result["content"]);
+
+		diff->pop();
+	}
+	diff->pop();
+}
+
+void VersionControlEditorPlugin::_refresh_file_diff() {
+
+	String open_file = diff_file_name->get_text();
+	if (open_file != "") {
+
+		_display_file_diff(diff_file_name->get_text());
+	}
+}
+
+void VersionControlEditorPlugin::_clear_file_diff() {
+
+	diff->clear();
+	diff_file_name->set_text("");
+	version_control_dock_button->set_pressed(false);
+}
+
+void VersionControlEditorPlugin::_update_stage_status() {
+
+	String status;
+	if (staged_files_count == 1) {
+
+		status = "Stage contains 1 file";
+	} else {
+
+		status = "Stage contains " + String::num_int64(staged_files_count) + " files";
+	}
+	commit_status->set_text(status);
+}
+
+void VersionControlEditorPlugin::_update_commit_status() {
+
+	String status;
+	if (staged_files_count == 1) {
+
+		status = "Committed 1 file";
+	} else {
+
+		status = "Committed " + String::num_int64(staged_files_count) + " files ";
+	}
+	commit_status->set_text(status);
+	staged_files_count = 0;
+}
+
+void VersionControlEditorPlugin::register_editor() {
+
+	if (!EditorVCSInterface::get_singleton()) {
+
+		EditorNode::get_singleton()->add_control_to_dock(EditorNode::DOCK_SLOT_RIGHT_UL, version_commit_dock);
+		TabContainer *dock_vbc = (TabContainer *)version_commit_dock->get_parent_control();
+		dock_vbc->set_tab_title(version_commit_dock->get_index(), TTR("Commit"));
+
+		ToolButton *vc = EditorNode::get_singleton()->add_bottom_panel_item(TTR("Version Control"), version_control_dock);
+		set_version_control_tool_button(vc);
+	}
+}
+
+void VersionControlEditorPlugin::fetch_available_vcs_addon_names() {
+
+	ScriptServer::get_global_class_list(&available_addons);
+}
+
+void VersionControlEditorPlugin::clear_stage_area() {
+
+	stage_files->get_root()->clear_children();
+}
+
+void VersionControlEditorPlugin::shut_down() {
+
+	if (EditorVCSInterface::get_singleton()) {
+
+		EditorFileSystem::get_singleton()->disconnect("filesystem_changed", this, "_refresh_stage_area");
+		EditorVCSInterface::get_singleton()->shut_down();
+		memdelete(EditorVCSInterface::get_singleton());
+		EditorVCSInterface::set_singleton(NULL);
+
+		EditorNode::get_singleton()->remove_control_from_dock(version_commit_dock);
+		EditorNode::get_singleton()->remove_bottom_panel_item(version_control_dock);
+	}
+}
+
+bool VersionControlEditorPlugin::get_is_vcs_intialized() const {
+
+	return EditorVCSInterface::get_singleton() ? EditorVCSInterface::get_singleton()->get_is_vcs_intialized() : false;
+}
+
+const String VersionControlEditorPlugin::get_vcs_name() const {
+
+	return EditorVCSInterface::get_singleton() ? EditorVCSInterface::get_singleton()->get_vcs_name() : "";
+}
+
+VersionControlEditorPlugin::VersionControlEditorPlugin() {
+
+	singleton = this;
+	staged_files_count = 0;
+
+	version_control_actions = memnew(PopupMenu);
+	version_control_actions->set_v_size_flags(BoxContainer::SIZE_SHRINK_CENTER);
+
+	set_up_dialog = memnew(AcceptDialog);
+	set_up_dialog->set_title(TTR("Set Up Version Control"));
+	set_up_dialog->set_custom_minimum_size(Size2(400, 100));
+	version_control_actions->add_child(set_up_dialog);
+
+	set_up_ok_button = set_up_dialog->get_ok();
+	set_up_ok_button->set_disabled(false);
+	set_up_ok_button->set_text(TTR("Close"));
+
+	set_up_vbc = memnew(VBoxContainer);
+	set_up_vbc->set_alignment(VBoxContainer::ALIGN_CENTER);
+	set_up_dialog->add_child(set_up_vbc);
+
+	set_up_hbc = memnew(HBoxContainer);
+	set_up_hbc->set_h_size_flags(HBoxContainer::SIZE_EXPAND_FILL);
+	set_up_vbc->add_child(set_up_hbc);
+
+	set_up_vcs_status = memnew(RichTextLabel);
+	set_up_vcs_status->set_text(TTR("VCS Addon is not initialized"));
+	set_up_vbc->add_child(set_up_vcs_status);
+
+	set_up_vcs_label = memnew(Label);
+	set_up_vcs_label->set_text(TTR("Version Control System"));
+	set_up_hbc->add_child(set_up_vcs_label);
+
+	set_up_choice = memnew(OptionButton);
+	set_up_choice->set_h_size_flags(HBoxContainer::SIZE_EXPAND_FILL);
+	set_up_choice->connect("item_selected", this, "_selected_a_vcs");
+	set_up_hbc->add_child(set_up_choice);
+
+	set_up_init_settings = NULL;
+
+	set_up_init_button = memnew(Button);
+	set_up_init_button->set_disabled(true);
+	set_up_init_button->set_text(TTR("Initialize"));
+	set_up_init_button->connect("pressed", this, "_initialize_vcs");
+	set_up_vbc->add_child(set_up_init_button);
+
+	version_control_actions->set_v_size_flags(PopupMenu::SIZE_EXPAND_FILL);
+	version_control_actions->set_h_size_flags(PopupMenu::SIZE_EXPAND_FILL);
+
+	version_commit_dock = memnew(VBoxContainer);
+	version_commit_dock->set_visible(false);
+
+	commit_box_vbc = memnew(VBoxContainer);
+	commit_box_vbc->set_alignment(VBoxContainer::ALIGN_BEGIN);
+	commit_box_vbc->set_h_size_flags(VBoxContainer::SIZE_EXPAND_FILL);
+	commit_box_vbc->set_v_size_flags(VBoxContainer::SIZE_EXPAND_FILL);
+	version_commit_dock->add_child(commit_box_vbc);
+
+	stage_tools = memnew(HSplitContainer);
+	stage_tools->set_dragger_visibility(SplitContainer::DRAGGER_HIDDEN_COLLAPSED);
+	commit_box_vbc->add_child(stage_tools);
+
+	staging_area_label = memnew(Label);
+	staging_area_label->set_h_size_flags(Label::SIZE_EXPAND_FILL);
+	staging_area_label->set_text(TTR("Staging area"));
+	stage_tools->add_child(staging_area_label);
+
+	refresh_button = memnew(Button);
+	refresh_button->set_tooltip(TTR("Detect new changes"));
+	refresh_button->set_text(TTR("Refresh"));
+	refresh_button->set_icon(EditorNode::get_singleton()->get_gui_base()->get_icon("Reload", "EditorIcons"));
+	refresh_button->connect("pressed", this, "_refresh_stage_area");
+	stage_tools->add_child(refresh_button);
+
+	stage_files = memnew(Tree);
+	stage_files->set_h_size_flags(Tree::SIZE_EXPAND_FILL);
+	stage_files->set_v_size_flags(Tree::SIZE_EXPAND_FILL);
+	stage_files->set_columns(1);
+	stage_files->set_column_title(0, TTR("Changes"));
+	stage_files->set_column_titles_visible(true);
+	stage_files->set_allow_reselect(true);
+	stage_files->set_allow_rmb_select(true);
+	stage_files->set_select_mode(Tree::SelectMode::SELECT_MULTI);
+	stage_files->set_edit_checkbox_cell_only_when_checkbox_is_pressed(true);
+	stage_files->connect("cell_selected", this, "_view_file_diff");
+	stage_files->create_item();
+	stage_files->set_hide_root(true);
+	commit_box_vbc->add_child(stage_files);
+
+	change_type_to_strings[CHANGE_TYPE_NEW] = TTR("New");
+	change_type_to_strings[CHANGE_TYPE_MODIFIED] = TTR("Modified");
+	change_type_to_strings[CHANGE_TYPE_RENAMED] = TTR("Renamed");
+	change_type_to_strings[CHANGE_TYPE_DELETED] = TTR("Deleted");
+	change_type_to_strings[CHANGE_TYPE_TYPECHANGE] = TTR("Typechange");
+
+	change_type_to_color[CHANGE_TYPE_NEW] = EditorNode::get_singleton()->get_gui_base()->get_color("success_color", "Editor");
+	change_type_to_color[CHANGE_TYPE_MODIFIED] = EditorNode::get_singleton()->get_gui_base()->get_color("warning_color", "Editor");
+	change_type_to_color[CHANGE_TYPE_RENAMED] = EditorNode::get_singleton()->get_gui_base()->get_color("disabled_font_color", "Editor");
+	change_type_to_color[CHANGE_TYPE_DELETED] = EditorNode::get_singleton()->get_gui_base()->get_color("error_color", "Editor");
+	change_type_to_color[CHANGE_TYPE_TYPECHANGE] = EditorNode::get_singleton()->get_gui_base()->get_color("font_color", "Editor");
+
+	stage_buttons = memnew(HSplitContainer);
+	stage_buttons->set_dragger_visibility(SplitContainer::DRAGGER_HIDDEN_COLLAPSED);
+	commit_box_vbc->add_child(stage_buttons);
+
+	stage_selected_button = memnew(Button);
+	stage_selected_button->set_h_size_flags(Button::SIZE_EXPAND_FILL);
+	stage_selected_button->set_text(TTR("Stage Selected"));
+	stage_selected_button->connect("pressed", this, "_stage_selected");
+	stage_buttons->add_child(stage_selected_button);
+
+	stage_all_button = memnew(Button);
+	stage_all_button->set_text(TTR("Stage All"));
+	stage_all_button->connect("pressed", this, "_stage_all");
+	stage_buttons->add_child(stage_all_button);
+
+	commit_box_vbc->add_child(memnew(HSeparator));
+
+	commit_message = memnew(TextEdit);
+	commit_message->set_h_size_flags(Control::SIZE_EXPAND_FILL);
+	commit_message->set_h_grow_direction(Control::GrowDirection::GROW_DIRECTION_BEGIN);
+	commit_message->set_v_grow_direction(Control::GrowDirection::GROW_DIRECTION_END);
+	commit_message->set_custom_minimum_size(Size2(200, 100));
+	commit_message->set_wrap_enabled(true);
+	commit_message->set_text(TTR("Add a commit message"));
+	commit_box_vbc->add_child(commit_message);
+
+	commit_button = memnew(Button);
+	commit_button->set_text(TTR("Commit Changes"));
+	commit_button->connect("pressed", this, "_send_commit_msg");
+	commit_box_vbc->add_child(commit_button);
+
+	commit_status = memnew(Label);
+	commit_status->set_align(Label::ALIGN_CENTER);
+	commit_box_vbc->add_child(commit_status);
+
+	version_control_dock = memnew(PanelContainer);
+	version_control_dock->set_v_size_flags(Control::SIZE_EXPAND_FILL);
+	version_control_dock->hide();
+
+	diff_vbc = memnew(VBoxContainer);
+	diff_vbc->set_h_size_flags(HBoxContainer::SIZE_FILL);
+	diff_vbc->set_v_size_flags(HBoxContainer::SIZE_FILL);
+	version_control_dock->add_child(diff_vbc);
+
+	diff_hbc = memnew(HBoxContainer);
+	diff_hbc->set_h_size_flags(HBoxContainer::SIZE_FILL);
+	diff_vbc->add_child(diff_hbc);
+
+	diff_heading = memnew(Label);
+	diff_heading->set_text(TTR("Status"));
+	diff_heading->set_tooltip(TTR("View file diffs before commiting them to the latest version"));
+	diff_hbc->add_child(diff_heading);
+
+	diff_file_name = memnew(Label);
+	diff_file_name->set_text(TTR("No file diff is active"));
+	diff_file_name->set_h_size_flags(Label::SIZE_EXPAND_FILL);
+	diff_file_name->set_align(Label::ALIGN_RIGHT);
+	diff_hbc->add_child(diff_file_name);
+
+	diff_refresh_button = memnew(Button);
+	diff_refresh_button->set_tooltip(TTR("Detect changes in file diff"));
+	diff_refresh_button->set_icon(EditorNode::get_singleton()->get_gui_base()->get_icon("Reload", "EditorIcons"));
+	diff_refresh_button->connect("pressed", this, "_refresh_file_diff");
+	diff_hbc->add_child(diff_refresh_button);
+
+	diff = memnew(RichTextLabel);
+	diff->set_h_size_flags(TextEdit::SIZE_EXPAND_FILL);
+	diff->set_v_size_flags(TextEdit::SIZE_EXPAND_FILL);
+	diff->set_selection_enabled(true);
+	diff_vbc->add_child(diff);
+}
+
+VersionControlEditorPlugin::~VersionControlEditorPlugin() {
+
+	shut_down();
+	memdelete(version_control_dock);
+	memdelete(version_commit_dock);
+	memdelete(version_control_actions);
+}
diff --git a/editor/plugins/version_control_editor_plugin.h b/editor/plugins/version_control_editor_plugin.h
new file mode 100644
index 0000000000..dd7660d587
--- /dev/null
+++ b/editor/plugins/version_control_editor_plugin.h
@@ -0,0 +1,116 @@
+#ifndef VERSION_CONTROL_EDITOR_PLUGIN_H
+#define VERSION_CONTROL_EDITOR_PLUGIN_H
+
+#include "editor/editor_plugin.h"
+#include "editor/editor_vcs_interface.h"
+#include "scene/gui/container.h"
+#include "scene/gui/rich_text_label.h"
+#include "scene/gui/text_edit.h"
+#include "scene/gui/tree.h"
+
+class VersionControlEditorPlugin : public EditorPlugin {
+
+	GDCLASS(VersionControlEditorPlugin, EditorPlugin)
+
+public:
+	enum ChangeType {
+
+		CHANGE_TYPE_NEW = 0,
+		CHANGE_TYPE_MODIFIED = 1,
+		CHANGE_TYPE_RENAMED = 2,
+		CHANGE_TYPE_DELETED = 3,
+		CHANGE_TYPE_TYPECHANGE = 4
+	};
+
+private:
+	static VersionControlEditorPlugin *singleton;
+
+	int staged_files_count;
+	List<StringName> available_addons;
+
+	PopupMenu *version_control_actions;
+	AcceptDialog *set_up_dialog;
+	VBoxContainer *set_up_vbc;
+	HBoxContainer *set_up_hbc;
+	Label *set_up_vcs_label;
+	OptionButton *set_up_choice;
+	PanelContainer *set_up_init_settings;
+	Button *set_up_init_button;
+	RichTextLabel *set_up_vcs_status;
+	Button *set_up_ok_button;
+
+	HashMap<ChangeType, String> change_type_to_strings;
+	HashMap<ChangeType, Color> change_type_to_color;
+
+	VBoxContainer *version_commit_dock;
+	VBoxContainer *commit_box_vbc;
+	HSplitContainer *stage_tools;
+	Tree *stage_files;
+	TreeItem *new_files;
+	TreeItem *modified_files;
+	TreeItem *renamed_files;
+	TreeItem *deleted_files;
+	TreeItem *typechange_files;
+	Label *staging_area_label;
+	HSplitContainer *stage_buttons;
+	Button *stage_all_button;
+	Button *stage_selected_button;
+	Button *refresh_button;
+	TextEdit *commit_message;
+	Button *commit_button;
+	Label *commit_status;
+
+	PanelContainer *version_control_dock;
+	ToolButton *version_control_dock_button;
+	VBoxContainer *diff_vbc;
+	HBoxContainer *diff_hbc;
+	Button *diff_refresh_button;
+	Label *diff_file_name;
+	Label *diff_heading;
+	RichTextLabel *diff;
+
+	void _populate_available_vcs_names();
+	void _selected_a_vcs(int p_id);
+	void _initialize_vcs();
+	void _send_commit_msg();
+	void _refresh_stage_area();
+	void _stage_selected();
+	void _stage_all();
+	void _view_file_diff();
+	void _display_file_diff(String p_file_path);
+	void _refresh_file_diff();
+	void _clear_file_diff();
+	void _update_stage_status();
+	void _update_commit_status();
+
+	friend class EditorVCSInterface;
+
+protected:
+	static void _bind_methods();
+
+public:
+	static VersionControlEditorPlugin *get_singleton();
+
+	void popup_vcs_set_up_dialog(const Control *p_gui_base);
+	void set_version_control_tool_button(ToolButton *p_button) { version_control_dock_button = p_button; }
+
+	PopupMenu *get_version_control_actions_panel() const { return version_control_actions; }
+	VBoxContainer *get_version_commit_dock() const { return version_commit_dock; }
+	PanelContainer *get_version_control_dock() const { return version_control_dock; }
+
+	List<StringName> get_available_vcs_names() const { return available_addons; }
+	bool get_is_vcs_intialized() const;
+	const String get_vcs_name() const;
+
+	void register_editor();
+	void fetch_available_vcs_addon_names();
+	void clear_stage_area();
+	void shut_down();
+
+	VersionControlEditorPlugin();
+	~VersionControlEditorPlugin();
+};
+
+VARIANT_ENUM_CAST(VersionControlEditorPlugin::ChangeType);
+
+#endif // !VERSION_CONTROL_EDITOR_PLUGIN_H