File: create_dialog.cpp

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/*************************************************************************/
/*  create_dialog.cpp                                                    */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#include "create_dialog.h"

#include "class_db.h"
#include "editor_help.h"
#include "editor_node.h"
#include "editor_settings.h"
#include "os/keyboard.h"
#include "print_string.h"
#include "scene/gui/box_container.h"

void CreateDialog::popup_create(bool p_dont_clear, bool p_replace_mode) {

	recent->clear();

	FileAccess *f = FileAccess::open(EditorSettings::get_singleton()->get_project_settings_dir().plus_file("create_recent." + base_type), FileAccess::READ);

	if (f) {

		TreeItem *root = recent->create_item();

		while (!f->eof_reached()) {
			String l = f->get_line().strip_edges();

			if (l != String()) {

				TreeItem *ti = recent->create_item(root);
				ti->set_text(0, l);
				ti->set_icon(0, _get_editor_icon(l));
			}
		}

		memdelete(f);
	}

	favorites->clear();

	f = FileAccess::open(EditorSettings::get_singleton()->get_project_settings_dir().plus_file("favorites." + base_type), FileAccess::READ);

	favorite_list.clear();

	if (f) {

		while (!f->eof_reached()) {
			String l = f->get_line().strip_edges();

			if (l != String()) {
				favorite_list.push_back(l);
			}
		}

		memdelete(f);
	}

	_update_favorite_list();

	// Restore valid window bounds or pop up at default size.
	if (EditorSettings::get_singleton()->has_setting("interface/dialogs/create_new_node_bounds")) {
		popup(EditorSettings::get_singleton()->get("interface/dialogs/create_new_node_bounds"));
	} else {
		popup_centered_ratio();
	}

	if (p_dont_clear) {
		search_box->select_all();
	} else {
		search_box->clear();
	}

	search_box->grab_focus();

	_update_search();

	bool enable_rl = EditorSettings::get_singleton()->get("docks/scene_tree/draw_relationship_lines");
	Color rl_color = EditorSettings::get_singleton()->get("docks/scene_tree/relationship_line_color");

	if (enable_rl) {
		search_options->add_constant_override("draw_relationship_lines", 1);
		search_options->add_color_override("relationship_line_color", rl_color);
	} else {
		search_options->add_constant_override("draw_relationship_lines", 0);
	}

	is_replace_mode = p_replace_mode;

	if (p_replace_mode) {
		set_title(vformat(TTR("Change %s Type"), base_type));
		get_ok()->set_text(TTR("Change"));
	} else {
		set_title(vformat(TTR("Create New %s"), base_type));
		get_ok()->set_text(TTR("Create"));
	}
}

void CreateDialog::_text_changed(const String &p_newtext) {

	_update_search();
}

void CreateDialog::_sbox_input(const Ref<InputEvent> &p_ie) {

	Ref<InputEventKey> k = p_ie;
	if (k.is_valid() && (k->get_scancode() == KEY_UP ||
								k->get_scancode() == KEY_DOWN ||
								k->get_scancode() == KEY_PAGEUP ||
								k->get_scancode() == KEY_PAGEDOWN)) {

		search_options->call("_gui_input", k);
		search_box->accept_event();
	}
}

Ref<Texture> CreateDialog::_get_editor_icon(const String &p_type) const {

	if (has_icon(p_type, "EditorIcons")) {
		return get_icon(p_type, "EditorIcons");
	}

	const Map<String, Vector<EditorData::CustomType> > &p_map = EditorNode::get_editor_data().get_custom_types();
	for (const Map<String, Vector<EditorData::CustomType> >::Element *E = p_map.front(); E; E = E->next()) {
		const Vector<EditorData::CustomType> &ct = E->value();
		for (int i = 0; i < ct.size(); ++i) {
			if (ct[i].name == p_type) {
				if (ct[i].icon.is_valid()) {
					return ct[i].icon;
				} else {
					return get_icon("Object", "EditorIcons");
				}
			}
		}
	}

	return get_icon("Object", "EditorIcons");
}

void CreateDialog::add_type(const String &p_type, HashMap<String, TreeItem *> &p_types, TreeItem *p_root, TreeItem **to_select) {

	if (p_types.has(p_type))
		return;
	if (!ClassDB::is_parent_class(p_type, base_type) || p_type == base_type)
		return;

	String inherits = ClassDB::get_parent_class(p_type);

	TreeItem *parent = p_root;

	if (inherits.length()) {

		if (!p_types.has(inherits)) {

			add_type(inherits, p_types, p_root, to_select);
		}

		if (p_types.has(inherits))
			parent = p_types[inherits];
	}

	TreeItem *item = search_options->create_item(parent);
	item->set_text(0, p_type);
	if (!ClassDB::can_instance(p_type)) {
		item->set_custom_color(0, get_color("disabled_font_color", "Editor"));
		item->set_selectable(0, false);
	} else {
		bool is_search_subsequence = search_box->get_text().is_subsequence_ofi(p_type);
		String to_select_type = *to_select ? (*to_select)->get_text(0) : "";
		bool current_item_is_preffered = ClassDB::is_parent_class(p_type, preferred_search_result_type) && !ClassDB::is_parent_class(to_select_type, preferred_search_result_type);
		if (*to_select && p_type.length() < (*to_select)->get_text(0).length()) {
			current_item_is_preffered = true;
		}

		if (((!*to_select || current_item_is_preffered) && is_search_subsequence) || search_box->get_text() == p_type) {
			*to_select = item;
		}
	}

	if (bool(EditorSettings::get_singleton()->get("docks/scene_tree/start_create_dialog_fully_expanded"))) {
		item->set_collapsed(false);
	} else {
		// don't collapse search results
		bool collapse = (search_box->get_text() == "");
		// don't collapse the root node
		collapse &= (item != p_root);
		// don't collapse abstract nodes on the first tree level
		collapse &= ((parent != p_root) || (ClassDB::can_instance(p_type)));
		item->set_collapsed(collapse);
	}

	const String &description = EditorHelp::get_doc_data()->class_list[p_type].brief_description;
	item->set_tooltip(0, description);

	if (has_icon(p_type, "EditorIcons")) {

		item->set_icon(0, get_icon(p_type, "EditorIcons"));
	}

	p_types[p_type] = item;
}

void CreateDialog::_update_search() {

	search_options->clear();
	favorite->set_disabled(true);

	help_bit->set_text("");
	/*
	TreeItem *root = search_options->create_item();
	_parse_fs(EditorFileSystem::get_singleton()->get_filesystem());
*/

	HashMap<String, TreeItem *> types;

	TreeItem *root = search_options->create_item();

	root->set_text(0, base_type);
	if (has_icon(base_type, "EditorIcons")) {
		root->set_icon(0, get_icon(base_type, "EditorIcons"));
	}

	List<StringName>::Element *I = type_list.front();
	TreeItem *to_select = search_box->get_text() == base_type ? root : NULL;

	for (; I; I = I->next()) {

		String type = I->get();

		if (base_type == "Node" && type.begins_with("Editor"))
			continue; // do not show editor nodes

		if (base_type == "Resource" && ClassDB::is_parent_class(type, "PluginScript"))
			// PluginScript must be initialized before use, which is not possible here
			continue;

		if (!ClassDB::can_instance(type))
			continue; // can't create what can't be instanced

		if (search_box->get_text() == "") {
			add_type(type, types, root, &to_select);
		} else {

			bool found = false;
			String type = I->get();
			while (type != "" && ClassDB::is_parent_class(type, base_type) && type != base_type) {
				if (search_box->get_text().is_subsequence_ofi(type)) {

					found = true;
					break;
				}

				type = ClassDB::get_parent_class(type);
			}

			if (found)
				add_type(I->get(), types, root, &to_select);
		}

		if (EditorNode::get_editor_data().get_custom_types().has(type) && ClassDB::is_parent_class(type, base_type)) {
			//there are custom types based on this... cool.

			const Vector<EditorData::CustomType> &ct = EditorNode::get_editor_data().get_custom_types()[type];
			for (int i = 0; i < ct.size(); i++) {

				bool show = search_box->get_text().is_subsequence_ofi(ct[i].name);

				if (!show)
					continue;

				if (!types.has(type))
					add_type(type, types, root, &to_select);

				TreeItem *ti;
				if (types.has(type))
					ti = types[type];
				else
					ti = search_options->get_root();

				TreeItem *item = search_options->create_item(ti);
				item->set_metadata(0, type);
				item->set_text(0, ct[i].name);
				if (ct[i].icon.is_valid()) {
					item->set_icon(0, ct[i].icon);
				}

				if (!to_select || ct[i].name == search_box->get_text()) {
					to_select = item;
				}
			}
		}
	}

	if (search_box->get_text() == "") {
		to_select = root;
	}

	if (to_select) {
		to_select->select(0);
		search_options->scroll_to_item(to_select);
		favorite->set_disabled(false);
		favorite->set_pressed(favorite_list.find(to_select->get_text(0)) != -1);
	}

	get_ok()->set_disabled(root->get_children() == NULL);
}

void CreateDialog::_confirmed() {

	TreeItem *ti = search_options->get_selected();
	if (!ti)
		return;

	FileAccess *f = FileAccess::open(EditorSettings::get_singleton()->get_project_settings_dir().plus_file("create_recent." + base_type), FileAccess::WRITE);

	if (f) {
		f->store_line(get_selected_type());
		TreeItem *t = recent->get_root();
		if (t)
			t = t->get_children();
		int count = 0;
		while (t) {
			if (t->get_text(0) != get_selected_type()) {

				f->store_line(t->get_text(0));
			}

			if (count > 32) {
				//limit it to 32 entries..
				break;
			}
			t = t->get_next();
			count++;
		}

		memdelete(f);
	}

	emit_signal("create");
	hide();
}

void CreateDialog::_notification(int p_what) {

	switch (p_what) {
		case NOTIFICATION_ENTER_TREE: {
			connect("confirmed", this, "_confirmed");
			favorite->set_icon(get_icon("Favorites", "EditorIcons"));
		} break;
		case NOTIFICATION_EXIT_TREE: {
			disconnect("confirmed", this, "_confirmed");
		} break;
		case NOTIFICATION_VISIBILITY_CHANGED: {
			if (is_visible_in_tree()) {
				search_box->call_deferred("grab_focus"); // still not visible
				search_box->select_all();
			}
		} break;
		case NOTIFICATION_POPUP_HIDE: {
			EditorSettings::get_singleton()->set("interface/dialogs/create_new_node_bounds", get_rect());
		} break;
	}
}

void CreateDialog::set_base_type(const String &p_base) {

	base_type = p_base;
	if (is_replace_mode)
		set_title(vformat(TTR("Change %s Type"), p_base));
	else
		set_title(vformat(TTR("Create New %s"), p_base));

	_update_search();
}

String CreateDialog::get_base_type() const {

	return base_type;
}

void CreateDialog::set_preferred_search_result_type(const String &p_preferred_type) {
	preferred_search_result_type = p_preferred_type;
}

String CreateDialog::get_preferred_search_result_type() {

	return preferred_search_result_type;
}
String CreateDialog::get_selected_type() {

	TreeItem *selected = search_options->get_selected();
	if (selected)
		return selected->get_text(0);
	else
		return String();
}

Object *CreateDialog::instance_selected() {

	TreeItem *selected = search_options->get_selected();

	if (selected) {

		Variant md = selected->get_metadata(0);

		String custom;
		if (md.get_type() != Variant::NIL)
			custom = md;

		if (custom != String()) {
			if (EditorNode::get_editor_data().get_custom_types().has(custom)) {

				for (int i = 0; i < EditorNode::get_editor_data().get_custom_types()[custom].size(); i++) {
					if (EditorNode::get_editor_data().get_custom_types()[custom][i].name == selected->get_text(0)) {
						Ref<Texture> icon = EditorNode::get_editor_data().get_custom_types()[custom][i].icon;
						Ref<Script> script = EditorNode::get_editor_data().get_custom_types()[custom][i].script;
						String name = selected->get_text(0);

						Object *ob = ClassDB::instance(custom);
						ERR_FAIL_COND_V(!ob, NULL);
						if (ob->is_class("Node")) {
							ob->call("set_name", name);
						}
						ob->set_script(script.get_ref_ptr());
						if (icon.is_valid())
							ob->set_meta("_editor_icon", icon);
						return ob;
					}
				}
			}
		} else {
			return ClassDB::instance(selected->get_text(0));
		}
	}

	return NULL;
}

void CreateDialog::_item_selected() {

	TreeItem *item = search_options->get_selected();
	if (!item)
		return;

	String name = item->get_text(0);

	favorite->set_disabled(false);
	favorite->set_pressed(favorite_list.find(name) != -1);

	if (!EditorHelp::get_doc_data()->class_list.has(name))
		return;

	help_bit->set_text(EditorHelp::get_doc_data()->class_list[name].brief_description);

	get_ok()->set_disabled(false);
}

void CreateDialog::_favorite_toggled() {

	TreeItem *item = search_options->get_selected();
	if (!item)
		return;

	String name = item->get_text(0);

	if (favorite_list.find(name) == -1) {
		favorite_list.push_back(name);
		favorite->set_pressed(true);
	} else {
		favorite_list.erase(name);
		favorite->set_pressed(false);
	}

	_save_favorite_list();
	_update_favorite_list();
}

void CreateDialog::_save_favorite_list() {

	FileAccess *f = FileAccess::open(EditorSettings::get_singleton()->get_project_settings_dir().plus_file("favorites." + base_type), FileAccess::WRITE);

	if (f) {

		for (int i = 0; i < favorite_list.size(); i++) {

			f->store_line(favorite_list[i]);
		}
		memdelete(f);
	}
}

void CreateDialog::_update_favorite_list() {

	favorites->clear();
	TreeItem *root = favorites->create_item();
	for (int i = 0; i < favorite_list.size(); i++) {
		TreeItem *ti = favorites->create_item(root);
		String l = favorite_list[i];
		ti->set_text(0, l);
		ti->set_icon(0, _get_editor_icon(l));
	}
}

void CreateDialog::_history_selected() {

	TreeItem *item = recent->get_selected();
	if (!item)
		return;

	search_box->set_text(item->get_text(0));
	_update_search();
}

void CreateDialog::_favorite_selected() {

	TreeItem *item = favorites->get_selected();
	if (!item)
		return;

	search_box->set_text(item->get_text(0));
	_update_search();
}

void CreateDialog::_history_activated() {

	_history_selected();
	_confirmed();
}

void CreateDialog::_favorite_activated() {

	_favorite_selected();
	_confirmed();
}

Variant CreateDialog::get_drag_data_fw(const Point2 &p_point, Control *p_from) {

	TreeItem *ti = favorites->get_item_at_position(p_point);
	if (ti) {
		Dictionary d;
		d["type"] = "create_favorite_drag";
		d["class"] = ti->get_text(0);

		ToolButton *tb = memnew(ToolButton);
		tb->set_icon(ti->get_icon(0));
		tb->set_text(ti->get_text(0));
		set_drag_preview(tb);

		return d;
	}

	return Variant();
}

bool CreateDialog::can_drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) const {

	Dictionary d = p_data;
	if (d.has("type") && String(d["type"]) == "create_favorite_drag") {
		favorites->set_drop_mode_flags(Tree::DROP_MODE_INBETWEEN);
		return true;
	}

	return false;
}
void CreateDialog::drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) {

	Dictionary d = p_data;

	TreeItem *ti = favorites->get_item_at_position(p_point);
	if (!ti)
		return;

	String drop_at = ti->get_text(0);
	int ds = favorites->get_drop_section_at_position(p_point);

	int drop_idx = favorite_list.find(drop_at);
	if (drop_idx < 0)
		return;

	String type = d["class"];

	int from_idx = favorite_list.find(type);
	if (from_idx < 0)
		return;

	if (drop_idx == from_idx) {
		ds = -1; //cause it will be gone
	} else if (drop_idx > from_idx) {
		drop_idx--;
	}

	favorite_list.remove(from_idx);

	if (ds < 0) {
		favorite_list.insert(drop_idx, type);
	} else {
		if (drop_idx >= favorite_list.size() - 1) {
			favorite_list.push_back(type);
		} else {
			favorite_list.insert(drop_idx + 1, type);
		}
	}

	_save_favorite_list();
	_update_favorite_list();
}

void CreateDialog::_bind_methods() {

	ClassDB::bind_method(D_METHOD("_text_changed"), &CreateDialog::_text_changed);
	ClassDB::bind_method(D_METHOD("_confirmed"), &CreateDialog::_confirmed);
	ClassDB::bind_method(D_METHOD("_sbox_input"), &CreateDialog::_sbox_input);
	ClassDB::bind_method(D_METHOD("_item_selected"), &CreateDialog::_item_selected);
	ClassDB::bind_method(D_METHOD("_favorite_toggled"), &CreateDialog::_favorite_toggled);
	ClassDB::bind_method(D_METHOD("_history_selected"), &CreateDialog::_history_selected);
	ClassDB::bind_method(D_METHOD("_favorite_selected"), &CreateDialog::_favorite_selected);
	ClassDB::bind_method(D_METHOD("_history_activated"), &CreateDialog::_history_activated);
	ClassDB::bind_method(D_METHOD("_favorite_activated"), &CreateDialog::_favorite_activated);

	ClassDB::bind_method("get_drag_data_fw", &CreateDialog::get_drag_data_fw);
	ClassDB::bind_method("can_drop_data_fw", &CreateDialog::can_drop_data_fw);
	ClassDB::bind_method("drop_data_fw", &CreateDialog::drop_data_fw);

	ADD_SIGNAL(MethodInfo("create"));
}

CreateDialog::CreateDialog() {

	is_replace_mode = false;

	ClassDB::get_class_list(&type_list);
	type_list.sort_custom<StringName::AlphCompare>();

	set_resizable(true);

	HSplitContainer *hsc = memnew(HSplitContainer);
	add_child(hsc);

	VSplitContainer *vsc = memnew(VSplitContainer);
	hsc->add_child(vsc);

	VBoxContainer *fav_vb = memnew(VBoxContainer);
	vsc->add_child(fav_vb);
	fav_vb->set_custom_minimum_size(Size2(150, 100) * EDSCALE);
	fav_vb->set_v_size_flags(SIZE_EXPAND_FILL);

	favorites = memnew(Tree);
	fav_vb->add_margin_child(TTR("Favorites:"), favorites, true);
	favorites->set_hide_root(true);
	favorites->set_hide_folding(true);
	favorites->connect("cell_selected", this, "_favorite_selected");
	favorites->connect("item_activated", this, "_favorite_activated");
	favorites->set_drag_forwarding(this);

	VBoxContainer *rec_vb = memnew(VBoxContainer);
	vsc->add_child(rec_vb);
	rec_vb->set_custom_minimum_size(Size2(150, 100) * EDSCALE);
	rec_vb->set_v_size_flags(SIZE_EXPAND_FILL);

	recent = memnew(Tree);
	rec_vb->add_margin_child(TTR("Recent:"), recent, true);
	recent->set_hide_root(true);
	recent->set_hide_folding(true);
	recent->connect("cell_selected", this, "_history_selected");
	recent->connect("item_activated", this, "_history_activated");

	VBoxContainer *vbc = memnew(VBoxContainer);
	hsc->add_child(vbc);
	vbc->set_custom_minimum_size(Size2(300, 0) * EDSCALE);
	vbc->set_h_size_flags(SIZE_EXPAND_FILL);
	HBoxContainer *search_hb = memnew(HBoxContainer);
	search_box = memnew(LineEdit);
	search_box->set_h_size_flags(SIZE_EXPAND_FILL);
	search_hb->add_child(search_box);
	favorite = memnew(Button);
	favorite->set_flat(true);
	favorite->set_toggle_mode(true);
	search_hb->add_child(favorite);
	favorite->connect("pressed", this, "_favorite_toggled");
	vbc->add_margin_child(TTR("Search:"), search_hb);
	search_box->connect("text_changed", this, "_text_changed");
	search_box->connect("gui_input", this, "_sbox_input");
	search_options = memnew(Tree);
	vbc->add_margin_child(TTR("Matches:"), search_options, true);
	get_ok()->set_disabled(true);
	register_text_enter(search_box);
	set_hide_on_ok(false);
	search_options->connect("item_activated", this, "_confirmed");
	search_options->connect("cell_selected", this, "_item_selected");
	base_type = "Object";
	preferred_search_result_type = "";

	help_bit = memnew(EditorHelpBit);
	vbc->add_margin_child(TTR("Description:"), help_bit);
	help_bit->connect("request_hide", this, "_closed");
}