/*************************************************************************/
/*  editor_file_dialog.cpp                                               */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 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 "editor_file_dialog.h"

#include "core/config/project_settings.h"
#include "core/io/file_access.h"
#include "core/os/keyboard.h"
#include "core/os/os.h"
#include "dependency_editor.h"
#include "editor/editor_file_system.h"
#include "editor/editor_node.h"
#include "editor/editor_resource_preview.h"
#include "editor/editor_scale.h"
#include "editor/editor_settings.h"
#include "scene/gui/center_container.h"
#include "scene/gui/label.h"
#include "scene/gui/margin_container.h"
#include "scene/gui/option_button.h"
#include "scene/gui/separator.h"
#include "scene/gui/split_container.h"
#include "scene/gui/texture_rect.h"
#include "servers/display_server.h"

EditorFileDialog::GetIconFunc EditorFileDialog::get_icon_func = nullptr;
EditorFileDialog::GetIconFunc EditorFileDialog::get_large_icon_func = nullptr;

EditorFileDialog::RegisterFunc EditorFileDialog::register_func = nullptr;
EditorFileDialog::RegisterFunc EditorFileDialog::unregister_func = nullptr;

void EditorFileDialog::popup_file_dialog() {
	popup_centered_clamped(Size2(1050, 700) * EDSCALE, 0.8);
	_focus_file_text();
}

void EditorFileDialog::_focus_file_text() {
	int lp = file->get_text().rfind(".");
	if (lp != -1) {
		file->select(0, lp);
		file->grab_focus();
	}
}

VBoxContainer *EditorFileDialog::get_vbox() {
	return vbox;
}

void EditorFileDialog::_update_theme_item_cache() {
	ConfirmationDialog::_update_theme_item_cache();

	theme_cache.parent_folder = get_theme_icon(SNAME("ArrowUp"), SNAME("EditorIcons"));
	theme_cache.forward_folder = get_theme_icon(SNAME("Forward"), SNAME("EditorIcons"));
	theme_cache.back_folder = get_theme_icon(SNAME("Back"), SNAME("EditorIcons"));
	theme_cache.reload = get_theme_icon(SNAME("Reload"), SNAME("EditorIcons"));
	theme_cache.toggle_hidden = get_theme_icon(SNAME("GuiVisibilityVisible"), SNAME("EditorIcons"));
	theme_cache.favorite = get_theme_icon(SNAME("Favorites"), SNAME("EditorIcons"));
	theme_cache.mode_thumbnails = get_theme_icon(SNAME("FileThumbnail"), SNAME("EditorIcons"));
	theme_cache.mode_list = get_theme_icon(SNAME("FileList"), SNAME("EditorIcons"));
	theme_cache.favorites_up = get_theme_icon(SNAME("MoveUp"), SNAME("EditorIcons"));
	theme_cache.favorites_down = get_theme_icon(SNAME("MoveDown"), SNAME("EditorIcons"));

	theme_cache.folder = get_theme_icon(SNAME("Folder"), SNAME("EditorIcons"));
	theme_cache.folder_icon_color = get_theme_color(SNAME("folder_icon_color"), SNAME("FileDialog"));

	theme_cache.action_copy = get_theme_icon(SNAME("ActionCopy"), SNAME("EditorIcons"));
	theme_cache.action_delete = get_theme_icon(SNAME("Remove"), SNAME("EditorIcons"));
	theme_cache.filesystem = get_theme_icon(SNAME("Filesystem"), SNAME("EditorIcons"));

	theme_cache.folder_medium_thumbnail = get_theme_icon(SNAME("FolderMediumThumb"), SNAME("EditorIcons"));
	theme_cache.file_medium_thumbnail = get_theme_icon(SNAME("FileMediumThumb"), SNAME("EditorIcons"));
	theme_cache.folder_big_thumbnail = get_theme_icon(SNAME("FolderBigThumb"), SNAME("EditorIcons"));
	theme_cache.file_big_thumbnail = get_theme_icon(SNAME("FileBigThumb"), SNAME("EditorIcons"));

	theme_cache.progress[0] = get_theme_icon("Progress1", SNAME("EditorIcons"));
	theme_cache.progress[1] = get_theme_icon("Progress2", SNAME("EditorIcons"));
	theme_cache.progress[2] = get_theme_icon("Progress3", SNAME("EditorIcons"));
	theme_cache.progress[3] = get_theme_icon("Progress4", SNAME("EditorIcons"));
	theme_cache.progress[4] = get_theme_icon("Progress5", SNAME("EditorIcons"));
	theme_cache.progress[5] = get_theme_icon("Progress6", SNAME("EditorIcons"));
	theme_cache.progress[6] = get_theme_icon("Progress7", SNAME("EditorIcons"));
	theme_cache.progress[7] = get_theme_icon("Progress8", SNAME("EditorIcons"));
}

void EditorFileDialog::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_THEME_CHANGED:
		case Control::NOTIFICATION_LAYOUT_DIRECTION_CHANGED:
		case NOTIFICATION_TRANSLATION_CHANGED: {
			_update_icons();
			invalidate();
		} break;

		case NOTIFICATION_PROCESS: {
			if (preview_waiting) {
				preview_wheel_timeout -= get_process_delta_time();
				if (preview_wheel_timeout <= 0) {
					preview_wheel_index++;
					if (preview_wheel_index >= 8) {
						preview_wheel_index = 0;
					}

					Ref<Texture2D> frame = theme_cache.progress[preview_wheel_index];
					preview->set_texture(frame);
					preview_wheel_timeout = 0.1;
				}
			}
		} break;

		case EditorSettings::NOTIFICATION_EDITOR_SETTINGS_CHANGED: {
			bool is_showing_hidden = EDITOR_GET("filesystem/file_dialog/show_hidden_files");
			if (show_hidden_files != is_showing_hidden) {
				set_show_hidden_files(is_showing_hidden);
			}
			set_display_mode((DisplayMode)EDITOR_GET("filesystem/file_dialog/display_mode").operator int());

			// DO NOT CALL UPDATE FILE LIST HERE, ALL HUNDREDS OF HIDDEN DIALOGS WILL RESPOND, CALL INVALIDATE INSTEAD
			invalidate();
		} break;

		case NOTIFICATION_VISIBILITY_CHANGED: {
			if (!is_visible()) {
				set_process_shortcut_input(false);
			}

			invalidate(); // For consistency with the standard FileDialog.
		} break;

		case NOTIFICATION_WM_WINDOW_FOCUS_IN: {
			// Check if the current directory was removed externally (much less likely to happen while editor window is focused).
			String previous_dir = get_current_dir();
			while (!dir_access->dir_exists(get_current_dir())) {
				_go_up();

				// In case we can't go further up, use some fallback and break.
				if (get_current_dir() == previous_dir) {
					_dir_submitted(OS::get_singleton()->get_user_data_dir());
					break;
				}
			}
		} break;
	}
}

void EditorFileDialog::shortcut_input(const Ref<InputEvent> &p_event) {
	ERR_FAIL_COND(p_event.is_null());

	Ref<InputEventKey> k = p_event;

	if (k.is_valid()) {
		if (k->is_pressed()) {
			bool handled = false;

			if (ED_IS_SHORTCUT("file_dialog/go_back", p_event)) {
				_go_back();
				handled = true;
			}
			if (ED_IS_SHORTCUT("file_dialog/go_forward", p_event)) {
				_go_forward();
				handled = true;
			}
			if (ED_IS_SHORTCUT("file_dialog/go_up", p_event)) {
				_go_up();
				handled = true;
			}
			if (ED_IS_SHORTCUT("file_dialog/refresh", p_event)) {
				invalidate();
				handled = true;
			}
			if (ED_IS_SHORTCUT("file_dialog/toggle_hidden_files", p_event)) {
				set_show_hidden_files(!show_hidden_files);
				handled = true;
			}
			if (ED_IS_SHORTCUT("file_dialog/toggle_favorite", p_event)) {
				_favorite_pressed();
				handled = true;
			}
			if (ED_IS_SHORTCUT("file_dialog/toggle_mode", p_event)) {
				if (mode_thumbnails->is_pressed()) {
					set_display_mode(DISPLAY_LIST);
				} else {
					set_display_mode(DISPLAY_THUMBNAILS);
				}
				handled = true;
			}
			if (ED_IS_SHORTCUT("file_dialog/create_folder", p_event)) {
				_make_dir();
				handled = true;
			}
			if (ED_IS_SHORTCUT("file_dialog/delete", p_event)) {
				_delete_items();
				handled = true;
			}
			if (ED_IS_SHORTCUT("file_dialog/focus_path", p_event)) {
				dir->grab_focus();
				handled = true;
			}
			if (ED_IS_SHORTCUT("file_dialog/move_favorite_up", p_event)) {
				_favorite_move_up();
				handled = true;
			}
			if (ED_IS_SHORTCUT("file_dialog/move_favorite_down", p_event)) {
				_favorite_move_down();
				handled = true;
			}

			if (handled) {
				set_input_as_handled();
			}
		}
	}
}

void EditorFileDialog::set_enable_multiple_selection(bool p_enable) {
	item_list->set_select_mode(p_enable ? ItemList::SELECT_MULTI : ItemList::SELECT_SINGLE);
};

Vector<String> EditorFileDialog::get_selected_files() const {
	Vector<String> list;
	for (int i = 0; i < item_list->get_item_count(); i++) {
		if (item_list->is_selected(i)) {
			list.push_back(item_list->get_item_text(i));
		}
	}
	return list;
};

void EditorFileDialog::update_dir() {
	if (drives->is_visible()) {
		if (dir_access->get_current_dir().is_network_share_path()) {
			_update_drives(false);
			drives->add_item(RTR("Network"));
			drives->set_item_disabled(-1, true);
			drives->select(drives->get_item_count() - 1);
		} else {
			drives->select(dir_access->get_current_drive());
		}
	}
	dir->set_text(dir_access->get_current_dir(false));

	// Disable "Open" button only when selecting file(s) mode.
	get_ok_button()->set_disabled(_is_open_should_be_disabled());
	switch (mode) {
		case FILE_MODE_OPEN_FILE:
		case FILE_MODE_OPEN_FILES:
			set_ok_button_text(TTR("Open"));
			break;
		case FILE_MODE_OPEN_DIR:
			set_ok_button_text(TTR("Select Current Folder"));
			break;
		case FILE_MODE_OPEN_ANY:
		case FILE_MODE_SAVE_FILE:
			// FIXME: Implement, or refactor to avoid duplication with set_mode
			break;
	}
}

void EditorFileDialog::_dir_submitted(String p_dir) {
	dir_access->change_dir(p_dir);
	invalidate();
	update_dir();
	_push_history();
}

void EditorFileDialog::_file_submitted(const String &p_file) {
	_action_pressed();
}

void EditorFileDialog::_save_confirm_pressed() {
	String f = dir_access->get_current_dir().path_join(file->get_text());
	_save_to_recent();
	hide();
	emit_signal(SNAME("file_selected"), f);
}

void EditorFileDialog::_post_popup() {
	ConfirmationDialog::_post_popup();

	// Check if the current path doesn't exist and correct it.
	String current = dir_access->get_current_dir();
	while (!dir_access->dir_exists(current)) {
		current = current.get_base_dir();
	}
	set_current_dir(current);

	if (mode == FILE_MODE_SAVE_FILE) {
		file->grab_focus();
	} else {
		item_list->grab_focus();
	}

	if (mode == FILE_MODE_OPEN_DIR) {
		file_box->set_visible(false);
	} else {
		file_box->set_visible(true);
	}

	if (!get_current_file().is_empty()) {
		_request_single_thumbnail(get_current_dir().path_join(get_current_file()));
	}

	local_history.clear();
	local_history_pos = -1;
	_push_history();

	set_process_shortcut_input(true);
}

void EditorFileDialog::_thumbnail_result(const String &p_path, const Ref<Texture2D> &p_preview, const Ref<Texture2D> &p_small_preview, const Variant &p_udata) {
	if (display_mode == DISPLAY_LIST || p_preview.is_null()) {
		return;
	}

	for (int i = 0; i < item_list->get_item_count(); i++) {
		Dictionary d = item_list->get_item_metadata(i);
		String pname = d["path"];
		if (pname == p_path) {
			item_list->set_item_icon(i, p_preview);
			item_list->set_item_tag_icon(i, Ref<Texture2D>());
		}
	}
}

void EditorFileDialog::_thumbnail_done(const String &p_path, const Ref<Texture2D> &p_preview, const Ref<Texture2D> &p_small_preview, const Variant &p_udata) {
	set_process(false);
	preview_waiting = false;

	if (p_preview.is_valid() && get_current_path() == p_path) {
		preview->set_texture(p_preview);
		if (display_mode == DISPLAY_THUMBNAILS) {
			preview_vb->hide();
		} else {
			preview_vb->show();
		}

	} else {
		preview_vb->hide();
		preview->set_texture(Ref<Texture2D>());
	}
}

void EditorFileDialog::_request_single_thumbnail(const String &p_path) {
	if (!FileAccess::exists(p_path) || !previews_enabled) {
		return;
	}

	set_process(true);
	preview_waiting = true;
	preview_wheel_timeout = 0;
	EditorResourcePreview::get_singleton()->queue_resource_preview(p_path, this, "_thumbnail_done", p_path);
}

void EditorFileDialog::_action_pressed() {
	if (mode == FILE_MODE_OPEN_FILES) {
		String fbase = dir_access->get_current_dir();

		Vector<String> files;
		for (int i = 0; i < item_list->get_item_count(); i++) {
			if (item_list->is_selected(i)) {
				files.push_back(fbase.path_join(item_list->get_item_text(i)));
			}
		}

		if (files.size()) {
			_save_to_recent();
			hide();
			emit_signal(SNAME("files_selected"), files);
		}

		return;
	}

	String file_text = file->get_text();
	String f = file_text.is_absolute_path() ? file_text : dir_access->get_current_dir().path_join(file_text);

	if ((mode == FILE_MODE_OPEN_ANY || mode == FILE_MODE_OPEN_FILE) && dir_access->file_exists(f)) {
		_save_to_recent();
		hide();
		emit_signal(SNAME("file_selected"), f);
	} else if (mode == FILE_MODE_OPEN_ANY || mode == FILE_MODE_OPEN_DIR) {
		String path = dir_access->get_current_dir();

		path = path.replace("\\", "/");

		for (int i = 0; i < item_list->get_item_count(); i++) {
			if (item_list->is_selected(i)) {
				Dictionary d = item_list->get_item_metadata(i);
				if (d["dir"]) {
					path = path.path_join(d["name"]);

					break;
				}
			}
		}

		_save_to_recent();
		hide();
		emit_signal(SNAME("dir_selected"), path);
	}

	if (mode == FILE_MODE_SAVE_FILE) {
		bool valid = false;

		if (filter->get_selected() == filter->get_item_count() - 1) {
			valid = true; // match none
		} else if (filters.size() > 1 && filter->get_selected() == 0) {
			// match all filters
			for (int i = 0; i < filters.size(); i++) {
				String flt = filters[i].get_slice(";", 0);
				for (int j = 0; j < flt.get_slice_count(","); j++) {
					String str = flt.get_slice(",", j).strip_edges();
					if (f.match(str)) {
						valid = true;
						break;
					}
				}
				if (valid) {
					break;
				}
			}
		} else {
			int idx = filter->get_selected();
			if (filters.size() > 1) {
				idx--;
			}
			if (idx >= 0 && idx < filters.size()) {
				String flt = filters[idx].get_slice(";", 0);
				int filterSliceCount = flt.get_slice_count(",");
				for (int j = 0; j < filterSliceCount; j++) {
					String str = (flt.get_slice(",", j).strip_edges());
					if (f.match(str)) {
						valid = true;
						break;
					}
				}

				if (!valid && filterSliceCount > 0) {
					String str = (flt.get_slice(",", 0).strip_edges());
					f += str.substr(1, str.length() - 1);
					_request_single_thumbnail(get_current_dir().path_join(f.get_file()));
					file->set_text(f.get_file());
					valid = true;
				}
			} else {
				valid = true;
			}
		}

		// Add first extension of filter if no valid extension is found.
		if (!valid) {
			int idx = filter->get_selected();
			String flt = filters[idx].get_slice(";", 0);
			String ext = flt.get_slice(",", 0).strip_edges().get_extension();
			f += "." + ext;
		}

		if (dir_access->file_exists(f) && !disable_overwrite_warning) {
			confirm_save->set_text(TTR("File exists, overwrite?"));
			confirm_save->popup_centered(Size2(200, 80));
		} else {
			_save_to_recent();
			hide();
			emit_signal(SNAME("file_selected"), f);
		}
	}
}

void EditorFileDialog::_cancel_pressed() {
	file->set_text("");
	invalidate();
	hide();
}

void EditorFileDialog::_item_selected(int p_item) {
	int current = p_item;
	if (current < 0 || current >= item_list->get_item_count()) {
		return;
	}

	Dictionary d = item_list->get_item_metadata(current);

	if (!d["dir"]) {
		file->set_text(d["name"]);
		_request_single_thumbnail(get_current_dir().path_join(get_current_file()));
	} else if (mode == FILE_MODE_OPEN_DIR) {
		set_ok_button_text(TTR("Select This Folder"));
	}

	get_ok_button()->set_disabled(_is_open_should_be_disabled());
}

void EditorFileDialog::_multi_selected(int p_item, bool p_selected) {
	int current = p_item;
	if (current < 0 || current >= item_list->get_item_count()) {
		return;
	}

	Dictionary d = item_list->get_item_metadata(current);

	if (!d["dir"] && p_selected) {
		file->set_text(d["name"]);
		_request_single_thumbnail(get_current_dir().path_join(get_current_file()));
	}

	get_ok_button()->set_disabled(_is_open_should_be_disabled());
}

void EditorFileDialog::_items_clear_selection(const Vector2 &p_pos, MouseButton p_mouse_button_index) {
	if (p_mouse_button_index != MouseButton::LEFT) {
		return;
	}

	item_list->deselect_all();

	// If nothing is selected, then block Open button.
	switch (mode) {
		case FILE_MODE_OPEN_FILE:
		case FILE_MODE_OPEN_FILES:
			set_ok_button_text(TTR("Open"));
			get_ok_button()->set_disabled(!item_list->is_anything_selected());
			break;

		case FILE_MODE_OPEN_DIR:
			get_ok_button()->set_disabled(false);
			set_ok_button_text(TTR("Select Current Folder"));
			break;

		case FILE_MODE_OPEN_ANY:
		case FILE_MODE_SAVE_FILE:
			// FIXME: Implement, or refactor to avoid duplication with set_mode
			break;
	}
}

void EditorFileDialog::_push_history() {
	local_history.resize(local_history_pos + 1);
	String new_path = dir_access->get_current_dir();
	if (local_history.size() == 0 || new_path != local_history[local_history_pos]) {
		local_history.push_back(new_path);
		local_history_pos++;
		dir_prev->set_disabled(local_history_pos == 0);
		dir_next->set_disabled(true);
	}
}

void EditorFileDialog::_item_dc_selected(int p_item) {
	int current = p_item;
	if (current < 0 || current >= item_list->get_item_count()) {
		return;
	}

	Dictionary d = item_list->get_item_metadata(current);

	if (d["dir"]) {
		dir_access->change_dir(d["name"]);
		call_deferred(SNAME("_update_file_list"));
		call_deferred(SNAME("_update_dir"));

		_push_history();

	} else {
		_action_pressed();
	}
}

void EditorFileDialog::_item_list_item_rmb_clicked(int p_item, const Vector2 &p_pos, MouseButton p_mouse_button_index) {
	if (p_mouse_button_index != MouseButton::RIGHT) {
		return;
	}

	// Right click on specific file(s) or folder(s).
	item_menu->clear();
	item_menu->reset_size();

	// Allow specific actions only on one item.
	bool single_item_selected = item_list->get_selected_items().size() == 1;

	// Disallow deleting the .import folder, Godot kills a cat if you do and it is possibly a senseless novice action.
	bool allow_delete = true;
	for (int i = 0; i < item_list->get_item_count(); i++) {
		if (!item_list->is_selected(i)) {
			continue;
		}
		Dictionary item_meta = item_list->get_item_metadata(i);
		if (String(item_meta["path"]).begins_with(ProjectSettings::get_singleton()->get_project_data_path())) {
			allow_delete = false;
			break;
		}
	}

	if (single_item_selected) {
		item_menu->add_icon_item(theme_cache.action_copy, TTR("Copy Path"), ITEM_MENU_COPY_PATH);
	}
	if (allow_delete) {
		item_menu->add_icon_item(theme_cache.action_delete, TTR("Delete"), ITEM_MENU_DELETE, Key::KEY_DELETE);
	}
	if (single_item_selected) {
		item_menu->add_separator();
		Dictionary item_meta = item_list->get_item_metadata(p_item);
		String item_text = item_meta["dir"] ? TTR("Open in File Manager") : TTR("Show in File Manager");
		item_menu->add_icon_item(theme_cache.filesystem, item_text, ITEM_MENU_SHOW_IN_EXPLORER);
	}

	if (item_menu->get_item_count() > 0) {
		item_menu->set_position(item_list->get_screen_position() + p_pos);
		item_menu->reset_size();
		item_menu->popup();
	}
}

void EditorFileDialog::_item_list_empty_clicked(const Vector2 &p_pos, MouseButton p_mouse_button_index) {
	if (p_mouse_button_index != MouseButton::RIGHT && p_mouse_button_index != MouseButton::LEFT) {
		return;
	}

	// Left or right click on folder background. Deselect all files so that actions are applied on the current folder.
	for (int i = 0; i < item_list->get_item_count(); i++) {
		item_list->deselect(i);
	}

	if (p_mouse_button_index != MouseButton::RIGHT) {
		return;
	}

	item_menu->clear();
	item_menu->reset_size();

	if (can_create_dir) {
		item_menu->add_icon_item(theme_cache.folder, TTR("New Folder..."), ITEM_MENU_NEW_FOLDER, KeyModifierMask::CMD_OR_CTRL | Key::N);
	}
	item_menu->add_icon_item(theme_cache.reload, TTR("Refresh"), ITEM_MENU_REFRESH, Key::F5);
	item_menu->add_separator();
	item_menu->add_icon_item(theme_cache.filesystem, TTR("Open in File Manager"), ITEM_MENU_SHOW_IN_EXPLORER);

	item_menu->set_position(item_list->get_screen_position() + p_pos);
	item_menu->reset_size();
	item_menu->popup();
}

void EditorFileDialog::_item_menu_id_pressed(int p_option) {
	switch (p_option) {
		case ITEM_MENU_COPY_PATH: {
			Dictionary item_meta = item_list->get_item_metadata(item_list->get_current());
			DisplayServer::get_singleton()->clipboard_set(item_meta["path"]);
		} break;

		case ITEM_MENU_DELETE: {
			_delete_items();
		} break;

		case ITEM_MENU_REFRESH: {
			invalidate();
		} break;

		case ITEM_MENU_NEW_FOLDER: {
			_make_dir();
		} break;

		case ITEM_MENU_SHOW_IN_EXPLORER: {
			String path;
			int idx = item_list->get_current();
			if (idx == -1 || item_list->get_selected_items().size() == 0) {
				// Folder background was clicked. Open this folder.
				path = ProjectSettings::get_singleton()->globalize_path(dir_access->get_current_dir());
			} else {
				// Specific item was clicked. Open folders directly, or the folder containing a selected file.
				Dictionary item_meta = item_list->get_item_metadata(idx);
				path = ProjectSettings::get_singleton()->globalize_path(item_meta["path"]);
				if (!item_meta["dir"]) {
					path = path.get_base_dir();
				}
			}
			OS::get_singleton()->shell_open(String("file://") + path);
		} break;
	}
}

bool EditorFileDialog::_is_open_should_be_disabled() {
	if (mode == FILE_MODE_OPEN_ANY || mode == FILE_MODE_SAVE_FILE) {
		return false;
	}

	Vector<int> items = item_list->get_selected_items();
	if (items.size() == 0) {
		return mode != FILE_MODE_OPEN_DIR; // In "Open folder" mode, having nothing selected picks the current folder.
	}

	for (int i = 0; i < items.size(); i++) {
		Dictionary d = item_list->get_item_metadata(items.get(i));

		if (((mode == FILE_MODE_OPEN_FILE || mode == FILE_MODE_OPEN_FILES) && d["dir"]) || (mode == FILE_MODE_OPEN_DIR && !d["dir"])) {
			return true;
		}
	}

	return false;
}

void EditorFileDialog::update_file_name() {
	int idx = filter->get_selected() - 1;
	if ((idx == -1 && filter->get_item_count() == 2) || (filter->get_item_count() > 2 && idx >= 0 && idx < filter->get_item_count() - 2)) {
		if (idx == -1) {
			idx += 1;
		}
		String filter_str = filters[idx];
		String file_str = file->get_text();
		String base_name = file_str.get_basename();
		Vector<String> filter_substr = filter_str.split(";");
		if (filter_substr.size() >= 2) {
			file_str = base_name + "." + filter_substr[0].strip_edges().get_extension().to_lower();
		} else {
			file_str = base_name + "." + filter_str.strip_edges().get_extension().to_lower();
		}
		file->set_text(file_str);
	}
}

// DO NOT USE THIS FUNCTION UNLESS NEEDED, CALL INVALIDATE() INSTEAD.
void EditorFileDialog::update_file_list() {
	int thumbnail_size = EDITOR_GET("filesystem/file_dialog/thumbnail_size");
	thumbnail_size *= EDSCALE;
	Ref<Texture2D> folder_thumbnail;
	Ref<Texture2D> file_thumbnail;

	item_list->clear();

	// Scroll back to the top after opening a directory
	item_list->get_v_scroll_bar()->set_value(0);

	if (display_mode == DISPLAY_THUMBNAILS) {
		item_list->set_max_columns(0);
		item_list->set_icon_mode(ItemList::ICON_MODE_TOP);
		item_list->set_fixed_column_width(thumbnail_size * 3 / 2);
		item_list->set_max_text_lines(2);
		item_list->set_text_overrun_behavior(TextServer::OVERRUN_TRIM_ELLIPSIS);
		item_list->set_fixed_icon_size(Size2(thumbnail_size, thumbnail_size));

		if (thumbnail_size < 64) {
			folder_thumbnail = theme_cache.folder_medium_thumbnail;
			file_thumbnail = theme_cache.file_medium_thumbnail;
		} else {
			folder_thumbnail = theme_cache.folder_big_thumbnail;
			file_thumbnail = theme_cache.file_big_thumbnail;
		}

		preview_vb->hide();

	} else {
		item_list->set_icon_mode(ItemList::ICON_MODE_LEFT);
		item_list->set_max_columns(1);
		item_list->set_max_text_lines(1);
		item_list->set_fixed_column_width(0);
		item_list->set_fixed_icon_size(Size2());
		if (preview->get_texture().is_valid()) {
			preview_vb->show();
		}
	}

	String cdir = dir_access->get_current_dir();

	dir_access->list_dir_begin();

	List<String> files;
	List<String> dirs;

	String item = dir_access->get_next();

	while (!item.is_empty()) {
		if (item == "." || item == "..") {
			item = dir_access->get_next();
			continue;
		}

		if (show_hidden_files) {
			if (!dir_access->current_is_dir()) {
				files.push_back(item);
			} else {
				dirs.push_back(item);
			}
		} else if (!dir_access->current_is_hidden()) {
			String full_path = cdir == "res://" ? item : dir_access->get_current_dir() + "/" + item;
			if (dir_access->current_is_dir() && (!EditorFileSystem::_should_skip_directory(full_path) || Engine::get_singleton()->is_project_manager_hint())) {
				dirs.push_back(item);
			} else {
				files.push_back(item);
			}
		}
		item = dir_access->get_next();
	}

	dirs.sort_custom<NaturalNoCaseComparator>();
	files.sort_custom<NaturalNoCaseComparator>();

	while (!dirs.is_empty()) {
		const String &dir_name = dirs.front()->get();

		item_list->add_item(dir_name);

		if (display_mode == DISPLAY_THUMBNAILS) {
			item_list->set_item_icon(-1, folder_thumbnail);
		} else {
			item_list->set_item_icon(-1, theme_cache.folder);
		}

		Dictionary d;
		d["name"] = dir_name;
		d["path"] = cdir.path_join(dir_name);
		d["dir"] = true;

		item_list->set_item_metadata(-1, d);
		item_list->set_item_icon_modulate(-1, theme_cache.folder_icon_color);

		dirs.pop_front();
	}

	List<String> patterns;
	// build filter
	if (filter->get_selected() == filter->get_item_count() - 1) {
		// match all
	} else if (filters.size() > 1 && filter->get_selected() == 0) {
		// match all filters
		for (int i = 0; i < filters.size(); i++) {
			String f = filters[i].get_slice(";", 0);
			for (int j = 0; j < f.get_slice_count(","); j++) {
				patterns.push_back(f.get_slice(",", j).strip_edges());
			}
		}
	} else {
		int idx = filter->get_selected();
		if (filters.size() > 1) {
			idx--;
		}

		if (idx >= 0 && idx < filters.size()) {
			String f = filters[idx].get_slice(";", 0);
			for (int j = 0; j < f.get_slice_count(","); j++) {
				patterns.push_back(f.get_slice(",", j).strip_edges());
			}
		}
	}

	while (!files.is_empty()) {
		bool match = patterns.is_empty();

		for (const String &E : patterns) {
			if (files.front()->get().matchn(E)) {
				match = true;
				break;
			}
		}

		if (match) {
			item_list->add_item(files.front()->get());

			if (get_icon_func) {
				Ref<Texture2D> icon = get_icon_func(cdir.path_join(files.front()->get()));
				if (display_mode == DISPLAY_THUMBNAILS) {
					item_list->set_item_icon(-1, file_thumbnail);
					item_list->set_item_tag_icon(-1, icon);
				} else {
					item_list->set_item_icon(-1, icon);
				}
			}

			Dictionary d;
			d["name"] = files.front()->get();
			d["dir"] = false;
			String fullpath = cdir.path_join(files.front()->get());
			d["path"] = fullpath;
			item_list->set_item_metadata(-1, d);

			if (display_mode == DISPLAY_THUMBNAILS && previews_enabled) {
				EditorResourcePreview::get_singleton()->queue_resource_preview(fullpath, this, "_thumbnail_result", fullpath);
			}

			if (file->get_text() == files.front()->get()) {
				item_list->set_current(item_list->get_item_count() - 1);
			}
		}

		files.pop_front();
	}

	if (favorites->get_current() >= 0) {
		favorites->deselect(favorites->get_current());
	}

	favorite->set_pressed(false);
	fav_up->set_disabled(true);
	fav_down->set_disabled(true);
	get_ok_button()->set_disabled(_is_open_should_be_disabled());
	for (int i = 0; i < favorites->get_item_count(); i++) {
		if (favorites->get_item_metadata(i) == cdir || favorites->get_item_metadata(i) == cdir + "/") {
			favorites->select(i);
			favorite->set_pressed(true);
			if (i > 0) {
				fav_up->set_disabled(false);
			}
			if (i < favorites->get_item_count() - 1) {
				fav_down->set_disabled(false);
			}
			break;
		}
	}
}

void EditorFileDialog::_filter_selected(int) {
	update_file_name();
	update_file_list();
}

void EditorFileDialog::update_filters() {
	filter->clear();

	if (filters.size() > 1) {
		String all_filters;

		const int max_filters = 5;

		for (int i = 0; i < MIN(max_filters, filters.size()); i++) {
			String flt = filters[i].get_slice(";", 0).strip_edges();
			if (i > 0) {
				all_filters += ", ";
			}
			all_filters += flt;
		}

		if (max_filters < filters.size()) {
			all_filters += ", ...";
		}

		filter->add_item(TTR("All Recognized") + " (" + all_filters + ")");
	}
	for (int i = 0; i < filters.size(); i++) {
		String flt = filters[i].get_slice(";", 0).strip_edges();
		String desc = filters[i].get_slice(";", 1).strip_edges();
		if (desc.length()) {
			filter->add_item(desc + " (" + flt + ")");
		} else {
			filter->add_item("(" + flt + ")");
		}
	}

	filter->add_item(TTR("All Files (*)"));
}

void EditorFileDialog::clear_filters() {
	filters.clear();
	update_filters();
	invalidate();
}

void EditorFileDialog::add_filter(const String &p_filter, const String &p_description) {
	if (p_description.is_empty()) {
		filters.push_back(p_filter);
	} else {
		filters.push_back(vformat("%s ; %s", p_filter, p_description));
	}
	update_filters();
	invalidate();
}

String EditorFileDialog::get_current_dir() const {
	return dir_access->get_current_dir();
}

String EditorFileDialog::get_current_file() const {
	return file->get_text();
}

String EditorFileDialog::get_current_path() const {
	return dir_access->get_current_dir().path_join(file->get_text());
}

void EditorFileDialog::set_current_dir(const String &p_dir) {
	if (p_dir.is_relative_path()) {
		dir_access->change_dir(OS::get_singleton()->get_resource_dir());
	}
	dir_access->change_dir(p_dir);
	update_dir();
	invalidate();
}

void EditorFileDialog::set_current_file(const String &p_file) {
	file->set_text(p_file);
	update_dir();
	invalidate();
	_focus_file_text();

	if (is_visible()) {
		_request_single_thumbnail(get_current_dir().path_join(get_current_file()));
	}
}

void EditorFileDialog::set_current_path(const String &p_path) {
	if (!p_path.size()) {
		return;
	}
	int pos = MAX(p_path.rfind("/"), p_path.rfind("\\"));
	if (pos == -1) {
		set_current_file(p_path);
	} else {
		String path_dir = p_path.substr(0, pos);
		String path_file = p_path.substr(pos + 1, p_path.length());
		set_current_dir(path_dir);
		set_current_file(path_file);
	}
}

void EditorFileDialog::set_file_mode(FileMode p_mode) {
	mode = p_mode;
	switch (mode) {
		case FILE_MODE_OPEN_FILE:
			set_ok_button_text(TTR("Open"));
			set_title(TTR("Open a File"));
			can_create_dir = false;
			break;
		case FILE_MODE_OPEN_FILES:
			set_ok_button_text(TTR("Open"));
			set_title(TTR("Open File(s)"));
			can_create_dir = false;
			break;
		case FILE_MODE_OPEN_DIR:
			set_ok_button_text(TTR("Open"));
			set_title(TTR("Open a Directory"));
			can_create_dir = true;
			break;
		case FILE_MODE_OPEN_ANY:
			set_ok_button_text(TTR("Open"));
			set_title(TTR("Open a File or Directory"));
			can_create_dir = true;
			break;
		case FILE_MODE_SAVE_FILE:
			set_ok_button_text(TTR("Save"));
			set_title(TTR("Save a File"));
			can_create_dir = true;
			break;
	}

	if (mode == FILE_MODE_OPEN_FILES) {
		item_list->set_select_mode(ItemList::SELECT_MULTI);
	} else {
		item_list->set_select_mode(ItemList::SELECT_SINGLE);
	}

	if (can_create_dir) {
		makedir->show();
	} else {
		makedir->hide();
	}
}

EditorFileDialog::FileMode EditorFileDialog::get_file_mode() const {
	return mode;
}

void EditorFileDialog::set_access(Access p_access) {
	ERR_FAIL_INDEX(p_access, 3);
	if (access == p_access) {
		return;
	}
	switch (p_access) {
		case ACCESS_FILESYSTEM: {
			dir_access = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
		} break;
		case ACCESS_RESOURCES: {
			dir_access = DirAccess::create(DirAccess::ACCESS_RESOURCES);
		} break;
		case ACCESS_USERDATA: {
			dir_access = DirAccess::create(DirAccess::ACCESS_USERDATA);
		} break;
	}
	access = p_access;
	_update_drives();
	invalidate();
	update_filters();
	update_dir();
}

void EditorFileDialog::invalidate() {
	if (is_visible()) {
		update_file_list();
		_update_favorites();
		_update_recent();
		invalidated = false;
	} else {
		invalidated = true;
	}
}

EditorFileDialog::Access EditorFileDialog::get_access() const {
	return access;
}

void EditorFileDialog::_make_dir_confirm() {
	const String stripped_dirname = makedirname->get_text().strip_edges();

	if (dir_access->dir_exists(stripped_dirname)) {
		error_dialog->set_text(TTR("Could not create folder. File with that name already exists."));
		error_dialog->popup_centered(Size2(250, 50) * EDSCALE);
		makedirname->set_text(""); // Reset label.
		return;
	}

	Error err = dir_access->make_dir(stripped_dirname);
	if (err == OK) {
		dir_access->change_dir(stripped_dirname);
		invalidate();
		update_filters();
		update_dir();
		_push_history();
		if (access != ACCESS_FILESYSTEM) {
			EditorFileSystem::get_singleton()->scan_changes(); //we created a dir, so rescan changes
		}
	} else {
		error_dialog->set_text(TTR("Could not create folder."));
		error_dialog->popup_centered(Size2(250, 50) * EDSCALE);
	}
	makedirname->set_text(""); // reset label
}

void EditorFileDialog::_make_dir() {
	makedialog->popup_centered(Size2(250, 80) * EDSCALE);
	makedirname->grab_focus();
}

void EditorFileDialog::_delete_items() {
	// Collect the selected folders and files to delete and check them in the deletion dependency dialog.
	Vector<String> folders;
	Vector<String> files;
	for (int i = 0; i < item_list->get_item_count(); i++) {
		if (!item_list->is_selected(i)) {
			continue;
		}
		Dictionary item_meta = item_list->get_item_metadata(i);
		if (item_meta["dir"]) {
			folders.push_back(item_meta["path"]);
		} else {
			files.push_back(item_meta["path"]);
		}
	}
	if (folders.size() + files.size() > 0) {
		if (access == ACCESS_FILESYSTEM) {
			global_remove_dialog->popup_centered();
		} else {
			dep_remove_dialog->reset_size();
			dep_remove_dialog->show(folders, files);
		}
	}
}

void EditorFileDialog::_delete_files_global() {
	// Delete files outside of the project directory without dependency checks.
	for (int i = 0; i < item_list->get_item_count(); i++) {
		if (!item_list->is_selected(i)) {
			continue;
		}
		Dictionary item_meta = item_list->get_item_metadata(i);
		// Only delete empty directories for safety.
		dir_access->remove(item_meta["path"]);
	}
	update_file_list();
}

void EditorFileDialog::_select_drive(int p_idx) {
	String d = drives->get_item_text(p_idx);
	dir_access->change_dir(d);
	file->set_text("");
	invalidate();
	update_dir();
	_push_history();
}

void EditorFileDialog::_update_drives(bool p_select) {
	int dc = dir_access->get_drive_count();
	if (dc == 0 || access != ACCESS_FILESYSTEM) {
		drives->hide();
	} else {
		drives->clear();
		Node *dp = drives->get_parent();
		if (dp) {
			dp->remove_child(drives);
		}
		dp = dir_access->drives_are_shortcuts() ? shortcuts_container : drives_container;
		dp->add_child(drives);
		drives->show();

		for (int i = 0; i < dir_access->get_drive_count(); i++) {
			String d = dir_access->get_drive(i);
			drives->add_item(dir_access->get_drive(i));
		}
		if (p_select) {
			drives->select(dir_access->get_current_drive());
		}
	}
}

void EditorFileDialog::_update_icons() {
	// Update icons.

	mode_thumbnails->set_icon(theme_cache.mode_thumbnails);
	mode_list->set_icon(theme_cache.mode_list);

	if (is_layout_rtl()) {
		dir_prev->set_icon(theme_cache.forward_folder);
		dir_next->set_icon(theme_cache.back_folder);
	} else {
		dir_prev->set_icon(theme_cache.back_folder);
		dir_next->set_icon(theme_cache.forward_folder);
	}
	dir_up->set_icon(theme_cache.parent_folder);

	refresh->set_icon(theme_cache.reload);
	favorite->set_icon(theme_cache.favorite);
	show_hidden->set_icon(theme_cache.toggle_hidden);

	fav_up->set_icon(theme_cache.favorites_up);
	fav_down->set_icon(theme_cache.favorites_down);
}

void EditorFileDialog::_favorite_selected(int p_idx) {
	Error change_dir_result = dir_access->change_dir(favorites->get_item_metadata(p_idx));
	if (change_dir_result != OK) {
		error_dialog->set_text(TTR("Favorited folder does not exist anymore and will be removed."));
		error_dialog->popup_centered(Size2(250, 50) * EDSCALE);

		bool res = (access == ACCESS_RESOURCES);

		Vector<String> favorited = EditorSettings::get_singleton()->get_favorites();
		String dir_to_remove = favorites->get_item_metadata(p_idx);

		bool found = false;
		for (int i = 0; i < favorited.size(); i++) {
			bool cres = favorited[i].begins_with("res://");
			if (cres != res) {
				continue;
			}

			if (favorited[i] == dir_to_remove) {
				found = true;
				break;
			}
		}

		if (found) {
			favorited.erase(favorites->get_item_metadata(p_idx));
			favorites->remove_item(p_idx);
			EditorSettings::get_singleton()->set_favorites(favorited);
		}
	} else {
		update_dir();
		invalidate();
		_push_history();
	}
}

void EditorFileDialog::_favorite_move_up() {
	int current = favorites->get_current();

	if (current > 0 && current < favorites->get_item_count()) {
		Vector<String> favorited = EditorSettings::get_singleton()->get_favorites();

		int a_idx = favorited.find(String(favorites->get_item_metadata(current - 1)));
		int b_idx = favorited.find(String(favorites->get_item_metadata(current)));

		if (a_idx == -1 || b_idx == -1) {
			return;
		}
		SWAP(favorited.write[a_idx], favorited.write[b_idx]);

		EditorSettings::get_singleton()->set_favorites(favorited);

		_update_favorites();
		update_file_list();
	}
}

void EditorFileDialog::_favorite_move_down() {
	int current = favorites->get_current();

	if (current >= 0 && current < favorites->get_item_count() - 1) {
		Vector<String> favorited = EditorSettings::get_singleton()->get_favorites();

		int a_idx = favorited.find(String(favorites->get_item_metadata(current + 1)));
		int b_idx = favorited.find(String(favorites->get_item_metadata(current)));

		if (a_idx == -1 || b_idx == -1) {
			return;
		}
		SWAP(favorited.write[a_idx], favorited.write[b_idx]);

		EditorSettings::get_singleton()->set_favorites(favorited);

		_update_favorites();
		update_file_list();
	}
}

void EditorFileDialog::_update_favorites() {
	bool res = (access == ACCESS_RESOURCES);

	String current = get_current_dir();
	favorites->clear();

	favorite->set_pressed(false);

	Vector<String> favorited = EditorSettings::get_singleton()->get_favorites();
	Vector<String> favorited_paths;
	Vector<String> favorited_names;

	bool fav_changed = false;
	int current_favorite = -1;
	for (int i = 0; i < favorited.size(); i++) {
		bool cres = favorited[i].begins_with("res://");
		if (cres != res) {
			continue;
		}

		if (!dir_access->dir_exists(favorited[i])) {
			// Remove invalid directory from the list of Favorited directories.
			favorited.remove_at(i--);
			fav_changed = true;
			continue;
		}

		// Compute favorite display text.
		String name = favorited[i];
		if (res && name == "res://") {
			if (name == current) {
				current_favorite = favorited_paths.size();
			}
			name = "/";
			favorited_paths.append(favorited[i]);
			favorited_names.append(name);
		} else if (name.ends_with("/")) {
			if (name == current || name == current + "/") {
				current_favorite = favorited_paths.size();
			}
			name = name.substr(0, name.length() - 1);
			name = name.get_file();
			favorited_paths.append(favorited[i]);
			favorited_names.append(name);
		} else {
			// Ignore favorited files.
		}
	}

	if (fav_changed) {
		EditorSettings::get_singleton()->set_favorites(favorited);
	}

	EditorNode::disambiguate_filenames(favorited_paths, favorited_names);

	for (int i = 0; i < favorited_paths.size(); i++) {
		favorites->add_item(favorited_names[i], theme_cache.folder);
		favorites->set_item_metadata(-1, favorited_paths[i]);
		favorites->set_item_icon_modulate(-1, theme_cache.folder_icon_color);

		if (i == current_favorite) {
			favorite->set_pressed(true);
			favorites->set_current(favorites->get_item_count() - 1);
			recent->deselect_all();
		}
	}
}

void EditorFileDialog::_favorite_pressed() {
	bool res = (access == ACCESS_RESOURCES);

	String cd = get_current_dir();
	if (!cd.ends_with("/")) {
		cd += "/";
	}

	Vector<String> favorited = EditorSettings::get_singleton()->get_favorites();

	bool found = false;
	for (int i = 0; i < favorited.size(); i++) {
		bool cres = favorited[i].begins_with("res://");
		if (cres != res) {
			continue;
		}

		if (favorited[i] == cd) {
			found = true;
			break;
		}
	}

	if (found) {
		favorited.erase(cd);
	} else {
		favorited.push_back(cd);
	}

	EditorSettings::get_singleton()->set_favorites(favorited);

	_update_favorites();
}

void EditorFileDialog::_update_recent() {
	recent->clear();

	bool res = (access == ACCESS_RESOURCES);
	Vector<String> recentd = EditorSettings::get_singleton()->get_recent_dirs();
	Vector<String> recentd_paths;
	Vector<String> recentd_names;

	for (int i = 0; i < recentd.size(); i++) {
		bool cres = recentd[i].begins_with("res://");
		if (cres != res) {
			continue;
		}

		if (!dir_access->dir_exists(recentd[i])) {
			// Remove invalid directory from the list of Recent directories.
			recentd.remove_at(i--);
			continue;
		}

		// Compute recent directory display text.
		String name = recentd[i];
		if (res && name == "res://") {
			name = "/";
		} else {
			if (name.ends_with("/")) {
				name = name.substr(0, name.length() - 1);
			}
			name = name.get_file();
		}
		recentd_paths.append(recentd[i]);
		recentd_names.append(name);
	}

	EditorNode::disambiguate_filenames(recentd_paths, recentd_names);

	for (int i = 0; i < recentd_paths.size(); i++) {
		recent->add_item(recentd_names[i], theme_cache.folder);
		recent->set_item_metadata(-1, recentd_paths[i]);
		recent->set_item_icon_modulate(-1, theme_cache.folder_icon_color);
	}
	EditorSettings::get_singleton()->set_recent_dirs(recentd);
}

void EditorFileDialog::_recent_selected(int p_idx) {
	Vector<String> recentd = EditorSettings::get_singleton()->get_recent_dirs();
	ERR_FAIL_INDEX(p_idx, recentd.size());

	dir_access->change_dir(recent->get_item_metadata(p_idx));
	update_file_list();
	update_dir();
	_push_history();
}

void EditorFileDialog::_go_up() {
	dir_access->change_dir(get_current_dir().get_base_dir());
	update_file_list();
	update_dir();
	_push_history();
}

void EditorFileDialog::_go_back() {
	if (local_history_pos <= 0) {
		return;
	}

	local_history_pos--;
	dir_access->change_dir(local_history[local_history_pos]);
	update_file_list();
	update_dir();

	dir_prev->set_disabled(local_history_pos == 0);
	dir_next->set_disabled(local_history_pos == local_history.size() - 1);
}

void EditorFileDialog::_go_forward() {
	if (local_history_pos >= local_history.size() - 1) {
		return;
	}

	local_history_pos++;
	dir_access->change_dir(local_history[local_history_pos]);
	update_file_list();
	update_dir();

	dir_prev->set_disabled(local_history_pos == 0);
	dir_next->set_disabled(local_history_pos == local_history.size() - 1);
}

bool EditorFileDialog::default_show_hidden_files = false;

EditorFileDialog::DisplayMode EditorFileDialog::default_display_mode = DISPLAY_THUMBNAILS;

void EditorFileDialog::set_display_mode(DisplayMode p_mode) {
	if (display_mode == p_mode) {
		return;
	}
	if (p_mode == DISPLAY_THUMBNAILS) {
		mode_list->set_pressed(false);
		mode_thumbnails->set_pressed(true);
	} else {
		mode_thumbnails->set_pressed(false);
		mode_list->set_pressed(true);
	}
	display_mode = p_mode;
	invalidate();
}

EditorFileDialog::DisplayMode EditorFileDialog::get_display_mode() const {
	return display_mode;
}

void EditorFileDialog::_bind_methods() {
	ClassDB::bind_method(D_METHOD("_cancel_pressed"), &EditorFileDialog::_cancel_pressed);

	ClassDB::bind_method(D_METHOD("clear_filters"), &EditorFileDialog::clear_filters);
	ClassDB::bind_method(D_METHOD("add_filter", "filter", "description"), &EditorFileDialog::add_filter, DEFVAL(""));
	ClassDB::bind_method(D_METHOD("get_current_dir"), &EditorFileDialog::get_current_dir);
	ClassDB::bind_method(D_METHOD("get_current_file"), &EditorFileDialog::get_current_file);
	ClassDB::bind_method(D_METHOD("get_current_path"), &EditorFileDialog::get_current_path);
	ClassDB::bind_method(D_METHOD("set_current_dir", "dir"), &EditorFileDialog::set_current_dir);
	ClassDB::bind_method(D_METHOD("set_current_file", "file"), &EditorFileDialog::set_current_file);
	ClassDB::bind_method(D_METHOD("set_current_path", "path"), &EditorFileDialog::set_current_path);
	ClassDB::bind_method(D_METHOD("set_file_mode", "mode"), &EditorFileDialog::set_file_mode);
	ClassDB::bind_method(D_METHOD("get_file_mode"), &EditorFileDialog::get_file_mode);
	ClassDB::bind_method(D_METHOD("get_vbox"), &EditorFileDialog::get_vbox);
	ClassDB::bind_method(D_METHOD("set_access", "access"), &EditorFileDialog::set_access);
	ClassDB::bind_method(D_METHOD("get_access"), &EditorFileDialog::get_access);
	ClassDB::bind_method(D_METHOD("set_show_hidden_files", "show"), &EditorFileDialog::set_show_hidden_files);
	ClassDB::bind_method(D_METHOD("is_showing_hidden_files"), &EditorFileDialog::is_showing_hidden_files);
	ClassDB::bind_method(D_METHOD("_update_file_name"), &EditorFileDialog::update_file_name);
	ClassDB::bind_method(D_METHOD("_update_dir"), &EditorFileDialog::update_dir);
	ClassDB::bind_method(D_METHOD("_update_file_list"), &EditorFileDialog::update_file_list);
	ClassDB::bind_method(D_METHOD("_thumbnail_done"), &EditorFileDialog::_thumbnail_done);
	ClassDB::bind_method(D_METHOD("set_display_mode", "mode"), &EditorFileDialog::set_display_mode);
	ClassDB::bind_method(D_METHOD("get_display_mode"), &EditorFileDialog::get_display_mode);
	ClassDB::bind_method(D_METHOD("_thumbnail_result"), &EditorFileDialog::_thumbnail_result);
	ClassDB::bind_method(D_METHOD("set_disable_overwrite_warning", "disable"), &EditorFileDialog::set_disable_overwrite_warning);
	ClassDB::bind_method(D_METHOD("is_overwrite_warning_disabled"), &EditorFileDialog::is_overwrite_warning_disabled);

	ClassDB::bind_method(D_METHOD("invalidate"), &EditorFileDialog::invalidate);

	ADD_SIGNAL(MethodInfo("file_selected", PropertyInfo(Variant::STRING, "path")));
	ADD_SIGNAL(MethodInfo("files_selected", PropertyInfo(Variant::PACKED_STRING_ARRAY, "paths")));
	ADD_SIGNAL(MethodInfo("dir_selected", PropertyInfo(Variant::STRING, "dir")));

	ADD_PROPERTY(PropertyInfo(Variant::INT, "access", PROPERTY_HINT_ENUM, "Resources,User data,File system"), "set_access", "get_access");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "display_mode", PROPERTY_HINT_ENUM, "Thumbnails,List"), "set_display_mode", "get_display_mode");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "file_mode", PROPERTY_HINT_ENUM, "Open one,Open many,Open folder,Open any,Save"), "set_file_mode", "get_file_mode");
	ADD_PROPERTY(PropertyInfo(Variant::STRING, "current_dir", PROPERTY_HINT_DIR, "", PROPERTY_USAGE_NONE), "set_current_dir", "get_current_dir");
	ADD_PROPERTY(PropertyInfo(Variant::STRING, "current_file", PROPERTY_HINT_FILE, "*", PROPERTY_USAGE_NONE), "set_current_file", "get_current_file");
	ADD_PROPERTY(PropertyInfo(Variant::STRING, "current_path", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NONE), "set_current_path", "get_current_path");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "show_hidden_files"), "set_show_hidden_files", "is_showing_hidden_files");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "disable_overwrite_warning"), "set_disable_overwrite_warning", "is_overwrite_warning_disabled");

	BIND_ENUM_CONSTANT(FILE_MODE_OPEN_FILE);
	BIND_ENUM_CONSTANT(FILE_MODE_OPEN_FILES);
	BIND_ENUM_CONSTANT(FILE_MODE_OPEN_DIR);
	BIND_ENUM_CONSTANT(FILE_MODE_OPEN_ANY);
	BIND_ENUM_CONSTANT(FILE_MODE_SAVE_FILE);

	BIND_ENUM_CONSTANT(ACCESS_RESOURCES);
	BIND_ENUM_CONSTANT(ACCESS_USERDATA);
	BIND_ENUM_CONSTANT(ACCESS_FILESYSTEM);

	BIND_ENUM_CONSTANT(DISPLAY_THUMBNAILS);
	BIND_ENUM_CONSTANT(DISPLAY_LIST);
}

void EditorFileDialog::set_show_hidden_files(bool p_show) {
	if (p_show == show_hidden_files) {
		return;
	}

	EditorSettings::get_singleton()->set("filesystem/file_dialog/show_hidden_files", p_show);
	show_hidden_files = p_show;
	show_hidden->set_pressed(p_show);
	invalidate();
}

bool EditorFileDialog::is_showing_hidden_files() const {
	return show_hidden_files;
}

void EditorFileDialog::set_default_show_hidden_files(bool p_show) {
	default_show_hidden_files = p_show;
}

void EditorFileDialog::set_default_display_mode(DisplayMode p_mode) {
	default_display_mode = p_mode;
}

void EditorFileDialog::_save_to_recent() {
	String cur_dir = get_current_dir();
	Vector<String> recent_new = EditorSettings::get_singleton()->get_recent_dirs();

	const int max = 20;
	int count = 0;
	bool res = cur_dir.begins_with("res://");

	for (int i = 0; i < recent_new.size(); i++) {
		bool cres = recent_new[i].begins_with("res://");
		if (recent_new[i] == cur_dir || (res == cres && count > max)) {
			recent_new.remove_at(i);
			i--;
		} else {
			count++;
		}
	}

	recent_new.insert(0, cur_dir);

	EditorSettings::get_singleton()->set_recent_dirs(recent_new);
}

void EditorFileDialog::set_disable_overwrite_warning(bool p_disable) {
	disable_overwrite_warning = p_disable;
}

bool EditorFileDialog::is_overwrite_warning_disabled() const {
	return disable_overwrite_warning;
}

void EditorFileDialog::set_previews_enabled(bool p_enabled) {
	previews_enabled = p_enabled;
}

bool EditorFileDialog::are_previews_enabled() {
	return previews_enabled;
}

EditorFileDialog::EditorFileDialog() {
	show_hidden_files = default_show_hidden_files;
	display_mode = default_display_mode;
	VBoxContainer *vbc = memnew(VBoxContainer);
	add_child(vbc);

	set_title(TTR("Save a File"));

	ED_SHORTCUT("file_dialog/go_back", TTR("Go Back"), KeyModifierMask::ALT | Key::LEFT);
	ED_SHORTCUT("file_dialog/go_forward", TTR("Go Forward"), KeyModifierMask::ALT | Key::RIGHT);
	ED_SHORTCUT("file_dialog/go_up", TTR("Go Up"), KeyModifierMask::ALT | Key::UP);
	ED_SHORTCUT("file_dialog/refresh", TTR("Refresh"), Key::F5);
	ED_SHORTCUT("file_dialog/toggle_hidden_files", TTR("Toggle Hidden Files"), KeyModifierMask::CMD_OR_CTRL | Key::H);
	ED_SHORTCUT("file_dialog/toggle_favorite", TTR("Toggle Favorite"), KeyModifierMask::ALT | Key::F);
	ED_SHORTCUT("file_dialog/toggle_mode", TTR("Toggle Mode"), KeyModifierMask::ALT | Key::V);
	ED_SHORTCUT("file_dialog/create_folder", TTR("Create Folder"), KeyModifierMask::CMD_OR_CTRL | Key::N);
	ED_SHORTCUT("file_dialog/delete", TTR("Delete"), Key::KEY_DELETE);
	ED_SHORTCUT("file_dialog/focus_path", TTR("Focus Path"), KeyModifierMask::CMD_OR_CTRL | Key::D);
	ED_SHORTCUT("file_dialog/move_favorite_up", TTR("Move Favorite Up"), KeyModifierMask::CMD_OR_CTRL | Key::UP);
	ED_SHORTCUT("file_dialog/move_favorite_down", TTR("Move Favorite Down"), KeyModifierMask::CMD_OR_CTRL | Key::DOWN);

	HBoxContainer *pathhb = memnew(HBoxContainer);

	dir_prev = memnew(Button);
	dir_prev->set_flat(true);
	dir_prev->set_tooltip_text(TTR("Go to previous folder."));
	dir_next = memnew(Button);
	dir_next->set_flat(true);
	dir_next->set_tooltip_text(TTR("Go to next folder."));
	dir_up = memnew(Button);
	dir_up->set_flat(true);
	dir_up->set_tooltip_text(TTR("Go to parent folder."));

	pathhb->add_child(dir_prev);
	pathhb->add_child(dir_next);
	pathhb->add_child(dir_up);

	dir_prev->connect("pressed", callable_mp(this, &EditorFileDialog::_go_back));
	dir_next->connect("pressed", callable_mp(this, &EditorFileDialog::_go_forward));
	dir_up->connect("pressed", callable_mp(this, &EditorFileDialog::_go_up));

	Label *l = memnew(Label(TTR("Path:")));
	l->set_theme_type_variation("HeaderSmall");
	pathhb->add_child(l);

	drives_container = memnew(HBoxContainer);
	pathhb->add_child(drives_container);

	dir = memnew(LineEdit);
	dir->set_structured_text_bidi_override(TextServer::STRUCTURED_TEXT_FILE);
	pathhb->add_child(dir);
	dir->set_h_size_flags(Control::SIZE_EXPAND_FILL);

	refresh = memnew(Button);
	refresh->set_flat(true);
	refresh->set_tooltip_text(TTR("Refresh files."));
	refresh->connect("pressed", callable_mp(this, &EditorFileDialog::update_file_list));
	pathhb->add_child(refresh);

	favorite = memnew(Button);
	favorite->set_flat(true);
	favorite->set_toggle_mode(true);
	favorite->set_tooltip_text(TTR("(Un)favorite current folder."));
	favorite->connect("pressed", callable_mp(this, &EditorFileDialog::_favorite_pressed));
	pathhb->add_child(favorite);

	show_hidden = memnew(Button);
	show_hidden->set_flat(true);
	show_hidden->set_toggle_mode(true);
	show_hidden->set_pressed(is_showing_hidden_files());
	show_hidden->set_tooltip_text(TTR("Toggle the visibility of hidden files."));
	show_hidden->connect("toggled", callable_mp(this, &EditorFileDialog::set_show_hidden_files));
	pathhb->add_child(show_hidden);

	pathhb->add_child(memnew(VSeparator));

	Ref<ButtonGroup> view_mode_group;
	view_mode_group.instantiate();

	mode_thumbnails = memnew(Button);
	mode_thumbnails->set_flat(true);
	mode_thumbnails->connect("pressed", callable_mp(this, &EditorFileDialog::set_display_mode).bind(DISPLAY_THUMBNAILS));
	mode_thumbnails->set_toggle_mode(true);
	mode_thumbnails->set_pressed(display_mode == DISPLAY_THUMBNAILS);
	mode_thumbnails->set_button_group(view_mode_group);
	mode_thumbnails->set_tooltip_text(TTR("View items as a grid of thumbnails."));
	pathhb->add_child(mode_thumbnails);

	mode_list = memnew(Button);
	mode_list->set_flat(true);
	mode_list->connect("pressed", callable_mp(this, &EditorFileDialog::set_display_mode).bind(DISPLAY_LIST));
	mode_list->set_toggle_mode(true);
	mode_list->set_pressed(display_mode == DISPLAY_LIST);
	mode_list->set_button_group(view_mode_group);
	mode_list->set_tooltip_text(TTR("View items as a list."));
	pathhb->add_child(mode_list);

	shortcuts_container = memnew(HBoxContainer);
	pathhb->add_child(shortcuts_container);

	drives = memnew(OptionButton);
	drives->connect("item_selected", callable_mp(this, &EditorFileDialog::_select_drive));
	pathhb->add_child(drives);

	makedir = memnew(Button);
	makedir->set_text(TTR("Create Folder"));
	makedir->connect("pressed", callable_mp(this, &EditorFileDialog::_make_dir));
	pathhb->add_child(makedir);

	list_hb = memnew(HSplitContainer);

	vbc->add_child(pathhb);
	vbc->add_child(list_hb);
	list_hb->set_v_size_flags(Control::SIZE_EXPAND_FILL);

	VSplitContainer *vsc = memnew(VSplitContainer);
	list_hb->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(Control::SIZE_EXPAND_FILL);
	HBoxContainer *fav_hb = memnew(HBoxContainer);
	fav_vb->add_child(fav_hb);

	l = memnew(Label(TTR("Favorites:")));
	l->set_theme_type_variation("HeaderSmall");
	fav_hb->add_child(l);

	fav_hb->add_spacer();
	fav_up = memnew(Button);
	fav_up->set_flat(true);
	fav_hb->add_child(fav_up);
	fav_up->connect("pressed", callable_mp(this, &EditorFileDialog::_favorite_move_up));
	fav_down = memnew(Button);
	fav_down->set_flat(true);
	fav_hb->add_child(fav_down);
	fav_down->connect("pressed", callable_mp(this, &EditorFileDialog::_favorite_move_down));

	favorites = memnew(ItemList);
	fav_vb->add_child(favorites);
	favorites->set_v_size_flags(Control::SIZE_EXPAND_FILL);
	favorites->connect("item_selected", callable_mp(this, &EditorFileDialog::_favorite_selected));

	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(Control::SIZE_EXPAND_FILL);
	recent = memnew(ItemList);
	recent->set_allow_reselect(true);
	rec_vb->add_margin_child(TTR("Recent:"), recent, true);
	recent->connect("item_selected", callable_mp(this, &EditorFileDialog::_recent_selected));

	VBoxContainer *item_vb = memnew(VBoxContainer);
	list_hb->add_child(item_vb);
	item_vb->set_custom_minimum_size(Size2(320, 0) * EDSCALE);

	HBoxContainer *preview_hb = memnew(HBoxContainer);
	preview_hb->set_v_size_flags(Control::SIZE_EXPAND_FILL);
	item_vb->add_child(preview_hb);

	VBoxContainer *list_vb = memnew(VBoxContainer);
	list_vb->set_h_size_flags(Control::SIZE_EXPAND_FILL);

	l = memnew(Label(TTR("Directories & Files:")));
	l->set_theme_type_variation("HeaderSmall");
	list_vb->add_child(l);
	preview_hb->add_child(list_vb);

	// Item (files and folders) list with context menu.

	item_list = memnew(ItemList);
	item_list->set_v_size_flags(Control::SIZE_EXPAND_FILL);
	item_list->connect("item_clicked", callable_mp(this, &EditorFileDialog::_item_list_item_rmb_clicked));
	item_list->connect("empty_clicked", callable_mp(this, &EditorFileDialog::_item_list_empty_clicked));
	item_list->set_allow_rmb_select(true);

	list_vb->add_child(item_list);

	item_menu = memnew(PopupMenu);
	item_menu->connect("id_pressed", callable_mp(this, &EditorFileDialog::_item_menu_id_pressed));
	add_child(item_menu);

	// Other stuff.

	preview_vb = memnew(VBoxContainer);
	preview_hb->add_child(preview_vb);
	CenterContainer *prev_cc = memnew(CenterContainer);
	preview_vb->add_margin_child(TTR("Preview:"), prev_cc);
	preview = memnew(TextureRect);
	prev_cc->add_child(preview);
	preview_vb->hide();

	file_box = memnew(HBoxContainer);

	l = memnew(Label(TTR("File:")));
	l->set_theme_type_variation("HeaderSmall");
	file_box->add_child(l);

	file = memnew(LineEdit);
	file->set_structured_text_bidi_override(TextServer::STRUCTURED_TEXT_FILE);
	file->set_stretch_ratio(4);
	file->set_h_size_flags(Control::SIZE_EXPAND_FILL);
	file_box->add_child(file);
	filter = memnew(OptionButton);
	filter->set_stretch_ratio(3);
	filter->set_h_size_flags(Control::SIZE_EXPAND_FILL);
	filter->set_clip_text(true); // Too many extensions overflow it.
	file_box->add_child(filter);
	file_box->set_h_size_flags(Control::SIZE_EXPAND_FILL);
	item_vb->add_child(file_box);

	dir_access = DirAccess::create(DirAccess::ACCESS_RESOURCES);
	_update_drives();

	connect("confirmed", callable_mp(this, &EditorFileDialog::_action_pressed));
	item_list->connect("item_selected", callable_mp(this, &EditorFileDialog::_item_selected), CONNECT_DEFERRED);
	item_list->connect("multi_selected", callable_mp(this, &EditorFileDialog::_multi_selected), CONNECT_DEFERRED);
	item_list->connect("item_activated", callable_mp(this, &EditorFileDialog::_item_dc_selected).bind());
	item_list->connect("empty_clicked", callable_mp(this, &EditorFileDialog::_items_clear_selection));
	dir->connect("text_submitted", callable_mp(this, &EditorFileDialog::_dir_submitted));
	file->connect("text_submitted", callable_mp(this, &EditorFileDialog::_file_submitted));
	filter->connect("item_selected", callable_mp(this, &EditorFileDialog::_filter_selected));

	confirm_save = memnew(ConfirmationDialog);
	add_child(confirm_save);
	confirm_save->connect("confirmed", callable_mp(this, &EditorFileDialog::_save_confirm_pressed));

	dep_remove_dialog = memnew(DependencyRemoveDialog);
	add_child(dep_remove_dialog);

	global_remove_dialog = memnew(ConfirmationDialog);
	global_remove_dialog->set_text(TTR("Remove the selected files? For safety only files and empty directories can be deleted from here. (Cannot be undone.)\nDepending on your filesystem configuration, the files will either be moved to the system trash or deleted permanently."));
	global_remove_dialog->connect("confirmed", callable_mp(this, &EditorFileDialog::_delete_files_global));
	add_child(global_remove_dialog);

	makedialog = memnew(ConfirmationDialog);
	makedialog->set_title(TTR("Create Folder"));
	VBoxContainer *makevb = memnew(VBoxContainer);
	makedialog->add_child(makevb);

	makedirname = memnew(LineEdit);
	makedirname->set_structured_text_bidi_override(TextServer::STRUCTURED_TEXT_FILE);
	makevb->add_margin_child(TTR("Name:"), makedirname);
	add_child(makedialog);
	makedialog->register_text_enter(makedirname);
	makedialog->connect("confirmed", callable_mp(this, &EditorFileDialog::_make_dir_confirm));
	error_dialog = memnew(AcceptDialog);
	add_child(error_dialog);

	update_filters();
	update_dir();

	set_hide_on_ok(false);
	vbox = vbc;

	if (register_func) {
		register_func(this);
	}
}

EditorFileDialog::~EditorFileDialog() {
	if (unregister_func) {
		unregister_func(this);
	}
}