From b622dfa956de2604bf514d8f031ac252477cce1e Mon Sep 17 00:00:00 2001
From: Yuri Sizov <yuris@humnom.net>
Date: Thu, 10 Jun 2021 19:48:35 +0300
Subject: [PATCH] Use EditorResourcePicker in the Inspector

Backported from #48854
---
 doc/classes/EditorSpinSlider.xml        |   2 +
 editor/editor_properties.cpp            | 771 ++++--------------------
 editor/editor_properties.h              |  60 +-
 editor/editor_properties_array_dict.cpp |   2 +-
 4 files changed, 126 insertions(+), 709 deletions(-)

diff --git a/doc/classes/EditorSpinSlider.xml b/doc/classes/EditorSpinSlider.xml
index 173d76132c77..50b25ce945f0 100644
--- a/doc/classes/EditorSpinSlider.xml
+++ b/doc/classes/EditorSpinSlider.xml
@@ -1,8 +1,10 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="EditorSpinSlider" inherits="Range" version="3.4">
 	<brief_description>
+		Godot editor's control for editing numeric values.
 	</brief_description>
 	<description>
+		This [Control] node is used in the editor's Inspector dock to allow editing of numeric values. Can be used with [EditorInspectorPlugin] to recreate the same behavior.
 	</description>
 	<tutorials>
 	</tutorials>
diff --git a/editor/editor_properties.cpp b/editor/editor_properties.cpp
index d6c5bd5fcc11..6cbf4889f9b2 100644
--- a/editor/editor_properties.cpp
+++ b/editor/editor_properties.cpp
@@ -2083,426 +2083,64 @@ EditorPropertyRID::EditorPropertyRID() {
 
 ////////////// RESOURCE //////////////////////
 
-void EditorPropertyResource::_file_selected(const String &p_path) {
-	RES res = ResourceLoader::load(p_path);
-
-	ERR_FAIL_COND_MSG(res.is_null(), "Cannot load resource from path '" + p_path + "'.");
-
-	List<PropertyInfo> prop_list;
-	get_edited_object()->get_property_list(&prop_list);
-	String property_types;
-
-	for (List<PropertyInfo>::Element *E = prop_list.front(); E; E = E->next()) {
-		if (E->get().name == get_edited_property() && (E->get().hint & PROPERTY_HINT_RESOURCE_TYPE)) {
-			property_types = E->get().hint_string;
-		}
-	}
-	if (!property_types.empty()) {
-		bool any_type_matches = false;
-		const Vector<String> split_property_types = property_types.split(",");
-		for (int i = 0; i < split_property_types.size(); ++i) {
-			if (res->is_class(split_property_types[i])) {
-				any_type_matches = true;
-				break;
-			}
-		}
-
-		if (!any_type_matches) {
-			EditorNode::get_singleton()->show_warning(vformat(TTR("The selected resource (%s) does not match any type expected for this property (%s)."), res->get_class(), property_types));
-		}
+void EditorPropertyResource::_resource_selected(const RES &p_resource) {
+	if (use_sub_inspector) {
+		bool unfold = !get_edited_object()->editor_is_section_unfolded(get_edited_property());
+		get_edited_object()->editor_set_section_unfold(get_edited_property(), unfold);
+		update_property();
+	} else {
+		emit_signal("resource_selected", get_edited_property(), p_resource);
 	}
-
-	emit_changed(get_edited_property(), res);
-	update_property();
 }
 
-void EditorPropertyResource::_menu_option(int p_which) {
-	//	scene_tree->popup_centered_ratio();
-	switch (p_which) {
-		case OBJ_MENU_LOAD: {
-			if (!file) {
-				file = memnew(EditorFileDialog);
-				file->connect("file_selected", this, "_file_selected");
-				add_child(file);
-			}
-			file->set_mode(EditorFileDialog::MODE_OPEN_FILE);
-			String type = base_type;
-
-			List<String> extensions;
-			for (int i = 0; i < type.get_slice_count(","); i++) {
-				ResourceLoader::get_recognized_extensions_for_type(type.get_slice(",", i), &extensions);
-			}
-
-			Set<String> valid_extensions;
-			for (List<String>::Element *E = extensions.front(); E; E = E->next()) {
-				valid_extensions.insert(E->get());
-			}
-
-			file->clear_filters();
-			for (Set<String>::Element *E = valid_extensions.front(); E; E = E->next()) {
-				file->add_filter("*." + E->get() + " ; " + E->get().to_upper());
-			}
-
-			file->popup_centered_ratio();
-		} break;
-
-		case OBJ_MENU_EDIT: {
-			RES res = get_edited_object()->get(get_edited_property());
+void EditorPropertyResource::_resource_changed(const RES &p_resource) {
+	// Make visual script the correct type.
+	Ref<Script> s = p_resource;
+	if (get_edited_object() && s.is_valid()) {
+		s->call("set_instance_base_type", get_edited_object()->get_class());
+	}
 
-			if (!res.is_null()) {
-				emit_signal("resource_selected", get_edited_property(), res);
-			}
-		} break;
-		case OBJ_MENU_CLEAR: {
+	// Prevent the creation of invalid ViewportTextures when possible.
+	Ref<ViewportTexture> vpt = p_resource;
+	if (vpt.is_valid()) {
+		Resource *r = Object::cast_to<Resource>(get_edited_object());
+		if (r && r->get_path().is_resource_file()) {
+			EditorNode::get_singleton()->show_warning(TTR("Can't create a ViewportTexture on resources saved as a file.\nResource needs to belong to a scene."));
 			emit_changed(get_edited_property(), RES());
 			update_property();
-
-		} break;
-
-		case OBJ_MENU_MAKE_UNIQUE: {
-			RES res_orig = get_edited_object()->get(get_edited_property());
-			if (res_orig.is_null()) {
-				return;
-			}
-
-			List<PropertyInfo> property_list;
-			res_orig->get_property_list(&property_list);
-			List<Pair<String, Variant>> propvalues;
-
-			for (List<PropertyInfo>::Element *E = property_list.front(); E; E = E->next()) {
-				Pair<String, Variant> p;
-				PropertyInfo &pi = E->get();
-				if (pi.usage & PROPERTY_USAGE_STORAGE) {
-					p.first = pi.name;
-					p.second = res_orig->get(pi.name);
-				}
-
-				propvalues.push_back(p);
-			}
-
-			String orig_type = res_orig->get_class();
-
-			Object *inst = ClassDB::instance(orig_type);
-
-			Ref<Resource> res = Ref<Resource>(Object::cast_to<Resource>(inst));
-
-			ERR_FAIL_COND(res.is_null());
-
-			for (List<Pair<String, Variant>>::Element *E = propvalues.front(); E; E = E->next()) {
-				Pair<String, Variant> &p = E->get();
-				res->set(p.first, p.second);
-			}
-
-			emit_changed(get_edited_property(), res);
-			update_property();
-
-		} break;
-
-		case OBJ_MENU_SAVE: {
-			RES res = get_edited_object()->get(get_edited_property());
-			if (res.is_null()) {
-				return;
-			}
-			EditorNode::get_singleton()->save_resource(res);
-		} break;
-
-		case OBJ_MENU_COPY: {
-			RES res = get_edited_object()->get(get_edited_property());
-
-			EditorSettings::get_singleton()->set_resource_clipboard(res);
-
-		} break;
-		case OBJ_MENU_PASTE: {
-			RES res = EditorSettings::get_singleton()->get_resource_clipboard();
-			emit_changed(get_edited_property(), res);
-			update_property();
-
-		} break;
-		case OBJ_MENU_NEW_SCRIPT: {
-			if (Object::cast_to<Node>(get_edited_object())) {
-				EditorNode::get_singleton()->get_scene_tree_dock()->open_script_dialog(Object::cast_to<Node>(get_edited_object()), false);
-			}
-
-		} break;
-		case OBJ_MENU_EXTEND_SCRIPT: {
-			if (Object::cast_to<Node>(get_edited_object())) {
-				EditorNode::get_singleton()->get_scene_tree_dock()->open_script_dialog(Object::cast_to<Node>(get_edited_object()), true);
-			}
-
-		} break;
-		case OBJ_MENU_SHOW_IN_FILE_SYSTEM: {
-			RES res = get_edited_object()->get(get_edited_property());
-
-			FileSystemDock *file_system_dock = EditorNode::get_singleton()->get_filesystem_dock();
-			file_system_dock->navigate_to_path(res->get_path());
-			// Ensure that the FileSystem dock is visible.
-			TabContainer *tab_container = (TabContainer *)file_system_dock->get_parent_control();
-			tab_container->set_current_tab(file_system_dock->get_position_in_parent());
-		} break;
-		default: {
-			RES res = get_edited_object()->get(get_edited_property());
-
-			if (p_which >= CONVERT_BASE_ID) {
-				int to_type = p_which - CONVERT_BASE_ID;
-
-				Vector<Ref<EditorResourceConversionPlugin>> conversions = EditorNode::get_singleton()->find_resource_conversion_plugin(res);
-
-				ERR_FAIL_INDEX(to_type, conversions.size());
-
-				Ref<Resource> new_res = conversions[to_type]->convert(res);
-
-				emit_changed(get_edited_property(), new_res);
-				update_property();
-				break;
-			}
-			ERR_FAIL_COND(inheritors_array.empty());
-
-			String intype = inheritors_array[p_which - TYPE_BASE_ID];
-
-			if (intype == "ViewportTexture") {
-				Resource *r = Object::cast_to<Resource>(get_edited_object());
-				if (r && r->get_path().is_resource_file()) {
-					EditorNode::get_singleton()->show_warning(TTR("Can't create a ViewportTexture on resources saved as a file.\nResource needs to belong to a scene."));
-					return;
-				}
-
-				if (r && !r->is_local_to_scene()) {
-					EditorNode::get_singleton()->show_warning(TTR("Can't create a ViewportTexture on this resource because it's not set as local to scene.\nPlease switch on the 'local to scene' property on it (and all resources containing it up to a node)."));
-					return;
-				}
-
-				if (!scene_tree) {
-					scene_tree = memnew(SceneTreeDialog);
-					Vector<StringName> valid_types;
-					valid_types.push_back("Viewport");
-					scene_tree->get_scene_tree()->set_valid_types(valid_types);
-					scene_tree->get_scene_tree()->set_show_enabled_subscene(true);
-					add_child(scene_tree);
-					scene_tree->connect("selected", this, "_viewport_selected");
-					scene_tree->set_title(TTR("Pick a Viewport"));
-				}
-				scene_tree->popup_centered_ratio();
-
-				return;
-			}
-
-			Variant obj;
-
-			if (ScriptServer::is_global_class(intype)) {
-				obj = ClassDB::instance(ScriptServer::get_global_class_native_base(intype));
-				if (obj) {
-					Ref<Script> script = ResourceLoader::load(ScriptServer::get_global_class_path(intype));
-					if (script.is_valid()) {
-						((Object *)obj)->set_script(script.get_ref_ptr());
-					}
-				}
-			} else {
-				obj = ClassDB::instance(intype);
-			}
-
-			if (!obj) {
-				obj = EditorNode::get_editor_data().instance_custom_type(intype, "Resource");
-			}
-
-			Resource *resp = Object::cast_to<Resource>(obj);
-			ERR_BREAK(!resp);
-			if (get_edited_object() && base_type != String() && base_type == "Script") {
-				//make visual script the right type
-				resp->call("set_instance_base_type", get_edited_object()->get_class());
-			}
-
-			res = RES(resp);
-			emit_changed(get_edited_property(), res);
-			update_property();
-
-		} break;
-	}
-}
-
-void EditorPropertyResource::_resource_preview(const String &p_path, const Ref<Texture> &p_preview, const Ref<Texture> &p_small_preview, ObjectID p_obj) {
-	RES p = get_edited_object()->get(get_edited_property());
-	if (p.is_valid() && p->get_instance_id() == p_obj) {
-		String type = p->get_class_name();
-
-		if (ClassDB::is_parent_class(type, "Script")) {
-			assign->set_text(p->get_path().get_file());
 			return;
 		}
 
-		if (p_preview.is_valid()) {
-			preview->set_margin(MARGIN_LEFT, assign->get_icon()->get_width() + assign->get_stylebox("normal")->get_default_margin(MARGIN_LEFT) + get_constant("hseparation", "Button"));
-			if (type == "GradientTexture") {
-				preview->set_stretch_mode(TextureRect::STRETCH_SCALE);
-				assign->set_custom_minimum_size(Size2(1, 1));
-			} else {
-				preview->set_stretch_mode(TextureRect::STRETCH_KEEP_ASPECT_CENTERED);
-				int thumbnail_size = EditorSettings::get_singleton()->get("filesystem/file_dialog/thumbnail_size");
-				thumbnail_size *= EDSCALE;
-				assign->set_custom_minimum_size(Size2(1, thumbnail_size));
-			}
-			preview->set_texture(p_preview);
-			assign->set_text("");
-		}
-	}
-}
-
-void EditorPropertyResource::_update_menu_items() {
-	//////////////////// UPDATE MENU //////////////////////////
-	RES res = get_edited_object()->get(get_edited_property());
-
-	menu->clear();
-
-	if (get_edited_property() == "script" && base_type == "Script" && Object::cast_to<Node>(get_edited_object())) {
-		menu->add_icon_item(get_icon("ScriptCreate", "EditorIcons"), TTR("New Script"), OBJ_MENU_NEW_SCRIPT);
-		menu->add_icon_item(get_icon("ScriptExtend", "EditorIcons"), TTR("Extend Script"), OBJ_MENU_EXTEND_SCRIPT);
-		menu->add_separator();
-	} else if (base_type != "") {
-		int idx = 0;
-
-		Vector<EditorData::CustomType> custom_resources;
-
-		if (EditorNode::get_editor_data().get_custom_types().has("Resource")) {
-			custom_resources = EditorNode::get_editor_data().get_custom_types()["Resource"];
-		}
-
-		for (int i = 0; i < base_type.get_slice_count(","); i++) {
-			String base = base_type.get_slice(",", i);
-
-			Set<String> valid_inheritors;
-			valid_inheritors.insert(base);
-			List<StringName> inheritors;
-			ClassDB::get_inheriters_from_class(base.strip_edges(), &inheritors);
-
-			for (int j = 0; j < custom_resources.size(); j++) {
-				inheritors.push_back(custom_resources[j].name);
-			}
-
-			List<StringName>::Element *E = inheritors.front();
-			while (E) {
-				valid_inheritors.insert(E->get());
-				E = E->next();
-			}
-
-			List<StringName> global_classes;
-			ScriptServer::get_global_class_list(&global_classes);
-			E = global_classes.front();
-			while (E) {
-				if (EditorNode::get_editor_data().script_class_is_parent(E->get(), base_type)) {
-					valid_inheritors.insert(E->get());
-				}
-				E = E->next();
-			}
-
-			for (Set<String>::Element *F = valid_inheritors.front(); F; F = F->next()) {
-				const String &t = F->get();
-
-				bool is_custom_resource = false;
-				Ref<Texture> icon;
-				if (!custom_resources.empty()) {
-					for (int j = 0; j < custom_resources.size(); j++) {
-						if (custom_resources[j].name == t) {
-							is_custom_resource = true;
-							if (custom_resources[j].icon.is_valid()) {
-								icon = custom_resources[j].icon;
-							}
-							break;
-						}
-					}
-				}
-
-				if (!is_custom_resource && !(ScriptServer::is_global_class(t) || ClassDB::can_instance(t))) {
-					continue;
-				}
-
-				inheritors_array.push_back(t);
-
-				if (!icon.is_valid()) {
-					icon = get_icon(has_icon(t, "EditorIcons") ? t : "Object", "EditorIcons");
-				}
-
-				int id = TYPE_BASE_ID + idx;
-				menu->add_icon_item(icon, vformat(TTR("New %s"), t), id);
-
-				idx++;
-			}
-		}
-
-		if (menu->get_item_count()) {
-			menu->add_separator();
-		}
-	}
-
-	menu->add_icon_item(get_icon("Load", "EditorIcons"), TTR("Load"), OBJ_MENU_LOAD);
-
-	if (!res.is_null()) {
-		menu->add_icon_item(get_icon("Edit", "EditorIcons"), TTR("Edit"), OBJ_MENU_EDIT);
-		menu->add_icon_item(get_icon("Clear", "EditorIcons"), TTR("Clear"), OBJ_MENU_CLEAR);
-		menu->add_icon_item(get_icon("Duplicate", "EditorIcons"), TTR("Make Unique"), OBJ_MENU_MAKE_UNIQUE);
-		menu->add_icon_item(get_icon("Save", "EditorIcons"), TTR("Save"), OBJ_MENU_SAVE);
-		RES r = res;
-		if (r.is_valid() && r->get_path().is_resource_file()) {
-			menu->add_separator();
-			menu->add_item(TTR("Show in FileSystem"), OBJ_MENU_SHOW_IN_FILE_SYSTEM);
-		}
-	}
-
-	RES cb = EditorSettings::get_singleton()->get_resource_clipboard();
-	bool paste_valid = false;
-	if (cb.is_valid()) {
-		if (base_type == "") {
-			paste_valid = true;
-		} else {
-			for (int i = 0; i < base_type.get_slice_count(","); i++) {
-				if (ClassDB::is_parent_class(cb->get_class(), base_type.get_slice(",", i))) {
-					paste_valid = true;
-					break;
-				}
-			}
+		if (r && !r->is_local_to_scene()) {
+			EditorNode::get_singleton()->show_warning(TTR("Can't create a ViewportTexture on this resource because it's not set as local to scene.\nPlease switch on the 'local to scene' property on it (and all resources containing it up to a node)."));
+			emit_changed(get_edited_property(), RES());
+			update_property();
+			return;
 		}
 	}
 
-	if (!res.is_null() || paste_valid) {
-		menu->add_separator();
+	emit_changed(get_edited_property(), p_resource);
+	update_property();
 
-		if (!res.is_null()) {
-			menu->add_item(TTR("Copy"), OBJ_MENU_COPY);
-		}
+	// Automatically suggest setting up the path for a ViewportTexture.
+	if (vpt.is_valid() && vpt->get_viewport_path_in_scene().is_empty()) {
+		if (!scene_tree) {
+			scene_tree = memnew(SceneTreeDialog);
+			scene_tree->set_title(TTR("Pick a Viewport"));
 
-		if (paste_valid) {
-			menu->add_item(TTR("Paste"), OBJ_MENU_PASTE);
-		}
-	}
+			Vector<StringName> valid_types;
+			valid_types.push_back("Viewport");
+			scene_tree->get_scene_tree()->set_valid_types(valid_types);
+			scene_tree->get_scene_tree()->set_show_enabled_subscene(true);
 
-	if (!res.is_null()) {
-		Vector<Ref<EditorResourceConversionPlugin>> conversions = EditorNode::get_singleton()->find_resource_conversion_plugin(res);
-		if (conversions.size()) {
-			menu->add_separator();
+			add_child(scene_tree);
+			scene_tree->connect("selected", this, "_viewport_selected");
 		}
-		for (int i = 0; i < conversions.size(); i++) {
-			String what = conversions[i]->converts_to();
-			Ref<Texture> icon;
-			if (has_icon(what, "EditorIcons")) {
-				icon = get_icon(what, "EditorIcons");
-			} else {
-				icon = get_icon(what, "Resource");
-			}
 
-			menu->add_icon_item(icon, vformat(TTR("Convert To %s"), what), CONVERT_BASE_ID + i);
-		}
+		scene_tree->popup_centered_ratio();
 	}
 }
 
-void EditorPropertyResource::_update_menu() {
-	_update_menu_items();
-
-	Rect2 gt = edit->get_global_rect();
-	menu->set_as_minsize();
-	int ms = menu->get_combined_minimum_size().width;
-	Vector2 popup_pos = gt.position + gt.size - Vector2(ms, 0);
-	menu->set_global_position(popup_pos);
-	menu->popup();
-}
-
 void EditorPropertyResource::_sub_inspector_property_keyed(const String &p_property, const Variant &p_value, bool) {
 	emit_signal("property_keyed_with_value", String(get_edited_property()) + ":" + p_property, p_value, false);
 }
@@ -2515,24 +2153,11 @@ void EditorPropertyResource::_sub_inspector_object_id_selected(int p_id) {
 	emit_signal("object_id_selected", get_edited_property(), p_id);
 }
 
-void EditorPropertyResource::_button_input(const Ref<InputEvent> &p_event) {
-	Ref<InputEventMouseButton> mb = p_event;
-	if (mb.is_valid()) {
-		if (mb->is_pressed() && mb->get_button_index() == BUTTON_RIGHT) {
-			_update_menu_items();
-			Vector2 pos = mb->get_global_position();
-			//pos = assign->get_global_transform().xform(pos);
-			menu->set_as_minsize();
-			menu->set_global_position(pos);
-			menu->popup();
-		}
-	}
-}
-
 void EditorPropertyResource::_open_editor_pressed() {
 	RES res = get_edited_object()->get(get_edited_property());
 	if (res.is_valid()) {
-		EditorNode::get_singleton()->call_deferred("edit_item_resource", res); //may clear the editor so do it deferred
+		// May clear the editor so do it deferred.
+		EditorNode::get_singleton()->call_deferred("edit_item_resource", res);
 	}
 }
 
@@ -2542,10 +2167,10 @@ void EditorPropertyResource::_fold_other_editors(Object *p_self) {
 	}
 
 	RES res = get_edited_object()->get(get_edited_property());
-
 	if (!res.is_valid()) {
 		return;
 	}
+
 	bool use_editor = false;
 	for (int i = 0; i < EditorNode::get_editor_data().get_editor_plugin_count(); i++) {
 		EditorPlugin *ep = EditorNode::get_editor_data().get_editor_plugin(i);
@@ -2553,17 +2178,16 @@ void EditorPropertyResource::_fold_other_editors(Object *p_self) {
 			use_editor = true;
 		}
 	}
-
 	if (!use_editor) {
 		return;
 	}
-	bool unfolded = get_edited_object()->editor_is_section_unfolded(get_edited_property());
 
 	opened_editor = false;
 
+	bool unfolded = get_edited_object()->editor_is_section_unfolded(get_edited_property());
 	if (unfolded) {
-		//refold
-		assign->set_pressed(false);
+		// Refold.
+		resource_picker->set_toggle_pressed(false);
 		get_edited_object()->editor_set_section_unfold(get_edited_property(), false);
 		update_property();
 	}
@@ -2575,6 +2199,7 @@ void EditorPropertyResource::_update_property_bg() {
 	}
 
 	updating_theme = true;
+
 	if (sub_inspector != nullptr) {
 		int count_subinspectors = 0;
 		Node *n = get_parent();
@@ -2604,12 +2229,60 @@ void EditorPropertyResource::_update_property_bg() {
 	updating_theme = false;
 	update();
 }
+
+void EditorPropertyResource::_viewport_selected(const NodePath &p_path) {
+	Node *to_node = get_node(p_path);
+	if (!Object::cast_to<Viewport>(to_node)) {
+		EditorNode::get_singleton()->show_warning(TTR("Selected node is not a Viewport!"));
+		return;
+	}
+
+	Ref<ViewportTexture> vt;
+	vt.instance();
+	vt->set_viewport_path_in_scene(get_tree()->get_edited_scene_root()->get_path_to(to_node));
+	vt->setup_local_to_scene();
+
+	emit_changed(get_edited_property(), vt);
+	update_property();
+}
+
+void EditorPropertyResource::setup(Object *p_object, const String &p_path, const String &p_base_type) {
+	if (resource_picker) {
+		resource_picker->disconnect("resource_selected", this, "_resource_selected");
+		resource_picker->disconnect("resource_changed", this, "_resource_changed");
+		memdelete(resource_picker);
+	}
+
+	if (p_path == "script" && p_base_type == "Script" && Object::cast_to<Node>(p_object)) {
+		EditorScriptPicker *script_picker = memnew(EditorScriptPicker);
+		script_picker->set_script_owner(Object::cast_to<Node>(p_object));
+		resource_picker = script_picker;
+	} else {
+		resource_picker = memnew(EditorResourcePicker);
+	}
+
+	resource_picker->set_base_type(p_base_type);
+	resource_picker->set_editable(true);
+	resource_picker->set_h_size_flags(SIZE_EXPAND_FILL);
+	add_child(resource_picker);
+
+	resource_picker->connect("resource_selected", this, "_resource_selected");
+	resource_picker->connect("resource_changed", this, "_resource_changed");
+
+	for (int i = 0; i < resource_picker->get_child_count(); i++) {
+		Button *b = Object::cast_to<Button>(resource_picker->get_child(i));
+		if (b) {
+			add_focusable(b);
+		}
+	}
+}
+
 void EditorPropertyResource::update_property() {
 	RES res = get_edited_object()->get(get_edited_property());
 
 	if (use_sub_inspector) {
-		if (res.is_valid() != assign->is_toggle_mode()) {
-			assign->set_toggle_mode(res.is_valid());
+		if (res.is_valid() != resource_picker->is_toggle_mode()) {
+			resource_picker->set_toggle_mode(res.is_valid());
 		}
 
 		if (res.is_valid() && get_edited_object()->editor_is_section_unfolded(get_edited_property())) {
@@ -2634,7 +2307,7 @@ void EditorPropertyResource::update_property() {
 				set_bottom_editor(sub_inspector_vbox);
 
 				sub_inspector_vbox->add_child(sub_inspector);
-				assign->set_pressed(true);
+				resource_picker->set_toggle_pressed(true);
 
 				bool use_editor = false;
 				for (int i = 0; i < EditorNode::get_editor_data().get_editor_plugin_count(); i++) {
@@ -2645,7 +2318,7 @@ void EditorPropertyResource::update_property() {
 				}
 
 				if (use_editor) {
-					//open editor directly and hide other open of these
+					// Open editor directly and hide other such editors which are currently open.
 					_open_editor_pressed();
 					if (is_inside_tree()) {
 						get_tree()->call_deferred("call_group", "_editor_resource_properties", "_fold_other_editors", this);
@@ -2667,104 +2340,18 @@ void EditorPropertyResource::update_property() {
 				memdelete(sub_inspector_vbox);
 				sub_inspector = nullptr;
 				sub_inspector_vbox = nullptr;
+
 				if (opened_editor) {
 					EditorNode::get_singleton()->hide_top_editors();
 					opened_editor = false;
 				}
+
 				_update_property_bg();
 			}
 		}
 	}
 
-	preview->set_texture(Ref<Texture>());
-	if (res == RES()) {
-		assign->set_icon(Ref<Texture>());
-		assign->set_text(TTR("[empty]"));
-		assign->set_custom_minimum_size(Size2(1, 1));
-	} else {
-		assign->set_icon(EditorNode::get_singleton()->get_object_icon(res.operator->(), "Object"));
-
-		if (res->get_name() != String()) {
-			assign->set_text(res->get_name());
-		} else if (res->get_path().is_resource_file()) {
-			assign->set_text(res->get_path().get_file());
-			assign->set_tooltip(res->get_path());
-		} else {
-			assign->set_text(res->get_class());
-		}
-
-		if (res->get_path().is_resource_file()) {
-			assign->set_tooltip(res->get_path());
-		}
-
-		//preview will override the above, so called at the end
-		EditorResourcePreview::get_singleton()->queue_edited_resource_preview(res, this, "_resource_preview", res->get_instance_id());
-	}
-}
-
-void EditorPropertyResource::_resource_selected() {
-	RES res = get_edited_object()->get(get_edited_property());
-
-	if (res.is_null()) {
-		edit->set_pressed(true);
-		_update_menu();
-		return;
-	}
-
-	if (use_sub_inspector) {
-		bool unfold = !get_edited_object()->editor_is_section_unfolded(get_edited_property());
-		get_edited_object()->editor_set_section_unfold(get_edited_property(), unfold);
-		update_property();
-	} else {
-		emit_signal("resource_selected", get_edited_property(), res);
-	}
-}
-
-void EditorPropertyResource::setup(const String &p_base_type) {
-	base_type = p_base_type;
-}
-
-void EditorPropertyResource::_notification(int p_what) {
-	if (p_what == NOTIFICATION_ENTER_TREE || p_what == NOTIFICATION_THEME_CHANGED) {
-		if (updating_theme) {
-			return;
-		}
-		Ref<Texture> t = get_icon("select_arrow", "Tree");
-		edit->set_icon(t);
-		_update_property_bg();
-	}
-
-	if (p_what == NOTIFICATION_DRAG_BEGIN) {
-		if (is_visible_in_tree()) {
-			if (_is_drop_valid(get_viewport()->gui_get_drag_data())) {
-				dropping = true;
-				assign->update();
-			}
-		}
-	}
-
-	if (p_what == NOTIFICATION_DRAG_END) {
-		if (dropping) {
-			dropping = false;
-			assign->update();
-		}
-	}
-}
-
-void EditorPropertyResource::_viewport_selected(const NodePath &p_path) {
-	Node *to_node = get_node(p_path);
-	if (!Object::cast_to<Viewport>(to_node)) {
-		EditorNode::get_singleton()->show_warning(TTR("Selected node is not a Viewport!"));
-		return;
-	}
-
-	Ref<ViewportTexture> vt;
-	vt.instance();
-	vt->set_viewport_path_in_scene(get_tree()->get_edited_scene_root()->get_path_to(to_node));
-	vt->setup_local_to_scene();
-
-	emit_changed(get_edited_property(), vt);
-	update_property();
+	resource_picker->set_edited_resource(res);
 }
 
 void EditorPropertyResource::collapse_all_folding() {
@@ -2779,170 +2366,36 @@ void EditorPropertyResource::expand_all_folding() {
 	}
 }
 
-void EditorPropertyResource::_button_draw() {
-	if (dropping) {
-		Color color = get_color("accent_color", "Editor");
-		assign->draw_rect(Rect2(Point2(), assign->get_size()), color, false);
-	}
-}
-
-Variant EditorPropertyResource::get_drag_data_fw(const Point2 &p_point, Control *p_from) {
-	RES res = get_edited_object()->get(get_edited_property());
-	if (res.is_valid()) {
-		return EditorNode::get_singleton()->drag_resource(res, p_from);
-	}
-
-	return Variant();
-}
-
-bool EditorPropertyResource::_is_drop_valid(const Dictionary &p_drag_data) const {
-	String allowed_type = base_type;
-
-	Dictionary drag_data = p_drag_data;
-
-	Ref<Resource> res;
-	if (drag_data.has("type") && String(drag_data["type"]) == "script_list_element") {
-		ScriptEditorBase *se = Object::cast_to<ScriptEditorBase>(drag_data["script_list_element"]);
-		res = se->get_edited_resource();
-	} else if (drag_data.has("type") && String(drag_data["type"]) == "resource") {
-		res = drag_data["resource"];
-	}
-
-	if (res.is_valid()) {
-		for (int i = 0; i < allowed_type.get_slice_count(","); i++) {
-			String at = allowed_type.get_slice(",", i).strip_edges();
-			if (res.is_valid() && ClassDB::is_parent_class(res->get_class(), at)) {
-				return true;
-			}
-		}
-	}
-
-	if (drag_data.has("type") && String(drag_data["type"]) == "files") {
-		Vector<String> files = drag_data["files"];
-
-		if (files.size() == 1) {
-			String file = files[0];
-			String ftype = EditorFileSystem::get_singleton()->get_file_type(file);
-
-			if (ftype != "") {
-				for (int i = 0; i < allowed_type.get_slice_count(","); i++) {
-					String at = allowed_type.get_slice(",", i).strip_edges();
-					if (ClassDB::is_parent_class(ftype, at)) {
-						return true;
-					}
-				}
-			}
-		}
-	}
-
-	return false;
-}
-
-bool EditorPropertyResource::can_drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) const {
-	return _is_drop_valid(p_data);
+void EditorPropertyResource::set_use_sub_inspector(bool p_enable) {
+	use_sub_inspector = p_enable;
 }
-void EditorPropertyResource::drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) {
-	ERR_FAIL_COND(!_is_drop_valid(p_data));
-
-	Dictionary drag_data = p_data;
-
-	Ref<Resource> res;
-	if (drag_data.has("type") && String(drag_data["type"]) == "script_list_element") {
-		ScriptEditorBase *se = Object::cast_to<ScriptEditorBase>(drag_data["script_list_element"]);
-		res = se->get_edited_resource();
-	} else if (drag_data.has("type") && String(drag_data["type"]) == "resource") {
-		res = drag_data["resource"];
-	}
-
-	if (res.is_valid()) {
-		emit_changed(get_edited_property(), res);
-		update_property();
-		return;
-	}
-
-	if (drag_data.has("type") && String(drag_data["type"]) == "files") {
-		Vector<String> files = drag_data["files"];
 
-		if (files.size() == 1) {
-			String file = files[0];
-			RES file_res = ResourceLoader::load(file);
-			if (file_res.is_valid()) {
-				emit_changed(get_edited_property(), file_res);
-				update_property();
-				return;
+void EditorPropertyResource::_notification(int p_what) {
+	switch (p_what) {
+		case NOTIFICATION_ENTER_TREE:
+		case NOTIFICATION_THEME_CHANGED: {
+			if (!updating_theme) {
+				_update_property_bg();
 			}
-		}
+		} break;
 	}
 }
 
-void EditorPropertyResource::set_use_sub_inspector(bool p_enable) {
-	use_sub_inspector = p_enable;
-}
-
 void EditorPropertyResource::_bind_methods() {
-	ClassDB::bind_method(D_METHOD("_file_selected"), &EditorPropertyResource::_file_selected);
-	ClassDB::bind_method(D_METHOD("_menu_option"), &EditorPropertyResource::_menu_option);
-	ClassDB::bind_method(D_METHOD("_update_menu"), &EditorPropertyResource::_update_menu);
-	ClassDB::bind_method(D_METHOD("_resource_preview"), &EditorPropertyResource::_resource_preview);
 	ClassDB::bind_method(D_METHOD("_resource_selected"), &EditorPropertyResource::_resource_selected);
+	ClassDB::bind_method(D_METHOD("_resource_changed"), &EditorPropertyResource::_resource_changed);
 	ClassDB::bind_method(D_METHOD("_viewport_selected"), &EditorPropertyResource::_viewport_selected);
 	ClassDB::bind_method(D_METHOD("_sub_inspector_property_keyed"), &EditorPropertyResource::_sub_inspector_property_keyed);
 	ClassDB::bind_method(D_METHOD("_sub_inspector_resource_selected"), &EditorPropertyResource::_sub_inspector_resource_selected);
 	ClassDB::bind_method(D_METHOD("_sub_inspector_object_id_selected"), &EditorPropertyResource::_sub_inspector_object_id_selected);
-	ClassDB::bind_method(D_METHOD("get_drag_data_fw"), &EditorPropertyResource::get_drag_data_fw);
-	ClassDB::bind_method(D_METHOD("can_drop_data_fw"), &EditorPropertyResource::can_drop_data_fw);
-	ClassDB::bind_method(D_METHOD("drop_data_fw"), &EditorPropertyResource::drop_data_fw);
-	ClassDB::bind_method(D_METHOD("_button_draw"), &EditorPropertyResource::_button_draw);
+
 	ClassDB::bind_method(D_METHOD("_open_editor_pressed"), &EditorPropertyResource::_open_editor_pressed);
-	ClassDB::bind_method(D_METHOD("_button_input"), &EditorPropertyResource::_button_input);
 	ClassDB::bind_method(D_METHOD("_fold_other_editors"), &EditorPropertyResource::_fold_other_editors);
 }
 
 EditorPropertyResource::EditorPropertyResource() {
-	opened_editor = false;
-	sub_inspector = nullptr;
-	sub_inspector_vbox = nullptr;
 	use_sub_inspector = bool(EDITOR_GET("interface/inspector/open_resources_in_current_inspector"));
 
-	HBoxContainer *hbc = memnew(HBoxContainer);
-	add_child(hbc);
-	assign = memnew(Button);
-	assign->set_flat(true);
-	assign->set_h_size_flags(SIZE_EXPAND_FILL);
-	assign->set_clip_text(true);
-	assign->connect("pressed", this, "_resource_selected");
-	assign->set_drag_forwarding(this);
-	assign->connect("draw", this, "_button_draw");
-	hbc->add_child(assign);
-	add_focusable(assign);
-
-	preview = memnew(TextureRect);
-	preview->set_expand(true);
-	preview->set_anchors_and_margins_preset(PRESET_WIDE);
-	preview->set_margin(MARGIN_TOP, 1);
-	preview->set_margin(MARGIN_BOTTOM, -1);
-	preview->set_margin(MARGIN_RIGHT, -1);
-	// This is required to draw the focus outline in front of the preview, rather than behind.
-	preview->set_draw_behind_parent(true);
-	assign->add_child(preview);
-	assign->connect("gui_input", this, "_button_input");
-
-	menu = memnew(PopupMenu);
-	add_child(menu);
-	edit = memnew(Button);
-	edit->set_flat(true);
-	edit->set_toggle_mode(true);
-	menu->connect("id_pressed", this, "_menu_option");
-	menu->connect("popup_hide", edit, "set_pressed", varray(false));
-	edit->connect("pressed", this, "_update_menu");
-	hbc->add_child(edit);
-	edit->connect("gui_input", this, "_button_input");
-	add_focusable(edit);
-
-	file = nullptr;
-	scene_tree = nullptr;
-	dropping = false;
-
 	add_to_group("_editor_resource_properties");
 }
 
@@ -3348,7 +2801,7 @@ bool EditorInspectorDefaultPlugin::parse_property(Object *p_object, Variant::Typ
 		} break;
 		case Variant::OBJECT: {
 			EditorPropertyResource *editor = memnew(EditorPropertyResource);
-			editor->setup(p_hint == PROPERTY_HINT_RESOURCE_TYPE ? p_hint_text : "Resource");
+			editor->setup(p_object, p_path, p_hint == PROPERTY_HINT_RESOURCE_TYPE ? p_hint_text : "Resource");
 
 			if (p_hint == PROPERTY_HINT_RESOURCE_TYPE) {
 				String open_in_new = EDITOR_GET("interface/inspector/resources_to_open_in_new_inspector");
diff --git a/editor/editor_properties.h b/editor/editor_properties.h
index 9573bf7561e3..71956301c6ef 100644
--- a/editor/editor_properties.h
+++ b/editor/editor_properties.h
@@ -33,6 +33,7 @@
 
 #include "editor/create_dialog.h"
 #include "editor/editor_inspector.h"
+#include "editor/editor_resource_picker.h"
 #include "editor/editor_spin_slider.h"
 #include "editor/property_selector.h"
 #include "editor/scene_tree_editor.h"
@@ -543,65 +544,26 @@ class EditorPropertyRID : public EditorProperty {
 class EditorPropertyResource : public EditorProperty {
 	GDCLASS(EditorPropertyResource, EditorProperty);
 
-	enum MenuOption {
-
-		OBJ_MENU_LOAD = 0,
-		OBJ_MENU_EDIT = 1,
-		OBJ_MENU_CLEAR = 2,
-		OBJ_MENU_MAKE_UNIQUE = 3,
-		OBJ_MENU_SAVE = 4,
-		OBJ_MENU_COPY = 5,
-		OBJ_MENU_PASTE = 6,
-		OBJ_MENU_NEW_SCRIPT = 7,
-		OBJ_MENU_EXTEND_SCRIPT = 8,
-		OBJ_MENU_SHOW_IN_FILE_SYSTEM = 9,
-		TYPE_BASE_ID = 100,
-		CONVERT_BASE_ID = 1000
+	EditorResourcePicker *resource_picker = nullptr;
+	SceneTreeDialog *scene_tree = nullptr;
 
-	};
-
-	Button *assign;
-	TextureRect *preview;
-	Button *edit;
-	PopupMenu *menu;
-	EditorFileDialog *file;
-	Vector<String> inheritors_array;
-	EditorInspector *sub_inspector;
-	VBoxContainer *sub_inspector_vbox;
-
-	bool use_sub_inspector;
-	bool dropping;
-	String base_type;
+	bool use_sub_inspector = false;
+	EditorInspector *sub_inspector = nullptr;
+	VBoxContainer *sub_inspector_vbox = nullptr;
+	bool updating_theme = false;
+	bool opened_editor = false;
 
-	SceneTreeDialog *scene_tree;
+	void _resource_selected(const RES &p_resource);
+	void _resource_changed(const RES &p_resource);
 
-	void _file_selected(const String &p_path);
-	void _menu_option(int p_which);
-	void _resource_preview(const String &p_path, const Ref<Texture> &p_preview, const Ref<Texture> &p_small_preview, ObjectID p_obj);
-	void _resource_selected();
 	void _viewport_selected(const NodePath &p_path);
 
-	void _update_menu_items();
-
-	void _update_menu();
-
 	void _sub_inspector_property_keyed(const String &p_property, const Variant &p_value, bool);
 	void _sub_inspector_resource_selected(const RES &p_resource, const String &p_property);
 	void _sub_inspector_object_id_selected(int p_id);
 
-	void _button_draw();
-	Variant get_drag_data_fw(const Point2 &p_point, Control *p_from);
-	bool _is_drop_valid(const Dictionary &p_drag_data) const;
-	bool can_drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) const;
-	void drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from);
-
-	void _button_input(const Ref<InputEvent> &p_event);
 	void _open_editor_pressed();
 	void _fold_other_editors(Object *p_self);
-
-	bool opened_editor;
-
-	bool updating_theme = false;
 	void _update_property_bg();
 
 protected:
@@ -610,7 +572,7 @@ class EditorPropertyResource : public EditorProperty {
 
 public:
 	virtual void update_property();
-	void setup(const String &p_base_type);
+	void setup(Object *p_object, const String &p_path, const String &p_base_type);
 
 	void collapse_all_folding();
 	void expand_all_folding();
diff --git a/editor/editor_properties_array_dict.cpp b/editor/editor_properties_array_dict.cpp
index 2d1739aa5887..8c79ffd83f89 100644
--- a/editor/editor_properties_array_dict.cpp
+++ b/editor/editor_properties_array_dict.cpp
@@ -783,7 +783,7 @@ void EditorPropertyDictionary::update_property() {
 
 					} else {
 						EditorPropertyResource *editor = memnew(EditorPropertyResource);
-						editor->setup("Resource");
+						editor->setup(object.ptr(), prop_name, "Resource");
 						prop = editor;
 					}