Use forward-declarations in EditorPlugin where possible

54 files changed, 134 insertions, 31 deletions

diff --git a/editor/editor_audio_buses.h b/editor/editor_audio_buses.h
index 436b391ccd..97e94089cc 100644
--- a/editor/editor_audio_buses.h
+++ b/editor/editor_audio_buses.h
@@ -47,6 +47,7 @@
 #include "scene/gui/tree.h"
 
 class EditorAudioBuses;
+class EditorFileDialog;
 
 class EditorAudioBus : public PanelContainer {
 	GDCLASS(EditorAudioBus, PanelContainer);
diff --git a/editor/editor_build_profile.h b/editor/editor_build_profile.h
index 606c415429..9624f7e44b 100644
--- a/editor/editor_build_profile.h
+++ b/editor/editor_build_profile.h
@@ -117,6 +117,7 @@ public:
 VARIANT_ENUM_CAST(EditorBuildProfile::BuildOption)
 VARIANT_ENUM_CAST(EditorBuildProfile::BuildOptionCategory)
 
+class EditorFileDialog;
 class EditorFileSystemDirectory;
 
 class EditorBuildProfileManager : public AcceptDialog {
diff --git a/editor/editor_feature_profile.h b/editor/editor_feature_profile.h
index 6868c54146..1d79844913 100644
--- a/editor/editor_feature_profile.h
+++ b/editor/editor_feature_profile.h
@@ -40,6 +40,8 @@
 #include "scene/gui/split_container.h"
 #include "scene/gui/tree.h"
 
+class EditorFileDialog;
+
 class EditorFeatureProfile : public RefCounted {
 	GDCLASS(EditorFeatureProfile, RefCounted);
 
diff --git a/editor/editor_node.cpp b/editor/editor_node.cpp
index 1bca1b3c87..227f35597c 100644
--- a/editor/editor_node.cpp
+++ b/editor/editor_node.cpp
@@ -114,6 +114,7 @@
 #include "editor/import/audio_stream_import_settings.h"
 #include "editor/import/dynamic_font_import_settings.h"
 #include "editor/import/editor_import_collada.h"
+#include "editor/import/editor_import_plugin.h"
 #include "editor/import/resource_importer_bitmask.h"
 #include "editor/import/resource_importer_bmfont.h"
 #include "editor/import/resource_importer_csv_translation.h"
diff --git a/editor/editor_plugin.cpp b/editor/editor_plugin.cpp
index 8fca21ae7b..683731f982 100644
--- a/editor/editor_plugin.cpp
+++ b/editor/editor_plugin.cpp
@@ -30,14 +30,18 @@
 
 #include "editor_plugin.h"
 
+#include "editor/debugger/editor_debugger_node.h"
 #include "editor/editor_command_palette.h"
 #include "editor/editor_node.h"
 #include "editor/editor_paths.h"
 #include "editor/editor_resource_preview.h"
 #include "editor/editor_settings.h"
+#include "editor/editor_translation_parser.h"
 #include "editor/editor_undo_redo_manager.h"
 #include "editor/export/editor_export.h"
 #include "editor/filesystem_dock.h"
+#include "editor/import/editor_import_plugin.h"
+#include "editor/import/resource_importer_scene.h"
 #include "editor/plugins/canvas_item_editor_plugin.h"
 #include "editor/plugins/node_3d_editor_plugin.h"
 #include "editor/plugins/script_editor_plugin.h"
diff --git a/editor/editor_plugin.h b/editor/editor_plugin.h
index 753ccedf70..2d8f0c47cb 100644
--- a/editor/editor_plugin.h
+++ b/editor/editor_plugin.h
@@ -32,32 +32,33 @@
 #define EDITOR_PLUGIN_H
 
 #include "core/io/config_file.h"
-#include "editor/debugger/editor_debugger_node.h"
-#include "editor/editor_inspector.h"
-#include "editor/editor_translation_parser.h"
-#include "editor/import/editor_import_plugin.h"
-#include "editor/import/resource_importer_scene.h"
-#include "editor/script_create_dialog.h"
 #include "scene/3d/camera_3d.h"
-#include "scene/main/node.h"
-#include "scene/resources/texture.h"
+#include "scene/gui/control.h"
 
 class Node3D;
-class Camera3D;
+class Button;
+class PopupMenu;
 class EditorCommandPalette;
-class EditorSelection;
 class EditorExport;
-class EditorSettings;
-class EditorImportPlugin;
 class EditorExportPlugin;
+class EditorFileSystem;
+class EditorImportPlugin;
+class EditorInspector;
+class EditorInspectorPlugin;
 class EditorNode3DGizmoPlugin;
+class EditorPaths;
 class EditorResourcePreview;
-class EditorUndoRedoManager;
-class EditorFileSystem;
+class EditorSceneFormatImporter;
+class EditorScenePostImportPlugin;
+class EditorSelection;
+class EditorSettings;
 class EditorToolAddons;
-class EditorPaths;
+class EditorTranslationParserPlugin;
+class EditorUndoRedoManager;
 class FileSystemDock;
+class ScriptCreateDialog;
 class ScriptEditor;
+class VBoxContainer;
 
 class EditorInterface : public Node {
 	GDCLASS(EditorInterface, Node);
diff --git a/editor/editor_run.cpp b/editor/editor_run.cpp
index 41d5d1b0d2..913a0ba104 100644
--- a/editor/editor_run.cpp
+++ b/editor/editor_run.cpp
@@ -31,6 +31,7 @@
 #include "editor_run.h"
 
 #include "core/config/project_settings.h"
+#include "editor/debugger/editor_debugger_node.h"
 #include "editor/editor_node.h"
 #include "editor/editor_settings.h"
 #include "main/main.h"
diff --git a/editor/editor_undo_redo_manager.cpp b/editor/editor_undo_redo_manager.cpp
index 09b567fc68..8dfd8e0528 100644
--- a/editor/editor_undo_redo_manager.cpp
+++ b/editor/editor_undo_redo_manager.cpp
@@ -33,6 +33,7 @@
 #include "core/io/resource.h"
 #include "core/os/os.h"
 #include "core/templates/local_vector.h"
+#include "editor/debugger/editor_debugger_node.h"
 #include "editor/editor_log.h"
 #include "editor/editor_node.h"
 #include "scene/main/node.h"
diff --git a/editor/filesystem_dock.cpp b/editor/filesystem_dock.cpp
index 62bcf0b193..30fa1e8a0d 100644
--- a/editor/filesystem_dock.cpp
+++ b/editor/filesystem_dock.cpp
@@ -42,6 +42,7 @@
 #include "editor/editor_resource_preview.h"
 #include "editor/editor_scale.h"
 #include "editor/editor_settings.h"
+#include "editor/import/resource_importer_scene.h"
 #include "editor/import_dock.h"
 #include "editor/scene_create_dialog.h"
 #include "editor/scene_tree_dock.h"
diff --git a/editor/import/audio_stream_import_settings.cpp b/editor/import/audio_stream_import_settings.cpp
index d94b517003..a8cd4c3e49 100644
--- a/editor/import/audio_stream_import_settings.cpp
+++ b/editor/import/audio_stream_import_settings.cpp
@@ -32,6 +32,7 @@
 #include "editor/audio_stream_preview.h"
 #include "editor/editor_file_system.h"
 #include "editor/editor_scale.h"
+#include "scene/gui/check_box.h"
 
 AudioStreamImportSettings *AudioStreamImportSettings::singleton = nullptr;
 
diff --git a/editor/import/audio_stream_import_settings.h b/editor/import/audio_stream_import_settings.h
index 5e399237ca..fc756c6524 100644
--- a/editor/import/audio_stream_import_settings.h
+++ b/editor/import/audio_stream_import_settings.h
@@ -34,9 +34,12 @@
 #include "editor/editor_plugin.h"
 #include "scene/audio/audio_stream_player.h"
 #include "scene/gui/color_rect.h"
+#include "scene/gui/dialogs.h"
 #include "scene/gui/spin_box.h"
 #include "scene/resources/texture.h"
 
+class CheckBox;
+
 class AudioStreamImportSettings : public ConfirmationDialog {
 	GDCLASS(AudioStreamImportSettings, ConfirmationDialog);
 
diff --git a/editor/plugin_config_dialog.cpp b/editor/plugin_config_dialog.cpp
index a7ebf21cd2..affb31945d 100644
--- a/editor/plugin_config_dialog.cpp
+++ b/editor/plugin_config_dialog.cpp
@@ -36,6 +36,7 @@
 #include "editor/editor_plugin.h"
 #include "editor/editor_scale.h"
 #include "editor/project_settings_editor.h"
+#include "scene/gui/grid_container.h"
 
 void PluginConfigDialog::_clear_fields() {
 	name_edit->set_text("");
diff --git a/editor/plugins/abstract_polygon_2d_editor.h b/editor/plugins/abstract_polygon_2d_editor.h
index 8a3db9d837..8414945223 100644
--- a/editor/plugins/abstract_polygon_2d_editor.h
+++ b/editor/plugins/abstract_polygon_2d_editor.h
@@ -36,6 +36,7 @@
 #include "scene/gui/box_container.h"
 
 class CanvasItemEditor;
+class ConfirmationDialog;
 
 class AbstractPolygon2DEditor : public HBoxContainer {
 	GDCLASS(AbstractPolygon2DEditor, HBoxContainer);
diff --git a/editor/plugins/animation_blend_space_1d_editor.h b/editor/plugins/animation_blend_space_1d_editor.h
index c8b01cb54b..54aa227c96 100644
--- a/editor/plugins/animation_blend_space_1d_editor.h
+++ b/editor/plugins/animation_blend_space_1d_editor.h
@@ -40,7 +40,8 @@
 #include "scene/gui/separator.h"
 #include "scene/gui/tree.h"
 
-class EditorUndoRedoManager;
+class CheckBox;
+class PanelContainer;
 
 class AnimationNodeBlendSpace1DEditor : public AnimationTreeNodeEditorPlugin {
 	GDCLASS(AnimationNodeBlendSpace1DEditor, AnimationTreeNodeEditorPlugin);
diff --git a/editor/plugins/animation_blend_space_2d_editor.cpp b/editor/plugins/animation_blend_space_2d_editor.cpp
index 6f206ff445..3ec8324e1d 100644
--- a/editor/plugins/animation_blend_space_2d_editor.cpp
+++ b/editor/plugins/animation_blend_space_2d_editor.cpp
@@ -42,6 +42,7 @@
 #include "editor/editor_undo_redo_manager.h"
 #include "scene/animation/animation_blend_tree.h"
 #include "scene/animation/animation_player.h"
+#include "scene/gui/grid_container.h"
 #include "scene/gui/menu_button.h"
 #include "scene/gui/panel.h"
 #include "scene/main/window.h"
diff --git a/editor/plugins/animation_blend_space_2d_editor.h b/editor/plugins/animation_blend_space_2d_editor.h
index 1f015a1804..e4512b78a3 100644
--- a/editor/plugins/animation_blend_space_2d_editor.h
+++ b/editor/plugins/animation_blend_space_2d_editor.h
@@ -40,6 +40,10 @@
 #include "scene/gui/separator.h"
 #include "scene/gui/tree.h"
 
+class CheckBox;
+class OptionButton;
+class PanelContainer;
+
 class EditorUndoRedoManager;
 
 class AnimationNodeBlendSpace2DEditor : public AnimationTreeNodeEditorPlugin {
diff --git a/editor/plugins/animation_blend_tree_editor_plugin.h b/editor/plugins/animation_blend_tree_editor_plugin.h
index b55fc3b617..112c824d8e 100644
--- a/editor/plugins/animation_blend_tree_editor_plugin.h
+++ b/editor/plugins/animation_blend_tree_editor_plugin.h
@@ -31,17 +31,22 @@
 #ifndef ANIMATION_BLEND_TREE_EDITOR_PLUGIN_H
 #define ANIMATION_BLEND_TREE_EDITOR_PLUGIN_H
 
-#include "editor/editor_plugin.h"
 #include "editor/plugins/animation_tree_editor_plugin.h"
 #include "scene/animation/animation_blend_tree.h"
 #include "scene/gui/button.h"
 #include "scene/gui/graph_edit.h"
+#include "scene/gui/panel_container.h"
 #include "scene/gui/popup.h"
 #include "scene/gui/tree.h"
 
+class AcceptDialog;
+class CheckBox;
 class ProgressBar;
 class EditorFileDialog;
+class EditorProperty;
 class EditorUndoRedoManager;
+class MenuButton;
+class PanelContainer;
 
 class AnimationNodeBlendTreeEditor : public AnimationTreeNodeEditorPlugin {
 	GDCLASS(AnimationNodeBlendTreeEditor, AnimationTreeNodeEditorPlugin);
diff --git a/editor/plugins/animation_state_machine_editor.h b/editor/plugins/animation_state_machine_editor.h
index d0828a5f52..180f238834 100644
--- a/editor/plugins/animation_state_machine_editor.h
+++ b/editor/plugins/animation_state_machine_editor.h
@@ -31,16 +31,17 @@
 #ifndef ANIMATION_STATE_MACHINE_EDITOR_H
 #define ANIMATION_STATE_MACHINE_EDITOR_H
 
-#include "editor/editor_plugin.h"
 #include "editor/plugins/animation_tree_editor_plugin.h"
 #include "scene/animation/animation_node_state_machine.h"
-#include "scene/gui/button.h"
 #include "scene/gui/graph_edit.h"
 #include "scene/gui/popup.h"
 #include "scene/gui/tree.h"
 
+class ConfirmationDialog;
 class EditorFileDialog;
 class EditorUndoRedoManager;
+class OptionButton;
+class PanelContainer;
 
 class AnimationNodeStateMachineEditor : public AnimationTreeNodeEditorPlugin {
 	GDCLASS(AnimationNodeStateMachineEditor, AnimationTreeNodeEditorPlugin);
diff --git a/editor/plugins/asset_library_editor_plugin.h b/editor/plugins/asset_library_editor_plugin.h
index 070d25e29f..2795892c2e 100644
--- a/editor/plugins/asset_library_editor_plugin.h
+++ b/editor/plugins/asset_library_editor_plugin.h
@@ -50,6 +50,9 @@
 #include "scene/gui/texture_button.h"
 #include "scene/main/http_request.h"
 
+class EditorFileDialog;
+class MenuButton;
+
 class EditorAssetLibraryItem : public PanelContainer {
 	GDCLASS(EditorAssetLibraryItem, PanelContainer);
 
diff --git a/editor/plugins/bit_map_editor_plugin.h b/editor/plugins/bit_map_editor_plugin.h
index b045f8c751..8c65b1b6f1 100644
--- a/editor/plugins/bit_map_editor_plugin.h
+++ b/editor/plugins/bit_map_editor_plugin.h
@@ -31,9 +31,12 @@
 #ifndef BIT_MAP_EDITOR_PLUGIN_H
 #define BIT_MAP_EDITOR_PLUGIN_H
 
+#include "editor/editor_inspector.h"
 #include "editor/editor_plugin.h"
 #include "scene/resources/bit_map.h"
 
+class TextureRect;
+
 class BitMapEditor : public VBoxContainer {
 	GDCLASS(BitMapEditor, VBoxContainer);
 
diff --git a/editor/plugins/canvas_item_editor_plugin.h b/editor/plugins/canvas_item_editor_plugin.h
index ba193a67b8..74d4af9a13 100644
--- a/editor/plugins/canvas_item_editor_plugin.h
+++ b/editor/plugins/canvas_item_editor_plugin.h
@@ -42,8 +42,11 @@
 #include "scene/gui/texture_rect.h"
 #include "scene/main/canvas_item.h"
 
+class AcceptDialog;
+class ConfirmationDialog;
 class EditorData;
 class CanvasItemEditorViewport;
+class MenuButton;
 class ViewPanner;
 
 class CanvasItemEditorSelectedItem : public Object {
diff --git a/editor/plugins/control_editor_plugin.cpp b/editor/plugins/control_editor_plugin.cpp
index 1791f7b420..6af9b85657 100644
--- a/editor/plugins/control_editor_plugin.cpp
+++ b/editor/plugins/control_editor_plugin.cpp
@@ -35,6 +35,7 @@
 #include "editor/editor_settings.h"
 #include "editor/editor_undo_redo_manager.h"
 #include "editor/plugins/canvas_item_editor_plugin.h"
+#include "scene/gui/grid_container.h"
 #include "scene/gui/separator.h"
 
 // Inspector controls.
diff --git a/editor/plugins/control_editor_plugin.h b/editor/plugins/control_editor_plugin.h
index d78773a509..14886e77a4 100644
--- a/editor/plugins/control_editor_plugin.h
+++ b/editor/plugins/control_editor_plugin.h
@@ -31,6 +31,7 @@
 #ifndef CONTROL_EDITOR_PLUGIN_H
 #define CONTROL_EDITOR_PLUGIN_H
 
+#include "editor/editor_inspector.h"
 #include "editor/editor_plugin.h"
 #include "scene/gui/box_container.h"
 #include "scene/gui/button.h"
@@ -45,6 +46,7 @@
 #include "scene/gui/texture_rect.h"
 
 class EditorUndoRedoManager;
+class GridContainer;
 
 // Inspector controls.
 class ControlPositioningWarning : public MarginContainer {
diff --git a/editor/plugins/cpu_particles_2d_editor_plugin.h b/editor/plugins/cpu_particles_2d_editor_plugin.h
index 06ca208463..694162588b 100644
--- a/editor/plugins/cpu_particles_2d_editor_plugin.h
+++ b/editor/plugins/cpu_particles_2d_editor_plugin.h
@@ -36,10 +36,13 @@
 #include "scene/2d/cpu_particles_2d.h"
 #include "scene/gui/box_container.h"
 
-class EditorPlugin;
+class CheckBox;
+class ConfirmationDialog;
 class SpinBox;
 class EditorFileDialog;
 class EditorUndoRedoManager;
+class MenuButton;
+class OptionButton;
 
 class CPUParticles2DEditorPlugin : public EditorPlugin {
 	GDCLASS(CPUParticles2DEditorPlugin, EditorPlugin);
diff --git a/editor/plugins/curve_editor_plugin.h b/editor/plugins/curve_editor_plugin.h
index 5cf3b16a06..5503ce96ff 100644
--- a/editor/plugins/curve_editor_plugin.h
+++ b/editor/plugins/curve_editor_plugin.h
@@ -31,6 +31,7 @@
 #ifndef CURVE_EDITOR_PLUGIN_H
 #define CURVE_EDITOR_PLUGIN_H
 
+#include "editor/editor_inspector.h"
 #include "editor/editor_plugin.h"
 #include "editor/editor_resource_preview.h"
 #include "scene/resources/curve.h"
diff --git a/editor/plugins/gpu_particles_2d_editor_plugin.h b/editor/plugins/gpu_particles_2d_editor_plugin.h
index 0229b57c10..0a0ea21c1f 100644
--- a/editor/plugins/gpu_particles_2d_editor_plugin.h
+++ b/editor/plugins/gpu_particles_2d_editor_plugin.h
@@ -37,8 +37,12 @@
 #include "scene/gui/box_container.h"
 #include "scene/gui/spin_box.h"
 
+class CheckBox;
+class ConfirmationDialog;
 class EditorFileDialog;
 class EditorUndoRedoManager;
+class MenuButton;
+class OptionButton;
 
 class GPUParticles2DEditorPlugin : public EditorPlugin {
 	GDCLASS(GPUParticles2DEditorPlugin, EditorPlugin);
diff --git a/editor/plugins/gpu_particles_3d_editor_plugin.h b/editor/plugins/gpu_particles_3d_editor_plugin.h
index 17bdfa6e3f..e5b264cfe4 100644
--- a/editor/plugins/gpu_particles_3d_editor_plugin.h
+++ b/editor/plugins/gpu_particles_3d_editor_plugin.h
@@ -35,6 +35,10 @@
 #include "scene/3d/gpu_particles_3d.h"
 #include "scene/gui/spin_box.h"
 
+class ConfirmationDialog;
+class HBoxContainer;
+class MenuButton;
+class OptionButton;
 class SceneTreeDialog;
 
 class GPUParticles3DEditorBase : public Control {
diff --git a/editor/plugins/gpu_particles_collision_sdf_editor_plugin.h b/editor/plugins/gpu_particles_collision_sdf_editor_plugin.h
index 684279039a..2c1f49df29 100644
--- a/editor/plugins/gpu_particles_collision_sdf_editor_plugin.h
+++ b/editor/plugins/gpu_particles_collision_sdf_editor_plugin.h
@@ -37,6 +37,7 @@
 
 struct EditorProgress;
 class EditorFileDialog;
+class HBoxContainer;
 
 class GPUParticlesCollisionSDF3DEditorPlugin : public EditorPlugin {
 	GDCLASS(GPUParticlesCollisionSDF3DEditorPlugin, EditorPlugin);
diff --git a/editor/plugins/gradient_editor_plugin.h b/editor/plugins/gradient_editor_plugin.h
index ab191d83e2..f3859e74d3 100644
--- a/editor/plugins/gradient_editor_plugin.h
+++ b/editor/plugins/gradient_editor_plugin.h
@@ -31,6 +31,7 @@
 #ifndef GRADIENT_EDITOR_PLUGIN_H
 #define GRADIENT_EDITOR_PLUGIN_H
 
+#include "editor/editor_inspector.h"
 #include "editor/editor_plugin.h"
 #include "gradient_editor.h"
 
diff --git a/editor/plugins/gradient_texture_2d_editor_plugin.h b/editor/plugins/gradient_texture_2d_editor_plugin.h
index 9faf33152a..0737300498 100644
--- a/editor/plugins/gradient_texture_2d_editor_plugin.h
+++ b/editor/plugins/gradient_texture_2d_editor_plugin.h
@@ -31,6 +31,7 @@
 #ifndef GRADIENT_TEXTURE_2D_EDITOR_PLUGIN_H
 #define GRADIENT_TEXTURE_2D_EDITOR_PLUGIN_H
 
+#include "editor/editor_inspector.h"
 #include "editor/editor_plugin.h"
 #include "editor/editor_spin_slider.h"
 
diff --git a/editor/plugins/material_editor_plugin.h b/editor/plugins/material_editor_plugin.h
index 8e64434d8b..a6321dcf34 100644
--- a/editor/plugins/material_editor_plugin.h
+++ b/editor/plugins/material_editor_plugin.h
@@ -31,6 +31,7 @@
 #ifndef MATERIAL_EDITOR_PLUGIN_H
 #define MATERIAL_EDITOR_PLUGIN_H
 
+#include "editor/editor_inspector.h"
 #include "editor/editor_plugin.h"
 #include "editor/plugins/editor_resource_conversion_plugin.h"
 #include "scene/3d/camera_3d.h"
diff --git a/editor/plugins/mesh_editor_plugin.h b/editor/plugins/mesh_editor_plugin.h
index 6394cb1171..b8d6562c5c 100644
--- a/editor/plugins/mesh_editor_plugin.h
+++ b/editor/plugins/mesh_editor_plugin.h
@@ -31,6 +31,7 @@
 #ifndef MESH_EDITOR_PLUGIN_H
 #define MESH_EDITOR_PLUGIN_H
 
+#include "editor/editor_inspector.h"
 #include "editor/editor_plugin.h"
 #include "scene/3d/camera_3d.h"
 #include "scene/3d/light_3d.h"
diff --git a/editor/plugins/mesh_instance_3d_editor_plugin.h b/editor/plugins/mesh_instance_3d_editor_plugin.h
index 88800227d1..81ba263be0 100644
--- a/editor/plugins/mesh_instance_3d_editor_plugin.h
+++ b/editor/plugins/mesh_instance_3d_editor_plugin.h
@@ -35,6 +35,10 @@
 #include "scene/3d/mesh_instance_3d.h"
 #include "scene/gui/spin_box.h"
 
+class AcceptDialog;
+class ConfirmationDialog;
+class MenuButton;
+
 class MeshInstance3DEditor : public Control {
 	GDCLASS(MeshInstance3DEditor, Control);
 
diff --git a/editor/plugins/multimesh_editor_plugin.h b/editor/plugins/multimesh_editor_plugin.h
index 5773989d0d..76f86cfa5d 100644
--- a/editor/plugins/multimesh_editor_plugin.h
+++ b/editor/plugins/multimesh_editor_plugin.h
@@ -36,6 +36,10 @@
 #include "scene/gui/slider.h"
 #include "scene/gui/spin_box.h"
 
+class AcceptDialog;
+class ConfirmationDialog;
+class MenuButton;
+class OptionButton;
 class SceneTreeDialog;
 
 class MultiMeshEditor : public Control {
diff --git a/editor/plugins/node_3d_editor_plugin.h b/editor/plugins/node_3d_editor_plugin.h
index 5ea1bf6dc1..5c5034a916 100644
--- a/editor/plugins/node_3d_editor_plugin.h
+++ b/editor/plugins/node_3d_editor_plugin.h
@@ -39,6 +39,7 @@
 #include "scene/3d/light_3d.h"
 #include "scene/3d/visual_instance_3d.h"
 #include "scene/3d/world_environment.h"
+#include "scene/gui/box_container.h"
 #include "scene/gui/color_picker.h"
 #include "scene/gui/panel_container.h"
 #include "scene/gui/spin_box.h"
@@ -47,9 +48,14 @@
 #include "scene/resources/fog_material.h"
 #include "scene/resources/sky_material.h"
 
+class AcceptDialog;
+class CheckBox;
+class ConfirmationDialog;
 class EditorData;
+class MenuButton;
 class Node3DEditor;
 class Node3DEditorViewport;
+class OptionButton;
 class SubViewportContainer;
 class DirectionalLight3D;
 class WorldEnvironment;
diff --git a/editor/plugins/path_2d_editor_plugin.h b/editor/plugins/path_2d_editor_plugin.h
index 13eca79010..d2015b2bb8 100644
--- a/editor/plugins/path_2d_editor_plugin.h
+++ b/editor/plugins/path_2d_editor_plugin.h
@@ -33,10 +33,12 @@
 
 #include "editor/editor_plugin.h"
 #include "scene/2d/path_2d.h"
+#include "scene/gui/box_container.h"
 #include "scene/gui/separator.h"
 
 class CanvasItemEditor;
 class EditorUndoRedoManager;
+class MenuButton;
 
 class Path2DEditor : public HBoxContainer {
 	GDCLASS(Path2DEditor, HBoxContainer);
diff --git a/editor/plugins/path_3d_editor_plugin.h b/editor/plugins/path_3d_editor_plugin.h
index 11a640b79f..a2816c89ae 100644
--- a/editor/plugins/path_3d_editor_plugin.h
+++ b/editor/plugins/path_3d_editor_plugin.h
@@ -37,6 +37,8 @@
 #include "scene/3d/path_3d.h"
 #include "scene/gui/separator.h"
 
+class MenuButton;
+
 class Path3DGizmo : public EditorNode3DGizmo {
 	GDCLASS(Path3DGizmo, EditorNode3DGizmo);
 
diff --git a/editor/plugins/polygon_2d_editor_plugin.h b/editor/plugins/polygon_2d_editor_plugin.h
index d878d3f9af..6021401e4f 100644
--- a/editor/plugins/polygon_2d_editor_plugin.h
+++ b/editor/plugins/polygon_2d_editor_plugin.h
@@ -33,11 +33,17 @@
 
 #include "editor/plugins/abstract_polygon_2d_editor.h"
 
+class AcceptDialog;
+class ButtonGroup;
+class HScrollBar;
 class HSlider;
+class MenuButton;
 class Panel;
 class ScrollContainer;
 class SpinBox;
+class TextureRect;
 class ViewPanner;
+class VScrollBar;
 
 class Polygon2DEditor : public AbstractPolygon2DEditor {
 	GDCLASS(Polygon2DEditor, AbstractPolygon2DEditor);
diff --git a/editor/plugins/polygon_3d_editor_plugin.h b/editor/plugins/polygon_3d_editor_plugin.h
index 918072b429..fe8e2ce36d 100644
--- a/editor/plugins/polygon_3d_editor_plugin.h
+++ b/editor/plugins/polygon_3d_editor_plugin.h
@@ -34,10 +34,12 @@
 #include "editor/editor_plugin.h"
 #include "scene/3d/collision_polygon_3d.h"
 #include "scene/3d/mesh_instance_3d.h"
+#include "scene/gui/box_container.h"
 #include "scene/resources/immediate_mesh.h"
 
 class CanvasItemEditor;
 class EditorUndoRedoManager;
+class MenuButton;
 
 class Polygon3DEditor : public HBoxContainer {
 	GDCLASS(Polygon3DEditor, HBoxContainer);
diff --git a/editor/plugins/resource_preloader_editor_plugin.h b/editor/plugins/resource_preloader_editor_plugin.h
index ef80283dae..59641e2561 100644
--- a/editor/plugins/resource_preloader_editor_plugin.h
+++ b/editor/plugins/resource_preloader_editor_plugin.h
@@ -33,6 +33,7 @@
 
 #include "editor/editor_plugin.h"
 #include "scene/gui/dialogs.h"
+#include "scene/gui/panel_container.h"
 #include "scene/gui/tree.h"
 #include "scene/main/resource_preloader.h"
 
diff --git a/editor/plugins/root_motion_editor_plugin.cpp b/editor/plugins/root_motion_editor_plugin.cpp
index de30c4100d..a38a040814 100644
--- a/editor/plugins/root_motion_editor_plugin.cpp
+++ b/editor/plugins/root_motion_editor_plugin.cpp
@@ -30,6 +30,8 @@
 
 #include "root_motion_editor_plugin.h"
 #include "editor/editor_node.h"
+#include "scene/animation/animation_player.h"
+#include "scene/animation/animation_tree.h"
 #include "scene/main/window.h"
 
 void EditorPropertyRootMotion::_confirmed() {
diff --git a/editor/plugins/root_motion_editor_plugin.h b/editor/plugins/root_motion_editor_plugin.h
index 5b8c1d77b3..7134b48c36 100644
--- a/editor/plugins/root_motion_editor_plugin.h
+++ b/editor/plugins/root_motion_editor_plugin.h
@@ -32,9 +32,8 @@
 #define ROOT_MOTION_EDITOR_PLUGIN_H
 
 #include "editor/editor_inspector.h"
-#include "editor/editor_spin_slider.h"
-#include "editor/property_selector.h"
-#include "scene/animation/animation_tree.h"
+
+class Tree;
 
 class EditorPropertyRootMotion : public EditorProperty {
 	GDCLASS(EditorPropertyRootMotion, EditorProperty);
diff --git a/editor/plugins/script_editor_plugin.h b/editor/plugins/script_editor_plugin.h
index a45ce4cc22..3f84ded0a2 100644
--- a/editor/plugins/script_editor_plugin.h
+++ b/editor/plugins/script_editor_plugin.h
@@ -48,6 +48,7 @@
 #include "scene/resources/text_file.h"
 
 class EditorFileDialog;
+class TextureRect;
 
 class EditorSyntaxHighlighter : public SyntaxHighlighter {
 	GDCLASS(EditorSyntaxHighlighter, SyntaxHighlighter)
diff --git a/editor/plugins/shader_editor_plugin.h b/editor/plugins/shader_editor_plugin.h
index 7638778af7..1ae419053e 100644
--- a/editor/plugins/shader_editor_plugin.h
+++ b/editor/plugins/shader_editor_plugin.h
@@ -35,6 +35,7 @@
 
 class HSplitContainer;
 class ItemList;
+class MenuButton;
 class ShaderCreateDialog;
 class TabContainer;
 class TextShaderEditor;
diff --git a/editor/plugins/skeleton_2d_editor_plugin.h b/editor/plugins/skeleton_2d_editor_plugin.h
index 295725b751..6794f72955 100644
--- a/editor/plugins/skeleton_2d_editor_plugin.h
+++ b/editor/plugins/skeleton_2d_editor_plugin.h
@@ -35,6 +35,9 @@
 #include "scene/2d/skeleton_2d.h"
 #include "scene/gui/spin_box.h"
 
+class AcceptDialog;
+class MenuButton;
+
 class Skeleton2DEditor : public Control {
 	GDCLASS(Skeleton2DEditor, Control);
 
diff --git a/editor/plugins/sprite_2d_editor_plugin.h b/editor/plugins/sprite_2d_editor_plugin.h
index b87f108bd2..ae1083ed41 100644
--- a/editor/plugins/sprite_2d_editor_plugin.h
+++ b/editor/plugins/sprite_2d_editor_plugin.h
@@ -35,6 +35,10 @@
 #include "scene/2d/sprite_2d.h"
 #include "scene/gui/spin_box.h"
 
+class AcceptDialog;
+class ConfirmationDialog;
+class MenuButton;
+
 class Sprite2DEditor : public Control {
 	GDCLASS(Sprite2DEditor, Control);
 
diff --git a/editor/plugins/texture_3d_editor_plugin.h b/editor/plugins/texture_3d_editor_plugin.h
index 7795c83c8a..6790f6f2d5 100644
--- a/editor/plugins/texture_3d_editor_plugin.h
+++ b/editor/plugins/texture_3d_editor_plugin.h
@@ -31,6 +31,7 @@
 #ifndef TEXTURE_3D_EDITOR_PLUGIN_H
 #define TEXTURE_3D_EDITOR_PLUGIN_H
 
+#include "editor/editor_inspector.h"
 #include "editor/editor_plugin.h"
 #include "scene/gui/spin_box.h"
 #include "scene/resources/shader.h"
diff --git a/editor/plugins/texture_editor_plugin.h b/editor/plugins/texture_editor_plugin.h
index 9beada556c..d7312bfcb4 100644
--- a/editor/plugins/texture_editor_plugin.h
+++ b/editor/plugins/texture_editor_plugin.h
@@ -31,9 +31,13 @@
 #ifndef TEXTURE_EDITOR_PLUGIN_H
 #define TEXTURE_EDITOR_PLUGIN_H
 
+#include "editor/editor_inspector.h"
 #include "editor/editor_plugin.h"
+#include "scene/gui/margin_container.h"
 #include "scene/resources/texture.h"
 
+class TextureRect;
+
 class TexturePreview : public MarginContainer {
 	GDCLASS(TexturePreview, MarginContainer);
 
diff --git a/editor/plugins/texture_layered_editor_plugin.h b/editor/plugins/texture_layered_editor_plugin.h
index f4dbc104c8..16a2f65386 100644
--- a/editor/plugins/texture_layered_editor_plugin.h
+++ b/editor/plugins/texture_layered_editor_plugin.h
@@ -31,6 +31,7 @@
 #ifndef TEXTURE_LAYERED_EDITOR_PLUGIN_H
 #define TEXTURE_LAYERED_EDITOR_PLUGIN_H
 
+#include "editor/editor_inspector.h"
 #include "editor/editor_plugin.h"
 #include "scene/gui/spin_box.h"
 #include "scene/resources/shader.h"
diff --git a/editor/plugins/texture_region_editor_plugin.h b/editor/plugins/texture_region_editor_plugin.h
index 7eda4f469f..48cbb6b70e 100644
--- a/editor/plugins/texture_region_editor_plugin.h
+++ b/editor/plugins/texture_region_editor_plugin.h
@@ -32,6 +32,7 @@
 #define TEXTURE_REGION_EDITOR_PLUGIN_H
 
 #include "canvas_item_editor_plugin.h"
+#include "editor/editor_inspector.h"
 #include "editor/editor_plugin.h"
 #include "scene/2d/sprite_2d.h"
 #include "scene/3d/sprite_3d.h"
@@ -41,6 +42,7 @@
 
 class ViewPanner;
 class EditorUndoRedoManager;
+class OptionButton;
 
 class TextureRegionEditor : public AcceptDialog {
 	GDCLASS(TextureRegionEditor, AcceptDialog);
diff --git a/editor/plugins/theme_editor_plugin.h b/editor/plugins/theme_editor_plugin.h
index 9f89a047cb..b54aa5de6c 100644
--- a/editor/plugins/theme_editor_plugin.h
+++ b/editor/plugins/theme_editor_plugin.h
@@ -45,6 +45,8 @@
 #include "scene/resources/theme.h"
 
 class EditorFileDialog;
+class PanelContainer;
+class TabContainer;
 
 class ThemeItemImportTree : public VBoxContainer {
 	GDCLASS(ThemeItemImportTree, VBoxContainer);
diff --git a/editor/plugins/visual_shader_editor_plugin.h b/editor/plugins/visual_shader_editor_plugin.h
index f7e033d753..5e21215738 100644
--- a/editor/plugins/visual_shader_editor_plugin.h
+++ b/editor/plugins/visual_shader_editor_plugin.h
@@ -32,20 +32,13 @@
 #define VISUAL_SHADER_EDITOR_PLUGIN_H
 
 #include "editor/editor_plugin.h"
+#include "editor/editor_properties.h"
 #include "editor/plugins/editor_resource_conversion_plugin.h"
 #include "scene/resources/visual_shader.h"
 
-class Button;
-class CodeEdit;
-class CodeHighlighter;
 class CurveEditor;
 class GraphEdit;
 class GraphNode;
-class PopupMenu;
-class PopupPanel;
-class RichTextLabel;
-class TextEdit;
-class Tree;
 
 class VisualShaderEditor;
 class EditorUndoRedoManager;
diff --git a/editor/plugins/voxel_gi_editor_plugin.h b/editor/plugins/voxel_gi_editor_plugin.h
index 43d6f71e26..feff3b4f35 100644
--- a/editor/plugins/voxel_gi_editor_plugin.h
+++ b/editor/plugins/voxel_gi_editor_plugin.h
@@ -37,6 +37,7 @@
 
 class EditorFileDialog;
 struct EditorProgress;
+class HBoxContainer;
 
 class VoxelGIEditorPlugin : public EditorPlugin {
 	GDCLASS(VoxelGIEditorPlugin, EditorPlugin);
diff --git a/editor/scene_tree_dock.h b/editor/scene_tree_dock.h
index 04bb4d93e7..6ec9d31ca8 100644
--- a/editor/scene_tree_dock.h
+++ b/editor/scene_tree_dock.h
@@ -46,6 +46,8 @@
 #include "scene/gui/tree.h"
 #include "scene_tree_editor.h"
 
+class TextureRect;
+
 #include "modules/modules_enabled.gen.h" // For regex.
 #ifdef MODULE_REGEX_ENABLED
 class RenameDialog;