Add type icons to editor docs' hierarchy

The "Inherits" and "Inherited by" section of the docs now display the icon of each Object on the side.

Also scales the main class' icon to match title font

2 files changed, 27 insertions, 11 deletions

diff --git a/editor/editor_help.cpp b/editor/editor_help.cpp
index 7fa4303145..a12bf7fe82 100644
--- a/editor/editor_help.cpp
+++ b/editor/editor_help.cpp
@@ -239,6 +239,27 @@ void EditorHelp::_add_type(const String &p_type, const String &p_enum) {
 	class_desc->pop();
 }
 
+void EditorHelp::_add_type_icon(const String &p_type, int p_size) {
+	Ref<Texture2D> icon;
+	if (has_theme_icon(p_type, SNAME("EditorIcons"))) {
+		icon = get_theme_icon(p_type, SNAME("EditorIcons"));
+	} else if (ClassDB::class_exists(p_type) && ClassDB::is_parent_class(p_type, "Object")) {
+		icon = get_theme_icon(SNAME("Object"), SNAME("EditorIcons"));
+	} else {
+		icon = get_theme_icon(SNAME("ArrowRight"), SNAME("EditorIcons"));
+	}
+
+	Vector2i size = Vector2i(icon->get_width(), icon->get_height());
+	if (p_size > 0) {
+		// Ensures icon scales proportionally on both axis, based on icon height.
+		float ratio = p_size / float(size.height);
+		size.width *= ratio;
+		size.height *= ratio;
+	}
+
+	class_desc->add_image(icon, size.width, size.height);
+}
+
 String EditorHelp::_fix_constant(const String &p_constant) const {
 	if (p_constant.strip_edges() == "4294967295") {
 		return "0xFFFFFFFF";
@@ -530,22 +551,13 @@ void EditorHelp::_update_doc() {
 
 	DocData::ClassDoc cd = doc->class_list[edited_class]; // Make a copy, so we can sort without worrying.
 
-	Ref<Texture2D> icon;
-	if (has_theme_icon(edited_class, SNAME("EditorIcons"))) {
-		icon = get_theme_icon(edited_class, SNAME("EditorIcons"));
-	} else if (ClassDB::class_exists(edited_class) && ClassDB::is_parent_class(edited_class, "Object")) {
-		icon = get_theme_icon(SNAME("Object"), SNAME("EditorIcons"));
-	} else {
-		icon = get_theme_icon(SNAME("ArrowRight"), SNAME("EditorIcons"));
-	}
-
 	// Class name
 	section_line.push_back(Pair<String, int>(TTR("Top"), 0));
 	class_desc->push_font(doc_title_font);
 	class_desc->push_font_size(doc_title_font_size);
 	class_desc->push_color(title_color);
 	class_desc->add_text(TTR("Class:") + " ");
-	class_desc->add_image(icon, icon->get_width(), icon->get_height());
+	_add_type_icon(edited_class, doc_title_font_size);
 	class_desc->add_text(" ");
 	class_desc->push_color(headline_color);
 	_add_text(edited_class);
@@ -566,6 +578,8 @@ void EditorHelp::_update_doc() {
 		String inherits = cd.inherits;
 
 		while (!inherits.is_empty()) {
+			_add_type_icon(inherits);
+			class_desc->add_text(" "); // Extra space, otherwise icon borrows hyperlink from _add_type().
 			_add_type(inherits);
 
 			inherits = doc->class_list[inherits].inherits;
@@ -597,7 +611,8 @@ void EditorHelp::_update_doc() {
 				if (prev) {
 					class_desc->add_text(" , ");
 				}
-
+				_add_type_icon(E.value.name);
+				class_desc->add_text(" "); // Extra space, otherwise icon borrows hyperlink from _add_type().
 				_add_type(E.value.name);
 				prev = true;
 			}
diff --git a/editor/editor_help.h b/editor/editor_help.h
index 9f8da938f1..c9c1afb51b 100644
--- a/editor/editor_help.h
+++ b/editor/editor_help.h
@@ -153,6 +153,7 @@ class EditorHelp : public VBoxContainer {
 
 	//void _button_pressed(int p_idx);
 	void _add_type(const String &p_type, const String &p_enum = String());
+	void _add_type_icon(const String &p_type, int p_size = 0);
 	void _add_method(const DocData::MethodDoc &p_method, bool p_overview = true);
 
 	void _add_bulletpoint();