From eaea6466486c2061400c3487d214d65cf500ed4b Mon Sep 17 00:00:00 2001
From: Will Nations <willnationsdev@gmail.com>
Date: Thu, 16 Nov 2017 23:49:39 -0600
Subject: [PATCH] Adding ability for single meta hovering

---
 doc/classes/RichTextLabel.xml | 14 ++++++++++++++
 scene/gui/rich_text_label.cpp | 26 +++++++++++++++++++++++---
 scene/gui/rich_text_label.h   |  3 +++
 3 files changed, 40 insertions(+), 3 deletions(-)

diff --git a/doc/classes/RichTextLabel.xml b/doc/classes/RichTextLabel.xml
index cc644f34cbaa..c95ea11f5fdf 100644
--- a/doc/classes/RichTextLabel.xml
+++ b/doc/classes/RichTextLabel.xml
@@ -374,6 +374,20 @@
 			<description>
 			</description>
 		</signal>
+		<signal name="meta_hover_started">
+			<argument index="0" name="meta" type="Nil">
+			</argument>
+			<description>
+				Triggers when the mouse enters a meta tag. 
+			</description>
+		</signal>
+		<signal name="meta_hover_ended">
+			<argument index="0" name="meta" type="Nil">
+			</argument>
+			<description>
+				Triggers when the mouse exits a meta tag. 
+			</description>
+		</signal>
 	</signals>
 	<constants>
 		<constant name="ALIGN_LEFT" value="0">
diff --git a/scene/gui/rich_text_label.cpp b/scene/gui/rich_text_label.cpp
index 798acb9d52bb..71e02cb2f71c 100644
--- a/scene/gui/rich_text_label.cpp
+++ b/scene/gui/rich_text_label.cpp
@@ -877,11 +877,13 @@ void RichTextLabel::_gui_input(Ref<InputEvent> p_event) {
 		if (main->first_invalid_line < main->lines.size())
 			return;
 
+		int line = 0;
+		Item *item = NULL;
+		bool outside;
+		_find_click(main, m->get_position(), &item, &line, &outside);
+
 		if (selection.click) {
 
-			int line = 0;
-			Item *item = NULL;
-			_find_click(main, m->get_position(), &item, &line);
 			if (!item)
 				return; // do not update
 
@@ -912,6 +914,22 @@ void RichTextLabel::_gui_input(Ref<InputEvent> p_event) {
 			selection.active = true;
 			update();
 		}
+
+		Variant meta;
+		if (item && !outside && _find_meta(item, &meta)) {
+			if (meta_hovering != item) {
+				if (meta_hovering) {
+					emit_signal("meta_hover_ended", current_meta);
+				}
+				meta_hovering = static_cast<ItemMeta *>(item);
+				current_meta = meta;
+				emit_signal("meta_hover_started", meta);
+			}
+		} else if (meta_hovering) {
+			emit_signal("meta_hover_ended", current_meta);
+			meta_hovering = NULL;
+			current_meta = false;
+		}
 	}
 }
 
@@ -1968,6 +1986,8 @@ void RichTextLabel::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "override_selected_font_color"), "set_override_selected_font_color", "is_overriding_selected_font_color");
 
 	ADD_SIGNAL(MethodInfo("meta_clicked", PropertyInfo(Variant::NIL, "meta", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NIL_IS_VARIANT)));
+	ADD_SIGNAL(MethodInfo("meta_hover_started", PropertyInfo(Variant::NIL, "meta", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NIL_IS_VARIANT)));
+	ADD_SIGNAL(MethodInfo("meta_hover_ended", PropertyInfo(Variant::NIL, "meta", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NIL_IS_VARIANT)));
 
 	BIND_ENUM_CONSTANT(ALIGN_LEFT);
 	BIND_ENUM_CONSTANT(ALIGN_CENTER);
diff --git a/scene/gui/rich_text_label.h b/scene/gui/rich_text_label.h
index f9e37b10948a..1096e3f6507d 100644
--- a/scene/gui/rich_text_label.h
+++ b/scene/gui/rich_text_label.h
@@ -225,6 +225,9 @@ class RichTextLabel : public Control {
 
 	Align default_align;
 
+	ItemMeta *meta_hovering;
+	Variant current_meta;
+
 	void _invalidate_current_line(ItemFrame *p_frame);
 	void _validate_line_caches(ItemFrame *p_frame);