From 02d711eb610a49c0632b874f0de3e868b074f091 Mon Sep 17 00:00:00 2001
From: Vincent <vincent.glize@live.fr>
Date: Tue, 31 Jan 2017 22:57:46 +0100
Subject: [PATCH] RichTextLabel add function remove_line

(cherry picked from commit c20b186e7324616843701ee044e87e72b737b47b)
---
 scene/gui/rich_text_label.cpp | 43 +++++++++++++++++++++++++++++++++++
 scene/gui/rich_text_label.h   |  2 ++
 2 files changed, 45 insertions(+)

diff --git a/scene/gui/rich_text_label.cpp b/scene/gui/rich_text_label.cpp
index c6a44f3f04..f126145b1d 100644
--- a/scene/gui/rich_text_label.cpp
+++ b/scene/gui/rich_text_label.cpp
@@ -1216,6 +1216,28 @@ void RichTextLabel::_add_item(Item *p_item, bool p_enter, bool p_ensure_newline)
 
 }
 
+void RichTextLabel::_remove_item(Item* p_item, const int p_line, const int p_subitem_line) {
+
+
+	int size = p_item->subitems.size();
+	if (size == 0) {
+		p_item->parent->subitems.erase(p_item);
+		if (p_item->type == ITEM_NEWLINE) {
+			current_frame->lines.remove(p_line);
+			for (int i = p_subitem_line; i < current->subitems.size(); i++) {
+				if (current->subitems[i]->line > 0)
+					current->subitems[i]->line--;
+			}
+		}
+	}
+	else {
+		for (int i = 0; i < size; i++) {
+			_remove_item(p_item->subitems.front()->get(), p_line, p_subitem_line);
+		}
+	}
+
+}
+
 void RichTextLabel::add_image(const Ref<Texture>& p_image) {
 
 	if (current->type==ITEM_TABLE)
@@ -1240,6 +1262,26 @@ void RichTextLabel::add_newline() {
 
 }
 
+bool RichTextLabel::remove_line(const int p_line) {
+
+	if (p_line >= current_frame->lines.size() || p_line < 0)
+		return false;
+
+	int lines = p_line * 2;
+
+	if (current->subitems[lines]->type != ITEM_NEWLINE)
+		_remove_item(current->subitems[lines], current->subitems[lines]->line, lines);
+
+	_remove_item(current->subitems[lines], current->subitems[lines]->line, lines);
+
+	if (p_line == 0) {
+		main->lines[0].from = main;
+	}
+
+	main->first_invalid_line = 0;
+	return true;
+}
+
 void RichTextLabel::push_font(const Ref<Font>& p_font) {
 
 	ERR_FAIL_COND(current->type==ITEM_TABLE);
@@ -1908,6 +1950,7 @@ void RichTextLabel::_bind_methods() {
 	ObjectTypeDB::bind_method(_MD("add_text","text"),&RichTextLabel::add_text);
 	ObjectTypeDB::bind_method(_MD("add_image","image:Texture"),&RichTextLabel::add_image);
 	ObjectTypeDB::bind_method(_MD("newline"),&RichTextLabel::add_newline);
+	ObjectTypeDB::bind_method(_MD("remove_line"),&RichTextLabel::remove_line);
 	ObjectTypeDB::bind_method(_MD("push_font","font"),&RichTextLabel::push_font);
 	ObjectTypeDB::bind_method(_MD("push_color","color"),&RichTextLabel::push_color);
 	ObjectTypeDB::bind_method(_MD("push_align","align"),&RichTextLabel::push_align);
diff --git a/scene/gui/rich_text_label.h b/scene/gui/rich_text_label.h
index 1ac008a951..ae1ac48824 100644
--- a/scene/gui/rich_text_label.h
+++ b/scene/gui/rich_text_label.h
@@ -217,6 +217,7 @@ private:
 	void _validate_line_caches(ItemFrame *p_frame);
 
 	void _add_item(Item *p_item, bool p_enter=false,bool p_ensure_newline=false);
+	void _remove_item(Item *p_item, const int p_line, const int p_subitem_line);
 
 
 
@@ -284,6 +285,7 @@ public:
 	void add_text(const String& p_text);
 	void add_image(const Ref<Texture>& p_image);
 	void add_newline();
+	bool remove_line(const int p_line);
 	void push_font(const Ref<Font>& p_font);
 	void push_color(const Color& p_color);
 	void push_underline();