From 3486d5556520d2867c270aa27982e48f84177773 Mon Sep 17 00:00:00 2001
From: Sebastian K <s3bk@protonmail.com>
Date: Tue, 19 May 2020 18:26:17 +0300
Subject: [PATCH] Add a function to merge two outlines

---
 content/src/outline.rs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/content/src/outline.rs b/content/src/outline.rs
index f5bbd58c..8da6c6bd 100644
--- a/content/src/outline.rs
+++ b/content/src/outline.rs
@@ -218,6 +218,26 @@ impl Outline {
     pub fn close_all_contours(&mut self) {
         self.contours.iter_mut().for_each(|contour| contour.close());
     }
+
+    #[inline]
+    pub fn is_empty(&self) -> bool {
+        self.contours.iter().all(Contour::is_empty)
+    }
+
+    /// Appends the contours in another outline to this one.
+    pub fn push_outline(&mut self, other: Outline) {
+        if other.is_empty() {
+            return;
+        }
+
+        if self.is_empty() {
+            self.bounds = other.bounds;
+        } else {
+            self.bounds = self.bounds.union_rect(other.bounds);
+        }
+
+        self.contours.extend(other.contours);
+    }
 }
 
 impl Debug for Outline {