From: Alexis Laferrière <alexis.laf@xymus.net>
Date: Mon, 17 Nov 2014 15:33:18 +0000 (-0500)
Subject: lib/tileset: intro `TileSetFont::text_height`
X-Git-Tag: v0.7.3~31^2~3
X-Git-Url: http://nitlanguage.org?hp=23d0bd4de6419d3f1b71ede4c254b4bc5b0f912c

lib/tileset: intro `TileSetFont::text_height`

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
---

diff --git a/lib/mnit/tileset.nit b/lib/mnit/tileset.nit
index 41872bd..41d8a47 100644
--- a/lib/mnit/tileset.nit
+++ b/lib/mnit/tileset.nit
@@ -87,6 +87,15 @@ class TileSetFont
 
 	# Distance between the beginning of a letter tile and the beginning of the next letter tile
 	fun advance: Numeric do return width.add(hspace)
+
+	# Distance between the top of the first line to the bottom of the last line in `text`
+	fun text_height(text: Text): Numeric
+	do
+		if text.is_empty then return 0
+
+		var n_lines = text.chars.count('\n')
+		return (n_lines+1).mul(height.add(vspace)).sub(vspace)
+	end
 end
 
 redef class Display