From e31190219872a69e4497f8d8f0fb3235c59f826b Mon Sep 17 00:00:00 2001
From: zuu <zuu@openttd.org>
Date: Sun, 9 Jun 2013 12:21:44 +0000
Subject: [PATCH] (svn r25343) -Add: method to count the number of lines
 required to draw a string with line warping

---
 src/gfx.cpp    | 17 +++++++++++++++++
 src/gfx_func.h |  1 +
 2 files changed, 18 insertions(+)

diff --git a/src/gfx.cpp b/src/gfx.cpp
index 962913495e..7cfe082414 100644
--- a/src/gfx.cpp
+++ b/src/gfx.cpp
@@ -882,6 +882,23 @@ int GetStringHeight(StringID str, int maxw)
 	return GetMultilineStringHeight(buffer, GB(tmp, 0, 16), FS_NORMAL);
 }
 
+/**
+ * Calculates number of lines of string. The string is changed to a multiline string if needed.
+ * @param str string to check
+ * @param maxw maximum string width
+ * @return number of lines of string when it is drawn
+ */
+int GetStringLineCount(StringID str, int maxw)
+{
+	char buffer[DRAW_STRING_BUFFER];
+
+	GetString(buffer, str, lastof(buffer));
+
+	uint32 tmp = FormatStringLinebreaks(buffer, lastof(buffer), maxw);
+
+	return 1 + GB(tmp, 0, 16);
+}
+
 /**
  * Calculate string bounding box for multi-line strings.
  * @param str        String to check.
diff --git a/src/gfx_func.h b/src/gfx_func.h
index 65616e618e..42c2b3a5e9 100644
--- a/src/gfx_func.h
+++ b/src/gfx_func.h
@@ -124,6 +124,7 @@ Dimension GetStringBoundingBox(const char *str, FontSize start_fontsize = FS_NOR
 Dimension GetStringBoundingBox(StringID strid);
 uint32 FormatStringLinebreaks(char *str, const char *last, int maxw, FontSize start_fontsize = FS_NORMAL);
 int GetStringHeight(StringID str, int maxw);
+int GetStringLineCount(StringID str, int maxw);
 Dimension GetStringMultiLineBoundingBox(StringID str, const Dimension &suggestion);
 Dimension GetStringMultiLineBoundingBox(const char *str, const Dimension &suggestion);
 void LoadStringWidthTable(bool monospace = false);