From 7a77adc9fc73f43544bc23f300d2abd382fda67c Mon Sep 17 00:00:00 2001
From: Tavmjong Bah <tavmjong@free.fr>
Date: Wed, 1 Jun 2016 14:21:37 +0200
Subject: Use CSS 'strut' as minimum value of CSS line box height.

(bzr r14935)
---
 src/sp-flowtext.cpp | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'src/sp-flowtext.cpp')

diff --git a/src/sp-flowtext.cpp b/src/sp-flowtext.cpp
index b87507e18..51fb3ae89 100644
--- a/src/sp-flowtext.cpp
+++ b/src/sp-flowtext.cpp
@@ -30,6 +30,8 @@
 #include "text-editing.h"
 #include "sp-text.h"
 
+#include "libnrtype/font-instance.h"
+
 #include "livarot/Shape.h"
 
 #include "display/drawing-text.h"
@@ -339,6 +341,26 @@ void SPFlowtext::_buildLayoutInput(SPObject *root, Shape const *exclusion_shape,
     bool with_indent = false;
 
     if (dynamic_cast<SPFlowpara *>(root)) {
+
+        layout.strut.reset();
+        if (style) {
+            font_instance *font = font_factory::Default()->FaceFromStyle( style );
+            if (font) {
+                font->FontMetrics(layout.strut.ascent, layout.strut.descent, layout.strut.xheight);
+                font->Unref();
+            }
+            layout.strut *= style->font_size.computed;
+            if (style->line_height.normal ) {
+                layout.strut.computeEffective( Inkscape::Text::Layout::LINE_HEIGHT_NORMAL ); 
+            } else if (style->line_height.unit == SP_CSS_UNIT_NONE) {
+                layout.strut.computeEffective( style->line_height.computed );
+            } else {
+                if( style->font_size.computed > 0.0 ) {
+                    layout.strut.computeEffective( style->line_height.computed/style->font_size.computed );
+                }
+            }
+        }
+
         // emulate par-indent with the first char's kern
         SPObject *t = root;
         SPFlowtext *ft = NULL;
-- 
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