From 98f3ef2689de06e8ab8b46a91acfa7dd2056a3a6 Mon Sep 17 00:00:00 2001
From: Alessandro Ghedini <al3xbio@gmail.com>
Date: Mon, 5 Mar 2012 12:19:59 +0100
Subject: Imported Upstream version 0.5.1

---
 src/images/renderedText.vala | 81 ++++++++++++++++++++++++++++----------------
 1 file changed, 51 insertions(+), 30 deletions(-)

(limited to 'src/images/renderedText.vala')

diff --git a/src/images/renderedText.vala b/src/images/renderedText.vala
index 41146d6..e99d26a 100644
--- a/src/images/renderedText.vala
+++ b/src/images/renderedText.vala
@@ -50,39 +50,60 @@ public class RenderedText : Image {
     
     public void render_text(string text, int width, int height, string font, 
                             Color color, double scale) {
-                            
+                  
         this.surface = new Cairo.ImageSurface(Cairo.Format.ARGB32, width, height);
 
-        var ctx = this.context();
-        
-        // set the color
-        ctx.set_source_rgb(color.r, color.g, color.g);
-        
-        var layout = Pango.cairo_create_layout(ctx);        
-        layout.set_width(Pango.units_from_double(width));
-        
-        var font_description = Pango.FontDescription.from_string(font);
-        font_description.set_size((int)(font_description.get_size() * scale));
-        
-        layout.set_font_description(font_description);
-        layout.set_text(text, -1);
-        
-        // add newlines at the end of each line, in order to allow ellipsizing
-        string broken_string = "";
-        foreach (var line in layout.get_lines()) {
-            broken_string = broken_string.concat(text.substring(line.start_index, line.length), "\n");
+        if (text != "") {
+
+            var ctx = this.context();
+            
+            // set the color
+            ctx.set_source_rgb(color.r, color.g, color.g);
+            
+            var layout = Pango.cairo_create_layout(ctx);        
+            layout.set_width(Pango.units_from_double(width));
+            
+            var font_description = Pango.FontDescription.from_string(font);
+            font_description.set_size((int)(font_description.get_size() * scale));
+            
+            layout.set_font_description(font_description);
+            layout.set_text(text, -1);
+            
+            // add newlines at the end of each line, in order to allow ellipsizing
+            string broken_string = "";
+            var lines = layout.get_lines().copy();
+            
+            foreach (var line in lines) {
+            
+                string next_line = text.substring(line.start_index, line.length);
+                
+                if (broken_string == "") {
+                    broken_string = next_line;
+                } else if (next_line != "") {
+                    // test whether the addition of a line would cause the height to become too large
+                    string broken_string_tmp = broken_string + "\n" + next_line;
+            
+                    layout.set_text(broken_string_tmp, -1);
+                    Pango.Rectangle extents;
+                    layout.get_pixel_extents(null, out extents);
+                    
+                    if (extents.height > height) broken_string = broken_string + next_line;
+                    else                         broken_string = broken_string_tmp;
+                }
+            }
+            
+            layout.set_text(broken_string, -1);
+            
+            layout.set_ellipsize(Pango.EllipsizeMode.END);
+            layout.set_alignment(Pango.Alignment.CENTER);
+            
+            Pango.Rectangle extents;
+            layout.get_pixel_extents(null, out extents);
+            ctx.move_to(0, (int)(0.5*(height - extents.height)));
+            
+            Pango.cairo_update_layout(ctx, layout);
+            Pango.cairo_show_layout(ctx, layout);
         }
-        layout.set_text(broken_string, broken_string.length-1);
-        
-        layout.set_ellipsize(Pango.EllipsizeMode.END);
-        layout.set_alignment(Pango.Alignment.CENTER);
-        
-        Pango.Rectangle extents;
-        layout.get_pixel_extents(null, out extents);
-        ctx.move_to(0, (int)(0.5*(height - extents.height)));
-        
-        Pango.cairo_update_layout(ctx, layout);
-        Pango.cairo_show_layout(ctx, layout);
     }
     
     /////////////////////////////////////////////////////////////////////
-- 
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