increase standard font face priorities when searching for fonts

src/dlangui/graphics/ftfonts.d

@@ -22,6 +22,33 @@ import std.file;
 import std.string;
 import std.utf;
 
+immutable int[string] STD_FONT_FACES = [
+    "Arial": 12,
+    "Times New Roman": 12,
+    "Courier New": 10,
+    "DejaVu Serif": 10,
+    "DejaVu Sans": 10,
+    "DejaVu Sans Mono": 10,
+    "Liberation Serif": 11,
+    "Liberation Sans": 11,
+    "Liberation Mono": 11,
+    "Verdana": 10,
+    "Menlo": 13,
+    "Consolas": 12,
+    "DejaVuSansMono": 10,
+    "Lucida Sans Typewriter": 10,
+    "Lucida Console": 12,
+    "FreeMono": 8,
+    "FreeSans": 8,
+    "FreeSerif": 8,
+];
+
+int stdFontFacePriority(string face) {
+    if (auto p = (face in STD_FONT_FACES))
+        return *p;
+    return 0;
+}
+
 /// define debug=FontResources for logging of font file resources creation/freeing
 //debug = FontResources;
 
@@ -505,7 +532,7 @@ class FreeTypeFontManager : FontManager {
                 return 200;
             }
         }
-        return 0;
+        return stdFontFacePriority(existing) * 10;
     }
 
     private FontFileItem findBestMatch(int weight, bool italic, FontFamily family, string face) {

src/dlangui/widgets/srcedit.d

@@ -25,7 +25,7 @@ import dlangui.widgets.styles;
 class SourceEdit : EditBox {
     this(string ID) {
         super(ID);
-        fontFace = "Menlo,Consolas,DejaVuSansMono,Lucida Sans Typewriter,Courier New,Lucida Console";
+        fontFace = "Menlo,Consolas,DejaVuSansMono,DejaVu Sans Mono,Liberation Mono,Lucida Sans Typewriter,Courier New,Lucida Console";
         //fontFace = "Consolas,Lucida Console,Courier New";
         fontFamily = FontFamily.MonoSpace;
         fontSize = makePointSize(10);

views/res/theme_default.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <theme id="theme_default" 
         fontSize="9pt" 
-        fontFace="Verdana,Arial,DejaVu Sans"
+        fontFace="Verdana,Arial,DejaVu Sans,Liberation Sans"
         fontFamily="SansSerif"
 	>
     <color id="window_background" value="#FFFFFF"/>
@@ -422,7 +422,8 @@
         layoutWidth="FILL_PARENT"
         layoutHeight="WRAP_CONTENT"
         align="Left|VCenter"
-        textFlags="Parent">
+        textFlags="Parent"
+        >
         <state state_default="true" fontWeight="bold"/>
     </style>