pango.fontset source code

1 /*
2  * Distributed under the Boost Software License, Version 1.0.
3  *    (See accompanying file LICENSE_1_0.txt or copy at
4  *          http://www.boost.org/LICENSE_1_0.txt)
5  */
6 module pango.fontset;
7 
8 import pango.utils;
9 import pango.font;
10 import pango.c.font;
11 import pango.c.fontset;
12 
13 import gobject;
14 import glib;
15 
16 
17 /**
18 * PangoFontset:
19 *
20 * A #PangoFontset represents a set of #PangoFont to use
21 * when rendering text. It is the result of resolving a
22 * #PangoFontDescription against a particular #PangoContext.
23 * It has operations for finding the component font for
24 * a particular Unicode character, and for finding a composite
25 * set of metrics for the entire fontset.
26 */
27  class FontSet : D_GObject
28 {
29     mixin GObjectHolder!PangoFontset;
30     mixin FontFactoryHolder;
31 
32     package this(PangoFontset *ptr, Transfer transfer)
33     {
34         super(cast(GObject*)ptr, transfer);
35         fontFactory = defaultFontFactory;
36     }
37 
38     Font font(uint wc) {
39         return fontFactory.getFont(pango_fontset_get_font(nativePtr, wc), Transfer.Full);
40     }
41 
42     @property FontMetrics metrics() {
43         return getDObject!FontMetrics(pango_fontset_get_metrics(nativePtr), Transfer.Full);
44     }
45 
46 
47     int opApply(int delegate(ref Font font) dg)
48     {
49         auto fd = ForeachData(dg, fontFactory);
50         pango_fontset_foreach(nativePtr, &foreachApplyCb, &fd);
51         return fd.res;
52     }
53 
54 }
55 
56 
57 private
58 {
59     alias ForeachDelegate = int delegate(ref Font font);
60 
61     struct ForeachData
62     {
63         int res = 0;
64         ForeachDelegate dg;
65         FontFactory fontFactory;
66 
67         @disable this();
68 
69         this (ForeachDelegate dg, FontFactory fontFactory) {
70             this.dg = dg;
71             this.fontFactory = fontFactory;
72         }
73     }
74 
75     extern (C)
76     private gboolean foreachApplyCb(PangoFontset* fontset, PangoFont *font, gpointer userData)
77     {
78         ForeachData *fd = cast(ForeachData*)userData;
79         auto dg = fd.dg;
80         auto f = fd.fontFactory.getFont(font, Transfer.None);
81         fd.res = dg(f);
82         if (fd.res) return TRUE;
83         else return FALSE;
84     }
85 
86 }