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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef UI_BASE_GLIB_GLIB_SIGNAL_H_
6 #define UI_BASE_GLIB_GLIB_SIGNAL_H_
10 // At the time of writing this, there were two common ways of binding our C++
11 // code to the gobject C system. We either defined a whole bunch of "static
12 // MethodThunk()" which just called nonstatic Method()s on a class (which hurt
13 // readability of the headers and signal connection code) OR we declared
14 // "static Method()" and passed in the current object as the gpointer (and hurt
15 // readability in the implementation by having "context->" before every
16 // variable).
18 // The hopeful result of using these macros is that the code will be more
19 // readable and regular. There shouldn't be a bunch of static Thunks visible in
20 // the headers and the implementations shouldn't be filled with "context->"
21 // de-references.
23 #define CHROMEG_CALLBACK_0(CLASS, RETURN, METHOD, SENDER) \
24 static RETURN METHOD ## Thunk(SENDER sender, gpointer userdata) { \
25 return reinterpret_cast<CLASS*>(userdata)->METHOD(sender); \
26 } \
27 \
28 RETURN METHOD(SENDER);
30 #define CHROMEG_CALLBACK_1(CLASS, RETURN, METHOD, SENDER, ARG1) \
31 static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, \
32 gpointer userdata) { \
33 return reinterpret_cast<CLASS*>(userdata)->METHOD(sender, one); \
34 } \
35 \
36 RETURN METHOD(SENDER, ARG1);
38 #define CHROMEG_CALLBACK_2(CLASS, RETURN, METHOD, SENDER, ARG1, ARG2) \
39 static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, ARG2 two, \
40 gpointer userdata) { \
41 return reinterpret_cast<CLASS*>(userdata)->METHOD(sender, one, two); \
42 } \
43 \
44 RETURN METHOD(SENDER, ARG1, ARG2);
46 #define CHROMEG_CALLBACK_3(CLASS, RETURN, METHOD, SENDER, ARG1, ARG2, ARG3) \
47 static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, ARG2 two, \
48 ARG3 three, gpointer userdata) { \
49 return reinterpret_cast<CLASS*>(userdata)-> \
50 METHOD(sender, one, two, three); \
51 } \
52 \
53 RETURN METHOD(SENDER, ARG1, ARG2, ARG3);
55 #define CHROMEG_CALLBACK_4(CLASS, RETURN, METHOD, SENDER, ARG1, ARG2, ARG3, \
56 ARG4) \
57 static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, ARG2 two, \
58 ARG3 three, ARG4 four, \
59 gpointer userdata) { \
60 return reinterpret_cast<CLASS*>(userdata)-> \
61 METHOD(sender, one, two, three, four); \
62 } \
63 \
64 RETURN METHOD(SENDER, ARG1, ARG2, ARG3, ARG4);
66 #define CHROMEG_CALLBACK_5(CLASS, RETURN, METHOD, SENDER, ARG1, ARG2, ARG3, \
67 ARG4, ARG5) \
68 static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, ARG2 two, \
69 ARG3 three, ARG4 four, ARG5 five, \
70 gpointer userdata) { \
71 return reinterpret_cast<CLASS*>(userdata)-> \
72 METHOD(sender, one, two, three, four, five); \
73 } \
74 \
75 RETURN METHOD(SENDER, ARG1, ARG2, ARG3, ARG4, ARG5);
77 #define CHROMEG_CALLBACK_6(CLASS, RETURN, METHOD, SENDER, ARG1, ARG2, ARG3, \
78 ARG4, ARG5, ARG6) \
79 static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, ARG2 two, \
80 ARG3 three, ARG4 four, ARG5 five, \
81 ARG6 six, gpointer userdata) { \
82 return reinterpret_cast<CLASS*>(userdata)-> \
83 METHOD(sender, one, two, three, four, five, six); \
84 } \
85 \
86 RETURN METHOD(SENDER, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6);
88 #define CHROMEG_VIRTUAL_CALLBACK_0(CLASS, RETURN, METHOD, SENDER) \
89 static RETURN METHOD ## Thunk(SENDER sender, gpointer userdata) { \
90 return reinterpret_cast<CLASS*>(userdata)->METHOD(sender); \
91 } \
92 \
93 virtual RETURN METHOD(SENDER);
95 #define CHROMEG_VIRTUAL_CALLBACK_1(CLASS, RETURN, METHOD, SENDER, ARG1) \
96 static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, \
97 gpointer userdata) { \
98 return reinterpret_cast<CLASS*>(userdata)->METHOD(sender, one); \
99 } \
100 \
101 virtual RETURN METHOD(SENDER, ARG1);
103 #define CHROMEG_VIRTUAL_CALLBACK_2(CLASS, RETURN, METHOD, SENDER, ARG1, ARG2) \
104 static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, ARG2 two, \
105 gpointer userdata) { \
106 return reinterpret_cast<CLASS*>(userdata)->METHOD(sender, one, two); \
107 } \
108 \
109 virtual RETURN METHOD(SENDER, ARG1, ARG2);
111 #define CHROMEG_VIRTUAL_CALLBACK_3(CLASS, RETURN, METHOD, SENDER, ARG1, ARG2, \
112 ARG3) \
113 static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, ARG2 two, \
114 ARG3 three, gpointer userdata) { \
115 return reinterpret_cast<CLASS*>(userdata)-> \
116 METHOD(sender, one, two, three); \
117 } \
118 \
119 virtual RETURN METHOD(SENDER, ARG1, ARG2, ARG3);
121 #define CHROMEG_VIRTUAL_CALLBACK_4(CLASS, RETURN, METHOD, SENDER, ARG1, ARG2, \
122 ARG3, ARG4) \
123 static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, ARG2 two, \
124 ARG3 three, ARG4 four, \
125 gpointer userdata) { \
126 return reinterpret_cast<CLASS*>(userdata)-> \
127 METHOD(sender, one, two, three, four); \
128 } \
129 \
130 virtual RETURN METHOD(SENDER, ARG1, ARG2, ARG3, ARG4);
132 #define CHROMEG_VIRTUAL_CALLBACK_5(CLASS, RETURN, METHOD, SENDER, ARG1, ARG2, \
133 ARG3, ARG4, ARG5) \
134 static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, ARG2 two, \
135 ARG3 three, ARG4 four, ARG5 five, \
136 gpointer userdata) { \
137 return reinterpret_cast<CLASS*>(userdata)-> \
138 METHOD(sender, one, two, three, four, five); \
139 } \
140 \
141 virtual RETURN METHOD(SENDER, ARG1, ARG2, ARG3, ARG4, ARG5);
143 #define CHROMEG_VIRTUAL_CALLBACK_6(CLASS, RETURN, METHOD, SENDER, ARG1, ARG2, \
144 ARG3, ARG4, ARG5, ARG6) \
145 static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, ARG2 two, \
146 ARG3 three, ARG4 four, ARG5 five, \
147 ARG6 six, gpointer userdata) { \
148 return reinterpret_cast<CLASS*>(userdata)-> \
149 METHOD(sender, one, two, three, four, five, six); \
150 } \
151 \
152 virtual RETURN METHOD(SENDER, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6);
154 #endif