| // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef APP_GTK_SIGNAL_H_ |
| #define APP_GTK_SIGNAL_H_ |
| #pragma once |
| |
| typedef void* gpointer; |
| typedef struct _GtkWidget GtkWidget; |
| |
| // At the time of writing this, there were two common ways of binding our C++ |
| // code to the gobject C system. We either defined a whole bunch of "static |
| // MethodThunk()" which just called nonstatic Method()s on a class (which hurt |
| // readability of the headers and signal connection code) OR we declared |
| // "static Method()" and passed in the current object as the gpointer (and hurt |
| // readability in the implementation by having "context->" before every |
| // variable). |
| |
| // The hopeful result of using these macros is that the code will be more |
| // readable and regular. There shouldn't be a bunch of static Thunks visible in |
| // the headers and the implementations shouldn't be filled with "context->" |
| // de-references. |
| |
| #define CHROMEG_CALLBACK_0(CLASS, RETURN, METHOD, SENDER) \ |
| static RETURN METHOD ## Thunk(SENDER sender, gpointer userdata) { \ |
| return reinterpret_cast<CLASS*>(userdata)->METHOD(sender); \ |
| } \ |
| \ |
| virtual RETURN METHOD(SENDER); |
| |
| #define CHROMEG_CALLBACK_1(CLASS, RETURN, METHOD, SENDER, ARG1) \ |
| static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, \ |
| gpointer userdata) { \ |
| return reinterpret_cast<CLASS*>(userdata)->METHOD(sender, one); \ |
| } \ |
| \ |
| virtual RETURN METHOD(SENDER, ARG1); |
| |
| #define CHROMEG_CALLBACK_2(CLASS, RETURN, METHOD, SENDER, ARG1, ARG2) \ |
| static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, ARG2 two, \ |
| gpointer userdata) { \ |
| return reinterpret_cast<CLASS*>(userdata)->METHOD(sender, one, two); \ |
| } \ |
| \ |
| virtual RETURN METHOD(SENDER, ARG1, ARG2); |
| |
| #define CHROMEG_CALLBACK_3(CLASS, RETURN, METHOD, SENDER, ARG1, ARG2, ARG3) \ |
| static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, ARG2 two, \ |
| ARG3 three, gpointer userdata) { \ |
| return reinterpret_cast<CLASS*>(userdata)-> \ |
| METHOD(sender, one, two, three); \ |
| } \ |
| \ |
| virtual RETURN METHOD(SENDER, ARG1, ARG2, ARG3); |
| |
| #define CHROMEG_CALLBACK_4(CLASS, RETURN, METHOD, SENDER, ARG1, ARG2, ARG3, \ |
| ARG4) \ |
| static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, ARG2 two, \ |
| ARG3 three, ARG4 four, \ |
| gpointer userdata) { \ |
| return reinterpret_cast<CLASS*>(userdata)-> \ |
| METHOD(sender, one, two, three, four); \ |
| } \ |
| \ |
| virtual RETURN METHOD(SENDER, ARG1, ARG2, ARG3, ARG4); |
| |
| #define CHROMEG_CALLBACK_5(CLASS, RETURN, METHOD, SENDER, ARG1, ARG2, ARG3, \ |
| ARG4, ARG5) \ |
| static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, ARG2 two, \ |
| ARG3 three, ARG4 four, ARG5 five, \ |
| gpointer userdata) { \ |
| return reinterpret_cast<CLASS*>(userdata)-> \ |
| METHOD(sender, one, two, three, four, five); \ |
| } \ |
| \ |
| virtual RETURN METHOD(SENDER, ARG1, ARG2, ARG3, ARG4, ARG5); |
| |
| #define CHROMEG_CALLBACK_6(CLASS, RETURN, METHOD, SENDER, ARG1, ARG2, ARG3, \ |
| ARG4, ARG5, ARG6) \ |
| static RETURN METHOD ## Thunk(SENDER sender, ARG1 one, ARG2 two, \ |
| ARG3 three, ARG4 four, ARG5 five, \ |
| ARG6 six, gpointer userdata) { \ |
| return reinterpret_cast<CLASS*>(userdata)-> \ |
| METHOD(sender, one, two, three, four, five, six); \ |
| } \ |
| \ |
| virtual RETURN METHOD(SENDER, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6); |
| |
| // These macros handle the common case where the sender object will be a |
| // GtkWidget*. |
| #define CHROMEGTK_CALLBACK_0(CLASS, RETURN, METHOD) \ |
| CHROMEG_CALLBACK_0(CLASS, RETURN, METHOD, GtkWidget*); |
| |
| #define CHROMEGTK_CALLBACK_1(CLASS, RETURN, METHOD, ARG1) \ |
| CHROMEG_CALLBACK_1(CLASS, RETURN, METHOD, GtkWidget*, ARG1); |
| |
| #define CHROMEGTK_CALLBACK_2(CLASS, RETURN, METHOD, ARG1, ARG2) \ |
| CHROMEG_CALLBACK_2(CLASS, RETURN, METHOD, GtkWidget*, ARG1, ARG2); |
| |
| #define CHROMEGTK_CALLBACK_3(CLASS, RETURN, METHOD, ARG1, ARG2, ARG3) \ |
| CHROMEG_CALLBACK_3(CLASS, RETURN, METHOD, GtkWidget*, ARG1, ARG2, ARG3); |
| |
| #define CHROMEGTK_CALLBACK_4(CLASS, RETURN, METHOD, ARG1, ARG2, ARG3, ARG4) \ |
| CHROMEG_CALLBACK_4(CLASS, RETURN, METHOD, GtkWidget*, ARG1, ARG2, ARG3, ARG4); |
| |
| #define CHROMEGTK_CALLBACK_5(CLASS, RETURN, METHOD, ARG1, ARG2, ARG3, ARG4, \ |
| ARG5) \ |
| CHROMEG_CALLBACK_5(CLASS, RETURN, METHOD, GtkWidget*, ARG1, ARG2, ARG3, \ |
| ARG4, ARG5); |
| |
| #define CHROMEGTK_CALLBACK_6(CLASS, RETURN, METHOD, ARG1, ARG2, ARG3, ARG4, \ |
| ARG5, ARG6) \ |
| CHROMEG_CALLBACK_6(CLASS, RETURN, METHOD, GtkWidget*, ARG1, ARG2, ARG3, \ |
| ARG4, ARG5, ARG6); |
| |
| #endif // APP_GTK_SIGNAL_H_ |