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Diffstat (limited to 'app/gtk_signal.h')
| -rw-r--r-- | app/gtk_signal.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/app/gtk_signal.h b/app/gtk_signal.h new file mode 100644 index 0000000..e56c75d --- /dev/null +++ b/app/gtk_signal.h @@ -0,0 +1,91 @@ +// 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_ + +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 CHROMEGTK_CALLBACK_0(TYPE, RETURN, METHOD) \ + static RETURN METHOD ## Thunk(GtkWidget* widget, gpointer userdata) { \ + return reinterpret_cast<TYPE*>(userdata)->METHOD(widget); \ + } \ + \ + RETURN METHOD(GtkWidget* widget); + +#define CHROMEGTK_CALLBACK_1(TYPE, RETURN, METHOD, ARG1) \ + static RETURN METHOD ## Thunk(GtkWidget* widget, ARG1 one, \ + gpointer userdata) { \ + return reinterpret_cast<TYPE*>(userdata)->METHOD(widget, one); \ + } \ + \ + RETURN METHOD(GtkWidget* widget, ARG1 one); + +#define CHROMEGTK_CALLBACK_2(TYPE, RETURN, METHOD, ARG1, ARG2) \ + static RETURN METHOD ## Thunk(GtkWidget* widget, ARG1 one, ARG2 two, \ + gpointer userdata) { \ + return reinterpret_cast<TYPE*>(userdata)->METHOD(widget, one, two); \ + } \ + \ + RETURN METHOD(GtkWidget* widget, ARG1 one, ARG2 two); + +#define CHROMEGTK_CALLBACK_3(TYPE, RETURN, METHOD, ARG1, ARG2, ARG3) \ + static RETURN METHOD ## Thunk(GtkWidget* widget, ARG1 one, ARG2 two, \ + ARG3 three, gpointer userdata) { \ + return reinterpret_cast<TYPE*>(userdata)-> \ + METHOD(widget, one, two, three); \ + } \ + \ + RETURN METHOD(GtkWidget* widget, ARG1 one, ARG2 two, ARG3 three); + +#define CHROMEGTK_CALLBACK_4(TYPE, RETURN, METHOD, ARG1, ARG2, ARG3, ARG4) \ + static RETURN METHOD ## Thunk(GtkWidget* widget, ARG1 one, ARG2 two, \ + ARG3 three, ARG4 four, \ + gpointer userdata) { \ + return reinterpret_cast<TYPE*>(userdata)-> \ + METHOD(widget, one, two, three, four); \ + } \ + \ + RETURN METHOD(GtkWidget* widget, ARG1 one, ARG2 two, ARG3 three, \ + ARG4 four); + +#define CHROMEGTK_CALLBACK_5(TYPE, RETURN, METHOD, ARG1, ARG2, ARG3, ARG4, \ + ARG5) \ + static RETURN METHOD ## Thunk(GtkWidget* widget, ARG1 one, ARG2 two, \ + ARG3 three, ARG4 four, ARG5 five, \ + gpointer userdata) { \ + return reinterpret_cast<TYPE*>(userdata)-> \ + METHOD(widget, one, two, three, four, five); \ + } \ + \ + RETURN METHOD(GtkWidget* widget, ARG1 one, ARG2 two, ARG3 three, \ + ARG4 four, ARG5 five); + +#define CHROMEGTK_CALLBACK_6(TYPE, RETURN, METHOD, ARG1, ARG2, ARG3, ARG4, \ + ARG5, ARG6) \ + static RETURN METHOD ## Thunk(GtkWidget* widget, ARG1 one, ARG2 two, \ + ARG3 three, ARG4 four, ARG5 five, \ + ARG6 six, gpointer userdata) { \ + return reinterpret_cast<TYPE*>(userdata)-> \ + METHOD(widget, one, two, three, four, five, six); \ + } \ + \ + RETURN METHOD(GtkWidget* widget, ARG1 one, ARG2 two, ARG3 three, \ + ARG4 four, ARG5 five, ARG6 six); + +#endif // APP_GTK_SIGNAL_H_ |