b426a3d7c0
Both bugs can happen if a widget doesn't have an associated window() or in similar situations. These fixes returns NULL to prevent crashes. Bugs observed in special test scenarios, not real-life programs.
81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
//
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// Platform header file for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2022 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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// These are FLTK symbols that are necessary or useful for calling
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// platform specific functions. This file #include's certain platform
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// specific system header files that are necessary to declare platform
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// specific FLTK functions, for instance "Windows.h" under Windows.
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// You should include this file if (and ONLY if) you need to call
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// platform specific functions directly.
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// See FLTK documentation: chapter "Operating System Issues" on when
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// you need to #include <FL/platform.H>
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#if !defined(FL_PLATFORM_H) && !defined(FL_DOXYGEN)
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# define FL_PLATFORM_H
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# include <FL/Fl_Export.H>
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# include <FL/platform_types.h> // will bring in FL/fl_config.h
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# include <FL/fl_types.h> // for uchar
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class Fl_Window;
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# ifdef _WIN32
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# include "win32.H"
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# elif defined(__APPLE__)
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# include "mac.H"
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# elif defined(FLTK_USE_WAYLAND)
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# include "wayland.H"
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# elif defined(FLTK_USE_X11)
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# include "x11.H"
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# endif // _WIN32
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//
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// cross-platform declarations
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//
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#if defined(FL_LIBRARY) || defined(FL_INTERNALS)
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# include <FL/Fl_Window.H>
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class FL_EXPORT Fl_X {
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public:
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fl_uintptr_t xid;
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Fl_Window* w;
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Fl_Region region;
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Fl_X *next;
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// static variables, static functions and member functions
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static Fl_X* first;
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static Fl_X* i(const Fl_Window* w) {return w ? (Fl_X*)w->i : 0;}
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# if defined(FLTK_USE_X11) && FLTK_USE_X11 // for backward compatibility
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static void make_xid(Fl_Window*, XVisualInfo* =fl_visual, Colormap=fl_colormap);
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static Fl_X* set_xid(Fl_Window*, Window);
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# endif
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};
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inline Window fl_xid(const Fl_Window* w) { Fl_X *xTemp = Fl_X::i(w); return xTemp ? (Window)xTemp->xid : 0; }
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#else
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extern FL_EXPORT Window fl_xid_(const Fl_Window* w);
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# define fl_xid(w) fl_xid_(w)
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#endif // FL_LIBRARY || FL_INTERNALS
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extern FL_EXPORT Fl_Window* fl_find(Window xid);
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extern FL_EXPORT void fl_open_display();
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extern FL_EXPORT void fl_close_display();
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extern FL_EXPORT Window fl_window;
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extern FL_EXPORT int fl_parse_color(const char* p, uchar& r, uchar& g, uchar& b);
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extern FL_EXPORT void fl_open_callback(void (*)(const char *));
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#endif // !FL_PLATFORM_H
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