4f4a8fc3c7
(to clarify static exception LGPL by changing license references) git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@8864 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
//
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// "$Id$"
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//
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// Character compose processing for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2010 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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// http://www.fltk.org/COPYING.php
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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#include <FL/Fl.H>
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#include <FL/x.H>
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#ifndef FL_DOXYGEN
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int Fl::compose_state = 0;
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#endif
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#if !defined(WIN32) && !defined(__APPLE__)
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extern XIC fl_xim_ic;
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#endif
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/** Any text editing widget should call this for each FL_KEYBOARD event.
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Use of this function is very simple.
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<p>If <i>true</i> is returned, then it has modified the
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Fl::event_text() and Fl::event_length() to a set of <i>bytes</i> to
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insert (it may be of zero length!). In will also set the "del"
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parameter to the number of <i>bytes</i> to the left of the cursor to
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delete, this is used to delete the results of the previous call to
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Fl::compose().
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<p>If <i>false</i> is returned, the keys should be treated as function
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keys, and del is set to zero. You could insert the text anyways, if
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you don't know what else to do.
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<p>Though the current implementation returns immediately, future
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versions may take quite awhile, as they may pop up a window or do
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other user-interface things to allow characters to be selected.
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*/
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int Fl::compose(int& del) {
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// character composition is now handled by the OS
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del = 0;
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#if defined(__APPLE__)
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// this stuff is to be treated as a function key
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if(Fl::e_length == 0 || Fl::e_keysym == FL_Enter || Fl::e_keysym == FL_KP_Enter ||
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Fl::e_keysym == FL_Tab || Fl::e_keysym == FL_Escape || Fl::e_state&(FL_META | FL_CTRL) ) {
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return 0;
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}
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#elif defined(WIN32)
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unsigned char ascii = (unsigned)e_text[0];
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if ((e_state & (FL_ALT | FL_META)) && !(ascii & 128)) return 0;
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#else
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unsigned char ascii = (unsigned)e_text[0];
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if ((e_state & (FL_ALT | FL_META | FL_CTRL)) && !(ascii & 128)) return 0;
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#endif
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if(Fl::compose_state) {
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del = Fl::compose_state;
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Fl::compose_state = 0;
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#ifndef __APPLE__
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} else {
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// Only insert non-control characters:
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if (! (ascii & ~31 && ascii!=127)) { return 0; }
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#endif
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}
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return 1;
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}
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/**
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If the user moves the cursor, be sure to call Fl::compose_reset().
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The next call to Fl::compose() will start out in an initial state. In
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particular it will not set "del" to non-zero. This call is very fast
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so it is ok to call it many times and in many places.
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*/
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void Fl::compose_reset()
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{
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Fl::compose_state = 0;
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#if !defined(WIN32) && !defined(__APPLE__)
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if (fl_xim_ic) XmbResetIC(fl_xim_ic);
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#endif
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}
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//
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// End of "$Id$"
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//
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