fl_text_editor.cxx

SRI international 发布的OAA框架软件

//
// "$Id: Fl_Text_Editor.cxx,v 1.1.1.1 2003/06/03 22:25:44 agno Exp $"
//
// Copyright 2001-2003 by Bill Spitzak and others.
// Original code Copyright Mark Edel.  Permission to distribute under
// the LGPL for the FLTK library granted by Mark Edel.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "[e-mail]".
//

#include <stdio.h>
#include <stdlib.h>
#include "flstring.h"
#include <ctype.h>
#include <FL/Fl.H>
#include <FL/Fl_Text_Editor.H>
#include <FL/fl_ask.H>


Fl_Text_Editor::Fl_Text_Editor(int X, int Y, int W, int H,  const char* l)
    : Fl_Text_Display(X, Y, W, H, l) {
  mCursorOn = 1;
  insert_mode_ = 1;
  key_bindings = 0;

  // handle the default key bindings
  add_default_key_bindings(&key_bindings);

  // handle everything else
  default_key_function(kf_default);
}

Fl_Text_Editor::Key_Binding* Fl_Text_Editor::global_key_bindings = 0;

static int ctrl_a(int, Fl_Text_Editor* e);

// These are the default key bindings every widget should start with
static struct {
  int key;
  int state;
  Fl_Text_Editor::Key_Func func;
} default_key_bindings[] = {
  { FL_Escape,    FL_TEXT_EDITOR_ANY_STATE, Fl_Text_Editor::kf_ignore     },
  { FL_Enter,     FL_TEXT_EDITOR_ANY_STATE, Fl_Text_Editor::kf_enter      },
  { FL_KP_Enter,  FL_TEXT_EDITOR_ANY_STATE, Fl_Text_Editor::kf_enter      },
  { FL_BackSpace, FL_TEXT_EDITOR_ANY_STATE, Fl_Text_Editor::kf_backspace  },
  { FL_Insert,    FL_TEXT_EDITOR_ANY_STATE, Fl_Text_Editor::kf_insert     },
  { FL_Delete,    FL_TEXT_EDITOR_ANY_STATE, Fl_Text_Editor::kf_delete     },
  { FL_Home,      0,                        Fl_Text_Editor::kf_move       },
  { FL_End,       0,                        Fl_Text_Editor::kf_move       },
  { FL_Left,      0,                        Fl_Text_Editor::kf_move       },
  { FL_Up,        0,                        Fl_Text_Editor::kf_move       },
  { FL_Right,     0,                        Fl_Text_Editor::kf_move       },
  { FL_Down,      0,                        Fl_Text_Editor::kf_move       },
  { FL_Page_Up,   0,                        Fl_Text_Editor::kf_move       },
  { FL_Page_Down, 0,                        Fl_Text_Editor::kf_move       },
  { FL_Home,      FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
  { FL_End,       FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
  { FL_Left,      FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
  { FL_Up,        FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
  { FL_Right,     FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
  { FL_Down,      FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
  { FL_Page_Up,   FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
  { FL_Page_Down, FL_SHIFT,                 Fl_Text_Editor::kf_shift_move },
  { FL_Home,      FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
  { FL_End,       FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
  { FL_Left,      FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
  { FL_Up,        FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
  { FL_Right,     FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
  { FL_Down,      FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
  { FL_Page_Up,   FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
  { FL_Page_Down, FL_CTRL,                  Fl_Text_Editor::kf_ctrl_move  },
  { FL_Home,      FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
  { FL_End,       FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
  { FL_Left,      FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
  { FL_Up,        FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
  { FL_Right,     FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
  { FL_Down,      FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
  { FL_Page_Up,   FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
  { FL_Page_Down, FL_CTRL|FL_SHIFT,         Fl_Text_Editor::kf_c_s_move   },
//{ FL_Clear,	  0,                        Fl_Text_Editor::delete_to_eol },
  { 'z',          FL_CTRL,                  Fl_Text_Editor::kf_undo	  },
  { '/',          FL_CTRL,                  Fl_Text_Editor::kf_undo	  },
  { 'x',          FL_CTRL,                  Fl_Text_Editor::kf_cut        },
  { FL_Delete,    FL_SHIFT,                 Fl_Text_Editor::kf_cut        },
  { 'c',          FL_CTRL,                  Fl_Text_Editor::kf_copy       },
  { FL_Insert,    FL_CTRL,                  Fl_Text_Editor::kf_copy       },
  { 'v',          FL_CTRL,                  Fl_Text_Editor::kf_paste      },
  { FL_Insert,    FL_SHIFT,                 Fl_Text_Editor::kf_paste      },
  { 'a',          FL_CTRL,                  ctrl_a                        },

#ifdef __APPLE__
  // Define CMD+key accelerators...
  { 'z',          FL_COMMAND,               Fl_Text_Editor::kf_undo       },
  { 'x',          FL_COMMAND,               Fl_Text_Editor::kf_cut        },
  { 'c',          FL_COMMAND,               Fl_Text_Editor::kf_copy       },
  { 'v',          FL_COMMAND,               Fl_Text_Editor::kf_paste      },
  { 'a',          FL_COMMAND,               ctrl_a                        },
#endif // __APPLE__

  { 0,            0,                        0                             }
};

void Fl_Text_Editor::add_default_key_bindings(Key_Binding** list) {
  for (int i = 0; default_key_bindings[i].key; i++) {
    add_key_binding(default_key_bindings[i].key,
                    default_key_bindings[i].state,
                    default_key_bindings[i].func,
                    list);
  }
}

Fl_Text_Editor::Key_Func
Fl_Text_Editor::bound_key_function(int key, int state, Key_Binding* list) {
  Key_Binding* cur;
  for (cur = list; cur; cur = cur->next)
    if (cur->key == key)
      if (cur->state == FL_TEXT_EDITOR_ANY_STATE || cur->state == state)
        break;
  if (!cur) return 0;
  return cur->function;
}

void
Fl_Text_Editor::remove_all_key_bindings(Key_Binding** list) {
  Key_Binding *cur, *next;
  for (cur = *list; cur; cur = next) {
    next = cur->next;
    delete cur;
  }
  *list = 0;
}

void
Fl_Text_Editor::remove_key_binding(int key, int state, Key_Binding** list) {
  Key_Binding *cur, *last = 0;
  for (cur = *list; cur; last = cur, cur = cur->next)
    if (cur->key == key && cur->state == state) break;
  if (!cur) return;
  if (last) last->next = cur->next;
  else *list = cur->next;
  delete cur;
}

void
Fl_Text_Editor::add_key_binding(int key, int state, Key_Func function,
                                Key_Binding** list) {
  Key_Binding* kb = new Key_Binding;
  kb->key = key;
  kb->state = state;
  kb->function = function;
  kb->next = *list;
  *list = kb;
}

////////////////////////////////////////////////////////////////

#define NORMAL_INPUT_MOVE 0

static void kill_selection(Fl_Text_Editor* e) {
  if (e->buffer()->selected()) {
    e->insert_position(e->buffer()->primary_selection()->start());
    e->buffer()->remove_selection();
  }
}

int Fl_Text_Editor::kf_default(int c, Fl_Text_Editor* e) {
  if (!c || (!isprint(c) && c != '\t')) return 0;
  char s[2] = "\0";
  s[0] = (char)c;
  kill_selection(e);
  if (e->insert_mode()) e->insert(s);
  else e->overstrike(s);
  e->show_insert_position();
  if (e->when()&FL_WHEN_CHANGED) e->do_callback(); else e->set_changed();
  return 1;
}

int Fl_Text_Editor::kf_ignore(int, Fl_Text_Editor*) {
  return 0; // don't handle
}

int Fl_Text_Editor::kf_backspace(int, Fl_Text_Editor* e) {
  if (!e->buffer()->selected() && e->move_left())
    e->buffer()->select(e->insert_position(), e->insert_position()+1);
  kill_selection(e);
  e->show_insert_position();
  if (e->when()&FL_WHEN_CHANGED) e->do_callback(); else e->set_changed();
  return 1;
}

int Fl_Text_Editor::kf_enter(int, Fl_Text_Editor* e) {
  kill_selection(e);
  e->insert("\n");
  e->show_insert_position();
  if (e->when()&FL_WHEN_CHANGED) e->do_callback(); else e->set_changed();
  return 1;
}

extern void fl_text_drag_me(int pos, Fl_Text_Display* d);

int Fl_Text_Editor::kf_move(int c, Fl_Text_Editor* e) {
  int i;
  int selected = e->buffer()->selected();
  if (!selected)
    e->dragPos = e->insert_position();
  e->buffer()->unselect();
  switch (c) {
  case FL_Home:
      e->insert_position(e->buffer()->line_start(e->insert_position()));
      break;
    case FL_End:
      e->insert_position(e->buffer()->line_end(e->insert_position()));
      break;
    case FL_Left:
      e->move_left();
      break;
    case FL_Right:
      e->move_right();
      break;
    case FL_Up:
      e->move_up();
      break;
    case FL_Down:
      e->move_down();
      break;
    case FL_Page_Up:
      for (i = 0; i < e->mNVisibleLines - 1; i++) e->move_up();
      break;