1 /* Copyright 2009 Pierre Ossman for Cendio AB
2  *
3  * This is free software; you can redistribute it and/or modify
4  * it under the terms of the GNU General Public License as published by
5  * the Free Software Foundation; either version 2 of the License, or
6  * (at your option) any later version.
7  *
8  * This software is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this software; if not, write to the Free Software
15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
16  * USA.
17  */
18 
19 // Management class for the RFB virtual screens
20 
21 package com.tigervnc.rfb;
22 
23 import java.util.*;
24 
25 public class ScreenSet {
26 
27   // Represents a complete screen configuration, excluding framebuffer
28   // dimensions.
29 
ScreenSet()30   public ScreenSet() {
31     screens = new ArrayList<Screen>();
32   }
33 
begin()34   public final ListIterator<Screen> begin() { return screens.listIterator(0); }
end()35   public final ListIterator<Screen> end() {
36     return screens.listIterator(screens.size());
37   }
num_screens()38   public final int num_screens() { return screens.size(); }
39 
add_screen(Screen screen)40   public final void add_screen(Screen screen) { screens.add(screen); }
remove_screen(int id)41   public final void remove_screen(int id) {
42     ListIterator iter, nextiter;
43     for (iter = begin(); iter != end(); iter = nextiter) {
44       nextiter = iter; nextiter.next();
45       if (((Screen)iter.next()).id == id)
46         iter.remove();
47     }
48   }
49 
validate(int fb_width, int fb_height)50   public final boolean validate(int fb_width, int fb_height) {
51       List<Integer> seen_ids = new ArrayList<Integer>();
52       Rect fb_rect = new Rect();
53 
54       if (screens.isEmpty())
55         return false;
56       if (num_screens() > 255)
57         return false;
58 
59       fb_rect.setXYWH(0, 0, fb_width, fb_height);
60 
61       for (Iterator<Screen> iter = screens.iterator(); iter.hasNext(); ) {
62         Screen refScreen = (Screen)iter.next();
63         if (refScreen.dimensions.is_empty())
64           return false;
65         if (!refScreen.dimensions.enclosed_by(fb_rect))
66           return false;
67         if (seen_ids.lastIndexOf(refScreen.id) != -1)
68           return false;
69         seen_ids.add(refScreen.id);
70       }
71 
72       return true;
73   }
74 
debug_print()75   public final void debug_print() {
76     vlog.debug(num_screens()+" screen(s)");
77     for (Iterator<Screen> iter = screens.iterator(); iter.hasNext(); ) {
78       Screen refScreen = (Screen)iter.next();
79       vlog.debug("    "+refScreen.id+" (0x"+refScreen.id+"): "+
80                 refScreen.dimensions.width()+"x"+refScreen.dimensions.height()+
81                 "+"+refScreen.dimensions.tl.x+"+"+refScreen.dimensions.tl.y+
82                 " (flags 0x"+refScreen.flags+")");
83     }
84   }
85 
86   public ArrayList<Screen> screens;
87 
88   static LogWriter vlog = new LogWriter("ScreenSet");
89 
90 }
91 
92