2 * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
3 * Copyright (C) $$Year-Rel$$ The Jalview Authors
5 * This file is part of Jalview.
7 * Jalview is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation, either version 3
10 * of the License, or (at your option) any later version.
12 * Jalview is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 * PURPOSE. See the GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Jalview. If not, see <http://www.gnu.org/licenses/>.
19 * The Jalview Authors are detailed in the 'AUTHORS' file.
23 import java.awt.Toolkit;
24 import java.awt.event.MouseEvent;
27 * System platform information used by Applet and Application
34 private static Boolean isAMac = null, isWindows = null;
36 private static Boolean isHeadless = null;
39 * sorry folks - Macs really are different
41 * BH: disabled for SwingJS -- will need to check key-press issues
43 * @return true if we do things in a special way.
45 public static boolean isAMac()
49 isAMac = /** @j2sNative false && */
50 System.getProperty("os.name").indexOf("Mac") > -1;
53 return isAMac.booleanValue();
58 * Check if we are on a Microsoft plaform...
60 * @return true if we have to cope with another platform variation
62 public static boolean isWindows()
64 if (isWindows == null)
66 isWindows = /** @j2sNative false && */
67 System.getProperty("os.name").indexOf("Win") > -1;
69 return isWindows.booleanValue();
74 * @return true if we are running in non-interactive no UI mode
76 public static boolean isHeadless()
78 if (isHeadless == null)
80 isHeadless = "true".equals(System.getProperty("java.awt.headless"));
87 * @return nominal maximum command line length for this platform
89 public static int getMaxCommandLineLength()
91 // TODO: determine nominal limits for most platforms.
92 return 2046; // this is the max length for a windows NT system.
96 * escape a string according to the local platform's escape character
99 * @return escaped file
101 public static String escapeString(String file)
103 StringBuffer f = new StringBuffer();
104 int p = 0, lastp = 0;
105 while ((p = file.indexOf('\\', lastp)) > -1)
107 f.append(file.subSequence(lastp, p));
111 f.append(file.substring(lastp));
116 * Answers true if the mouse event has Meta-down (Command key on Mac) or
117 * Ctrl-down (on other o/s). Note this answers _false_ if the Ctrl key is
118 * pressed instead of the Meta/Cmd key on Mac. To test for Ctrl-click on Mac,
119 * you can use e.isPopupTrigger().
124 public static boolean isControlDown(MouseEvent e)
126 boolean aMac = isAMac();
127 return isControlDown(e, aMac);
131 * Overloaded version of method (to allow unit testing)
137 protected static boolean isControlDown(MouseEvent e, boolean aMac)
142 * answer false for right mouse button
144 if (e.isPopupTrigger())
148 return (Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()
149 & e.getModifiers()) != 0;
150 // could we use e.isMetaDown() here?
152 return e.isControlDown();