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
33 private static Boolean isAMac = null;
35 private static Boolean isHeadless = null;
38 * sorry folks - Macs really are different
40 * @return true if we do things in a special way.
42 public static boolean isAMac()
46 isAMac = System.getProperty("os.name").indexOf("Mac") > -1;
48 return isAMac.booleanValue();
54 * @return true if we are running in non-interactive no UI mode
56 public static boolean isHeadless()
58 if (isHeadless == null)
60 isHeadless = "true".equals(System.getProperty("java.awt.headless"));
67 * @return nominal maximum command line length for this platform
69 public static int getMaxCommandLineLength()
71 // TODO: determine nominal limits for most platforms.
72 return 2046; // this is the max length for a windows NT system.
76 * escape a string according to the local platform's escape character
79 * @return escaped file
81 public static String escapeString(String file)
83 StringBuffer f = new StringBuffer();
85 while ((p = file.indexOf('\\', lastp)) > -1)
87 f.append(file.subSequence(lastp, p));
91 f.append(file.substring(lastp));
96 * Answers true if the mouse event has Meta-down (Command key on Mac) or
97 * Ctrl-down (on other o/s). Note this answers _false_ if the Ctrl key is
98 * pressed instead of the Meta/Cmd key on Mac. To test for Ctrl-click on Mac,
99 * you can use e.isPopupTrigger().
104 public static boolean isControlDown(MouseEvent e)
106 boolean aMac = isAMac();
107 return isControlDown(e, aMac);
111 * Overloaded version of method (to allow unit testing)
117 protected static boolean isControlDown(MouseEvent e, boolean aMac)
122 * answer false for right mouse button
124 if (e.isPopupTrigger())
128 return (Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()
129 & e.getModifiers()) != 0;
130 // could we use e.isMetaDown() here?
132 return e.isControlDown();