/jEdit/branches/4.3.x-fix-view-leak/org/gjt/sp/jedit/gui/DefaultInputHandler.java
Java | 245 lines | 143 code | 13 blank | 89 comment | 33 complexity | 0b89653e006439539f2c8147b03b2e36 MD5 | raw file
✨ Summary
- /*
- * DefaultInputHandler.java - Default implementation of an input handler
- * :tabSize=8:indentSize=8:noTabs=false:
- * :folding=explicit:collapseFolds=1:
- *
- * Copyright (C) 1999, 2003 Slava Pestov
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- package org.gjt.sp.jedit.gui;
- //{{{ Imports
- import java.awt.event.InputEvent;
- import java.awt.Toolkit;
- import java.util.Hashtable;
- import org.gjt.sp.jedit.*;
- //}}}
- /**
- * The default input handler. It maps sequences of keystrokes into actions
- * and inserts key typed events into the text area.
- * @author Slava Pestov
- * @version $Id: DefaultInputHandler.java 12504 2008-04-22 23:12:43Z ezust $
- */
- public class DefaultInputHandler extends InputHandler
- {
- //{{{ DefaultInputHandler constructor
- /**
- * Creates a new input handler with no key bindings defined.
- * @param view The view
- * @param bindings An explicitly-specified set of key bindings,
- * must not be null.
- * @since jEdit 4.3pre1
- */
- public DefaultInputHandler(View view, Hashtable bindings)
- {
- super(view);
- if(bindings == null)
- throw new NullPointerException();
- this.bindings = this.currentBindings = bindings;
- } //}}}
- //{{{ DefaultInputHandler constructor
- /**
- * Creates a new input handler with no key bindings defined.
- * @param view The view
- */
- public DefaultInputHandler(View view)
- {
- this(view,new Hashtable());
- } //}}}
- //{{{ DefaultInputHandler constructor
- /**
- * Creates a new input handler with the same set of key bindings
- * as the one specified. Note that both input handlers share
- * a pointer to exactly the same key binding table; so adding
- * a key binding in one will also add it to the other.
- * @param copy The input handler to copy key bindings from
- * @param view The view
- */
- public DefaultInputHandler(View view, DefaultInputHandler copy)
- {
- this(view,copy.bindings);
- } //}}}
- //{{{ isPrefixActive() method
- /**
- * Returns if a prefix key has been pressed.
- */
- @Override
- public boolean isPrefixActive()
- {
- return bindings != currentBindings
- || super.isPrefixActive();
- } //}}}
- //{{{ setCurrentBindings() method
- @Override
- public void setCurrentBindings(Hashtable bindings)
- {
- view.getStatus().setMessage((String)bindings.get(PREFIX_STR));
- currentBindings = bindings;
- } //}}}
- //{{{ handleKey() method
- /**
- * Handles the given keystroke.
- * @param keyStroke The key stroke
- * @param dryRun only calculate the return value, do not have any other effect
- * @since jEdit 4.2pre5
- */
- public boolean handleKey(KeyEventTranslator.Key keyStroke,boolean dryRun)
- {
- char input = '\0';
- if(keyStroke.modifiers == null
- || keyStroke.modifiers.equals("S"))
- {
- switch(keyStroke.key)
- {
- case '\n':
- case '\t':
- input = (char)keyStroke.key;
- break;
- default:
- input = keyStroke.input;
- break;
- }
- }
- if(readNextChar != null)
- {
- if(input != '\0')
- {
- if (!dryRun)
- {
- setCurrentBindings(bindings);
- invokeReadNextChar(input);
- repeatCount = 1;
- }
- return true;
- }
- else
- {
- if (!dryRun)
- {
- readNextChar = null;
- view.getStatus().setMessage(null);
- }
- }
- }
- Object o = currentBindings.get(keyStroke);
- if(o == null)
- {
- if (!dryRun)
- {
- // Don't beep if the user presses some
- // key we don't know about unless a
- // prefix is active. Otherwise it will
- // beep when caps lock is pressed, etc.
- if(currentBindings != bindings)
- {
- Toolkit.getDefaultToolkit().beep();
- // F10 should be passed on, but C+e F10
- // shouldn't
- repeatCount = 1;
- setCurrentBindings(bindings);
- }
- else if(input != '\0')
- {
- if (!keyStroke.isFromGlobalContext())
- { // let user input be only local
- userInput(input);
- }
- }
- else
- {
- // this is retarded. excuse me while I drool
- // and make stupid noises
- if(KeyEventWorkaround.isNumericKeypad(keyStroke.key))
- KeyEventWorkaround.numericKeypadKey();
- }
- sendShortcutPrefixOff();
- }
- }
- else if(o instanceof Hashtable)
- {
- if (!dryRun)
- {
- setCurrentBindings((Hashtable)o);
- ShortcutPrefixActiveEvent.firePrefixStateChange(currentBindings, true);
- shortcutOn = true;
- }
- return true;
- }
- else if(o instanceof String)
- {
- if (!dryRun)
- {
- setCurrentBindings(bindings);
- sendShortcutPrefixOff();
- invokeAction((String)o);
- }
- return true;
- }
- else if(o instanceof EditAction)
- {
- if (!dryRun)
- {
- setCurrentBindings(bindings);
- sendShortcutPrefixOff();
- invokeAction((EditAction)o);
- }
- return true;
- }
- if (!dryRun)
- {
- sendShortcutPrefixOff();
- }
- return false;
- } //}}}
-
- //{{{ getSymbolicModifierName() method
- /**
- * Returns a the symbolic modifier name for the specified Java modifier
- * flag.
- *
- * @param mod A modifier constant from <code>InputEvent</code>
- *
- * @since jEdit 4.1pre3
- */
- public static char getSymbolicModifierName(int mod)
- {
- return KeyEventTranslator.getSymbolicModifierName(mod);
- } //}}}
- //{{{ getModifierString() method
- /**
- * Returns a string containing symbolic modifier names set in the
- * specified event.
- *
- * @param evt The event
- *
- * @since jEdit 4.1pre3
- */
- public static String getModifierString(InputEvent evt)
- {
- return KeyEventTranslator.getModifierString(evt);
- } //}}}
- }