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New file used by the new key binding engine

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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@12733 72102866-910b-0410-8b05-ffd578937521
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Nicola Pero 2002-02-25 01:45:38 +00:00
parent 7224c000f8
commit 59dcc3e891
4 changed files with 562 additions and 0 deletions
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Source/GSKeyBindingTable.m Normal file
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/* GSKeyBindingTable.m -*-objc-*-
Copyright (C) 2002 Free Software Foundation, Inc.
Author: Nicola Pero <n.pero@mi.flashnet.it>
Date: February 2002
This file is part of the GNUstep GUI Library.
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; see the file COPYING.LIB.
If not, write to the Free Software Foundation,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "GSKeyBindingAction.h"
#include "GSKeyBindingTable.h"
#include <AppKit/NSInputManager.h>
#include <AppKit/NSEvent.h>
@implementation GSKeyBindingTable : NSObject
- (void) loadBindingsFromDictionary: (NSDictionary *)dict
{
NSEnumerator *e;
NSString *key;
e = [dict keyEnumerator];
while ((key = [e nextObject]) != nil)
{
[self bindKey: key toAction: [dict objectForKey: key]];
}
}
- (void) bindKey: (NSString *)key toAction: (id)action
{
unichar character;
int modifiers;
BOOL isFunctionKey;
GSKeyBindingAction *a = nil;
GSKeyBindingTable *t = nil;
BOOL noNeedToInsert = NO;
int i;
if (![NSInputManager parseKey: key
intoCharacter: &character
andModifiers: &modifiers])
{
NSLog (@"GSKeyBindingTable - Could not bind key %@", key);
return;
}
/* If it is not a function key, we automatically bind the key both
with Shift and without (because we don't know if it's typed with
shift or without). */
isFunctionKey = modifiers & NSFunctionKeyMask;
/* Ignore all other modifiers when storing the keystroke modifiers. */
modifiers = modifiers & (NSShiftKeyMask
| NSAlternateKeyMask
| NSControlKeyMask
| NSNumericPadKeyMask);
/* Now build the associated action/table. */
if ([action isKindOfClass: [NSString class]])
{
/* "" as action means disable the keybinding. It can be used to
override a previous keybinding. */
if ([(NSString *)action isEqualToString: @""])
{
a = nil;
}
else
{
a = [[GSKeyBindingActionSelector alloc]
initWithSelectorName: (NSString *)action];
AUTORELEASE (a);
}
}
else if ([action isKindOfClass: [NSArray class]])
{
a = [[GSKeyBindingActionSelectorArray alloc]
initWithSelectorNames: (NSArray *)action];
AUTORELEASE (a);
}
else if ([action isKindOfClass: [NSDictionary class]])
{
t = [[GSKeyBindingTable alloc] init];
[t loadBindingsFromDictionary: (NSDictionary *)action];
AUTORELEASE (t);
}
else if ([action isKindOfClass: [GSKeyBindingAction class]])
{
a = action;
}
/* Ok - at this point, we have all the elements ready, we just need
to insert into the table. */
/* Check if there are already some bindings for this keystroke. */
for (i = 0; i < _bindingsCount; i++)
{
if (_bindings[i].character == character)
{
/* Uhmm ... suspiciously similar. Let's check the
modifiers. */
BOOL found = NO;
if (isFunctionKey)
{
/* Function keys must have all modifiers perfectly the
same. */
if (_bindings[i].modifiers == modifiers)
{
found = YES;
}
}
else
{
/* Non function keys might differ by a Shift. */
int mask = ~NSShiftKeyMask;
if ((_bindings[i].modifiers & mask) == (modifiers & mask))
{
found = YES;
}
}
if (found)
{
/* Replace/override the existing action/table with the
new ones. */
RETAIN (a);
_bindings[i].action = a;
RETAIN (t);
_bindings[i].table = t;
noNeedToInsert = YES;
}
}
}
if (noNeedToInsert)
{
return;
}
/* Ok - allocate memory for the new binding. */
{
int newKeyBindings;
if (isFunctionKey)
{
newKeyBindings = 1;
}
else
{
/* Need to allocate two, for the binding with and without
Shift. */
newKeyBindings = 2;
}
if (_bindingsCount == 0)
{
_bindingsCount = newKeyBindings;
_bindings = objc_malloc (sizeof (struct _GSKeyBinding)
* newKeyBindings);
}
else
{
_bindingsCount += newKeyBindings;
_bindings = objc_realloc (_bindings, sizeof (struct _GSKeyBinding)
* _bindingsCount);
}
_bindings[_bindingsCount - 1].character = character;
_bindings[_bindingsCount - 1].modifiers = modifiers;
_bindings[_bindingsCount - 1].action = a;
RETAIN (a);
_bindings[_bindingsCount - 1].table = t;
RETAIN (t);
if (!isFunctionKey)
{
modifiers |= NSShiftKeyMask;
_bindings[_bindingsCount - 2].character = character;
_bindings[_bindingsCount - 2].modifiers = modifiers;
_bindings[_bindingsCount - 2].action = a;
RETAIN (a);
_bindings[_bindingsCount - 2].table = t;
RETAIN (t);
}
}
}
- (BOOL) lookupKeyStroke: (unichar)character
modifiers: (int)flags
returningActionIn: (GSKeyBindingAction **)action
tableIn: (GSKeyBindingTable **)table
{
int i;
for (i = 0; i < _bindingsCount; i++)
{
if (_bindings[i].character == character)
{
if (_bindings[i].modifiers == flags)
{
if (_bindings[i].action == nil && _bindings[i].table == nil)
{
/* Found the keybinding, but it is disabled! */
return NO;
}
else
{
*action = _bindings[i].action;
*table = _bindings[i].table;
return YES;
}
}
}
}
return NO;
}
- (void) dealloc
{
int i;
for (i = 0; i < _bindingsCount; i++)
{
RELEASE (_bindings[i].action);
RELEASE (_bindings[i].table);
}
objc_free (_bindings);
[super dealloc];
}
@end