1/*
2 * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package apple.laf;
27
28import apple.laf.JRSUIConstants.*;
29
30@SuppressWarnings("unchecked")
31public class JRSUIState {
32//    static HashSet<JRSUIState> states = new HashSet<JRSUIState>();
33
34    final long encodedState;
35    long derivedEncodedState;
36
37    static JRSUIState prototype = new JRSUIState(0);
38    public static JRSUIState getInstance() {
39        return prototype.derive();
40    }
41
42    JRSUIState(final Widget widget) {
43        this(widget.apply(0));
44    }
45
46    JRSUIState(final long encodedState) {
47        this.encodedState = derivedEncodedState = encodedState;
48    }
49
50    boolean isDerivationSame() {
51        return encodedState == derivedEncodedState;
52    }
53
54    public <T extends JRSUIState> T derive() {
55        if (isDerivationSame()) return (T)this;
56        final T derivation = (T)createDerivation();
57
58//        if (!states.add(derivation)) {
59//            System.out.println("dupe: " + states.size());
60//        }
61
62        return derivation;
63    }
64
65    public <T extends JRSUIState> T createDerivation() {
66        return (T)new JRSUIState(derivedEncodedState);
67    }
68
69    public void reset() {
70        derivedEncodedState = encodedState;
71    }
72
73    public void set(final Property property) {
74        derivedEncodedState = property.apply(derivedEncodedState);
75    }
76
77    public void apply(final JRSUIControl control) {
78        control.setEncodedState(encodedState);
79    }
80
81    @Override
82    public boolean equals(final Object obj) {
83        if (!(obj instanceof JRSUIState)) return false;
84        return encodedState == ((JRSUIState)obj).encodedState && getClass().equals(obj.getClass());
85    }
86
87    public boolean is(Property property) {
88        return (byte)((derivedEncodedState & property.encoding.mask) >> property.encoding.shift) == property.ordinal;
89    }
90
91    @Override
92    public int hashCode() {
93        return (int)(encodedState ^ (encodedState >>> 32)) ^ getClass().hashCode();
94    }
95
96    public static class AnimationFrameState extends JRSUIState {
97        final int animationFrame;
98        int derivedAnimationFrame;
99
100        AnimationFrameState(final long encodedState, final int animationFrame) {
101            super(encodedState);
102            this.animationFrame = derivedAnimationFrame = animationFrame;
103        }
104
105        @Override
106        boolean isDerivationSame() {
107            return super.isDerivationSame() && (animationFrame == derivedAnimationFrame);
108        }
109
110        @Override
111        public <T extends JRSUIState> T createDerivation() {
112            return (T)new AnimationFrameState(derivedEncodedState, derivedAnimationFrame);
113        }
114
115        @Override
116        public void reset() {
117            super.reset();
118            derivedAnimationFrame = animationFrame;
119        }
120
121        public void setAnimationFrame(final int frame) {
122            this.derivedAnimationFrame = frame;
123        }
124
125        @Override
126        public void apply(final JRSUIControl control) {
127            super.apply(control);
128            control.set(Key.ANIMATION_FRAME, animationFrame);
129        }
130
131        @Override
132        public boolean equals(final Object obj) {
133            if (!(obj instanceof AnimationFrameState)) return false;
134            return animationFrame == ((AnimationFrameState)obj).animationFrame && super.equals(obj);
135        }
136
137        @Override
138        public int hashCode() {
139            return super.hashCode() ^ animationFrame;
140        }
141    }
142
143    public static class ValueState extends JRSUIState {
144        final double value;
145        double derivedValue;
146
147        ValueState(final long encodedState, final double value) {
148            super(encodedState);
149            this.value = derivedValue = value;
150        }
151
152        @Override
153        boolean isDerivationSame() {
154            return super.isDerivationSame() && (value == derivedValue);
155        }
156
157        @Override
158        public <T extends JRSUIState> T createDerivation() {
159            return (T)new ValueState(derivedEncodedState, derivedValue);
160        }
161
162        @Override
163        public void reset() {
164            super.reset();
165            derivedValue = value;
166        }
167
168        public void setValue(final double value) {
169            derivedValue = value;
170        }
171
172        @Override
173        public void apply(final JRSUIControl control) {
174            super.apply(control);
175            control.set(Key.VALUE, value);
176        }
177
178        @Override
179        public boolean equals(final Object obj) {
180            if (!(obj instanceof ValueState)) return false;
181            return value == ((ValueState)obj).value && super.equals(obj);
182        }
183
184        @Override
185        public int hashCode() {
186            final long bits = Double.doubleToRawLongBits(value);
187            return super.hashCode() ^ (int)bits ^ (int)(bits >>> 32);
188        }
189    }
190
191    public static class TitleBarHeightState extends ValueState {
192        TitleBarHeightState(final long encodedState, final double value) {
193            super(encodedState, value);
194        }
195
196        @Override
197        public <T extends JRSUIState> T createDerivation() {
198            return (T)new TitleBarHeightState(derivedEncodedState, derivedValue);
199        }
200
201        @Override
202        public void apply(final JRSUIControl control) {
203            super.apply(control);
204            control.set(Key.WINDOW_TITLE_BAR_HEIGHT, value);
205        }
206    }
207
208    public static class ScrollBarState extends ValueState {
209        final double thumbProportion;
210        double derivedThumbProportion;
211        final double thumbStart;
212        double derivedThumbStart;
213
214        ScrollBarState(final long encodedState, final double value, final double thumbProportion, final double thumbStart) {
215            super(encodedState, value);
216            this.thumbProportion = derivedThumbProportion = thumbProportion;
217            this.thumbStart = derivedThumbStart = thumbStart;
218        }
219
220        @Override
221        boolean isDerivationSame() {
222            return super.isDerivationSame() && (thumbProportion == derivedThumbProportion) && (thumbStart == derivedThumbStart);
223        }
224
225        @Override
226        public <T extends JRSUIState> T createDerivation() {
227            return (T)new ScrollBarState(derivedEncodedState, derivedValue, derivedThumbProportion, derivedThumbStart);
228        }
229
230        @Override
231        public void reset() {
232            super.reset();
233            derivedThumbProportion = thumbProportion;
234            derivedThumbStart = thumbStart;
235        }
236
237        public void setThumbPercent(final double thumbPercent) {
238            derivedThumbProportion = thumbPercent;
239        }
240
241        public void setThumbStart(final double thumbStart) {
242            derivedThumbStart = thumbStart;
243        }
244
245        @Override
246        public void apply(final JRSUIControl control) {
247            super.apply(control);
248            control.set(Key.THUMB_PROPORTION, thumbProportion);
249            control.set(Key.THUMB_START, thumbStart);
250        }
251
252        @Override
253        public boolean equals(final Object obj) {
254            if (!(obj instanceof ScrollBarState)) return false;
255            return (thumbProportion == ((ScrollBarState)obj).thumbProportion) && (thumbStart == ((ScrollBarState)obj).thumbStart) && super.equals(obj);
256        }
257
258        @Override
259        public int hashCode() {
260            final long bits = Double.doubleToRawLongBits(thumbProportion) ^ Double.doubleToRawLongBits(thumbStart);
261            return super.hashCode() ^ (int)bits ^ (int)(bits >>> 32);
262        }
263    }
264}
265