1 /*
2 * Copyright (c) 2010, 2013, 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 package com.sun.glass.ui.gtk;
26
27 import com.sun.glass.ui.Pixels;
28 import com.sun.glass.ui.View;
29 import java.nio.Buffer;
30 import java.nio.ByteBuffer;
31 import java.nio.IntBuffer;
32 import java.util.Map;
33
34 final class GtkView extends View {
35
36 private boolean imEnabled = false;
37 private boolean isInPreeditMode = false;
38 private final StringBuilder preedit = new StringBuilder();
39 private int lastCaret;
40
41 private native void enableInputMethodEventsImpl(long ptr, boolean enable);
42
43 @Override
44 protected void _enableInputMethodEvents(long ptr, boolean enable) {
45 enableInputMethodEventsImpl(ptr, enable);
46 if (imEnabled) {
47 preedit.setLength(0);
48 }
49 imEnabled = enable;
50 }
51
52 @Override
53 protected native long _create(Map caps);
54
55 @Override
56 protected native long _getNativeView(long ptr);
57
58 @Override
59 protected native int _getX(long ptr);
60
61 @Override
62 protected native int _getY(long ptr);
63
64 @Override
65 protected native void _setParent(long ptr, long parentPtr);
66
67 @Override
68 protected native boolean _close(long ptr);
69
70 @Override
71 protected native void _scheduleRepaint(long ptr);
72
73 @Override
74 protected void _begin(long ptr) {}
75
76 @Override
77 protected void _end(long ptr) {}
78
79 @Override
80 protected void _uploadPixels(long ptr, Pixels pixels) {
81 Buffer data = pixels.getPixels();
82 if (data.isDirect() == true) {
83 _uploadPixelsDirect(ptr, data, pixels.getWidth(), pixels.getHeight());
84 } else if (data.hasArray() == true) {
85 if (pixels.getBytesPerComponent() == 1) {
86 ByteBuffer bytes = (ByteBuffer)data;
87 _uploadPixelsByteArray(ptr, bytes.array(), bytes.arrayOffset(), pixels.getWidth(), pixels.getHeight());
88 } else {
89 IntBuffer ints = (IntBuffer)data;
90 _uploadPixelsIntArray(ptr, ints.array(), ints.arrayOffset(), pixels.getWidth(), pixels.getHeight());
91 }
92 } else {
93 // gznote: what are the circumstances under which this can happen?
94 _uploadPixelsDirect(ptr, pixels.asByteBuffer(), pixels.getWidth(), pixels.getHeight());
95 }
96 }
97 private native void _uploadPixelsDirect(long viewPtr, Buffer pixels, int width, int height);
98 private native void _uploadPixelsByteArray(long viewPtr, byte[] pixels, int offset, int width, int height);
99 private native void _uploadPixelsIntArray(long viewPtr, int[] pixels, int offset, int width, int height);
100
101 @Override
102 protected native boolean _enterFullscreen(long ptr, boolean animate, boolean keepRatio, boolean hideCursor);
103
104 @Override
105 protected native void _exitFullscreen(long ptr, boolean animate);
106
107 @Override
108 protected void _finishInputMethodComposition(long ptr) {
109 if (imEnabled && isInPreeditMode) {
110 // Discard any pre-edited text
111 preedit.setLength(0);
112 notifyInputMethod(preedit.toString(), null, null, null, 0, 0, 0);
113 }
114 }
115
116 private void notifyPreeditMode(boolean enabled){
117 isInPreeditMode = enabled;
118 }
119
120 protected void notifyInputMethodDraw(String text, int first, int length, int caret) {
121 if (text != null) {
122 preedit.replace(first, first + length, text);
123 } else {
124 preedit.setLength(0);
125 }
126 notifyInputMethod(preedit.toString(), null, null, null, 0, caret, 0);
127 lastCaret = caret;
128 }
129
130 protected void notifyInputMethodCaret(int pos, int direction, int style) {
131 switch (direction) {
132 case 0: //XIMForwardChar
133 lastCaret += pos;
134 break;
135 case 1: //XIMBackwardChar
136 lastCaret -= pos;
137 break;
138 case 10: //XIMAbsolute
139 lastCaret = pos;
140 break;
141 default:
142 //TODO: as we don't know the text structure, we cannot compute the position
143 // for other directions (like forward words, lines, etc...).
144 // Luckily, vast majority of IM uses XIMAbsolute (10)
145 }
146 notifyInputMethod(preedit.toString(), null, null, null, 0, lastCaret, 0);
147 }
148 }