1 /*
2 * Copyright (c) 2011, 2014, 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
26 package com.sun.javafx.webkit;
27
28 import java.lang.ref.WeakReference;
29 import java.util.ArrayList;
30 import java.util.List;
31
32 import com.sun.javafx.scene.input.ExtendedInputMethodRequests;
33 import javafx.geometry.Point2D;
34 import javafx.scene.input.InputMethodEvent;
35 import javafx.scene.input.InputMethodHighlight;
36 import javafx.scene.input.InputMethodRequests;
37 import javafx.scene.input.InputMethodTextRun;
38 import javafx.scene.web.WebView;
39
40 import com.sun.webkit.InputMethodClient;
41 import com.sun.webkit.WebPage;
42 import com.sun.webkit.event.WCInputMethodEvent;
43 import com.sun.webkit.graphics.WCPoint;
44
45 public final class InputMethodClientImpl
46 implements InputMethodClient, ExtendedInputMethodRequests
47 {
48 private final WeakReference<WebView> wvRef;
49 private final WebPage webPage;
50
51 // the state of the last setInputMethodState() call.
52 private boolean state;
53
54 public InputMethodClientImpl(WebView wv, WebPage webPage) {
55 this.wvRef = new WeakReference<WebView>(wv);
56 this.webPage = webPage;
57 if (webPage != null) {
58 webPage.setInputMethodClient(this);
59 }
60 }
61
62 public void activateInputMethods(final boolean doActivate) {
63 WebView wv = wvRef.get();
64 if (wv != null && wv.getScene() != null) {
65 wv.getScene().impl_enableInputMethodEvents(doActivate);
66 }
67 state = doActivate;
68 }
69
70 public boolean getInputMethodState() {
71 return state;
72 }
73
74 /**
75 * Converts the given InputMethodEvent to a WCInputMethodEvent.
76 */
77 public static WCInputMethodEvent convertToWCInputMethodEvent(InputMethodEvent ie) {
78 List<Integer> underlines = new ArrayList<Integer>();
79 StringBuilder composed = new StringBuilder();
80 int pos = 0;
81
82 // Scan the given composedText to find input method highlight attribute runs.
83 for (InputMethodTextRun run : ie.getComposed()) {
84 String rawText = run.getText();
85
86 // Convert highlight information of the attribute run into a
87 // CompositionUnderline.
88 InputMethodHighlight imh = run.getHighlight();
89 underlines.add(pos);
90 underlines.add(pos + rawText.length());
91 // WebKit CompostionUnderline supports only two kinds of highlighting
92 // attributes, thin and thick underlines. The SELECTED_CONVERTED
93 // and SELECTED_RAW attributes of JavaFX are mapped to the thick one.
94 underlines.add((imh == InputMethodHighlight.SELECTED_CONVERTED ||
95 imh == InputMethodHighlight.SELECTED_RAW) ? 1 : 0);
96 pos += rawText.length();
97 composed.append(rawText);
98 }
99
100 int size = underlines.size();
101 // In case there's no highlight information, create an underline element
102 // for the entire text
103 if (size == 0) {
104 underlines.add(0);
105 underlines.add(pos);
106 underlines.add(0); // thin underline
107 size = underlines.size();
108 }
109 int[] attributes = new int[size];
110 for (int i = 0; i < size; i++) {
111 attributes[i] = underlines.get(i);
112 }
113
114 return new WCInputMethodEvent(ie.getCommitted(), composed.toString(),
115 attributes, ie.getCaretPosition());
116 }
117
118 // InputMethodRequests implementation
119 public Point2D getTextLocation(int offset) {
120 int[] loc = webPage.getClientTextLocation(offset);
121 WCPoint point = webPage.getPageClient().windowToScreen(
122 // We need lower left corner of the char bounds rectangle here
123 new WCPoint(loc[0], loc[1] + loc[3]));
124 return new Point2D(point.getIntX(), point.getIntY());
125 }
126
127 public int getLocationOffset(int x, int y) {
128 WCPoint point = webPage.getPageClient().windowToScreen(new WCPoint(0, 0));
129 return webPage.getClientLocationOffset(x - point.getIntX(), y - point.getIntY());
130 }
131
132 public void cancelLatestCommittedText() {
133 // "Undo commit" is not supported.
134 }
135
136 public String getSelectedText() {
137 return webPage.getClientSelectedText();
138 }
139
140 @Override
141 public int getInsertPositionOffset() {
142 return webPage.getClientInsertPositionOffset();
143 }
144
145 @Override
146 public String getCommittedText(int begin, int end) {
147 try {
148 return webPage.getClientCommittedText().substring(begin, end);
149 } catch (StringIndexOutOfBoundsException e) {
150 throw new IllegalArgumentException(e);
151 }
152 }
153
154 @Override
155 public int getCommittedTextLength() {
156 return webPage.getClientCommittedTextLength();
157 }
158 }