1 /*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "core/html/ime/InputMethodContext.h"
33
34 #include "core/dom/Text.h"
35 #include "core/editing/InputMethodController.h"
36 #include "core/html/ime/Composition.h"
37 #include "core/frame/Frame.h"
38
39 namespace WebCore {
40
create(HTMLElement * element)41 PassOwnPtr<InputMethodContext> InputMethodContext::create(HTMLElement* element)
42 {
43 return adoptPtr(new InputMethodContext(element));
44 }
45
InputMethodContext(HTMLElement * element)46 InputMethodContext::InputMethodContext(HTMLElement* element)
47 : m_element(element)
48 {
49 ScriptWrappable::init(this);
50 }
51
~InputMethodContext()52 InputMethodContext::~InputMethodContext()
53 {
54 }
55
composition()56 Composition* InputMethodContext::composition()
57 {
58 if (!m_composition)
59 m_composition = Composition::create(this);
60 return m_composition.get();
61 }
62
locale() const63 String InputMethodContext::locale() const
64 {
65 // FIXME: Implement this.
66 return emptyString();
67 }
68
target() const69 HTMLElement* InputMethodContext::target() const
70 {
71 return m_element;
72 }
73
compositionStartOffset()74 unsigned InputMethodContext::compositionStartOffset()
75 {
76 if (hasFocus())
77 return inputMethodController().compositionStart();
78 return 0;
79 }
80
compositionEndOffset()81 unsigned InputMethodContext::compositionEndOffset()
82 {
83 if (hasFocus())
84 return inputMethodController().compositionEnd();
85 return 0;
86 }
87
confirmComposition()88 void InputMethodContext::confirmComposition()
89 {
90 if (hasFocus())
91 inputMethodController().confirmCompositionAndResetState();
92 }
93
hasFocus() const94 bool InputMethodContext::hasFocus() const
95 {
96 Frame* frame = m_element->document().frame();
97 if (!frame)
98 return false;
99
100 const Element* element = frame->document()->focusedElement();
101 return element && element->isHTMLElement() && m_element == toHTMLElement(element);
102 }
103
compositionText() const104 String InputMethodContext::compositionText() const
105 {
106 if (!hasFocus())
107 return emptyString();
108
109 Text* text = inputMethodController().compositionNode();
110 return text ? text->wholeText() : emptyString();
111 }
112
selectedSegment() const113 CompositionUnderline InputMethodContext::selectedSegment() const
114 {
115 CompositionUnderline underline;
116 if (!hasFocus())
117 return underline;
118
119 const InputMethodController& controller = inputMethodController();
120 if (!controller.hasComposition())
121 return underline;
122
123 Vector<CompositionUnderline> underlines = controller.customCompositionUnderlines();
124 for (size_t i = 0; i < underlines.size(); ++i) {
125 if (underlines[i].thick)
126 return underlines[i];
127 }
128
129 // When no underline information is available while composition exists,
130 // build a CompositionUnderline whose element is the whole composition.
131 underline.endOffset = controller.compositionEnd() - controller.compositionStart();
132 return underline;
133
134 }
135
selectionStart() const136 int InputMethodContext::selectionStart() const
137 {
138 return selectedSegment().startOffset;
139 }
140
selectionEnd() const141 int InputMethodContext::selectionEnd() const
142 {
143 return selectedSegment().endOffset;
144 }
145
segments()146 const Vector<unsigned>& InputMethodContext::segments()
147 {
148 m_segments.clear();
149 if (!hasFocus())
150 return m_segments;
151 const InputMethodController& controller = inputMethodController();
152 if (!controller.hasComposition())
153 return m_segments;
154
155 Vector<CompositionUnderline> underlines = controller.customCompositionUnderlines();
156 if (!underlines.size()) {
157 m_segments.append(0);
158 } else {
159 for (size_t i = 0; i < underlines.size(); ++i)
160 m_segments.append(underlines[i].startOffset);
161 }
162
163 return m_segments;
164 }
165
inputMethodController() const166 InputMethodController& InputMethodContext::inputMethodController() const
167 {
168 return m_element->document().frame()->inputMethodController();
169 }
170
interfaceName() const171 const AtomicString& InputMethodContext::interfaceName() const
172 {
173 return EventTargetNames::InputMethodContext;
174 }
175
executionContext() const176 ExecutionContext* InputMethodContext::executionContext() const
177 {
178 return &m_element->document();
179 }
180
dispatchCandidateWindowShowEvent()181 void InputMethodContext::dispatchCandidateWindowShowEvent()
182 {
183 dispatchEvent(Event::create(EventTypeNames::candidatewindowshow));
184 }
185
dispatchCandidateWindowUpdateEvent()186 void InputMethodContext::dispatchCandidateWindowUpdateEvent()
187 {
188 dispatchEvent(Event::create(EventTypeNames::candidatewindowupdate));
189 }
190
dispatchCandidateWindowHideEvent()191 void InputMethodContext::dispatchCandidateWindowHideEvent()
192 {
193 dispatchEvent(Event::create(EventTypeNames::candidatewindowhide));
194 }
195
196 } // namespace WebCore
197