1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "SpellChecker.h"
#include "Document.h"
#include "DocumentMarkerController.h"
#include "EditorClient.h"
#include "Frame.h"
#include "HTMLInputElement.h"
#include "HTMLTextAreaElement.h"
#include "Node.h"
#include "Page.h"
#include "PositionIterator.h"
#include "Range.h"
#include "RenderObject.h"
#include "Settings.h"
#include "TextCheckerClient.h"
#include "TextIterator.h"
#include "htmlediting.h"
namespace WebCore {
SpellChecker::SpellChecker(Frame* frame)
: m_frame(frame)
, m_requestSequence(0)
{
}
SpellChecker::~SpellChecker()
{
}
TextCheckerClient* SpellChecker::client() const
{
Page* page = m_frame->page();
if (!page)
return 0;
return page->editorClient()->textChecker();
}
bool SpellChecker::initRequest(Node* node)
{
ASSERT(canCheckAsynchronously(node));
String text = node->textContent();
if (!text.length())
return false;
m_requestNode = node;
m_requestText = text;
m_requestSequence++;
return true;
}
void SpellChecker::clearRequest()
{
m_requestNode.clear();
m_requestText = String();
}
bool SpellChecker::isAsynchronousEnabled() const
{
return m_frame->settings() && m_frame->settings()->asynchronousSpellCheckingEnabled();
}
bool SpellChecker::canCheckAsynchronously(Node* node) const
{
return client() && isCheckable(node) && isAsynchronousEnabled() && !isBusy();
}
bool SpellChecker::isBusy() const
{
return m_requestNode.get();
}
bool SpellChecker::isValid(int sequence) const
{
return m_requestNode.get() && m_requestText.length() && m_requestSequence == sequence;
}
bool SpellChecker::isCheckable(Node* node) const
{
return node && node->renderer();
}
void SpellChecker::requestCheckingFor(TextCheckingTypeMask mask, Node* node)
{
ASSERT(canCheckAsynchronously(node));
if (!initRequest(node))
return;
client()->requestCheckingOfString(this, m_requestSequence, mask, m_requestText);
}
static bool forwardIterator(PositionIterator& iterator, int distance)
{
int remaining = distance;
while (!iterator.atEnd()) {
if (iterator.node()->isCharacterDataNode()) {
int length = lastOffsetForEditing(iterator.node());
int last = length - iterator.offsetInLeafNode();
if (remaining < last) {
iterator.setOffsetInLeafNode(iterator.offsetInLeafNode() + remaining);
return true;
}
remaining -= last;
iterator.setOffsetInLeafNode(iterator.offsetInLeafNode() + last);
}
iterator.increment();
}
return false;
}
static DocumentMarker::MarkerType toMarkerType(TextCheckingType type)
{
if (type == TextCheckingTypeSpelling)
return DocumentMarker::Spelling;
ASSERT(type == TextCheckingTypeGrammar);
return DocumentMarker::Grammar;
}
// Currenntly ignoring TextCheckingResult::details but should be handled. See Bug 56368.
void SpellChecker::didCheck(int sequence, const Vector<TextCheckingResult>& results)
{
if (!isValid(sequence))
return;
if (!m_requestNode->renderer()) {
clearRequest();
return;
}
int startOffset = 0;
PositionIterator start = firstPositionInOrBeforeNode(m_requestNode.get());
for (size_t i = 0; i < results.size(); ++i) {
if (results[i].type != TextCheckingTypeSpelling && results[i].type != TextCheckingTypeGrammar)
continue;
// To avoid moving the position backward, we assume the given results are sorted with
// startOffset as the ones returned by [NSSpellChecker requestCheckingOfString:].
ASSERT(startOffset <= results[i].location);
if (!forwardIterator(start, results[i].location - startOffset))
break;
PositionIterator end = start;
if (!forwardIterator(end, results[i].length))
break;
// Users or JavaScript applications may change text while a spell-checker checks its
// spellings in the background. To avoid adding markers to the words modified by users or
// JavaScript applications, retrieve the words in the specified region and compare them with
// the original ones.
RefPtr<Range> range = Range::create(m_requestNode->document(), start, end);
// FIXME: Use textContent() compatible string conversion.
String destination = range->text();
String source = m_requestText.substring(results[i].location, results[i].length);
if (destination == source)
m_requestNode->document()->markers()->addMarker(range.get(), toMarkerType(results[i].type));
startOffset = results[i].location;
}
clearRequest();
}
} // namespace WebCore
|
