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
|
/*
* Copyright 2010, The Android Open Source Project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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 THE COPYRIGHT HOLDERS ``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.
*/
#define LOG_TAG "hyphenation_android"
#include "config.h"
#include "Hyphenation.h"
#include "NotImplemented.h"
#include <utils/AssetManager.h>
#include "wtf/text/CString.h"
#include "wtf/text/WTFString.h"
// For external hyphenation library.
#include "hyphen.h"
extern android::AssetManager* globalAssetManager();
using namespace WTF;
namespace WebCore {
static HyphenDict* getHyphenDict() {
static HyphenDict *dict = 0;
static bool isDictInitialized = false;
if (!isDictInitialized && !dict) {
isDictInitialized = true;
android::AssetManager* am = globalAssetManager();
// Only support English for now.
android::Asset* a = am->open("webkit/hyph_en_US.dic",
android::Asset::ACCESS_BUFFER);
if (!a) {
LOGW("asset webkit/hyph_en_US.dic not found!");
return 0;
}
LOGD("dictionary length is %d", a->getLength());
const CString dictContents = String(static_cast<const char*>(a->getBuffer(false)),
a->getLength()).utf8();
dict = hnj_hyphen_load_from_buffer(dictContents.data(),
dictContents.length());
delete a;
}
return dict;
}
size_t lastHyphenLocation(const UChar* characters, size_t length, size_t beforeIndex)
{
static const size_t MIN_WORD_LEN = 5;
static const size_t MAX_WORD_LEN = 100;
if (beforeIndex <= 0 || length < MIN_WORD_LEN || length > MAX_WORD_LEN)
return 0;
HyphenDict *dict = getHyphenDict();
if (!dict)
return 0;
char word[MAX_WORD_LEN];
for (size_t i = 0; i < length; ++i) {
const UChar ch = characters[i];
// Only English for now.
// To really make it language aware, we need something like language
// detection or rely on the langAttr in the html element. Though
// seems right now the langAttr is not used or quite implemented in
// webkit.
if (!isASCIIAlpha(ch))
return 0;
word[i] = ch;
}
static const int EXTRA_BUFFER = 5;
char hyphens[MAX_WORD_LEN + EXTRA_BUFFER];
if (hnj_hyphen_hyphenate(dict, word, length, hyphens) == 0)
for (size_t i = beforeIndex - 1; i > 0; --i) {
if (hyphens[i] & 1)
return i + 1;
}
return 0;
}
} // namespace WebCore
|
