blob: 616fd9854e104c214a1b726673ad025f0e765f7f (
plain)
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
|
/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file stringfilter.cpp Searching and filtering using a stringterm. */
#include "stdafx.h"
#include "string_func.h"
#include "stringfilter_type.h"
static const WChar STATE_WHITESPACE = ' ';
static const WChar STATE_WORD = 'w';
static const WChar STATE_QUOTE1 = '\'';
static const WChar STATE_QUOTE2 = '"';
/**
* Set the term to filter on.
* @param str Filter term
*/
void StringFilter::SetFilterTerm(const char *str)
{
this->word_index.Reset();
this->word_matches = 0;
free(this->filter_buffer);
assert(str != NULL);
char *dest = (char *)malloc(strlen(str) + 1);
this->filter_buffer = dest;
WChar state = STATE_WHITESPACE;
const char *pos = str;
WordState *word = NULL;
size_t len;
for (;; pos += len) {
WChar c;
len = Utf8Decode(&c, pos);
if (c == 0 || (state == STATE_WORD && IsWhitespace(c))) {
/* Finish word */
if (word != NULL) {
*(dest++) = '\0';
word = NULL;
}
state = STATE_WHITESPACE;
if (c != 0) continue; else break;
}
if (state == STATE_WHITESPACE) {
/* Skip whitespace */
if (IsWhitespace(c)) continue;
state = STATE_WORD;
}
if (c == STATE_QUOTE1 || c == STATE_QUOTE2) {
if (state == c) {
/* Stop quoting */
state = STATE_WORD;
continue;
} else if (state == STATE_WORD) {
/* Start quoting */
state = c;
continue;
}
}
/* Add to word */
if (word == NULL) {
word = this->word_index.Append();
word->start = dest;
word->match = false;
}
memcpy(dest, pos, len);
dest += len;
}
}
/**
* Reset the matching state to process a new item.
*/
void StringFilter::ResetState()
{
this->word_matches = 0;
const WordState *end = this->word_index.End();
for (WordState *it = this->word_index.Begin(); it != end; ++it) {
it->match = false;
}
}
/**
* Pass another text line from the current item to the filter.
*
* You can call this multiple times for a single item, if the filter shall apply to multiple things.
* Before processing the next item you have to call ResetState().
*
* @param str Another line from the item.
*/
void StringFilter::AddLine(const char *str)
{
if (str == NULL) return;
bool match_case = this->case_sensitive != NULL && *this->case_sensitive;
const WordState *end = this->word_index.End();
for (WordState *it = this->word_index.Begin(); it != end; ++it) {
if (!it->match) {
if ((match_case ? strstr(str, it->start) : strcasestr(str, it->start)) != NULL) {
it->match = true;
this->word_matches++;
}
}
}
}
|
