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annotate src/stringfilter.cpp @ 20706:79930f9362c3 draft

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-Change: [Win32] Position the IME composition window at the caret position.
author Michael Lutz <michi@icosahedron.de>
date Sun, 07 Apr 2013 17:10:38 +0200 (2013-04-07)
parents 817b521c2b1a
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
19434
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1 /* $Id$ */
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2
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3 /*
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4 * This file is part of OpenTTD.
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5 * 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.
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6 * 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.
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7 * 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/>.
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8 */
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9
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10 /** @file stringfilter.cpp Searching and filtering using a stringterm. */
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11
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12 #include "stdafx.h"
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13 #include "string_func.h"
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14 #include "strings_func.h"
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15 #include "stringfilter_type.h"
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16 #include "gfx_func.h"
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17
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18 static const WChar STATE_WHITESPACE = ' ';
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19 static const WChar STATE_WORD = 'w';
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20 static const WChar STATE_QUOTE1 = '\'';
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21 static const WChar STATE_QUOTE2 = '"';
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22
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23 /**
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24 * Set the term to filter on.
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25 * @param str Filter term
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26 */
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27 void StringFilter::SetFilterTerm(const char *str)
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28 {
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29 this->word_index.Reset();
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30 this->word_matches = 0;
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31 free(this->filter_buffer);
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32
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33 assert(str != NULL);
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34
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35 char *dest = (char *)malloc(strlen(str) + 1);
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36 this->filter_buffer = dest;
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37
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38 WChar state = STATE_WHITESPACE;
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39 const char *pos = str;
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40 WordState *word = NULL;
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41 size_t len;
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42 for (;; pos += len) {
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43 WChar c;
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44 len = Utf8Decode(&c, pos);
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45
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46 if (c == 0 || (state == STATE_WORD && IsWhitespace(c))) {
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47 /* Finish word */
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48 if (word != NULL) {
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49 *(dest++) = '\0';
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50 word = NULL;
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51 }
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52 state = STATE_WHITESPACE;
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53 if (c != 0) continue; else break;
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54 }
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55
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56 if (state == STATE_WHITESPACE) {
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57 /* Skip whitespace */
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58 if (IsWhitespace(c)) continue;
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59 state = STATE_WORD;
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60 }
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61
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62 if (c == STATE_QUOTE1 || c == STATE_QUOTE2) {
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63 if (state == c) {
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64 /* Stop quoting */
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65 state = STATE_WORD;
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66 continue;
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67 } else if (state == STATE_WORD) {
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68 /* Start quoting */
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69 state = c;
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70 continue;
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71 }
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72 }
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73
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74 /* Add to word */
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75 if (word == NULL) {
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76 word = this->word_index.Append();
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77 word->start = dest;
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78 word->match = false;
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79 }
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80
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81 memcpy(dest, pos, len);
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82 dest += len;
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83 }
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84 }
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85
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86 /**
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87 * Reset the matching state to process a new item.
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88 */
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89 void StringFilter::ResetState()
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90 {
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91 this->word_matches = 0;
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92 const WordState *end = this->word_index.End();
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93 for (WordState *it = this->word_index.Begin(); it != end; ++it) {
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94 it->match = false;
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95 }
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96 }
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97
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98 /**
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99 * Pass another text line from the current item to the filter.
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100 *
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101 * You can call this multiple times for a single item, if the filter shall apply to multiple things.
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102 * Before processing the next item you have to call ResetState().
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103 *
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104 * @param str Another line from the item.
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105 */
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106 void StringFilter::AddLine(const char *str)
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107 {
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108 if (str == NULL) return;
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109
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110 bool match_case = this->case_sensitive != NULL && *this->case_sensitive;
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111 const WordState *end = this->word_index.End();
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112 for (WordState *it = this->word_index.Begin(); it != end; ++it) {
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113 if (!it->match) {
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114 if ((match_case ? strstr(str, it->start) : strcasestr(str, it->start)) != NULL) {
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115 it->match = true;
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116 this->word_matches++;
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117 }
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118 }
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119 }
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120 }
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121
19711
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122 /**
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123 * Pass another text line from the current item to the filter.
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124 *
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125 * You can call this multiple times for a single item, if the filter shall apply to multiple things.
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126 * Before processing the next item you have to call ResetState().
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127 *
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128 * @param str Another line from the item.
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129 */
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130 void StringFilter::AddLine(StringID str)
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131 {
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132 char buffer[DRAW_STRING_BUFFER];
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133 GetString(buffer, str, lastof(buffer));
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134 AddLine(buffer);
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135 }