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annotate mde/content/ValueCache.d @ 156:36df0ffe34d2

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Fix to reload translations.
author Diggory Hardy <diggory.hardy@gmail.com>
date Sat, 18 Apr 2009 21:51:03 +0200
parents 9f035cd139c6
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* LICENSE BLOCK
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2 Part of mde: a Modular D game-oriented Engine
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3 Copyright © 2007-2008 Diggory Hardy
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5 This program is free software: you can redistribute it and/or modify it under
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6 the terms of the GNU General Public License as published by the Free Software
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7 Foundation, either version 2 of the License, or (at your option) any later version.
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9 This program is distributed in the hope that it will be useful, but WITHOUT ANY
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10 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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11 PARTICULAR PURPOSE. See the GNU General Public License for more details.
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13 You should have received a copy of the GNU General Public License
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14 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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16 /******************************************************************************
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17 * This module is used to load and save content values to/from a struct.
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18 *****************************************************************************/
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19 module mde.content.ValueCache;
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21 import mde.file.paths;
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22 import mde.file.mergetag.MTTagReader;
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23 import mde.file.mergetag.MTTagWriter;
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24 import mde.file.serialize;
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25
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26 import tango.util.log.Log : Log, Logger;
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27 private Logger logger;
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28 static this () {
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29 logger = Log.getLogger ("mde.gui.content.ValueCache");
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30 }
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31
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32 typedef char[] enumVal; // use a char[] to save enum values (it's more resiliant to change of the enum type)
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33
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34 struct ValueCache {
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35 //BEGIN Templates
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36 package static {
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37 // All supported content types for generic saving and loading:
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38 template store(A...) { alias A store; }
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39 alias store!(bool, int, double, char[], enumVal) TYPES;
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40
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41 // Get name of a type. Basically just stringof, but special handling for arrays.
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42 // Use TName!(T) for a valid symbol name, and T.stringof for a type.
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43 template TName(T : T[]) {
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44 const char[] TName = TName!(T) ~ "A";
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45 }
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46 template TName(T) {
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47 const char[] TName = T.stringof;
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48 }
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49 template Vars(A...) {
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50 static if (A.length) {
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51 static if (is (A[0] == enumVal))
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52 const char[] Vars = `char[][char[]] `~TName!(A[0])~`Data;` ~ Vars!(A[1..$]);
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53 else
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54 const char[] Vars = A[0].stringof~`[char[]] `~TName!(A[0])~`Data;` ~ Vars!(A[1..$]);
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55 } else
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56 const char[] Vars = ``;
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57 }
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58
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59 // For reading tags
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60 template readTagMixin(T, A...) {
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61 const char[] ifBlock = `if (reader.tagType == "`~T.stringof~`") {
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62 auto p = symBuf[0..symEnd] in `~TName!(T)~`Data;
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63 if (p is null)
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64 `~TName!(T)~`Data[symBuf[0..symEnd].dup] = deserialize!(typeof(`~TName!(T)~`Data.values[0])) (reader.tagData);
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65 }`;
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66 static if (A.length)
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67 const char[] readTagMixin = ifBlock~` else `~readTagMixin!(A).readTagMixin;
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68 else
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69 const char[] readTagMixin = ifBlock;
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70 }
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71
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72 // For writing tags
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73 template writeTagMixin(A...) {
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74 static if (A.length)
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75 const char[] writeTagMixin =
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76 `typeStr = "`~A[0].stringof~`";
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77 foreach (sym,val; `~TName!(A[0])~`Data) {
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78 MTTagStrings tag;
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79 tag.type = typeStr;
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80 tag.data = serialize (val);
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81 // Take section prefix as MT section
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82 size_t dot;
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83 while (dot < sym.length && sym[dot] != '.') ++dot;
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84 if (dot == sym.length) { // no prefix; use ""
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85 dot = 0;
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86 tag.id = sym;
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87 } else
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88 tag.id = sym[dot+1..$];
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89 secs[sym[0..dot]] ~= tag;
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90 }` ~ writeTagMixin!(A[1..$]);
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91 else
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92 const char[] writeTagMixin = ``;
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93 }
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94 }
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95 //END Templates
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96
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97 mixin (Vars!(TYPES)); // variable associative arrays
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98
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99 // Load content values from mergetag file(s) conf/options.mt[tb]
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100 // Use HIGH_LOW priority to load all data, HIGH_ONLY for just user data
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101 void loadData (PRIORITY priority) {
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102 try {
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103 MTTagReader reader = confDir.makeMTTagReader ("options", priority);
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104 bool isSecTag;
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105 while (reader.readTag (isSecTag) && !isSecTag) {} // skip header
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106 char[] symBuf = new char[64];
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107 size_t sym2, symEnd; // start of second symbol in symBuf, end of symbol
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108 do {
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109 //debug logger.trace ("tag: <{}|{}={}> sec: {} ({})", reader.tagType, reader.tagID, reader.tagData, reader.section, isSecTag);
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110 if (isSecTag) {
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111 sym2 = reader.section.length;
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112 if (sym2 > 0) { // named section; prefix symbol by "section."
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113 if (symBuf.length <= sym2)
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114 symBuf.length = sym2 * 2;
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115 symBuf[0..sym2] = reader.section;
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116 symBuf[sym2++] = '.';
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117 }
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118 } else {
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119 symEnd = reader.tagID.length;
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120 if (symBuf.length - sym2 < symEnd)
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121 symBuf.length = symBuf.length + symEnd * 2;
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122 symEnd += sym2;
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123 symBuf[sym2..symEnd] = reader.tagID;
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124 mixin (readTagMixin!(TYPES).readTagMixin);
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125 }
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126 } while (reader.readTag (isSecTag))
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127 } catch (NoFileException e) {
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128 // Just return. Options file will be created on exit.
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129 } catch (Exception e) {
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130 logger.warn ("Loading options failed: "~e.msg);
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131 logger.warn ("If warning persists, delete the offending file.");
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132 }
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133 }
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134
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135 // Save stored values to the user file
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136 void saveData () {
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137 try {
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138 MTTagWriter writer = confDir.makeMTTagWriter ("options.mtt");
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139
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140 // First sort tags by section:
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141 struct MTTagStrings {
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142 char[] type, id, data;
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143 }
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144 MTTagStrings[][char[]] secs;
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145 char[] typeStr;
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146 mixin (writeTagMixin!(TYPES));
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147
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148 // Now write sections:
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149 foreach (secName,sec; secs) {
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150 writer.sectionTag (secName);
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151 foreach (tag; sec)
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152 writer.dataTag (tag.type, tag.id, tag.data);
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153 }
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154 writer.close;
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155 } catch (Exception e) {
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156 logger.error ("Saving options failed: "~e.msg);
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157 }
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158 }
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159 }