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annotate mde/options.d @ 18:56a42ec95024

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Changes to Init and logging. Moved an Init function; hence events now depends on Init rather than vice-versa. Paths and logging set up by Init's static this(). Logging location set at compile time. committer: Diggory Hardy <diggory.hardy@gmail.com>
author Diggory Hardy <diggory.hardy@gmail.com>
date Tue, 18 Mar 2008 17:51:52 +0000
parents 5f90774ea1ef
children a60cbb7359dd
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5f90774ea1ef Applied the GNU GPL v2 to mde.
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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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4
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5 This program is free software; you can redistribute it and/or modify it under the terms of
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6 the GNU General Public License, version 2, as published by the Free Software Foundation.
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7
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8 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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9 without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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10 See the GNU General Public License for more details.
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11
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12 You should have received a copy of the GNU General Public License along
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13 with this program; if not, write to the Free Software Foundation, Inc.,
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14 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */
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15
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16 /** This module handles stored options, currently all except input maps.
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17 *
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18 * The purpose of having all options centrally controlled is to allow generic handling by the GUI
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19 * and ease saving and loading of values. The Options class is only really designed around handling
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20 * small numbers of variables for now.
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21 */
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22 module mde.options;
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23
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24 import mde.exception;
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25
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26 import mde.mergetag.Reader;
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27 import mde.mergetag.Writer;
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28 import mde.mergetag.DataSet;
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29 import mde.mergetag.exception;
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30 import mde.resource.paths;
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31
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32 import tango.scrapple.text.convert.parseTo : parseTo;
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33 import tango.scrapple.text.convert.parseFrom : parseFrom;
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34
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35 import tango.util.log.Log : Log, Logger;
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36
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37 /** Base class for handling options. This class itself will handle no options and should not be
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38 * instantiated, but sub-classes handle options.
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39 *
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40 * Each sub-class provides named variables for maximal-speed reading & writing. Sub-class references
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41 * are stored by name, and will be available after pre-init has run (DO NOT access before this).
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42 *
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43 * The static class keeps track of all Options class instances for global loading and saving.
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44 *
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45 * Details: Options sub-classes hold associative arrays of pointers to all option variables, with a
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46 * char[] id. This list is used for saving, loading and to provide generic GUI options screens. The
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47 * built-in support in Options is only for bool, int and char[] types (a float type may get added).
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48 */
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49 class Options : IDataSection
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50 {
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51 // No actual options are stored by this class. However, much of the infrastructure is
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52 // present since it need not be redefined in sub-classes.
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53
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54 // The "pointer lists":
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55 protected bool* [ID] optsBool;
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56 protected char[]*[ID] optsCharA;
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57 protected int* [ID] optsInt;
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58
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59 //BEGIN Mergtag loading/saving code
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60 void addTag (char[] tp, ID id, char[] dt) {
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61 if (tp == "bool") {
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62 bool** p = id in optsBool;
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63 if (p !is null) **p = parseTo!(bool) (dt);
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64 } else if (tp == "char[]") {
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65 char[]** p = id in optsCharA;
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66 if (p !is null) **p = parseTo!(char[]) (dt);
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67 } else if (tp == "int") {
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68 int** p = id in optsInt;
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69 if (p !is null) **p = parseTo!(int) (dt);
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70 }
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71 }
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72 void writeAll (ItemDelg dlg) {
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73 foreach (ID id, bool* val; optsBool) dlg ("bool" , id, parseFrom!(bool ) (*val));
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74 foreach (ID id, char[]* val; optsCharA) dlg ("char[]", id, parseFrom!(char[]) (*val));
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75 foreach (ID id, int* val; optsInt) dlg ("int" , id, parseFrom!(int ) (*val));
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76 }
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77 //END Mergtag loading/saving code
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78
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79 //BEGIN Static
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80 // Each individual section
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81 static OptionsMisc misc;
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82
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83 /* Load/save options from file.
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84 *
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85 * If the file doesn't exist, no reading is attempted (options are left at default values).
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86 */
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87 private static const fileName = "options";
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88 static void load () {
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89 // Create all uncreated sections now, so that if we return early they are still created.
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90 if (misc is null) misc = new OptionsMisc;
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91
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92 // Check it exists (if not it should still be created on exit).
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93 // Don't bother checking it's not a folder, because it could still be a block or something.
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94 if (!confDir.exists (fileName)) return;
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95
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96 IReader reader;
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97 try {
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98 reader = confDir.makeMTReader (fileName, PRIORITY.LOW_HIGH);
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99 reader.dataSecCreator = delegate IDataSection(ID id) {
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100 /* Recognise each defined section, and return null for unrecognised sections. */
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101
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102 if (id == cast(ID) "misc") return misc;
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103 else return null;
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104 };
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105 reader.read;
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106 } catch (MTException e) {
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107 logger.error ("Mergetag exception occurred:");
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108 logger.error (e.msg);
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109 throw new optionsLoadException ("Loading aborted: mergetag exception");
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110 }
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111
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112 if (misc is null) throw new optionsLoadException ("Loading failed: section \"misc\" not found");
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113 }
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114 static void save () {
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115 DataSet ds = new DataSet();
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116 ds.sec[cast(ID) "misc"] = misc;
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117
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118 IWriter writer;
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119 try {
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120 writer = confDir.makeMTWriter (fileName, ds);
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121 writer.write();
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122 } catch (MTException e) {
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123 logger.error ("Mergetag exception occurred; saving aborted:");
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124 logger.error (e.msg);
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125 //FIXME: currently nothing done besides logging the error
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126 }
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127 }
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128
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129 private static Logger logger;
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130 static this() {
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131 logger = Log.getLogger ("mde.options");
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132 }
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133 //END Static
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134 }
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135
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136 /** A home for all miscellaneous options, at least for now. */
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137 class OptionsMisc : Options {
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138 bool useThreads; // set 0 to disable threading
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139 char[] L10n; // locale, e.g. en-GB
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140
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141 int logLevel; // tango logger level
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142
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143 this () {
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144 optsBool = ["useThreads":&useThreads];
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145 optsCharA = ["L10n":&L10n];
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146 optsInt = ["logLevel":&logLevel];
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147 }
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148 }