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annotate mde/lookup/Options.d @ 63:66d555da083e

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Moved many modules/packages to better reflect usage.
author Diggory Hardy <diggory.hardy@gmail.com>
date Fri, 27 Jun 2008 18:35:33 +0100
parents mde/Options.d@960206198cbd
children cc3763817b8a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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
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6 of the GNU General Public License as published by the Free Software Foundation, either
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7 version 2 of the License, or (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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10 without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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11 See the GNU General Public License for more details.
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12
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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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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.lookup.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.setup.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.core.Exception : ArrayBoundsException;
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36 import tango.util.log.Log : Log, Logger;
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37
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38 /** Base class for handling options.
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39 *
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40 * This class itself handles no options and should not be instantiated, but provides a sub-classable
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41 * base for generic options handling. Also, the static portion of this class tracks sub-class
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42 * instances and provides loading and saving methods.
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43 *
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44 * Each sub-class provides named variables for maximal-speed reading. Local sub-class references
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45 * should be used for reading variables, and via the addOptionsClass() hook will be loaded from
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46 * files during pre-init (init0 stage). Do not write changes directly to the subclasses or they will
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47 * not be saved; use, for example, Options.setBool(...). Use an example like OptionsMisc as a
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48 * template for creating a new Options sub-class.
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49 *
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50 * Details: Options sub-classes hold associative arrays of pointers to all option variables, with a
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51 * char[] id. This list is used for saving, loading and to provide generic GUI options screens. The
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52 * built-in support in Options is only for bool, int and char[] types (a float type may get added).
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53 * Further to this, a generic class is used to store all options which have been changed, and if any
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54 * have been changed, is merged with options from the user conf dir and saved on exit.
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55 */
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56 class Options : IDataSection
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57 {
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58 // No actual options are stored by this class. However, much of the infrastructure is
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59 // present since it need not be redefined in sub-classes.
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60
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61 // The "pointer lists":
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62 protected bool* [ID] optsBool;
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63 protected int* [ID] optsInt;
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64 protected double*[ID] optsDouble;
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65 protected char[]*[ID] optsCharA;
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66
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67 //BEGIN Mergetag loading/saving code
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68 void addTag (char[] tp, ID id, char[] dt) {
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69 if (tp == "bool") {
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70 bool** p = id in optsBool;
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71 if (p !is null) **p = parseTo!(bool) (dt);
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72 } else if (tp == "char[]") {
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73 char[]** p = id in optsCharA;
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74 if (p !is null) **p = parseTo!(char[]) (dt);
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75 } else if (tp == "double") {
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76 double** p = id in optsDouble;
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77 if (p !is null) **p = parseTo!(double) (dt);
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78 } else if (tp == "int") {
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79 int** p = id in optsInt;
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80 if (p !is null) **p = parseTo!(int) (dt);
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81 }
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82 }
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83
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84 void writeAll (ItemDelg dlg) {
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85 foreach (ID id, bool* val; optsBool) dlg ("bool" , id, parseFrom!(bool ) (*val));
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86 foreach (ID id, char[]* val; optsCharA) dlg ("char[]", id, parseFrom!(char[]) (*val));
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87 foreach (ID id, double* val; optsDouble)dlg ("double", id, parseFrom!(double) (*val));
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88 foreach (ID id, int* val; optsInt) dlg ("int" , id, parseFrom!(int ) (*val));
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89 }
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90 //END Mergetag loading/saving code
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91
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92 //BEGIN Static
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93 /** Add an options sub-class to the list for loading and saving.
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94 *
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95 * Call from static this() (before Init calls load()). */
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96 static void addOptionsClass (Options c, char[] i)
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97 in { // Trap a couple of potential coding errors:
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98 assert (c !is null); // Instance must be created before calling addOptionsClass
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99 assert (((cast(ID) i) in subClasses) is null); // Don't allow a silent replacement
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100 } body {
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101 subClasses[cast(ID) i] = c;
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102 subClassChanges[cast(ID) i] = new OptionsGeneric;
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103 }
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104
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105 /** Set option symbol of Options class subClass to val.
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106 *
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107 * Due to the way options are handled generically, string IDs must be used to access the options
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108 * via hash-maps, which is a little slower than direct access but necessary since the option
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109 * must be changed in two separate places. */
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110 private static const ERR_MSG = "Options.setXXX called with incorrect parameters!";
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111 static void setBool (char[] subClass, char[] symbol, bool val) {
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112 changed = true; // something got set (don't bother checking this isn't what it already was)
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113
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114 try {
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115 *(subClasses[cast(ID) subClass].optsBool[cast(ID) symbol]) = val;
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116 subClassChanges[cast(ID) subClass].setBool (cast(ID) symbol, val);
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117 } catch (ArrayBoundsException) {
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118 // log and ignore:
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119 logger.error (ERR_MSG);
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120 }
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121 }
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122 static void setInt (char[] subClass, char[] symbol, int val) {
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123 changed = true; // something got set (don't bother checking this isn't what it already was)
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124
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125 try {
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126 *(subClasses[cast(ID) subClass].optsInt[cast(ID) symbol]) = val;
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127 subClassChanges[cast(ID) subClass].setInt (cast(ID) symbol, val);
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128 } catch (ArrayBoundsException) {
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129 // log and ignore:
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130 logger.error (ERR_MSG);
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131 }
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132 }
36
57d000574d75 Enabled drawing on demand, and made the polling interval configurable.
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diff changeset
133 static void setDouble (char[] subClass, char[] symbol, double val) {
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134 changed = true; // something got set (don't bother checking this isn't what it already was)
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135
57d000574d75 Enabled drawing on demand, and made the polling interval configurable.
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diff changeset
136 try {
57d000574d75 Enabled drawing on demand, and made the polling interval configurable.
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137 *(subClasses[cast(ID) subClass].optsDouble[cast(ID) symbol]) = val;
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138 subClassChanges[cast(ID) subClass].setDouble (cast(ID) symbol, val);
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139 } catch (ArrayBoundsException) {
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140 // log and ignore:
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diff changeset
141 logger.error (ERR_MSG);
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142 }
57d000574d75 Enabled drawing on demand, and made the polling interval configurable.
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143 }
32
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144 static void setCharA (char[] subClass, char[] symbol, char[] val) {
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145 changed = true; // something got set (don't bother checking this isn't what it already was)
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146
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147 try {
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148 *(subClasses[cast(ID) subClass].optsCharA[cast(ID) symbol]) = val;
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149 subClassChanges[cast(ID) subClass].setCharA (cast(ID) symbol, val);
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150 } catch (ArrayBoundsException) {
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151 // log and ignore:
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152 logger.error (ERR_MSG);
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153 }
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154 }
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155
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156 // Track all sections for saving/loading/other generic handling.
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157 static Options[ID] subClasses;
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158 static OptionsGeneric[ID] subClassChanges;
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159 static bool changed = false; // any changes at all, i.e. do we need to save?
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160
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161 /* Load/save options from file.
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162 *
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163 * If the file doesn't exist, no reading is attempted (options are left at default values).
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164 */
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165 private static const fileName = "options";
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166 private static const MT_LOAD_EXC = "Loading options aborted:";
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167 static void load () {
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168 // Check it exists (if not it should still be created on exit).
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169 // Don't bother checking it's not a folder, because it could still be a block or something.
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170 if (!confDir.exists (fileName)) return;
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171
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172 try {
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173 IReader reader;
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174 reader = confDir.makeMTReader (fileName, PRIORITY.LOW_HIGH);
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175 reader.dataSecCreator = delegate IDataSection(ID id) {
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176 /* Recognise each defined section, and return null for unrecognised sections. */
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177 Options* p = id in subClasses;
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178 if (p !is null) return *p;
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179 else return null;
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180 };
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181 reader.read;
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182 } catch (MTException e) {
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183 logger.fatal (MT_LOAD_EXC);
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184 logger.fatal (e.msg);
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185 throw new optionsLoadException ("Mergetag exception (see above message)");
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186 }
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187 }
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188 static void save () {
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189 if (!changed) return; // no changes to save
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190
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191 DataSet ds = new DataSet();
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192 foreach (id, sec; subClassChanges) ds.sec[id] = sec;
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193
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194 // Read locally-stored options
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195 try {
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196 IReader reader;
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197 reader = confDir.makeMTReader (fileName, PRIORITY.HIGH_ONLY, ds);
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198 reader.dataSecCreator = delegate IDataSection(ID id) {
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199 return null; // All recognised sections are already in the dataset.
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200 };
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201 reader.read;
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202 } catch (MTFileIOException) {
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203 // File either didn't exist or couldn't be opened.
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204 // Presuming the former, this is not a problem.
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205 } catch (MTException e) {
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206 // Log a message and continue, overwriting the file:
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207 logger.error (MT_LOAD_EXC);
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208 logger.error (e.msg);
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209 }
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210
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211 try {
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212 IWriter writer;
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213 writer = confDir.makeMTWriter (fileName, ds);
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214 writer.write();
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215 } catch (MTException e) {
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216 logger.error ("Saving options aborted! Reason:");
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217 logger.error (e.msg);
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218 }
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219 }
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220
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221 private static Logger logger;
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222 static this() {
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223 logger = Log.getLogger ("mde.options");
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224 }
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225 //END Static
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226
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227 //BEGIN Templates
50
f68ae1d667f9 Options: impl template & new OptionsFont class.
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228 private {
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229 // Return index of first comma, or halts if not found.
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230 template cIndex(char[] A) {
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diff changeset
231 static if (A.length == 0)
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diff changeset
232 static assert (false, "Error in implementation");
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233 else static if (A[0] == ',')
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diff changeset
234 const size_t cIndex = 0;
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
235 else
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
236 const size_t cIndex = 1 + cIndex!(A[1..$]);
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
237 }
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diff changeset
238 // Return index of first semi-colon, or halts if not found.
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diff changeset
239 template scIndex(char[] A) {
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diff changeset
240 static if (A.length == 0)
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diff changeset
241 static assert (false, "Error: no trailing semi-colon");
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diff changeset
242 else static if (A[0] == ';')
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diff changeset
243 const size_t scIndex = 0;
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diff changeset
244 else
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
245 const size_t scIndex = 1 + scIndex!(A[1..$]);
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diff changeset
246 }
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
247 // Look for "type symbols;" in A and return symbols as a comma separated list of names
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diff changeset
248 // (even if type is encountered more than once). Output may contain spaces and, if
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diff changeset
249 // non-empty, will contain a trailing comma. Assumes scIndex always returns less than A.$.
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
250 template parseT(char[] type, char[] A) {
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diff changeset
251 static if (A.length < type.length + 1) // end of input, no match
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diff changeset
252 const char[] parseT = "";
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diff changeset
253 else static if (A[0] == ' ') // leading whitespace: skip
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diff changeset
254 const char[] parseT = parseT!(type, A[1..$]);
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diff changeset
255 else static if (A[0..type.length] == type && A[type.length] == ' ') // match
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
256 const char[] parseT = A[type.length+1 .. scIndex!(A)] ~ "," ~
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
257 parseT!(type, A[scIndex!(A)+1 .. $]);
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diff changeset
258 else // no match
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diff changeset
259 const char[] parseT = parseT!(type, A[scIndex!(A)+1 .. $]);
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diff changeset
260 }
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261 // May have a trailing comma. Assumes cIndex always returns less than A.$.
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262 template aaVars(char[] A) {
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263 static if (A.length == 0)
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264 const char[] aaVars = "";
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265 else static if (A[0] == ' ')
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266 const char[] aaVars = aaVars!(A[1..$]);
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267 else
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268 const char[] aaVars = "\""~A[0..cIndex!(A)]~"\"[]:&"~A[0..cIndex!(A)] ~ "," ~
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269 aaVars!(A[cIndex!(A)+1..$]);
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270 }
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271 // strip Trailing Comma
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272 template sTC(char[] A) {
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273 static if (A.length && A[$-1] == ',')
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274 const char[] sTC = A[0..$-1];
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275 else
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276 const char[] sTC = A;
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277 }
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278 // if string is empty (other than space) return null, otherwise enclose: [A]
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279 template listOrNull(char[] A) {
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280 static if (A.length == 0)
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281 const char[] listOrNull = "null";
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282 else static if (A[0] == ' ')
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283 const char[] listOrNull = listOrNull!(A[1..$]);
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284 else
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285 const char[] listOrNull = "["~A~"]";
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286 }
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287 } protected {
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288 /** Produces the implementation code to go in the constuctor. */
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289 template aaDefs(char[] A) {
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290 const char[] aaDefs =
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291 "optsBool = " ~ listOrNull!(sTC!(aaVars!(parseT!("bool" , A)))) ~ ";\n" ~
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292 "optsInt = " ~ listOrNull!(sTC!(aaVars!(parseT!("int" , A)))) ~ ";\n" ~
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293 "optsDouble = "~ listOrNull!(sTC!(aaVars!(parseT!("double", A)))) ~ ";\n" ~
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294 "optsCharA = " ~ listOrNull!(sTC!(aaVars!(parseT!("char[]", A)))) ~ ";\n";
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295 }
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296 /+/** Produces the implementation code to go in the static constuctor. */
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297 template optClassAdd(char[] symb) {
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298 const char[] optClassAdd = symb ~ "=new "~classinfo(this).name~";\n";//Options.addOptionsClass("~symb~", );\n";
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299 }+/
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300 /** mixin impl("type symbol[, symbol[...]];[type symbol[...];][...]")
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301 *
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960206198cbd Documentation changes only. (Idea for new gui.content.Items module; unused gl.texture module commented out.)
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302 * Where type is one of bool, int, double, char[]. E.g.
50
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303 * ---
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304 * mixin (impl ("bool a, b; int i;"));
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305 * ---
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306 *
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307 * In case this() needs to be customized, mixin(impl!(A)) is equivalent to:
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308 * ---
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309 * mixin (A~"\nthis(){\n"~aaDefs!(A)~"}");
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310 * ---
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311 *
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312 * Notes: Only use space as whitespace (no new-lines or tabs). Make sure to add a trailing
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313 * semi-colon (;) or you'll get told off! :D
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314 *
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315 * In general errors aren't reported well. Trial with pragma (msg, impl!(...)); if
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316 * necessary.
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317 *
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318 * Extending: mixins could also be used for the static this() {...} or even the whole
62
960206198cbd Documentation changes only. (Idea for new gui.content.Items module; unused gl.texture module commented out.)
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319 * class, but doing so would rather decrease readability of any implementation. */
50
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320 template impl(char[] A /+, char[] symb+/) {
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321 const char[] impl = A~"\nthis(){\n"~aaDefs!(A)~"}";
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322 // ~"\nstatic this(){\n"~optClassAdd!(symb)~"}"
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diff changeset
323 }
36
57d000574d75 Enabled drawing on demand, and made the polling interval configurable.
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diff changeset
324 }
50
f68ae1d667f9 Options: impl template & new OptionsFont class.
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325 /+/** mixin impl("type symbol[, symbol[...]];[type symbol[...];][...]")
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diff changeset
326 *
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327 * E.g.
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328 * ---
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329 * mixin (impl ("bool a, b; int i;"));
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330 * ---
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331 * The parser isn't highly accurate. */
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diff changeset
332 // Try using templates instead? See std.metastrings
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diff changeset
333 static char[] impl (char[] A) {
f68ae1d667f9 Options: impl template & new OptionsFont class.
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334 char[] bools;
f68ae1d667f9 Options: impl template & new OptionsFont class.
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335 char[] ints;
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diff changeset
336
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diff changeset
337 while (A.length) {
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diff changeset
338 // Trim whitespace
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diff changeset
339 {
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diff changeset
340 size_t i = 0;
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diff changeset
341 while (i < A.length && (A[i] == ' ' || (A[i] >= 9u && A[i] <= 0xD)))
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
342 ++i;
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
343 A = A[i..$];
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
344 }
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
345 if (A.length == 0) break;
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
346
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diff changeset
347 char[] type;
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diff changeset
348 for (size_t i = 0; i < A.length; ++i) {
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diff changeset
349 if (A[i] == ' ' || (A[i] >= 9u && A[i] <= 0xD)) {
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
350 type = A[0..i];
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
351 A = A[i+1..$];
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
352 break;
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
353 }
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
354 }
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
355
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diff changeset
356 char[] symbols;
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diff changeset
357 for (size_t i = 0; i < A.length; ++i) {
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diff changeset
358 if (A[i] == ';') {
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
359 symbols = A[0..i];
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
360 A = A[i+1..$];
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
361 break;
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
362 }
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
363 }
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
364
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
365 if (type == "bool") {
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
366 if (bools.length)
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diff changeset
367 bools = bools ~ "," ~ symbols;
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diff changeset
368 else
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diff changeset
369 bools = symbols;
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diff changeset
370 }
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
371 else if (type == "int") {
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
372 if (ints.length)
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diff changeset
373 ints = ints ~ "," ~ symbols;
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diff changeset
374 else
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diff changeset
375 ints = symbols;
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diff changeset
376 }
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
377 else {
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diff changeset
378 // Unfortunately, we cannot output non-const strings (even though func is compile-time)
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
379 // We also cannot use pragma(msg) because the message gets printed even if the code isn't run.
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diff changeset
380 //pragma(msg, "Warning: impl failed to parse whole input string");
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
381 // Cannot use Cout / logger either.
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diff changeset
382 break;
f68ae1d667f9 Options: impl template & new OptionsFont class.
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parents: 43
diff changeset
383 }
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
384 }
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
385
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diff changeset
386 char[] ret;
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diff changeset
387 if (bools.length)
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diff changeset
388 ret = "bool "~bools~";\n";
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
389 if (ints.length)
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
390 ret = ret ~ "int "~ints~";\n";
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
391
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
392
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
393
f68ae1d667f9 Options: impl template & new OptionsFont class.
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diff changeset
394 return ret;
f68ae1d667f9 Options: impl template & new OptionsFont class.
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parents: 43
diff changeset
395 }+/
32
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396 //END Templates
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397 }
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398
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399 /* Special class to store all locally changed options, whatever the section. */
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400 class OptionsGeneric : Options {
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401 // These store the actual values, but are never accessed directly except when initially added.
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402 // optsX store pointers to each item added along with the ID and are used for access.
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403 bool[] bools;
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404 int[] ints;
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405 double[] doubles;
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406 char[][] strings;
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407
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408 this () {}
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409
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410 void setBool (ID id, bool x) {
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411 bool** p = id in optsBool;
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412 if (p !is null) **p = x;
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413 else {
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414 bools ~= x;
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415 optsBool[id] = &bools[$-1];
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416 }
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417 }
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418 void setInt (ID id, int x) {
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419 int** p = id in optsInt;
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420 if (p !is null) **p = x;
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421 else {
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422 ints ~= x;
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423 optsInt[id] = &ints[$-1];
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424 }
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425 }
36
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426 void setDouble (ID id, double x) {
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427 double** p = id in optsDouble;
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428 if (p !is null) **p = x;
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429 else {
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430 doubles ~= x;
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431 optsDouble[id] = &doubles[$-1];
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432 }
57d000574d75 Enabled drawing on demand, and made the polling interval configurable.
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433 }
32
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434 void setCharA (ID id, char[] x) {
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435 char[]** p = id in optsCharA;
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436 if (p !is null) **p = x;
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437 else {
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438 strings ~= x;
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439 optsCharA[id] = &strings[$-1];
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440 }
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441 }
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442
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443 //BEGIN Mergetag loading/saving code
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444 // Reverse priority: only load symbols not currently existing
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445 void addTag (char[] tp, ID id, char[] dt) {
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446 if (tp == "bool") {
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447 if ((id in optsBool) is null) {
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448 bools ~= parseTo!(bool) (dt);
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449 optsBool[id] = &bools[$-1];
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450 }
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451 } else if (tp == "char[]") {
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452 if ((id in optsCharA) is null) {
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453 strings ~= parseTo!(char[]) (dt);
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454 optsCharA[id] = &strings[$-1];
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455 }
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456 char[]** p = id in optsCharA;
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457 if (p !is null) **p = parseTo!(char[]) (dt);
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458 } else if (tp == "int") {
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459 if ((id in optsInt) is null) {
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460 ints ~= parseTo!(int) (dt);
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461 optsInt[id] = &ints[$-1];
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462 }
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463 }
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464 }
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465 //END Mergetag loading/saving code
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466 }
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467
63
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468 /* NOTE: Options sub-classes are expected to use a template to ease inserting contents and
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469 * hide some of the "backend" functionality. Use impl as below, or read the documentation for impl.
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470 *
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471 * Each entry should have a Translation entry with humanized names and descriptions in
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472 * data/L10n/ClassName.mtt
32
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473 *
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474 * To create a new Options sub-class, just copy, paste and adjust.
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475 */
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476
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477 /** A home for all miscellaneous options, at least for now. */
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478 OptionsMisc miscOpts;
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479 class OptionsMisc : Options {
53
f000d6cd0f74 Changes to paths, command line arguments and font LCD rendering.
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diff changeset
480 mixin (impl!("bool useThreads, exitImmediately; int logOptions; double pollInterval; char[] L10n;"));
32
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481
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482 static this() {
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483 miscOpts = new OptionsMisc;
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484 Options.addOptionsClass (miscOpts, "misc");
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485 }
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486 }