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annotate mde/content/Content.d @ 163:24d77c52243f

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Provided sensible conversions for setting the value of one AStringContent from another, along with unittest. Updated layout and Translation unittests to run.
author Diggory Hardy <diggory.hardy@gmail.com>
date Sat, 23 May 2009 15:47:32 +0200
parents 2476790223b8
children bb2f1a76346d
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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 /******************************************************************************
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17 * The content system − interfaces and base Content class.
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18 *****************************************************************************/
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19 module mde.content.Content;
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20
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21 public import mde.content.IContent;
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22 import mde.content.Translation; // loading strings
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23 import mde.content.ValueCache; // saving/loading content values
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24 import util = mde.util; // fp -> dlg
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25 import mde.exception;
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26 import mde.setup.logger;
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27
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28 import tango.util.log.Log : Log, Logger;
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29 private Logger logger;
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30 static this () {
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31 logger = Log.getLogger ("mde.gui.content.Content");
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32 }
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33
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34 /** Content lists. Impemented by EnumContent as well as ContentList. */
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35 interface IContentList : IContent
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36 {
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37 /** Return all sub-contents. */
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38 Content[] list ();
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39
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40 /** Append x to the content list.
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41 *
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42 * Done automatically in creation, from symbol name, so don't call
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43 * externally. */
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44 void append (Content x);
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45 }
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46
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47
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48 /******************************************************************************
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49 * The base for most or all content classes.
105
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50 *
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51 * Includes generic callback support, toString implementation and symbol access.
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52 *
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53 * Derived classes should impement:
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54 * ---
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55 * this (char[] symbol, T val = /+ default value +/);
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56 * void opAssign (T val); // assign val, calling callbacks
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57 * T opCall (); // return value
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58 * alias opCall opCast;
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59 * void endEvent (); // extend to set new value in changed (if Content has a value)
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60 * ---
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61 *****************************************************************************/
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62 class Content : IContent
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63 {
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64 protected this (char[] symbol) {
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65 //debug logger.trace ("Creating a {}: {}", this, symbol);
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66 if (symbol in allContent)
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67 throw new ContentException ("Multiple content with symbol "~ symbol);
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68 allContent[symbol] = this;
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69 this.symbol = symbol;
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70
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71 // Name:
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72 auto l10nP = symbol in translations;
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73 if (l10nP)
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74 name (*l10nP);
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75 else
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76 name_ = symbol; // provide a temporary name
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77
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78 // Add to a parent list:
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79 ptrdiff_t i = symbol.length-1;
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80 while (i >= 0 && symbol[i] != '.')
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81 --i;
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82 IContentList parent;
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83 if (i <= 0) {
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84 if (symbol.length == 0)
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85 return; // special case: is tree (content tree root)
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86 parent = tree; // otherwise, use tree as root
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87 } else {
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88 char[] parentSym = symbol[0..i];
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89 Content* parObj = parentSym in allContent;
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90 if (parObj) { // existing object
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91 parent = cast(IContentList) *parObj;
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92 if (parent is null) { // it's not an IContentList!
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93 logger.warn ("{} is not an IContentList, but a child, {}, exists!", parentSym, symbol);
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94 return;
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95 }
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96 } else // no existing object
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97 parent = new ContentList (parentSym);
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98 }
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99 parent.append (this);
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100 }
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101
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102 void name (Translation.Entry e) {
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103 name_ = e.name;
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104 desc_ = e.desc;
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105 }
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106
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107 /** Add a callback. Callbacks are called on a change or event, in the order
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108 * added. */
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109 Content addCallback (void delegate (Content) cb) {
110
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110 this.cb ~= cb;
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111 return this;
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112 }
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113 /// ditto
115
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114 Content addCallback (void function (Content) cb) {
110
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115 this.cb ~= util.toDg (cb);
105
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116 return this;
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117 }
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118
137
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119 /** End of an event, e.g. a button release or end of an edit (calls callbacks).
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120 *
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121 * Content holding a value should override this, setting its new value in
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122 * changed as well as calling callbacks, e.g.:
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123 * ---
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124 * Content.changed.boolData[symbol] = val;
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125 * super();
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126 * --- */
105
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127 void endEvent () {
110
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128 foreach (dg; cb)
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129 dg (this);
105
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130 }
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131
162
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132 override char[] toString (uint i) {
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133 return i == 0 ? "No value"
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134 : i == 1 ? name_
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135 : i == 2 ? desc_
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136 : null;
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137 }
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138
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139 /** A naive implementation which assumes the passed content is
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140 * incompatible. */
163
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141 override bool set (IContent) {
162
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142 return false;
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143 }
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144
105
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145 protected:
137
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146 char[] symbol;
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147 char[] name_, desc_; // translated name and description
115
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148 void delegate (Content) cb[];
137
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149
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150 public static:
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151 /** Get Content with _symbol name symbol from the list of all content, or
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152 * null if no such Content exists. */
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153 Content get (char[] symbol) {
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154 auto p = symbol in allContent;
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155 if (p)
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156 return *p;
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157 logger.warn ("Content {} does not exist",symbol);
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158 return null;
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159 }
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160
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161 // Would use tango.container.HashMap, but mde.workaround2371 doesn't work here.
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162 Content[char[]] allContent; // all content hashed by symbol name
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163 ContentList tree; // tree of all content.
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164
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165 static this () {
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166 tree = new ContentList ("");
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167 }
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168
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169 package static:
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170 // Kept to set the value of other content as it is created:
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171 ValueCache loaded; // loaded values not matching any content created yet
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172 // The values in changed are what is written to file when saving:
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173 ValueCache changed; // changed values and values from local config file
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174
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175 Translation.Entry[char[]] translations;
105
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176 }
137
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177
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178 /** A generic way to handle a list of type IContent. */
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179 class ContentList : Content, IContentList
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180 {
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181 this (char[] symbol) {
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182 super (symbol);
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183 }
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184
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185 override Content[] list () {
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186 return list_;
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187 }
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188
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189 override void append (Content x) {
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190 list_ ~= x;
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191 }
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192
163
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diff changeset
193 override bool set (IContent c) {
162
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194 IContentList cl = cast (IContentList) c;
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195 if (cl !is null) {
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196 list_ = cl.list();
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197 return true;
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198 }
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diff changeset
199 return false;
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200 }
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201
137
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202 protected:
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203 final Content[] list_;
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204 }
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205
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206 /** Created on errors to display and log a message. */
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207 class ErrorContent : Content
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208 {
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diff changeset
209 this (char[] symbol, char[] msg) {
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diff changeset
210 super (symbol);
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diff changeset
211 this.msg = msg;
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diff changeset
212 logger.error (symbol ~ ": " ~ msg);
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213 }
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214
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215 override char[] toString (uint i) {
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diff changeset
216 return i == 0 ? msg
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217 : i == 1 ? name_
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218 : null;
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219 }
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220
9f035cd139c6 BIG commit. Major change: old Options class is gone, all content values are loaded and saved automatically. All options updated to reflect this, some changed.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 126
diff changeset
221 protected:
9f035cd139c6 BIG commit. Major change: old Options class is gone, all content values are loaded and saved automatically. All options updated to reflect this, some changed.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 126
diff changeset
222 char[] msg;
9f035cd139c6 BIG commit. Major change: old Options class is gone, all content values are loaded and saved automatically. All options updated to reflect this, some changed.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 126
diff changeset
223 }