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annotate mde/content/ContentLoader.d @ 137:9f035cd139c6

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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. Content restrutured a lot: New IContent module, Content module includes more functionality. New ContentLoader module to manage content loading/saving/translation. Translation module moved to content dir and cut down to reflect current usage. File format unchanged except renames: FontOptions -> Font, VideoOptions -> Screen. Font render mode and LCD filter options are now enums. GUI loading needs to create content (and set type for enums), but doesn't save/load value. Some setup of mainSchedule moved to mde.mainLoop. Content callbacks are called on content change now. ContentLists are set up implicitly from content symbols. Not as fast but much easier! Bug-fix in the new MTTagReader. Renamed MT *Reader maker functions to avoid confusion in paths.d. New mde.setup.logger module to allow logger setup before any other module's static this().
author Diggory Hardy <diggory.hardy@gmail.com>
date Sat, 07 Feb 2009 12:46:03 +0000
parents
children 42fb97d9ff9e
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137
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.
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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
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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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8
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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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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 * ContentLoader handles saving and loading of all Content values, as
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18 * well as translation (loading Contents' name and desc strings from file).
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19 *
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20 * In other words, the values of Content classes automatically persist across
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21 * runs (provided save() and load() are called appropriately).
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22 * If content is created before calling load() its value is set by load(); if
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23 * it is created after, its value is set during its creation.
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24 *****************************************************************************/
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25 module mde.content.ContentLoader;
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26
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27 import mde.content.AStringContent;
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28 import mde.content.ValueCache;
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29 import mde.file.paths; // PRIORITY enum
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30 import mde.content.Translation;
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31
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32 debug {
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33 import tango.util.log.Log : Log, Logger;
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34 private Logger logger;
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35 static this () {
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36 logger = Log.getLogger ("mde.gui.content.ContentLoader");
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37 }
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38 }
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39
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40 /// Namespace for the module's functionality
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41 struct ContentLoader {
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42 private static { // Templates
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43 template ContentN(T) {
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44 static if (is(T == bool)) {
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45 const char[] ContentN = "BoolContent";
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46 } else static if (is(T == int)) {
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47 const char[] ContentN = "IntContent";
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48 } else static if (is(T == double)) {
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49 const char[] ContentN = "DoubleContent";
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50 } else static if (is(T == char[])) {
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51 const char[] ContentN = "StringContent";
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52 } else static if (is(T == enumVal)) {
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53 const char[] ContentN = "EnumContent";
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54 } else
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55 static assert (false, "No Content of type "~T.stringof);
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56 }
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57
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58 // For setting existing content; mixed in in Content.load().
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59 template setContentMixin(A...) {
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60 static if (A.length)
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61 const char[] setContentMixin =
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62 `foreach (id,val; `~ValueCache.TName!(A[0])~`Data) {
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63 auto contP = id in Content.allContent;
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64 if (contP) {
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65 `~ContentN!(A[0])~` cont = cast(`~ContentN!(A[0])~`) *contP;
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66 if (cont)
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67 cont.assignNoCng (val);
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68 }
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69 } ` ~ setContentMixin!(A[1..$]);
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70 else
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71 const char[] setContentMixin = ``;
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72 }
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73 }
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74 static:
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75 /** Loads all stored content, to an existing Content or a buffer where new
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76 * content can look up its value.
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77 *
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78 * This would normally include all options, except perhaps key bindings.
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79 *
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80 * Should only be called once. */
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81 void load () {
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82 Content.loaded.loadData (PRIORITY.HIGH_LOW);
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83 // Add locally-stored options into changes so they don't get lost when writing
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84 Content.changed.loadData (PRIORITY.HIGH_ONLY);
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85 with (Content.loaded) {
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86 mixin (setContentMixin!(ValueCache.TYPES));
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87 }
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88 }
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89
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90 /** Saves all changed content.
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91 *
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92 * May be called multiple times. */
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93 void save () {
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94 Content.changed.saveData;
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95 }
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96
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97 private:
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98 /* Load translations for all content.
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99 * Hooked as a change callback for l10n. */
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100 void translate (Content) {
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101 logger.info ("loading translations...");
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102 Translation trl = Translation.get (l10n());
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103
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104 // Translate existing content:
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105 foreach (symb, cont; Content.allContent) {
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106 auto p = symb in trl.entries;
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107 if (p)
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108 cont.name (*p);
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109 }
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110
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111 // Allow translation of new content:
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112 Content.translations = trl.entries;
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113 logger.info ("loaded translations");
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114 }
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115
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116 StringContent l10n;
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117 static this () {
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118 l10n = new StringContent ("MiscOptions.l10n");
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119 l10n.addCallback (&translate);
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120 }
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121 }