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annotate mde/file/paths.d @ 134:7ababdf97748

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Moved mde.setup.paths to mde.file.paths and paths.mdeReader to mde.file.mergetag.Reader.MTMultiReader.
author Diggory Hardy <diggory.hardy@gmail.com>
date Thu, 29 Jan 2009 14:59:45 +0000
parents mde/setup/paths.d@1b1e2297e2fc
children bc697a218716
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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5f90774ea1ef Applied the GNU GPL v2 to mde.
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1 /* LICENSE BLOCK
5f90774ea1ef Applied the GNU GPL v2 to mde.
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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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16 /** Resource paths module.
134
7ababdf97748 Moved mde.setup.paths to mde.file.paths and paths.mdeReader to mde.file.mergetag.Reader.MTMultiReader.
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17 *
7ababdf97748 Moved mde.setup.paths to mde.file.paths and paths.mdeReader to mde.file.mergetag.Reader.MTMultiReader.
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18 * Internally, most mde code using files doesn't use absolute paths but paths
7ababdf97748 Moved mde.setup.paths to mde.file.paths and paths.mdeReader to mde.file.mergetag.Reader.MTMultiReader.
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19 * relative to mde directory. Further, mergetag files are usually not read
7ababdf97748 Moved mde.setup.paths to mde.file.paths and paths.mdeReader to mde.file.mergetag.Reader.MTMultiReader.
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20 * just from one file, but are the result of merging multiple files from the
7ababdf97748 Moved mde.setup.paths to mde.file.paths and paths.mdeReader to mde.file.mergetag.Reader.MTMultiReader.
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21 * same relative paths in different directories, including the root data
7ababdf97748 Moved mde.setup.paths to mde.file.paths and paths.mdeReader to mde.file.mergetag.Reader.MTMultiReader.
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22 * directory, possibly a directory in /etc, a directory for files specific to
7ababdf97748 Moved mde.setup.paths to mde.file.paths and paths.mdeReader to mde.file.mergetag.Reader.MTMultiReader.
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23 * the user accont, and possibly other directories.
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24 *
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25 * This module transforms relative paths to absolute paths, allowing for
7ababdf97748 Moved mde.setup.paths to mde.file.paths and paths.mdeReader to mde.file.mergetag.Reader.MTMultiReader.
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26 * multiple files to be read and merged.
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27 *
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28 * The base paths from which relative files are read are slit into two groups:
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29 * data paths, and conf paths (usually the conf paths refer to a "conf"
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30 * directory within the data paths). */
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31 /* Implementation note:
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32 * All paths are stored internally as strings, rather than as an instance of FilePath/FilePath once
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33 * the FilePath has served its immediate purpose, since it's more convenient and creating new
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34 * FilePaths for adjusted paths should be no slower than mutating existing ones. */
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35 module mde.file.paths;
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37 import mde.exception;
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38 import mde.file.mergetag.Reader;
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39 import mde.file.mergetag.Writer;
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40 import mde.file.mergetag.DataSet;
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41 import mde.file.mergetag.exception;
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43 import tango.io.Console;
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44 import tango.io.FilePath;
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45 version (linux) {
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46 import tango.io.FileScan;
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47 import tango.util.container.SortedMap;
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48 import tango.sys.Environment;
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49 } else version (Windows)
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50 import tango.sys.win32.SpecialPath;
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51
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52 debug {
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53 import tango.util.log.Log : Log, Logger;
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54 private Logger logger;
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55 static this() {
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56 logger = Log.getLogger ("mde.file.paths");
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57 }
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58 }
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59
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60 /** Order to read files in.
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61 *
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62 * Values: HIGH_LOW, LOW_HIGH, HIGH_ONLY. */
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63 enum PRIORITY : byte { HIGH_LOW, LOW_HIGH, HIGH_ONLY }
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64
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65 /** This struct has one instance for each "directory".
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66 *
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67 * It is the only item within this module that you should need to interact with.
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68 *
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69 * In the case of confDir, the user path is guaranteed to exist (as highest priority path). */
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70 struct mdeDirectory
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71 {
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72 /** Creates an MT reader for each file.
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73 *
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74 * Params:
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75 * file = The file path and name relative to the mdeDirectory, without a suffix
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76 * (e.g. "options")
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77 * readOrder = Read the highest priority or lowest priority files first? For correct merging,
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78 * this should be LOW_HIGH when newly-read items override old ones (as is the case
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79 * with DefaultData) and HIGH_LOW when the first-read items survive. Thus override
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80 * order needs to be the same for each section, except the header which is always
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81 * read with LOW_HIGH order.
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82 * Alternately, for files which shouldn't be
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83 * merged where only the highest priority file should be read, pass HIGH_ONLY.
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84 * ds = The dataset, as for mergetag. Note: all actual readers share one dataset.
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85 * rdHeader = Read the headers for each file and merge if rdHeader == true.
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86 */
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87 IReader makeMTReader (char[] file, PRIORITY readOrder, DataSet ds = null, bool rdHeader = false)
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88 {
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89 FilePath[] files = getFiles (file, readOrder);
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90 if (files is null)
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25cb7420dc91 A massive overhaul/rewrite for the gui's data management and setup code. Currently much that was working is broken.
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91 throw new NoFileException ("Unable to find the file: "~file~"[.mtt|mtb]");
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92
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93 return new MTMultiReader (files, ds, rdHeader);
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94 }
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95
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96 /** Creates an MT writer for file deciding on the best path to use.
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97 *
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98 * Params:
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99 * file = The file path and name relative to the mdeDirectory, without a suffix
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100 * (e.g. "options")
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101 * ds = The dataset, as for mergetag.
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102 */
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103 IWriter makeMTWriter (char[] file, DataSet ds = null)
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104 {
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105 // FIXME: use highest priority writable path
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106 return makeWriter (paths[pathsLen-1] ~ file, ds, WriterMethod.Text);
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107 }
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108
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109 /** Returns a string listing the file name or names (if readOrder is not HIGH_ONLY and multiple
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110 * matches are found), or "no file found". Intended for user output only. */
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111 char[] getFileName (char[] file, PRIORITY readOrder)
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112 {
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113 FilePath[] files = getFiles (file, readOrder);
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diff changeset
114 if (files is null)
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115 return "no file found";
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diff changeset
116
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diff changeset
117 char[] ret = files[0].toString;
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118 foreach (f; files[1..$])
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119 ret ~= ", " ~ f.toString;
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120 return ret;
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121 }
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122
53
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123 /// Print all paths found.
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124 static void printPaths () {
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125 Cout ("Data paths found:");
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126 dataDir.coutPaths;
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127 Cout ("\nConf paths found:");
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128 confDir.coutPaths;
101
71f0f1f83620 Some path adjustments for windows (untested) and fonts. All types of option can be edited.
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129 Cout ("\nLog file directory:\n\t")(logDir);
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130 version (Windows) {
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131 Cout ("\nFont directory:\n\t")(fontDir).newline;
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diff changeset
132 } else version (linux) {
106
7f7b40fed72b Fix & workaround for tango r4134.
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diff changeset
133 Cout ("\nFont files found:");
101
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134 foreach (f,p; fontFiles)
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135 Cout ("\n\t")(f)("\t")(p[0..$-1]);
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136 Cout.newline;
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137 }
53
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138 }
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139
15
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140 private:
67
108d123238c0 Changes to work with tango r3700 (post 0.99.6).
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141 FilePath[] getFiles (char[] filename, PRIORITY readOrder)
75
25cb7420dc91 A massive overhaul/rewrite for the gui's data management and setup code. Currently much that was working is broken.
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parents: 68
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142 {
67
108d123238c0 Changes to work with tango r3700 (post 0.99.6).
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diff changeset
143 FilePath[] ret;
68
3a737e06dc50 Unittests: fixes and changes. Plus some doc changes.
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diff changeset
144
47
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diff changeset
145 if (readOrder == PRIORITY.LOW_HIGH) {
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diff changeset
146 for (size_t i = 0; i < pathsLen; ++i) {
67
108d123238c0 Changes to work with tango r3700 (post 0.99.6).
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147 FilePath file = findFile (paths[i]~filename);
47
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diff changeset
148 if (file !is null)
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149 ret ~= file;
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150 }
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diff changeset
151 } else {
75
25cb7420dc91 A massive overhaul/rewrite for the gui's data management and setup code. Currently much that was working is broken.
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parents: 68
diff changeset
152 assert (readOrder == PRIORITY.HIGH_LOW ||
25cb7420dc91 A massive overhaul/rewrite for the gui's data management and setup code. Currently much that was working is broken.
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diff changeset
153 readOrder == PRIORITY.HIGH_ONLY );
25cb7420dc91 A massive overhaul/rewrite for the gui's data management and setup code. Currently much that was working is broken.
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diff changeset
154
47
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diff changeset
155 for (int i = pathsLen - 1; i >= 0; --i) {
67
108d123238c0 Changes to work with tango r3700 (post 0.99.6).
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diff changeset
156 FilePath file = findFile (paths[i]~filename);
78
79a1809421aa Widget data saving reimplemented for the new data system. (Now grid layout widgets remember their row & column sizes.)
Diggory Hardy <diggory.hardy@gmail.com>
parents: 75
diff changeset
157 if (file !is null)
47
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diff changeset
158 ret ~= file;
78
79a1809421aa Widget data saving reimplemented for the new data system. (Now grid layout widgets remember their row & column sizes.)
Diggory Hardy <diggory.hardy@gmail.com>
parents: 75
diff changeset
159 if (readOrder == PRIORITY.HIGH_ONLY) break;
47
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160 }
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diff changeset
161 }
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diff changeset
162 return ret;
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163 }
15
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164
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165 // Unconditionally add a path
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166 void addPath (char[] path) {
107
20f7d813bb0f Translation: now has a file for each locale, instead of a file for each section. Items updated; all strings translated.
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parents: 106
diff changeset
167 assert (pathsLen < MAX_PATHS);
15
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168 paths[pathsLen++] = path~'/';
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169 }
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170
18
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parents: 17
diff changeset
171 // Test a path and add if is a folder.
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parents: 17
diff changeset
172 bool tryPath (char[] path, bool create = false) {
107
20f7d813bb0f Translation: now has a file for each locale, instead of a file for each section. Items updated; all strings translated.
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diff changeset
173 assert (pathsLen < MAX_PATHS);
20f7d813bb0f Translation: now has a file for each locale, instead of a file for each section. Items updated; all strings translated.
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diff changeset
174 FilePath fp = FilePath (path);
18
56a42ec95024 Changes to Init and logging.
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parents: 17
diff changeset
175 if (fp.exists && fp.isFolder) {
15
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176 paths[pathsLen++] = path~'/';
18
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diff changeset
177 return true;
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parents: 17
diff changeset
178 } else if (create) {
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parents: 17
diff changeset
179 try {
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diff changeset
180 fp.create;
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parents: 17
diff changeset
181 paths[pathsLen++] = fp.toString~'/';
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diff changeset
182 return true;
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parents: 17
diff changeset
183 } catch (Exception e) {
28
b5fadd8d930b Small addition to GUI, paths work-around for Windows.
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parents: 27
diff changeset
184 // No logging avaiable yet: Use Stdout/Cout
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parents: 27
diff changeset
185 Cout ("Creating path "~path~" failed:" ~ e.msg).newline;
18
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diff changeset
186 }
15
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187 }
18
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diff changeset
188 return false;
15
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189 }
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parents:
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190
53
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diff changeset
191 void coutPaths () {
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diff changeset
192 if (pathsLen) {
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diff changeset
193 for (size_t i = 0; i < pathsLen; ++i)
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diff changeset
194 Cout ("\n\t" ~ paths[i]);
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parents: 47
diff changeset
195 } else
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diff changeset
196 Cout ("[none]");
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diff changeset
197 }
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diff changeset
198
15
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199 // Use a static array to store all possible paths with separate length counters.
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200 // Lowest priority paths are first.
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parents:
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201 char[][MAX_PATHS] paths;
4608be19ebe2 Use OS paths (linux only for now), merging multiple paths. Init changes regarding options.
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parents:
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202 ubyte pathsLen = 0;
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parents:
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203 }
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parents:
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204
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parents:
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205 /** These are the actual instances, one for each of the data and conf "directories". */
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parents:
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206 mdeDirectory dataDir, confDir;
101
71f0f1f83620 Some path adjustments for windows (untested) and fonts. All types of option can be edited.
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diff changeset
207 char[] logDir; /// Directory for log files
15
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208
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parents:
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209 //BEGIN Path resolution
107
20f7d813bb0f Translation: now has a file for each locale, instead of a file for each section. Items updated; all strings translated.
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parents: 106
diff changeset
210 /** Find at least one path for each required directory. */
20f7d813bb0f Translation: now has a file for each locale, instead of a file for each section. Items updated; all strings translated.
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parents: 106
diff changeset
211 debug (mdeUnitTest) {
20f7d813bb0f Translation: now has a file for each locale, instead of a file for each section. Items updated; all strings translated.
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parents: 106
diff changeset
212 /** In unittest mode, add paths unittest/data and unittest/conf before init runs. */
20f7d813bb0f Translation: now has a file for each locale, instead of a file for each section. Items updated; all strings translated.
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parents: 106
diff changeset
213 static this () {
20f7d813bb0f Translation: now has a file for each locale, instead of a file for each section. Items updated; all strings translated.
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parents: 106
diff changeset
214 dataDir.tryPath ("unittest/data");
20f7d813bb0f Translation: now has a file for each locale, instead of a file for each section. Items updated; all strings translated.
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parents: 106
diff changeset
215 confDir.tryPath ("unittest/conf");
20f7d813bb0f Translation: now has a file for each locale, instead of a file for each section. Items updated; all strings translated.
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parents: 106
diff changeset
216 if (!(dataDir.pathsLen && confDir.pathsLen))
20f7d813bb0f Translation: now has a file for each locale, instead of a file for each section. Items updated; all strings translated.
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parents: 106
diff changeset
217 throw new mdeException ("Fatal: unittest/data and unittest/conf don't both exist");
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parents: 106
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218 // Don't bother with real paths or logDir or font dir(s) for unittest.
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parents: 106
diff changeset
219 }
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parents: 106
diff changeset
220 }
15
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diff changeset
221 version (linux) {
101
71f0f1f83620 Some path adjustments for windows (untested) and fonts. All types of option can be edited.
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parents: 91
diff changeset
222 SortedMap!(char[],char[]) fontFiles; // key is file name, value is CString path
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diff changeset
223 /** Get the actual path of a font file, or throw NoFileException if not found.
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parents: 91
diff changeset
224 *
71f0f1f83620 Some path adjustments for windows (untested) and fonts. All types of option can be edited.
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parents: 91
diff changeset
225 * Returns a C string (null terminated). */
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parents: 91
diff changeset
226 char[] getFontPath (char[] file) {
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parents: 91
diff changeset
227 char[] ret;
71f0f1f83620 Some path adjustments for windows (untested) and fonts. All types of option can be edited.
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parents: 91
diff changeset
228 if (fontFiles.get (file, ret))
71f0f1f83620 Some path adjustments for windows (untested) and fonts. All types of option can be edited.
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parents: 91
diff changeset
229 return ret;
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parents: 91
diff changeset
230 throw new NoFileException ("Unable to find font file: "~file);
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parents: 91
diff changeset
231 }
71f0f1f83620 Some path adjustments for windows (untested) and fonts. All types of option can be edited.
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parents: 91
diff changeset
232
53
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diff changeset
233 // base-path not used on posix
101
71f0f1f83620 Some path adjustments for windows (untested) and fonts. All types of option can be edited.
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parents: 91
diff changeset
234 void resolvePaths (char[] base = "data") {
15
4608be19ebe2 Use OS paths (linux only for now), merging multiple paths. Init changes regarding options.
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parents:
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235 // Home directory:
53
f000d6cd0f74 Changes to paths, command line arguments and font LCD rendering.
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diff changeset
236 char[] HOME = Environment.get("HOME", ".");
15
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diff changeset
237
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parents:
diff changeset
238 // Base paths:
18
56a42ec95024 Changes to Init and logging.
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parents: 17
diff changeset
239 // Static data (must exist):
67
108d123238c0 Changes to work with tango r3700 (post 0.99.6).
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parents: 63
diff changeset
240 FilePath staticPath =
101
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241 findPath (false, "/usr/share/games/mde", "/usr/local/share/games/mde", base);
18
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242 // Config (can just use defaults if necessary, so long as we can save afterwards):
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243 FilePath userPath = findPath (true, HOME~"/.config/mde", HOME~"/.mde");
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244
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245 // Static data paths:
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246 dataDir.addPath (staticPath.toString); // we know this is valid anyway
107
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247 dataDir.tryPath (userPath.toString ~ "/data");
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248 if (extraDataPath) dataDir.tryPath (extraDataPath);
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249 if (!dataDir.pathsLen) throw new mdeException ("Fatal: no data path found!");
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250
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251 // Configuration paths:
107
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252 confDir.tryPath (staticPath.toString ~ "/conf");
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32eff0e01c05 Only locally-changed options are stored in user-config now. Log levels revised.
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253 confDir.tryPath ("/etc/mde");
107
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254 confDir.tryPath (userPath.toString ~ "/conf", true);
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255 if (extraConfPath) confDir.tryPath (extraConfPath);
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256 if (!confDir.pathsLen) throw new mdeException ("Fatal: no conf path found!");
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257
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258 // Logging path:
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259 logDir = userPath.toString;
101
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260
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261 // Font paths:
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262 auto fs = new FileScan;
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263 // Scan for directories containing truetype and type1 fonts:
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264 fs.sweep ("/usr/share/fonts", delegate bool(FilePath fp, bool isDir)
101
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265 { return isDir || fp.suffix == ".ttf" || fp.suffix == ".pfb"; },
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266 true);
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267 fontFiles = new SortedMap!(char[],char[]);
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268 foreach (fp; fs.files)
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269 fontFiles.add (fp.file, fp.cString); // both strings should be slices of same memory
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270 }
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271 } else version (Windows) {
101
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272 char[] fontDir;
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273 /** Get the actual path of a font file, or throw NoFileException if not found.
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274 *
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275 * Returns a C string (null terminated). */
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276 char[] getFontPath (char[] file) {
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277 FilePath path = new FilePath (fontDir~file);
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278 if (path.exists && !path.isFolder)
102
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279 return path.cString;
101
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280 throw new NoFileException ("Unable to find font file: "~file);
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281 }
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282
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283 void resolvePaths (char[] base = "./") {
101
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284 //FIXME: Get base path from registry
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285
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286 // Base paths:
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287 FilePath installPath = findPath (false, base);
101
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288 FilePath staticPath = findPath (false, installPath.toString);
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289 FilePath userPath = findPath (true, getSpecialPath(CSIDL_LOCAL_APPDATA) ~ "/mde");
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290
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291 // Static data paths:
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292 dataDir.addPath (staticPath.toString); // we know this is valid anyway
107
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293 dataDir.tryPath (userPath.toString ~ "/data");
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294 if (extraDataPath) dataDir.tryPath (extraDataPath);
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295 if (!dataDir.pathsLen) throw new mdeException ("Fatal: no data path found!");
28
b5fadd8d930b Small addition to GUI, paths work-around for Windows.
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296
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297 // Configuration paths:
107
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298 confDir.tryPath (staticPath.toString ~ "/conf");
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299 confDir.tryPath (installPath.append("user").toString);
107
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300 confDir.tryPath (userPath.toString ~ "/conf", true);
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301 if (extraConfPath) confDir.tryPath (extraConfPath);
18
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302 if (!confDir.pathsLen) throw new mdeException ("Fatal: no conf path found!");
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303
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304 // Logging path:
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305 logDir = userPath.toString;
101
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diff changeset
306
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307 // Font path:
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308 fontDir = getSpecialPath (CSIDL_FONTS) ~ "/"; // append separator
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309 }
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310 } else {
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311 static assert (false, "Platform is not linux or Windows: no support for paths on this platform yet!");
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312 }
18
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313
53
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314 /// For command line args: these paths are added if non-null, with highest priority.
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315 char[] extraDataPath, extraConfPath;
18
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316
53
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diff changeset
317 private {
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318 class PathException : mdeException {
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319 this(char[] msg) {
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diff changeset
320 super (msg);
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321 }
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322 }
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323
107
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324 // The maximum number of paths for any one "directory".
53
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325 const MAX_PATHS = 4;
134
7ababdf97748 Moved mde.setup.paths to mde.file.paths and paths.mdeReader to mde.file.mergetag.Reader.MTMultiReader.
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326 static assert (MTMultiReader.MAX_READERS == MAX_PATHS, "MAX_PATHS not all equal");
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327
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328 /* Try each path in succession, returning the first to exist and be a folder.
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329 * If none are valid and create is true, will try creating each in turn.
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330 * If still none are valid, throws. */
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331 FilePath findPath (bool create, char[][] paths ...) {
53
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332 FilePath[] fps;
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333 fps.length = paths.length;
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334 foreach (i,path; paths) {
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335 FilePath pv = new FilePath (path);
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336 if (pv.exists && pv.isFolder) return pv; // got a valid path
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337 fps[i] = pv;
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338 }
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339 if (create) { // try to create a folder, using each path in turn until succesful
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340 foreach (fp; fps) {
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341 try {
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342 return fp.create;
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343 }
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diff changeset
344 catch (Exception e) {}
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345 }
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346 }
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347 // no valid path...
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348 char[] msg = "Unable to find"~(create ? " or create" : "")~" a required path! The following were tried:";
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349 foreach (path; paths) msg ~= " \"" ~ path ~ '\"';
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350 throw new PathException (msg);
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351 }
134
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352 }
53
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353 //END Path resolution
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354
75
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355 /// Thrown when makeMTReader couldn't find a file.
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356 class NoFileException : MTFileIOException {
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357 this (char[] msg) {
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358 super(msg);
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359 }
53
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360 }