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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2006 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.jface.preference.FileFieldEditor;
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14
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15 import dwtx.jface.preference.StringButtonFieldEditor;
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16 // import java.io.File;
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17
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18 import dwt.DWT;
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19 import dwt.widgets.Composite;
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20 import dwt.widgets.FileDialog;
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21 import dwtx.jface.resource.JFaceResources;
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22
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23 import dwt.dwthelper.utils;
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24 import tango.io.FilePath;
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25 import tango.io.FileSystem;
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26
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27 /**
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28 * A field editor for a file path type preference. A standard file
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29 * dialog appears when the user presses the change button.
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30 */
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31 public class FileFieldEditor : StringButtonFieldEditor {
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32
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33 /**
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34 * List of legal file extension suffixes, or <code>null</code>
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35 * for system defaults.
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36 */
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37 private String[] extensions = null;
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38
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39 /**
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40 * Indicates whether the path must be absolute;
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41 * <code>false</code> by default.
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42 */
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43 private bool enforceAbsolute = false;
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44
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45 /**
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46 * Creates a new file field editor
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47 */
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48 protected this() {
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49 }
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50
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51 /**
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52 * Creates a file field editor.
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53 *
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54 * @param name the name of the preference this field editor works on
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55 * @param labelText the label text of the field editor
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56 * @param parent the parent of the field editor's control
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57 */
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58 public this(String name, String labelText, Composite parent) {
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59 this(name, labelText, false, parent);
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60 }
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61
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62 /**
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63 * Creates a file field editor.
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64 *
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65 * @param name the name of the preference this field editor works on
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66 * @param labelText the label text of the field editor
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67 * @param enforceAbsolute <code>true</code> if the file path
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68 * must be absolute, and <code>false</code> otherwise
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69 * @param parent the parent of the field editor's control
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70 */
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71 public this(String name, String labelText,
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72 bool enforceAbsolute, Composite parent) {
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73 init(name, labelText);
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74 this.enforceAbsolute = enforceAbsolute;
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75 setErrorMessage(JFaceResources
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76 .getString("FileFieldEditor.errorMessage"));//$NON-NLS-1$
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77 setChangeButtonText(JFaceResources.getString("openBrowse"));//$NON-NLS-1$
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78 setValidateStrategy(VALIDATE_ON_FOCUS_LOST);
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79 createControl(parent);
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80 }
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81
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82 /* (non-Javadoc)
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83 * Method declared on StringButtonFieldEditor.
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84 * Opens the file chooser dialog and returns the selected file.
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85 */
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86 protected String changePressed() {
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87 auto f = new FilePath(getTextControl().getText());
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88 if (!f.exists()) {
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89 f = cast(FilePath)null;
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90 }
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91 auto d = getFile(f);
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92 if (d is null) {
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93 return null;
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94 }
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95
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96 return FileSystem.toAbsolute( d ).toString();
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97 }
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98
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99 /* (non-Javadoc)
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100 * Method declared on StringFieldEditor.
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101 * Checks whether the text input field specifies an existing file.
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102 */
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103 protected bool checkState() {
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104
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105 String msg = null;
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106
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107 String path = getTextControl().getText();
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108 if (path !is null) {
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109 path = path.trim();
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110 } else {
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111 path = "";//$NON-NLS-1$
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112 }
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113 if (path.length is 0) {
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114 if (!isEmptyStringAllowed()) {
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115 msg = getErrorMessage();
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116 }
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117 } else {
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118 auto file = new FilePath(path);
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119 if (/+file.isFile()+/ file.exists && !file.isFolder ) {
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120 if (enforceAbsolute && !file.isAbsolute()) {
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121 msg = JFaceResources
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122 .getString("FileFieldEditor.errorMessage2");//$NON-NLS-1$
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123 }
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124 } else {
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125 msg = getErrorMessage();
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126 }
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127 }
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128
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129 if (msg !is null) { // error
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130 showErrorMessage(msg);
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131 return false;
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132 }
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133
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134 // OK!
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135 clearErrorMessage();
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136 return true;
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137 }
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138
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139 /**
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140 * Helper to open the file chooser dialog.
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141 * @param startingDirectory the directory to open the dialog on.
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142 * @return File The File the user selected or <code>null</code> if they
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143 * do not.
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144 */
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145 private FilePath getFile(FilePath startingDirectory) {
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146
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147 FileDialog dialog = new FileDialog(getShell(), DWT.OPEN);
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148 if (startingDirectory !is null) {
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149 dialog.setFileName(startingDirectory.path());
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150 }
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151 if (extensions !is null) {
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152 dialog.setFilterExtensions(extensions);
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153 }
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154 String file = dialog.open();
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155 if (file !is null) {
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156 file = file.trim();
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157 if (file.length > 0) {
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158 return new FilePath(file);
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159 }
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160 }
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161
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162 return null;
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163 }
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164
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165 /**
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166 * Sets this file field editor's file extension filter.
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167 *
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168 * @param extensions a list of file extension, or <code>null</code>
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169 * to set the filter to the system's default value
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170 */
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171 public void setFileExtensions(String[] extensions) {
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172 this.extensions = extensions;
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173 }
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174 }
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