[FEATURE] provide option to keep trailing spaces for CSV files

Author: SeeSharpSoft

src/main/java/net/seesharpsoft/intellij/plugins/csv/settings/CsvEditorSettings.java

@@ -56,6 +56,7 @@ public static final class OptionSet {
         public boolean FILE_END_LINE_BREAK;
         public CsvEscapeCharacter DEFAULT_ESCAPE_CHARACTER = ESCAPE_CHARACTER_DEFAULT;
         public CsvValueSeparator DEFAULT_VALUE_SEPARATOR = VALUE_SEPARATOR_DEFAULT;
+        public boolean KEEP_TRAILING_SPACES = false;
 
         public OptionSet() {
             EditorSettingsExternalizable editorSettingsExternalizable = EditorSettingsExternalizable.getInstance();
@@ -260,4 +261,12 @@ public void setDefaultValueSeparator(CsvValueSeparator defaultValueSeparator) {
     public CsvValueSeparator getDefaultValueSeparator() {
         return getState().DEFAULT_VALUE_SEPARATOR;
     }
+
+    public void setKeepTrailingSpaces(boolean keepTrailingSpaces) {
+        getState().KEEP_TRAILING_SPACES = keepTrailingSpaces;
+    }
+
+    public boolean getKeepTrailingSpaces() {
+        return getState().KEEP_TRAILING_SPACES;
+    }
 }

src/main/java/net/seesharpsoft/intellij/plugins/csv/settings/CsvEditorSettingsProvider.form

@@ -21,7 +21,7 @@
         <properties/>
         <border type="line" title="Text Editor"/>
         <children>
-          <grid id="d2422" layout-manager="GridLayoutManager" row-count="3" column-count="1" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
+          <grid id="d2422" layout-manager="GridLayoutManager" row-count="4" column-count="1" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
             <margin top="10" left="10" bottom="10" right="10"/>
             <constraints>
               <grid row="0" column="0" row-span="1" col-span="1" vsize-policy="3" hsize-policy="3" anchor="0" fill="3" indent="0" use-parent-layout="false"/>
@@ -51,6 +51,14 @@
                 </constraints>
                 <properties/>
               </component>
+              <component id="8ed01" class="javax.swing.JCheckBox" binding="cbKeepTrailingWhitespaces">
+                <constraints>
+                  <grid row="3" column="0" row-span="1" col-span="1" vsize-policy="0" hsize-policy="3" anchor="8" fill="0" indent="0" use-parent-layout="false"/>
+                </constraints>
+                <properties>
+                  <text value="Keep trailing white spaces (if unchecked, general editor setting is applied)"/>
+                </properties>
+              </component>
             </children>
           </grid>
           <grid id="6ba47" layout-manager="GridLayoutManager" row-count="2" column-count="2" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">

src/main/java/net/seesharpsoft/intellij/plugins/csv/settings/CsvEditorSettingsProvider.java

@@ -41,6 +41,7 @@ public class CsvEditorSettingsProvider implements SearchableConfigurable {
     private JCheckBox cbAdjustColumnWidthOnOpen;
     private JComboBox comboEscapeCharacter;
     private JComboBox comboValueSeparator;
+    private JCheckBox cbKeepTrailingWhitespaces;
 
     @NotNull
     @Override
@@ -90,7 +91,8 @@ public boolean isModified() {
                 !tfDefaultColumnWidth.getValue().equals(csvEditorSettings.getTableDefaultColumnWidth()) ||
                 isModified(cbAdjustColumnWidthOnOpen, csvEditorSettings.isTableAutoColumnWidthOnOpen()) ||
                 !Objects.equals(comboEscapeCharacter.getSelectedItem(), csvEditorSettings.getDefaultEscapeCharacter()) ||
-                !Objects.equals(comboValueSeparator.getSelectedItem(), csvEditorSettings.getDefaultValueSeparator());
+                !Objects.equals(comboValueSeparator.getSelectedItem(), csvEditorSettings.getDefaultValueSeparator()) ||
+                isModified(cbKeepTrailingWhitespaces, csvEditorSettings.getKeepTrailingSpaces());
     }
 
     @Override
@@ -114,6 +116,7 @@ public void reset() {
         cbAdjustColumnWidthOnOpen.setSelected(csvEditorSettings.isTableAutoColumnWidthOnOpen());
         comboEscapeCharacter.setSelectedItem(csvEditorSettings.getDefaultEscapeCharacter());
         comboValueSeparator.setSelectedItem(csvEditorSettings.getDefaultValueSeparator());
+        cbKeepTrailingWhitespaces.setSelected(csvEditorSettings.getKeepTrailingSpaces());
     }
 
     @Override
@@ -137,6 +140,7 @@ public void apply() throws ConfigurationException {
         csvEditorSettings.setTableAutoColumnWidthOnOpen(cbAdjustColumnWidthOnOpen.isSelected());
         csvEditorSettings.setDefaultEscapeCharacter((CsvEscapeCharacter)comboEscapeCharacter.getSelectedItem());
         csvEditorSettings.setDefaultValueSeparator((CsvValueSeparator)comboValueSeparator.getSelectedItem());
+        csvEditorSettings.setKeepTrailingSpaces(cbKeepTrailingWhitespaces.isSelected());
     }
 
     protected void createUIComponents() {

src/main/java/net/seesharpsoft/intellij/plugins/csv/settings/CsvStripTrailingSpacesFilterFactory.java

@@ -0,0 +1,28 @@
+package net.seesharpsoft.intellij.plugins.csv.settings;
+
+import com.intellij.openapi.editor.Document;
+import com.intellij.openapi.editor.StripTrailingSpacesFilter;
+import com.intellij.openapi.editor.StripTrailingSpacesFilterFactory;
+import com.intellij.openapi.fileEditor.FileDocumentManager;
+import com.intellij.openapi.fileTypes.LanguageFileType;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.vfs.VirtualFile;
+import net.seesharpsoft.intellij.plugins.csv.CsvLanguage;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class CsvStripTrailingSpacesFilterFactory extends StripTrailingSpacesFilterFactory {
+    @NotNull
+    @Override
+    public StripTrailingSpacesFilter createFilter(@Nullable Project project, @NotNull Document document) {
+        VirtualFile virtualFile = FileDocumentManager.getInstance().getFile(document);
+        if (project != null &&
+                virtualFile != null &&
+                virtualFile.getFileType() instanceof LanguageFileType &&
+                ((LanguageFileType) virtualFile.getFileType()).getLanguage().isKindOf(CsvLanguage.INSTANCE) &&
+                CsvEditorSettings.getInstance().getKeepTrailingSpaces()) {
+            return StripTrailingSpacesFilter.NOT_ALLOWED;
+        }
+        return StripTrailingSpacesFilter.ALL_LINES;
+    }
+}

src/main/resources/META-INF/plugin.xml

@@ -151,6 +151,8 @@ FIX: NullPointerException thrown when trying to view CSV as table #185
             <category>CSV</category>
             <descriptionDirectoryName>UnquoteAll</descriptionDirectoryName>
         </intentionAction>
+
+        <stripTrailingSpacesFilterFactory implementation="net.seesharpsoft.intellij.plugins.csv.settings.CsvStripTrailingSpacesFilterFactory" />
     </extensions>
 
     <actions>