Fix #143

fastods/src/main/java/com/github/jferard/fastods/AnonymousOdsDocument.java

@@ -144,6 +144,11 @@ public void addAutofilter(final Table table, final int r1, final int c1, final i
         this.commonOdsDocument.addAutofilter(table, r1, c1, r2, c2);
     }
 
+    @Override
+    public void freezeCells(final Table table, final int rowCount, final int colCount) {
+        this.commonOdsDocument.freezeCells(table, rowCount, colCount);
+    }
+
     /**
      * Saves a file.
      * Do not close the writer (see https://github.com/jferard/fastods/issues/138)

fastods/src/main/java/com/github/jferard/fastods/CommonOdsDocument.java

@@ -159,4 +159,9 @@ public void addAutofilter(final Table table, final int r1, final int c1, final i
                               final int c2) {
         this.odsElements.addAutofilter(table, r1, c1, r2, c2);
     }
+
+    @Override
+    public void freezeCells(final Table table, final int rowCount, final int colCount) {
+        this.odsElements.freezeCells(table, rowCount, colCount);
+    }
 }

fastods/src/main/java/com/github/jferard/fastods/NamedOdsDocument.java

@@ -144,6 +144,11 @@ public void addAutofilter(final Table table, final int r1, final int c1, final i
         this.commonOdsDocument.addAutofilter(table, r1, c1, r2, c2);
     }
 
+    @Override
+    public void freezeCells(final Table table, final int rowCount, final int colCount) {
+        this.commonOdsDocument.freezeCells(table, rowCount, colCount);
+    }
+
     /**
      * Add a cell style for a given data type. Use only if you want to flush data before the end
      * of the document

fastods/src/main/java/com/github/jferard/fastods/OdsDocument.java

@@ -138,4 +138,6 @@ public interface OdsDocument {
      * @param c2 the right column
      */
     void addAutofilter(Table table, int r1, int c1, int r2, int c2);
+
+    void freezeCells(Table table, int rowCount, int colCount);
 }

fastods/src/main/java/com/github/jferard/fastods/TableBuilder.java

@@ -24,6 +24,7 @@
 package com.github.jferard.fastods;
 
 import com.github.jferard.fastods.datastyle.DataStyles;
+import com.github.jferard.fastods.odselement.OdsElements;
 import com.github.jferard.fastods.odselement.StylesContainer;
 import com.github.jferard.fastods.odselement.config.ConfigItem;
 import com.github.jferard.fastods.odselement.config.ConfigItemMapEntry;
@@ -98,8 +99,8 @@ public static TableBuilder create(final PositionUtil positionUtil, final WriteUt
         final ConfigItemMapEntrySet configEntry = ConfigItemMapEntrySet.createSet(name);
         configEntry.add(new ConfigItem("CursorPositionX", "int", "0"));
         configEntry.add(new ConfigItem("CursorPositionY", "int", "0"));
-        configEntry.add(new ConfigItem("HorizontalSplitMode", "short", "0"));
-        configEntry.add(new ConfigItem("VerticalSplitMode", "short", "0"));
+        configEntry.add(new ConfigItem("HorizontalSplitMode", "short", OdsElements.SC_SPLIT_NORMAL));
+        configEntry.add(new ConfigItem("VerticalSplitMode", "short", OdsElements.SC_SPLIT_NORMAL));
         configEntry.add(new ConfigItem("HorizontalSplitPosition", "int", "0"));
         configEntry.add(new ConfigItem("VerticalSplitPosition", "int", "0"));
         configEntry.add(new ConfigItem("ActiveSplitRange", "short", "2"));

fastods/src/main/java/com/github/jferard/fastods/odselement/OdsElements.java

@@ -31,6 +31,8 @@
 import com.github.jferard.fastods.TableCell;
 import com.github.jferard.fastods.datastyle.DataStyle;
 import com.github.jferard.fastods.datastyle.DataStyles;
+import com.github.jferard.fastods.odselement.config.ConfigItem;
+import com.github.jferard.fastods.odselement.config.ConfigItemMapEntry;
 import com.github.jferard.fastods.style.MasterPageStyle;
 import com.github.jferard.fastods.style.ObjectStyle;
 import com.github.jferard.fastods.style.PageLayoutStyle;
@@ -59,6 +61,10 @@ public class OdsElements {
             "Configurations2/popupmenu/", "Configurations2/progressbar/", "Configurations2/statusbar/",
             "Configurations2/toolbar/"};
 
+    // LO only
+    public static final String SC_SPLIT_NORMAL = "0";
+    public static final String SC_SPLIT_FIX = "2";
+
     /**
      * @param positionUtil an util for cell addresses (e.g. "A1")
      * @param xmlUtil      an XML util
@@ -225,6 +231,21 @@ public Table addTableToContent(final String name, final int rowCapacity,
         return table;
     }
 
+    /**
+     * Freeze cells. See https://help.libreoffice.org/Calc/Freezing_Rows_or_Columns_as_Headers
+     *
+     * @param table the table to freeze
+     * @param rowCount the number of rows to freeze (e.g. 1 -> freeze the first row)
+     * @param colCount the number of cols to freeze.
+     */
+    public void freezeCells(final Table table, final int rowCount, final int colCount) {
+        final ConfigItemMapEntry tableConfig = table.getConfigEntry();
+        tableConfig.put(new ConfigItem("HorizontalSplitMode", "short", SC_SPLIT_FIX));
+        tableConfig.put(new ConfigItem("VerticalSplitMode", "short", SC_SPLIT_FIX));
+        tableConfig.put(new ConfigItem("HorizontalSplitPosition", "int", String.valueOf(rowCount)));
+        tableConfig.put(new ConfigItem("VerticalSplitPosition", "int", String.valueOf(colCount)));
+    }
+
     /**
      * Create empty elements for package. Used on save or by the ImmutableElementsFlusher.
      *

fastods/src/main/java/com/github/jferard/fastods/odselement/SettingsElement.java

@@ -84,7 +84,7 @@ static SettingsElement create() {
 	}
 
 	/**
-	 * Add a table config
+	 * Add a table config.
 	 * @param configEntry the config
 	 */
 	public void addTableConfig(final ConfigItemMapEntry configEntry) {

fastods/src/main/java/com/github/jferard/fastods/odselement/config/ConfigItemMapEntry.java

@@ -38,6 +38,14 @@ public interface ConfigItemMapEntry extends ConfigItemCollection<ConfigBlock> {
 	 */
 	boolean add(ConfigBlock block);
 
+	/**
+	 * Put a block in this entry. Replace existing block with the same name.
+	 * @param block the block to add to this entry. May throw
+	 * @return the previous block or null.
+	 * @throws UnsupportedOperationException if the entry is a singleton or a list
+	 */
+	ConfigBlock put(ConfigBlock block);
+
 	/**
 	 * Add an ConfigItem to this entry. Shortcut for {@code add(new ConfigItem(name, type, value))}.
 	 * @param name the name of the item

fastods/src/main/java/com/github/jferard/fastods/odselement/config/ConfigItemMapEntrySequence.java

@@ -84,6 +84,11 @@ public boolean add(final ConfigBlock block) {
 		return this.blocks.add(block);
 	}
 
+	@Override
+	public ConfigBlock put(final ConfigBlock block) {
+		throw new UnsupportedOperationException();
+	}
+
 	/**
 	 * Remove the block at a given index.
 	 * @param i the index.

fastods/src/main/java/com/github/jferard/fastods/odselement/config/ConfigItemMapEntrySet.java

@@ -108,6 +108,12 @@ public boolean add(final ConfigBlock block) {
 		return true;
 	}
 
+	@Override
+	public ConfigBlock put(final ConfigBlock block) {
+		final String name = block.getName();
+		return this.blockByName.put(name, block);
+	}
+
 	/**
 	 * @param o the block to remove
 	 */

fastods/src/main/java/com/github/jferard/fastods/odselement/config/ConfigItemMapEntrySingleton.java

@@ -86,6 +86,11 @@ public boolean add(final ConfigBlock block) {
 		throw new UnsupportedOperationException();
 	}
 
+	@Override
+	public ConfigBlock put(final ConfigBlock block) {
+		throw new UnsupportedOperationException();
+	}
+
 	/**
 	 * @param name the name
 	 * @return true if the unique ConfigBlock has that name