Merge pull request MitchTalmadge#15 from sebkur/add-align-support

Add align support

Author: MitchTalmadge

src/main/java/com/mitchtalmadge/asciidata/table/ASCIITable.java

@@ -17,6 +17,7 @@ public class ASCIITable {
     private final String[][] data;
     private final int columnsCount;
     private final int[] columnWidths;
+    private Align[] aligns;
     private final int emptyWidth;
     private final String emptyMessage = "(empty)";
     private String nullValue = "";
@@ -83,6 +84,11 @@ private ASCIITable(String[] headers, String[][] data) {
             }
         }
 
+        aligns = new Align[columnsCount];
+        for (int i = 0; i < columnsCount; i++) {
+            aligns[i] = Align.LEFT;
+        }
+
         // Determine the width of everything including borders.
         // This is to be used in case there is no data and we must write the empty message to the table.
 
@@ -122,6 +128,11 @@ public ASCIITable withNullValue(String nullValue) {
         return this;
     }
 
+    public ASCIITable alignColumn(int column, Align align) {
+        this.aligns[column] = align;
+        return this;
+    }
+
     @Override
     public String toString() {
         StringBuilder output = new StringBuilder();
@@ -134,7 +145,7 @@ public String toString() {
                 tableFormat.getTopRightCorner());
 
         // Append the headers of the table.
-        appendRow(output, headers);
+        appendRow(output, headers, true);
 
         // Check if the data is empty, in which case, we will only write the empty message into the table contents.
         if (data.length == 0) {
@@ -146,7 +157,7 @@ public String toString() {
 
             // Empty message row
             output.append(tableFormat.getVerticalBorderFill(true))
-                    .append(pad(emptyWidth, emptyMessage))
+                    .append(pad(emptyWidth, Align.LEFT, emptyMessage))
                     .append(tableFormat.getVerticalBorderFill(true))
                     .append('\n');
 
@@ -178,7 +189,7 @@ public String toString() {
                         tableFormat.getRightEdgeBorderDivider(false));
 
             // Append the data for the current row.
-            appendRow(output, data[row]);
+            appendRow(output, data[row], false);
         }
 
         // Horizontal divider at the bottom of the table.
@@ -197,7 +208,7 @@ public String toString() {
      * @param output The output to append to.
      * @param data   The data of the row to append. Each index corresponds to a column.
      */
-    private void appendRow(StringBuilder output, String[] data) {
+    private void appendRow(StringBuilder output, String[] data, boolean isHeader) {
         // Step 1: Determine the row height from the maximum number of lines out of each cell.
         int rowHeight = 0;
         for (int column = 0; column < columnsCount; column++) {
@@ -224,7 +235,11 @@ private void appendRow(StringBuilder output, String[] data) {
                 String cellLine = line < cellLines.length ? cellLines[line] : "";
 
                 // Pad and append the data.
-                output.append(pad(columnWidths[column], cellLine));
+                Align align = Align.LEFT;
+                if (!isHeader) {
+                    align = aligns[column];
+                }
+                output.append(pad(columnWidths[column], align, cellLine));
             }
 
             // Add the right border.
@@ -257,7 +272,7 @@ private void appendHorizontalDivider(StringBuilder output, char left, char fill,
             output.append(column == 0 ? left : middle);
 
             // For the contents of the column, create a padding of the correct width and replace it with the fill border.
-            output.append(pad(columnWidths[column], "").replace(' ', fill));
+            output.append(pad(columnWidths[column], Align.LEFT, "").replace(' ', fill));
         }
 
         // Add the right border
@@ -271,8 +286,12 @@ private void appendHorizontalDivider(StringBuilder output, char left, char fill,
      * @param data  The data to pad.
      * @return The data, padded with spaces to the given width.
      */
-    private static String pad(int width, String data) {
-        return String.format(" %1$-" + width + "s ", data);
+    private static String pad(int width, Align align, String data) {
+        if (align == null || align == Align.LEFT) {
+            return String.format(" %1$-" + width + "s ", data);
+        } else {
+            return String.format(" %1$" + width + "s ", data);
+        }
     }
 
 }

src/main/java/com/mitchtalmadge/asciidata/table/Align.java

@@ -0,0 +1,8 @@
+package com.mitchtalmadge.asciidata.table;
+
+public enum Align {
+
+    LEFT,
+    RIGHT
+
+}

src/test/java/com/mitchtalmadge/asciidata/table/ASCIITableTest.java

@@ -36,6 +36,31 @@ public void testSimpleTable() throws IOException {
 
     }
 
+    /**
+     * Tests a simple table with example data and a right-aligned column.
+     */
+    @Test
+    public void testSimpleTableRightAlign() throws IOException {
+
+        String[] headers = new String[]{"ID", "Name", "Email"};
+        String[][] data = new String[][]{
+                {"123", "Alfred Alan", "aalan@gmail.com"},
+                {"223", "Alison Smart", "asmart@gmail.com"},
+                {"256", "Ben Bessel", "benb@outlook.com"},
+                {"374", "John Roberts", "johnrob@company.com"},
+        };
+
+        assertEquals(
+                TestUtils.commonizeLineEndings(TestUtils.readFileToString("tables/utf8/simpleTableRight.txt")),
+                TestUtils.commonizeLineEndings(ASCIITable.fromData(headers, data).alignColumn(2, Align.RIGHT).toString())
+        );
+        // ASCII Table Format
+        assertEquals(
+                TestUtils.commonizeLineEndings(TestUtils.readFileToString("tables/ascii/simpleTableRight.txt")),
+                TestUtils.commonizeLineEndings(ASCIITable.fromData(headers, data).alignColumn(2, Align.RIGHT).withTableFormat(new ASCIITableFormat()).toString())
+        );
+
+    }
 
     /**
      * Tests tables with no data.

src/test/resources/tables/ascii/simpleTableRight.txt

@@ -0,0 +1,11 @@
++=====+==============+=====================+
+| ID  | Name         | Email               |
+|=====|==============|=====================|
+| 123 | Alfred Alan  |     aalan@gmail.com |
+|-----|--------------|---------------------|
+| 223 | Alison Smart |    asmart@gmail.com |
+|-----|--------------|---------------------|
+| 256 | Ben Bessel   |    benb@outlook.com |
+|-----|--------------|---------------------|
+| 374 | John Roberts | johnrob@company.com |
++=====+==============+=====================+

src/test/resources/tables/utf8/simpleTableRight.txt

@@ -0,0 +1,11 @@
+╔═════╤══════════════╤═════════════════════╗
+║ ID  │ Name         │ Email               ║
+╠═════╪══════════════╪═════════════════════╣
+║ 123 │ Alfred Alan  │     aalan@gmail.com ║
+╟─────┼──────────────┼─────────────────────╢
+║ 223 │ Alison Smart │    asmart@gmail.com ║
+╟─────┼──────────────┼─────────────────────╢
+║ 256 │ Ben Bessel   │    benb@outlook.com ║
+╟─────┼──────────────┼─────────────────────╢
+║ 374 │ John Roberts │ johnrob@company.com ║
+╚═════╧══════════════╧═════════════════════╝