Merge branch 'master' of https://github.com/DanilaFe/abacus

RESOURCES.md

@@ -8,3 +8,5 @@
 * Rembulan(5.3) - https://github.com/mjanicek/rembulan
 * LuaJava - https://github.com/jasonsantos/luajava
 * jnlua - https://code.google.com/archive/p/jnlua/ 
+## Gist
+* https://gist.github.com/rileyJones/1c18338821b88e92a477bfa270344db3

src/org/nwapw/abacus/Abacus.java

@@ -23,7 +23,7 @@ public class Abacus {
         }
         manager = new PluginManager();
         manager.addInstantiated(new StandardPlugin(manager));
-        mainUi = new Window();
+        mainUi = new Window(manager);
         mainUi.setVisible(true);
     }
 

src/org/nwapw/abacus/lexing/Lexer.java

@@ -87,11 +87,12 @@ public class Lexer<T> {
         int index = startAt;
         ArrayList<Match<T>> matches = new ArrayList<>();
         Match<T> lastMatch = null;
-        while((lastMatch = lexOne(from, index, compare)) != null && index < from.length()){
+        while(index < from.length() && (lastMatch = lexOne(from, index, compare)) != null){
             if(lastMatch.getTo() == lastMatch.getFrom()) return null;
             matches.add(lastMatch);
             index += lastMatch.getTo() - lastMatch.getFrom();
         }
+        if(lastMatch == null) return null;
         return matches;
     }
 

src/org/nwapw/abacus/tree/NumberNode.java

@@ -44,4 +44,9 @@ public class NumberNode extends TreeNode {
     public NumberInterface getNumber() {
         return number;
     }
+
+    @Override
+    public <T> T reduce(Reducer<T> reducer) {
+        return reducer.reduceNode(this);
+    }
 }

src/org/nwapw/abacus/tree/NumberReducer.java

@@ -0,0 +1,26 @@
+package org.nwapw.abacus.tree;
+
+import org.nwapw.abacus.number.NumberInterface;
+import org.nwapw.abacus.plugin.PluginManager;
+
+public class NumberReducer implements Reducer<NumberInterface> {
+
+    private PluginManager manager;
+
+    public NumberReducer(PluginManager manager){
+        this.manager = manager;
+    }
+
+    @Override
+    public NumberInterface reduceNode(TreeNode node, Object... children) {
+        if(node instanceof NumberNode) {
+            return ((NumberNode) node).getNumber();
+        } else if(node instanceof OpNode){
+            NumberInterface left = (NumberInterface) children[0];
+            NumberInterface right = (NumberInterface) children[1];
+            return manager.functionFor(((OpNode) node).getOperation()).apply(left, right);
+        }
+        return null;
+    }
+
+}

src/org/nwapw/abacus/tree/OpNode.java

@@ -18,6 +18,8 @@ public class OpNode extends TreeNode {
      */
     private TreeNode right;
 
+    private OpNode() {}
+
     /**
      * Creates a new operation node with the given operation
      * and no child nodes.
@@ -79,4 +81,11 @@ public class OpNode extends TreeNode {
     public void setRight(TreeNode right) {
         this.right = right;
     }
+
+    @Override
+    public <T> T reduce(Reducer<T> reducer) {
+        T leftReduce = left.reduce(reducer);
+        T rightReduce = right.reduce(reducer);
+        return reducer.reduceNode(this, leftReduce, rightReduce);
+    }
 }

src/org/nwapw/abacus/tree/Reducer.java

@@ -0,0 +1,17 @@
+package org.nwapw.abacus.tree;
+
+/**
+ * Interface used to reduce a tree into a single value.
+ * @param <T> the value to reduce into.
+ */
+public interface Reducer<T> {
+
+    /**
+     * Reduces the given tree into a single value of type T.
+     * @param node the node being passed in to be reduced.
+     * @param children the already-reduced children of this node.
+     * @return the resulting value from the reduce.
+     */
+    public T reduceNode(TreeNode node, Object...children);
+
+}

src/org/nwapw/abacus/tree/TreeNode.java

@@ -14,7 +14,6 @@ public abstract class TreeNode {
      * The lexer used to lex tokens.
      */
     private static Lexer<TokenType> lexer = new Lexer<TokenType>(){{
-        register(".", TokenType.ANY);
         register("\\+|-|\\*|/|^", TokenType.OP);
         register("[0-9]+(\\.[0-9]+)?", TokenType.NUM);
         register("[a-zA-Z]+", TokenType.WORD);
@@ -130,11 +129,15 @@ public abstract class TreeNode {
      * @return the resulting tree.
      */
     public static TreeNode fromString(String string){
-        ArrayList<Match<TokenType>> matches = intoPostfix(string, tokenize(string));
+        ArrayList<Match<TokenType>> matches = tokenize(string);
+        if(matches == null) return null;
+        matches = intoPostfix(string, matches);
         if(matches == null) return null;
 
         Collections.reverse(matches);
         return fromStringRecursive(string, matches);
     }
 
+    public abstract <T> T reduce(Reducer<T> reducer);
+
 }

src/org/nwapw/abacus/window/HistoryTableModel.java

@@ -0,0 +1,97 @@
+package org.nwapw.abacus.window;
+
+import org.nwapw.abacus.tree.TreeNode;
+
+import javax.swing.event.TableModelListener;
+import javax.swing.table.AbstractTableModel;
+import javax.swing.table.TableModel;
+import java.util.ArrayList;
+
+public class HistoryTableModel extends AbstractTableModel {
+
+    public static final String[] COLUMN_NAMES = {
+            "Input",
+            "Parsed Input",
+            "Output"
+    };
+
+    public static final Class[] CLASS_TYPES = {
+            String.class,
+            TreeNode.class,
+            String.class
+    };
+
+    public static class HistoryEntry {
+        public String input;
+        public TreeNode parsedInput;
+        public String output;
+
+        public HistoryEntry(String input, TreeNode parsedInput, String output){
+            this.input = input;
+            this.parsedInput = parsedInput;
+            this.output = output;
+        }
+
+        Object nthValue(int n){
+            if(n == 0) return input;
+            if(n == 1) return parsedInput;
+            if(n == 2) return output;
+            return null;
+        }
+    }
+
+    ArrayList<HistoryEntry> entries;
+
+    public HistoryTableModel() {
+        entries = new ArrayList<>();
+    }
+
+    public void addEntry(HistoryEntry entry){
+        entries.add(entry);
+    }
+
+        @Override
+    public int getRowCount() {
+        return entries.size();
+    }
+
+    @Override
+    public int getColumnCount() {
+        return 3;
+    }
+
+    @Override
+    public String getColumnName(int columnIndex) {
+        return COLUMN_NAMES[columnIndex];
+    }
+
+    @Override
+    public Class<?> getColumnClass(int columnIndex) {
+        return CLASS_TYPES[columnIndex];
+    }
+
+    @Override
+    public boolean isCellEditable(int rowIndex, int columnIndex) {
+        return false;
+    }
+
+    @Override
+    public Object getValueAt(int rowIndex, int columnIndex) {
+        return entries.get(rowIndex).nthValue(columnIndex);
+    }
+
+    @Override
+    public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
+        return;
+    }
+
+    @Override
+    public void addTableModelListener(TableModelListener l) {
+
+    }
+
+    @Override
+    public void removeTableModelListener(TableModelListener l) {
+
+    }
+}

src/org/nwapw/abacus/window/Window.java

@@ -1,13 +1,35 @@
 package org.nwapw.abacus.window;
 
+import org.nwapw.abacus.plugin.PluginManager;
+import org.nwapw.abacus.tree.NumberReducer;
+import org.nwapw.abacus.tree.TreeNode;
+
 import javax.swing.*;
 import java.awt.*;
+import java.awt.datatransfer.StringSelection;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
 
 /**
  * The main UI window for the calculator.
  */
 public class Window extends JFrame {
 
+    private static final String CALC_STRING = "Calculate";
+    private static final String SELECT_STRING = "Select";
+    private static final String SYNTAX_ERR_STRING = "Syntax Error";
+    private static final String NUMBER_SYSTEM_LABEL = "Number Type:";
+    private static final String FUNCTION_LABEL = "Functions:";
+
+    /**
+     * The plugin manager used to retrieve functions.
+     */
+    private PluginManager manager;
+    /**
+     * The reducer used to evaluate the tree.
+     */
+    private NumberReducer reducer;
+
     /**
      * A collection of outputs from the calculator.
      */
@@ -26,13 +48,17 @@ public class Window extends JFrame {
      */
     private JTextArea lastOutputArea;
     /**
-     * The text area used for all history output.
+     * The table used for storing history results.
      */
-    private JTextArea historyArea;
+    private JTable historyTable;
+    /**
+     * The table model used for managing history.
+     */
+    private HistoryTableModel historyModel;
     /**
      * The scroll pane for the history area.
      */
-    private JScrollPane historyAreaScroll;
+    private JScrollPane historyScroll;
 
     /**
      * The panel where the input occurs.
@@ -74,9 +100,21 @@ public class Window extends JFrame {
      */
     private JButton functionSelectButton;
 
-    public Window() {
-        super();
+    /**
+     * Creates a new window with the given manager.
+     * @param manager the manager to use.
+     */
+    public Window(PluginManager manager){
+        this();
+        this.manager = manager;
+        reducer = new NumberReducer(manager);
+    }
 
+    /**
+     * Creates a new window.
+     */
+    private Window() {
+        super();
 
         history = "";
         lastOutput = "";
@@ -84,37 +122,37 @@ public class Window extends JFrame {
         setSize(640, 480);
 
         inputField = new JTextField();
-        inputEnterButton = new JButton("Calculate");
+        inputEnterButton = new JButton(CALC_STRING);
 
         inputPanel = new JPanel();
         inputPanel.setLayout(new BorderLayout());
         inputPanel.add(inputField, BorderLayout.CENTER);
         inputPanel.add(inputEnterButton, BorderLayout.EAST);
 
-        historyArea = new JTextArea(history);
-        historyAreaScroll = new JScrollPane(historyArea);
+        historyModel = new HistoryTableModel();
+        historyTable = new JTable(historyModel);
+        historyScroll = new JScrollPane(historyTable);
         lastOutputArea = new JTextArea(lastOutput);
         lastOutputArea.setEditable(false);
-        lastOutputArea.setText(":)");
 
         outputPanel = new JPanel();
         outputPanel.setLayout(new BorderLayout());
-        outputPanel.add(historyAreaScroll, BorderLayout.CENTER);
+        outputPanel.add(historyScroll, BorderLayout.CENTER);
         outputPanel.add(lastOutputArea, BorderLayout.SOUTH);
 
         numberSystemList = new JComboBox<>();
 
         numberSystemPanel = new JPanel();
         numberSystemPanel.setLayout(new BorderLayout());
-        numberSystemPanel.add(new JLabel("Number Type:"), BorderLayout.NORTH);
+        numberSystemPanel.add(new JLabel(NUMBER_SYSTEM_LABEL), BorderLayout.NORTH);
         numberSystemPanel.add(numberSystemList, BorderLayout.CENTER);
 
         functionList = new JComboBox<>();
-        functionSelectButton = new JButton("Select");
+        functionSelectButton = new JButton(SELECT_STRING);
 
         functionSelectPanel = new JPanel();
         functionSelectPanel.setLayout(new BorderLayout());
-        functionSelectPanel.add(new JLabel("Functions:"), BorderLayout.NORTH);
+        functionSelectPanel.add(new JLabel(FUNCTION_LABEL), BorderLayout.NORTH);
         functionSelectPanel.add(functionList, BorderLayout.CENTER);
         functionSelectPanel.add(functionSelectButton, BorderLayout.SOUTH);
 
@@ -126,5 +164,33 @@ public class Window extends JFrame {
         add(outputPanel, BorderLayout.CENTER);
         add(sidePanel, BorderLayout.EAST);
         add(inputPanel, BorderLayout.SOUTH);
+
+        inputEnterButton.addActionListener((event) -> {
+            TreeNode parsedExpression = TreeNode.fromString(inputField.getText());
+            if(parsedExpression == null){
+                lastOutputArea.setText(SYNTAX_ERR_STRING);
+                return;
+            }
+            lastOutput = parsedExpression.reduce(reducer).toString();
+            history += (history.length() == 0) ? "" : "\n\n";
+            history += lastOutput;
+
+            historyModel.addEntry(new HistoryTableModel.HistoryEntry(inputField.getText(), parsedExpression, lastOutput));
+            historyTable.invalidate();
+            lastOutputArea.setText(lastOutput);
+            inputField.setText(lastOutput);
+        });
+        historyTable.addMouseListener(new MouseAdapter() {
+            @Override
+            public void mouseClicked(MouseEvent e) {
+                Point clickPoint = e.getPoint();
+                if(e.getClickCount() == 2){
+                    int row = historyTable.rowAtPoint(clickPoint);
+                    int column = historyTable.columnAtPoint(clickPoint);
+                    String toCopy = historyTable.getValueAt(row, column).toString();
+                    Toolkit.getDefaultToolkit().getSystemClipboard().setContents(new StringSelection(toCopy), null);
+                }
+            }
+        });
     }
 }