270 lines
8.4 KiB
Java
270 lines
8.4 KiB
Java
package app;
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// Java imports
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import java.awt.*;
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import java.awt.event.*;
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import java.util.*;
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import javax.swing.*;
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// Project imports
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import util.*;
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// Memory viewer and hex editor window
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class MemoryWindow extends ChildWindow {
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// Private fields
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private int address; // Address of top row
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private Font font; // Display font
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private int fontHeight; // Font line height
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private int fontWidth; // Font maximum character width
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// UI components
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private JPanel client; // Client area
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private ArrayList<Row> rows; // Rows of text
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///////////////////////////////////////////////////////////////////////////
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// Classes //
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///////////////////////////////////////////////////////////////////////////
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// One row of output
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private class Row {
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JLabel address; // Address (row header)
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JLabel[] bytes; // Hexadecimal bytes
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}
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///////////////////////////////////////////////////////////////////////////
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// Constructors //
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///////////////////////////////////////////////////////////////////////////
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// Default constructor
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MemoryWindow(MainWindow parent) {
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super(parent, "memory.title");
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// Configure instance fields
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address = 0x00000000;
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font = new Font(Util.fontFamily(new String[]
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{ "Consolas", Font.MONOSPACED } ), Font.PLAIN, 14);
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rows = new ArrayList<Row>();
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// Configure client area
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client = new JPanel(null);
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client.addComponentListener(Util.onResize(e->onResize()));
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client.addKeyListener(Util.onKey(e->onKeyDown(e), null));
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client.addMouseWheelListener(e->onWheel(e));
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client.setBackground(SystemColor.window);
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client.setFocusable(true);
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client.setPreferredSize(new Dimension(480, 360));
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// Configure component
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var content = new JPanel(new BorderLayout());
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content.setBorder(new JScrollPane().getBorder());
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content.add(client, BorderLayout.CENTER);
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setContentPane(content);
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setFont2(font);
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pack();
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}
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///////////////////////////////////////////////////////////////////////////
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// Package Methods //
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///////////////////////////////////////////////////////////////////////////
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// Update the display
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void refresh() {
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// The element is not ready
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if (client == null)
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return;
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// Configure working variables
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int height = client.getHeight();
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int count = (height + fontHeight - 1) / fontHeight;
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var data = new byte[count * 16];
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// Retrieve all visible bytes from the emulation context
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parent.vue.read(address, data, 0, data.length);
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// Update visible rows
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for (int x = 0; x < count; x++) {
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Row row;
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if (x < rows.size())
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row = rows.get(x); // Retrieve row from collection
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else row = createRow(); // Produce a new row
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update(row, x * fontHeight, address + x * 16, data, x * 16);
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setVisible(row, true);
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}
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// Hide any rows that are not visible
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for (int x = count; x < rows.size(); x++)
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setVisible(rows.get(x), false);
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// Finalize layout
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client.revalidate();
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client.repaint();
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}
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// Specify a new font
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void setFont2(Font font) {
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this.font = font;
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// Configure the maximum font dimensions
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var fontMax = new JLabel("!");
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fontMax.setFont(font);
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fontHeight = Math.max(1, fontMax.getPreferredSize().height);
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fontWidth = -1;
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for (int x = 0; x < 16; x++) {
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fontMax.setText(Integer.toString(x, 16).toUpperCase());
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fontWidth = Math.max(fontWidth, fontMax.getPreferredSize().width);
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}
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// Configure rows
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for (var row : rows) {
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row.address.setFont(font);
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for (var label : row.bytes)
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label.setFont(font);
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}
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onResize();
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}
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///////////////////////////////////////////////////////////////////////////
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// Event Handlers //
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///////////////////////////////////////////////////////////////////////////
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// Key down
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private void onKeyDown(KeyEvent e) {
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int code = e.getKeyCode();
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int mods = e.getModifiersEx();
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boolean alt = (mods & InputEvent.ALT_DOWN_MASK ) != 0;
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boolean ctrl = (mods & InputEvent.CTRL_DOWN_MASK) != 0;
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int tall = Math.max(1, tall(false));
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// No Alt combinations
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if (alt) return;
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// Goto
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if (ctrl && code == KeyEvent.VK_G) {
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String addr = JOptionPane.showInputDialog(
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this, "Goto:", "Goto", JOptionPane.PLAIN_MESSAGE);
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if (addr != null && addr.trim().length() != 0) {
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try { setAddress((int) Long.parseLong(addr, 16)); }
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catch (Exception x) { }
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}
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return;
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}
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// Seek
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switch (code) {
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case KeyEvent.VK_UP : setAddress(address - 16); break;
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case KeyEvent.VK_DOWN : setAddress(address + 16); break;
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case KeyEvent.VK_PAGE_UP : setAddress(address - tall * 16); break;
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case KeyEvent.VK_PAGE_DOWN: setAddress(address + tall * 16); break;
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}
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}
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// Client resize
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private void onResize() {
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refresh();
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}
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// Mouse wheel
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private void onWheel(MouseWheelEvent e) {
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int amount = e.getUnitsToScroll();
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int mods = e.getModifiersEx();
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boolean alt = (mods & InputEvent.ALT_DOWN_MASK ) != 0;
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boolean ctrl = (mods & InputEvent.CTRL_DOWN_MASK) != 0;
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// No Alt or Ctrl combinations
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if (amount == 0 || alt || ctrl)
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return;
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// Seek
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setAddress(address + 16 * amount);
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}
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///////////////////////////////////////////////////////////////////////////
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// Private Methods //
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///////////////////////////////////////////////////////////////////////////
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// Add a new row of output
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private Row createRow() {
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var row = new Row();
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// Address label
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row.address = new JLabel();
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row.address.setFont(font);
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row.address.setForeground(SystemColor.windowText);
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row.address.setVisible(false);
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client.add(row.address);
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// Byte labels
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row.bytes = new JLabel[16];
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for (int x = 0; x < row.bytes.length; x++) {
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var label = row.bytes[x] = new JLabel();
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label.setFont(font);
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label.setForeground(SystemColor.windowText);
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label.setHorizontalAlignment(SwingConstants.CENTER);
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label.setVisible(false);
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client.add(label);
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}
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// Add the row to the collection
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rows.add(row);
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return row;
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}
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// Measure the minimum column widths for a row
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private void measure(Row row, int[] widths) {
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widths[0] = Math.max(widths[0], row.address.getPreferredSize().width);
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for (int x = 0; x < 16; x++)
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widths[1] = Math.max(widths[1],
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row.bytes[x].getPreferredSize().width);
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}
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// Specify the address of the top row of output
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private void setAddress(int address) {
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this.address = address & 0xFFFFFFF0;
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refresh();
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}
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// Show or hide a row
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private void setVisible(Row row, boolean visible) {
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row.address.setVisible(visible);
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for (var label : row.bytes)
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label.setVisible(visible);
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}
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// Determine how many rows of output are visible
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private int tall(boolean partial) {
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return (client.getHeight() + (partial?fontHeight-1:0)) / fontHeight;
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}
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// Update the text of a row
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private void update(Row row, int y, int address, byte[] data, int offset) {
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// Update address
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row.address.setBounds(0, y, 8 * fontWidth, fontHeight);
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row.address.setText(String.format("%08X", address));
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// Update bytes
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for (int z = 0, x = 10 * fontWidth; z < 16; z++) {
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var label = row.bytes[z];
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label.setBounds(x, y, 2 * fontWidth, fontHeight);
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label.setText(String.format("%02X", data[offset++] & 0xFF));
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x += fontWidth * (z == 7 ? 4 : 3);
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}
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}
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}
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