--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/com/five_ten_sg/connectbot/bean/SelectionArea.java	Thu May 22 10:41:19 2014 -0700
@@ -0,0 +1,198 @@
+/*
+ * ConnectBot: simple, powerful, open-source SSH client for Android
+ * Copyright 2007 Kenny Root, Jeffrey Sharkey
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.five_ten_sg.connectbot.bean;
+
+import de.mud.terminal.VDUBuffer;
+
+/**
+ * @author Kenny Root
+ * Keep track of a selection area for the terminal copying mechanism.
+ * If the orientation is flipped one way, swap the bottom and top or
+ * left and right to keep it in the correct orientation.
+ */
+public class SelectionArea {
+    private int top;
+    private int bottom;
+    private int left;
+    private int right;
+    private int maxColumns;
+    private int maxRows;
+    private boolean selectingOrigin;
+
+    public SelectionArea() {
+        reset();
+    }
+
+    public final void reset() {
+        top = left = bottom = right = 0;
+        selectingOrigin = true;
+    }
+
+    /**
+     * @param columns
+     * @param rows
+     */
+    public void setBounds(int columns, int rows) {
+        maxColumns = columns - 1;
+        maxRows = rows - 1;
+    }
+
+    private int checkBounds(int value, int max) {
+        if (value < 0)
+            return 0;
+        else if (value > max)
+            return max;
+        else
+            return value;
+    }
+
+    public boolean isSelectingOrigin() {
+        return selectingOrigin;
+    }
+
+    public void finishSelectingOrigin() {
+        selectingOrigin = false;
+    }
+
+    public void decrementRow() {
+        if (selectingOrigin)
+            setTop(top - 1);
+        else
+            setBottom(bottom - 1);
+    }
+
+    public void incrementRow() {
+        if (selectingOrigin)
+            setTop(top + 1);
+        else
+            setBottom(bottom + 1);
+    }
+
+    public void setRow(int row) {
+        if (selectingOrigin)
+            setTop(row);
+        else
+            setBottom(row);
+    }
+
+    private void setTop(int top) {
+        this.top = bottom = checkBounds(top, maxRows);
+    }
+
+    public int getTop() {
+        return Math.min(top, bottom);
+    }
+
+    private void setBottom(int bottom) {
+        this.bottom = checkBounds(bottom, maxRows);
+    }
+
+    public int getBottom() {
+        return Math.max(top, bottom);
+    }
+
+    public void decrementColumn() {
+        if (selectingOrigin)
+            setLeft(left - 1);
+        else
+            setRight(right - 1);
+    }
+
+    public void incrementColumn() {
+        if (selectingOrigin)
+            setLeft(left + 1);
+        else
+            setRight(right + 1);
+    }
+
+    public void setColumn(int column) {
+        if (selectingOrigin)
+            setLeft(column);
+        else
+            setRight(column);
+    }
+
+    private void setLeft(int left) {
+        this.left = right = checkBounds(left, maxColumns);
+    }
+
+    public int getLeft() {
+        return Math.min(left, right);
+    }
+
+    private void setRight(int right) {
+        this.right = checkBounds(right, maxColumns);
+    }
+
+    public int getRight() {
+        return Math.max(left, right);
+    }
+
+    public String copyFrom(VDUBuffer vb) {
+        int size = (getRight() - getLeft() + 1) * (getBottom() - getTop() + 1);
+        StringBuffer buffer = new StringBuffer(size);
+
+        for (int y = getTop(); y <= getBottom(); y++) {
+            int lastNonSpace = buffer.length();
+
+            for (int x = getLeft(); x <= getRight(); x++) {
+                // only copy printable chars
+                char c = vb.getChar(x, y);
+
+                if (!Character.isDefined(c) ||
+                        (Character.isISOControl(c) && c != '\t'))
+                    c = ' ';
+
+                if (c != ' ')
+                    lastNonSpace = buffer.length();
+
+                buffer.append(c);
+            }
+
+            // Don't leave a bunch of spaces in our copy buffer.
+            if (buffer.length() > lastNonSpace)
+                buffer.delete(lastNonSpace + 1, buffer.length());
+
+            if (y != bottom)
+                buffer.append("\n");
+        }
+
+        return buffer.toString();
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder buffer = new StringBuilder();
+        buffer.append("SelectionArea[top=");
+        buffer.append(top);
+        buffer.append(", bottom=");
+        buffer.append(bottom);
+        buffer.append(", left=");
+        buffer.append(left);
+        buffer.append(", right=");
+        buffer.append(right);
+        buffer.append(", maxColumns=");
+        buffer.append(maxColumns);
+        buffer.append(", maxRows=");
+        buffer.append(maxRows);
+        buffer.append(", isSelectingOrigin=");
+        buffer.append(isSelectingOrigin());
+        buffer.append("]");
+        return buffer.toString();
+    }
+}