X-Git-Url: http://git.nikiroo.be/?a=blobdiff_plain;f=src%2Fjexer%2Fbits%2FClipboard.java;fp=src%2Fjexer%2Fbits%2FClipboard.java;h=114a732bee12d824318c2b4a5dddca7220500e80;hb=54eaded07d2c1c37d9e1000abdcc97be09955867;hp=0000000000000000000000000000000000000000;hpb=aac4f7d63b892dde46508318910cc173369dd111;p=fanfix.git

diff --git a/src/jexer/bits/Clipboard.java b/src/jexer/bits/Clipboard.java
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+/*
+ * Jexer - Java Text User Interface
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2019 Kevin Lamonte
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * @author Kevin Lamonte [kevin.lamonte@gmail.com]
+ * @version 1
+ */
+package jexer.bits;
+
+import java.awt.Image;
+import java.awt.Toolkit;
+import java.awt.datatransfer.DataFlavor;
+import java.awt.datatransfer.StringSelection;
+import java.awt.datatransfer.Transferable;
+import java.awt.datatransfer.UnsupportedFlavorException;
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+
+/**
+ * Clipboard provides convenience methods to copy text and images to and from
+ * a shared clipboard.  When the system clipboard is available it is used.
+ */
+public class Clipboard {
+
+    // ------------------------------------------------------------------------
+    // Variables --------------------------------------------------------------
+    // ------------------------------------------------------------------------
+
+    /**
+     * The image last copied to the clipboard.
+     */
+    private BufferedImage image = null;
+
+    /**
+     * The text string last copied to the clipboard.
+     */
+    private String text = null;
+
+    /**
+     * The system clipboard, or null if it is not available.
+     */
+    private java.awt.datatransfer.Clipboard systemClipboard = null;
+
+    // ------------------------------------------------------------------------
+    // Constructors -----------------------------------------------------------
+    // ------------------------------------------------------------------------
+
+    /**
+     * Public constructor.
+     */
+    public Clipboard() {
+        try {
+            systemClipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
+        } catch (java.awt.HeadlessException e) {
+            // SQUASH
+        }
+    }
+
+    // ------------------------------------------------------------------------
+    // Clipboard --------------------------------------------------------------
+    // ------------------------------------------------------------------------
+
+    /**
+     * Copy an image to the clipboard.
+     *
+     * @param image image to copy
+     */
+    public void copyImage(final BufferedImage image) {
+        this.image = image;
+        if (systemClipboard != null) {
+            // TODO
+        }
+    }
+
+    /**
+     * Copy a text string to the clipboard.
+     *
+     * @param text string to copy
+     */
+    public void copyText(final String text) {
+        this.text = text;
+        if (systemClipboard != null) {
+            StringSelection stringSelection = new StringSelection(text);
+            systemClipboard.setContents(stringSelection, null);
+        }
+    }
+
+    /**
+     * Obtain an image from the clipboard.
+     *
+     * @return image from the clipboard, or null if no image is available
+     */
+    public BufferedImage pasteImage() {
+        if (systemClipboard != null) {
+            getClipboardImage();
+        }
+        return image;
+    }
+
+    /**
+     * Obtain a text string from the clipboard.
+     *
+     * @return text string from the clipboard, or null if no text is
+     * available
+     */
+    public String pasteText() {
+        if (systemClipboard != null) {
+            getClipboardText();
+        }
+        return text;
+    }
+
+    /**
+     * Returns true if the clipboard has an image.
+     *
+     * @return true if an image is available from the clipboard
+     */
+    public boolean isImage() {
+        if (image == null) {
+            getClipboardImage();
+        }
+        return (image != null);
+    }
+
+    /**
+     * Returns true if the clipboard has a text string.
+     *
+     * @return true if a text string is available from the clipboard
+     */
+    public boolean isText() {
+        if (text == null) {
+            getClipboardText();
+        }
+        return (text != null);
+    }
+
+    /**
+     * Returns true if the clipboard is empty.
+     *
+     * @return true if the clipboard is empty
+     */
+    public boolean isEmpty() {
+        return ((isText() == false) && (isImage() == false));
+    }
+
+    /**
+     * Copy image from the clipboard to text.
+     */
+    private void getClipboardImage() {
+        if (systemClipboard != null) {
+            Transferable contents = systemClipboard.getContents(null);
+            if (contents != null) {
+                if (contents.isDataFlavorSupported(DataFlavor.imageFlavor)) {
+                    try {
+                        Image img = (Image) contents.getTransferData(DataFlavor.imageFlavor);
+                        image = new BufferedImage(img.getWidth(null),
+                            img.getHeight(null), BufferedImage.TYPE_INT_ARGB);
+                        image.getGraphics().drawImage(img, 0, 0, null);
+                    } catch (IOException e) {
+                        // SQUASH
+                    } catch (UnsupportedFlavorException e) {
+                        // SQUASH
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Copy text string from the clipboard to text.
+     */
+    private void getClipboardText() {
+        if (systemClipboard != null) {
+            Transferable contents = systemClipboard.getContents(null);
+            if (contents != null) {
+                if (contents.isDataFlavorSupported(DataFlavor.stringFlavor)) {
+                    try {
+                        text = (String) contents.getTransferData(DataFlavor.stringFlavor);
+                    } catch (IOException e) {
+                        // SQUASH
+                    } catch (UnsupportedFlavorException e) {
+                        // SQUASH
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Clear whatever is on the local clipboard.  Note that this will not
+     * clear the system clipboard.
+     */
+    public void clear() {
+        image = null;
+        text = null;
+    }
+
+}