more TEditor stubs

[fanfix.git] / src / jexer / TEditorWidget.java

diff --git a/src/jexer/TEditorWidget.java b/src/jexer/TEditorWidget.java
new file mode 100644 (file)
index 0000000..6fed1fc
--- /dev/null
+++ b/src/jexer/TEditorWidget.java
@@ -0,0 +1,169 @@
+/*
+ * Jexer - Java Text User Interface
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2017 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;
+
+import jexer.bits.CellAttributes;
+import jexer.event.TKeypressEvent;
+import jexer.event.TMouseEvent;
+import jexer.teditor.Document;
+import jexer.teditor.Line;
+import jexer.teditor.Word;
+import static jexer.TKeypress.*;
+
+/**
+ * TEditorWidget displays an editable text document.  It is unaware of
+ * scrolling behavior, but can respond to mouse and keyboard events.
+ */
+public final class TEditorWidget extends TWidget {
+
+    /**
+     * The document being edited.
+     */
+    private Document document;
+
+    /**
+     * Public constructor.
+     *
+     * @param parent parent widget
+     * @param text text on the screen
+     * @param x column relative to parent
+     * @param y row relative to parent
+     * @param width width of text area
+     * @param height height of text area
+     */
+    public TEditorWidget(final TWidget parent, final String text, final int x,
+        final int y, final int width, final int height) {
+
+        // Set parent and window
+        super(parent, x, y, width, height);
+
+        setCursorVisible(true);
+        document = new Document(text);
+    }
+
+    /**
+     * Draw the text box.
+     */
+    @Override
+    public void draw() {
+        // Setup my color
+        CellAttributes color = getTheme().getColor("teditor");
+
+        int lineNumber = document.getLineNumber();
+        for (int i = 0; i < getHeight(); i++) {
+            // Background line
+            getScreen().hLineXY(0, i, getWidth(), ' ', color);
+
+            // Now draw document's line
+            if (lineNumber + i < document.getLineCount()) {
+                Line line = document.getLine(lineNumber + i);
+                int x = 0;
+                for (Word word: line.getWords()) {
+                    getScreen().putStringXY(x, i, word.getText(),
+                        word.getColor());
+                    x += word.getDisplayLength();
+                    if (x > getWidth()) {
+                        break;
+                    }
+                }
+            }
+        }
+
+    }
+
+    /**
+     * Handle mouse press events.
+     *
+     * @param mouse mouse button press event
+     */
+    @Override
+    public void onMouseDown(final TMouseEvent mouse) {
+        if (mouse.isMouseWheelUp()) {
+            document.up();
+            return;
+        }
+        if (mouse.isMouseWheelDown()) {
+            document.down();
+            return;
+        }
+
+        // TODO: click sets row and column
+
+        // Pass to children
+        super.onMouseDown(mouse);
+    }
+
+    /**
+     * Handle keystrokes.
+     *
+     * @param keypress keystroke event
+     */
+    @Override
+    public void onKeypress(final TKeypressEvent keypress) {
+        if (keypress.equals(kbLeft)) {
+            document.left();
+        } else if (keypress.equals(kbRight)) {
+            document.right();
+        } else if (keypress.equals(kbUp)) {
+            document.up();
+        } else if (keypress.equals(kbDown)) {
+            document.down();
+        } else if (keypress.equals(kbPgUp)) {
+            document.up(getHeight() - 1);
+        } else if (keypress.equals(kbPgDn)) {
+            document.down(getHeight() - 1);
+        } else if (keypress.equals(kbHome)) {
+            document.home();
+        } else if (keypress.equals(kbEnd)) {
+            document.end();
+        } else if (keypress.equals(kbCtrlHome)) {
+            document.setLineNumber(0);
+            document.home();
+        } else if (keypress.equals(kbCtrlEnd)) {
+            document.setLineNumber(document.getLineCount() - 1);
+            document.end();
+        } else if (keypress.equals(kbIns)) {
+            document.setOverwrite(!document.getOverwrite());
+        } else if (keypress.equals(kbDel)) {
+            document.del();
+        } else if (keypress.equals(kbBackspace)) {
+            document.backspace();
+        } else if (!keypress.getKey().isFnKey()
+            && !keypress.getKey().isAlt()
+            && !keypress.getKey().isCtrl()
+        ) {
+            // Plain old keystroke, process it
+            document.addChar(keypress.getKey().getChar());
+        } else {
+            // Pass other keys (tab etc.) on to TWidget
+            super.onKeypress(keypress);
+        }
+    }
+
+}