--- /dev/null
+/*
+ * 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.Color;
+import java.awt.image.BufferedImage;
+
+/**
+ * This class represents a single text cell or bit of image on the screen.
+ */
+public final class Cell extends CellAttributes {
+
+ // ------------------------------------------------------------------------
+ // Constants --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * How this cell needs to be displayed if it is part of a larger glyph.
+ */
+ public enum Width {
+ /**
+ * This cell is an entire glyph on its own.
+ */
+ SINGLE,
+
+ /**
+ * This cell is the left half of a wide glyph.
+ */
+ LEFT,
+
+ /**
+ * This cell is the right half of a wide glyph.
+ */
+ RIGHT,
+ }
+
+ /**
+ * The special "this cell is unset" (null) value. This is the Unicode
+ * "not a character" value.
+ */
+ private static final char UNSET_VALUE = (char) 65535;
+
+ // ------------------------------------------------------------------------
+ // Variables --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * The character at this cell.
+ */
+ private int ch = ' ';
+
+ /**
+ * The display width of this cell.
+ */
+ private Width width = Width.SINGLE;
+
+ /**
+ * The image at this cell.
+ */
+ private BufferedImage image = null;
+
+ /**
+ * The image at this cell, inverted.
+ */
+ private BufferedImage invertedImage = null;
+
+ /**
+ * The background color used for the area the image portion might not
+ * cover.
+ */
+ private Color background = Color.BLACK;
+
+ /**
+ * hashCode() needs to call image.hashCode(), which can get quite
+ * expensive.
+ */
+ private int imageHashCode = 0;
+
+ /**
+ * hashCode() needs to call background.hashCode(), which can get quite
+ * expensive.
+ */
+ private int backgroundHashCode = 0;
+
+ // ------------------------------------------------------------------------
+ // Constructors -----------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Public constructor sets default values of the cell to blank.
+ *
+ * @see #isBlank()
+ * @see #reset()
+ */
+ public Cell() {
+ // NOP
+ }
+
+ /**
+ * Public constructor sets the character. Attributes are the same as
+ * default.
+ *
+ * @param ch character to set to
+ * @see #reset()
+ */
+ public Cell(final int ch) {
+ this.ch = ch;
+ }
+
+ /**
+ * Public constructor sets the attributes.
+ *
+ * @param attr attributes to use
+ */
+ public Cell(final CellAttributes attr) {
+ super(attr);
+ }
+
+ /**
+ * Public constructor sets the character and attributes.
+ *
+ * @param ch character to set to
+ * @param attr attributes to use
+ */
+ public Cell(final int ch, final CellAttributes attr) {
+ super(attr);
+ this.ch = ch;
+ }
+
+ /**
+ * Public constructor creates a duplicate.
+ *
+ * @param cell the instance to copy
+ */
+ public Cell(final Cell cell) {
+ setTo(cell);
+ }
+
+ // ------------------------------------------------------------------------
+ // Cell -------------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Set the image data for this cell.
+ *
+ * @param image the image for this cell
+ */
+ public void setImage(final BufferedImage image) {
+ this.image = image;
+ imageHashCode = image.hashCode();
+ width = Width.SINGLE;
+ }
+
+ /**
+ * Get the image data for this cell.
+ *
+ * @return the image for this cell
+ */
+ public BufferedImage getImage() {
+ if (invertedImage != null) {
+ return invertedImage;
+ }
+ return image;
+ }
+
+ /**
+ * Get the bitmap image background color for this cell.
+ *
+ * @return the bitmap image background color
+ */
+ public Color getBackground() {
+ return background;
+ }
+
+ /**
+ * If true, this cell has image data.
+ *
+ * @return true if this cell is an image rather than a character with
+ * attributes
+ */
+ public boolean isImage() {
+ if (image != null) {
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * Restore the image in this cell to its normal version, if it has one.
+ */
+ public void restoreImage() {
+ invertedImage = null;
+ }
+
+ /**
+ * If true, this cell has image data, and that data is inverted.
+ *
+ * @return true if this cell is an image rather than a character with
+ * attributes, and the data is inverted
+ */
+ public boolean isInvertedImage() {
+ if ((image != null) && (invertedImage != null)) {
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * Invert the image in this cell, if it has one.
+ */
+ public void invertImage() {
+ if (image == null) {
+ return;
+ }
+ if (invertedImage == null) {
+ invertedImage = new BufferedImage(image.getWidth(),
+ image.getHeight(), BufferedImage.TYPE_INT_ARGB);
+
+ int [] rgbArray = image.getRGB(0, 0,
+ image.getWidth(), image.getHeight(), null, 0, image.getWidth());
+
+ for (int i = 0; i < rgbArray.length; i++) {
+ // Set the colors to fully inverted.
+ if (rgbArray[i] != 0x00FFFFFF) {
+ rgbArray[i] ^= 0x00FFFFFF;
+ }
+ // Also set alpha to non-transparent.
+ rgbArray[i] |= 0xFF000000;
+ }
+ invertedImage.setRGB(0, 0, image.getWidth(), image.getHeight(),
+ rgbArray, 0, image.getWidth());
+ }
+ }
+
+ /**
+ * Getter for cell character.
+ *
+ * @return cell character
+ */
+ public int getChar() {
+ return ch;
+ }
+
+ /**
+ * Setter for cell character.
+ *
+ * @param ch new cell character
+ */
+ public void setChar(final int ch) {
+ this.ch = ch;
+ }
+
+ /**
+ * Getter for cell width.
+ *
+ * @return Width.SINGLE, Width.LEFT, or Width.RIGHT
+ */
+ public Width getWidth() {
+ return width;
+ }
+
+ /**
+ * Setter for cell width.
+ *
+ * @param width new cell width, one of Width.SINGLE, Width.LEFT, or
+ * Width.RIGHT
+ */
+ public void setWidth(final Width width) {
+ this.width = width;
+ }
+
+ /**
+ * Reset this cell to a blank.
+ */
+ @Override
+ public void reset() {
+ super.reset();
+ ch = ' ';
+ width = Width.SINGLE;
+ image = null;
+ imageHashCode = 0;
+ invertedImage = null;
+ background = Color.BLACK;
+ backgroundHashCode = 0;
+ }
+
+ /**
+ * UNset this cell. It will not be equal to any other cell until it has
+ * been assigned attributes and a character.
+ */
+ public void unset() {
+ super.reset();
+ ch = UNSET_VALUE;
+ width = Width.SINGLE;
+ image = null;
+ imageHashCode = 0;
+ invertedImage = null;
+ background = Color.BLACK;
+ backgroundHashCode = 0;
+ }
+
+ /**
+ * Check to see if this cell has default attributes: white foreground,
+ * black background, no bold/blink/reverse/underline/protect, and a
+ * character value of ' ' (space).
+ *
+ * @return true if this cell has default attributes.
+ */
+ public boolean isBlank() {
+ if ((ch == UNSET_VALUE) || (image != null)) {
+ return false;
+ }
+ if ((getForeColor().equals(Color.WHITE))
+ && (getBackColor().equals(Color.BLACK))
+ && !isBold()
+ && !isBlink()
+ && !isReverse()
+ && !isUnderline()
+ && !isProtect()
+ && !isRGB()
+ && !isImage()
+ && (width == Width.SINGLE)
+ && (ch == ' ')
+ ) {
+ return true;
+ }
+
+ return false;
+ }
+
+ /**
+ * Comparison check. All fields must match to return true.
+ *
+ * @param rhs another Cell instance
+ * @return true if all fields are equal
+ */
+ @Override
+ public boolean equals(final Object rhs) {
+ if (!(rhs instanceof Cell)) {
+ return false;
+ }
+
+ Cell that = (Cell) rhs;
+
+ // Unsetted cells can never be equal.
+ if ((ch == UNSET_VALUE) || (that.ch == UNSET_VALUE)) {
+ return false;
+ }
+
+ // If this or rhs has an image and the other doesn't, these are not
+ // equal.
+ if ((image != null) && (that.image == null)) {
+ return false;
+ }
+ if ((image == null) && (that.image != null)) {
+ return false;
+ }
+ // If this and rhs have images, both must match.
+ if ((image != null) && (that.image != null)) {
+ if ((invertedImage == null) && (that.invertedImage != null)) {
+ return false;
+ }
+ if ((invertedImage != null) && (that.invertedImage == null)) {
+ return false;
+ }
+ // Either both objects have their image inverted, or neither do.
+ // Now if the images are identical the cells are the same
+ // visually.
+ if (image.equals(that.image)
+ && (background.equals(that.background))
+ ) {
+ return true;
+ } else {
+ return false;
+ }
+ }
+
+ // Normal case: character and attributes must match.
+ if ((ch == that.ch) && (width == that.width)) {
+ return super.equals(rhs);
+ }
+ return false;
+ }
+
+ /**
+ * Hashcode uses all fields in equals().
+ *
+ * @return the hash
+ */
+ @Override
+ public int hashCode() {
+ int A = 13;
+ int B = 23;
+ int hash = A;
+ hash = (B * hash) + super.hashCode();
+ hash = (B * hash) + (int)ch;
+ hash = (B * hash) + width.hashCode();
+ if (image != null) {
+ /*
+ hash = (B * hash) + image.hashCode();
+ hash = (B * hash) + background.hashCode();
+ */
+ hash = (B * hash) + imageHashCode;
+ hash = (B * hash) + backgroundHashCode;
+ }
+ if (invertedImage != null) {
+ hash = (B * hash) + invertedImage.hashCode();
+ }
+ return hash;
+ }
+
+ /**
+ * Set my field values to that's field.
+ *
+ * @param rhs an instance of either Cell or CellAttributes
+ */
+ @Override
+ public void setTo(final Object rhs) {
+ // Let this throw a ClassCastException
+ CellAttributes thatAttr = (CellAttributes) rhs;
+ this.image = null;
+ this.imageHashCode = 0;
+ this.backgroundHashCode = 0;
+ this.width = Width.SINGLE;
+ super.setTo(thatAttr);
+
+ if (rhs instanceof Cell) {
+ Cell that = (Cell) rhs;
+ this.ch = that.ch;
+ this.width = that.width;
+ this.image = that.image;
+ this.invertedImage = that.invertedImage;
+ this.background = that.background;
+ this.imageHashCode = that.imageHashCode;
+ this.backgroundHashCode = that.backgroundHashCode;
+ }
+ }
+
+ /**
+ * Set my field attr values to that's field.
+ *
+ * @param that a CellAttributes instance
+ */
+ public void setAttr(final CellAttributes that) {
+ image = null;
+ super.setTo(that);
+ }
+
+ /**
+ * Make human-readable description of this Cell.
+ *
+ * @return displayable String
+ */
+ @Override
+ public String toString() {
+ return String.format("fore: %s back: %s bold: %s blink: %s ch %c",
+ getForeColor(), getBackColor(), isBold(), isBlink(), ch);
+ }
+}
git://git.nikiroo.be / fanfix.git / blobdiff