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[fanfix.git] / src / jexer / backend / Screen.java

/*
 * 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.backend;

import jexer.bits.Cell;
import jexer.bits.CellAttributes;

/**
 * Drawing operations API.
 */
public interface Screen {

    /**
     * Set drawing offset for x.
     *
     * @param offsetX new drawing offset
     */
    public void setOffsetX(final int offsetX);

    /**
     * Set drawing offset for y.
     *
     * @param offsetY new drawing offset
     */
    public void setOffsetY(final int offsetY);

    /**
     * Get right drawing clipping boundary.
     *
     * @return drawing boundary
     */
    public int getClipRight();

    /**
     * Set right drawing clipping boundary.
     *
     * @param clipRight new boundary
     */
    public void setClipRight(final int clipRight);

    /**
     * Get bottom drawing clipping boundary.
     *
     * @return drawing boundary
     */
    public int getClipBottom();

    /**
     * Set bottom drawing clipping boundary.
     *
     * @param clipBottom new boundary
     */
    public void setClipBottom(final int clipBottom);

    /**
     * Get left drawing clipping boundary.
     *
     * @return drawing boundary
     */
    public int getClipLeft();

    /**
     * Set left drawing clipping boundary.
     *
     * @param clipLeft new boundary
     */
    public void setClipLeft(final int clipLeft);

    /**
     * Get top drawing clipping boundary.
     *
     * @return drawing boundary
     */
    public int getClipTop();

    /**
     * Set top drawing clipping boundary.
     *
     * @param clipTop new boundary
     */
    public void setClipTop(final int clipTop);

    /**
     * Get dirty flag.
     *
     * @return if true, the logical screen is not in sync with the physical
     * screen
     */
    public boolean isDirty();

    /**
     * Get the attributes at one location.
     *
     * @param x column coordinate.  0 is the left-most column.
     * @param y row coordinate.  0 is the top-most row.
     * @return attributes at (x, y)
     */
    public CellAttributes getAttrXY(final int x, final int y);

    /**
     * Get the cell at one location.
     *
     * @param x column coordinate.  0 is the left-most column.
     * @param y row coordinate.  0 is the top-most row.
     * @return the character + attributes
     */
    public Cell getCharXY(final int x, final int y);

    /**
     * Set the attributes at one location.
     *
     * @param x column coordinate.  0 is the left-most column.
     * @param y row coordinate.  0 is the top-most row.
     * @param attr attributes to use (bold, foreColor, backColor)
     */
    public void putAttrXY(final int x, final int y,
        final CellAttributes attr);

    /**
     * Set the attributes at one location.
     *
     * @param x column coordinate.  0 is the left-most column.
     * @param y row coordinate.  0 is the top-most row.
     * @param attr attributes to use (bold, foreColor, backColor)
     * @param clip if true, honor clipping/offset
     */
    public void putAttrXY(final int x, final int y,
        final CellAttributes attr, final boolean clip);

    /**
     * Fill the entire screen with one character with attributes.
     *
     * @param ch character to draw
     * @param attr attributes to use (bold, foreColor, backColor)
     */
    public void putAll(final char ch, final CellAttributes attr);

    /**
     * Render one character with attributes.
     *
     * @param x column coordinate.  0 is the left-most column.
     * @param y row coordinate.  0 is the top-most row.
     * @param ch character + attributes to draw
     */
    public void putCharXY(final int x, final int y, final Cell ch);

    /**
     * Render one character with attributes.
     *
     * @param x column coordinate.  0 is the left-most column.
     * @param y row coordinate.  0 is the top-most row.
     * @param ch character to draw
     * @param attr attributes to use (bold, foreColor, backColor)
     */
    public void putCharXY(final int x, final int y, final char ch,
        final CellAttributes attr);

    /**
     * Render one character without changing the underlying attributes.
     *
     * @param x column coordinate.  0 is the left-most column.
     * @param y row coordinate.  0 is the top-most row.
     * @param ch character to draw
     */
    public void putCharXY(final int x, final int y, final char ch);

    /**
     * Render a string.  Does not wrap if the string exceeds the line.
     *
     * @param x column coordinate.  0 is the left-most column.
     * @param y row coordinate.  0 is the top-most row.
     * @param str string to draw
     * @param attr attributes to use (bold, foreColor, backColor)
     */
    public void putStringXY(final int x, final int y, final String str,
        final CellAttributes attr);

    /**
     * Render a string without changing the underlying attribute.  Does not
     * wrap if the string exceeds the line.
     *
     * @param x column coordinate.  0 is the left-most column.
     * @param y row coordinate.  0 is the top-most row.
     * @param str string to draw
     */
    public void putStringXY(final int x, final int y, final String str);

    /**
     * Draw a vertical line from (x, y) to (x, y + n).
     *
     * @param x column coordinate.  0 is the left-most column.
     * @param y row coordinate.  0 is the top-most row.
     * @param n number of characters to draw
     * @param ch character to draw
     * @param attr attributes to use (bold, foreColor, backColor)
     */
    public void vLineXY(final int x, final int y, final int n,
        final char ch, final CellAttributes attr);

    /**
     * Draw a horizontal line from (x, y) to (x + n, y).
     *
     * @param x column coordinate.  0 is the left-most column.
     * @param y row coordinate.  0 is the top-most row.
     * @param n number of characters to draw
     * @param ch character to draw
     * @param attr attributes to use (bold, foreColor, backColor)
     */
    public void hLineXY(final int x, final int y, final int n,
        final char ch, final CellAttributes attr);

    /**
     * Change the width.  Everything on-screen will be destroyed and must be
     * redrawn.
     *
     * @param width new screen width
     */
    public void setWidth(final int width);

    /**
     * Change the height.  Everything on-screen will be destroyed and must be
     * redrawn.
     *
     * @param height new screen height
     */
    public void setHeight(final int height);

    /**
     * Change the width and height.  Everything on-screen will be destroyed
     * and must be redrawn.
     *
     * @param width new screen width
     * @param height new screen height
     */
    public void setDimensions(final int width, final int height);

    /**
     * Get the height.
     *
     * @return current screen height
     */
    public int getHeight();

    /**
     * Get the width.
     *
     * @return current screen width
     */
    public int getWidth();

    /**
     * Reset screen to not-bold, white-on-black.  Also flushes the offset and
     * clip variables.
     */
    public void reset();

    /**
     * Flush the offset and clip variables.
     */
    public void resetClipping();

    /**
     * Clear the logical screen.
     */
    public void clear();

    /**
     * Draw a box with a border and empty background.
     *
     * @param left left column of box.  0 is the left-most row.
     * @param top top row of the box.  0 is the top-most row.
     * @param right right column of box
     * @param bottom bottom row of the box
     * @param border attributes to use for the border
     * @param background attributes to use for the background
     */
    public void drawBox(final int left, final int top,
        final int right, final int bottom,
        final CellAttributes border, final CellAttributes background);

    /**
     * Draw a box with a border and empty background.
     *
     * @param left left column of box.  0 is the left-most row.
     * @param top top row of the box.  0 is the top-most row.
     * @param right right column of box
     * @param bottom bottom row of the box
     * @param border attributes to use for the border
     * @param background attributes to use for the background
     * @param borderType if 1, draw a single-line border; if 2, draw a
     * double-line border; if 3, draw double-line top/bottom edges and
     * single-line left/right edges (like Qmodem)
     * @param shadow if true, draw a "shadow" on the box
     */
    public void drawBox(final int left, final int top,
        final int right, final int bottom,
        final CellAttributes border, final CellAttributes background,
        final int borderType, final boolean shadow);

    /**
     * Draw a box shadow.
     *
     * @param left left column of box.  0 is the left-most row.
     * @param top top row of the box.  0 is the top-most row.
     * @param right right column of box
     * @param bottom bottom row of the box
     */
    public void drawBoxShadow(final int left, final int top,
        final int right, final int bottom);

    /**
     * Clear the physical screen.
     */
    public void clearPhysical();

    /**
     * Unset every image cell on one row of the physical screen, forcing
     * images on that row to be redrawn.
     *
     * @param y row coordinate.  0 is the top-most row.
     */
    public void unsetImageRow(final int y);

    /**
     * Classes must provide an implementation to push the logical screen to
     * the physical device.
     */
    public void flushPhysical();

    /**
     * Put the cursor at (x,y).
     *
     * @param visible if true, the cursor should be visible
     * @param x column coordinate to put the cursor on
     * @param y row coordinate to put the cursor on
     */
    public void putCursor(final boolean visible, final int x, final int y);

    /**
     * Hide the cursor.
     */
    public void hideCursor();

    /**
     * Get the cursor visibility.
     *
     * @return true if the cursor is visible
     */
    public boolean isCursorVisible();

    /**
     * Get the cursor X position.
     *
     * @return the cursor x column position
     */
    public int getCursorX();

    /**
     * Get the cursor Y position.
     *
     * @return the cursor y row position
     */
    public int getCursorY();

    /**
     * Set the window title.
     *
     * @param title the new title
     */
    public void setTitle(final String title);

}