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https://github.com/curioustorvald/Terrarum.git
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added sources for Slick
Former-commit-id: 1647fa32ef6894bd7db44f741f07c2f4dcdf9054 Former-commit-id: 0e5810dcfbe1fd59b13e7cabe9f1e93c5542da2d
This commit is contained in:
Song Minjae
220
lib/slick-source/org/newdawn/slick/util/FontUtils.java
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lib/slick-source/org/newdawn/slick/util/FontUtils.java
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package org.newdawn.slick.util;
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import java.awt.Graphics2D;
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import org.newdawn.slick.Color;
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import org.newdawn.slick.Font;
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/**
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* Simple utility class to support justified text
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*
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* http://slick.javaunlimited.net/viewtopic.php?t=2640
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*
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* @author zenzei
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*/
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public class FontUtils {
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/**
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* Alignment indicators
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*/
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public class Alignment {
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/** Left alignment */
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public static final int LEFT = 1;
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/** Center alignment */
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public static final int CENTER = 2;
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/** Right alignment */
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public static final int RIGHT = 3;
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/** Justify alignment */
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public static final int JUSTIFY = 4;
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}
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/**
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* Draw text left justified
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*
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* @param font The font to draw with
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* @param s The string to draw
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* @param x The x location to draw at
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* @param y The y location to draw at
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*/
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public static void drawLeft(Font font, String s, int x, int y) {
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drawString(font, s, Alignment.LEFT, x, y, 0, Color.white);
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}
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/**
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* Draw text center justified
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*
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* @param font The font to draw with
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* @param s The string to draw
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* @param x The x location to draw at
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* @param y The y location to draw at
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* @param width The width to fill with the text
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*/
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public static void drawCenter(Font font, String s, int x, int y, int width) {
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drawString(font, s, Alignment.CENTER, x, y, width, Color.white);
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}
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/**
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* Draw text center justified
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*
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* @param font The font to draw with
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* @param s The string to draw
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* @param x The x location to draw at
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* @param y The y location to draw at
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* @param width The width to fill with the text
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* @param color The color to draw in
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*/
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public static void drawCenter(Font font, String s, int x, int y, int width,
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Color color) {
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drawString(font, s, Alignment.CENTER, x, y, width, color);
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}
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/**
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* Draw text right justified
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*
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* @param font The font to draw with
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* @param s The string to draw
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* @param x The x location to draw at
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* @param y The y location to draw at
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* @param width The width to fill with the text
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*/
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public static void drawRight(Font font, String s, int x, int y, int width) {
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drawString(font, s, Alignment.RIGHT, x, y, width, Color.white);
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}
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/**
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* Draw text right justified
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*
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* @param font The font to draw with
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* @param s The string to draw
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* @param x The x location to draw at
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* @param y The y location to draw at
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* @param width The width to fill with the text
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* @param color The color to draw in
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*/
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public static void drawRight(Font font, String s, int x, int y, int width,
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Color color) {
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drawString(font, s, Alignment.RIGHT, x, y, width, color);
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}
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/**
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* Draw a string
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*
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* @param font The font to draw with
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* @param s The text to draw
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* @param alignment The alignment to apply
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* @param x The x location to draw at
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* @param y The y location to draw at
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* @param width The width to fill with the string
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* @param color The color to draw in
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* @return The final x coordinate of the text
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*/
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public static final int drawString(Font font, final String s,
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final int alignment, final int x, final int y, final int width,
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Color color) {
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int resultingXCoordinate = 0;
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if (alignment == Alignment.LEFT) {
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font.drawString(x, y, s, color);
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} else if (alignment == Alignment.CENTER) {
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font.drawString(x + (width / 2) - (font.getWidth(s) / 2), y, s,
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color);
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} else if (alignment == Alignment.RIGHT) {
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font.drawString(x + width - font.getWidth(s), y, s, color);
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} else if (alignment == Alignment.JUSTIFY) {
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// calculate left width
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int leftWidth = width - font.getWidth(s);
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if (leftWidth <= 0) {
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// no width left, use standard draw string
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font.drawString(x, y, s, color);
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}
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return FontUtils.drawJustifiedSpaceSeparatedSubstrings(font, s, x,
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y, FontUtils.calculateWidthOfJustifiedSpaceInPixels(font,
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s, leftWidth));
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}
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return resultingXCoordinate;
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}
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/**
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* Calculates and returns the width of a single justified space for the
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* given {@link String}, in pixels.
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*
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* @param font The font to draw with
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* @param s
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* The given non-null {@link String} to use to calculate the
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* width of a space for.
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* @param leftWidth
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* The integer specifying the left width buffer to use to
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* calculate how much space a space should take up in
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* justification.
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* @return The width of a single justified space for the given
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* {@link String}, in pixels.
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*/
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private static int calculateWidthOfJustifiedSpaceInPixels(final Font font,
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final String s, final int leftWidth) {
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int space = 0; // hold total space; hold space width in pixel
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int curpos = 0; // current string position
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// count total space
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while (curpos < s.length()) {
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if (s.charAt(curpos++) == ' ') {
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space++;
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}
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}
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if (space > 0) {
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// width left plus with total space
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// space width (in pixel) = width left / total space
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space = (leftWidth + (font.getWidth(" ") * space)) / space;
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}
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return space;
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}
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/**
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* Draws justified-space separated substrings based on the given
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* {@link String} and the given starting x and y coordinates to the given
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* {@link Graphics2D} instance.
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*
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* @param font
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* The font to draw with
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* @param s
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* The non-null {@link String} to draw as space-separated
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* substrings.
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* @param x
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* The given starting x-coordinate position to use to draw the
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* {@link String}.
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* @param y
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* The given starting y-coordinate position to use to draw the
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* {@link String}.
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* @param justifiedSpaceWidth
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* The integer specifying the width of a justified space
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* {@link String}, in pixels.
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* @return The resulting x-coordinate of the current cursor after the
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* drawing operation completes.
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* @throws NullPointerException
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* Throws a {@link NullPointerException} if any of the given
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* arguments are null.
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*/
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private static int drawJustifiedSpaceSeparatedSubstrings(Font font,
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final String s, final int x, final int y,
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final int justifiedSpaceWidth) {
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int curpos = 0;
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int endpos = 0;
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int resultingXCoordinate = x;
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while (curpos < s.length()) {
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endpos = s.indexOf(' ', curpos); // find space
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if (endpos == -1) {
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endpos = s.length(); // no space, draw all string directly
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}
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String substring = s.substring(curpos, endpos);
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font.drawString(resultingXCoordinate, y, substring);
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resultingXCoordinate += font.getWidth(substring)
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+ justifiedSpaceWidth; // increase
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// x-coordinate
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curpos = endpos + 1;
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}
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return resultingXCoordinate;
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}
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}
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