Java tutorial
package me.Wundero.Ray.utils; /* The MIT License (MIT) Copyright (c) 2016 Wundero 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. */ import com.google.common.base.Splitter; import com.google.common.collect.ImmutableList; import com.google.common.collect.Lists; import org.spongepowered.api.text.Text; import org.spongepowered.api.text.TranslatableText; import org.spongepowered.api.text.action.ClickAction; import org.spongepowered.api.text.action.HoverAction; import org.spongepowered.api.text.action.ShiftClickAction; import org.spongepowered.api.text.format.TextColors; import org.spongepowered.api.text.format.TextFormat; import org.spongepowered.api.text.format.TextStyle; import org.spongepowered.api.text.format.TextStyles; import org.spongepowered.api.text.translation.Translation; import java.util.Iterator; import java.util.List; import java.util.Locale; import java.util.Stack; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * Credit to simon816 */ class TextSplitter { private static class Format { private static final Format DEFAULTS = new Format(); public final TextFormat format; public final ClickAction<?> onClick; public final HoverAction<?> onHover; public final ShiftClickAction<?> onShiftClick; private Format() { this.format = TextFormat.of(TextColors.RESET, TextStyles.RESET); this.onClick = null; this.onHover = null; this.onShiftClick = null; } public Format(Text root) { this(DEFAULTS, root); } public Format(Format parent, Text text) { this.format = TextFormat.of( text.getColor() == TextColors.NONE ? parent.format.getColor() : text.getColor(), inheritStyle(parent.format.getStyle(), text.getStyle())); this.onClick = text.getClickAction().orElse(parent.onClick); this.onHover = text.getHoverAction().orElse(parent.onHover); this.onShiftClick = text.getShiftClickAction().orElse(parent.onShiftClick); } private static TextStyle inheritStyle(TextStyle base, TextStyle overrides) { // styles from base always exist as it must derive from DEFAULTS return new TextStyle(overrides.isBold().orElse(base.isBold().get()), overrides.isItalic().orElse(base.isItalic().get()), overrides.hasUnderline().orElse(base.hasUnderline().get()), overrides.hasStrikethrough().orElse(base.hasStrikethrough().get()), overrides.isObfuscated().orElse(base.isObfuscated().get())); } public Format with(Text text) { return new Format(this, text); } public Text.Builder applyToBuilder(Text.Builder builder) { return builder.format(this.format).onClick(this.onClick).onHover(this.onHover) .onShiftClick(this.onShiftClick); } public Text createText(String content) { return applyToBuilder(Text.builder(content)).build(); } } private static final Splitter LINE_SPLITTER = Splitter.on('\n'); private static final Pattern MARKER_PATTERN = Pattern.compile("\\$MARKER(\\d+)\\$"); public static void splitLines(Text original, List<Text> output, int maxWidth, Locale locale, boolean forceUnicode) { if (maxWidth < 1) { throw new IllegalArgumentException("Max width must be at least 1, was " + maxWidth); } Stack<Format> formatStack = new Stack<>(); Object[] ret = apply(0, Text.builder(), formatStack, original, output, maxWidth, locale, forceUnicode); output.add(((Text.Builder) ret[1]).build()); } private static Object[] apply(int currLineLength, Text.Builder currLineBuilder, Stack<Format> formatStack, Text text, List<Text> output, int maxWidth, Locale locale, boolean forceUnicode) { if (text instanceof TranslatableText) { text = transformTranslationText((TranslatableText) text, locale); } Format format = pushFormat(formatStack, text); String plainText = text.toPlainSingle(); List<String> lines = LINE_SPLITTER.splitToList(plainText); boolean first = true; String next = null; for (int i = 0; next != null || i < lines.size(); i++) { String line; if (next != null) { line = next; next = null; i--; } else { line = lines.get(i); } if (!first) { output.add(currLineBuilder.build()); currLineBuilder = Text.builder(); currLineLength = 0; } first = false; if (line.isEmpty()) { continue; } boolean isBold = format.format.getStyle().isBold().get(); int lineW = TextUtils.getStringWidth(line, isBold, forceUnicode); if (currLineLength + lineW > maxWidth) { String[] trimmed = trimToMaxWidth(line, isBold, maxWidth - currLineLength, forceUnicode); line = trimmed[0]; if (currLineLength == 0 && line.isEmpty()) { // Cannot fit this within the maxWidth break; // give up } lineW = TextUtils.getStringWidth(line, isBold, forceUnicode); next = trimmed[1]; } currLineLength += lineW; currLineBuilder.append(format.createText(line)); } for (Text child : text.getChildren()) { Object[] ret = apply(currLineLength, currLineBuilder, formatStack, child, output, maxWidth, locale, forceUnicode); currLineLength = (Integer) ret[0]; currLineBuilder = (Text.Builder) ret[1]; } formatStack.pop(); return new Object[] { currLineLength, currLineBuilder }; } private static Format pushFormat(Stack<Format> formatStack, Text text) { Format format; if (formatStack.isEmpty()) { format = new Format(text); } else { format = formatStack.peek().with(text); } formatStack.push(format); return format; } // Transforms a TranslatableText into a LiteralText private static Text transformTranslationText(TranslatableText text, Locale locale) { // This is bad, don't look Translation translation = text.getTranslation(); ImmutableList<Object> arguments = text.getArguments(); Object[] markers = new Object[arguments.size()]; for (int i = 0; i < markers.length; i++) { markers[i] = "$MARKER" + i + "$"; } String patched = translation.get(locale, markers); List<Object> sections = Lists.newArrayList(); Matcher m = MARKER_PATTERN.matcher(patched); int prevPos = 0; while (m.find()) { if (m.start() != prevPos) { sections.add(patched.substring(prevPos, m.start())); } int index = Integer.parseInt(m.group(1)); sections.add(arguments.get(index)); prevPos = m.end(); } if (prevPos != patched.length() - 1) { sections.add(patched.substring(prevPos)); } Text.Builder builder = new Format(text).applyToBuilder(Text.builder()); for (Object val : sections) { builder.append(Text.of(val)); } builder.append(text.getChildren()); return builder.build(); } private static String[] trimToMaxWidth(String text, boolean bold, int maxWidth, boolean forceUnicode) { int currLen = 0; int pos = 0; while (currLen < maxWidth && pos < text.length()) { currLen += TextUtils.getWidth(text.charAt(pos++), bold, forceUnicode); } if (currLen > maxWidth) { pos--; } return new String[] { text.substring(0, pos), text.substring(pos) }; } public static void splitLines(String original, List<String> output, int maxWidth, boolean forceUnicode) { String next = null; Iterator<String> iterator = LINE_SPLITTER.split(original).iterator(); int currLineWidth = 0; while (iterator.hasNext() || next != null) { String part = next != null ? next : iterator.next(); next = null; int partW = TextUtils.getStringWidth(part, false, forceUnicode); if (partW + currLineWidth > maxWidth) { String[] trimmed = trimToMaxWidth(part, false, maxWidth - currLineWidth, forceUnicode); part = trimmed[0]; if (currLineWidth == 0 && part.isEmpty()) { break; } next = trimmed[1]; partW = TextUtils.getStringWidth(part, false, forceUnicode); currLineWidth = 0; } else { currLineWidth += partW; } output.add(part); } } /* public static void split(String original, List<String> output, Iterator<String> iterator, Strategy strategy) { strategy.init(); String next = null; while (iterator.hasNext() || next != null) { String part = next != null ? next : iterator.next(); String[] nextArr = new String[1]; part = strategy.apply(part, nextArr); next = nextArr[0]; if (part == null) { break; } output.add(part); } } private static class MaxWidthStrategy implements Strategy { private int currLineWidth; private final int maxWidth; public MaxWidthStrategy(int width) { this.maxWidth = width; } @Override public void init() { this.currLineWidth = 0; } @Override public String apply(String part, String[] nextRef) { int partW = TextUtils.getStringWidth(part, false); if (partW + this.currLineWidth > this.maxWidth) { String[] trimmed = trimToMaxWidth(part, false, this.maxWidth - this.currLineWidth); part = trimmed[0]; if (this.currLineWidth == 0 && part.isEmpty()) { return null; } nextRef[0] = trimmed[1]; this.currLineWidth = 0; } else { this.currLineWidth += partW; } return part; } } private interface Strategy { void init(); String apply(String part, String[] nextRef); } */ }