rename epublib to book,库里面包含umd
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kunfei
@@ -0,0 +1,291 @@
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package me.ag2s.epublib.util;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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/**
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* Various String utility functions.
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* <p>
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* Most of the functions herein are re-implementations of the ones in apache
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* commons StringUtils. The reason for re-implementing this is that the
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* functions are fairly simple and using my own implementation saves the
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* inclusion of a 200Kb jar file.
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*
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* @author paul.siegmann
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*/
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public class StringUtil {
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/**
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* Changes a path containing '..', '.' and empty dirs into a path that
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* doesn't. X/foo/../Y is changed into 'X/Y', etc. Does not handle invalid
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* paths like "../".
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*
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* @param path path
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* @return the normalized path
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*/
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public static String collapsePathDots(String path) {
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String[] stringParts = path.split("/");
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List<String> parts = new ArrayList<>(Arrays.asList(stringParts));
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for (int i = 0; i < parts.size() - 1; i++) {
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String currentDir = parts.get(i);
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if (currentDir.length() == 0 || currentDir.equals(".")) {
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parts.remove(i);
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i--;
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} else if (currentDir.equals("..")) {
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parts.remove(i - 1);
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parts.remove(i - 1);
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i -= 2;
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}
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}
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StringBuilder result = new StringBuilder();
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if (path.startsWith("/")) {
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result.append('/');
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}
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for (int i = 0; i < parts.size(); i++) {
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result.append(parts.get(i));
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if (i < (parts.size() - 1)) {
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result.append('/');
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}
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}
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return result.toString();
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}
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/**
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* Whether the String is not null, not zero-length and does not contain of
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* only whitespace.
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*
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* @param text text
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* @return Whether the String is not null, not zero-length and does not contain of
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*/
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public static boolean isNotBlank(String text) {
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return !isBlank(text);
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}
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/**
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* Whether the String is null, zero-length and does contain only whitespace.
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*
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* @return Whether the String is null, zero-length and does contain only whitespace.
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*/
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public static boolean isBlank(String text) {
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if (isEmpty(text)) {
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return true;
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}
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for (int i = 0; i < text.length(); i++) {
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if (!Character.isWhitespace(text.charAt(i))) {
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return false;
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}
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}
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return true;
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}
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/**
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* Whether the given string is null or zero-length.
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*
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* @param text the input for this method
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* @return Whether the given string is null or zero-length.
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*/
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public static boolean isEmpty(String text) {
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return (text == null) || (text.length() == 0);
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}
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/**
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* Whether the given source string ends with the given suffix, ignoring
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* case.
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*
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* @param source source
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* @param suffix suffix
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* @return Whether the given source string ends with the given suffix, ignoring case.
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*/
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public static boolean endsWithIgnoreCase(String source, String suffix) {
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if (isEmpty(suffix)) {
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return true;
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}
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if (isEmpty(source)) {
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return false;
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}
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if (suffix.length() > source.length()) {
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return false;
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}
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return source.substring(source.length() - suffix.length())
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.toLowerCase().endsWith(suffix.toLowerCase());
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}
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/**
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* If the given text is null return "", the original text otherwise.
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*
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* @param text text
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* @return If the given text is null "", the original text otherwise.
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*/
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public static String defaultIfNull(String text) {
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return defaultIfNull(text, "");
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}
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/**
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* If the given text is null return "", the given defaultValue otherwise.
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*
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* @param text d
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* @param defaultValue d
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* @return If the given text is null "", the given defaultValue otherwise.
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*/
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public static String defaultIfNull(String text, String defaultValue) {
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if (text == null) {
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return defaultValue;
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}
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return text;
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}
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/**
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* Null-safe string comparator
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*
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* @param text1 d
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* @param text2 d
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* @return whether the two strings are equal
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*/
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public static boolean equals(String text1, String text2) {
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if (text1 == null) {
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return (text2 == null);
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}
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return text1.equals(text2);
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}
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/**
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* Pretty toString printer.
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*
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* @param keyValues d
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* @return a string representation of the input values
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*/
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public static String toString(Object... keyValues) {
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StringBuilder result = new StringBuilder();
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result.append('[');
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for (int i = 0; i < keyValues.length; i += 2) {
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if (i > 0) {
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result.append(", ");
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}
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result.append(keyValues[i]);
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result.append(": ");
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Object value = null;
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if ((i + 1) < keyValues.length) {
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value = keyValues[i + 1];
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}
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if (value == null) {
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result.append("<null>");
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} else {
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result.append('\'');
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result.append(value);
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result.append('\'');
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}
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}
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result.append(']');
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return result.toString();
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}
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public static int hashCode(String... values) {
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int result = 31;
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for (String value : values) {
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result ^= String.valueOf(value).hashCode();
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}
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return result;
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}
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/**
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* Gives the substring of the given text before the given separator.
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* <p>
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* If the text does not contain the given separator then the given text is
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* returned.
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*
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* @param text d
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* @param separator d
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* @return the substring of the given text before the given separator.
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*/
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public static String substringBefore(String text, char separator) {
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if (isEmpty(text)) {
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return text;
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}
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int sepPos = text.indexOf(separator);
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if (sepPos < 0) {
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return text;
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}
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return text.substring(0, sepPos);
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}
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/**
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* Gives the substring of the given text before the last occurrence of the
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* given separator.
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* <p>
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* If the text does not contain the given separator then the given text is
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* returned.
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*
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* @param text d
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* @param separator d
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* @return the substring of the given text before the last occurrence of the given separator.
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*/
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public static String substringBeforeLast(String text, char separator) {
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if (isEmpty(text)) {
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return text;
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}
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int cPos = text.lastIndexOf(separator);
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if (cPos < 0) {
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return text;
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}
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return text.substring(0, cPos);
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}
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/**
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* Gives the substring of the given text after the last occurrence of the
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* given separator.
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* <p>
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* If the text does not contain the given separator then "" is returned.
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*
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* @param text d
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* @param separator d
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* @return the substring of the given text after the last occurrence of the given separator.
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*/
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public static String substringAfterLast(String text, char separator) {
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if (isEmpty(text)) {
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return text;
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}
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int cPos = text.lastIndexOf(separator);
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if (cPos < 0) {
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return "";
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}
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return text.substring(cPos + 1);
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}
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/**
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* Gives the substring of the given text after the given separator.
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* <p>
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* If the text does not contain the given separator then "" is returned.
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*
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* @param text the input text
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* @param c the separator char
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* @return the substring of the given text after the given separator.
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*/
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public static String substringAfter(String text, char c) {
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if (isEmpty(text)) {
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return text;
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}
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int cPos = text.indexOf(c);
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if (cPos < 0) {
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return "";
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}
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return text.substring(cPos + 1);
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}
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public static String formatHtml(String text) {
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StringBuilder body = new StringBuilder();
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for (String s : text.split("\\r?\\n")) {
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s = s.replaceAll("^\\s+|\\s+$", "");
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if (s.length() > 0) {
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//段落为一张图片才认定为图片章节/漫画并启用多看单图优化，否则认定为普通文字夹杂着的图片文字。
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if (s.matches("(?i)^<img\\s([^>]+)/?>$")) {
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body.append(s.replaceAll("(?i)^<img\\s([^>]+)/?>$",
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"<div class=\"duokan-image-single\"><img class=\"picture-80\" $1/></div>"));
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} else {
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body.append("<p>").append(s).append("</p>");
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}
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}
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}
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return body.toString();
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}
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}
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