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static byte[] decode_base64(String s, int maxolen) throws IllegalArgumentException { ByteArrayOutputStream out = new ByteArrayOutputStream(maxolen); int off = 0, slen = s.length(), olen = 0; byte c1, c2, c3, c4, o; if (maxolen <= 0) { throw new IllegalArgumentException("Invalid maxolen"); } while (off < slen - 1 && olen < maxolen) { c1 = char64(s.charAt(off++)); c2 = char64(s.charAt(off++)); if (c1 == -1 || c2 == -1) { break; } o = (byte) (c1 << 2); o |= (c2 & 0x30) >> 4; out.write(o); if (++olen >= maxolen || off >= slen) { break; } c3 = char64(s.charAt(off++)); if (c3 == -1) { break; } o = (byte) ((c2 & 0x0f) << 4); o |= (c3 & 0x3c) >> 2; out.write(o); if (++olen >= maxolen || off >= slen) { break; } c4 = char64(s.charAt(off++)); o = (byte) ((c3 & 0x03) << 6); o |= c4; out.write(o); ++olen; } return out.toByteArray(); }
Decode a string encoded using bcrypt's base64 scheme to a byte array. Note that this is *not* compatible with the standard MIME-base64 encoding. @param s the string to decode @param maxolen the maximum number of bytes to decode @return an array containing the decoded bytes @throws IllegalArgumentException if maxolen is invalid
decode_base64
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/security/BCrypt.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/security/BCrypt.java
MIT
private final void encipher(int lr[], int off) { int i, n, l = lr[off], r = lr[off + 1]; l ^= P[0]; for (i = 0; i <= BLOWFISH_NUM_ROUNDS - 2;) { // Feistel substitution on left word n = S[(l >> 24) & 0xff]; n += S[0x100 | ((l >> 16) & 0xff)]; n ^= S[0x200 | ((l >> 8) & 0xff)]; n += S[0x300 | (l & 0xff)]; r ^= n ^ P[++i]; // Feistel substitution on right word n = S[(r >> 24) & 0xff]; n += S[0x100 | ((r >> 16) & 0xff)]; n ^= S[0x200 | ((r >> 8) & 0xff)]; n += S[0x300 | (r & 0xff)]; l ^= n ^ P[++i]; } lr[off] = r ^ P[BLOWFISH_NUM_ROUNDS + 1]; lr[off + 1] = l; }
Blowfish encipher a single 64-bit block encoded as two 32-bit halves @param lr an array containing the two 32-bit half blocks @param off the position in the array of the blocks
encipher
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/security/BCrypt.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/security/BCrypt.java
MIT
private static int streamtoword(byte data[], int offp[]) { int i; int word = 0; int off = offp[0]; for (i = 0; i < 4; i++) { word = (word << 8) | (data[off] & 0xff); off = (off + 1) % data.length; } offp[0] = off; return word; }
Cycically extract a word of key material @param data the string to extract the data from @param offp a "pointer" (as a one-entry array) to the current offset into data @return the next word of material from data
streamtoword
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/security/BCrypt.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/security/BCrypt.java
MIT
private void key(byte key[]) { int i; int koffp[] = {0}; int lr[] = {0, 0}; int plen = P.length, slen = S.length; for (i = 0; i < plen; i++) { P[i] = P[i] ^ streamtoword(key, koffp); } for (i = 0; i < plen; i += 2) { encipher(lr, 0); P[i] = lr[0]; P[i + 1] = lr[1]; } for (i = 0; i < slen; i += 2) { encipher(lr, 0); S[i] = lr[0]; S[i + 1] = lr[1]; } }
Key the Blowfish cipher @param key an array containing the key
key
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/security/BCrypt.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/security/BCrypt.java
MIT
private byte[] crypt_raw(byte password[], byte salt[], int log_rounds) { int cdata[] = bf_crypt_ciphertext.clone(); int clen = cdata.length; byte ret[]; long rounds = roundsForLogRounds(log_rounds); init_key(); ekskey(salt, password); for (long i = 0; i < rounds; i++) { key(password); key(salt); } for (int i = 0; i < 64; i++) { for (int j = 0; j < (clen >> 1); j++) { encipher(cdata, j << 1); } } ret = new byte[clen * 4]; for (int i = 0, j = 0; i < clen; i++) { ret[j++] = (byte) ((cdata[i] >> 24) & 0xff); ret[j++] = (byte) ((cdata[i] >> 16) & 0xff); ret[j++] = (byte) ((cdata[i] >> 8) & 0xff); ret[j++] = (byte) (cdata[i] & 0xff); } return ret; }
Perform the central password hashing step in the bcrypt scheme @param password the password to hash @param salt the binary salt to hash with the password @param log_rounds the binary logarithm of the number of rounds of hashing to apply @return an array containing the binary hashed password
crypt_raw
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/security/BCrypt.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/security/BCrypt.java
MIT
public static String gensalt(int log_rounds, SecureRandom random) { if (log_rounds < 4 || log_rounds > 31) { throw new IllegalArgumentException("Bad number of rounds"); } StringBuilder rs = new StringBuilder(); byte rnd[] = new byte[BCRYPT_SALT_LEN]; random.nextBytes(rnd); rs.append("$2a$"); if (log_rounds < 10) { rs.append("0"); } rs.append(log_rounds); rs.append("$"); encode_base64(rnd, rnd.length, rs); return rs.toString(); }
Generate a salt for use with the BCrypt.hashpw() method @param log_rounds the log2 of the number of rounds of hashing to apply - the work factor therefore increases as 2**log_rounds. @param random an instance of SecureRandom to use @return an encoded salt value
gensalt
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/security/BCrypt.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/security/BCrypt.java
MIT
public static String gensalt(int log_rounds) { return gensalt(log_rounds, new SecureRandom()); }
Generate a salt for use with the BCrypt.hashpw() method @param log_rounds the log2 of the number of rounds of hashing to apply - the work factor therefore increases as 2**log_rounds. @return an encoded salt value
gensalt
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/security/BCrypt.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/security/BCrypt.java
MIT
public static String gensalt() { return gensalt(GENSALT_DEFAULT_LOG2_ROUNDS); }
Generate a salt for use with the BCrypt.hashpw() method, selecting a reasonable default for the number of hashing rounds to apply @return an encoded salt value
gensalt
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/security/BCrypt.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/security/BCrypt.java
MIT
private static String getPropertyName(String accessorSuffix) { char[] chars = accessorSuffix.toCharArray(); if (chars[0] != '_') { Preconditions.checkArgument(Character.isUpperCase(chars[0])); chars[0] = Character.toLowerCase(chars[0]); return new String(chars); } else { return accessorSuffix; } }
Get property name given its accessor method name suffix. For instance, accessor suffix &quot;Value&quot; will return property name of &quot;value&quot;. Note that if accessor suffix starts with underscore, the property name will be the same as accessor suffix. @param accessorSuffix name suffix of the getter method of the property @return property name corresponding to specified accessor suffix
getPropertyName
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/BeanUtils.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/BeanUtils.java
MIT
public static Method getGetter(Class<?> clazz, String propertyName) { Method getter = findGetter(clazz, propertyName); if (getter == null) { throw new RuntimeException(String.format("Getter not found (class: %s, property: %s)", clazz.getName(), propertyName)); } return getter; }
Find getter method by property name in specified class and super classes. @param clazz class to search getter method. All super classes will also be searched if not found in current class @param propertyName name of the property to search getter for @return getter method @throws RuntimeException if not found in class hierarchy
getGetter
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/BeanUtils.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/BeanUtils.java
MIT
public static String getPropertyName(Method getter) { if (getter.getName().startsWith("get")) { return getPropertyName(getter.getName().substring(3)); } else if (getter.getName().startsWith("is")) { return getPropertyName(getter.getName().substring(2)); } else { throw new RuntimeException(String.format("Not recognized getter method (class: %s, method: %s)", getter.getDeclaringClass().getName(), getter.getName())); } }
Get property name associated with the getter method. @param getter getter method to retrieve property name from @return property name associated with the getter method @throws RuntimeException if specified method is not a getter method
getPropertyName
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/BeanUtils.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/BeanUtils.java
MIT
public static <T> List<Class<?>> getTypeArguments(Class<T> baseClass, Class<? extends T> childClass) { Preconditions.checkArgument(!baseClass.isInterface(), "baseClass should not be an interface"); Preconditions.checkArgument(baseClass.isAssignableFrom(childClass), "childClass should be a sub class of baseClass"); Map<Type, Type> resolvedTypes = new HashMap<Type, Type>(); Type type = childClass; // start walking up the inheritance hierarchy until we hit baseClass while (!getClass(type).equals(baseClass)) { if (type instanceof Class) { // there is no useful information for us in raw types, so just // keep going. type = ((Class<?>) type).getGenericSuperclass(); } else { ParameterizedType parameterizedType = (ParameterizedType) type; Class<?> rawType = (Class<?>) parameterizedType.getRawType(); Type[] actualTypeArguments = parameterizedType .getActualTypeArguments(); TypeVariable<?>[] typeParameters = rawType.getTypeParameters(); for (int i = 0; i < actualTypeArguments.length; i++) { resolvedTypes .put(typeParameters[i], actualTypeArguments[i]); } if (!rawType.equals(baseClass)) { type = rawType.getGenericSuperclass(); } } } // finally, for each actual type argument provided to baseClass, // determine (if possible) // the raw class for that type argument. Type[] actualTypeArguments; if (type instanceof Class) { actualTypeArguments = ((Class<?>) type).getTypeParameters(); } else { actualTypeArguments = ((ParameterizedType) type) .getActualTypeArguments(); } List<Class<?>> typeArgumentsAsClasses = new ArrayList<Class<?>>(); // resolve types by chasing down type variables. for (Type baseType : actualTypeArguments) { while (resolvedTypes.containsKey(baseType)) { baseType = resolvedTypes.get(baseType); } typeArgumentsAsClasses.add(getClass(baseType)); } return typeArgumentsAsClasses; }
Get the actual type arguments a child class has used to extend a generic base class.<p> (Taken from http://www.artima.com/weblogs/viewpost.jsp?thread=208860. Thanks mathieu.grenonville for finding this solution!) <p> @param baseClass the base class @param childClass the child class @return a list of the raw classes for the actual type arguments.
getTypeArguments
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
MIT
@Nullable public static Class<?> getClass(Type type) { if (type instanceof Class) { return (Class<?>) type; } else if (type instanceof ParameterizedType) { return getClass(((ParameterizedType) type).getRawType()); } else if (type instanceof GenericArrayType) { Type componentType = ((GenericArrayType) type) .getGenericComponentType(); Class<?> componentClass = getClass(componentType); if (componentClass != null) { return Array.newInstance(componentClass, 0).getClass(); } else { return null; } } else { return null; } }
Get the underlying class for a type. <p> @param type the type to get class from @return the underlying class, or <tt>null</tt> if the type is a variable type
getClass
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
MIT
public static Method findMethod(Class<?> clazz, String methodName, Class<?>... paramTypes) { Class<?> current = clazz; while (true) { try { return current.getDeclaredMethod(methodName, paramTypes); } catch (SecurityException e) { throw new RuntimeException(e); } catch (NoSuchMethodException e) { // ignore } if (current == Object.class) break; current = current.getSuperclass(); } return null; }
Find method of specified name and parameter types in specified class and its super classes in turn. <p> @param clazz class to find method in. Super classes will be searched for the method if not found in current class @param methodName method name to find @param paramTypes parameter types to find @return method matching specified name and parameter types. Or <tt>null</tt> if not found
findMethod
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
MIT
public static Field findField(Class<?> clazz, String fieldName) { Field field = null; Class<?> current = clazz; while (current != null) { for (Field declaredField: current.getDeclaredFields()) { if (!Modifier.isStatic(declaredField.getModifiers()) && fieldName.equals(declaredField.getName())) { field = declaredField; break; } } current = current.getSuperclass(); } return field; }
Find non-static field in specified class hierarchy with specified name. <p> @param clazz class to search non-static field in. All the super classes will also be consulted if not found in sub class @param fieldName name of the field to search for @return found non-static field, or <tt>null</tt> if not found
findField
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
MIT
public static List<Field> findFields(Class<?> clazz) { Map<String, Field> fields = new LinkedHashMap<String, Field>(); Class<?> current = clazz; while (current != null) { for (Field field: current.getDeclaredFields()) { if (!Modifier.isStatic(field.getModifiers()) && !field.isSynthetic() && !fields.containsKey(field.getName())) { fields.put(field.getName(), field); } } current = current.getSuperclass(); } return new ArrayList<Field>(fields.values()); }
Find all non-static fields in specified class and all its super classes. If a non-static field declared in sub class has the same name as another non-static field declared in super class, only the non-static field in sub class will be returned. <p> @param clazz the class to find non-static fields. All its super classes will also be consulted @return list of found non-static fields, with non-static fields belonging to sub classes coming first
findFields
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
MIT
public static Method getMethod(Class<?> clazz, String methodName, Class<?>...paramTypes) { Method method = findMethod(clazz, methodName, paramTypes); if (method == null) { throw new RuntimeException("Can not find method named '" + methodName + "' in class hierarchy of '" + clazz.getName() + "'."); } else { return method; } }
Get declared method in specified class and super classes. <p> @param clazz clazz to search the method. If not found, its super classes will also be searched @param methodName name of the method to find @param paramTypes parameter types of the method to find @return method matching specified name and parameter types @throws RuntimeException if the method can not be found
getMethod
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
MIT
public static Object invokeStaticMethod(Class<?> clazz, String methodName, Object...params) { Class<?>[] paramTypes = new Class<?>[params.length]; for (int i = 0; i < params.length; i++) paramTypes[i] = params[i].getClass(); Method method = getMethod(clazz, methodName, paramTypes); if (!Modifier.isStatic(method.getModifiers())) { throw new RuntimeException("Method '" + methodName + "' should be a static method."); } method.setAccessible(true); try { return method.invoke(null, params); } catch (Exception e) { throw ExceptionUtils.unchecked(e); } }
Invoke specified static method with specified parameters. Parameter types of invoked static method should be compatible with types of specified parameters. The static method will be searched in specified class and all its super classes in turn. <p> @param clazz class to invoke static method in. Static method will be searched in super classes if not found in specified class @param methodName name of the static method @param params parameters to be passed to the static method @return return value of invoked static method @throws RuntimeException if no static method matching specified name and parameters
invokeStaticMethod
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
MIT
public static Object invokeMethod(Object object, String methodName, Object...params) { Class<?>[] paramTypes = new Class<?>[params.length]; for (int i = 0; i < params.length; i++) paramTypes[i] = params[i].getClass(); Method method = getMethod(object.getClass(), methodName, paramTypes); if (Modifier.isStatic(method.getModifiers())) { throw new RuntimeException("Method '" + methodName + "' should not be a static method."); } method.setAccessible(true); try { return method.invoke(object, params); } catch (Exception e) { throw ExceptionUtils.unchecked(e); } }
Invoke specified method with specified parameters. Parameter types of invoked method should be compatible with types of specified parameters. The method will be searched in specified class and all its super classes in turn. <p> @param clazz class to invoke method in. Method will be searched in super classes if not found in specified class @param methodName name of the method @param params parameters to be passed to the method @return return value of invoked method @throws RuntimeException if no method matching specified name and parameters
invokeMethod
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
MIT
public static <T> T instantiateClass(Class<T> clazz, Object... params) { Class<?>[] paramTypes = new Class<?>[params.length]; for (int i = 0; i < params.length; i++) paramTypes[i] = params[i].getClass(); Constructor<T> constructor = findConstructor(clazz, paramTypes); if (constructor == null) { StringBuilder sb = new StringBuilder(); if (paramTypes.length > 0) { for (Class<?> type : paramTypes) sb.append(type).append(", "); } throw new RuntimeException("Unable to find constructor for " + clazz + " with param type: " + sb.toString()); } try { return constructor.newInstance(params); } catch (Exception e) { throw ExceptionUtils.unchecked(e); } }
Instantiate specified class with specified parameters. The constructor used for instantiation should match types of specified parameters. <p> @param clazz class to be instantiated @param params parameters passed to constructor @return instance of the class @throws RuntimeException if constructor with parameter types matching specified parameters can not be found
instantiateClass
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/ReflectionUtils.java
MIT
public boolean hasBuildMeta(String tag) { for (String s : buildMeta) { if (s.equals(tag)) { return true; } } return false; }
Check if this version has a given build Meta tags. @param tag the tag to check for. @return true if the tag is found in {@link SemanticVersion#buildMeta}.
hasBuildMeta
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/SemanticVersion.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/SemanticVersion.java
MIT
public boolean hasPreRelease(String tag) { for (String s : preRelease) { if (s.equals(tag)) { return true; } } return false; }
Check if this version has a given pre release tag. @param tag the tag to check for @return true if the tag is found in {@link SemanticVersion#preRelease}.
hasPreRelease
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/SemanticVersion.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/SemanticVersion.java
MIT
public String[] getPreRelease() { String[] ret = new String[preRelease.length]; System.arraycopy(preRelease, 0, ret, 0, ret.length); return ret; }
Get the pre release tags @return a potentially empty array, but never null.
getPreRelease
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/SemanticVersion.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/SemanticVersion.java
MIT
public String[] getBuildMeta() { String ret[] = new String[buildMeta.length]; System.arraycopy(buildMeta, 0, ret, 0, ret.length); return ret; }
Get the build meta tags @return a potentially empty array, but never null.
getBuildMeta
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/SemanticVersion.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/SemanticVersion.java
MIT
public boolean isUpdateFor(SemanticVersion v) { return compareTo(v) > 0; }
Convenience method to check if this version is an update. @param v the other version object @return true if this version is newer than the other one.
isUpdateFor
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/SemanticVersion.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/SemanticVersion.java
MIT
public boolean isCompatibleUpdateFor(SemanticVersion v) { return isUpdateFor(v) && (major == v.major) && (major != 0 || v.major != 0); }
Convenience method to check if this version is a compatible update. @param v the other version object. @return true if this version is newer and both have the same major version.
isCompatibleUpdateFor
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/SemanticVersion.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/SemanticVersion.java
MIT
public LinkedList<Diff> diff_main(String text1, String text2) { return diff_main(text1, text2, true); }
Find the differences between two texts. Run a faster, slightly less optimal diff. This method allows the 'checklines' of diff_main() to be optional. Most of the time checklines is wanted, so default to true. @param text1 Old string to be diffed. @param text2 New string to be diffed. @return Linked List of Diff objects.
diff_main
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public LinkedList<Diff> diff_main(String text1, String text2, boolean checklines) { // Set a deadline by which time the diff must be complete. long deadline; if (Diff_Timeout <= 0) { deadline = Long.MAX_VALUE; } else { deadline = System.currentTimeMillis() + (long) (Diff_Timeout * 1000); } return diff_main(text1, text2, checklines, deadline); }
Find the differences between two texts. @param text1 Old string to be diffed. @param text2 New string to be diffed. @param checklines Speedup flag. If false, then don't run a line-level diff first to identify the changed areas. If true, then run a faster slightly less optimal diff. @return Linked List of Diff objects.
diff_main
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
private LinkedList<Diff> diff_main(String text1, String text2, boolean checklines, long deadline) { // Check for null inputs. if (text1 == null || text2 == null) { throw new IllegalArgumentException("Null inputs. (diff_main)"); } // Check for equality (speedup). LinkedList<Diff> diffs; if (text1.equals(text2)) { diffs = new LinkedList<Diff>(); if (text1.length() != 0) { diffs.add(new Diff(Operation.EQUAL, text1)); } return diffs; } // Trim off common prefix (speedup). int commonlength = diff_commonPrefix(text1, text2); String commonprefix = text1.substring(0, commonlength); text1 = text1.substring(commonlength); text2 = text2.substring(commonlength); // Trim off common suffix (speedup). commonlength = diff_commonSuffix(text1, text2); String commonsuffix = text1.substring(text1.length() - commonlength); text1 = text1.substring(0, text1.length() - commonlength); text2 = text2.substring(0, text2.length() - commonlength); // Compute the diff on the middle block. diffs = diff_compute(text1, text2, checklines, deadline); // Restore the prefix and suffix. if (commonprefix.length() != 0) { diffs.addFirst(new Diff(Operation.EQUAL, commonprefix)); } if (commonsuffix.length() != 0) { diffs.addLast(new Diff(Operation.EQUAL, commonsuffix)); } diff_cleanupMerge(diffs); return diffs; }
Find the differences between two texts. Simplifies the problem by stripping any common prefix or suffix off the texts before diffing. @param text1 Old string to be diffed. @param text2 New string to be diffed. @param checklines Speedup flag. If false, then don't run a line-level diff first to identify the changed areas. If true, then run a faster slightly less optimal diff. @param deadline Time when the diff should be complete by. Used internally for recursive calls. Users should set DiffTimeout instead. @return Linked List of Diff objects.
diff_main
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
private LinkedList<Diff> diff_compute(String text1, String text2, boolean checklines, long deadline) { LinkedList<Diff> diffs = new LinkedList<Diff>(); if (text1.length() == 0) { // Just add some text (speedup). diffs.add(new Diff(Operation.INSERT, text2)); return diffs; } if (text2.length() == 0) { // Just delete some text (speedup). diffs.add(new Diff(Operation.DELETE, text1)); return diffs; } String longtext = text1.length() > text2.length() ? text1 : text2; String shorttext = text1.length() > text2.length() ? text2 : text1; int i = longtext.indexOf(shorttext); if (i != -1) { // Shorter text is inside the longer text (speedup). Operation op = (text1.length() > text2.length()) ? Operation.DELETE : Operation.INSERT; diffs.add(new Diff(op, longtext.substring(0, i))); diffs.add(new Diff(Operation.EQUAL, shorttext)); diffs.add(new Diff(op, longtext.substring(i + shorttext.length()))); return diffs; } if (shorttext.length() == 1) { // Single character string. // After the previous speedup, the character can't be an equality. diffs.add(new Diff(Operation.DELETE, text1)); diffs.add(new Diff(Operation.INSERT, text2)); return diffs; } // Check to see if the problem can be split in two. String[] hm = diff_halfMatch(text1, text2); if (hm != null) { // A half-match was found, sort out the return data. String text1_a = hm[0]; String text1_b = hm[1]; String text2_a = hm[2]; String text2_b = hm[3]; String mid_common = hm[4]; // Send both pairs off for separate processing. LinkedList<Diff> diffs_a = diff_main(text1_a, text2_a, checklines, deadline); LinkedList<Diff> diffs_b = diff_main(text1_b, text2_b, checklines, deadline); // Merge the results. diffs = diffs_a; diffs.add(new Diff(Operation.EQUAL, mid_common)); diffs.addAll(diffs_b); return diffs; } if (checklines && text1.length() > 100 && text2.length() > 100) { return diff_lineMode(text1, text2, deadline); } return diff_bisect(text1, text2, deadline); }
Find the differences between two texts. Assumes that the texts do not have any common prefix or suffix. @param text1 Old string to be diffed. @param text2 New string to be diffed. @param checklines Speedup flag. If false, then don't run a line-level diff first to identify the changed areas. If true, then run a faster slightly less optimal diff. @param deadline Time when the diff should be complete by. @return Linked List of Diff objects.
diff_compute
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
private LinkedList<Diff> diff_lineMode(String text1, String text2, long deadline) { // Scan the text on a line-by-line basis first. LinesToCharsResult b = diff_linesToChars(text1, text2); text1 = b.chars1; text2 = b.chars2; List<String> linearray = b.lineArray; LinkedList<Diff> diffs = diff_main(text1, text2, false, deadline); // Convert the diff back to original text. diff_charsToLines(diffs, linearray); // Eliminate freak matches (e.g. blank lines) diff_cleanupSemantic(diffs); // Rediff any replacement blocks, this time character-by-character. // Add a dummy entry at the end. diffs.add(new Diff(Operation.EQUAL, "")); int count_delete = 0; int count_insert = 0; String text_delete = ""; String text_insert = ""; ListIterator<Diff> pointer = diffs.listIterator(); Diff thisDiff = pointer.next(); while (thisDiff != null) { switch (thisDiff.operation) { case INSERT: count_insert++; text_insert += thisDiff.text; break; case DELETE: count_delete++; text_delete += thisDiff.text; break; case EQUAL: // Upon reaching an equality, check for prior redundancies. if (count_delete >= 1 && count_insert >= 1) { // Delete the offending records and add the merged ones. pointer.previous(); for (int j = 0; j < count_delete + count_insert; j++) { pointer.previous(); pointer.remove(); } for (Diff newDiff : diff_main(text_delete, text_insert, false, deadline)) { pointer.add(newDiff); } } count_insert = 0; count_delete = 0; text_delete = ""; text_insert = ""; break; } thisDiff = pointer.hasNext() ? pointer.next() : null; } diffs.removeLast(); // Remove the dummy entry at the end. return diffs; }
Do a quick line-level diff on both strings, then rediff the parts for greater accuracy. This speedup can produce non-minimal diffs. @param text1 Old string to be diffed. @param text2 New string to be diffed. @param deadline Time when the diff should be complete by. @return Linked List of Diff objects.
diff_lineMode
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
protected LinkedList<Diff> diff_bisect(String text1, String text2, long deadline) { // Cache the text lengths to prevent multiple calls. int text1_length = text1.length(); int text2_length = text2.length(); int max_d = (text1_length + text2_length + 1) / 2; int v_offset = max_d; int v_length = 2 * max_d; int[] v1 = new int[v_length]; int[] v2 = new int[v_length]; for (int x = 0; x < v_length; x++) { v1[x] = -1; v2[x] = -1; } v1[v_offset + 1] = 0; v2[v_offset + 1] = 0; int delta = text1_length - text2_length; // If the total number of characters is odd, then the front path will // collide with the reverse path. boolean front = (delta % 2 != 0); // Offsets for start and end of k loop. // Prevents mapping of space beyond the grid. int k1start = 0; int k1end = 0; int k2start = 0; int k2end = 0; for (int d = 0; d < max_d; d++) { // Bail out if deadline is reached. if (System.currentTimeMillis() > deadline) { break; } // Walk the front path one step. for (int k1 = -d + k1start; k1 <= d - k1end; k1 += 2) { int k1_offset = v_offset + k1; int x1; if (k1 == -d || (k1 != d && v1[k1_offset - 1] < v1[k1_offset + 1])) { x1 = v1[k1_offset + 1]; } else { x1 = v1[k1_offset - 1] + 1; } int y1 = x1 - k1; while (x1 < text1_length && y1 < text2_length && text1.charAt(x1) == text2.charAt(y1)) { x1++; y1++; } v1[k1_offset] = x1; if (x1 > text1_length) { // Ran off the right of the graph. k1end += 2; } else if (y1 > text2_length) { // Ran off the bottom of the graph. k1start += 2; } else if (front) { int k2_offset = v_offset + delta - k1; if (k2_offset >= 0 && k2_offset < v_length && v2[k2_offset] != -1) { // Mirror x2 onto top-left coordinate system. int x2 = text1_length - v2[k2_offset]; if (x1 >= x2) { // Overlap detected. return diff_bisectSplit(text1, text2, x1, y1, deadline); } } } } // Walk the reverse path one step. for (int k2 = -d + k2start; k2 <= d - k2end; k2 += 2) { int k2_offset = v_offset + k2; int x2; if (k2 == -d || (k2 != d && v2[k2_offset - 1] < v2[k2_offset + 1])) { x2 = v2[k2_offset + 1]; } else { x2 = v2[k2_offset - 1] + 1; } int y2 = x2 - k2; while (x2 < text1_length && y2 < text2_length && text1.charAt(text1_length - x2 - 1) == text2.charAt(text2_length - y2 - 1)) { x2++; y2++; } v2[k2_offset] = x2; if (x2 > text1_length) { // Ran off the left of the graph. k2end += 2; } else if (y2 > text2_length) { // Ran off the top of the graph. k2start += 2; } else if (!front) { int k1_offset = v_offset + delta - k2; if (k1_offset >= 0 && k1_offset < v_length && v1[k1_offset] != -1) { int x1 = v1[k1_offset]; int y1 = v_offset + x1 - k1_offset; // Mirror x2 onto top-left coordinate system. x2 = text1_length - x2; if (x1 >= x2) { // Overlap detected. return diff_bisectSplit(text1, text2, x1, y1, deadline); } } } } } // Diff took too long and hit the deadline or // number of diffs equals number of characters, no commonality at all. LinkedList<Diff> diffs = new LinkedList<Diff>(); diffs.add(new Diff(Operation.DELETE, text1)); diffs.add(new Diff(Operation.INSERT, text2)); return diffs; }
Find the 'middle snake' of a diff, split the problem in two and return the recursively constructed diff. See Myers 1986 paper: An O(ND) Difference Algorithm and Its Variations. @param text1 Old string to be diffed. @param text2 New string to be diffed. @param deadline Time at which to bail if not yet complete. @return LinkedList of Diff objects.
diff_bisect
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
private LinkedList<Diff> diff_bisectSplit(String text1, String text2, int x, int y, long deadline) { String text1a = text1.substring(0, x); String text2a = text2.substring(0, y); String text1b = text1.substring(x); String text2b = text2.substring(y); // Compute both diffs serially. LinkedList<Diff> diffs = diff_main(text1a, text2a, false, deadline); LinkedList<Diff> diffsb = diff_main(text1b, text2b, false, deadline); diffs.addAll(diffsb); return diffs; }
Given the location of the 'middle snake', split the diff in two parts and recurse. @param text1 Old string to be diffed. @param text2 New string to be diffed. @param x Index of split point in text1. @param y Index of split point in text2. @param deadline Time at which to bail if not yet complete. @return LinkedList of Diff objects.
diff_bisectSplit
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
protected LinesToCharsResult diff_linesToChars(String text1, String text2) { List<String> lineArray = new ArrayList<String>(); Map<String, Integer> lineHash = new HashMap<String, Integer>(); // e.g. linearray[4] == "Hello\n" // e.g. linehash.get("Hello\n") == 4 // "\x00" is a valid character, but various debuggers don't like it. // So we'll insert a junk entry to avoid generating a null character. lineArray.add(""); String chars1 = diff_linesToCharsMunge(text1, lineArray, lineHash); String chars2 = diff_linesToCharsMunge(text2, lineArray, lineHash); return new LinesToCharsResult(chars1, chars2, lineArray); }
Split two texts into a list of strings. Reduce the texts to a string of hashes where each Unicode character represents one line. @param text1 First string. @param text2 Second string. @return An object containing the encoded text1, the encoded text2 and the List of unique strings. The zeroth element of the List of unique strings is intentionally blank.
diff_linesToChars
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
private String diff_linesToCharsMunge(String text, List<String> lineArray, Map<String, Integer> lineHash) { int lineStart = 0; int lineEnd = -1; String line; StringBuilder chars = new StringBuilder(); // Walk the text, pulling out a substring for each line. // text.split('\n') would would temporarily double our memory footprint. // Modifying text would create many large strings to garbage collect. while (lineEnd < text.length() - 1) { lineEnd = text.indexOf('\n', lineStart); if (lineEnd == -1) { lineEnd = text.length() - 1; } line = text.substring(lineStart, lineEnd + 1); lineStart = lineEnd + 1; if (lineHash.containsKey(line)) { chars.append(String.valueOf((char) (int) lineHash.get(line))); } else { lineArray.add(line); lineHash.put(line, lineArray.size() - 1); chars.append(String.valueOf((char) (lineArray.size() - 1))); } } return chars.toString(); }
Split a text into a list of strings. Reduce the texts to a string of hashes where each Unicode character represents one line. @param text String to encode. @param lineArray List of unique strings. @param lineHash Map of strings to indices. @return Encoded string.
diff_linesToCharsMunge
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
protected void diff_charsToLines(LinkedList<Diff> diffs, List<String> lineArray) { StringBuilder text; for (Diff diff : diffs) { text = new StringBuilder(); for (int y = 0; y < diff.text.length(); y++) { text.append(lineArray.get(diff.text.charAt(y))); } diff.text = text.toString(); } }
Rehydrate the text in a diff from a string of line hashes to real lines of text. @param diffs LinkedList of Diff objects. @param lineArray List of unique strings.
diff_charsToLines
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public int diff_commonPrefix(String text1, String text2) { // Performance analysis: http://neil.fraser.name/news/2007/10/09/ int n = Math.min(text1.length(), text2.length()); for (int i = 0; i < n; i++) { if (text1.charAt(i) != text2.charAt(i)) { return i; } } return n; }
Determine the common prefix of two strings @param text1 First string. @param text2 Second string. @return The number of characters common to the start of each string.
diff_commonPrefix
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public int diff_commonSuffix(String text1, String text2) { // Performance analysis: http://neil.fraser.name/news/2007/10/09/ int text1_length = text1.length(); int text2_length = text2.length(); int n = Math.min(text1_length, text2_length); for (int i = 1; i <= n; i++) { if (text1.charAt(text1_length - i) != text2.charAt(text2_length - i)) { return i - 1; } } return n; }
Determine the common suffix of two strings @param text1 First string. @param text2 Second string. @return The number of characters common to the end of each string.
diff_commonSuffix
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
protected int diff_commonOverlap(String text1, String text2) { // Cache the text lengths to prevent multiple calls. int text1_length = text1.length(); int text2_length = text2.length(); // Eliminate the null case. if (text1_length == 0 || text2_length == 0) { return 0; } // Truncate the longer string. if (text1_length > text2_length) { text1 = text1.substring(text1_length - text2_length); } else if (text1_length < text2_length) { text2 = text2.substring(0, text1_length); } int text_length = Math.min(text1_length, text2_length); // Quick check for the worst case. if (text1.equals(text2)) { return text_length; } // Start by looking for a single character match // and increase length until no match is found. // Performance analysis: http://neil.fraser.name/news/2010/11/04/ int best = 0; int length = 1; while (true) { String pattern = text1.substring(text_length - length); int found = text2.indexOf(pattern); if (found == -1) { return best; } length += found; if (found == 0 || text1.substring(text_length - length).equals(text2.substring(0, length))) { best = length; length++; } } }
Determine if the suffix of one string is the prefix of another. @param text1 First string. @param text2 Second string. @return The number of characters common to the end of the first string and the start of the second string.
diff_commonOverlap
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
protected String[] diff_halfMatch(String text1, String text2) { if (Diff_Timeout <= 0) { // Don't risk returning a non-optimal diff if we have unlimited // time. return null; } String longtext = text1.length() > text2.length() ? text1 : text2; String shorttext = text1.length() > text2.length() ? text2 : text1; if (longtext.length() < 4 || shorttext.length() * 2 < longtext.length()) { return null; // Pointless. } // First check if the second quarter is the seed for a half-match. String[] hm1 = diff_halfMatchI(longtext, shorttext, (longtext.length() + 3) / 4); // Check again based on the third quarter. String[] hm2 = diff_halfMatchI(longtext, shorttext, (longtext.length() + 1) / 2); String[] hm; if (hm1 == null && hm2 == null) { return null; } else if (hm2 == null) { hm = hm1; } else if (hm1 == null) { hm = hm2; } else { // Both matched. Select the longest. hm = hm1[4].length() > hm2[4].length() ? hm1 : hm2; } // A half-match was found, sort out the return data. if (text1.length() > text2.length()) { return hm; // return new String[]{hm[0], hm[1], hm[2], hm[3], hm[4]}; } else { return new String[] {hm[2], hm[3], hm[0], hm[1], hm[4]}; } }
Do the two texts share a substring which is at least half the length of the longer text? This speedup can produce non-minimal diffs. @param text1 First string. @param text2 Second string. @return Five element String array, containing the prefix of text1, the suffix of text1, the prefix of text2, the suffix of text2 and the common middle. Or null if there was no match.
diff_halfMatch
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
private String[] diff_halfMatchI(String longtext, String shorttext, int i) { // Start with a 1/4 length substring at position i as a seed. String seed = longtext.substring(i, i + longtext.length() / 4); int j = -1; String best_common = ""; String best_longtext_a = "", best_longtext_b = ""; String best_shorttext_a = "", best_shorttext_b = ""; while ((j = shorttext.indexOf(seed, j + 1)) != -1) { int prefixLength = diff_commonPrefix(longtext.substring(i), shorttext.substring(j)); int suffixLength = diff_commonSuffix(longtext.substring(0, i), shorttext.substring(0, j)); if (best_common.length() < suffixLength + prefixLength) { best_common = shorttext.substring(j - suffixLength, j) + shorttext.substring(j, j + prefixLength); best_longtext_a = longtext.substring(0, i - suffixLength); best_longtext_b = longtext.substring(i + prefixLength); best_shorttext_a = shorttext.substring(0, j - suffixLength); best_shorttext_b = shorttext.substring(j + prefixLength); } } if (best_common.length() * 2 >= longtext.length()) { return new String[] {best_longtext_a, best_longtext_b, best_shorttext_a, best_shorttext_b, best_common}; } else { return null; } }
Does a substring of shorttext exist within longtext such that the substring is at least half the length of longtext? @param longtext Longer string. @param shorttext Shorter string. @param i Start index of quarter length substring within longtext. @return Five element String array, containing the prefix of longtext, the suffix of longtext, the prefix of shorttext, the suffix of shorttext and the common middle. Or null if there was no match.
diff_halfMatchI
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public void diff_cleanupSemantic(LinkedList<Diff> diffs) { if (diffs.isEmpty()) { return; } boolean changes = false; Stack<Diff> equalities = new Stack<Diff>(); // Stack of qualities. String lastequality = null; // Always equal to // equalities.lastElement().text ListIterator<Diff> pointer = diffs.listIterator(); // Number of characters that changed prior to the equality. int length_insertions1 = 0; int length_deletions1 = 0; // Number of characters that changed after the equality. int length_insertions2 = 0; int length_deletions2 = 0; Diff thisDiff = pointer.next(); while (thisDiff != null) { if (thisDiff.operation == Operation.EQUAL) { // Equality found. equalities.push(thisDiff); length_insertions1 = length_insertions2; length_deletions1 = length_deletions2; length_insertions2 = 0; length_deletions2 = 0; lastequality = thisDiff.text; } else { // An insertion or deletion. if (thisDiff.operation == Operation.INSERT) { length_insertions2 += thisDiff.text.length(); } else { length_deletions2 += thisDiff.text.length(); } // Eliminate an equality that is smaller or equal to the edits // on both // sides of it. if (lastequality != null && (lastequality.length() <= Math .max(length_insertions1, length_deletions1)) && (lastequality.length() <= Math .max(length_insertions2, length_deletions2))) { // System.out.println("Splitting: '" + lastequality + "'"); // Walk back to offending equality. while (thisDiff != equalities.lastElement()) { thisDiff = pointer.previous(); } pointer.next(); // Replace equality with a delete. pointer.set(new Diff(Operation.DELETE, lastequality)); // Insert a corresponding an insert. pointer.add(new Diff(Operation.INSERT, lastequality)); equalities.pop(); // Throw away the equality we just // deleted. if (!equalities.empty()) { // Throw away the previous equality (it needs to be // reevaluated). equalities.pop(); } if (equalities.empty()) { // There are no previous equalities, walk back to the // start. while (pointer.hasPrevious()) { pointer.previous(); } } else { // There is a safe equality we can fall back to. thisDiff = equalities.lastElement(); while (thisDiff != pointer.previous()) { // Intentionally empty loop. } } length_insertions1 = 0; // Reset the counters. length_insertions2 = 0; length_deletions1 = 0; length_deletions2 = 0; lastequality = null; changes = true; } } thisDiff = pointer.hasNext() ? pointer.next() : null; } // Normalize the diff. if (changes) { diff_cleanupMerge(diffs); } diff_cleanupSemanticLossless(diffs); // Find any overlaps between deletions and insertions. // e.g: <del>abcxxx</del><ins>xxxdef</ins> // -> <del>abc</del>xxx<ins>def</ins> // e.g: <del>xxxabc</del><ins>defxxx</ins> // -> <ins>def</ins>xxx<del>abc</del> // Only extract an overlap if it is as big as the edit ahead or behind // it. pointer = diffs.listIterator(); Diff prevDiff = null; thisDiff = null; if (pointer.hasNext()) { prevDiff = pointer.next(); if (pointer.hasNext()) { thisDiff = pointer.next(); } } while (thisDiff != null) { if (prevDiff.operation == Operation.DELETE && thisDiff.operation == Operation.INSERT) { String deletion = prevDiff.text; String insertion = thisDiff.text; int overlap_length1 = this.diff_commonOverlap(deletion, insertion); int overlap_length2 = this.diff_commonOverlap(insertion, deletion); if (overlap_length1 >= overlap_length2) { if (overlap_length1 >= deletion.length() / 2.0 || overlap_length1 >= insertion.length() / 2.0) { // Overlap found. Insert an equality and trim the // surrounding edits. pointer.previous(); pointer.add(new Diff(Operation.EQUAL, insertion.substring(0, overlap_length1))); prevDiff.text = deletion.substring(0, deletion.length() - overlap_length1); thisDiff.text = insertion.substring(overlap_length1); // pointer.add inserts the element before the cursor, so // there is // no need to step past the new element. } } else { if (overlap_length2 >= deletion.length() / 2.0 || overlap_length2 >= insertion.length() / 2.0) { // Reverse overlap found. // Insert an equality and swap and trim the surrounding // edits. pointer.previous(); pointer.add(new Diff(Operation.EQUAL, deletion .substring(0, overlap_length2))); prevDiff.operation = Operation.INSERT; prevDiff.text = insertion.substring(0, insertion.length() - overlap_length2); thisDiff.operation = Operation.DELETE; thisDiff.text = deletion.substring(overlap_length2); // pointer.add inserts the element before the cursor, so // there is // no need to step past the new element. } } thisDiff = pointer.hasNext() ? pointer.next() : null; } prevDiff = thisDiff; thisDiff = pointer.hasNext() ? pointer.next() : null; } }
Reduce the number of edits by eliminating semantically trivial equalities. @param diffs LinkedList of Diff objects.
diff_cleanupSemantic
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public void diff_cleanupSemanticLossless(LinkedList<Diff> diffs) { String equality1, edit, equality2; String commonString; int commonOffset; int score, bestScore; String bestEquality1, bestEdit, bestEquality2; // Create a new iterator at the start. ListIterator<Diff> pointer = diffs.listIterator(); Diff prevDiff = pointer.hasNext() ? pointer.next() : null; Diff thisDiff = pointer.hasNext() ? pointer.next() : null; Diff nextDiff = pointer.hasNext() ? pointer.next() : null; // Intentionally ignore the first and last element (don't need // checking). while (nextDiff != null) { if (prevDiff.operation == Operation.EQUAL && nextDiff.operation == Operation.EQUAL) { // This is a single edit surrounded by equalities. equality1 = prevDiff.text; edit = thisDiff.text; equality2 = nextDiff.text; // First, shift the edit as far left as possible. commonOffset = diff_commonSuffix(equality1, edit); if (commonOffset != 0) { commonString = edit.substring(edit.length() - commonOffset); equality1 = equality1.substring(0, equality1.length() - commonOffset); edit = commonString + edit.substring(0, edit.length() - commonOffset); equality2 = commonString + equality2; } // Second, step character by character right, looking for the // best fit. bestEquality1 = equality1; bestEdit = edit; bestEquality2 = equality2; bestScore = diff_cleanupSemanticScore(equality1, edit) + diff_cleanupSemanticScore(edit, equality2); while (edit.length() != 0 && equality2.length() != 0 && edit.charAt(0) == equality2.charAt(0)) { equality1 += edit.charAt(0); edit = edit.substring(1) + equality2.charAt(0); equality2 = equality2.substring(1); score = diff_cleanupSemanticScore(equality1, edit) + diff_cleanupSemanticScore(edit, equality2); // The >= encourages trailing rather than leading whitespace // on edits. if (score >= bestScore) { bestScore = score; bestEquality1 = equality1; bestEdit = edit; bestEquality2 = equality2; } } if (!prevDiff.text.equals(bestEquality1)) { // We have an improvement, save it back to the diff. if (bestEquality1.length() != 0) { prevDiff.text = bestEquality1; } else { pointer.previous(); // Walk past nextDiff. pointer.previous(); // Walk past thisDiff. pointer.previous(); // Walk past prevDiff. pointer.remove(); // Delete prevDiff. pointer.next(); // Walk past thisDiff. pointer.next(); // Walk past nextDiff. } thisDiff.text = bestEdit; if (bestEquality2.length() != 0) { nextDiff.text = bestEquality2; } else { pointer.remove(); // Delete nextDiff. nextDiff = thisDiff; thisDiff = prevDiff; } } } prevDiff = thisDiff; thisDiff = nextDiff; nextDiff = pointer.hasNext() ? pointer.next() : null; } }
Look for single edits surrounded on both sides by equalities which can be shifted sideways to align the edit to a word boundary. e.g: The c<ins>at c</ins>ame. -> The <ins>cat </ins>came. @param diffs LinkedList of Diff objects.
diff_cleanupSemanticLossless
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
private int diff_cleanupSemanticScore(String one, String two) { if (one.length() == 0 || two.length() == 0) { // Edges are the best. return 6; } // Each port of this function behaves slightly differently due to // subtle differences in each language's definition of things like // 'whitespace'. Since this function's purpose is largely cosmetic, // the choice has been made to use each language's native features // rather than force total conformity. char char1 = one.charAt(one.length() - 1); char char2 = two.charAt(0); boolean nonAlphaNumeric1 = !Character.isLetterOrDigit(char1); boolean nonAlphaNumeric2 = !Character.isLetterOrDigit(char2); boolean whitespace1 = nonAlphaNumeric1 && Character.isWhitespace(char1); boolean whitespace2 = nonAlphaNumeric2 && Character.isWhitespace(char2); boolean lineBreak1 = whitespace1 && Character.getType(char1) == Character.CONTROL; boolean lineBreak2 = whitespace2 && Character.getType(char2) == Character.CONTROL; boolean blankLine1 = lineBreak1 && BLANKLINEEND.matcher(one).find(); boolean blankLine2 = lineBreak2 && BLANKLINESTART.matcher(two).find(); if (blankLine1 || blankLine2) { // Five points for blank lines. return 5; } else if (lineBreak1 || lineBreak2) { // Four points for line breaks. return 4; } else if (nonAlphaNumeric1 && !whitespace1 && whitespace2) { // Three points for end of sentences. return 3; } else if (whitespace1 || whitespace2) { // Two points for whitespace. return 2; } else if (nonAlphaNumeric1 || nonAlphaNumeric2) { // One point for non-alphanumeric. return 1; } return 0; }
Given two strings, compute a score representing whether the internal boundary falls on logical boundaries. Scores range from 6 (best) to 0 (worst). @param one First string. @param two Second string. @return The score.
diff_cleanupSemanticScore
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public void diff_cleanupEfficiency(LinkedList<Diff> diffs) { if (diffs.isEmpty()) { return; } boolean changes = false; Stack<Diff> equalities = new Stack<Diff>(); // Stack of equalities. String lastequality = null; // Always equal to // equalities.lastElement().text ListIterator<Diff> pointer = diffs.listIterator(); // Is there an insertion operation before the last equality. boolean pre_ins = false; // Is there a deletion operation before the last equality. boolean pre_del = false; // Is there an insertion operation after the last equality. boolean post_ins = false; // Is there a deletion operation after the last equality. boolean post_del = false; Diff thisDiff = pointer.next(); Diff safeDiff = thisDiff; // The last Diff that is known to be // unsplitable. while (thisDiff != null) { if (thisDiff.operation == Operation.EQUAL) { // Equality found. if (thisDiff.text.length() < Diff_EditCost && (post_ins || post_del)) { // Candidate found. equalities.push(thisDiff); pre_ins = post_ins; pre_del = post_del; lastequality = thisDiff.text; } else { // Not a candidate, and can never become one. equalities.clear(); lastequality = null; safeDiff = thisDiff; } post_ins = post_del = false; } else { // An insertion or deletion. if (thisDiff.operation == Operation.DELETE) { post_del = true; } else { post_ins = true; } /* * Five types to be split: * <ins>A</ins><del>B</del>XY<ins>C</ins><del>D</del> * <ins>A</ins>X<ins>C</ins><del>D</del> * <ins>A</ins><del>B</del>X<ins>C</ins> * <ins>A</del>X<ins>C</ins><del>D</del> * <ins>A</ins><del>B</del>X<del>C</del> */ if (lastequality != null && ((pre_ins && pre_del && post_ins && post_del) || ((lastequality.length() < Diff_EditCost / 2) && ((pre_ins ? 1 : 0) + (pre_del ? 1 : 0) + (post_ins ? 1 : 0) + (post_del ? 1 : 0)) == 3))) { // System.out.println("Splitting: '" + lastequality + "'"); // Walk back to offending equality. while (thisDiff != equalities.lastElement()) { thisDiff = pointer.previous(); } pointer.next(); // Replace equality with a delete. pointer.set(new Diff(Operation.DELETE, lastequality)); // Insert a corresponding an insert. pointer.add(thisDiff = new Diff(Operation.INSERT, lastequality)); equalities.pop(); // Throw away the equality we just // deleted. lastequality = null; if (pre_ins && pre_del) { // No changes made which could affect previous entry, // keep going. post_ins = post_del = true; equalities.clear(); safeDiff = thisDiff; } else { if (!equalities.empty()) { // Throw away the previous equality (it needs to be // reevaluated). equalities.pop(); } if (equalities.empty()) { // There are no previous questionable equalities, // walk back to the last known safe diff. thisDiff = safeDiff; } else { // There is an equality we can fall back to. thisDiff = equalities.lastElement(); } while (thisDiff != pointer.previous()) { // Intentionally empty loop. } post_ins = post_del = false; } changes = true; } } thisDiff = pointer.hasNext() ? pointer.next() : null; } if (changes) { diff_cleanupMerge(diffs); } }
Reduce the number of edits by eliminating operationally trivial equalities. @param diffs LinkedList of Diff objects.
diff_cleanupEfficiency
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public void diff_cleanupMerge(LinkedList<Diff> diffs) { diffs.add(new Diff(Operation.EQUAL, "")); // Add a dummy entry at the // end. ListIterator<Diff> pointer = diffs.listIterator(); int count_delete = 0; int count_insert = 0; String text_delete = ""; String text_insert = ""; Diff thisDiff = pointer.next(); Diff prevEqual = null; int commonlength; while (thisDiff != null) { switch (thisDiff.operation) { case INSERT: count_insert++; text_insert += thisDiff.text; prevEqual = null; break; case DELETE: count_delete++; text_delete += thisDiff.text; prevEqual = null; break; case EQUAL: if (count_delete + count_insert > 1) { boolean both_types = count_delete != 0 && count_insert != 0; // Delete the offending records. pointer.previous(); // Reverse direction. while (count_delete-- > 0) { pointer.previous(); pointer.remove(); } while (count_insert-- > 0) { pointer.previous(); pointer.remove(); } if (both_types) { // Factor out any common prefixies. commonlength = diff_commonPrefix(text_insert, text_delete); if (commonlength != 0) { if (pointer.hasPrevious()) { thisDiff = pointer.previous(); assert thisDiff.operation == Operation.EQUAL : "Previous diff should have been an equality."; thisDiff.text += text_insert.substring(0, commonlength); pointer.next(); } else { pointer.add(new Diff(Operation.EQUAL, text_insert.substring(0, commonlength))); } text_insert = text_insert.substring(commonlength); text_delete = text_delete.substring(commonlength); } // Factor out any common suffixies. commonlength = diff_commonSuffix(text_insert, text_delete); if (commonlength != 0) { thisDiff = pointer.next(); thisDiff.text = text_insert.substring(text_insert.length() - commonlength) + thisDiff.text; text_insert = text_insert.substring(0, text_insert.length() - commonlength); text_delete = text_delete.substring(0, text_delete.length() - commonlength); pointer.previous(); } } // Insert the merged records. if (text_delete.length() != 0) { pointer.add(new Diff(Operation.DELETE, text_delete)); } if (text_insert.length() != 0) { pointer.add(new Diff(Operation.INSERT, text_insert)); } // Step forward to the equality. thisDiff = pointer.hasNext() ? pointer.next() : null; } else if (prevEqual != null) { // Merge this equality with the previous one. prevEqual.text += thisDiff.text; pointer.remove(); thisDiff = pointer.previous(); pointer.next(); // Forward direction } count_insert = 0; count_delete = 0; text_delete = ""; text_insert = ""; prevEqual = thisDiff; break; } thisDiff = pointer.hasNext() ? pointer.next() : null; } if (diffs.getLast().text.length() == 0) { diffs.removeLast(); // Remove the dummy entry at the end. } /* * Second pass: look for single edits surrounded on both sides by * equalities which can be shifted sideways to eliminate an equality. * e.g: A<ins>BA</ins>C -> <ins>AB</ins>AC */ boolean changes = false; // Create a new iterator at the start. // (As opposed to walking the current one back.) pointer = diffs.listIterator(); Diff prevDiff = pointer.hasNext() ? pointer.next() : null; thisDiff = pointer.hasNext() ? pointer.next() : null; Diff nextDiff = pointer.hasNext() ? pointer.next() : null; // Intentionally ignore the first and last element (don't need // checking). while (nextDiff != null) { if (prevDiff.operation == Operation.EQUAL && nextDiff.operation == Operation.EQUAL) { // This is a single edit surrounded by equalities. if (thisDiff.text.endsWith(prevDiff.text)) { // Shift the edit over the previous equality. thisDiff.text = prevDiff.text + thisDiff.text.substring(0, thisDiff.text.length() - prevDiff.text.length()); nextDiff.text = prevDiff.text + nextDiff.text; pointer.previous(); // Walk past nextDiff. pointer.previous(); // Walk past thisDiff. pointer.previous(); // Walk past prevDiff. pointer.remove(); // Delete prevDiff. pointer.next(); // Walk past thisDiff. thisDiff = pointer.next(); // Walk past nextDiff. nextDiff = pointer.hasNext() ? pointer.next() : null; changes = true; } else if (thisDiff.text.startsWith(nextDiff.text)) { // Shift the edit over the next equality. prevDiff.text += nextDiff.text; thisDiff.text = thisDiff.text.substring(nextDiff.text.length()) + nextDiff.text; pointer.remove(); // Delete nextDiff. nextDiff = pointer.hasNext() ? pointer.next() : null; changes = true; } } prevDiff = thisDiff; thisDiff = nextDiff; nextDiff = pointer.hasNext() ? pointer.next() : null; } // If shifts were made, the diff needs reordering and another shift // sweep. if (changes) { diff_cleanupMerge(diffs); } }
Reorder and merge like edit sections. Merge equalities. Any edit section can move as long as it doesn't cross an equality. @param diffs LinkedList of Diff objects.
diff_cleanupMerge
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public int diff_xIndex(LinkedList<Diff> diffs, int loc) { int chars1 = 0; int chars2 = 0; int last_chars1 = 0; int last_chars2 = 0; Diff lastDiff = null; for (Diff aDiff : diffs) { if (aDiff.operation != Operation.INSERT) { // Equality or deletion. chars1 += aDiff.text.length(); } if (aDiff.operation != Operation.DELETE) { // Equality or insertion. chars2 += aDiff.text.length(); } if (chars1 > loc) { // Overshot the location. lastDiff = aDiff; break; } last_chars1 = chars1; last_chars2 = chars2; } if (lastDiff != null && lastDiff.operation == Operation.DELETE) { // The location was deleted. return last_chars2; } // Add the remaining character length. return last_chars2 + (loc - last_chars1); }
loc is a location in text1, compute and return the equivalent location in text2. e.g. "The cat" vs "The big cat", 1->1, 5->8 @param diffs LinkedList of Diff objects. @param loc Location within text1. @return Location within text2.
diff_xIndex
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public String diff_prettyHtml(LinkedList<Diff> diffs) { StringBuilder html = new StringBuilder(); for (Diff aDiff : diffs) { String text = aDiff.text.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;") .replace("\n", "&para;<br>"); switch (aDiff.operation) { case INSERT: html.append("<ins style=\"background:#e6ffe6;\">").append(text) .append("</ins>"); break; case DELETE: html.append("<del style=\"background:#ffe6e6;\">").append(text) .append("</del>"); break; case EQUAL: html.append("<span>").append(text).append("</span>"); break; } } return html.toString(); }
Convert a Diff list into a pretty HTML report. @param diffs LinkedList of Diff objects. @return HTML representation.
diff_prettyHtml
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public String diff_text1(LinkedList<Diff> diffs) { StringBuilder text = new StringBuilder(); for (Diff aDiff : diffs) { if (aDiff.operation != Operation.INSERT) { text.append(aDiff.text); } } return text.toString(); }
Compute and return the source text (all equalities and deletions). @param diffs LinkedList of Diff objects. @return Source text.
diff_text1
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public String diff_text2(LinkedList<Diff> diffs) { StringBuilder text = new StringBuilder(); for (Diff aDiff : diffs) { if (aDiff.operation != Operation.DELETE) { text.append(aDiff.text); } } return text.toString(); }
Compute and return the destination text (all equalities and insertions). @param diffs LinkedList of Diff objects. @return Destination text.
diff_text2
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public int diff_levenshtein(LinkedList<Diff> diffs) { int levenshtein = 0; int insertions = 0; int deletions = 0; for (Diff aDiff : diffs) { switch (aDiff.operation) { case INSERT: insertions += aDiff.text.length(); break; case DELETE: deletions += aDiff.text.length(); break; case EQUAL: // A deletion and an insertion is one substitution. levenshtein += Math.max(insertions, deletions); insertions = 0; deletions = 0; break; } } levenshtein += Math.max(insertions, deletions); return levenshtein; }
Compute the Levenshtein distance; the number of inserted, deleted or substituted characters. @param diffs LinkedList of Diff objects. @return Number of changes.
diff_levenshtein
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public String diff_toDelta(LinkedList<Diff> diffs) { StringBuilder text = new StringBuilder(); for (Diff aDiff : diffs) { switch (aDiff.operation) { case INSERT: try { text.append("+") .append(URLEncoder.encode(aDiff.text, "UTF-8").replace('+', ' ')) .append("\t"); } catch (UnsupportedEncodingException e) { // Not likely on modern system. throw new Error("This system does not support UTF-8.", e); } break; case DELETE: text.append("-").append(aDiff.text.length()).append("\t"); break; case EQUAL: text.append("=").append(aDiff.text.length()).append("\t"); break; } } String delta = text.toString(); if (delta.length() != 0) { // Strip off trailing tab character. delta = delta.substring(0, delta.length() - 1); delta = unescapeForEncodeUriCompatability(delta); } return delta; }
Crush the diff into an encoded string which describes the operations required to transform text1 into text2. E.g. =3\t-2\t+ing -> Keep 3 chars, delete 2 chars, insert 'ing'. Operations are tab-separated. Inserted text is escaped using %xx notation. @param diffs Array of Diff objects. @return Delta text.
diff_toDelta
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public LinkedList<Diff> diff_fromDelta(String text1, String delta) throws IllegalArgumentException { LinkedList<Diff> diffs = new LinkedList<Diff>(); int pointer = 0; // Cursor in text1 String[] tokens = delta.split("\t"); for (String token : tokens) { if (token.length() == 0) { // Blank tokens are ok (from a trailing \t). continue; } // Each token begins with a one character parameter which specifies // the // operation of this token (delete, insert, equality). String param = token.substring(1); switch (token.charAt(0)) { case '+': // decode would change all "+" to " " param = param.replace("+", "%2B"); try { param = URLDecoder.decode(param, "UTF-8"); } catch (UnsupportedEncodingException e) { // Not likely on modern system. throw new Error("This system does not support UTF-8.", e); } catch (IllegalArgumentException e) { // Malformed URI sequence. throw new IllegalArgumentException("Illegal escape in diff_fromDelta: " + param, e); } diffs.add(new Diff(Operation.INSERT, param)); break; case '-': // Fall through. case '=': int n; try { n = Integer.parseInt(param); } catch (NumberFormatException e) { throw new IllegalArgumentException("Invalid number in diff_fromDelta: " + param, e); } if (n < 0) { throw new IllegalArgumentException("Negative number in diff_fromDelta: " + param); } String text; try { text = text1.substring(pointer, pointer += n); } catch (StringIndexOutOfBoundsException e) { throw new IllegalArgumentException("Delta length (" + pointer + ") larger than source text length (" + text1.length() + ").", e); } if (token.charAt(0) == '=') { diffs.add(new Diff(Operation.EQUAL, text)); } else { diffs.add(new Diff(Operation.DELETE, text)); } break; default: // Anything else is an error. throw new IllegalArgumentException("Invalid diff operation in diff_fromDelta: " + token.charAt(0)); } } if (pointer != text1.length()) { throw new IllegalArgumentException("Delta length (" + pointer + ") smaller than source text length (" + text1.length() + ")."); } return diffs; }
Given the original text1, and an encoded string which describes the operations required to transform text1 into text2, compute the full diff. @param text1 Source string for the diff. @param delta Delta text. @return Array of Diff objects or null if invalid. @throws IllegalArgumentException If invalid input.
diff_fromDelta
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public int match_main(String text, String pattern, int loc) { // Check for null inputs. if (text == null || pattern == null) { throw new IllegalArgumentException("Null inputs. (match_main)"); } loc = Math.max(0, Math.min(loc, text.length())); if (text.equals(pattern)) { // Shortcut (potentially not guaranteed by the algorithm) return 0; } else if (text.length() == 0) { // Nothing to match. return -1; } else if (loc + pattern.length() <= text.length() && text.substring(loc, loc + pattern.length()).equals(pattern)) { // Perfect match at the perfect spot! (Includes case of null // pattern) return loc; } else { // Do a fuzzy compare. return match_bitap(text, pattern, loc); } }
Locate the best instance of 'pattern' in 'text' near 'loc'. Returns -1 if no match found. @param text The text to search. @param pattern The pattern to search for. @param loc The location to search around. @return Best match index or -1.
match_main
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
protected int match_bitap(String text, String pattern, int loc) { assert (Match_MaxBits == 0 || pattern.length() <= Match_MaxBits) : "Pattern too long for this application."; // Initialise the alphabet. Map<Character, Integer> s = match_alphabet(pattern); // Highest score beyond which we give up. double score_threshold = Match_Threshold; // Is there a nearby exact match? (speedup) int best_loc = text.indexOf(pattern, loc); if (best_loc != -1) { score_threshold = Math.min(match_bitapScore(0, best_loc, loc, pattern), score_threshold); // What about in the other direction? (speedup) best_loc = text.lastIndexOf(pattern, loc + pattern.length()); if (best_loc != -1) { score_threshold = Math.min(match_bitapScore(0, best_loc, loc, pattern), score_threshold); } } // Initialise the bit arrays. int matchmask = 1 << (pattern.length() - 1); best_loc = -1; int bin_min, bin_mid; int bin_max = pattern.length() + text.length(); // Empty initialization added to appease Java compiler. int[] last_rd = new int[0]; for (int d = 0; d < pattern.length(); d++) { // Scan for the best match; each iteration allows for one more // error. // Run a binary search to determine how far from 'loc' we can stray // at // this error level. bin_min = 0; bin_mid = bin_max; while (bin_min < bin_mid) { if (match_bitapScore(d, loc + bin_mid, loc, pattern) <= score_threshold) { bin_min = bin_mid; } else { bin_max = bin_mid; } bin_mid = (bin_max - bin_min) / 2 + bin_min; } // Use the result from this iteration as the maximum for the next. bin_max = bin_mid; int start = Math.max(1, loc - bin_mid + 1); int finish = Math.min(loc + bin_mid, text.length()) + pattern.length(); int[] rd = new int[finish + 2]; rd[finish + 1] = (1 << d) - 1; for (int j = finish; j >= start; j--) { int charMatch; if (text.length() <= j - 1 || !s.containsKey(text.charAt(j - 1))) { // Out of range. charMatch = 0; } else { charMatch = s.get(text.charAt(j - 1)); } if (d == 0) { // First pass: exact match. rd[j] = ((rd[j + 1] << 1) | 1) & charMatch; } else { // Subsequent passes: fuzzy match. rd[j] = (((rd[j + 1] << 1) | 1) & charMatch) | (((last_rd[j + 1] | last_rd[j]) << 1) | 1) | last_rd[j + 1]; } if ((rd[j] & matchmask) != 0) { double score = match_bitapScore(d, j - 1, loc, pattern); // This match will almost certainly be better than any // existing // match. But check anyway. if (score <= score_threshold) { // Told you so. score_threshold = score; best_loc = j - 1; if (best_loc > loc) { // When passing loc, don't exceed our current // distance from loc. start = Math.max(1, 2 * loc - best_loc); } else { // Already passed loc, downhill from here on in. break; } } } } if (match_bitapScore(d + 1, loc, loc, pattern) > score_threshold) { // No hope for a (better) match at greater error levels. break; } last_rd = rd; } return best_loc; }
Locate the best instance of 'pattern' in 'text' near 'loc' using the Bitap algorithm. Returns -1 if no match found. @param text The text to search. @param pattern The pattern to search for. @param loc The location to search around. @return Best match index or -1.
match_bitap
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
private double match_bitapScore(int e, int x, int loc, String pattern) { float accuracy = (float) e / pattern.length(); int proximity = Math.abs(loc - x); if (Match_Distance == 0) { // Dodge divide by zero error. return proximity == 0 ? accuracy : 1.0; } return accuracy + (proximity / (float) Match_Distance); }
Compute and return the score for a match with e errors and x location. @param e Number of errors in match. @param x Location of match. @param loc Expected location of match. @param pattern Pattern being sought. @return Overall score for match (0.0 = good, 1.0 = bad).
match_bitapScore
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
protected Map<Character, Integer> match_alphabet(String pattern) { Map<Character, Integer> s = new HashMap<Character, Integer>(); char[] char_pattern = pattern.toCharArray(); for (char c : char_pattern) { s.put(c, 0); } int i = 0; for (char c : char_pattern) { s.put(c, s.get(c) | (1 << (pattern.length() - i - 1))); i++; } return s; }
Initialise the alphabet for the Bitap algorithm. @param pattern The text to encode. @return Hash of character locations.
match_alphabet
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
protected void patch_addContext(Patch patch, String text) { if (text.length() == 0) { return; } String pattern = text.substring(patch.start2, patch.start2 + patch.length1); int padding = 0; // Look for the first and last matches of pattern in text. If two // different // matches are found, increase the pattern length. while (text.indexOf(pattern) != text.lastIndexOf(pattern) && pattern.length() < Match_MaxBits - Patch_Margin - Patch_Margin) { padding += Patch_Margin; pattern = text.substring(Math.max(0, patch.start2 - padding), Math.min(text.length(), patch.start2 + patch.length1 + padding)); } // Add one chunk for good luck. padding += Patch_Margin; // Add the prefix. String prefix = text.substring(Math.max(0, patch.start2 - padding), patch.start2); if (prefix.length() != 0) { patch.diffs.addFirst(new Diff(Operation.EQUAL, prefix)); } // Add the suffix. String suffix = text.substring(patch.start2 + patch.length1, Math.min(text.length(), patch.start2 + patch.length1 + padding)); if (suffix.length() != 0) { patch.diffs.addLast(new Diff(Operation.EQUAL, suffix)); } // Roll back the start points. patch.start1 -= prefix.length(); patch.start2 -= prefix.length(); // Extend the lengths. patch.length1 += prefix.length() + suffix.length(); patch.length2 += prefix.length() + suffix.length(); }
Increase the context until it is unique, but don't let the pattern expand beyond Match_MaxBits. @param patch The patch to grow. @param text Source text.
patch_addContext
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public LinkedList<Patch> patch_make(String text1, String text2) { if (text1 == null || text2 == null) { throw new IllegalArgumentException("Null inputs. (patch_make)"); } // No diffs provided, compute our own. LinkedList<Diff> diffs = diff_main(text1, text2, true); if (diffs.size() > 2) { diff_cleanupSemantic(diffs); diff_cleanupEfficiency(diffs); } return patch_make(text1, diffs); }
Compute a list of patches to turn text1 into text2. A set of diffs will be computed. @param text1 Old text. @param text2 New text. @return LinkedList of Patch objects.
patch_make
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public LinkedList<Patch> patch_make(LinkedList<Diff> diffs) { if (diffs == null) { throw new IllegalArgumentException("Null inputs. (patch_make)"); } // No origin string provided, compute our own. String text1 = diff_text1(diffs); return patch_make(text1, diffs); }
Compute a list of patches to turn text1 into text2. text1 will be derived from the provided diffs. @param diffs Array of Diff objects for text1 to text2. @return LinkedList of Patch objects.
patch_make
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public LinkedList<Patch> patch_make(String text1, String text2, LinkedList<Diff> diffs) { return patch_make(text1, diffs); }
Compute a list of patches to turn text1 into text2. text2 is ignored, diffs are the delta between text1 and text2. @param text1 Old text @param text2 Ignored. @param diffs Array of Diff objects for text1 to text2. @return LinkedList of Patch objects. @deprecated Prefer patch_make(String text1, LinkedList<Diff> diffs).
patch_make
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public LinkedList<Patch> patch_make(String text1, LinkedList<Diff> diffs) { if (text1 == null || diffs == null) { throw new IllegalArgumentException("Null inputs. (patch_make)"); } LinkedList<Patch> patches = new LinkedList<Patch>(); if (diffs.isEmpty()) { return patches; // Get rid of the null case. } Patch patch = new Patch(); int char_count1 = 0; // Number of characters into the text1 string. int char_count2 = 0; // Number of characters into the text2 string. // Start with text1 (prepatch_text) and apply the diffs until we arrive // at // text2 (postpatch_text). We recreate the patches one by one to // determine // context info. String prepatch_text = text1; String postpatch_text = text1; for (Diff aDiff : diffs) { if (patch.diffs.isEmpty() && aDiff.operation != Operation.EQUAL) { // A new patch starts here. patch.start1 = char_count1; patch.start2 = char_count2; } switch (aDiff.operation) { case INSERT: patch.diffs.add(aDiff); patch.length2 += aDiff.text.length(); postpatch_text = postpatch_text.substring(0, char_count2) + aDiff.text + postpatch_text.substring(char_count2); break; case DELETE: patch.length1 += aDiff.text.length(); patch.diffs.add(aDiff); postpatch_text = postpatch_text.substring(0, char_count2) + postpatch_text.substring(char_count2 + aDiff.text.length()); break; case EQUAL: if (aDiff.text.length() <= 2 * Patch_Margin && !patch.diffs.isEmpty() && aDiff != diffs.getLast()) { // Small equality inside a patch. patch.diffs.add(aDiff); patch.length1 += aDiff.text.length(); patch.length2 += aDiff.text.length(); } if (aDiff.text.length() >= 2 * Patch_Margin) { // Time for a new patch. if (!patch.diffs.isEmpty()) { patch_addContext(patch, prepatch_text); patches.add(patch); patch = new Patch(); // Unlike Unidiff, our patch lists have a rolling // context. // http://code.google.com/p/google-diff-match-patch/wiki/Unidiff // Update prepatch text & pos to reflect the // application of the // just completed patch. prepatch_text = postpatch_text; char_count1 = char_count2; } } break; } // Update the current character count. if (aDiff.operation != Operation.INSERT) { char_count1 += aDiff.text.length(); } if (aDiff.operation != Operation.DELETE) { char_count2 += aDiff.text.length(); } } // Pick up the leftover patch if not empty. if (!patch.diffs.isEmpty()) { patch_addContext(patch, prepatch_text); patches.add(patch); } return patches; }
Compute a list of patches to turn text1 into text2. text2 is not provided, diffs are the delta between text1 and text2. @param text1 Old text. @param diffs Array of Diff objects for text1 to text2. @return LinkedList of Patch objects.
patch_make
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public LinkedList<Patch> patch_deepCopy(LinkedList<Patch> patches) { LinkedList<Patch> patchesCopy = new LinkedList<Patch>(); for (Patch aPatch : patches) { Patch patchCopy = new Patch(); for (Diff aDiff : aPatch.diffs) { Diff diffCopy = new Diff(aDiff.operation, aDiff.text); patchCopy.diffs.add(diffCopy); } patchCopy.start1 = aPatch.start1; patchCopy.start2 = aPatch.start2; patchCopy.length1 = aPatch.length1; patchCopy.length2 = aPatch.length2; patchesCopy.add(patchCopy); } return patchesCopy; }
Given an array of patches, return another array that is identical. @param patches Array of Patch objects. @return Array of Patch objects.
patch_deepCopy
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public Object[] patch_apply(LinkedList<Patch> patches, String text) { if (patches.isEmpty()) { return new Object[] {text, new boolean[0]}; } // Deep copy the patches so that no changes are made to originals. patches = patch_deepCopy(patches); String nullPadding = patch_addPadding(patches); text = nullPadding + text + nullPadding; patch_splitMax(patches); int x = 0; // delta keeps track of the offset between the expected and actual // location // of the previous patch. If there are patches expected at positions 10 // and // 20, but the first patch was found at 12, delta is 2 and the second // patch // has an effective expected position of 22. int delta = 0; boolean[] results = new boolean[patches.size()]; for (Patch aPatch : patches) { int expected_loc = aPatch.start2 + delta; String text1 = diff_text1(aPatch.diffs); int start_loc; int end_loc = -1; if (text1.length() > this.Match_MaxBits) { // patch_splitMax will only provide an oversized pattern in the // case of // a monster delete. start_loc = match_main(text, text1.substring(0, this.Match_MaxBits), expected_loc); if (start_loc != -1) { end_loc = match_main(text, text1.substring(text1.length() - this.Match_MaxBits), expected_loc + text1.length() - this.Match_MaxBits); if (end_loc == -1 || start_loc >= end_loc) { // Can't find valid trailing context. Drop this patch. start_loc = -1; } } } else { start_loc = match_main(text, text1, expected_loc); } if (start_loc == -1) { // No match found. :( results[x] = false; // Subtract the delta for this failed patch from subsequent // patches. delta -= aPatch.length2 - aPatch.length1; } else { // Found a match. :) results[x] = true; delta = start_loc - expected_loc; String text2; if (end_loc == -1) { text2 = text.substring(start_loc, Math.min(start_loc + text1.length(), text.length())); } else { text2 = text.substring(start_loc, Math.min(end_loc + this.Match_MaxBits, text.length())); } if (text1.equals(text2)) { // Perfect match, just shove the replacement text in. text = text.substring(0, start_loc) + diff_text2(aPatch.diffs) + text.substring(start_loc + text1.length()); } else { // Imperfect match. Run a diff to get a framework of // equivalent // indices. LinkedList<Diff> diffs = diff_main(text1, text2, false); if (text1.length() > this.Match_MaxBits && diff_levenshtein(diffs) / (float) text1.length() > this.Patch_DeleteThreshold) { // The end points match, but the content is unacceptably // bad. results[x] = false; } else { diff_cleanupSemanticLossless(diffs); int index1 = 0; for (Diff aDiff : aPatch.diffs) { if (aDiff.operation != Operation.EQUAL) { int index2 = diff_xIndex(diffs, index1); if (aDiff.operation == Operation.INSERT) { // Insertion text = text.substring(0, start_loc + index2) + aDiff.text + text.substring(start_loc + index2); } else if (aDiff.operation == Operation.DELETE) { // Deletion text = text.substring(0, start_loc + index2) + text.substring(start_loc + diff_xIndex(diffs, index1 + aDiff.text.length())); } } if (aDiff.operation != Operation.DELETE) { index1 += aDiff.text.length(); } } } } } x++; } // Strip the padding off. text = text.substring(nullPadding.length(), text.length() - nullPadding.length()); return new Object[] {text, results}; }
Merge a set of patches onto the text. Return a patched text, as well as an array of true/false values indicating which patches were applied. @param patches Array of Patch objects @param text Old text. @return Two element Object array, containing the new text and an array of boolean values.
patch_apply
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public String patch_addPadding(LinkedList<Patch> patches) { short paddingLength = this.Patch_Margin; String nullPadding = ""; for (short x = 1; x <= paddingLength; x++) { nullPadding += String.valueOf((char) x); } // Bump all the patches forward. for (Patch aPatch : patches) { aPatch.start1 += paddingLength; aPatch.start2 += paddingLength; } // Add some padding on start of first diff. Patch patch = patches.getFirst(); LinkedList<Diff> diffs = patch.diffs; if (diffs.isEmpty() || diffs.getFirst().operation != Operation.EQUAL) { // Add nullPadding equality. diffs.addFirst(new Diff(Operation.EQUAL, nullPadding)); patch.start1 -= paddingLength; // Should be 0. patch.start2 -= paddingLength; // Should be 0. patch.length1 += paddingLength; patch.length2 += paddingLength; } else if (paddingLength > diffs.getFirst().text.length()) { // Grow first equality. Diff firstDiff = diffs.getFirst(); int extraLength = paddingLength - firstDiff.text.length(); firstDiff.text = nullPadding.substring(firstDiff.text.length()) + firstDiff.text; patch.start1 -= extraLength; patch.start2 -= extraLength; patch.length1 += extraLength; patch.length2 += extraLength; } // Add some padding on end of last diff. patch = patches.getLast(); diffs = patch.diffs; if (diffs.isEmpty() || diffs.getLast().operation != Operation.EQUAL) { // Add nullPadding equality. diffs.addLast(new Diff(Operation.EQUAL, nullPadding)); patch.length1 += paddingLength; patch.length2 += paddingLength; } else if (paddingLength > diffs.getLast().text.length()) { // Grow last equality. Diff lastDiff = diffs.getLast(); int extraLength = paddingLength - lastDiff.text.length(); lastDiff.text += nullPadding.substring(0, extraLength); patch.length1 += extraLength; patch.length2 += extraLength; } return nullPadding; }
Add some padding on text start and end so that edges can match something. Intended to be called only from within patch_apply. @param patches Array of Patch objects. @return The padding string added to each side.
patch_addPadding
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public String patch_toText(List<Patch> patches) { StringBuilder text = new StringBuilder(); for (Patch aPatch : patches) { text.append(aPatch); } return text.toString(); }
Take a list of patches and return a textual representation. @param patches List of Patch objects. @return Text representation of patches.
patch_toText
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public List<Patch> patch_fromText(String textline) throws IllegalArgumentException { List<Patch> patches = new LinkedList<Patch>(); if (textline.length() == 0) { return patches; } List<String> textList = Arrays.asList(textline.split("\n")); LinkedList<String> text = new LinkedList<String>(textList); Patch patch; Pattern patchHeader = Pattern.compile("^@@ -(\\d+),?(\\d*) \\+(\\d+),?(\\d*) @@$"); Matcher m; char sign; String line; while (!text.isEmpty()) { m = patchHeader.matcher(text.getFirst()); if (!m.matches()) { throw new IllegalArgumentException("Invalid patch string: " + text.getFirst()); } patch = new Patch(); patches.add(patch); patch.start1 = Integer.parseInt(m.group(1)); if (m.group(2).length() == 0) { patch.start1--; patch.length1 = 1; } else if (m.group(2).equals("0")) { patch.length1 = 0; } else { patch.start1--; patch.length1 = Integer.parseInt(m.group(2)); } patch.start2 = Integer.parseInt(m.group(3)); if (m.group(4).length() == 0) { patch.start2--; patch.length2 = 1; } else if (m.group(4).equals("0")) { patch.length2 = 0; } else { patch.start2--; patch.length2 = Integer.parseInt(m.group(4)); } text.removeFirst(); while (!text.isEmpty()) { try { sign = text.getFirst().charAt(0); } catch (IndexOutOfBoundsException e) { // Blank line? Whatever. text.removeFirst(); continue; } line = text.getFirst().substring(1); line = line.replace("+", "%2B"); // decode would change all "+" // to " " try { line = URLDecoder.decode(line, "UTF-8"); } catch (UnsupportedEncodingException e) { // Not likely on modern system. throw new Error("This system does not support UTF-8.", e); } catch (IllegalArgumentException e) { // Malformed URI sequence. throw new IllegalArgumentException("Illegal escape in patch_fromText: " + line, e); } if (sign == '-') { // Deletion. patch.diffs.add(new Diff(Operation.DELETE, line)); } else if (sign == '+') { // Insertion. patch.diffs.add(new Diff(Operation.INSERT, line)); } else if (sign == ' ') { // Minor equality. patch.diffs.add(new Diff(Operation.EQUAL, line)); } else if (sign == '@') { // Start of next patch. break; } else { // WTF? throw new IllegalArgumentException("Invalid patch mode '" + sign + "' in: " + line); } text.removeFirst(); } } return patches; }
Parse a textual representation of patches and return a List of Patch objects. @param textline Text representation of patches. @return List of Patch objects. @throws IllegalArgumentException If invalid input.
patch_fromText
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public String toString() { String prettyText = this.text.replace('\n', '\u00b6'); return "Diff(" + this.operation + ",\"" + prettyText + "\")"; }
Display a human-readable version of this Diff. @return text version.
toString
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
@Override public int hashCode() { final int prime = 31; int result = (operation == null) ? 0 : operation.hashCode(); result += prime * ((text == null) ? 0 : text.hashCode()); return result; }
Create a numeric hash value for a Diff. This function is not used by DMP. @return Hash value.
hashCode
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
@Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj == null) { return false; } if (getClass() != obj.getClass()) { return false; } Diff other = (Diff) obj; if (operation != other.operation) { return false; } if (text == null) { if (other.text != null) { return false; } } else if (!text.equals(other.text)) { return false; } return true; }
Is this Diff equivalent to another Diff? @param obj Another Diff to compare against. @return true or false.
equals
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
public String toString() { String coords1, coords2; if (this.length1 == 0) { coords1 = this.start1 + ",0"; } else if (this.length1 == 1) { coords1 = Integer.toString(this.start1 + 1); } else { coords1 = (this.start1 + 1) + "," + this.length1; } if (this.length2 == 0) { coords2 = this.start2 + ",0"; } else if (this.length2 == 1) { coords2 = Integer.toString(this.start2 + 1); } else { coords2 = (this.start2 + 1) + "," + this.length2; } StringBuilder text = new StringBuilder(); text.append("@@ -").append(coords1).append(" +").append(coords2).append(" @@\n"); // Escape the body of the patch with %xx notation. for (Diff aDiff : this.diffs) { switch (aDiff.operation) { case INSERT: text.append('+'); break; case DELETE: text.append('-'); break; case EQUAL: text.append(' '); break; } try { text.append(URLEncoder.encode(aDiff.text, "UTF-8").replace('+', ' ')).append( "\n"); } catch (UnsupportedEncodingException e) { // Not likely on modern system. throw new Error("This system does not support UTF-8.", e); } } return unescapeForEncodeUriCompatability(text.toString()); }
Emmulate GNU diff's format. Header: @@ -382,8 +481,9 @@ Indicies are printed as 1-based, not 0-based. @return The GNU diff string.
toString
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
private static String unescapeForEncodeUriCompatability(String str) { return str.replace("%21", "!").replace("%7E", "~").replace("%27", "'").replace("%28", "(") .replace("%29", ")").replace("%3B", ";").replace("%2F", "/").replace("%3F", "?") .replace("%3A", ":").replace("%40", "@").replace("%26", "&").replace("%3D", "=") .replace("%2B", "+").replace("%24", "$").replace("%2C", ",").replace("%23", "#"); }
Unescape selected chars for compatability with JavaScript's encodeURI. In speed critical applications this could be dropped since the receiving application will certainly decode these fine. Note that this function is case-sensitive. Thus "%3f" would not be unescaped. But this is ok because it is only called with the output of URLEncoder.encode which returns uppercase hex. Example: "%3F" -> "?", "%24" -> "$", etc. @param str The string to escape. @return The escaped string.
unescapeForEncodeUriCompatability
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/diff/DiffMatchPatch.java
MIT
protected Object findProxied(HibernateProxy proxy) { return proxy.getHibernateLazyInitializer().getImplementation(); }
Helper method for finding value being proxied, if it is available or if it is to be forced to be loaded.
findProxied
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/util/jackson/hibernate/HibernateProxySerializer.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/util/jackson/hibernate/HibernateProxySerializer.java
MIT
public String getEmail() { return this.email; }
Get the email associated with this Gravatar. @return the email associated with this Gravatar
getEmail
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public void setSize(int size) { if (size >= 0 && size < 512) { this.size = size; } }
Set the image size of this Gravatar in pixels. @param size size of image in pixels [1-512], 0 for default size
setSize
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public int getSize() { return this.size; }
Get the size set for this Gravatar. @return the size set for this Gravatar [1-512], 0 for default size
getSize
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public void setDefault(int dflt) { if (dflt >= DFLT_DEFAULT && dflt <= DFLT_BLANK) { // blank out the custom if one was set this.customDefault = null; this.dflt = dflt; } }
Set the image returned if there is no Gravatar for the email. @param dflt must be one of the DFLT_XXX constants
setDefault
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public int getDefault() { return this.dflt; }
Get the default image setting of this Gravatar. @return the default image setting of this Gravatar
getDefault
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public void setForceDefault(boolean forceDefault) { this.forceDefault = forceDefault; }
Sets whether the default Gravatar should always be returned. @param forceDefault true if the default Gravatar should always be returned
setForceDefault
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public boolean getForceDefault() { return this.forceDefault; }
Get whether this Gravatar is set to always return the default image. @return true if this Gravatar is set to always return the default image
getForceDefault
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public void setCustomDefault(String url) { try { if (url != null) { // UTF-8 should always be supported this.customDefault = URLEncoder.encode(url, "UTF-8"); this.dflt = DFLT_DEFAULT; } } catch (UnsupportedEncodingException e) { e.printStackTrace(); } }
Set the URL of a custom default image to use. @param url the URL of the custom default image to use
setCustomDefault
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public String getCustomDefault() { try { // UTF-8 should always be supported return this.customDefault == null ? null : URLDecoder.decode( this.customDefault, "UTF-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return null; }
Get the URL of the custom default image set for this Gravatar. @return the URL of the custom default image set, null if not set
getCustomDefault
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public void setRating(int rating) { if (rating >= RTNG_NONE && rating <= RTNG_X) { this.rating = rating; } }
Set the maximum allowed rating of the image to return. @param rating must be one of the RTNG_XXX constants
setRating
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public int getRating() { return this.rating; }
Get the maximum allowed rating of image set for this Gravatar. @return the rating set for this Gravatar
getRating
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public String getURL() { var str = new StringBuilder(); var url = OneDev.getInstance(SettingManager.class).getSystemSetting().getAvatarServiceUrl(); str.append(StringUtils.stripEnd(url, "/\\")).append("/"); str.append(this.hash); str.append(this.getOptions()); return str.toString(); }
Get the URL for this Gravatar, HTTPS if specified. true if HTTPS is desired @return URL for this Gravatar
getURL
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
private String getOptions() { StringBuilder opts = new StringBuilder(); opts.append("?"); // size if (this.size != 0) { opts.append("s="); opts.append(this.size); } // default if (this.dflt >= 0) { // check if we just added an option opts.append(opts.length() > 1 ? "&" : ""); opts.append("d="); opts.append(dfltImages[this.dflt]); } // custom default if (this.customDefault != null) { // check if we just added an option opts.append(opts.length() > 1 ? "&" : ""); opts.append("d="); opts.append(this.customDefault); } // force default if (this.forceDefault) { // check if we just added an option opts.append(opts.length() > 1 ? "&" : ""); opts.append("f=y"); } // rating if (this.rating != RTNG_NONE) { // check if we just added an option opts.append(opts.length() > 1 ? "&" : ""); opts.append("r="); opts.append(ratings[this.rating]); } return (opts.length() > 1) ? opts.toString() : ""; }
Build the options string to append to the URL. @return the options portion of the URL
getOptions
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public static String getURL(String email) { return AvatarService.getURL(email, 0, DFLT_DEFAULT, false, RTNG_NONE); }
Get the optionally HTTPS Gravatar URL for a particular email. @param email the email for this Gravatar @return the URL of the Gravatar
getURL
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public static String getURL(String email, int size) { return AvatarService.getURL(email, size, DFLT_DEFAULT); }
Get the Gravatar URL for an email and with a specified size @param email the email for this Gravatar @param size the desired size for this Gravatar [1-512] @return the URL of the Gravatar
getURL
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public static String getURL(String email, int size, int dflt) { return AvatarService.getURL(email, size, dflt, RTNG_NONE); }
Get the Gravatar for an email with a specified size and default image. @param email the email for this Gravatar @param size the desired size for this Gravatar [1-512] @param dflt must be one of the DFLT_XXX constants @return the URL of the Gravatar
getURL
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public static String getURL(String email, int size, int dflt, int rating) { return AvatarService.getURL(email, size, dflt, false, rating); }
Get the Gravatar for an email with a specified size, default image, and maximum rating. @param email the email for this Gravatar @param size the desired size for this Gravatar [1-512] @param dflt must be one of the DFLT_XXX constants @param rating must be one of the RTNG_XXX constants @return the URL of the Gravatar
getURL
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public static String getURL(String email, int size, int dflt, boolean forceDefault, int rating) { AvatarService g = new AvatarService(email); g.setSize(size); g.setDefault(dflt); g.setForceDefault(forceDefault); g.setRating(rating); return g.getURL(); }
Get the Gravatar for an email with a specified size, custom default, maximum rating, and specified force default option, and HTTPS preference. @param email the email for this Gravatar @param size the desired size for this Gravatar [1-512] @param forceDefault true if the default should always be returned @param rating must be one of the RTNG_XXX constants @return the URL of the Gravatar
getURL
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
public static String getURL(String email, int size, String customDefault, boolean forceDefault, int rating) { AvatarService g = new AvatarService(email); g.setSize(size); g.setCustomDefault(customDefault); g.setForceDefault(forceDefault); g.setRating(rating); return g.getURL(); }
Get the Gravatar for an email with a specified size, custom default, maximum rating, specified force default option, and HTTPS preference. @param email the email for this Gravatar @param size the desired size for this Gravatar [1-512] @param customDefault URL of custom default image @param forceDefault true if the default should always be returned @param rating must be one of the RTNG_XXX constants @return the URL of the Gravatar
getURL
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
private static String toHexString(byte[] buf) { BigInteger bi = new BigInteger(1, buf); return String.format("%0" + (buf.length << 1) + "X", bi); }
Convert an array of bytes to a Hex String @param buf the bytes to convert @return the Hex String of the bytes
toHexString
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/avatar/AvatarService.java
MIT
@Nullable protected Optional<String> describe(ParseExpect parseExpect, String suggestedLiteral) { if (StringUtils.isNotBlank(suggestedLiteral)) return Optional.absent(); else return Optional.of(_T("space")); }
Describe suggested literal @param suggestedLiteral suggested literal @return an optional containing description of the literal, or <tt>null</tt> to suppress the suggestion
describe
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/behavior/inputassist/ANTLRAssistBehavior.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/behavior/inputassist/ANTLRAssistBehavior.java
MIT
protected boolean isFuzzySuggestion(InputCompletion suggestion) { return false; }
Given an input content, anchor is index of the char at which place to display left side of the suggestion window. This makes it possible to make the suggestion window moves as one types, instead of always staying at a fixed place @param inputContent @return
isFuzzySuggestion
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/behavior/inputassist/InputAssistBehavior.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/behavior/inputassist/InputAssistBehavior.java
MIT
@Override protected CharSequence getOnClickScript(CharSequence url) { var script = "onedev.server.viewState.getFromViewAndSetToHistory();"; if (scrollTopKey != null) { script += "" + "localStorage.setItem('" + scrollTopKey + "', Math.floor($(this).closest('.autofit').scrollTop()).toString());"; } return script; }
This class stores view state (scroll position, cursor etc) before leaving current page, so that the view state can be restored when we go back to current page @author robin @param <T>
getOnClickScript
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/component/link/ViewStateAwarePageLink.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/component/link/ViewStateAwarePageLink.java
MIT
public final void setProvider(ChoiceProvider<T> provider) { this.provider = provider; }
Sets the choice provider @param provider
setProvider
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/component/select2/AbstractSelect2Choice.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/component/select2/AbstractSelect2Choice.java
MIT
protected String getJquerySafeMarkupId() { return getMarkupId().replace(".", "\\\\."); }
Gets the markup id that is safe to use in jQuery by escaping dots in the default {@link #getMarkup()} @return markup id
getJquerySafeMarkupId
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/component/select2/AbstractSelect2Choice.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/component/select2/AbstractSelect2Choice.java
MIT
@Override public void detach() { }
Converts a list of choice ids back into application's choice objects. When the choice provider is attached to a single-select component the {@code ids} collection will contain exactly one id, and a collection containing exactly one choice should be returned. @param ids collection containing choice ids @return collection containing application choice objects
detach
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/component/select2/ChoiceProvider.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/component/select2/ChoiceProvider.java
MIT
public Response<T> setResults(List<T> results) { this.results = results; return this; }
Sets the results collection. Collection can also be incrementally built using {@link #add(Object)} and {@link #addAll(Collection)} methods. @param results @return {@code this} for chaining
setResults
java
theonedev/onedev
server-core/src/main/java/io/onedev/server/web/component/select2/Response.java
https://github.com/theonedev/onedev/blob/master/server-core/src/main/java/io/onedev/server/web/component/select2/Response.java
MIT