1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188
|
/* -*- Mode: java; tab-width: 4; indent-tabs-mode: 1; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Rhino code, released
* May 6, 1999.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Igor Bukanov
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
package org.mozilla.javascript.tools.idswitch;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
public class FileBody {
private static class ReplaceItem {
ReplaceItem next;
int begin;
int end;
String replacement;
ReplaceItem(int begin, int end, String text) {
this.begin = begin;
this.end = end;
this.replacement = text;
}
}
private char[] buffer = new char[1 << 14]; // 16K
private int bufferEnd;
private int lineBegin;
private int lineEnd;
private int nextLineStart;
private int lineNumber;
ReplaceItem firstReplace;
ReplaceItem lastReplace;
public char[] getBuffer() { return buffer; }
public void readData(Reader r) throws IOException {
int capacity = buffer.length;
int offset = 0;
for (;;) {
int n_read = r.read(buffer, offset, capacity - offset);
if (n_read < 0) { break; }
offset += n_read;
if (capacity == offset) {
capacity *= 2;
char[] tmp = new char[capacity];
System.arraycopy(buffer, 0, tmp, 0, offset);
buffer = tmp;
}
}
bufferEnd = offset;
}
public void writeInitialData(Writer w) throws IOException {
w.write(buffer, 0, bufferEnd);
}
public void writeData(Writer w) throws IOException {
int offset = 0;
for (ReplaceItem x = firstReplace; x != null; x = x.next) {
int before_replace = x.begin - offset;
if (before_replace > 0) {
w.write(buffer, offset, before_replace);
}
w.write(x.replacement);
offset = x.end;
}
int tail = bufferEnd - offset;
if (tail != 0) {
w.write(buffer, offset, tail);
}
}
public boolean wasModified() { return firstReplace != null; }
public boolean setReplacement(int begin, int end, String text) {
if (equals(text, buffer, begin, end)) { return false; }
ReplaceItem item = new ReplaceItem(begin, end, text);
if (firstReplace == null) {
firstReplace = lastReplace = item;
}
else if (begin < firstReplace.begin) {
item.next = firstReplace;
firstReplace = item;
}
else {
ReplaceItem cursor = firstReplace;
ReplaceItem next = cursor.next;
while (next != null) {
if (begin < next.begin) {
item.next = next;
cursor.next = item;
break;
}
cursor = next;
next = next.next;
}
if (next == null) {
lastReplace.next = item;
}
}
return true;
}
public int getLineNumber() { return lineNumber; }
public int getLineBegin() { return lineBegin; }
public int getLineEnd() { return lineEnd; }
public void startLineLoop() {
lineNumber = 0;
lineBegin = lineEnd = nextLineStart = 0;
}
public boolean nextLine() {
if (nextLineStart == bufferEnd) {
lineNumber = 0; return false;
}
int i; int c = 0;
for (i = nextLineStart; i != bufferEnd; ++i) {
c = buffer[i];
if (c == '\n' || c == '\r') { break; }
}
lineBegin = nextLineStart;
lineEnd = i;
if (i == bufferEnd) {
nextLineStart = i;
}
else if (c == '\r' && i + 1 != bufferEnd && buffer[i + 1] == '\n') {
nextLineStart = i + 2;
}
else {
nextLineStart = i + 1;
}
++lineNumber;
return true;
}
private static boolean equals(String str, char[] array, int begin, int end)
{
if (str.length() == end - begin) {
for (int i = begin, j = 0; i != end; ++i, ++j) {
if (array[i] != str.charAt(j)) { return false; }
}
return true;
}
return false;
}
}
|