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author | Egil Moeller <egil.moller@freecode.no> | 2010-03-22 00:16:53 +0100 |
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committer | Egil Moeller <egil.moller@freecode.no> | 2010-03-22 00:16:53 +0100 |
commit | fc00cfedd6c25d1634a1e0d28a7b7bc5f42e1cd7 (patch) | |
tree | 928419d6bfe794865e4b8f0634bd792f795c4b8a /trunk/infrastructure/com.etherpad/easysync2support.scala | |
parent | 0fdab3db005c4fa31fb8306b573c0b35073d3e56 (diff) | |
parent | d56b9b3b82cdebcaeb00eec0fcb4326ad21adaa8 (diff) | |
download | etherpad-fc00cfedd6c25d1634a1e0d28a7b7bc5f42e1cd7.tar.gz etherpad-fc00cfedd6c25d1634a1e0d28a7b7bc5f42e1cd7.tar.xz etherpad-fc00cfedd6c25d1634a1e0d28a7b7bc5f42e1cd7.zip |
Merge branch 'master' into plugin-framework
Diffstat (limited to 'trunk/infrastructure/com.etherpad/easysync2support.scala')
-rw-r--r-- | trunk/infrastructure/com.etherpad/easysync2support.scala | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/trunk/infrastructure/com.etherpad/easysync2support.scala b/trunk/infrastructure/com.etherpad/easysync2support.scala deleted file mode 100644 index 9f1c527..0000000 --- a/trunk/infrastructure/com.etherpad/easysync2support.scala +++ /dev/null @@ -1,167 +0,0 @@ -/** - * Copyright 2009 Google Inc. - * - * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS-IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package com.etherpad; - -object Easysync2Support { - - def numToString(d: Int): String = java.lang.Integer.toString(d.toInt, 36); // lowercase - def stringToNum(s: String): Int = java.lang.Integer.parseInt(s, 36); - - def opAssembler() = new OpAssembler(); - - class OpAssembler() { - val buf = new StringBuilder(1000); - def append(op: Op) { - append(op.opcode, op.chars, op.lines, op.attribs); - } - def append(opcode: String, chars: Int, lines: Int, attribs: String) { - buf.append(attribs); - if (lines > 0) { - buf.append('|'); - buf.append(numToString(lines)); - } - buf.append(opcode); - buf.append(numToString(chars)); - } - override def toString(): String = buf.toString; - def clear() { buf.clear; } - } - - def isAlphanum(c: Char) = (c >= '0' && c <= '9' || c >= 'a' && c <= 'z'); - - case object OpParseError extends Error; - - def nextOpInString(str: String, startIndex: Int): Object = { - var i = startIndex; - - try { - def lookingAt(c: Char) = (i < str.length && str.charAt(i) == c); - def lookingAtAlphanum() = (i < str.length && isAlphanum(str.charAt(i))); - def atEnd() = (i >= str.length); - def readAlphanum(): Int = { - if (! lookingAtAlphanum()) { - throw OpParseError; - } - val start = i; - while (lookingAtAlphanum()) { - i += 1; - } - val end = i; - stringToNum(str.substring(start, end)); - } - - while (lookingAt('*')) { - i += 1; - if (! lookingAtAlphanum()) { - throw OpParseError; - } - while (lookingAtAlphanum()) { - i += 1; - } - } - val attribsEnd = i; - - var lines_ = 0; - if (lookingAt('|')) { - i += 1; - lines_ = readAlphanum(); - } - - if (lookingAt('?')) { - return new { val opcode = "?"; } - } - if (! (lookingAt('+') || lookingAt('-') || lookingAt('='))) { - throw OpParseError; - } - val opcode_ = str.substring(i, i+1); - i += 1; - val chars_ = readAlphanum(); - - return new Op(opcode_, chars_, lines_, str.substring(startIndex, attribsEnd)) { - val lastIndex = i; - }; - } - catch { case OpParseError => null } - } - - case class Op(var opcode: String, var chars: Int, var lines: Int, var attribs: String); - def newOp() = Op("", 0, 0, ""); - def clearOp(op: Op) { op.opcode = ""; op.chars = 0; op.lines = 0; op.attribs = ""; } - - // ported from easysync2.js - class MergingOpAssembler { - val assem = opAssembler(); - var bufOp = newOp(); - - var bufOpAdditionalCharsAfterNewline = 0; - - def flush(isEndDocument: Boolean) { - if (bufOp.opcode.length > 0) { - if (isEndDocument && bufOp.opcode == "=" && bufOp.attribs.length == 0) { - // final merged keep, leave it implicit - } - else { - assem.append(bufOp); - if (bufOpAdditionalCharsAfterNewline > 0) { - bufOp.chars = bufOpAdditionalCharsAfterNewline; - bufOp.lines = 0; - assem.append(bufOp); - bufOpAdditionalCharsAfterNewline = 0; - } - } - bufOp.opcode = ""; - } - } - def append(opcode: String, chars: Int, lines: Int, attribs: String) { - if (chars > 0) { - if (bufOp.opcode == opcode && bufOp.attribs == attribs) { - if (lines > 0) { - // bufOp and additional chars are all mergeable into a multi-line op - bufOp.chars += bufOpAdditionalCharsAfterNewline + chars; - bufOp.lines += lines; - bufOpAdditionalCharsAfterNewline = 0; - } - else if (bufOp.lines == 0) { - // both bufOp and op are in-line - bufOp.chars += chars; - } - else { - // append in-line text to multi-line bufOp - bufOpAdditionalCharsAfterNewline += chars; - } - } - else { - flush(false); - bufOp = Op(opcode, chars, lines, attribs); - } - } - } - def endDocument() { - flush(true); - } - override def toString() = { - flush(false); - assem.toString(); - } - def clear() { - assem.clear(); - clearOp(bufOp); - } - } - - def mergingOpAssembler() = new MergingOpAssembler(); -} |