| // Copyright (C) 2013 The Android Open Source Project |
| // |
| // 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.google.gerrit.client.diff; |
| |
| import com.google.gwt.core.client.JsArrayString; |
| |
| import net.codemirror.lib.LineCharacter; |
| |
| /** An iterator for intraline edits */ |
| class EditIterator { |
| private final JsArrayString lines; |
| private final int startLine; |
| private int currLineIndex; |
| private int currLineOffset; |
| |
| EditIterator(JsArrayString lineArray, int start) { |
| lines = lineArray; |
| startLine = start; |
| } |
| |
| LineCharacter advance(int numOfChar) { |
| while (currLineIndex < lines.length()) { |
| int lengthWithNewline = |
| lines.get(currLineIndex).length() - currLineOffset + 1; |
| if (numOfChar < lengthWithNewline) { |
| LineCharacter at = LineCharacter.create( |
| startLine + currLineIndex, |
| numOfChar + currLineOffset); |
| currLineOffset += numOfChar; |
| return at; |
| } |
| numOfChar -= lengthWithNewline; |
| advanceLine(); |
| if (numOfChar == 0) { |
| return LineCharacter.create(startLine + currLineIndex, 0); |
| } |
| } |
| throw new IllegalStateException("EditIterator index out of bound"); |
| } |
| |
| private void advanceLine() { |
| currLineIndex++; |
| currLineOffset = 0; |
| } |
| } |