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//
// Indent.cs
//
// Author:
// Mike Krüger <mkrueger@novell.com>
//
// Copyright (c) 2010 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.Collections.Generic;
namespace ICSharpCode.NRefactory.CSharp
{
public enum IndentType
{
Block,
DoubleBlock,
Continuation,
Label,
Empty
}
public class Indent
{
readonly Stack<IndentType> indentStack = new Stack<IndentType>();
readonly TextEditorOptions options;
int curIndent;
public int CurIndent {
get {
return curIndent;
}
}
public Indent(TextEditorOptions options)
{
this.options = options;
Reset();
}
Indent(TextEditorOptions options, Stack<IndentType> indentStack, int curIndent) : this(options)
{
this.indentStack = indentStack;
this.curIndent = curIndent;
}
public Indent Clone()
{
var result = new Indent(options, new Stack<IndentType>(indentStack), curIndent);
result.indentString = indentString;
return result;
}
public void Reset()
{
curIndent = 0;
indentString = "";
indentStack.Clear();
}
public void Push(IndentType type)
{
indentStack.Push(type);
curIndent += GetIndent(type);
Update();
}
public void Push(Indent indent)
{
foreach (var i in indent.indentStack)
Push(i);
}
public void Pop()
{
curIndent -= GetIndent(indentStack.Pop());
Update();
}
public int Count {
get {
return indentStack.Count;
}
}
public IndentType Peek()
{
return indentStack.Peek();
}
int GetIndent(IndentType indentType)
{
switch (indentType) {
case IndentType.Block:
return options.IndentSize;
case IndentType.DoubleBlock:
return options.IndentSize * 2;
case IndentType.Continuation:
return options.ContinuationIndent;
case IndentType.Label:
return options.LabelIndent;
case IndentType.Empty:
return 0;
default:
throw new ArgumentOutOfRangeException();
}
}
void Update()
{
if (options.TabsToSpaces) {
indentString = new string(' ', curIndent + ExtraSpaces);
return;
}
indentString = new string('\t', curIndent / options.TabSize) + new string(' ', curIndent % options.TabSize) + new string(' ', ExtraSpaces);
}
int extraSpaces;
public int ExtraSpaces {
get {
return extraSpaces;
}
set {
if (value < 0)
throw new ArgumentOutOfRangeException("ExtraSpaces >= 0 but was " + value);
extraSpaces = value;
Update();
}
}
string indentString;
public string IndentString {
get {
return indentString;
}
}
public override string ToString()
{
return string.Format("[Indent: curIndent={0}]", curIndent);
}
}
}
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