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// <file>
// <copyright see="prj:///doc/copyright.txt"/>
// <license see="prj:///doc/license.txt"/>
// <owner name="Mike Krüger" email="mike@icsharpcode.net"/>
// <version>$Revision: 2522 $</version>
// </file>
using System;
using System.Collections;
using System.Text;
namespace ICSharpCode.NRefactory.PrettyPrinter
{
/// <summary>
/// Base class of output formatters.
/// </summary>
public abstract class AbstractOutputFormatter : IOutputFormatter
{
StringBuilder text = new StringBuilder();
int indentationLevel = 0;
bool indent = true;
bool doNewLine = true;
AbstractPrettyPrintOptions prettyPrintOptions;
public int IndentationLevel {
get {
return indentationLevel;
}
set {
indentationLevel = value;
}
}
public string Text {
get {
return text.ToString();
}
}
public int TextLength {
get {
return text.Length;
}
}
public bool DoIndent {
get {
return indent;
}
set {
indent = value;
}
}
public bool DoNewLine {
get {
return doNewLine;
}
set {
doNewLine = value;
}
}
protected AbstractOutputFormatter(AbstractPrettyPrintOptions prettyPrintOptions)
{
this.prettyPrintOptions = prettyPrintOptions;
}
public void Indent()
{
if (DoIndent) {
int indent = 0;
while (indent < prettyPrintOptions.IndentSize * indentationLevel) {
char ch = prettyPrintOptions.IndentationChar;
if (ch == '\t' && indent + prettyPrintOptions.TabSize > prettyPrintOptions.IndentSize * indentationLevel) {
ch = ' ';
}
text.Append(ch);
if (ch == '\t') {
indent += prettyPrintOptions.TabSize;
} else {
++indent;
}
}
}
}
public void Space()
{
text.Append(' ');
}
internal int lastLineStart = 0;
internal int lineBeforeLastStart = 0;
public bool LastCharacterIsNewLine {
get {
return text.Length == lastLineStart;
}
}
public bool LastCharacterIsWhiteSpace {
get {
return text.Length == 0 || char.IsWhiteSpace(text[text.Length - 1]);
}
}
public virtual void NewLine()
{
if (DoNewLine) {
if (!LastCharacterIsNewLine) {
lineBeforeLastStart = lastLineStart;
}
text.AppendLine();
lastLineStart = text.Length;
}
}
public virtual void EndFile()
{
}
protected void WriteLineInPreviousLine(string txt, bool forceWriteInPreviousBlock)
{
WriteInPreviousLine(txt + Environment.NewLine, forceWriteInPreviousBlock);
}
protected void WriteInPreviousLine(string txt, bool forceWriteInPreviousBlock)
{
if (txt.Length == 0) return;
bool lastCharacterWasNewLine = LastCharacterIsNewLine;
if (lastCharacterWasNewLine) {
if (forceWriteInPreviousBlock == false) {
if (txt != Environment.NewLine) Indent();
text.Append(txt);
lineBeforeLastStart = lastLineStart;
lastLineStart = text.Length;
return;
}
lastLineStart = lineBeforeLastStart;
}
string lastLine = text.ToString(lastLineStart, text.Length - lastLineStart);
text.Remove(lastLineStart, text.Length - lastLineStart);
if (txt != Environment.NewLine) {
if (forceWriteInPreviousBlock) ++indentationLevel;
Indent();
if (forceWriteInPreviousBlock) --indentationLevel;
}
text.Append(txt);
lineBeforeLastStart = lastLineStart;
lastLineStart = text.Length;
text.Append(lastLine);
if (lastCharacterWasNewLine) {
lineBeforeLastStart = lastLineStart;
lastLineStart = text.Length;
}
}
/// <summary>
/// Prints a text that cannot be inserted before using WriteInPreviousLine
/// into the current line
/// </summary>
protected void PrintSpecialText(string specialText)
{
lineBeforeLastStart = text.Length;
text.Append(specialText);
lastLineStart = text.Length;
}
public void PrintTokenList(ArrayList tokenList)
{
foreach (int token in tokenList) {
PrintToken(token);
Space();
}
}
public abstract void PrintComment(Comment comment, bool forceWriteInPreviousBlock);
public virtual void PrintPreprocessingDirective(PreprocessingDirective directive, bool forceWriteInPreviousBlock)
{
if (string.IsNullOrEmpty(directive.Arg))
WriteLineInPreviousLine(directive.Cmd, forceWriteInPreviousBlock);
else
WriteLineInPreviousLine(directive.Cmd + " " + directive.Arg, forceWriteInPreviousBlock);
}
public void PrintBlankLine(bool forceWriteInPreviousBlock)
{
WriteInPreviousLine(Environment.NewLine, forceWriteInPreviousBlock);
}
public abstract void PrintToken(int token);
public void PrintText(string text)
{
this.text.Append(text);
}
public abstract void PrintIdentifier(string identifier);
}
}
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