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//
// DocumentRegion.cs
//
// Author:
// Mike Krüger <mkrueger@xamarin.com>
//
// Copyright (c) 2012 Xamarin Inc. (http://xamarin.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 MonoDevelop.Core.Text;
using Microsoft.CodeAnalysis;
namespace MonoDevelop.Ide.Editor
{
/// <summary>
/// An (Begin, End) pair representing a document span. It's a TextSegment working with lines & columns instead of offsets.
/// </summary>
public struct DocumentRegion : IEquatable<DocumentRegion>
{
public static readonly DocumentRegion Empty = new DocumentRegion (0, 0, 0, 0);
/// <summary>
/// Gets a value indicating whether this DocumentRegion is empty.
/// </summary>
public bool IsEmpty {
get {
return beginLine < 1;
}
}
readonly int beginLine;
public int BeginLine {
get {
return beginLine;
}
}
readonly int beginColumn;
public int BeginColumn {
get {
return beginColumn;
}
}
readonly int endLine;
public int EndLine {
get {
return endLine;
}
}
readonly int endColumn;
public int EndColumn {
get {
return endColumn;
}
}
public DocumentLocation Begin {
get {
return new DocumentLocation (BeginLine, BeginColumn);
}
}
public DocumentLocation End {
get {
return new DocumentLocation (EndLine, EndColumn);
}
}
public DocumentRegion (int beginLine, int beginColumn, int endLine, int endColumn)
{
this.beginLine = beginLine;
this.beginColumn = beginColumn;
this.endLine = endLine;
this.endColumn = endColumn;
}
public DocumentRegion (DocumentLocation begin, DocumentLocation end)
{
beginLine = begin.Line;
beginColumn = begin.Column;
endLine = end.Line;
endColumn = end.Column;
}
public bool Contains (DocumentLocation location)
{
return Begin <= location && location < End;
}
public bool Contains (int line, int column)
{
return Contains (new DocumentLocation (line, column));
}
public bool IsInside (DocumentLocation location)
{
return Begin <= location && location <= End;
}
public bool IsInside (int line, int column)
{
return IsInside (new DocumentLocation (line, column));
}
public override bool Equals (object obj)
{
return obj is DocumentRegion && Equals ((DocumentRegion)obj);
}
public override int GetHashCode ()
{
return unchecked (Begin.GetHashCode () ^ End.GetHashCode ());
}
public bool Equals (DocumentRegion other)
{
return Begin == other.Begin && End == other.End;
}
public static bool operator == (DocumentRegion left, DocumentRegion right)
{
return left.Equals(right);
}
public static bool operator != (DocumentRegion left, DocumentRegion right)
{
return !left.Equals(right);
}
public TextSegment GetSegment (TextEditor document)
{
if (document == null)
throw new ArgumentNullException ("document");
var begin = document.LocationToOffset (Begin);
var end = document.LocationToOffset (End);
return new TextSegment (begin, end - begin);
}
public static implicit operator Microsoft.CodeAnalysis.Text.LinePositionSpan (DocumentRegion location)
{
return new Microsoft.CodeAnalysis.Text.LinePositionSpan (location.Begin, location.End);
}
public static implicit operator DocumentRegion(Microsoft.CodeAnalysis.Text.LinePositionSpan location)
{
return new DocumentRegion (location.Start, location.End);
}
public static implicit operator DocumentRegion(FileLinePositionSpan location)
{
return new DocumentRegion (location.StartLinePosition, location.EndLinePosition);
}
public override string ToString ()
{
return string.Format ("[DocumentRegion: Begin={0}, End={1}]", Begin, End);
}
}
}
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