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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.Activities.Debugger
{
using System;
using System.Activities.Debugger.Symbol;
using System.Diagnostics;
using System.Linq;
using System.Runtime;
// Identifies a specific location in the target source code.
//
// This source information is used in creating PDBs, which will be passed to the debugger,
// which will resolve the source file based off its own source paths.
// Source ranges can:
// * refer to just an entire single line.
// * can be a subset within a single line (when StartLine == EndLine)
// * can also span multiple lines.
// When column info is provided, the debugger will highlight the characters starting at the start line and start column,
// and going up to but not including the character specified by the end line and end column.
[Fx.Tag.SecurityNote(Miscellaneous = "RequiresReview - Our partial trust mechanisms require that this class remain Immutable. Do not add code that allows an instance of this class to change after creation without strict review.")]
[DebuggerNonUserCode]
[Serializable]
[Fx.Tag.XamlVisible(false)]
public class SourceLocation
{
string fileName;
int startLine;
int endLine;
int startColumn;
int endColumn;
byte[] checksum;
// Define a source location from a filename and line-number (1-based).
// This is a convenience constructor to specify the entire line.
// This does not load the source file to determine column ranges.
public SourceLocation(string fileName, int line)
: this(fileName, line, 1, line, int.MaxValue)
{
}
public SourceLocation(
string fileName,
int startLine,
int startColumn,
int endLine,
int endColumn)
: this(fileName, null, startLine, startColumn, endLine, endColumn)
{
}
// Define a source location in a file.
// Line/Column are 1-based.
internal SourceLocation(
string fileName,
byte[] checksum,
int startLine,
int startColumn,
int endLine,
int endColumn)
{
if (startLine <= 0)
{
throw FxTrace.Exception.Argument("startLine", SR.InvalidSourceLocationLineNumber("startLine", startLine));
}
if (startColumn <= 0)
{
throw FxTrace.Exception.Argument("startColumn", SR.InvalidSourceLocationColumn("startColumn", startColumn));
}
if (endLine <= 0)
{
throw FxTrace.Exception.Argument("endLine", SR.InvalidSourceLocationLineNumber("endLine", endLine));
}
if (endColumn <= 0)
{
throw FxTrace.Exception.Argument("endColumn", SR.InvalidSourceLocationColumn("endColumn", endColumn));
}
if (startLine > endLine)
{
throw FxTrace.Exception.ArgumentOutOfRange("endLine", endLine, SR.OutOfRangeSourceLocationEndLine(startLine));
}
if ((startLine == endLine) && (startColumn > endColumn))
{
throw FxTrace.Exception.ArgumentOutOfRange("endColumn", endColumn, SR.OutOfRangeSourceLocationEndColumn(startColumn));
}
this.fileName = (fileName != null) ? fileName.ToUpperInvariant() : null;
this.startLine = startLine;
this.endLine = endLine;
this.startColumn = startColumn;
this.endColumn = endColumn;
this.checksum = checksum;
}
public string FileName
{
get { return this.fileName; }
}
// Get the 1-based start line.
public int StartLine
{
get { return this.startLine; }
}
// Get the 1-based starting column.
public int StartColumn
{
get { return this.startColumn; }
}
// Get the 1-based end line. This should be greater or equal to StartLine.
public int EndLine
{
get { return this.endLine; }
}
// Get the 1-based ending column.
public int EndColumn
{
get { return this.endColumn; }
}
// get the checksum of the source file
internal byte[] Checksum
{
get { return this.checksum; }
}
public bool IsSingleWholeLine
{
get
{
return this.endColumn == int.MaxValue && this.startLine == this.endLine && this.startColumn == 1;
}
}
// Equality comparison function. This checks for strict equality and
// not for superset or subset relationships.
public override bool Equals(object obj)
{
SourceLocation rsl = obj as SourceLocation;
if (rsl == null)
{
return false;
}
if (this.FileName != rsl.FileName)
{
return false;
}
if (this.StartLine != rsl.StartLine ||
this.StartColumn != rsl.StartColumn ||
this.EndLine != rsl.EndLine ||
this.EndColumn != rsl.EndColumn)
{
return false;
}
if (this.Checksum == null ^ rsl.Checksum == null)
{
return false;
}
else if ((this.Checksum != null && rsl.Checksum != null) && !this.Checksum.SequenceEqual(rsl.Checksum))
{
return false;
}
// everything matches
return true;
}
// Get a hash code.
public override int GetHashCode()
{
return (string.IsNullOrEmpty(this.FileName) ? 0 : this.FileName.GetHashCode()) ^
this.StartLine.GetHashCode() ^
this.StartColumn.GetHashCode() ^
((this.Checksum == null) ? 0 : SymbolHelper.GetHexStringFromChecksum(this.Checksum).GetHashCode());
}
internal static bool IsValidRange(int startLine, int startColumn, int endLine, int endColumn)
{
return
(startLine > 0) && (startColumn > 0) && (endLine > 0) && (endColumn > 0) &&
((startLine < endLine) || (startLine == endLine) && (startColumn < endColumn));
}
}
}
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