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//
// Selection.cs
//
// Author:
// Mike Krüger <mkrueger@xamarin.com>
//
// Copyright (c) 2016 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;
namespace MonoDevelop.Ide.Editor
{
public readonly struct Selection : IEquatable<Selection>
{
public static readonly Selection Empty = new Selection (true);
public bool IsEmpty {
get {
return Anchor.IsEmpty;
}
}
public DocumentLocation Anchor { get; }
public DocumentLocation Lead { get; }
public int MinLine {
get {
return System.Math.Min (Anchor.Line, Lead.Line);
}
}
public int MaxLine {
get {
return System.Math.Max (Anchor.Line, Lead.Line);
}
}
public DocumentLocation Start {
get {
return Anchor < Lead ? Anchor : Lead;
}
}
public DocumentLocation End {
get {
return Anchor < Lead ? Lead : Anchor;
}
}
readonly SelectionMode selectionMode;
public SelectionMode SelectionMode {
get {
return selectionMode;
}
}
public bool Contains (DocumentLocation loc)
{
return Anchor <= loc && loc <= Lead || Lead < loc && loc < Anchor;
}
public bool Contains (int line, int column)
{
return Contains (new DocumentLocation (line, column));
}
Selection (bool empty)
{
Anchor = Lead = DocumentLocation.Empty;
selectionMode = SelectionMode.Normal;
}
public Selection (int anchorLine, int anchorColumn, int leadLine, int leadColumn, SelectionMode mode = SelectionMode.Normal) : this (new DocumentLocation (anchorLine, anchorColumn), new DocumentLocation (leadLine, leadColumn), mode)
{
}
public Selection (DocumentLocation anchor, DocumentLocation lead, SelectionMode selectionMode = SelectionMode.Normal)
{
if (anchor.Line < DocumentLocation.MinLine || anchor.Column < DocumentLocation.MinColumn)
throw new ArgumentOutOfRangeException ("anchor", anchor + " is out of range.");
if (lead.Line < DocumentLocation.MinLine || lead.Column < DocumentLocation.MinColumn)
throw new ArgumentOutOfRangeException ("lead", lead + " is out of range.");
this.Anchor = anchor;
this.Lead = lead;
this.selectionMode = selectionMode;
}
public Selection WithLead (DocumentLocation newLead)
{
return new Selection (Anchor, newLead, SelectionMode);
}
public Selection WithAnchor (DocumentLocation newAnchor)
{
return new Selection (newAnchor, Lead, SelectionMode);
}
public Selection WithRange (DocumentLocation newAnchor, DocumentLocation newLead)
{
return new Selection (newAnchor, newLead, SelectionMode);
}
public Selection WithSelectionMode (SelectionMode newSelectionMode)
{
return new Selection (Anchor, Lead, newSelectionMode);
}
public override bool Equals (object obj)
{
if (!(obj is Selection))
return false;
return Equals ((Selection)obj);
}
public bool Equals (Selection other)
{
return Anchor == other.Anchor && Lead == other.Lead && SelectionMode == other.SelectionMode;
}
public bool IsSelected (DocumentLocation loc)
{
return Anchor <= loc && loc <= Lead || Lead <= loc && loc <= Anchor;
}
public bool IsSelected (int line, int column)
{
return IsSelected (new DocumentLocation (line, column));
}
public bool IsSelected (DocumentLocation start, DocumentLocation end)
{
return IsSelected (start) && IsSelected (end);
}
public bool IsSelected (int startLine, int startColumn, int endLine, int endColumn)
{
return IsSelected (new DocumentLocation (startLine, startColumn), new DocumentLocation (endLine, endColumn));
}
public override int GetHashCode ()
{
unchecked {
return Anchor.GetHashCode () ^ Lead.GetHashCode ();
}
}
public override string ToString ()
{
return string.Format ("[Selection: Anchor={0}, Lead={1}, MinLine={2}, MaxLine={3}, SelectionMode={4}]", Anchor, Lead, MinLine, MaxLine, SelectionMode);
}
internal bool ContainsLine (int lineNr)
{
return Anchor.Line <= lineNr && lineNr <= Lead.Line || Lead.Line <= lineNr && lineNr <= Anchor.Line;
}
}
}
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