91 lines
2.8 KiB
C#
91 lines
2.8 KiB
C#
|
/*
|
||
|
|
Copyright (C) 2014-2019 de4dot@gmail.com
|
||
|
|
|
||
|
|
This file is part of dnSpy
|
||
|
|
|
||
|
|
dnSpy is free software: you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU General Public License as published by
|
||
|
|
the Free Software Foundation, either version 3 of the License, or
|
||
|
|
(at your option) any later version.
|
||
|
|
|
||
|
|
dnSpy is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
GNU General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with dnSpy. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
using System;
|
||
|
|
using System.Collections.Generic;
|
||
|
|
using Microsoft.VisualStudio.Text;
|
||
|
|
|
||
|
|
namespace dnSpy.Contracts.Text {
|
||
|
|
sealed class CachedTextColorsCollection {
|
||
|
|
public static readonly CachedTextColorsCollection Empty = new CachedTextColorsCollection().Freeze();
|
||
|
|
public int Count => colorsList.Count;
|
||
|
|
public int TextLength => currentOffset;
|
||
|
|
public SpanData<object> this[int index] => colorsList[index];
|
||
|
|
|
||
|
|
readonly List<SpanData<object>> colorsList;
|
||
|
|
int currentOffset;
|
||
|
|
bool frozen;
|
||
|
|
|
||
|
|
public CachedTextColorsCollection() => colorsList = new List<SpanData<object>>();
|
||
|
|
|
||
|
|
public CachedTextColorsCollection Freeze() {
|
||
|
|
frozen = true;
|
||
|
|
return this;
|
||
|
|
}
|
||
|
|
|
||
|
|
public void Append(object color, string text) {
|
||
|
|
if (frozen)
|
||
|
|
throw new InvalidOperationException("Instance is frozen");
|
||
|
|
if (text is null)
|
||
|
|
throw new ArgumentNullException(nameof(text));
|
||
|
|
Append(color, text, 0, text.Length);
|
||
|
|
}
|
||
|
|
|
||
|
|
public void Append(object color, string text, int index, int length) {
|
||
|
|
if (frozen)
|
||
|
|
throw new InvalidOperationException("Instance is frozen");
|
||
|
|
if (text is null)
|
||
|
|
throw new ArgumentNullException(nameof(text));
|
||
|
|
if (index < 0)
|
||
|
|
throw new ArgumentOutOfRangeException(nameof(index));
|
||
|
|
if (length < 0)
|
||
|
|
throw new ArgumentOutOfRangeException(nameof(length));
|
||
|
|
if ((uint)(index + length) > (uint)text.Length)
|
||
|
|
throw new ArgumentOutOfRangeException(nameof(length));
|
||
|
|
|
||
|
|
if (length == 0)
|
||
|
|
return;
|
||
|
|
colorsList.Add(new SpanData<object>(new Span(currentOffset, length), color));
|
||
|
|
currentOffset += length;
|
||
|
|
}
|
||
|
|
|
||
|
|
public int GetStartIndex(int position) {
|
||
|
|
var list = colorsList;
|
||
|
|
int lo = 0, hi = list.Count - 1;
|
||
|
|
while (lo <= hi) {
|
||
|
|
int index = (lo + hi) / 2;
|
||
|
|
|
||
|
|
var spanData = list[index];
|
||
|
|
if (position < spanData.Span.Start)
|
||
|
|
hi = index - 1;
|
||
|
|
else if (position >= spanData.Span.End)
|
||
|
|
lo = index + 1;
|
||
|
|
else {
|
||
|
|
if (index > 0 && list[index - 1].Span.End == position)
|
||
|
|
return index - 1;
|
||
|
|
return index;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if ((uint)hi < (uint)list.Count && list[hi].Span.End == position)
|
||
|
|
return hi;
|
||
|
|
return lo < list.Count ? lo : -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|