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//
// TextViewMargin.SpanUpdateListener.cs
//
// Author:
// Mike Krüger <mikkrg@microsoft.com>
//
// Copyright (c) 2018 Microsoft Corporation. All rights reserved.
//
// 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 System.Linq;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using Mono.TextEditor.Highlighting;
using MonoDevelop.Components.AtkCocoaHelper;
using Gdk;
using Gtk;
using System.Timers;
using System.Diagnostics;
using MonoDevelop.Components;
using MonoDevelop.Core;
using MonoDevelop.Core.Text;
using MonoDevelop.Ide.Editor;
using MonoDevelop.Ide.Editor.Highlighting;
using System.Collections.Immutable;
using System.Threading;
using MonoDevelop.Ide;
using System.Threading.Tasks;
namespace Mono.TextEditor
{
partial class TextViewMargin
{
internal class SpanUpdateListener : IDisposable
{
readonly MonoTextEditor textEditor;
public bool HasUpdatedMultilineSpan { get; set; }
public SpanUpdateListener (MonoTextEditor textEditor)
{
this.textEditor = textEditor;
textEditor.Document.TextChanged += Document_TextChanged;
textEditor.Document.TextChanging += Document_TextChanging;
}
public void Dispose()
{
textEditor.Document.TextChanged -= Document_TextChanged;
textEditor.Document.TextChanging -= Document_TextChanging;
}
List<HighlightedLine> lines = new List<HighlightedLine> ();
void Document_TextChanging (object sender, TextChangeEventArgs e)
{
HasUpdatedMultilineSpan = false;
foreach (var change in e.TextChanges) {
var layout = textEditor.TextViewMargin.GetLayout (textEditor.GetLineByOffset (change.Offset));
lines.Add (layout.HighlightedLine);
}
}
void Document_TextChanged (object sender, TextChangeEventArgs e)
{
int i = 0;
foreach (var change in e.TextChanges) {
if (i >= lines.Count)
break; // should never happen
var oldHighlightedLine = lines [i++];
var curLine = textEditor.GetLineByOffset (change.Offset);
var curLayout = textEditor.TextViewMargin.GetLayout (curLine);
if (!UpdateLineHighlight (curLine.LineNumber, oldHighlightedLine, curLayout.HighlightedLine))
break;
}
lines.Clear ();
}
bool UpdateLineHighlight (int lineNumber, HighlightedLine oldLine, HighlightedLine newLine)
{
if (oldLine != null && ShouldUpdateSpan (oldLine, newLine)) {
textEditor.TextViewMargin.PurgeLayoutCacheAfter (lineNumber);
textEditor.QueueDraw ();
HasUpdatedMultilineSpan = true;
return false;
}
return true;
}
static bool ShouldUpdateSpan (HighlightedLine line1, HighlightedLine line2)
{
if (line1.IsContinuedBeyondLineEnd != line2.IsContinuedBeyondLineEnd)
return true;
if (line1.IsContinuedBeyondLineEnd == true) {
return line1.Segments.Last ().ScopeStack.Peek () != line2.Segments.Last ().ScopeStack.Peek ();
}
return false;
}
}
}
}
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