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ay wpf avalonedit【1/3】

时间：2022年02月09日 | 作者 : aaronyang | 分类 : WPF | 浏览: 951次 | 评论 0 人

【支持NET6】

github地址：GitHub - icsharpcode/AvalonEdit: The WPF-based text editor component used in SharpDevelop

官方文档:AvalonEdit - Table of Content

它有个很好的项目GitHub - icsharpcode/WpfDesigner: The WPF Designer from SharpDevelop

GitHub - WPFDevelopersOrg/XamlViewer: XAML Viewer is a lightweight XAML editor.

新建wpf .net framework4.5的项目，nuget搜avalonedit

当前版本6.1.3.50

准备工作

<Window x:Class="avaedit.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:avaedit"
        mc:Ignorable="d" WindowStartupLocation="CenterScreen"
        xmlns:avalonEdit="http://icsharpcode.net/sharpdevelop/avalonedit"
        Title="" Height="700" Width="1200">
    <Grid>
        
    </Grid>
</Window>

入门

<Window x:Class="avaedit.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:avaedit"
        mc:Ignorable="d" WindowStartupLocation="CenterScreen"
        xmlns:avalonEdit="http://icsharpcode.net/sharpdevelop/avalonedit"
        Title="" Height="700" Width="1200">
    <Grid>
        <avalonEdit:TextEditor x:Name="textEditor" SyntaxHighlighting="C#"/>
    </Grid>
</Window>

运行后，粘贴一段C#代码

看了下代码，原生自己写的

显示行号

折叠功能

这里以xml文件做demo，内置了xml的高亮规则和折叠

<?xml version="1.0"?>
<SyntaxDefinition name="Custom Highlighting" xmlns="http://icsharpcode.net/sharpdevelop/syntaxdefinition/2008">
	<Color name="Comment" foreground="Green" />
	<Color name="String" foreground="Blue" />
	
	<!-- This is the main ruleset. -->
	<RuleSet>
		<Span color="Comment" begin="//" />
		<Span color="Comment" multiline="true" begin="/\*" end="\*/" />
		
		<Span color="String">
			<Begin>"</Begin>
			<End>"</End>
			<RuleSet>
				<!-- nested span for escape sequences -->
				<Span begin="\\" end="." />
			</RuleSet>
		</Span>
		
		<Keywords fontWeight="bold" foreground="Blue">
			<Word>if</Word>
			<Word>else</Word>
			<!-- ... -->
		</Keywords>
		
		<Keywords fontWeight="bold" fontStyle="italic" foreground="Red">
			<Word>AvalonEdit</Word>
		</Keywords>
		
		<!-- Digits -->
		<Rule foreground="DarkBlue">
            \b0[xX][0-9a-fA-F]+  # hex number
        |    \b
            (    \d+(\.[0-9]+)?   #number with optional floating point
            |    \.[0-9]+         #or just starting with floating point
            )
            ([eE][+-]?[0-9]+)? # optional exponent
        </Rule>
	</RuleSet>
</SyntaxDefinition>

后台单击折叠按钮

  private static FoldingManager foldingManager = null;
        private static XmlFoldingStrategy foldingStrategy = new XmlFoldingStrategy();

   

        private void zhedie_Click(object sender, RoutedEventArgs e)
        { 
            //默认语法高亮规则
            textEditor.SyntaxHighlighting = HighlightingManager.Instance.GetDefinitionByExtension(".xml");
            //折叠
            foldingManager = FoldingManager.Install(textEditor.TextArea);

            //textEditor.Text = "";
            foldingStrategy.UpdateFoldings(foldingManager, textEditor.Document);
        }

运行后，粘贴一段xml

单击折叠后

折叠后，复制文本都是可以的

行号的显示颜色 LineNumbersForeground

引入xmlns:system="clr-namespace:System;assembly=mscorlib"，xaml上设置数字

   <avalonEdit:TextEditor LineNumbersForeground="Red" Grid.Row="1" x:Name="textEditor" SyntaxHighlighting="C#" ShowLineNumbers="True">
            <avalonEdit:TextEditor.Options>
                <avalonEdit:TextEditorOptions ShowSpaces="True" >
                </avalonEdit:TextEditorOptions>
            </avalonEdit:TextEditor.Options>
        </avalonEdit:TextEditor>

通过Options指定设置，F12可以看到很多设置，比如ShowSpaces="True"，显示虚线

删掉了一些xml节点，折叠节点不是实时更新折叠的，修改折叠按钮后面的代码

  private void zhedie_Click(object sender, RoutedEventArgs e)
        {
            //默认语法高亮规则
            textEditor.SyntaxHighlighting = HighlightingManager.Instance.GetDefinitionByExtension(".xml");
            //折叠
            if (foldingManager != null)
            {
                FoldingManager.Uninstall(foldingManager);
                foldingManager.Clear();
            }
            foldingManager = FoldingManager.Install(textEditor.TextArea);

            //textEditor.Text = "";
            foldingStrategy.UpdateFoldings(foldingManager, textEditor.Document);
        }

下面几个设置没看到效果

                <avalonEdit:TextEditorOptions ShowSpaces="True" WordWrapIndentation="14" InheritWordWrapIndentation="true">
                    <avalonEdit:TextEditorOptions.ColumnRulerPosition>
                        <system:Int32>10</system:Int32>
                    </avalonEdit:TextEditorOptions.ColumnRulerPosition>
                </avalonEdit:TextEditorOptions>

输入点号，自动补全

需要先自己继承 ICompletionData 接口创建提示数据

public class CompletionData : ICompletionData
    {
        public CompletionData(string text)
        {
            Text = text;
        }

        public ImageSource Image => null;

        public string Text { get; }

        public object Content => Text;

        public object Description =>this.Text +" 的描述";

        public double Priority { get; }

        public void Complete(TextArea textArea, ISegment completionSegment,
            EventArgs insertionRequestEventArgs)
        {
            textArea.Document.Replace(completionSegment, Text);
        }
    }

输入点号，主要CompletionWindow这个窗体show就可以了，主要是自己要判断什么时候弹，弹什么提示

        private CompletionWindow _completionWindow;

        private void TextAreaOnTextEntered(object sender, TextCompositionEventArgs e)
        {
            if (e.Text == ".")
            {
                _completionWindow = new CompletionWindow(textEditor.TextArea);

                var completionData = _completionWindow.CompletionList.CompletionData;
                completionData.Add(new CompletionData("Name"));
                completionData.Add(new CompletionData("Gender"));
                completionData.Add(new CompletionData("Class"));
                _completionWindow.Show();

                _completionWindow.Closed += (o, args) => _completionWindow = null;
            }
        }

输入.