Visual Studio SDK-如何在调用的命令上添加边距标志符号? [英] Visual Studio SDK - How to add a margin glyph on command invoked?

问题描述

如何修改此示例: https://msdn.microsoft.com/en-us/library/ee361745.aspx 以便在单击添加按钮时将标志符号添加到页边空白?

How can I modify this sample: https://msdn.microsoft.com/en-us/library/ee361745.aspx to have glyphs added to the margin when a button I added is clicked?

我有一个创建特殊断点的按钮.我希望我自己的页边标志符号能够识别这种类型.因此，我在Tagger类中编写了GetTags方法，如下所示:

I have a button which creates a special kind of breakpoint. I would like this kind to be recognized by my own margin glyph. So I wrote the GetTags method in my Tagger class as follows:

    IEnumerable<ITagSpan<MyBreakpointTag>> ITagger<MyBreakpointTag>.GetTags(NormalizedSnapshotSpanCollection spans)
    {
        if (BreakpointManager != null)
        {
            DTE2 ide = ServiceProvider.GlobalProvider.GetService(typeof(DTE)) as DTE2;
            Document document = ide.ActiveDocument;

            foreach (SnapshotSpan span in spans)
            {
                ITextSnapshot textSnapshot = span.Snapshot;
                foreach (ITextSnapshotLine textSnapshotLine in textSnapshot.Lines)
                {
                    if (BreakpointManager.IsMyBreakpointAt(document.FullName, textSnapshotLine.LineNumber + 1))
                    {
                        yield return new TagSpan<MyBreakpointTag>(new SnapshotSpan(textSnapshotLine.Start, 1),
                                new MyBreakpointTag());
                    }
                }
            }
        }
    }

但是，在将光标移动到另一行代码或更改代码后，会添加字形.单击按钮后立即添加字形，我该怎么办?

However, glyphs are added after moving the cursor to a different line of code or making changes to the code. What do I have to do to have glyphs added right after the button is clicked?

推荐答案

只要出现布局，编辑器就会调用GetTags，但是由于任何随机原因，编辑器都不会调用它. (想想:它将如何知道何时打电话给您?)您需要从标记器中引发TagsChanged事件，以说给定跨度的标记已更改，然后它将再次调用GetTags进行刷新.

GetTags is called by the editor whenever a layout happens, but the editor won't call it for any random reason. (Think: how would it know when to call you?) You need to raise the TagsChanged event from your tagger to say the tags for a given span changed, and then it'll call GetTags again to refresh.

作为不相关的建议:出于以下几个原因，您不应该在GetTag中使用DTE.ActiveDocument:

As an unrelated piece of advice: you shouldn't be using DTE.ActiveDocument in your GetTags for a few reasons:

1. GetTags应该尽可能快...调用DTE方法很少很快.
2. 想象一下您有两个打开的文件，并且为非活动文件调用了GetTags.这将使两个文件都使用相同的文件名，这可能是不好的.有代码

1. GetTags should be as fast as possible...calling DTE methods are rarely fast.
2. Imagine you have two files open, and GetTags is called for the non-active file. That would have both files looking at the same filename which is probably bad. There's code here that shows how to fetch the file name from an ITextBuffer.

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