Question

我正在为我自己的编程语言创建一个文本编辑器。它运作得很好，但我有一个问题;当我输入这样的东西时：

void Example() {
   for (int i = 0, 10; i++) {
    console.println(i);
   }
}

for-loop的右括号

for (int i = 0, 10; i++) {
    console.println(i);
} <== This one

未突出显示。谁能帮我？提前谢谢！

这是我的代码：

Imports System.Drawing.Color
Imports System.Drawing.Font

Public Class Form1

Private Sub Highlight(ByRef Text As String(), ByRef Name As String)
    Dim Color As Color = Nothing
    Dim Font As Font = Nothing
    Select Case Name
        Case "Keywords"
            Color = Blue
            Font = NewFont(FontStyle.Regular)
        Case "Functions"
            Color = Black
            Font = NewFont(FontStyle.Italic)
        Case "Classes"
            Color = Cyan
            Font = NewFont(FontStyle.Regular)
        Case "Types"
            Color = Purple
            Font = NewFont(FontStyle.Regular)
        Case "Operators"
            Color = GreenYellow
            Font = NewFont(FontStyle.Regular)
        Case "Brackets"
            Color = Red
            Font = NewFont(FontStyle.Regular)
    End Select
    Dim CursorPos As Integer = tb.SelectionStart
    For i As Integer = 0 To Text.Length - 1
        FindAll(tb, Text(i))
        tb.SelectionColor = Color
        tb.SelectionFont = Font
        tb.DeselectAll()
    Next
    tb.SelectionStart = CursorPos
    tb.SelectionColor = Nothing
    tb.SelectionFont = NewFont(FontStyle.Regular)
End Sub

Private Function NewFont(ByVal Style As FontStyle)
    Return New Font(tb.Font, Style)
End Function

Private Sub FindAll(ByRef tb As RichTextBox, ByRef Find As String)
    Dim StartIndex As Integer = 0
    Dim Text As String = tb.Text
    Do
        Dim Index As Integer = Text.IndexOf(Find, StartIndex)
        If Index < 0 Then
            Exit Do
        End If
        tb.Select(Index, Find.Length)
        StartIndex = Index + 1
    Loop
End Sub

Private Sub RichTextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tb.TextChanged
    Dim Keywords As String() = {"new", "using", "void", "function", "public", "protected", "private", "if", "else", "for", "loop", "while", "until", "true", "false", "null", "default"}
    Dim Types As String() = {"string", "int", "long", "byte", "char"}
    Dim Brackets As String() = {"(", ")", "[", "]", "{", "}"}
    Dim Operators As String() = {"+", "-", "=", "/", "*"}
    Dim Classes As String() = {"console", "color", "font"}
    Dim Functions As String() = {"print", "println"}
    Highlight(Keywords, "Keywords")
    Highlight(Types, "Types")
    Highlight(Brackets, "Brackets")
    Highlight(Operators, "Operators")
    Highlight(Classes, "Classes")
    Highlight(Functions, "Functions")
End Sub
End Class

Answer 1

您的代码只是高举每个括号，运算符等的最后一次出现......

通过在每次成功查找后应用字体和颜色将正确影响文本。

BTW-您的代码没有取消关键字（例如 void 更改为 vo id 保持hilited）

结果 tadaa

修改 FindAll（）程序

    Private Sub FindAll(ByRef tb As RichTextBox, ByRef Find As String, ByRef StartIndex As Integer)

    Dim Text As String = tb.Text

    Dim Index As Integer = Text.IndexOf(Find, StartIndex)
    StartIndex = Index + 1
    If Index < 0 Then
        Exit Sub
    End If
    tb.Select(Index, Find.Length)
End Sub

以及突出显示过程结束时的 For循环

        Dim CursorPos As Integer = tb.SelectionStart

    For i As Integer = 0 To Text.Length - 1
        Dim StartIndex As Integer = 0
        Do
            FindAll(tb, Text(i), StartIndex)

            If StartIndex = 0 Then
                Exit Do
            End If

            tb.SelectionColor = Color
            tb.SelectionFont = Font
            tb.DeselectAll()
        Loop
        tb.SelectionStart = CursorPos
        tb.SelectionColor = Nothing
        tb.SelectionFont = NewFont(FontStyle.Regular)
    Next

突出显示的括号无法正常工作 - VB.NET

1 个答案: