mainform.cs

本软件是针对PL/x语法结构设计的PL/x编译器

using System;
using System.IO;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using PLX;


namespace PLX
{
    public partial class Form1 : Form
    {
        private string strDefaultFileName;
        private static SourceCodeChildForm scChildForm;
        private static OutPutChildForm OPChildForm;
        private static MIDCode midCodeForm;
        private static PLXAnalyzer plxAnalyzer;
        public int lineNum;
       
         public Form1()
        {
            InitializeComponent();
            ShowOPChildForm();
            ShowMIDCodeChildForm();
            ShowSCChildForm();
        }

        //Open File
        private void OpenFileOToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (ofgOpenFile.ShowDialog() == DialogResult.OK)
            {
                //clear three windows' older information
                OPChildForm.Controls[0].Text = "";
                midCodeForm.Controls[0].Text = "";
                scChildForm.Controls["rtxtLineNum"].Text = "1\n";
                
                strDefaultFileName = ofgOpenFile.FileName;
                StreamReader sr = new StreamReader(strDefaultFileName,Encoding.GetEncoding("GB2312"));
                ShowSCTextAndLineNum(ref sr);
                //decide scan menu is enabled or disabled according to textbox's content
                CanScan();
            }
  
        }

        //Save File
        private void SaveFileSToolStripMenuItem_Click(object sender, EventArgs e)
        {
            sfgSaveFile.FileName = strDefaultFileName;
            if (sfgSaveFile.ShowDialog() == DialogResult.OK)
            {
                (scChildForm.Controls["rtxtSourceCode"] as RichTextBox).SaveFile(sfgSaveFile.FileName, RichTextBoxStreamType.PlainText);
            }
        }

        private void ExitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void SourceCodeToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ShowSCChildForm();
        }

        private void OutPutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ShowOPChildForm();
        }

        private void MIDCodeToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ShowMIDCodeChildForm();
        }

        //Show SourceCode Window
        private void ShowSCChildForm()
        {
            if (scChildForm == null || scChildForm.IsDisposed)
            {
                scChildForm = new SourceCodeChildForm();
                scChildForm.MdiParent = this;
                scChildForm.Show();
            }
        }

        //Show OutPut Window
        private void ShowOPChildForm()
        {
            if (OPChildForm == null || OPChildForm.IsDisposed)
            {
                OPChildForm = new OutPutChildForm();
                OPChildForm.MdiParent = this;
                OPChildForm.Show();
            }
        }

        //Show MIDCode Window
        private void ShowMIDCodeChildForm()
        {
            if (midCodeForm == null || midCodeForm.IsDisposed)
            {
                midCodeForm = new MIDCode();
                midCodeForm.MdiParent = this;
                midCodeForm.Show();
            }
        }

        private void ShowSCTextAndLineNum(ref StreamReader sr)
        {
            StringBuilder strbTempText = new StringBuilder(500);
            //read line by line and record lineNo
            string strLineTemp;

            lineNum = 0;
            while ((strLineTemp = sr.ReadLine()) != null)
            {
                strbTempText.AppendLine(strLineTemp);
                lineNum++;
            }
            sr.Close();
    
            scChildForm.Controls["rtxtSourceCode"].Text = strbTempText.ToString();
            BuildLineNum(1,lineNum);
            
        }

        private void ScanToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (scChildForm.Controls["rtxtSourceCode"].Text.Trim().Length != 0)
            {
                plxAnalyzer = new PLXAnalyzer();
                plxAnalyzer.StrSourceCode = scChildForm.Controls["rtxtSourceCode"].Text;
                PLXAnalyzer.lineNum = 1;
                plxAnalyzer.LL = plxAnalyzer.StrSourceCode.Length;

                plxAnalyzer.GetSym();
                plxAnalyzer.Prog(0);

                if (plxAnalyzer.StrErrorOut == null)
                {
                    OPChildForm.Controls[0].Text = "生成成功!\n";
                    midCodeForm.Controls[0].Text = plxAnalyzer.ListMidCode();
                    InterpretToolStripMenuItem.Enabled = true;
                }
                else
                {
                    OPChildForm.Controls[0].Text = plxAnalyzer.StrErrorOut;
                    InterpretToolStripMenuItem.Enabled = false;
                }
            }
       }

        private void InterpretToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (scChildForm.Controls["rtxtSourceCode"].Text.Trim().Length != 0  && plxAnalyzer.code.Length != 0)
            {
                PLXInterpret plxinterpret = new PLXInterpret();
                plxinterpret.interpret(plxAnalyzer);
                OPChildForm.Controls[0].Text = plxinterpret.StrOutPut;
            }
        }

        public  void CanScan()
        {
            if (scChildForm.Controls["rtxtSourceCode"].Text.Trim().Length == 0)
                ScanToolStripMenuItem.Enabled = false;
            else
                ScanToolStripMenuItem.Enabled = true;
            InterpretToolStripMenuItem.Enabled = false;
        }

        public static void BuildLineNum(int firstLineNum,int lastLineNum)
        {
            if (lastLineNum > 0)
            {
                StringBuilder strbLine = new StringBuilder(500);
                for (int i = firstLineNum; i <= lastLineNum; i++)
                {
                    strbLine.Append(i.ToString() + "\n");
                }
                scChildForm.Controls["rtxtLineNum"].Text = strbLine.ToString();
            }
            else
                scChildForm.Controls["rtxtLineNum"].Text = "1\n";
        }




    }
}