[feature] Add new feature to Find Dialog: "Count Matches"

libse/FindReplaceDialogHelper.cs

@@ -1,4 +1,5 @@
-using System.Text.RegularExpressions;
+using System;
+using System.Text.RegularExpressions;
 using System.Windows.Forms;
 using Nikse.SubtitleEdit.Core.Enums;
 
@@ -6,9 +7,11 @@ namespace Nikse.SubtitleEdit.Core
 {
     public class FindReplaceDialogHelper
     {
+        private const string StartChars = " >-\"”“['‘`´¶(♪¿¡.…—";
+        private const string EndChars = " -\"”“]'`´¶)♪.!?:…—\r\n";
         private readonly string _findText = string.Empty;
         private readonly string _replaceText = string.Empty;
-        private readonly Regex _regEx;
+        private Regex _regEx;
         private int _findTextLenght;
 
         public bool Success { get; set; }
@@ -227,5 +230,62 @@ namespace Nikse.SubtitleEdit.Core
             return false;
         }
 
+        public int FindCount(Subtitle subtitle, bool wholeWord)
+        {
+            var count = 0;
+            //  validate pattern if find type is regex
+            if (FindType == FindType.RegEx)
+            {
+                if (!Utilities.IsValidRegex(FindText))
+                {
+                    MessageBox.Show(Configuration.Settings.Language.General.RegularExpressionIsNotValid);
+                    return count;
+                }
+                _regEx = new Regex(_findText);
+            }
+
+            // count matches
+            foreach (var p in subtitle.Paragraphs)
+            {
+                if (p.Text.Length < FindText.Length)
+                    continue;
+
+                switch (FindType)
+                {
+                    case FindType.Normal:
+                        count += GetWordCount(p.Text, _findText, wholeWord, StringComparison.OrdinalIgnoreCase);
+                        break;
+                    case FindType.CaseSensitive:
+                        count += GetWordCount(p.Text, _findText, wholeWord, StringComparison.Ordinal);
+                        break;
+                    case FindType.RegEx:
+                        count += _regEx.Matches(p.Text).Count;
+                        break;
+                }
+            }
+            return count;
+        }
+
+        private int GetWordCount(string text, string pattern, bool matchWholeWord, StringComparison comparison)
+        {
+            var idx = text.IndexOf(pattern, comparison);
+            var count = 0;
+            while (idx >= 0)
+            {
+                if (matchWholeWord)
+                {
+                    var startOk = (idx == 0) || (StartChars.Contains(text[idx - 1]));
+                    var endOk = (idx + pattern.Length == text.Length) || (EndChars.Contains(text[idx + pattern.Length]));
+                    if (startOk && endOk)
+                        count++;
+                }
+                else
+                {
+                    count++;
+                }
+                idx = text.IndexOf(pattern, idx + pattern.Length, comparison);
+            }
+            return count;
+        }
     }
-}
+}

src/Forms/FindDialog.Designer.cs

@@ -35,6 +35,9 @@
             this.radioButtonCaseSensitive = new System.Windows.Forms.RadioButton();
             this.radioButtonRegEx = new System.Windows.Forms.RadioButton();
             this.comboBoxFind = new System.Windows.Forms.ComboBox();
+            this.buttonCount = new System.Windows.Forms.Button();
+            this.labelCount = new System.Windows.Forms.Label();
+            this.checkBoxWholeWord = new System.Windows.Forms.CheckBox();
             this.SuspendLayout();
             // 
             // textBoxFind
@@ -109,11 +112,43 @@
             this.comboBoxFind.TabIndex = 0;
             this.comboBoxFind.KeyDown += new System.Windows.Forms.KeyEventHandler(this.ComboBoxFind_KeyDown);
             // 
+            // buttonCount
+            // 
+            this.buttonCount.Location = new System.Drawing.Point(207, 63);
+            this.buttonCount.Name = "buttonCount";
+            this.buttonCount.Size = new System.Drawing.Size(75, 23);
+            this.buttonCount.TabIndex = 10;
+            this.buttonCount.Text = "Count";
+            this.buttonCount.UseVisualStyleBackColor = true;
+            this.buttonCount.Click += new System.EventHandler(this.buttonCount_Click);
+            // 
+            // labelCount
+            // 
+            this.labelCount.AutoSize = true;
+            this.labelCount.Location = new System.Drawing.Point(204, 113);
+            this.labelCount.Name = "labelCount";
+            this.labelCount.Size = new System.Drawing.Size(40, 13);
+            this.labelCount.TabIndex = 11;
+            this.labelCount.Text = "Count:";
+            // 
+            // checkBoxWholeWord
+            // 
+            this.checkBoxWholeWord.AutoSize = true;
+            this.checkBoxWholeWord.Location = new System.Drawing.Point(12, 40);
+            this.checkBoxWholeWord.Name = "checkBoxWholeWord";
+            this.checkBoxWholeWord.Size = new System.Drawing.Size(83, 17);
+            this.checkBoxWholeWord.TabIndex = 12;
+            this.checkBoxWholeWord.Text = "Whole word";
+            this.checkBoxWholeWord.UseVisualStyleBackColor = true;
+            // 
             // FindDialog
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
             this.ClientSize = new System.Drawing.Size(298, 135);
+            this.Controls.Add(this.checkBoxWholeWord);
+            this.Controls.Add(this.labelCount);
+            this.Controls.Add(this.buttonCount);
             this.Controls.Add(this.comboBoxFind);
             this.Controls.Add(this.radioButtonRegEx);
             this.Controls.Add(this.radioButtonCaseSensitive);
@@ -145,5 +180,8 @@
         private System.Windows.Forms.RadioButton radioButtonCaseSensitive;
         private System.Windows.Forms.RadioButton radioButtonRegEx;
         private System.Windows.Forms.ComboBox comboBoxFind;
+        private System.Windows.Forms.Button buttonCount;
+        private System.Windows.Forms.Label labelCount;
+        private System.Windows.Forms.CheckBox checkBoxWholeWord;
     }
 }

src/Forms/FindDialog.cs

@@ -10,8 +10,8 @@ namespace Nikse.SubtitleEdit.Forms
     public sealed partial class FindDialog : Form
     {
         private Regex _regEx;
-
-        public FindDialog()
+        private readonly Subtitle _subtitle;
+        public FindDialog(Subtitle subtitle)
         {
             InitializeComponent();
 
@@ -21,6 +21,8 @@ namespace Nikse.SubtitleEdit.Forms
             radioButtonCaseSensitive.Text = Configuration.Settings.Language.FindDialog.CaseSensitive;
             radioButtonRegEx.Text = Configuration.Settings.Language.FindDialog.RegularExpression;
             buttonCancel.Text = Configuration.Settings.Language.General.Cancel;
+            labelCount.Text = string.Empty;
+            _subtitle = subtitle;
 
             if (Width < radioButtonRegEx.Right + 5)
                 Width = radioButtonRegEx.Right + 5;
@@ -178,9 +180,19 @@ namespace Nikse.SubtitleEdit.Forms
             if (bitmap != null)
             {
                 IntPtr Hicon = bitmap.GetHicon();
-                this.Icon = Icon.FromHandle(Hicon);
+                Icon = Icon.FromHandle(Hicon);
             }
         }
 
+        private void buttonCount_Click(object sender, EventArgs e)
+        {
+            var count = 0;
+            if (FindText.Length > 0)
+            {
+                count = GetFindDialogHelper(0).FindCount(_subtitle, checkBoxWholeWord.Checked);
+            }
+            labelCount.ForeColor = count > 0 ? Color.Blue : Color.Red;
+            labelCount.Text = string.Format("Count: {0}", count);
+        }
     }
 }

src/Forms/Main.cs

@@ -3862,7 +3862,7 @@ namespace Nikse.SubtitleEdit.Forms
                 }
             }
 
-            using (var findDialog = new FindDialog())
+            using (var findDialog = new FindDialog(_subtitle))
             {
                 findDialog.SetIcon(toolStripButtonFind.Image as Bitmap);
                 findDialog.Initialize(selectedText, _findHelper);