/*
* Formats the keyword textbox to create a list of each of the keywords it needs to seach for,
* then finds out how often it appears in the text and adds it to the KeywordFrequencies list.
*/
private void GetKeywordsFromTextbox()
{
List <String> Keywords = new List <String>();
String[] KeywordsSplitted = Textbox_Keywords.getTextbox().Text.Split(',');
KeywordFrequencies.Clear();
foreach (String keyword in KeywordsSplitted)
{
if (keyword.Trim() != String.Empty)
{
String FormattedKeyword = keyword.ToLower().Trim();
int Frequency = GetNumberOfKeywords(FormattedKeyword);
if (RichTextbox_MainText.getTextbox().Text.ToLower().Contains(FormattedKeyword))
{
KeywordFrequency NewKF;
NewKF.Keyword = keyword.Trim();
NewKF.Frequency = Frequency;
KeywordFrequencies.Add(NewKF);
}
ChangeColourOfKeywords(FormattedKeyword);
}
}
AddKeywordsToListbox();
}
public MainForm()
{
InitializeComponent();
// Event whenever the text is changed, to know when the email has been edited by the user
RichTextbox_MainText.getTextbox().TextChanged += new EventHandler(MainForm_RichTextbox_TextChanged);
Listbox_SearchCount.getListBox().SelectedIndexChanged += new EventHandler(MainForm_SelectedIndexChanged);
}
/*
* Removes the red font on the keywords and clears the listbox of items.
* Sets the previous email text to the current email text.
*/
private void MainForm_RichTextbox_TextChanged(object sender, EventArgs e)
{
if (RichTextbox_MainText.getTextbox().Text != PrevMainText)
{
Listbox_SearchCount.getListBox().Items.Clear();
SetMainTextDefaultColour();
PrevMainText = RichTextbox_MainText.getTextbox().Text;
}
}
/*
* Removes all underlines in the textbox.
*/
private void RemoveMainTextUnderline()
{
int CaretPosition = RichTextbox_MainText.getTextbox().SelectionStart;
RichTextbox_MainText.getTextbox().SelectAll();
RichTextbox_MainText.getTextbox().SelectionFont = RichTextbox_MainText.getTextbox().Font;
RichTextbox_MainText.getTextbox().SelectionStart = CaretPosition;
RichTextbox_MainText.getTextbox().SelectionLength = 0;
}
/*
* Sets all of the email text to a black font to remove any red font.
*/
private void SetMainTextDefaultColour()
{
int CaretPosition = RichTextbox_MainText.getTextbox().SelectionStart;
RichTextbox_MainText.getTextbox().SelectAll();
RichTextbox_MainText.getTextbox().SelectionColor = Color.Black;
RichTextbox_MainText.getTextbox().SelectionFont = RichTextbox_MainText.getTextbox().Font;
RichTextbox_MainText.getTextbox().SelectionStart = CaretPosition;
RichTextbox_MainText.getTextbox().SelectionLength = 0;
}
/*
* Changes the colour of the keywords found in the email text.
*/
private void ChangeColourOfKeywords(String Keyword)
{
Regex regex = new Regex(Keyword);
int CaretPosition = RichTextbox_MainText.getTextbox().SelectionStart;
foreach (Match match in regex.Matches(RichTextbox_MainText.getTextbox().Text.ToLower()))
{
RichTextbox_MainText.getTextbox().Select(match.Index, match.Length);
RichTextbox_MainText.getTextbox().SelectionColor = Color.Red;
}
RichTextbox_MainText.getTextbox().SelectionStart = CaretPosition;
RichTextbox_MainText.getTextbox().SelectionLength = 0;
}
/*
* Removes any previous underline in the textbox, then underlines the keywords found in the textbox.
*/
private void UnderlineSelectedKeyword(String Keyword)
{
RemoveMainTextUnderline();
Regex regex = new Regex(Keyword);
int CaretPosition = RichTextbox_MainText.getTextbox().SelectionStart;
Font textboxFont = RichTextbox_MainText.getTextbox().Font;
foreach (Match match in regex.Matches(RichTextbox_MainText.getTextbox().Text.ToLower()))
{
RichTextbox_MainText.getTextbox().Select(match.Index, match.Length);
RichTextbox_MainText.getTextbox().SelectionFont = new Font(textboxFont.FontFamily, textboxFont.Size, FontStyle.Underline);;
}
RichTextbox_MainText.getTextbox().SelectionStart = CaretPosition;
RichTextbox_MainText.getTextbox().SelectionLength = 0;
}
/*
* Clears the text in the email textbox.
*/
private void Button_ClearMainText_Click(object sender, EventArgs e)
{
RichTextbox_MainText.getTextbox().Text = String.Empty;
Listbox_SearchCount.getListBox().Items.Clear();
}
/*
* Returns the number of times a keyword appears in the email text by splitting the string at the points
* where it will have the keyword. This gives the number of times the keyword appears + 1.
*/
private int GetNumberOfKeywords(String Keyword)
{
String[] MainTextSplitted = RichTextbox_MainText.getTextbox().Text.ToLower().Trim().Split(new String[] { Keyword }, StringSplitOptions.None);
return(MainTextSplitted.Length - 1);
}
