private void UpdatePreTag(PreTag preTag)
{
if (preTag == null)
{
return;
}
int position = contentTextBox.SelectionStart;
if (preTag.ComesFromFile)
{
if (!contentTextBox.Text.EndsWith("\r\n\r\n"))
{
contentTextBox.Text += "\r\n\r\n";
}
contentTextBox.Text += preTag.Text;
}
else
{
contentTextBox.Text = contentTextBox.Text.Substring(0, preTag.Start) +
preTag.Text +
contentTextBox.Text.Substring(preTag.Start + preTag.Length);
}
contentTextBox.SelectionStart = position;
}
private async void ReadFileAndAddTextBox(StorageFile file)
{
string fileContent = await FileIO.ReadTextAsync(file);
PreTag preTag = new PreTag();
preTag.ComesFromFile = true;
preTag.Text = fileContent;
Frame.Navigate(typeof(PreEditorPage), preTag);
}
/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached. The Parameter
/// property is typically used to configure the page.</param>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
preTag = e.Parameter as PreTag;
if (preTag.ComesFromFile)
{
contentTextBox.Text = preTag.Text.Trim();
}
else
{
contentTextBox.Text = ContentBuilder.PreToText(preTag.Text);
}
}
/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached. The Parameter
/// property is typically used to configure the page.</param>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
preTag = e.Parameter as PreTag;
if (preTag.ComesFromFile)
{
contentTextBox.Text = preTag.Text.Trim();
}
else
{
contentTextBox.Text = ContentBuilder.PreToText(preTag.Text);
}
}
private async void TextBox_ContextMenuOpening(object sender, ContextMenuEventArgs e)
{
TextBox textBox = (TextBox)sender;
PreTag preTag = ContentBuilder.GetPreTag(textBox);
if (preTag != null)
{
e.Handled = true;
// Create a menu and add commands specifying an id value for each instead of a delegate.
var menu = new PopupMenu();
menu.Commands.Add(new UICommand("Edit <pre> tag.", null, 2));
var chosenCommand = await menu.ShowAsync(new Point(e.CursorLeft, e.CursorTop));
if (chosenCommand != null)
{
if (chosenCommand.Label.StartsWith("Edit"))
{
Frame.Navigate(typeof(PreEditorPage), preTag);
}
}
}
}
static public PreTag GetPreTag(TextBox textBox)
{
PreTag preTag = new PreTag();
preTag.ComesFromFile = false;
Debug.WriteLine(textBox.SelectionStart);
int lineFeeds = CountLineFeedsBeforeSelection(textBox.Text, textBox.SelectionStart);
if (textBox.SelectedText.Length > 0)
{
preTag.Start = textBox.Text.IndexOf("<pre>", textBox.SelectionStart + lineFeeds);
}
// If TextBox.SelectedText is zero, the current cursor position is textBox.SelectionStart.
if (preTag.Start < 0)
{
preTag.Start = textBox.Text.LastIndexOf("<pre>", textBox.SelectionStart + lineFeeds);
}
if (preTag.Start >= 0)
{
// If the is a <pre>, look for the next </pre>.
preTag.End = textBox.Text.IndexOf("</pre>", preTag.Start);
}
if (preTag.Start < 0 || preTag.End < 0)
{
// <pre> or </pre> not found.
return(null);
}
preTag.Text = textBox.Text.Substring(preTag.Start, preTag.Length);
return(preTag);
}
public static PreTag GetPreTag(TextBox textBox)
{
PreTag preTag = new PreTag();
preTag.ComesFromFile = false;
Debug.WriteLine(textBox.SelectionStart);
int lineFeeds = CountLineFeedsBeforeSelection(textBox.Text, textBox.SelectionStart);
if (textBox.SelectedText.Length > 0)
{
preTag.Start = textBox.Text.IndexOf("<pre>", textBox.SelectionStart + lineFeeds);
}
// If TextBox.SelectedText is zero, the current cursor position is textBox.SelectionStart.
if (preTag.Start < 0)
{
preTag.Start = textBox.Text.LastIndexOf("<pre>", textBox.SelectionStart + lineFeeds);
}
if (preTag.Start >= 0)
{
// If the is a <pre>, look for the next </pre>.
preTag.End = textBox.Text.IndexOf("</pre>", preTag.Start);
}
if (preTag.Start < 0 || preTag.End < 0)
{
// <pre> or </pre> not found.
return null;
}
preTag.Text = textBox.Text.Substring(preTag.Start, preTag.Length);
return preTag;
}