inabox/InABox.DynamicGrid/Editors/RichTextEditor.xaml.cs

using System.Diagnostics;
using System.IO;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Media;
using InABox.WPF;
using Syncfusion.Windows.Controls.RichTextBoxAdv;

namespace InABox.DynamicGrid
{
    public delegate void RichTextEditorChanged(object sender);

    /// <summary>
    ///     Interaction logic for RichTextEditorControl.xaml
    /// </summary>
    public partial class RichTextEditor : UserControl
    {
        public static readonly DependencyProperty HideToolbarProperty =
            DependencyProperty.Register(nameof(HideToolbar), typeof(bool), typeof(RichTextEditor));

        public static readonly DependencyProperty ZoomFactorProperty =
            DependencyProperty.Register(nameof(ZoomFactor), typeof(double), typeof(RichTextEditor));

        public static readonly DependencyProperty ColorProperty =
            DependencyProperty.Register(
                "Color",
                typeof(Color),
                typeof(RichTextEditor),
                new PropertyMetadata(default(Color), OnBackgroundPropertyChanged));

        private bool bdirty;
        private bool bLoaded;
        private bool bReady;
        private string curvalue = "";


        public RichTextEditor()
        {
            InitializeComponent();

            DataContext = new RichTextEditorViewModel();

            Bold.SmallIcon = Properties.Resources.Bold16.AsBitmapImage(16, 16);
            Italic.SmallIcon = Properties.Resources.Italic16.AsBitmapImage(16, 16);
            Underline.SmallIcon = Properties.Resources.Underline16.AsBitmapImage(16, 16);
            AlignLeft.SmallIcon = Properties.Resources.AlignTextLeft16.AsBitmapImage(16, 16);
            AlignCentre.SmallIcon = Properties.Resources.AlignTextCenter16.AsBitmapImage(16, 16);
            AlignRight.SmallIcon = Properties.Resources.AlignTextRight16.AsBitmapImage(16, 16);
            AlignJustify.SmallIcon = Properties.Resources.AlignTextJustify16.AsBitmapImage(16, 16);
            Hyperlink.SmallIcon = Properties.Resources.Hyperlink16.AsBitmapImage(16, 16);
            Picture.SmallIcon = Properties.Resources.Picture16.AsBitmapImage(16, 16);
            Table.SmallIcon = Properties.Resources.Table16.AsBitmapImage(16, 16);
            ZoomIn.SmallIcon = Properties.Resources.zoomin.AsBitmapImage(16, 16);
            ZoomOut.SmallIcon = Properties.Resources.zoomout.AsBitmapImage(16, 16);
            Editor.CaretBrush = new SolidColorBrush(Colors.Black);
            Editor.FontFamily = new FontFamily("Calibri");
            Editor.FontSize = 12.0F;
            Editor.Foreground = new SolidColorBrush(Colors.Black);
            ZoomFactor = 150;
            Text = "";
        }

        public bool HideToolbar
        {
            get => (bool)GetValue(HideToolbarProperty);
            set
            {
                SetValue(HideToolbarProperty, value);
                Toolbar.Visibility = value ? Visibility.Collapsed : Visibility.Visible;
            }
        }

        public double ZoomFactor
        {
            get => (double)GetValue(ZoomFactorProperty);
            set
            {
                SetValue(ZoomFactorProperty, value);
                Editor.ZoomFactor = value;
            }
        }

        public string Text
        {
            get => Save();
            set => Load(value);
        }

        public RichTextEditorChanged OnChanged { get; set; }

        public Color Color
        {
            get => (Color)GetValue(ColorProperty);
            set
            {
                SetValue(ColorProperty, value);
                Editor.Background = new SolidColorBrush(value);
            }
        }

        public void Load(string content)
        {
            if (content == null)
                content = "";

            content = content.Replace("background:#000000", "").Replace("background:NoColor;", "");
            var ms = new MemoryStream(Encoding.ASCII.GetBytes(content));
            Editor.Load(ms, FormatType.Html);
            VerticalAlignment = VerticalAlignment.Top;
            VerticalAlignment = VerticalAlignment.Stretch;

            curvalue = content;
            bdirty = false;
            bLoaded = true;
        }

        public string Save()
        {
            if (bdirty)
            {
                var ms = new MemoryStream();
                Editor.Save(ms, FormatType.Html);
                var reader = new StreamReader(ms);
                curvalue = Encoding.UTF8.GetString(ms.GetBuffer());
                curvalue = curvalue.Replace("background:#000000", "");

                bdirty = false;
            }

            return curvalue;
        }

        private void RichTextBoxAdv_ContentChanged(object obj, ContentChangedEventArgs args)
        {
            bdirty = true;
        }

        public void SetColor(Color color)
        {
            Editor.Background = new SolidColorBrush(color);
        }

        private static void OnBackgroundPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var source = d as RichTextEditor;
            source.SetColor((Color)e.NewValue);
        }


        private void RichTextBoxAdv_LostFocus(object sender, RoutedEventArgs e)
        {
            if (bReady)
                OnChanged?.Invoke(this);
            bReady = true;
        }

        private void ZoomIn_Click(object sender, RoutedEventArgs e)
        {
            Editor.ZoomFactor = Editor.ZoomFactor * 1.5F;
        }

        private void ZoomOut_Click(object sender, RoutedEventArgs e)
        {
            Editor.ZoomFactor = Editor.ZoomFactor / 1.5F;
        }

        private void Editor_RequestNavigate(object obj, RequestNavigateEventArgs args)
        {
            var processStartInfo = new ProcessStartInfo(args.Hyperlink.NavigationLink);
            processStartInfo.UseShellExecute = true;
            Process.Start(processStartInfo);
        }
    }
}