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ThilagarajSF5012ThilagarajSF5012
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‎AI Demos/SmartRedaction/SmartRedaction/MainPage.xaml.cs‎

Lines changed: 67 additions & 120 deletions
Original file line numberDiff line numberDiff line change
@@ -6,6 +6,7 @@
66
using Syncfusion.Pdf.Interactive;
77
using Syncfusion.Pdf.Redaction;
88
using Syncfusion.Maui.PdfViewer;
9+
using System.Collections.Specialized;
910
using System.Collections.ObjectModel;
1011

1112
namespace SmartRedaction
@@ -25,21 +26,26 @@ public MainPage()
2526
sensitiveInfoView.NodeChecked += SensitiveInfoView_NodeChecked;
2627
sensitiveInfoViewMobile.NodeChecked += SensitiveInfoView_NodeChecked;
2728
MarkRedaction.StateChanged += MarkRedaction_StateChanged;
28-
PdfViewer.AnnotationAdded += PdfViewer_AnnotationAdded;
2929
AddRedact.PropertyChanged += AddRedact_PropertyChanged;
3030
PdfViewer.DocumentLoaded += PdfViewer_DocumentLoaded;
31+
var redactionMarks = PdfViewer.RedactionMarks as INotifyCollectionChanged;
32+
if (redactionMarks!=null)
33+
redactionMarks.CollectionChanged += OnRedactionMarksChanged;
34+
}
35+
36+
private void OnRedactionMarksChanged(object? sender, NotifyCollectionChangedEventArgs e)
37+
{
38+
var hasItems = PdfViewer.RedactionMarks != null && PdfViewer.RedactionMarks.Count > 0 && MarkRedaction?.IsChecked == true;
39+
if (hasItems == true)
40+
AddRedact.IsEnabled = hasItems;
3141
}
3242

3343
private void MarkRedaction_StateChanged(object? sender, Syncfusion.Maui.Buttons.StateChangedEventArgs e)
3444
{
3545
if (e.IsChecked.HasValue && e.IsChecked.Value)
36-
{
37-
PdfViewer.AnnotationMode = AnnotationMode.Square;
38-
PdfViewer.AnnotationSettings.Square.BorderWidth = 1;
39-
PdfViewer.AnnotationSettings.Author = "RedactedRect";
40-
}
46+
PdfViewer.RedactionMode = RedactionMode.Rect;
4147
else
42-
PdfViewer.AnnotationMode = AnnotationMode.None;
48+
PdfViewer.RedactionMode = RedactionMode.None;
4349
}
4450

4551
private void PdfViewer_DocumentLoaded(object? sender, EventArgs? e)
@@ -55,6 +61,8 @@ private void PdfViewer_DocumentLoaded(object? sender, EventArgs? e)
5561
MobileScan.IsEnabled = true;
5662
DesktopScanButton.IsEnabled = true;
5763
}
64+
ViewModel.ChildNodes.Clear();
65+
ViewModel.SensitiveInfo.Clear();
5866
}
5967

6068
private void AddRedact_PropertyChanged(object? sender, System.ComponentModel.PropertyChangedEventArgs e)
@@ -81,144 +89,116 @@ private void OkClicked(object sender, EventArgs e)
8189

8290
}
8391

84-
private void PdfViewer_AnnotationAdded(object? sender, AnnotationEventArgs e)
85-
{
86-
if ((bool)MarkRedaction.IsChecked && e.Annotation is SquareAnnotation)
87-
{
88-
e.Annotation.Name = $"RedactedRect{PdfViewer.Annotations.Count}";
89-
e.Annotation.Author = "RedactedRect";
90-
AddRedact.IsEnabled = true;
91-
}
92-
else if (e.Annotation is SquareAnnotation)
93-
SelectRedactitem.IsEnabled = true;
94-
}
95-
9692
private void SensitiveInfoView_NodeChecked(object? sender, NodeCheckedEventArgs e)
9793
{
9894
if (e.Node?.Content is TreeItem treeItem)
9995
{
10096
// Access the NodeText
10197
string nodeId = treeItem.NodeId;
10298
string nodeText = treeItem.NodeText;
103-
// Add or remove annotation for "Select All" nodes
99+
// Add or remove Redaction mark for "Select All" nodes
104100
if (nodeId == "Select All")
105101
{
106102
foreach (TreeItem item in ViewModel.ChildNodes)
107103
{
104+
RectF bounds = new RectF()
105+
{
106+
X = item.Bounds.X,
107+
Y = item.Bounds.Y,
108+
Width = item.Bounds.Width,
109+
Height = item.Bounds.Height
110+
};
108111
if (e.Node.IsChecked == true)
109112
{
110-
// Create a rectangle annotation
111-
RectF Bounds = new RectF()
112-
{
113-
X = item.Bounds.X,
114-
Y = item.Bounds.Y,
115-
Width = item.Bounds.Width,
116-
Height = item.Bounds.Height
117-
};
118-
SquareAnnotation annotation = new SquareAnnotation(Bounds, item.PageNumber)
119-
{
120-
Color = Colors.Red, // Set stroke color
121-
BorderWidth = 1, // Set stroke thickness
122-
Name = item.NodeId // Set annotation ID
123-
};
124-
// Add the annotation to the PDF viewer
125-
PdfViewer.AddAnnotation(annotation);
113+
// Create a Reedaction Mark
114+
RedactionMark mark = new RedactionMark(bounds, item.PageNumber);
115+
PdfViewer.AddRedactionMark(mark);
126116
}
127117
else
128118
{
129-
// Find and remove the corresponding annotation
130-
ReadOnlyObservableCollection<Annotation> annotations = PdfViewer.Annotations;
131-
foreach (Annotation annotation in annotations)
119+
// Find and remove the corresponding Redaction Mark
120+
ReadOnlyObservableCollection<RedactionMark> redactions = PdfViewer.RedactionMarks;
121+
foreach (RedactionMark redaction in redactions)
132122
{
133-
if (annotation.Name == item.NodeId)
123+
if (redaction.Bounds == bounds && redaction.PageNumber == item.PageNumber)
134124
{
135-
PdfViewer.RemoveAnnotation(annotation);
125+
PdfViewer.RemoveRedactionMark(redaction);
136126
break;
137127
}
138128
}
139129
}
140130
}
141131
}
142-
// Add or remove annotation for a specific page
132+
// Add or remove Redaction Mark for a specific page
143133
else if (nodeText.Contains("Page"))
144134
{
145135
foreach (TreeItem item in ViewModel.ChildNodes)
146136
{
147-
if (item.PageNumber == int.Parse(treeItem.NodeId))
137+
RectF bounds = new RectF()
138+
{
139+
X = item.Bounds.X,
140+
Y = item.Bounds.Y,
141+
Width = item.Bounds.Width,
142+
Height = item.Bounds.Height
143+
};
144+
if (item.PageNumber == int.Parse(treeItem?.NodeId))
148145
{
149146
if (e.Node.IsChecked == true)
150147
{
151-
// Create and add annotation for the specific page
152-
RectF Bounds = new RectF()
153-
{
154-
X = item.Bounds.X,
155-
Y = item.Bounds.Y,
156-
Width = item.Bounds.Width,
157-
Height = item.Bounds.Height
158-
};
159-
SquareAnnotation annotation = new SquareAnnotation(Bounds, item.PageNumber)
160-
{
161-
Color = Colors.Red,
162-
BorderWidth = 1,
163-
Name = item.NodeId
164-
};
165-
PdfViewer.AddAnnotation(annotation);
148+
// Create and add Redaction mark for the specific page
149+
RedactionMark mark = new RedactionMark(bounds, item.PageNumber);
150+
PdfViewer.AddRedactionMark(mark);
166151
}
167152
else
168153
{
169-
// Remove annotation for the specific page
170-
ReadOnlyObservableCollection<Annotation> annotations = PdfViewer.Annotations;
171-
foreach (Annotation annotation in annotations)
154+
// Remove Redaction mark for the specific page
155+
ReadOnlyObservableCollection<RedactionMark> redactions = PdfViewer.RedactionMarks;
156+
foreach (RedactionMark redaction in redactions)
172157
{
173-
if (annotation.Name == item.NodeId)
158+
if (redaction.Bounds == bounds && redaction.PageNumber == item.PageNumber)
174159
{
175-
PdfViewer.RemoveAnnotation(annotation);
160+
PdfViewer.RemoveRedactionMark(redaction);
176161
break;
177162
}
178163
}
179164
}
180165
}
181166
}
182167
}
183-
// Add or remove annotation for other nodes
168+
// Add or remove Redaction Marks for other nodes
184169
else
185170
{
171+
172+
// Create and Add Redaction Marks
173+
RectF bounds = new RectF()
174+
{
175+
X = treeItem.Bounds.X,
176+
Y = treeItem.Bounds.Y,
177+
Width = treeItem.Bounds.Width,
178+
Height = treeItem.Bounds.Height
179+
};
186180
// Handle other specific nodes
187181
if (e.Node.IsChecked == true)
188182
{
189-
// Create and add annotation
190-
RectF Bounds = new RectF()
191-
{
192-
X = treeItem.Bounds.X,
193-
Y = treeItem.Bounds.Y,
194-
Width = treeItem.Bounds.Width,
195-
Height = treeItem.Bounds.Height
196-
};
197-
SquareAnnotation annotation = new SquareAnnotation(Bounds, treeItem.PageNumber)
198-
{
199-
Color = Colors.Red,
200-
BorderWidth = 1,
201-
Name = treeItem.NodeId
202-
};
203-
PdfViewer.AddAnnotation(annotation);
183+
RedactionMark marks = new RedactionMark(bounds, treeItem.PageNumber);
184+
PdfViewer.AddRedactionMark(marks);
204185
}
205186
else
206187
{
207-
// Remove annotation
208-
ReadOnlyObservableCollection<Annotation> annotations = PdfViewer.Annotations;
209-
foreach (Annotation annotation in annotations)
188+
// Remove Redaction mark
189+
ReadOnlyObservableCollection<RedactionMark> redactions = PdfViewer.RedactionMarks;
190+
foreach (RedactionMark redaction in redactions)
210191
{
211-
if (annotation.Name == treeItem.NodeId)
192+
if (redaction.Bounds == bounds && redaction.PageNumber == treeItem.PageNumber)
212193
{
213-
PdfViewer.RemoveAnnotation(annotation);
194+
PdfViewer.RemoveRedactionMark(redaction);
214195
break;
215196
}
216197
}
217198
}
218199
}
219200
}
220-
if (PdfViewer.Annotations.Count >= 1 &&
221-
PdfViewer.Annotations.OfType<SquareAnnotation>().Count(a => !string.IsNullOrEmpty(a.Author) || a.Name.Contains("RedactedRect") || a.Author.Contains("RedactedRect")) >= 1)
201+
if (PdfViewer.RedactionMarks != null && PdfViewer.RedactionMarks.Count >= 0)
222202
{
223203
SelectRedactitem.IsEnabled = true;
224204
SelectRedactItem_Mobile.IsEnabled = true;
@@ -438,40 +418,7 @@ private List<string> RemovePrefix(List<string> sensitiveInfo, List<string> selec
438418
private void Redact()
439419
{
440420
MarkRedaction.IsChecked = false;
441-
MemoryStream pdf = new MemoryStream();
442-
PdfViewer.SaveDocument(pdf);
443-
PdfLoadedDocument loadedDocument = new PdfLoadedDocument(pdf);
444-
foreach (PdfLoadedPage page in loadedDocument.Pages)
445-
{
446-
List<PdfLoadedAnnotation> removeAnnotations = new List<PdfLoadedAnnotation>();
447-
foreach (PdfLoadedAnnotation annotation in page.Annotations)
448-
{
449-
// Iterate through the annotations that highlight the sensitive information and redact the content.
450-
if (annotation is PdfLoadedRectangleAnnotation)
451-
{
452-
//Check the annot for Redaction
453-
if (annotation.Name.Contains("RedactedRect") || annotation.Author.Contains("RedactedRect"))
454-
{
455-
removeAnnotations.Add(annotation);
456-
PdfRedaction redaction = new PdfRedaction(annotation.Bounds, Syncfusion.Drawing.Color.Black);
457-
page.AddRedaction(redaction);
458-
annotation.Flatten = true;
459-
}
460-
461-
}
462-
}
463-
//Remove from the Annotation list
464-
foreach (PdfLoadedAnnotation annotation in removeAnnotations)
465-
{
466-
page.Annotations.Remove(annotation);
467-
}
468-
}
469-
loadedDocument.Redact();
470-
//Reload the document to view the redaction
471-
MemoryStream stream = new MemoryStream();
472-
loadedDocument.Save(stream);
473-
PdfViewer.LoadDocument(stream);
474-
loadedDocument.Close(true);
421+
PdfViewer.RedactAsync();
475422
AddRedact.IsEnabled = false;
476423
}
477424

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