Show Note Controller for Highlights in Swift for iOS

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//
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//  Copyright © 2021-2025 PSPDFKit GmbH. All rights reserved.
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//
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//  The Nutrient sample applications are licensed with a modified BSD license.
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//  Please see License for details. This notice may not be removed from this file.
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//
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import PSPDFKit
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import PSPDFKitUI
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class ShowNoteControllerForHighlightsExample: Example, PDFViewControllerDelegate {
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    override init() {
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        super.init()
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        title = "Directly show note controller for highlight annotations"
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        contentDescription = "Automatically show the note controller when selecting highlight annotations."
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        category = .subclassing
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        priority = 160
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    }
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    override func invoke(with delegate: ExampleRunnerDelegate) -> UIViewController? {
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        let document = AssetLoader.document(for: .cosmicContextForLife)
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        let pageIndex: PageIndex = 1
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        // Create some highlights.
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        let textParser = document.textParserForPage(at: pageIndex)!
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        let wordsToHighlight = textParser.words.filter { word in
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            word.stringValue.localizedStandardContains("galax")
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        }
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        let annotations = wordsToHighlight.map { word -> HighlightAnnotation in
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            let annotation = HighlightAnnotation()
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            var tightBoundingBox = CGRect.zero
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            annotation.rects = PSPDFRectsFromGlyphs(textParser.glyphs(in: word.range), &tightBoundingBox).map { $0.cgRectValue }
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            // Add padding to the bounding box so the highlight’s rounded edges are not clipped.
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            annotation.boundingBox = tightBoundingBox.insetBy(dx: -0.1 * tightBoundingBox.width, dy: -0.1 * tightBoundingBox.height)
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            annotation.color = #colorLiteral(red: 1, green: 0.8639183044, blue: 0, alpha: 1)
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            annotation.pageIndex = pageIndex
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            return annotation
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        }
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        document.add(annotations: annotations)
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        let pdfViewController = PDFViewController(document: document)
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        pdfViewController.delegate = self
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        pdfViewController.pageIndex = pageIndex
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        return pdfViewController
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    }
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    // MARK: - PDFViewControllerDelegate
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    func pdfViewController(_ pdfController: PDFViewController, didTapOn annotation: Annotation, annotationPoint: CGPoint, annotationView: (UIView & AnnotationPresenting)?, pageView: PDFPageView, viewPoint: CGPoint) -> Bool {
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        // Make sure this was called for a highlight annotation.
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        guard annotation.type == .highlight else {
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            return false
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        }
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        // Show the comments directly.
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        let viewController = pageView.presentComments(for: annotation)
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        // If presenting the comments failed, then we want to fall back on
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        // default touch handling.
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        return viewController != nil
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    }
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}