/*

See LICENSE folder for this sample’s licensing information.

Abstract:

View controller demonstrating accessibility to various custom text attributes.

 How to use:

 With VoiceOver Cursor anywhere in the range of the vegetable list, type control-option-t,

 and VoiceOver should speak the attribute information (including the annotations), and including the list style.

*/

import Cocoa

class LinesView: NSView {

    // MARK: - Properties

    var eggPlantAnnotationRect = NSRect()

    var broccoliAnnotationRect = NSRect()

    var buyButtonRect = NSRect()

    var eggPlantAnnotationTextRect = NSRect()

    var broccoliAnnotationTextRect = NSRect()

    var buyButtonTextRect = NSRect()

    // MARK: - Drawing

    fileprivate func addLineFromPoint(point1: NSPoint, point2: NSPoint) {

        let line = NSBezierPath()

        line.move(to: point1)

        line.line(to: point2)

        line.lineWidth = 2

        NSColor.green.setStroke()

        line.stroke()

    }

    override func draw(_ dirtyRect: NSRect) {

        super.draw(dirtyRect)

        var edgeOfText = NSPoint(x: eggPlantAnnotationTextRect.maxX, y: eggPlantAnnotationTextRect.maxY)

        addLineFromPoint(point1: edgeOfText, point2: eggPlantAnnotationRect.origin)

        edgeOfText = NSPoint(x: broccoliAnnotationTextRect.maxX, y: broccoliAnnotationTextRect.maxY)

        addLineFromPoint(point1: edgeOfText, point2: broccoliAnnotationRect.origin)

        edgeOfText = NSPoint(x: buyButtonTextRect.maxX, y: buyButtonTextRect.origin.y + buyButtonTextRect.size.height)

        var newOrigin = buyButtonRect.origin

        newOrigin.y += buyButtonRect.size.height / 2

        addLineFromPoint(point1: edgeOfText, point2: newOrigin)

    }

    // MARK: - Accessibility

    override func isAccessibilityElement() -> Bool {

        return false

    }

}

// MARK: -

@available(OSX 10.13, *)

class TextAttributesViewController: NSViewController {

    // MARK: - Properties

    @IBOutlet var attributedTextView: TextAttributesTextView!

    @IBOutlet var linesView: LinesView!

    @IBOutlet var eggPlantAnnotation: NSTextField!

    @IBOutlet var broccoliAnnotation: NSTextField!

    @IBOutlet var buyButton: NSButton!

    static let fontFamilyName = "Chalkboard"

    // MARK: - View Controller Lifecycle

    override func viewDidLoad() {

        super.viewDidLoad()

        // Add the attribute elements to the text view

        attributedTextView.eggPlantAnnotation = eggPlantAnnotation

        attributedTextView.broccoliAnnotation = broccoliAnnotation

        attributedTextView.buyButton = buyButton

        // Add the title text

        let paragraphStyle = NSMutableParagraphStyle()

        paragraphStyle.alignment = NSTextAlignment.center

        let font: NSFont =

            NSFontManager.shared.font(withFamily: TextAttributesViewController.fontFamilyName,

                                      traits: NSFontTraitMask.boldFontMask,

                                      weight: 0,

                                      size: 16)!

        let titleAttributes =

            [NSAttributedStringKey.paragraphStyle: paragraphStyle, NSAttributedStringKey.font: font] as [NSAttributedStringKey : Any]

        let menu = NSAttributedString(string: NSLocalizedString("Dinner Menu\n\n", comment: "Dinner menu title"), attributes: titleAttributes)

        appendString(string: menu, textView: attributedTextView)

        // Add the content text.

        let font2: NSFont = NSFontManager.shared.font(withFamily: TextAttributesViewController.fontFamilyName,

                                         traits: NSFontTraitMask.unboldFontMask,

                                         weight: 0,

                                         size: 12)!

        let bodyAttributes = [NSAttributedStringKey.paragraphStyle: paragraphStyle,

                              NSAttributedStringKey.font: font2]

        let bodyString =

            NSAttributedString(string: NSLocalizedString("Mini Eggplant Tacos\n\nPasta Primavera with:\ncarrots\nzucchini\nbroccoli\n\nApple Pie",

                                                         comment: "Dinner menu content"),

                               attributes: bodyAttributes)

        appendString(string: bodyString, textView: attributedTextView)

        // Add the rects for the annotations.

        linesView.eggPlantAnnotationRect = eggPlantAnnotation.frame

        linesView.broccoliAnnotationRect = broccoliAnnotation.frame

        linesView.buyButtonRect = buyButton.frame

        // Add the rects for the text corresponding to the annotations.

        linesView.eggPlantAnnotationTextRect =

            frameForString(string: NSLocalizedString("Mini Eggplant Tacos", comment: "substring of dinner menu content"), index: 8)

        linesView.broccoliAnnotationTextRect =

            frameForString(string: NSLocalizedString("broccoli", comment: "substring of dinner menu content"), index: 7)

        linesView.buyButtonTextRect =

            frameForString(string: NSLocalizedString("Apple", comment: "substring of dinner menu content"), index: 1)

    }

    // MARK: - Utilities

    fileprivate func appendString(string: NSAttributedString, textView: NSTextView) {

        let insertionPosition = textView.string.characters.count

        textView.insertText(string, replacementRange: NSRange(location: insertionPosition, length: 0))

    }

    fileprivate func frameForString(string: String, index: Int) -> NSRect {

        let vocabWord1Range = attributedTextView.textStorage?.string.range(of: string)

        let realRange = NSRange(vocabWord1Range!, in: string)

        let stringAtIndexRange = NSRange(location: realRange.location + index, length: 1)

        let glyphRange = attributedTextView.layoutManager?.glyphRange(forCharacterRange: stringAtIndexRange, actualCharacterRange: nil)

        let rectInTextContainer = attributedTextView.layoutManager?.boundingRect(forGlyphRange: glyphRange!, in: attributedTextView.textContainer!)

        let rectInView = NSRect(x: (rectInTextContainer?.origin.x)! + attributedTextView.textContainerOrigin.x,

                                y: attributedTextView.textContainerOrigin.y + (rectInTextContainer?.origin.y)! + (rectInTextContainer?.size.height)!,

                                width: (rectInTextContainer?.size.width)!,

                                height: (rectInTextContainer?.size.height)!)

        return attributedTextView.convert(rectInView, to: linesView)

    }

    // MARK: - Actions

    @IBAction func buyApplePie(_ sender: Any) {

        print("Buy Apple Pie")

    }

}