fix: fix table outline frame calculations; removed conditional render…

…ing of outline (#396)

Co-authored-by: Philip Niedertscheider <me@philprime.dev>
Co-authored-by: Philip Niedertscheider <phil@techprimate.com>

Source/API/Utils/PDFRenderObject.swift

@@ -22,6 +22,11 @@ public class PDFRenderObject: CustomStringConvertible {
 
     ///  Attributes set for this object, and their calculated frame
     var attributes: [(attribute: PDFObjectAttribute, frame: CGRect)] = []
+
+    init(frame: CGRect = .null, attributes: [(attribute: PDFObjectAttribute, frame: CGRect)] = []) {
+        self.frame = frame
+        self.attributes = attributes
+    }
 
     /**
      * Calculates the object and returns all calculated objects which are created by this calculated.

Source/Internal/Graphics/PDFRectangleObject.swift

@@ -22,11 +22,6 @@ class PDFRectangleObject: PDFRenderObject {
      */
     var lineStyle: PDFLineStyle
 
-    /**
-     Defines the size of the rectangle
-     */
-    var size: CGSize
-
     /**
      Defines the fill color the rectangle
      */
@@ -39,10 +34,10 @@ class PDFRectangleObject: PDFRenderObject {
      - Parameter size: Size of rectangle, defaults to `CGSize.zero`
      - Parameter fillColor: Fill color, defaults to `Color.clear`
      */
-    init(lineStyle: PDFLineStyle = PDFLineStyle(), size: CGSize = CGSize.zero, fillColor: Color = Color.clear) {
+    init(lineStyle: PDFLineStyle = PDFLineStyle(), frame: CGRect = CGRect.zero, fillColor: Color = Color.clear) {
         self.lineStyle = lineStyle
-        self.size = size
         self.fillColor = fillColor
+        super.init(frame: frame)
     }
 
     /**
@@ -56,9 +51,9 @@ class PDFRectangleObject: PDFRenderObject {
      - Returns: Self
      */
     override func calculate(generator: PDFGenerator, container: PDFContainer) throws -> [PDFLocatedRenderObject] {
-        let position = PDFCalculations.calculateElementPosition(for: generator, in: container, with: size)
+        let position = PDFCalculations.calculateElementPosition(for: generator, in: container, with: frame.size)
 
-        frame = CGRect(origin: position, size: size)
+        frame = CGRect(origin: position, size: frame.size)
 
         return [(container, self)]
     }
@@ -80,6 +75,6 @@ class PDFRectangleObject: PDFRenderObject {
      Creates new `PDFRectangleObject` with the same properties
      */
     override var copy: PDFRenderObject {
-        PDFRectangleObject(lineStyle: lineStyle, size: size, fillColor: fillColor)
+        PDFRectangleObject(lineStyle: lineStyle, frame: frame, fillColor: fillColor)
     }
 }

Source/Internal/Section/PDFSectionObject.swift

@@ -167,8 +167,7 @@ class PDFSectionObject: PDFRenderObject {
                         continue
                     }
                     let frame = CGRect(x: met.minX, y: sectionMinY, width: met.width, height: sectionMaxY - sectionMinY)
-                    let rect = PDFRectangleObject(lineStyle: .none, size: frame.size, fillColor: backgroundColor)
-                    rect.frame = frame
+                    let rect = PDFRectangleObject(lineStyle: .none, frame: frame, fillColor: backgroundColor)
                     result += [(container, rect)] + columnObjects
                 }
             }

Source/Internal/Table/PDFTableObject.swift

@@ -289,6 +289,7 @@ class PDFTableObject: PDFRenderObject {
 
         repeat {
             var pageStart = CGPoint.null
+            pageEnd = CGPoint()
 
             // Calculate top page inset
             var minOffset = PDFCalculations.calculateTopMinimum(for: generator)
@@ -303,9 +304,12 @@ class PDFTableObject: PDFRenderObject {
                     cellFrame.origin.y += table.margin
                     contentFrame.origin.y -= startPosition.y - minOffset
                     contentFrame.origin.y += table.margin
-
-                    pageStart = pageStart == .null ? cellFrame.origin : pageStart
-                    pageEnd = CGPoint(x: cellFrame.maxX, y: cellFrame.maxY) + CGPoint(x: table.margin, y: table.margin)
+
+                    // Maintain pageStart and pageEnd
+                    pageStart.x = min(cellFrame.minX, pageStart.x)
+                    pageStart.y = min(cellFrame.minY, pageStart.y)
+                    pageEnd.x = max(cellFrame.maxX, pageEnd.x)
+                    pageEnd.y = max(cellFrame.maxY, pageEnd.y)
 
                     var cellElements = [PDFRenderObject]()
 
@@ -362,13 +366,14 @@ class PDFTableObject: PDFRenderObject {
                 throw PDFError.tableCellTooBig(cell: firstInvalidCell.cell)
             }
 
-            for (idx, item) in onPageCells.enumerated() {
+            for item in onPageCells {
                 let cellFrame = item.frames.cell
 
-                if pageStart == CGPoint.null {
-                    pageStart = cellFrame.origin - CGPoint(x: table.margin, y: table.margin)
-                }
-                pageEnd = CGPoint(x: cellFrame.maxX, y: cellFrame.maxY) + CGPoint(x: table.margin, y: table.margin)
+                // Maintain pageStart and pageEnd
+                pageStart.x = min(cellFrame.minX, pageStart.x)
+                pageStart.y = min(cellFrame.minY, pageStart.y)
+                pageEnd.x = max(cellFrame.maxX, pageEnd.x)
+                pageEnd.y = max(cellFrame.maxY, pageEnd.y)
 
                 var cellElements = [PDFRenderObject]()
 
@@ -395,25 +400,24 @@ class PDFTableObject: PDFRenderObject {
                                                     minOffset: minOffset,
                                                     maxOffset: maxOffset)
                 result += try sliceObject.calculate(generator: generator, container: container)
-
-                if nextPageCells.isEmpty && idx == cells.count - 1 {
-                    let tableOutlineObject = PDFRectangleObject(lineStyle: table.style.outline, size: CGSize.zero)
-                    tableOutlineObject.frame = CGRect(
-                        x: pageStart.x,
-                        y: pageStart.y,
-                        width: pageEnd.x - pageStart.x,
-                        height: pageEnd.y - pageStart.y
-                    )
-                    result += try tableOutlineObject.calculate(generator: generator, container: container)
-                }
             }
+
+            // Draw the table outline for the page
+            let tableOutlineObject = PDFRectangleObject(lineStyle: table.style.outline, frame: CGRect(
+                x: pageStart.x - table.margin,
+                y: pageStart.y - table.margin,
+                width: pageEnd.x - pageStart.x + table.margin*2,
+                height: pageEnd.y - pageStart.y + table.margin*2
+            ))
+            result += [(container, tableOutlineObject)]
+
             if !nextPageCells.isEmpty {
                 result += try PDFPageBreakObject().calculate(generator: generator, container: container)
                 firstPage = false
-                pageEnd = .null
             }
         } while !nextPageCells.isEmpty
-        return (objects: result, offset: pageEnd.y)
+
+        return (objects: result, offset: pageEnd.y + table.margin)
     }
 
     /// Holds two lists of cells, used during table calculations
@@ -511,9 +515,7 @@ class PDFTableObject: PDFRenderObject {
     ///   - frame: Frame of cell
     /// - Returns: Calculated `PDFRectangleObject`
     func createCellBackgroundObject(style: PDFTableCellStyle, frame: CGRect) -> PDFRenderObject {
-        let object = PDFRectangleObject(lineStyle: .none, size: frame.size, fillColor: style.colors.fill)
-        object.frame = frame
-        return object
+        return PDFRectangleObject(lineStyle: .none, frame: frame, fillColor: style.colors.fill)
     }
 
     /**