Dactyloidae iOS initial commit

mobile/ios/Client/Frontend/Browser/TabPrintPageRenderer.swift

@@ -0,0 +1,73 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import Foundation
+
+private struct PrintedPageUX {
+    static let PageInsets = CGFloat(36.0)
+    static let PageTextFont = DynamicFontHelper.defaultHelper.DefaultSmallFont
+    static let PageMarginScale = CGFloat(0.5)
+}
+
+class TabPrintPageRenderer: UIPrintPageRenderer {
+    fileprivate weak var tab: Tab?
+    let textAttributes = [NSFontAttributeName: PrintedPageUX.PageTextFont]
+    let dateString: String
+
+    required init(tab: Tab) {
+        self.tab = tab
+        let dateFormatter = DateFormatter()
+        dateFormatter.dateStyle = .short
+        dateFormatter.timeStyle = .short
+        self.dateString = dateFormatter.string(from: Date())
+
+        super.init()
+
+        self.footerHeight = PrintedPageUX.PageMarginScale * PrintedPageUX.PageInsets
+        self.headerHeight = PrintedPageUX.PageMarginScale * PrintedPageUX.PageInsets
+
+        if let tab = self.tab {
+            let formatter = tab.webView!.viewPrintFormatter()
+            formatter.perPageContentInsets = UIEdgeInsets(top: PrintedPageUX.PageInsets, left: PrintedPageUX.PageInsets, bottom: PrintedPageUX.PageInsets, right: PrintedPageUX.PageInsets)
+            addPrintFormatter(formatter, startingAtPageAt: 0)
+        }
+    }
+
+    override func drawFooterForPage(at pageIndex: Int, in headerRect: CGRect) {
+        let headerInsets = UIEdgeInsets(top: headerRect.minY, left: PrintedPageUX.PageInsets, bottom: paperRect.maxY - headerRect.maxY, right: PrintedPageUX.PageInsets)
+        let headerRect = UIEdgeInsetsInsetRect(paperRect, headerInsets)
+
+        // url on left
+        self.drawTextAtPoint(tab!.url?.displayURL?.absoluteString ?? "", rect: headerRect, onLeft: true)
+
+        // page number on right
+        let pageNumberString = "\(pageIndex + 1)"
+        self.drawTextAtPoint(pageNumberString, rect: headerRect, onLeft: false)
+    }
+
+    override func drawHeaderForPage(at pageIndex: Int, in headerRect: CGRect) {
+        let headerInsets = UIEdgeInsets(top: headerRect.minY, left: PrintedPageUX.PageInsets, bottom: paperRect.maxY - headerRect.maxY, right: PrintedPageUX.PageInsets)
+        let headerRect = UIEdgeInsetsInsetRect(paperRect, headerInsets)
+
+        // page title on left
+        self.drawTextAtPoint(tab!.displayTitle, rect: headerRect, onLeft: true)
+
+        // date on right
+        self.drawTextAtPoint(dateString, rect: headerRect, onLeft: false)
+    }
+
+    func drawTextAtPoint(_ text: String, rect: CGRect, onLeft: Bool) {
+        let size = text.size(attributes: textAttributes)
+        let x, y: CGFloat
+        if onLeft {
+            x = rect.minX
+            y = rect.midY - size.height / 2
+        } else {
+            x = rect.maxX - size.width
+            y = rect.midY - size.height / 2
+        }
+        text.draw(at: CGPoint(x: x, y: y), withAttributes: textAttributes)
+    }
+    
+}