Override preferences export

Author: dteoh

devdocs-macos/DocumentationViewController.swift

@@ -141,6 +141,10 @@ class DocumentationViewController: NSViewController {
         }
     }
 
+    func overridePreferencesExport() {
+        webView.evaluateJavaScript("overridePreferencesExport();")
+    }
+
     private func addFeatureScripts(_ controller: WKUserContentController) {
         if let pageObserverScript = readUserScript("page-observer") {
             let pageObserver = WKUserScript(source: pageObserverScript,
@@ -202,11 +206,19 @@ class DocumentationViewController: NSViewController {
     private func handleAppReboot() {
         webView.reload()
     }
+
+    private func handleExportPreferences(_ args: [AnyHashable: Any]) {
+        guard let preferences = args["preferences"] as! String? else {
+            return
+        }
+        delegate?.savePreferencesToFile(preferences)
+    }
 }
 
 protocol DocumentationViewDelegate: class {
     typealias OpenPanelParameters = WKOpenPanelParameters
     func selectFileToOpen(_ parameters: OpenPanelParameters, completionHandler: @escaping ([URL]?) -> Void)
+    func savePreferencesToFile(_ preferences: String)
 }
 
 // MARK:- WKUIDelegate
@@ -277,6 +289,11 @@ extension DocumentationViewController: WKScriptMessageHandler {
             handleLocationNotification(args)
         case "appReboot":
             handleAppReboot()
+        case "exportPreferences":
+            guard let args = msg["args"] as? [AnyHashable: Any] else {
+                return
+            }
+            handleExportPreferences(args)
         default:
             return
         }

devdocs-macos/DocumentationWindowController.swift

@@ -57,6 +57,7 @@ class DocumentationWindowController: NSWindowController {
             return
         }
 
+        dvc.overridePreferencesExport()
         dvc.useNativeScrollbars(true)
 
         guard let window = self.window else { return }
@@ -129,4 +130,22 @@ extension DocumentationWindowController: DocumentationViewDelegate {
             }
         }
     }
+
+    func savePreferencesToFile(_ preferences: String) {
+        let panel = NSSavePanel()
+        panel.nameFieldStringValue = "devdocs-preferences.json"
+        panel.allowedFileTypes = ["json"]
+        panel.allowsOtherFileTypes = false
+        panel.isExtensionHidden = false
+
+        panel.beginSheetModal(for: self.window!) { modalResponse in
+            if modalResponse == NSApplication.ModalResponse.OK, let url = panel.url {
+                do {
+                    try preferences.write(to: url, atomically: true, encoding: .utf8)
+                } catch {
+                    NSApplication.shared.presentError(error)
+                }
+            }
+        }
+    }
 }

devdocs-macos/user-scripts/ui-settings.js

@@ -20,3 +20,17 @@ window.useNativeScrollbars = function (enable) {
     sp.toggleLayout('_native-scrollbars', enable)
   })
 }
+
+window.overridePreferencesExport = function () {
+  requestAnimationFrame(() => {
+    app.document.content.settingsPage.export = () => {
+      const preferences = JSON.stringify(app.settings.export())
+      window.webkit.messageHandlers.vcBus.postMessage({
+        type: 'exportPreferences',
+        args: {
+          preferences
+        }
+      })
+    }
+  })
+}