feat(KAN-70): integrate native workspace and update settings

native/src-tauri/src/settings.m

@@ -0,0 +1,47 @@
+#import <WebKit/WebKit.h>
+
+typedef char *(*SettingsCallback)(const char *, const char *, const char *, bool);
+typedef void (*SettingsFree)(char *);
+
+@interface KanbanSettingsHandler : NSObject <WKScriptMessageHandlerWithReply>
+@property(nonatomic, weak) WKWebView *webview;
+@property(nonatomic, copy) NSString *label;
+@property(nonatomic) SettingsCallback callback;
+@property(nonatomic) SettingsFree releaseReply;
+@end
+
+@implementation KanbanSettingsHandler
+- (void)userContentController:(WKUserContentController *)controller
+      didReceiveScriptMessage:(WKScriptMessage *)message
+                 replyHandler:(void (^)(id, NSString *))replyHandler {
+    if (message.webView != self.webview || !message.frameInfo.isMainFrame ||
+        ![message.body isKindOfClass:NSString.class]) {
+        replyHandler(nil, @"untrustedFrame");
+        return;
+    }
+    char *reply = self.callback(self.label.UTF8String,
+        message.frameInfo.request.URL.absoluteString.UTF8String,
+        [(NSString *)message.body UTF8String], message.frameInfo.isMainFrame);
+    if (!reply) { replyHandler(nil, @"bridgeUnavailable"); return; }
+    NSString *value = [NSString stringWithUTF8String:reply];
+    self.releaseReply(reply);
+    replyHandler(value, nil);
+}
+@end
+
+void install_workspace_settings(void *pointer, const char *label, const char *script,
+                                SettingsCallback callback, SettingsFree releaseReply) {
+    WKWebView *webview = (__bridge WKWebView *)pointer;
+    KanbanSettingsHandler *handler = [KanbanSettingsHandler new];
+    handler.webview = webview;
+    handler.label = [NSString stringWithUTF8String:label];
+    handler.callback = callback;
+    handler.releaseReply = releaseReply;
+    [webview.configuration.userContentController addScriptMessageHandlerWithReply:handler
+        contentWorld:WKContentWorld.pageWorld name:@"kanbanSettings"];
+    [webview.configuration.userContentController addUserScript:[[WKUserScript alloc]
+        initWithSource:[NSString stringWithUTF8String:script]
+        injectionTime:WKUserScriptInjectionTimeAtDocumentStart forMainFrameOnly:YES]];
+    // The initial document may already have started loading before the handler is attached.
+    [webview evaluateJavaScript:[NSString stringWithUTF8String:script] completionHandler:nil];
+}