Swift

JavaScript console using Callbacks

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Demonstrates console output using Chilkat JavaScript with callbacks. Swift

class jsProgress : CkoBaseProgress {

    override func ProgressInfo(name: String!, value: String!) {
        print("\(name!): \(value!)")
    }

}


func chilkatTest() {
    var success: Bool = false

    // This example demonstrates using the built-in console object.
    // The Javascript run in this example is shown below.

    // Load the JavaScript from a file.
    let sbScript = CkoStringBuilder()!
    success = sbScript.loadFile(path: "qa_data/js_tests/test_console.js", charset: "utf-8")
    if success == false {
        print("\(sbScript.lastErrorText!)")
        return
    }

    let js = CkoJs()!
    let js_progress = jsProgress()
    js.setEventCallbackObject(js_progress)
    let result = CkoJsonObject()!

    // Run the JavaScript
    // Results (not console output) go to result.
    // Note: Eval returns the completion value of the script. This is generally the value of the last evaluated expression.
    // In this case, the last evaluated expression is console.log which does not calculate a value. Therefore, it returns undefined.
    success = js.eval(jscript: sbScript, result: result)
    if success == false {
        print("\(sbScript.lastErrorText!)")
        return
    }

    // We can look at the result, which is "undefined", which is normal and expected.
    print("\(result.emit()!)")
    // The result JSON is: {"type":"undefined","value":"undefined"}

    // The console output is received using ProgressInfo callbacks.
    // The output is:

    // log: Hello World, 248, 12.05
    // 
    // error: foo:bar baz
    // 
    // warn: 1 2 3
    // 
    // log: %% %s
    // 
    // log: myApp: {
    //   "appName": "Example",
    //   "version": 1,
    //   "isDebug": true,
    //   "supportedTypes": [
    //     "string",
    //     "number",
    //     "object"
    //   ],
    //   "settings": {
    //     "maxWidgets": 1024,
    //     "allowIO": true
    //   }
    // }
    // 
    // log: App: myApp (Version 1)
    // 
    // {"type":"undefined","value":"undefined"}

}