/*

File: Voices.js

Abstract: JavaScript logic for Voices sample widget.

    This milestone uses synchronous (blocking)

    widget.system calls to speak text.

Version: 1.0

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*/

var currentlyBeingSpoken = null;

// setup() is called when the body of the widget is loaded.  Here, it introduces the widget to the user.

function setup()

{

    if(window.widget) {

        currentlyBeingSpoken = widget.system("/usr/bin/osascript -e 'say \"Welcome to Voices!\" using \"Fred\"'" , doneSpeaking);

    }

}

// voiceChanged() is called when the Voices popup menu changes.  It changes the faked menu text and announces the new voice to the user. 

function voiceChanged(elem)

{

    var chosenVoice = elem.options[elem.selectedIndex].value;

    document.getElementById("voiceMenuText").innerText = chosenVoice;

    if(window.widget) {

        if( currentlyBeingSpoken != null) {

            currentlyBeingSpoken.cancel();

            done();

        }

        currentlyBeingSpoken = widget.system("/usr/bin/osascript -e 'say \"Hi, I`m " + chosenVoice + ".\" using \"" + chosenVoice + "\"'" , doneSpeaking);  

    }

}

// speak() gets the input text, sanitizes it for use with osascript, and speaks it to the user using the currently selected voice.

function speak(event)

{

    document.getElementById("speakButton").src = "Images/Button_down.png";

    var textToSpeak = document.getElementById('textInput').value;

    var regExForSingleQuote = new RegExp ('\'', 'g') ;

    var textToSpeak = textToSpeak.replace(regExForSingleQuote, '`') ;

    var regExForDoubleQuote = new RegExp ('"', 'g') ;

    var textToSpeak = textToSpeak.replace(regExForDoubleQuote, '') ;

    var voiceMenu = document.getElementById('voicePopup');

    var chosenVoice = voiceMenu.options[voiceMenu.selectedIndex].value;

    var speakButtonText = document.getElementById("speakButtonText");

    speakButtonText.innerText = "Stop";

    var theButton = document.getElementById("theButton");

    theButton.onmousedown = null;

    theButton.onmousedown = cancel;

    if(window.widget) {

        if( currentlyBeingSpoken != null) {

            currentlyBeingSpoken.cancel();

        }

        currentlyBeingSpoken = widget.system("/usr/bin/osascript -e 'say \"" + textToSpeak + "\" using \"" + chosenVoice + "\"'" , done);   

    }

}

// cancel() is called with the user wants to stop the widget from speaking

function cancel(event)

{

    if(window.widget) {

        currentlyBeingSpoken.cancel();

    }

    document.getElementById("speakButton").src = "Images/Button_down.png";

    done();

}

// done() is used as an end handler for widget.system and is called when the user cancels speaking.  It does cleanup of the interface. 

function done()

{

    var speakButtonText = document.getElementById("speakButtonText");

    speakButtonText.innerText = "Speak";

    var theButton = document.getElementById("theButton");

    theButton.onmousedown = null;

    theButton.onmousedown = speak;

    doneSpeaking();

}

// doneSpeaking() is the end handler for the two introductions and is called at the end of done().  It clears out the global keeping track of the currently spoken command.

function doneSpeaking()

{

    currentlyBeingSpoken = null;

}

// buttonUpOut() switches the button image to the unclicked version.

function buttonUpOut()

{

    document.getElementById("speakButton").src = "Images/Button.png";

}

// removed() is called when the widget is removed from the Dashboard; it stops any speaking that might be happening

function removed()

{

    if( currentlyBeingSpoken != null) {

        currentlyBeingSpoken.cancel();

    }

}

// here we register for widget events that interest us.

if(window.widget)

{

    widget.onremove = removed;

}