//
//  QmlWebWindow.qml
//
//  Created by Bradley Austin Davis on 17 Dec 2015
//  Copyright 2015 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//

import QtQuick 2.5
import QtWebEngine 1.1
import QtWebChannel 1.0

import "windows" as Windows
import controlsUit 1.0 as Controls
import stylesUit 1.0

Windows.ScrollingWindow {
    id: root
    HifiConstants { id: hifi }
    title: "WebWindow"
    resizable: true
    shown: false
    // Don't destroy on close... otherwise the JS/C++ will have a dangling pointer
    destroyOnCloseButton: false
    property alias source: webview.url
    property alias scriptUrl: webview.userScriptUrl

    // This is for JS/QML communication, which is unused in a WebWindow,
    // but not having this here results in spurious warnings about a 
    // missing signal
    signal sendToScript(var message);

    signal moved(vector2d position);
    signal resized(size size);

    function notifyMoved() {
        moved(Qt.vector2d(x, y));
    }

    function notifyResized() {
        resized(Qt.size(width, height));
    }

    onXChanged: notifyMoved();
    onYChanged: notifyMoved();

    onWidthChanged: notifyResized();
    onHeightChanged: notifyResized();

    onShownChanged: {
        keyboardEnabled = HMD.active;
    }

    Item {
        width: pane.contentWidth
        implicitHeight: pane.scrollHeight

        Controls.WebView {
            id: webview
            url: "about:blank"
            anchors.fill: parent
            focus: true
            profile: HFWebEngineProfile;

            property string userScriptUrl: ""

            // Create a global EventBridge object for raiseAndLowerKeyboard.
            WebEngineScript {
                id: createGlobalEventBridge
                sourceCode: eventBridgeJavaScriptToInject
                injectionPoint: WebEngineScript.DocumentCreation
                worldId: WebEngineScript.MainWorld
            }

            // Detect when may want to raise and lower keyboard.
            WebEngineScript {
                id: raiseAndLowerKeyboard
                injectionPoint: WebEngineScript.Deferred
                sourceUrl: resourceDirectoryUrl + "/html/raiseAndLowerKeyboard.js"
                worldId: WebEngineScript.MainWorld
            }

            // User script.
            WebEngineScript {
                id: userScript
                sourceUrl: webview.userScriptUrl
                injectionPoint: WebEngineScript.DocumentReady  // DOM ready but page load may not be finished.
                worldId: WebEngineScript.MainWorld
            }

            userScripts: [ createGlobalEventBridge, raiseAndLowerKeyboard, userScript ]

            function onWebEventReceived(event) {
                if (event.slice(0, 17) === "CLARA.IO DOWNLOAD") {
                    ApplicationInterface.addAssetToWorldFromURL(event.slice(18));
                }
            }

            Component.onCompleted: {
                webChannel.registerObject("eventBridge", eventBridge);
                webChannel.registerObject("eventBridgeWrapper", eventBridgeWrapper);
                eventBridge.webEventReceived.connect(onWebEventReceived);
            }
        }
    }
}