/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWebEngine module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
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** as follows:
**
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** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
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****************************************************************************/

import Qt.labs.settings 1.0
import QtQml 2.2
import QtQuick 2.2
import QtQuick.Controls 1.0
import QtQuick.Controls.Private 1.0 as QQCPrivate
import QtQuick.Controls.Styles 1.0
import QtQuick.Dialogs 1.2
import QtQuick.Layouts 1.0
import QtQuick.Window 2.1
import QtWebEngine 1.10

ApplicationWindow {
    id: browserWindow
    property QtObject applicationRoot
    property Item currentWebView: tabs.currentIndex < tabs.count ? tabs.getTab(tabs.currentIndex).item : null
    property int previousVisibility: Window.Windowed

    width: 1300
    height: 900
    visible: true
    title: currentWebView && currentWebView.title

    // Make sure the Qt.WindowFullscreenButtonHint is set on OS X.
    Component.onCompleted: flags = flags | Qt.WindowFullscreenButtonHint

    onCurrentWebViewChanged: {
        findBar.reset();
    }

    // Create a styleItem to determine the platform.
    // When using style "mac", ToolButtons are not supposed to accept focus.
    QQCPrivate.StyleItem { id: styleItem }
    property bool platformIsMac: styleItem.style == "mac"

    Settings {
        id : appSettings
        property alias autoLoadImages: loadImages.checked
        property alias javaScriptEnabled: javaScriptEnabled.checked
        property alias errorPageEnabled: errorPageEnabled.checked
        property alias pluginsEnabled: pluginsEnabled.checked
        property alias fullScreenSupportEnabled: fullScreenSupportEnabled.checked
        property alias autoLoadIconsForPage: autoLoadIconsForPage.checked
        property alias touchIconsEnabled: touchIconsEnabled.checked
        property alias webRTCPublicInterfacesOnly : webRTCPublicInterfacesOnly.checked
        property alias devToolsEnabled: devToolsEnabled.checked
        property alias pdfViewerEnabled: pdfViewerEnabled.checked
    }

    Action {
        shortcut: "Ctrl+D"
        onTriggered: {
            downloadView.visible = !downloadView.visible;
        }
    }
    Action {
        id: focus
        shortcut: "Ctrl+L"
        onTriggered: {
            addressBar.forceActiveFocus();
            addressBar.selectAll();
        }
    }
    Action {
        shortcut: StandardKey.Refresh
        onTriggered: {
            if (currentWebView)
                currentWebView.reload();
        }
    }
    Action {
        shortcut: StandardKey.AddTab
        onTriggered: {
            tabs.createEmptyTab(tabs.count != 0 ? currentWebView.profile : defaultProfile);
            tabs.currentIndex = tabs.count - 1;
            addressBar.forceActiveFocus();
            addressBar.selectAll();
        }
    }
    Action {
        shortcut: StandardKey.Close
        onTriggered: {
            currentWebView.triggerWebAction(WebEngineView.RequestClose);
        }
    }
    Action {
        shortcut: StandardKey.Quit
        onTriggered: browserWindow.close()
    }
    Action {
        shortcut: "Escape"
        onTriggered: {
            if (currentWebView.state == "FullScreen") {
                browserWindow.visibility = browserWindow.previousVisibility;
                fullScreenNotification.hide();
                currentWebView.triggerWebAction(WebEngineView.ExitFullScreen);
            }

            if (findBar.visible)
                findBar.visible = false;
        }
    }
    Action {
        shortcut: "Ctrl+0"
        onTriggered: currentWebView.zoomFactor = 1.0
    }
    Action {
        shortcut: StandardKey.ZoomOut
        onTriggered: currentWebView.zoomFactor -= 0.1
    }
    Action {
        shortcut: StandardKey.ZoomIn
        onTriggered: currentWebView.zoomFactor += 0.1
    }

    Action {
        shortcut: StandardKey.Copy
        onTriggered: currentWebView.triggerWebAction(WebEngineView.Copy)
    }
    Action {
        shortcut: StandardKey.Cut
        onTriggered: currentWebView.triggerWebAction(WebEngineView.Cut)
    }
    Action {
        shortcut: StandardKey.Paste
        onTriggered: currentWebView.triggerWebAction(WebEngineView.Paste)
    }
    Action {
        shortcut: "Shift+"+StandardKey.Paste
        onTriggered: currentWebView.triggerWebAction(WebEngineView.PasteAndMatchStyle)
    }
    Action {
        shortcut: StandardKey.SelectAll
        onTriggered: currentWebView.triggerWebAction(WebEngineView.SelectAll)
    }
    Action {
        shortcut: StandardKey.Undo
        onTriggered: currentWebView.triggerWebAction(WebEngineView.Undo)
    }
    Action {
        shortcut: StandardKey.Redo
        onTriggered: currentWebView.triggerWebAction(WebEngineView.Redo)
    }
    Action {
        shortcut: StandardKey.Back
        onTriggered: currentWebView.triggerWebAction(WebEngineView.Back)
    }
    Action {
        shortcut: StandardKey.Forward
        onTriggered: currentWebView.triggerWebAction(WebEngineView.Forward)
    }
    Action {
        shortcut: StandardKey.Find
        onTriggered: {
            if (!findBar.visible)
                findBar.visible = true;
        }
    }
    Action {
        shortcut: StandardKey.FindNext
        onTriggered: findBar.findNext()
    }
    Action {
        shortcut: StandardKey.FindPrevious
        onTriggered: findBar.findPrevious()
    }

    toolBar: ToolBar {
        id: navigationBar
            RowLayout {
                anchors.fill: parent
                ToolButton {
                    enabled: currentWebView && (currentWebView.canGoBack || currentWebView.canGoForward)
                    menu:Menu {
                        id: historyMenu

                        Instantiator {
                            model: currentWebView && currentWebView.navigationHistory.items
                            MenuItem {
                                text: model.title
                                onTriggered: currentWebView.goBackOrForward(model.offset)
                                checkable: !enabled
                                checked: !enabled
                                enabled: model.offset
                            }

                            onObjectAdded: function(index, object) {
                                historyMenu.insertItem(index, object)
                            }
                            onObjectRemoved: function(index, object) {
                                historyMenu.removeItem(object)
                            }
                        }
                    }
                }

                ToolButton {
                    id: backButton
                    iconSource: "icons/go-previous.png"
                    onClicked: currentWebView.goBack()
                    enabled: currentWebView && currentWebView.canGoBack
                    activeFocusOnTab: !browserWindow.platformIsMac
                }
                ToolButton {
                    id: forwardButton
                    iconSource: "icons/go-next.png"
                    onClicked: currentWebView.goForward()
                    enabled: currentWebView && currentWebView.canGoForward
                    activeFocusOnTab: !browserWindow.platformIsMac
                }
                ToolButton {
                    id: reloadButton
                    iconSource: currentWebView && currentWebView.loading ? "icons/process-stop.png" : "icons/view-refresh.png"
                    onClicked: currentWebView && currentWebView.loading ? currentWebView.stop() : currentWebView.reload()
                    activeFocusOnTab: !browserWindow.platformIsMac
                }
                TextField {
                    id: addressBar
                    Image {
                        anchors.verticalCenter: addressBar.verticalCenter;
                        x: 5
                        z: 2
                        id: faviconImage
                        width: 16; height: 16
                        sourceSize: Qt.size(width, height)
                        source: currentWebView && currentWebView.icon ? currentWebView.icon : ''
                    }
                    style: TextFieldStyle {
                        padding {
                            left: 26;
                        }
                    }
                    focus: true
                    Layout.fillWidth: true
                    text: currentWebView && currentWebView.url
                    onAccepted: currentWebView.url = utils.fromUserInput(text)
                }
                ToolButton {
                    id: settingsMenuButton
                    menu: Menu {
                        MenuItem {
                            id: loadImages
                            text: "Autoload images"
                            checkable: true
                            checked: WebEngine.settings.autoLoadImages
                        }
                        MenuItem {
                            id: javaScriptEnabled
                            text: "JavaScript On"
                            checkable: true
                            checked: WebEngine.settings.javascriptEnabled
                        }
                        MenuItem {
                            id: errorPageEnabled
                            text: "ErrorPage On"
                            checkable: true
                            checked: WebEngine.settings.errorPageEnabled
                        }
                        MenuItem {
                            id: pluginsEnabled
                            text: "Plugins On"
                            checkable: true
                            checked: true
                        }
                        MenuItem {
                            id: fullScreenSupportEnabled
                            text: "FullScreen On"
                            checkable: true
                            checked: WebEngine.settings.fullScreenSupportEnabled
                        }
                        MenuItem {
                            id: offTheRecordEnabled
                            text: "Off The Record"
                            checkable: true
                            checked: currentWebView && currentWebView.profile === otrProfile
                            onToggled: function(checked) {
                                if (currentWebView) {
                                    currentWebView.profile = checked ? otrProfile : defaultProfile;
                                }
                            }
                        }
                        MenuItem {
                            id: httpDiskCacheEnabled
                            text: "HTTP Disk Cache"
                            checkable: currentWebView && !currentWebView.profile.offTheRecord
                            checked: currentWebView && (currentWebView.profile.httpCacheType === WebEngineProfile.DiskHttpCache)
                            onToggled: function(checked) {
                                if (currentWebView) {
                                    currentWebView.profile.httpCacheType = checked ? WebEngineProfile.DiskHttpCache : WebEngineProfile.MemoryHttpCache;
                                }
                            }
                        }
                        MenuItem {
                            id: autoLoadIconsForPage
                            text: "Icons On"
                            checkable: true
                            checked: WebEngine.settings.autoLoadIconsForPage
                        }
                        MenuItem {
                            id: touchIconsEnabled
                            text: "Touch Icons On"
                            checkable: true
                            checked: WebEngine.settings.touchIconsEnabled
                            enabled: autoLoadIconsForPage.checked
                        }
                        MenuItem {
                            id: webRTCPublicInterfacesOnly
                            text: "WebRTC Public Interfaces Only"
                            checkable: true
                            checked: WebEngine.settings.webRTCPublicInterfacesOnly
                        }
                        MenuItem {
                            id: devToolsEnabled
                            text: "Open DevTools"
                            checkable: true
                            checked: false
                        }
                        MenuItem {
                            id: pdfViewerEnabled
                            text: "PDF viewer enabled"
                            checkable: true
                            checked: WebEngine.settings.pdfViewerEnabled
                        }
                    }
                }
            }
            ProgressBar {
                id: progressBar
                height: 3
                anchors {
                    left: parent.left
                    top: parent.bottom
                    right: parent.right
                    leftMargin: -parent.leftMargin
                    rightMargin: -parent.rightMargin
                }
                style: ProgressBarStyle {
                    background: Item {}
                }
                z: -2;
                minimumValue: 0
                maximumValue: 100
                value: (currentWebView && currentWebView.loadProgress < 100) ? currentWebView.loadProgress : 0
            }
    }

    TabView {
        id: tabs
        function createEmptyTab(profile) {
            var tab = addTab("", tabComponent);
            // We must do this first to make sure that tab.active gets set so that tab.item gets instantiated immediately.
            tab.active = true;
            tab.title = Qt.binding(function() { return tab.item.title ? tab.item.title : 'New Tab' });
            tab.item.profile = profile;
            return tab;
        }

        function indexOfView(view) {
            for (let i = 0; i < tabs.count; ++i)
                if (tabs.getTab(i).item == view)
                    return i
            return -1
        }

        function removeView(index) {
            if (tabs.count > 1)
                tabs.removeTab(index)
            else
                browserWindow.close();
        }

        anchors.top: parent.top
        anchors.bottom: devToolsView.top
        anchors.left: parent.left
        anchors.right: parent.right
        Component.onCompleted: createEmptyTab(defaultProfile)

        // Add custom tab view style so we can customize the tabs to include a close button
        style: TabViewStyle {
            property color frameColor: "#999"
            property color fillColor: "#eee"
            property color nonSelectedColor: "#ddd"
            frameOverlap: 1
            frame: Rectangle {
                color: "#eee"
                border.color: frameColor
            }
            tab: Rectangle {
                id: tabRectangle
                color: styleData.selected ? fillColor : nonSelectedColor
                border.width: 1
                border.color: frameColor
                implicitWidth: Math.max(text.width + 30, 80)
                implicitHeight: Math.max(text.height + 10, 20)
                Rectangle { height: 1 ; width: parent.width ; color: frameColor}
                Rectangle { height: parent.height ; width: 1; color: frameColor}
                Rectangle { x: parent.width - 2; height: parent.height ; width: 1; color: frameColor}
                Text {
                    id: text
                    anchors.left: parent.left
                    anchors.verticalCenter: parent.verticalCenter
                    anchors.leftMargin: 6
                    text: styleData.title
                    elide: Text.ElideRight
                    color: styleData.selected ? "black" : frameColor
                }
                Button {
                    anchors.right: parent.right
                    anchors.verticalCenter: parent.verticalCenter
                    anchors.rightMargin: 4
                    height: 12
                    style: ButtonStyle {
                        background: Rectangle {
                            implicitWidth: 12
                            implicitHeight: 12
                            color: control.hovered ? "#ccc" : tabRectangle.color
                            Text {text: "x" ; anchors.centerIn: parent ; color: "gray"}
                        }}
                    onClicked: tabs.removeView(styleData.index)
                }
            }
        }

        Component {
            id: tabComponent
            WebEngineView {
                id: webEngineView
                focus: true

                onLinkHovered: function(hoveredUrl) {
                    if (hoveredUrl == "")
                        hideStatusText.start();
                    else {
                        statusText.text = hoveredUrl;
                        statusBubble.visible = true;
                        hideStatusText.stop();
                    }
                }

                states: [
                    State {
                        name: "FullScreen"
                        PropertyChanges {
                            target: tabs
                            frameVisible: false
                            tabsVisible: false
                        }
                        PropertyChanges {
                            target: navigationBar
                            visible: false
                        }
                    }
                ]
                settings.autoLoadImages: appSettings.autoLoadImages
                settings.javascriptEnabled: appSettings.javaScriptEnabled
                settings.errorPageEnabled: appSettings.errorPageEnabled
                settings.pluginsEnabled: appSettings.pluginsEnabled
                settings.fullScreenSupportEnabled: appSettings.fullScreenSupportEnabled
                settings.autoLoadIconsForPage: appSettings.autoLoadIconsForPage
                settings.touchIconsEnabled: appSettings.touchIconsEnabled
                settings.webRTCPublicInterfacesOnly: appSettings.webRTCPublicInterfacesOnly
                settings.pdfViewerEnabled: appSettings.pdfViewerEnabled

                onCertificateError: function(error) {
                    error.defer();
                    sslDialog.enqueue(error);
                }

                onNewViewRequested: function(request) {
                    if (!request.userInitiated)
                        print("Warning: Blocked a popup window.");
                    else if (request.destination === WebEngineView.NewViewInTab) {
                        var tab = tabs.createEmptyTab(currentWebView.profile);
                        tabs.currentIndex = tabs.count - 1;
                        request.openIn(tab.item);
                    } else if (request.destination === WebEngineView.NewViewInBackgroundTab) {
                        var backgroundTab = tabs.createEmptyTab(currentWebView.profile);
                        request.openIn(backgroundTab.item);
                    } else if (request.destination === WebEngineView.NewViewInDialog) {
                        var dialog = applicationRoot.createDialog(currentWebView.profile);
                        request.openIn(dialog.currentWebView);
                    } else {
                        var window = applicationRoot.createWindow(currentWebView.profile);
                        request.openIn(window.currentWebView);
                    }
                }

                onFullScreenRequested: function(request) {
                    if (request.toggleOn) {
                        webEngineView.state = "FullScreen";
                        browserWindow.previousVisibility = browserWindow.visibility;
                        browserWindow.showFullScreen();
                        fullScreenNotification.show();
                    } else {
                        webEngineView.state = "";
                        browserWindow.visibility = browserWindow.previousVisibility;
                        fullScreenNotification.hide();
                    }
                    request.accept();
                }

                onQuotaRequested: function(request) {
                    if (request.requestedSize <= 5 * 1024 * 1024)
                        request.accept();
                    else
                        request.reject();
                }

                onRegisterProtocolHandlerRequested: function(request) {
                    console.log("accepting registerProtocolHandler request for "
                                + request.scheme + " from " + request.origin);
                    request.accept();
                }

                onRenderProcessTerminated: function(terminationStatus, exitCode) {
                    var status = "";
                    switch (terminationStatus) {
                    case WebEngineView.NormalTerminationStatus:
                        status = "(normal exit)";
                        break;
                    case WebEngineView.AbnormalTerminationStatus:
                        status = "(abnormal exit)";
                        break;
                    case WebEngineView.CrashedTerminationStatus:
                        status = "(crashed)";
                        break;
                    case WebEngineView.KilledTerminationStatus:
                        status = "(killed)";
                        break;
                    }

                    print("Render process exited with code " + exitCode + " " + status);
                    reloadTimer.running = true;
                }

                onWindowCloseRequested: tabs.removeView(tabs.indexOfView(webEngineView))

                onSelectClientCertificate: function(selection) {
                    selection.certificates[0].select();
                }

                onFindTextFinished: function(result) {
                    if (!findBar.visible)
                        findBar.visible = true;

                    findBar.numberOfMatches = result.numberOfMatches;
                    findBar.activeMatch = result.activeMatch;
                }

                onLoadingChanged: function(loadRequest) {
                    if (loadRequest.status == WebEngineView.LoadStartedStatus)
                        findBar.reset();
                }

                Timer {
                    id: reloadTimer
                    interval: 0
                    running: false
                    repeat: false
                    onTriggered: currentWebView.reload()
                }
            }
        }
    }
    WebEngineView {
        id: devToolsView
        visible: devToolsEnabled.checked
        height: visible ? 400 : 0
        inspectedView: visible && tabs.currentIndex < tabs.count ? tabs.getTab(tabs.currentIndex).item : null
        anchors.left: parent.left
        anchors.right: parent.right
        anchors.bottom: parent.bottom
        onNewViewRequested: function(request) {
            var tab = tabs.createEmptyTab(currentWebView.profile);
            tabs.currentIndex = tabs.count - 1;
            request.openIn(tab.item);
        }
    }
    MessageDialog {
        id: sslDialog

        property var certErrors: []
        icon: StandardIcon.Warning
        standardButtons: StandardButton.No | StandardButton.Yes
        title: "Server's certificate not trusted"
        text: "Do you wish to continue?"
        detailedText: "If you wish so, you may continue with an unverified certificate. " +
                      "Accepting an unverified certificate means " +
                      "you may not be connected with the host you tried to connect to.\n" +
                      "Do you wish to override the security check and continue?"
        onYes: {
            certErrors.shift().ignoreCertificateError();
            presentError();
        }
        onNo: reject()
        onRejected: reject()

        function reject(){
            certErrors.shift().rejectCertificate();
            presentError();
        }
        function enqueue(error){
            certErrors.push(error);
            presentError();
        }
        function presentError(){
            visible = certErrors.length > 0
        }
    }

    FullScreenNotification {
        id: fullScreenNotification
    }

    DownloadView {
        id: downloadView
        visible: false
        anchors.fill: parent
    }

    function onDownloadRequested(download) {
        downloadView.visible = true;
        downloadView.append(download);
        download.accept();
    }

    FindBar {
        id: findBar
        visible: false
        anchors.right: parent.right
        anchors.rightMargin: 10
        anchors.top: parent.top

        onFindNext: {
            if (text)
                currentWebView && currentWebView.findText(text);
            else if (!visible)
                visible = true;
        }
        onFindPrevious: {
            if (text)
                currentWebView && currentWebView.findText(text, WebEngineView.FindBackward);
            else if (!visible)
                visible = true;
        }
    }


    Rectangle {
        id: statusBubble
        color: "oldlace"
        property int padding: 8
        visible: false

        anchors.left: parent.left
        anchors.bottom: parent.bottom
        width: statusText.paintedWidth + padding
        height: statusText.paintedHeight + padding

        Text {
            id: statusText
            anchors.centerIn: statusBubble
            elide: Qt.ElideMiddle

            Timer {
                id: hideStatusText
                interval: 750
                onTriggered: {
                    statusText.text = "";
                    statusBubble.visible = false;
                }
            }
        }
    }
}