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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtWebEngine module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** 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.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

import QtQuick 2.1
import QtWebEngine 1.1
import QtWebEngine.experimental 1.0

import QtQuick.Controls 1.0
import QtQuick.Controls.Styles 1.0
import QtQuick.Layouts 1.0
import QtQuick.Window 2.1
import QtQuick.Controls.Private 1.0
import Qt.labs.settings 1.0
import QtQuick.Dialogs 1.2

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

    property bool isFullScreen: visibility == Window.FullScreen
    onIsFullScreenChanged: {
        // This is for the case where the system forces us to leave fullscreen.
        if (currentWebView && !isFullScreen) {
            currentWebView.state = ""
            if (currentWebView.isFullScreen)
                currentWebView.fullScreenCancelled()
        }
    }

    height: 600
    width: 800
    visible: true
    title: currentWebView && currentWebView.title

    Settings {
        id : appSettings
        property alias autoLoadImages: loadImages.checked;
        property alias javaScriptEnabled: javaScriptEnabled.checked;
        property alias errorPageEnabled: errorPageEnabled.checked;
        property alias pluginsEnabled: pluginsEnabled.checked;
    }

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

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

    Action {
        shortcut: "Ctrl+D"
        onTriggered: {
            downloadView.visible = !downloadView.visible
        }
    }

    Action {
        id: focus
        shortcut: "Ctrl+L"
        onTriggered: {
            addressBar.forceActiveFocus();
            addressBar.selectAll();
        }
    }
    Action {
        shortcut: "Ctrl+R"
        onTriggered: {
            if (currentWebView)
                currentWebView.reload()
        }
    }
    Action {
        shortcut: "Ctrl+T"
        onTriggered: {
            tabs.createEmptyTab(currentWebView.profile)
            tabs.currentIndex = tabs.count - 1
            addressBar.forceActiveFocus();
            addressBar.selectAll();
        }
    }
    Action {
        shortcut: "Ctrl+W"
        onTriggered: {
            if (tabs.count == 1)
                browserWindow.close()
            else
                tabs.removeTab(tabs.currentIndex)
        }
    }

    Action {
        shortcut: "Escape"
        onTriggered: {
            if (browserWindow.isFullScreen)
                browserWindow.visibility = browserWindow.previousVisibility
        }
    }
    Action {
        shortcut: "Ctrl+0"
        onTriggered: zoomController.reset()
    }
    Action {
        shortcut: "Ctrl+-"
        onTriggered: zoomController.zoomOut()
    }
    Action {
        shortcut: "Ctrl+="
        onTriggered: zoomController.zoomIn()
    }

    Menu {
        id: backHistoryMenu

        Instantiator {
            model: currentWebView && currentWebView.navigationHistory.backItems
            MenuItem {
                text: model.title
                onTriggered: currentWebView.goBackOrForward(model.offset)
            }

            onObjectAdded: backHistoryMenu.insertItem(index, object)
            onObjectRemoved: backHistoryMenu.removeItem(object)
        }
    }

    Menu {
        id: forwardHistoryMenu

        Instantiator {
            model: currentWebView && currentWebView.navigationHistory.forwardItems
            MenuItem {
                text: model.title
                onTriggered: currentWebView.goBackOrForward(model.offset)
            }

            onObjectAdded: forwardHistoryMenu.insertItem(index, object)
            onObjectRemoved: forwardHistoryMenu.removeItem(object)
        }
    }

    toolBar: ToolBar {
        id: navigationBar
            RowLayout {
                anchors.fill: parent;
                ButtonWithMenu {
                    id: backButton
                    iconSource: "icons/go-previous.png"
                    enabled: currentWebView && currentWebView.canGoBack
                    activeFocusOnTab: !browserWindow.platformIsMac
                    onClicked: currentWebView.goBack()
                    longPressMenu: backHistoryMenu
                }
                ButtonWithMenu {
                    id: forwardButton
                    iconSource: "icons/go-next.png"
                    enabled: currentWebView && currentWebView.canGoForward
                    activeFocusOnTab: !browserWindow.platformIsMac
                    onClicked: currentWebView.goForward()
                    longPressMenu: forwardHistoryMenu
                }
                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
                        source: currentWebView && 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: true
                        }
                        MenuItem {
                            id: javaScriptEnabled
                            text: "JavaScript On"
                            checkable: true
                            checked: true
                        }
                        MenuItem {
                            id: errorPageEnabled
                            text: "ErrorPage On"
                            checkable: true
                            checked: true
                        }
                        MenuItem {
                            id: pluginsEnabled
                            text: "Plugins On"
                            checkable: true
                            checked: true
                        }
                        MenuItem {
                            id: offTheRecordEnabled
                            text: "Off The Record"
                            checkable: true
                            checked: currentWebView.profile.offTheRecord
                            onToggled: currentWebView.profile = checked ? otrProfile : testProfile;
                        }
                        MenuItem {
                            id: httpDiskCacheEnabled
                            text: "HTTP Disk Cache"
                            checkable: !currentWebView.profile.offTheRecord
                            checked: (currentWebView.profile.httpCacheType == WebEngineProfile.DiskHttpCache)
                            onToggled: currentWebView.profile.httpCacheType = checked ? WebEngineProfile.DiskHttpCache : WebEngineProfile.MemoryHttpCache;
                        }
                    }
                }
            }
            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.webView.profile = profile
            return tab
        }

        anchors.fill: parent
        Component.onCompleted: createEmptyTab(testProfile)

        Component {
            id: tabComponent
            Item {
                property alias webView: webEngineView
                property alias title: webEngineView.title
                Action {
                    shortcut: "Ctrl+F"
                    onTriggered: {
                        findBar.visible = !findBar.visible
                        if (findBar.visible) {
                            findTextField.forceActiveFocus()
                        }
                    }
                }
                FeaturePermissionBar {
                    id: permBar
                    view: webEngineView
                    anchors {
                        left: parent.left
                        right: parent.right
                        top: parent.top
                    }
                    z: 3
                }

                WebEngineView {
                    id: webEngineView

                    anchors {
                        fill: parent
                        top: permBar.bottom
                    }

                    focus: true

                    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

                    onCertificateError: {
                        if (!acceptedCertificates.shouldAutoAccept(error)){
                            error.defer()
                            sslDialog.enqueue(error)
                        } else{
                            error.ignoreCertificateError()
                        }
                    }

                    onNewViewRequested: {
                        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.webView)
                        } else if (request.destination == WebEngineView.NewViewInBackgroundTab) {
                            var tab = tabs.createEmptyTab(currentWebView.profile)
                            request.openIn(tab.item.webView)
                        } 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: {
                        if (request.toggleOn) {
                            webEngineView.state = "FullScreen"
                            browserWindow.previousVisibility = browserWindow.visibility
                            browserWindow.showFullScreen()
                        } else {
                            webEngineView.state = ""
                            browserWindow.visibility = browserWindow.previousVisibility
                        }
                        request.accept()
                    }

                    onFeaturePermissionRequested: {
                        permBar.securityOrigin = securityOrigin;
                        permBar.requestedFeature = feature;
                        permBar.visible = true;
                    }

                    experimental {
                        extraContextMenuEntriesComponent: ContextMenuExtras {}
                    }
                }

                Rectangle {
                    id: findBar
                    anchors.top: webEngineView.top
                    anchors.right: webEngineView.right
                    width: 240
                    height: 35
                    border.color: "lightgray"
                    border.width: 1
                    radius: 5
                    visible: false
                    color: browserWindow.color

                    RowLayout {
                        anchors.centerIn: findBar
                        TextField {
                            id: findTextField
                            onAccepted: {
                                webEngineView.findText(text)
                            }
                        }
                        ToolButton {
                            id: findBackwardButton
                            iconSource: "icons/go-previous.png"
                            onClicked: webEngineView.findText(findTextField.text, WebEngineView.FindBackward)
                        }
                        ToolButton {
                            id: findForwardButton
                            iconSource: "icons/go-next.png"
                            onClicked: webEngineView.findText(findTextField.text)
                        }
                        ToolButton {
                            id: findCancelButton
                            iconSource: "icons/process-stop.png"
                            onClicked: findBar.visible = false
                        }
                    }
                }
            }
        }
    }

    QtObject{
        id:acceptedCertificates

        property var acceptedUrls : []

        function shouldAutoAccept(certificateError){
            var domain = utils.domainFromString(certificateError.url)
            return acceptedUrls.indexOf(domain) >= 0
        }
    }

    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: {
            var cert = certErrors.shift()
            var domain = utils.domainFromString(cert.url)
            acceptedCertificates.acceptedUrls.push(domain)
            cert.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
        }
    }

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

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

    ZoomController {
      id: zoomController
      y: parent.mapFromItem(currentWebView, 0 , 0).y - 4
      anchors.right: parent.right
      width: (parent.width > 800) ? parent.width * 0.25 : 220
      anchors.rightMargin: (parent.width > 400) ? 100 : 0
    }
    Binding {
        target: currentWebView
        property: "zoomFactor"
        value: zoomController.zoomFactor
    }
}