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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt WebBrowser application.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

import QtQuick 2.5
import QtWebEngine 1.1

import QtQuick.Controls 1.0
import QtQuick.Controls.Styles 1.0
import QtQuick.Layouts 1.0
import QtQuick.Controls.Private 1.0
import QtQuick.Dialogs 1.2

import "assets"
import WebBrowser 1.0
import "Utils.js" as Utils

Item {
    id: browserWindow

    property Item currentWebView: {
        return tabView.get(tabView.currentIndex) ? tabView.get(tabView.currentIndex).item.webView : null
    }

    property string googleSearchQuery: "https://www.google.com/search?sourceid=qtbrowser&ie=UTF-8&q="

    property int toolBarSize: 80
    property string uiColor: settingsView.privateBrowsingEnabled ? "#3a4055" : "#09102b"

    property string uiSeparatorColor: "#9d9faa"

    property string toolBarSeparatorColor: "#9d9faa"

    property string toolBarFillColor: settingsView.privateBrowsingEnabled ? "#3a4055" : "#09102b"

    property string buttonPressedColor: "#41cd52"
    property string emptyBackgroundColor: "#09102b"
    property string uiHighlightColor: "#41cd52"
    property string inactivePagerColor: "#bcbdbe"
    property string textFieldStrokeColor: "#9d9faa"
    property string placeholderColor: "#a0a1a2"
    property string iconOverlayColor: "#0e202c"
    property string iconStrokeColor: "#9d9faa"
    property string defaultFontFamily: appFont

    property int gridViewPageItemCount: 8
    property int gridViewMaxBookmarks: 3 * gridViewPageItemCount
    property int tabViewMaxTabs: 10
    property int animationDuration: 200
    property int velocityThreshold: 400
    property int velocityY: 0
    property real touchY: 0
    property real touchReference: 0
    property bool touchGesture: false

    width: 1024
    height: 600
    visible: true

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

    Action {
        id: focus
        shortcut: "Ctrl+L"
        onTriggered: {
            navigation.addressBar.forceActiveFocus();
            navigation.addressBar.selectAll();
        }
    }
    Action {
        shortcut: "Ctrl+R"
        onTriggered: {
            if (currentWebView)
                currentWebView.reload()
            navigation.addressBar.forceActiveFocus()
        }
    }
    Action {
        id: newTabAction
        shortcut: "Ctrl+T"
        onTriggered: {
            tabView.get(tabView.currentIndex).item.webView.takeSnapshot()
            var tab = tabView.createEmptyTab()

            if (!tab)
                return

            navigation.addressBar.selectAll();
            tabView.makeCurrent(tabView.count - 1)
            navigation.addressBar.forceActiveFocus()
        }
    }
    Action {
        shortcut: "Ctrl+W"
        onTriggered: tabView.remove(tabView.currentIndex)
    }

    UIToolBar {
        id: tabEditToolBar

        source: "icons/Btn_Add.png"
        indicator: tabView.count

        anchors {
            left: parent.left
            right: parent.right
            top: navigation.top
        }

        visible: opacity != 0.0
        opacity: tabView.viewState == "list" ? 1.0 : 0.0
        onDoneClicked: tabView.viewState = "page"
        onOptionClicked: newTabAction.trigger()
    }

    UIToolBar {
        id: settingsToolBar
        z: 5
        title: qsTr("Settings")
        visible: opacity != 0.0

        anchors {
            left: parent.left
            right: parent.right
            top: navigation.top
        }

        onDoneClicked: {
            settingsView.save()
            settingsView.state = "disabled"
        }
    }

    UIToolBar {
        id: fullScreenBar
        z: 6
        title: qsTr("Leave Full Screen Mode")
        visible: opacity != 0.0
        opacity: tabView.viewState == "fullscreen" ? 1.0 : 0.0
        anchors {
            left: parent.left
            right: parent.right
            top: navigation.top
        }
        onDoneClicked: {
            navigation.webView.triggerWebAction(WebEngineView.ExitFullScreen);
        }
    }

    NavigationBar {
        id: navigation

        anchors {
            left: parent.left
            right: parent.right
        }
    }
    Rectangle{
        anchors.bottom: navigation.bottom
        anchors.left: navigation.left
        anchors.right: navigation.right
        height: 2
        color: "#9d9faa"
    }

    PageView {
        id: tabView
        interactive: {
            if (sslDialog.visible || homeScreen.state != "disabled" || urlDropDown.state == "enabled" || settingsView.state == "enabled")
                return false
            return true
        }

        anchors {
            top: navigation.bottom
            left: parent.left
            right: parent.right
        }

        height: inputPanel.y

        Component.onCompleted: {
            var tab = createEmptyTab()

            if (!tab)
                return

            navigation.webView = tab.webView
            var url = AppEngine.initialUrl

            navigation.load();
        }
        onCurrentIndexChanged: {
            if (!tabView.get(tabView.currentIndex))
                return
            navigation.webView = tabView.get(tabView.currentIndex).item.webView
        }
    }

    QtObject{
        id: acceptedCertificates

        property var acceptedUrls : []

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

    MessageDialog {
        id: sslDialog

        property var certErrors: []
        property var currentError: null
        visible: certErrors.length > 0
        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 = AppEngine.domainFromString(cert.url)
            acceptedCertificates.acceptedUrls.push(domain)
            cert.ignoreCertificateError()
            presentError()
        }
        onNo: reject()
        onRejected: reject()

        function reject(){
            certErrors.shift().rejectCertificate()
            presentError()
        }
        function enqueue(error){
            currentError = error
            certErrors.push(error)
            presentError()
        }
        function presentError(){
            informativeText = "SSL error from URL\n\n" + currentError.url + "\n\n" + currentError.description + "\n"
        }
    }

    Rectangle {
        id: urlDropDown
        color: "white"
        visible: navigation.visible

        property string searchString: navigation.addressBar.text

        anchors {
            left: parent.left
            right: parent.right
            top: navigation.bottom
        }

        state: "disabled"

        states: [
            State {
                name: "enabled"
                PropertyChanges {
                    target: urlDropDown
                    height: browserWindow.height - toolBarSize - 3
                }
            },
            State {
                name: "disabled"
                PropertyChanges {
                    target: urlDropDown
                    height: 0
                }
            }
        ]

        Rectangle {
            anchors.fill: parent
            color: emptyBackgroundColor
        }

        SearchProxyModel {
            id: proxy
            target: navigation.webView.navigationHistory.items
            searchString: urlDropDown.searchString
            enabled: urlDropDown.state == "enabled"
        }

        ListView {
            id: historyList
            property int remainingHeight: Math.min((historyList.count + 1) * toolBarSize, inputPanel.y - toolBarSize - 3)
            model: proxy
            clip: true
            boundsBehavior: Flickable.StopAtBounds
            footerPositioning: ListView.InlineFooter
            visible: urlDropDown.state == "enabled"

            anchors {
                top: parent.top
                left: parent.left
                right: parent.right
            }
            height: remainingHeight
            delegate: Rectangle {
                id: wrapper
                width: historyList.width
                height: toolBarSize
                color: "#09102b"
                MouseArea {
                    anchors.fill: parent
                    onClicked: {
                        if (!url)
                            return
                        navigation.webView.url = url
                        navigation.webView.forceActiveFocus()
                    }
                }

                Column {
                    width: parent.width - 60
                    height: parent.height
                    anchors {
                        verticalCenter: parent.verticalCenter
                        horizontalCenter: parent.horizontalCenter
                    }
                    Text {
                        property string highlightTitle: title ? title : ""
                        height: wrapper.height / 2
                        width: parent.width
                        elide: Text.ElideRight
                        verticalAlignment: Text.AlignBottom
                        anchors{
                            leftMargin: 30
                            rightMargin: 30
                        }
                        id: titleLabel
                        font.family: defaultFontFamily
                        font.pixelSize: 23
                        color: "white"
                        text: Utils.highlight(highlightTitle, urlDropDown.searchString)
                    }
                    Text {
                        property string highlightUrl: url ? url : ""
                        height: wrapper.height / 2 - 1
                        width: parent.width
                        elide: Text.ElideRight
                        verticalAlignment: Text.AlignTop
                        font.family: defaultFontFamily
                        font.pixelSize: 23
                        color: "white" //uiColor
                        text: Utils.highlight(highlightUrl, urlDropDown.searchString)
                    }
                    Rectangle {
                        anchors.horizontalCenter: parent.horizontalCenter
                        width: historyList.width
                        height: 1
                        color: iconStrokeColor
                    }
                }
            }
            footer: Rectangle {
                z: 5
                width: historyList.width
                height: toolBarSize
                color: "#09102b"
                MouseArea {
                    anchors.fill: parent
                    onClicked: {
                        var string = urlDropDown.searchString
                        var constructedUrl = ""
                        if (AppEngine.isUrl(string)) {
                            constructedUrl = AppEngine.fromUserInput(string)
                        } else {
                            constructedUrl = AppEngine.fromUserInput(googleSearchQuery + string)
                        }
                        navigation.webView.url = constructedUrl
                        navigation.webView.forceActiveFocus()
                    }
                }
                Row {
                    height: parent.height
                    Rectangle {
                        id: searchIcon
                        height: parent.height
                        width: height
                        color: "transparent"
                        Image {
                            anchors.centerIn: parent
                            source: "assets/icons/Btn_Search.png"
                        }
                    }
                    Text {
                        id: searchText
                        height: parent.height
                        width: historyList.width - searchIcon.width - 30
                        elide: Text.ElideRight
                        text: urlDropDown.searchString
                        verticalAlignment: Text.AlignVCenter
                        font.family: defaultFontFamily
                        font.pixelSize: 23
                        color: "white"
                    }
                }
            }
        }

        transitions: Transition {
            PropertyAnimation { property: "height"; duration: animationDuration; easing.type : Easing.InSine }
        }
    }

    HomeScreen {
        id: homeScreen
        height: parent.height - toolBarSize
        anchors {
            top: navigation.bottom
            left: parent.left
            right: parent.right
        }
    }

    SettingsView {
        id: settingsView
        height: parent.height - toolBarSize
        anchors {
            top: navigation.bottom
            left: parent.left
            right: parent.right
        }
    }
}