PDFOffice_Windows_exe/PDF Office/ViewModels/PropertyPanel/PDFEdit/TextEditPropertyViewModel.cs

using ComPDFKitViewer;
using ComPDFKitViewer.PdfViewer;
using Microsoft.Win32;
using PDF_Office.CustomControl.CompositeControl;
using PDF_Office.Helper;
using PDF_Office.Model;
using PDF_Office.Model.PropertyPanel.AnnotPanel;
using PDFSettings;
using Prism.Commands;
using Prism.Mvvm;
using Prism.Regions;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;

namespace PDF_Office.ViewModels.PropertyPanel.PDFEdit
{
    
    public class TextEditPropertyViewModel : PDFEditVM, INavigationAware
    {
        #region
        private bool isSelectedEmpty;
        public bool IsSelectedEmpty
        {
            get { return isSelectedEmpty; }
            set { SetProperty(ref isSelectedEmpty, value); }
        }
        private ComPDFKit.PDFPage.Edit.TextAlignType _textAlign;
        public ComPDFKit.PDFPage.Edit.TextAlignType TextAlign
        {
            get { return _textAlign; }
            set { _textAlign = value; }
        }
        #endregion
        #region Command

        #region 文本Command
        public DelegateCommand AddTextCommand { get; set; }
        public DelegateCommand AddImgCommand { get; set; }

        public DelegateCommand<object> SelectedColorCommand { get; set; }
        public DelegateCommand<object> SelectedFontStyleCommand { get; set; }
     
        public DelegateCommand<object> FontSizeChangedCommand { get; set; }

        public DelegateCommand<object> TextAlignCheckedCommand { get; set; }
        //进入属性面板编辑
        public DelegateCommand EditTextModeCommand { get; set; }
        public DelegateCommand CustomFontStyleCommand { get; set; }

        public DelegateCommand ReDefineFontStyleCommand { get; set; }
        public DelegateCommand RestoreDefaultStyleCommand { get; set; }
        public DelegateCommand<object> LayoutAlignCheckedCommand { get; set; }
        #endregion

        #endregion

        #region 初始化
        public TextEditPropertyViewModel()
        {
            InitVariable();
            InitCommand();
        }
        private void InitVariable()
        {
            InitBaseVariable();
        }

        private void InitCommand()
        {
            AddTextCommand = new DelegateCommand(AddText);
            AddImgCommand = new DelegateCommand(AddImg);
            SelectedColorCommand = new DelegateCommand<object>(SelectedColor);
            SelectedFontStyleCommand = new DelegateCommand<object>(SelectedFontStyle);
            FontSizeChangedCommand = new DelegateCommand<object>(FontSizeChanged);
            TextAlignCheckedCommand = new DelegateCommand<object>(TextAlignChecked);
            EditTextModeCommand = new DelegateCommand(EditTextMode);
            CustomFontStyleCommand = new DelegateCommand(CustomFontStyle_Click);
            ReDefineFontStyleCommand = new DelegateCommand(ReDefineFontStyle);
            RestoreDefaultStyleCommand = new DelegateCommand(RestoreDefaultStyle);
            LayoutAlignCheckedCommand = new DelegateCommand<object>(LayoutAlignChecked);
        }

        #endregion

        #region 文本处理

        private void AddText()
        {
            PDFViewer.SetPDFEditCreateType(ComPDFKit.PDFPage.CPDFEditType.EditText);
        }

        private void AddImg()
        {
            PDFViewer.SetPDFEditCreateType(ComPDFKit.PDFPage.CPDFEditType.EditImage);
        }
        
        private void EditTextMode()
        {

        }

        private void CustomFontStyle_Click()
        {
            if(CurrentPresetFont != null)
            {
                ContextMenu menu;
                if (CurrentPresetFont.ValueStr == "custom")
                {
                    menu = SelectAnnotContextMenu(false);
                }
                else
                {
                    menu = SelectAnnotContextMenu(true);
                }
               
                if (menu != null)
                {
                    menu.IsOpen = true;
                }
            }
            
        }
        private void ReDefineFontStyle()
        {

            var item = PresetFontList.FirstOrDefault(temp => temp.mTag == CurrentPresetFont.ValueStr);

            if (CurrentFontFamily.ValueStr == "Bold")
            {
                item.mFontStyle = FontStyles.Normal;
                item.mFontWeight = FontWeights.Bold;
            }
            else if (CurrentFontFamily.ValueStr == "Regular")
            {
                item.mFontStyle = FontStyles.Normal;
                item.mFontWeight = FontWeights.Normal;
            }
            else
            {
                item.mFontStyle = FontStyles.Italic;
                item.mFontWeight = FontWeights.Bold;
            }

            item.mFontSize = (int)CurrentFontSize.Value;

        }

        private void RestoreDefaultStyle()
        {
            var item = PresetFontList.FirstOrDefault(temp => temp.mTag == CurrentPresetFont.ValueStr);
        }

        private void LayoutAlignChecked(object obj)
        {
            if(obj != null)
            {
                if (obj != null)
                {
                    switch ((string)obj)
                    {
                        case "AlignLeft":
                            PDFViewer.SetPDFEditAligment(AlignModes.AlignLeft);
                            break;
                        case "AlignHorizonCenter":
                            PDFViewer.SetPDFEditAligment(AlignModes.AlignHorizonCenter);
                            break;
                        case "AlignRight":
                            PDFViewer.SetPDFEditAligment(AlignModes.AlignRight);
                            break;
                        case "DistributeHorizontal":
                            PDFViewer.SetPDFEditAligment(AlignModes.DistributeHorizontal);
                            break;
                        case "AlignTop":
                            PDFViewer.SetPDFEditAligment(AlignModes.AlignTop);
                            break;
                        case "AlignVerticalCenter":
                            PDFViewer.SetPDFEditAligment(AlignModes.AlignVerticalCenter);
                            break;
                        case "AlignBottom":
                            PDFViewer.SetPDFEditAligment(AlignModes.AlignBottom);
                            break;
                        case "DistributeVertical":
                            PDFViewer.SetPDFEditAligment(AlignModes.DistributeVertical);
                            break;
                    }

                }
            }
        }


        
        private void TextAlignChecked(object obj)
        {
            if ((string)obj != null && TextEditEvent != null)
            {
                switch ((string)obj)
                {
                    case "AlignLeft":
                        TextEditEvent.TextAlign = ComPDFKit.PDFPage.Edit.TextAlignType.AlignLeft;
                        break;

                    case "AlignCenter":
                        TextEditEvent.TextAlign = ComPDFKit.PDFPage.Edit.TextAlignType.AlignMiddle;
                        break;

                    case "AlignRight":
                        TextEditEvent.TextAlign = ComPDFKit.PDFPage.Edit.TextAlignType.AlignRight;
                        break;

                    case "Align":
                        TextEditEvent.TextAlign = ComPDFKit.PDFPage.Edit.TextAlignType.AlignNone;
                        break;
                }
                TextAlign = TextEditEvent.TextAlign;
                TextEditEvent.UpdatePDFEditByEventArgs();
            }
        }


        private void SelectedColor(object obj)
        {
            if (obj != null)
            {
                var colorValue = (Color)obj;
                if (colorValue != null)
                {
                    SelectColor = new SolidColorBrush(colorValue);
                }
            }
        }

        private void SelectedFontStyle(object obj)
        {
            if (obj != null && (PresetFontItem)obj != null)
            {
                var item = (PresetFontItem)obj;

            }
        }


        private void FontSizeChanged(object obj)
        {
            if (obj != null)
            {
                var item = (ComboBoxItem)obj;
                var content = (string)item.Content;
                if (content != null)
                {
                    var intData = int.Parse(content);
                    //TextFontSize = intData;
                }
            }
        }


        #endregion


        #region 布局处理
        private void ImgAlignChecked(object obj)
        {
            if (obj != null)
            {
                switch ((string)obj)
                {
                    case "AlignLeft":
                        PDFViewer.SetPDFEditAligment(AlignModes.AlignLeft);
                        break;
                    case "AlignHorizonCenter":
                        PDFViewer.SetPDFEditAligment(AlignModes.AlignHorizonCenter);
                        break;
                    case "AlignRight":
                        PDFViewer.SetPDFEditAligment(AlignModes.AlignRight);
                        break;
                    case "DistributeHorizontal":
                        PDFViewer.SetPDFEditAligment(AlignModes.DistributeHorizontal);
                        break;
                    case "AlignTop":
                        PDFViewer.SetPDFEditAligment(AlignModes.AlignTop);
                        break;
                    case "AlignVerticalCenter":
                        PDFViewer.SetPDFEditAligment(AlignModes.AlignVerticalCenter);
                        break;
                    case "AlignBottom":
                        PDFViewer.SetPDFEditAligment(AlignModes.AlignBottom);
                        break;
                    case "DistributeVertical":
                        PDFViewer.SetPDFEditAligment(AlignModes.DistributeVertical);
                        break;
                }

            }
        }

        private void ReLoadLayoutAlign(int count)
        {
            if (count >= 2)
                IsLayoutAlign = true;
            else
                IsLayoutAlign = false;

            if (count >= 3)
                IsLayoutAvgAlign = true;
            else
                IsLayoutAvgAlign = false;
        }
        #endregion

        #region 右键菜单

        //点击空白处时
        private ContextMenu EmptyStateMenu(object sender)
        {
            var popMenu = App.Current.FindResource("NoneMenu") as ContextMenu;
            CustomPopMenu customMenu = new CustomPopMenu(popMenu, sender);
            //粘贴
            customMenu.SetMenuBinding(0, ApplicationCommands.Paste);
            //添加文本
            customMenu.SetMenuBinding(1, AddTextCommand);
            //添加图像
            customMenu.SetMenuBinding(2, AddImgCommand);

            return popMenu;
        }
   
        //选中文字的框
        private ContextMenu SelectTextBorder(object sender)
        {
            var popMenu = App.Current.FindResource("SelectTextMenu") as ContextMenu;
            CustomPopMenu customMenu = new CustomPopMenu(popMenu, sender);
            //编辑
            customMenu.SetMenuBinding(0, EditTextModeCommand);
            //复制
            customMenu.SetMenuBinding(1, ApplicationCommands.Copy);
            //剪切
            customMenu.SetMenuBinding(2, ApplicationCommands.Cut);
            //粘贴
            customMenu.SetMenuBinding(3, ApplicationCommands.Paste);
            //删除
            customMenu.SetMenuBinding(4, ApplicationCommands.Delete);
         
            customMenu.SetVisibilityProperty(6, false);

            return popMenu;
        }
       
        //选中文字内容
        private ContextMenu SelectTextContent(object sender)
        {
            var popMenu = App.Current.FindResource("SelectContentMenu") as ContextMenu;
            CustomPopMenu customMenu = new CustomPopMenu(popMenu, sender);
            //复制
            customMenu.SetMenuBinding(0, ApplicationCommands.Copy);
            //剪切
            customMenu.SetMenuBinding(1, ApplicationCommands.Cut);
            //粘贴
            customMenu.SetMenuBinding(2, ApplicationCommands.Paste);
            //粘贴并匹配样式
            customMenu.SetVisibilityProperty(3, false);
            //删除
            customMenu.SetMenuBinding(4, ApplicationCommands.Delete);
            //全部选定
            customMenu.SetMenuBinding(5, ApplicationCommands.SelectAll);

            return popMenu;
        }

        #endregion


        #region 编辑PDF内容触发的事件

        /// <summary>
        /// 右键菜单的事件
        /// </summary>
        private void PDFViewer_PDFEditCommandHandler(object sender, PDFEditCommand e)
        {

            if (e == null)
                return;

            switch (e.CommandType)
            {
                case CommandType.Context:

                    if (e.EditType == ComPDFKit.PDFPage.CPDFEditType.None)
                    {
                        e.PopupMenu = EmptyStateMenu(sender);

                    }
                    else if (e.EditType == ComPDFKit.PDFPage.CPDFEditType.EditText)
                    {
                        //文字编辑
                        if (e.PressOnBorder == true)
                        {
                            e.PopupMenu = SelectTextBorder(sender);
                        }

                        if (e.PressOnSelectedText == true)
                        {
                            e.PopupMenu = SelectTextContent(sender);
                        }
                    }

                    break;

                default:
                    e.DoCommand();
                    break;

            }
            if (e.PopupMenu != null)
            {
                e.Handle = true;
            }
        }
        
        private ContextMenu SelectAnnotContextMenu(bool isEnable)
        {
            var popMenu = App.Current.FindResource("CustomFontStyleFlyoutMenu") as ContextMenu;
            if (popMenu != null && popMenu.Items.Count == 2)
            {
                //用所选部分重新定义
                MenuItem menuItem = popMenu.Items[0] as MenuItem;
                menuItem.IsEnabled = isEnable;
                menuItem.Command = ReDefineFontStyleCommand;
                //恢复默认预设样式
                menuItem = popMenu.Items[1] as MenuItem;
                menuItem.IsEnabled = isEnable;
                menuItem.Command = RestoreDefaultStyleCommand;
            }
            return popMenu;
        }

        #region 全局

        public event EventHandler ClearCheckedAglin;
        #endregion
        #endregion

        protected List<PDFEditEvent> TextEditEventList;
        public void OnNavigatedTo(NavigationContext navigationContext)
        {

            navigationContext.Parameters.TryGetValue<CPDFViewer>(ParameterNames.PDFViewer, out PDFViewer);
            navigationContext.Parameters.TryGetValue<List<PDFEditEvent>>(ParameterNames.AnnotEvent, out TextEditEventList);
            if (PDFViewer != null)
            {
                if (TextEditEventList != null && TextEditEventList.Count > 0)
                {
                    TextEditEvent = TextEditEventList[0];
                    GetPDFEdit();
                    if (TextEditEventList.Count > 1)
                        IsSelectedEmpty = true;
                    else
                        IsSelectedEmpty = false;

                    if (TextEditEventList.Count == 2)
                    {
                        IsLayoutAlign = true;
                        IsLayoutAvgAlign = false;
                    }
                    else if(TextEditEventList.Count >2)
                    {
                        IsLayoutAlign = true;
                        IsLayoutAvgAlign = true;
                    }
                    else
                    {
                        IsLayoutAlign = false;
                        IsLayoutAvgAlign = false;
                    }
                }

                PDFViewer.PDFEditCommandHandler -= PDFViewer_PDFEditCommandHandler;
                PDFViewer.PDFEditCommandHandler += PDFViewer_PDFEditCommandHandler;
                ChangedValue -= FontMode_ChangedValue;
                ChangedValue += FontMode_ChangedValue;
                IsCanSave = true;
            }
        }

        private void FontMode_ChangedValue(object sender, FontSetModeType e)
        {
           if(sender != null)
            {
                switch(e)
                {
                    case FontSetModeType.PresetFontStyes:
                        if(PresetFontList != null && sender  is string  == true)
                        {
                            var item = PresetFontList.FirstOrDefault(temp => temp.mTag == (string)sender);
                            if (item != null && TextEditEvent != null)
                            {
                                if(TextEditEventList.Count == 1 && IsSelectedEmpty == false)
                                {
                                    TextEditEvent.FontFamily = item.mFontFamily;
                                    TextEditEvent.FontSize = item.mFontSize;
                                    TextEditEvent.FontWeight = item.mFontWeight;
                                    TextEditEvent.FontStyle = item.mFontStyle;
                                    TextEditEvent.UpdatePDFEditByEventArgs();
                                }
                                else
                                {
                                    foreach (var itemlist in TextEditEventList)
                                    {
                                        itemlist.FontFamily = item.mFontFamily;
                                        itemlist.FontSize = item.mFontSize;
                                        itemlist.FontWeight = item.mFontWeight;
                                        itemlist.FontStyle = item.mFontStyle;
                                        itemlist.UpdatePDFEditByEventArgs();
                                    }
                                }
                                
                            }
                        }
                        break;
                    case FontSetModeType.FontFamilys:
                        if(sender is string == true)
                        {
                            TextEditEvent.FontFamily = new FontFamily((string)sender);
                            TextEditEvent.UpdatePDFEditByEventArgs();
                        }
                        break;
                    case FontSetModeType.FontSizes:
                        if (sender is double == true && (double)sender > 0 && TextEditEvent.FontSize > 0)
                        {
                            TextEditEvent.FontSize = (double)sender;
                            TextEditEvent.UpdatePDFEditByEventArgs();
                        }
                        break;
                    case FontSetModeType.FontWeight_Style:
                        UpdateFontWeight_Style();
                        TextEditEvent.FontWeight = FontWeightItem;
                        TextEditEvent.FontStyle = FontStyleItem;
                        TextEditEvent.UpdatePDFEditByEventArgs();
                        break;
                    case FontSetModeType.FontColor:
                        if(sender is Color == true)
                        {
                            var setColor = (Color)sender;
                            var eventColor = TextEditEvent.FontColor;

                            bool isok = eventColor.A != setColor.A || eventColor.B != setColor.B ||
                                 eventColor.G != setColor.G || eventColor.R != setColor.R;

                            if(isok)
                            {
                                TextEditEvent.FontColor = setColor;
                                TextEditEvent.UpdatePDFEditByEventArgs();
                            }
                        }

                        break;

                    case FontSetModeType.TextAlignment:
                        break;
                }
            }
        }

        private void  GetPDFEdit()
        {
            if (TextEditEvent != null && TextEditEventList.Count == 1)
            {
                SelectColor = new SolidColorBrush(TextEditEvent.FontColor);

                GetCurrentFontSize((int)TextEditEvent.FontSize);

                if(TextEditEvent.FontFamily != null)
                    GetCurrentFontFamily(TextEditEvent.FontFamily.ToString(), TextEditEvent.FontFamily.ToString());
                
                GetFontWeights_Style(TextEditEvent.FontStyle, TextEditEvent.FontWeight);
                TextAlign = TextEditEvent.TextAlign;


            }
        }

        public bool IsNavigationTarget(NavigationContext navigationContext){   return true; }

       
        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
            IsCanSave = false;
            TextEditEvent = null;
            IsSelectedEmpty = false;
            ClearCheckedAglin?.Invoke(null, null);
            PDFViewer.PDFEditCommandHandler -= PDFViewer_PDFEditCommandHandler;
            ChangedValue -= FontMode_ChangedValue;
        }

    }
}