ctbjrj/cadbt/cadbt/CadBridge.cs

// ============================================================
//  CadBridge:WinForms 宿主与网页 CAD(CAD-Viewer)之间的互操作桥
//  · 下行(C#→网页):PostMessage 发 startPick/zoomToHandle/deleteHandles/clearHighlight
//  · 上行(网页→C#):WebMessageReceived 收 paPicked/entityErased/paExited
//  · 扒图结果与实体删除事件以 C# 事件形式提供给 Form3(替代 AutoCAD 版
//    的 PaTextSelector.BatchTextsPicked 与 Database.ObjectErased)
// ============================================================
using System;
using System.Collections.Generic;
using System.Web.Script.Serialization;
using Microsoft.Web.WebView2.Core;
using Microsoft.Web.WebView2.WinForms;

namespace cadbt
{
    public static class CadBridge
    {
        private static WebView2 _wv;
        private static readonly JavaScriptSerializer _json = new JavaScriptSerializer();

        /// <summary>网页 CAD 是否已挂载(WebView2 已附加)。</summary>
        public static bool IsViewerReady
        {
            get { return _wv != null && _wv.CoreWebView2 != null; }
        }

        /// <summary>网页 CAD 中实体被删除(句柄十六进制字符串)。</summary>
        public static event Action<string> EntityErased;

        /// <summary>网页 CAD 扒图完成一批(图号/箱号/元件)。</summary>
        public static event Action<MyApp.PaMode, List<MyApp.PaTextResult>> PaPicked;

        /// <summary>用户按 ESC 退出网页扒图连续模式。</summary>
        public static event Action PaExited;

        /// <summary>用户按 F1(焦点在网页或宿主时都触发)——元件两两合并。</summary>
        public static event Action F1Requested;

        /// <summary>用户按 F2——元件三个一组合并。</summary>
        public static event Action F2Requested;

        /// <summary>用户按 F3——元件四个一组合并。</summary>
        public static event Action F3Requested;

        /// <summary>触发 F1 请求(消息过滤器等宿主侧来源调用)。</summary>
        public static void RaiseF1()
        {
            if (F1Requested != null) F1Requested();
        }

        /// <summary>触发 F2 请求(消息过滤器等宿主侧来源调用)。</summary>
        public static void RaiseF2()
        {
            if (F2Requested != null) F2Requested();
        }

        /// <summary>触发 F3 请求(消息过滤器等宿主侧来源调用)。</summary>
        public static void RaiseF3()
        {
            if (F3Requested != null) F3Requested();
        }

        /// <summary>把 WebView2 挂到桥上(在控件初始化完成后调用一次)。</summary>
        public static void Attach(WebView2 wv)
        {
            if (_wv == wv) return;
            if (_wv != null) _wv.WebMessageReceived -= OnMessage;
            _wv = wv;
            if (_wv != null) _wv.WebMessageReceived += OnMessage;
        }

        private static void OnMessage(object sender, CoreWebView2WebMessageReceivedEventArgs e)
        {
            try
            {
                if (e.TryGetWebMessageAsString() != null) return; // 只处理 JSON 消息
            }
            catch { }
            try
            {
                var msg = _json.Deserialize<Dictionary<string, object>>(e.WebMessageAsJson);
                if (msg == null || !msg.ContainsKey("type")) return;
                string type = msg["type"] as string;

                if (type == "paPicked")
                {
                    int mode = Convert.ToInt32(msg["mode"]);
                    var results = new List<MyApp.PaTextResult>();
                    var arr = msg["results"] as System.Collections.ArrayList;
                    if (arr != null)
                    {
                        foreach (Dictionary<string, object> item in arr)
                        {
                            results.Add(new MyApp.PaTextResult
                            {
                                Text = Convert.ToString(item["text"]) ?? "",
                                FrameHandle = Convert.ToString(item["frameHandle"]) ?? "",
                                TextHandle = Convert.ToString(item["textHandle"]) ?? ""
                            });
                        }
                    }
                    // WebMessageReceived 在 UI 线程触发,可直接调用 Form3
                    if (PaPicked != null)
                        PaPicked((MyApp.PaMode)mode, results);
                }
                else if (type == "entityErased")
                {
                    string handle = Convert.ToString(msg["handle"]);
                    if (!string.IsNullOrWhiteSpace(handle) && EntityErased != null)
                        EntityErased(handle);
                }
                else if (type == "paError")
                {
                    string errMsg = Convert.ToString(msg["message"]);
                    System.Windows.Forms.MessageBox.Show(
                        "网页 CAD 返回错误:\n" + errMsg,
                        "扒数据", System.Windows.Forms.MessageBoxButtons.OK,
                        System.Windows.Forms.MessageBoxIcon.Warning);
                }
                else if (type == "f1")
                {
                    if (F1Requested != null) F1Requested();
                }
                else if (type == "f2")
                {
                    if (F2Requested != null) F2Requested();
                }
                else if (type == "f3")
                {
                    if (F3Requested != null) F3Requested();
                }
                else if (type == "paExited")
                {
                    if (PaExited != null) PaExited();
                }
            }
            catch (Exception)
            {
                // 消息格式异常直接忽略,不影响宿主
            }
        }

        private static void Post(object msg)
        {
            if (!IsViewerReady) return;
            try
            {
                _wv.CoreWebView2.PostWebMessageAsJson(_json.Serialize(msg));
            }
            catch { }
        }

        /// <summary>
        /// 发送扒图命令。接受原 CAD 命令名(CADPATU/CADPAXH/CADPAYJ/CADPACL)
        /// 或网页命令名(patu/paxh/payj)。
        /// </summary>
        public static void SendPaCommand(string cmd)
        {
            if (string.IsNullOrWhiteSpace(cmd)) return;
            string c = cmd.Trim().ToUpperInvariant();
            int mode = 0;
            if (c == "CADPATU" || c == "PATU") mode = 0;
            else if (c == "CADPAXH" || c == "PAXH") mode = 1;
            else if (c == "CADPAYJ" || c == "PAYJ") mode = 2;
            else if (c == "CADPACL" || c == "PACL")
            {
                ClearHighlight();
                return;
            }
            else return;
            Post(new { type = "startPick", mode = mode });
        }

        /// <summary>缩放居中到指定 Handle 的实体并高亮(点击表格行定位框)。</summary>
        public static void ZoomToFrameHandle(string handle)
        {
            if (string.IsNullOrWhiteSpace(handle)) return;
            Post(new { type = "zoomToHandle", handle = handle });
        }

        /// <summary>批量删除指定 Handle 的实体(删表格行联动删框)。</summary>
        public static void DeleteFramesByHandles(IEnumerable<string> handles)
        {
            if (handles == null) return;
            var list = new List<string>();
            foreach (string h in handles)
                if (!string.IsNullOrWhiteSpace(h)) list.Add(h);
            if (list.Count == 0) return;
            Post(new { type = "deleteHandles", handles = list });
        }

        /// <summary>
        /// 合并蒙版:保留 keep 句柄的蒙版并扩大到所有 removes 蒙版的并集,
        /// 被合并行的蒙版从网页 CAD 移除(元件合并时蒙版同步合并)。
        /// </summary>
        public static void MergeMasks(string keep, System.Collections.Generic.IEnumerable<string> removes)
        {
            if (string.IsNullOrWhiteSpace(keep)) return;
            var list = new List<string>();
            if (removes != null)
                foreach (string h in removes)
                    if (!string.IsNullOrWhiteSpace(h) && h != keep) list.Add(h);
            if (list.Count == 0) return;
            Post(new { type = "mergeMasks", keep = keep, removes = list });
        }

        /// <summary>清除网页 CAD 中的所有高亮。</summary>
        public static void ClearHighlight()
        {
            Post(new { type = "clearHighlight" });
        }
    }
}