241 lines
9.1 KiB
C#
241 lines
9.1 KiB
C#
using System.Text.Json;
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using System.Text.Json.Nodes;
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using System.Text.RegularExpressions;
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using System.Windows;
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using YY.Admin.Core.Entity;
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using YY.Admin.Services.Service.Print;
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namespace YY.Admin.Views.Print;
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public partial class PrintPreviewWindow : HandyControl.Controls.Window
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{
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private readonly string _templateJson;
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public PrintPreviewWindow(PrintTemplate template, string? templateJson)
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{
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InitializeComponent();
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_templateJson = templateJson ?? string.Empty;
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TbTemplateName.Text = template.TemplateName ?? "（未命名）";
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TbTemplateCode.Text = $"编码：{template.TemplateCode} " +
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$"尺寸：{template.PaperWidthMm ?? 210}×{template.PaperHeightMm ?? 297} mm " +
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$"方向：{template.PaperOrientation ?? "纵向"}";
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TbParamJson.Text = BuildMockParamJson(_templateJson);
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Loaded += async (_, _) => await LoadPreviewAsync();
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}
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private async Task LoadPreviewAsync()
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{
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try
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{
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TbStatus.Text = "加载中…";
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await WebView.EnsureCoreWebView2Async();
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if (string.IsNullOrWhiteSpace(_templateJson) || _templateJson == "{}")
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{
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WebView.NavigateToString(BuildEmptyHtml());
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TbStatus.Text = "尚未设计模板内容";
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return;
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}
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await RenderCurrentParamJsonAsync();
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}
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catch (Exception ex)
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{
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TbStatus.Text = $"预览失败：{ex.Message}";
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}
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}
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private static string BuildEmptyHtml() => """
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<!DOCTYPE html>
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<html><head><meta charset="utf-8"/>
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<style>
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body { margin:0; background:#525659; display:flex;
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align-items:center; justify-content:center; height:100vh;
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font-family:"Microsoft YaHei",Arial,sans-serif; }
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.card { background:#fff; border-radius:8px; padding:48px 64px;
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text-align:center; box-shadow:0 6px 24px rgba(0,0,0,.4); }
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.icon { font-size:48px; color:#ccc; margin-bottom:16px; }
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.tip { font-size:15px; color:#888; }
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</style></head>
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<body>
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<div class="card">
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<div class="icon">📄</div>
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<div class="tip">该模板尚未设计内容</div>
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</div>
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</body></html>
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""";
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/// <summary>
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/// 左侧参数 JSON 重新渲染预览（与后端预览一致：用参数 JSON 驱动模板绑定字段）。
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/// </summary>
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private async Task RenderCurrentParamJsonAsync()
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{
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try
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{
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TbStatus.Text = "渲染中…";
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JsonObject dataObj;
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var text = TbParamJson.Text?.Trim();
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if (string.IsNullOrWhiteSpace(text))
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{
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dataObj = new JsonObject();
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}
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else
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{
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var node = JsonNode.Parse(text);
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if (node is not JsonObject obj)
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{
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WebView.NavigateToString(BuildErrorHtml("参数JSON必须是对象（JSON Object）"));
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TbStatus.Text = "参数JSON格式错误";
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return;
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}
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dataObj = obj;
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}
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var html = NativePrintRenderService.RenderToHtml(_templateJson, dataObj);
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WebView.NavigateToString(html);
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TbStatus.Text = string.Empty;
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}
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catch (Exception ex)
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{
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WebView.NavigateToString(BuildErrorHtml(ex.Message));
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TbStatus.Text = $"渲染失败：{ex.Message}";
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}
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await Task.CompletedTask;
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}
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/// <summary>
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/// 根据模板绑定字段生成参数 JSON（便于用户直接编辑并预览）。
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/// </summary>
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private static string BuildMockParamJson(string templateJson)
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{
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if (string.IsNullOrWhiteSpace(templateJson) || templateJson == "{}")
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return "{}";
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try
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{
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var root = JsonNode.Parse(templateJson);
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var obj = new JsonObject();
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var elements = root?["elements"]?.AsArray() ?? new JsonArray();
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var fields = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
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foreach (var el in elements.OfType<JsonObject>())
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{
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var type = (el["type"]?.ToString() ?? string.Empty).Trim();
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if (type is "table" or "detailTable")
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{
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var source = (el["source"]?.ToString() ?? "mainTable").Trim();
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if (!obj.ContainsKey(source))
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{
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var rows = new JsonArray();
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var columns = el["columns"]?.AsArray() ?? new JsonArray();
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for (var i = 1; i <= 8; i++)
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{
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var row = new JsonObject();
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foreach (var col in columns.OfType<JsonObject>())
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{
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var field = (col["bindField"]?.ToString() ?? col["field"]?.ToString() ?? string.Empty).Trim();
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if (string.IsNullOrWhiteSpace(field)) continue;
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var contentType = (col["contentType"]?.ToString() ?? "text").Trim().ToLowerInvariant();
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row[field] = contentType switch
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{
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"number" => i * 123.45,
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"amount" => i * 24567.89,
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"qrcode" => $"QR_{field}_{i}",
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"barcode" => $"BAR_{field}_{i}",
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"image" => $"https://picsum.photos/seed/{Uri.EscapeDataString(field + "_" + i)}/260/120",
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_ => $"{field}_示例值_{i}"
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};
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fields.Add(field);
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}
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rows.Add(row);
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}
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obj[source] = rows;
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}
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}
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var bind = (el["bindField"]?.ToString() ?? string.Empty).Trim();
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if (!string.IsNullOrWhiteSpace(bind))
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fields.Add(bind);
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// 提取 text 中的 {{field}} 占位符（支持内嵌）
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var text = el["text"]?.ToString() ?? string.Empty;
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foreach (Match m in Regex.Matches(text, @"\{\{\s*([\w\.]+)\s*\}\}"))
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{
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var key = m.Groups[1].Value.Trim();
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if (!string.IsNullOrWhiteSpace(key))
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fields.Add(key);
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}
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CollectBindFields(el["cells"], fields);
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}
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foreach (var f in fields.OrderBy(x => x, StringComparer.OrdinalIgnoreCase))
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{
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if (f.Equals("pageNo", StringComparison.OrdinalIgnoreCase) || f.Equals("totalPages", StringComparison.OrdinalIgnoreCase))
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continue;
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if (!obj.ContainsKey(f))
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obj[f] = $"{f}_示例值";
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}
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return obj.ToJsonString(new JsonSerializerOptions { WriteIndented = true });
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}
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catch
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{
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return "{}";
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}
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}
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private static void CollectBindFields(JsonNode? node, ISet<string> fields)
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{
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if (node == null) return;
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if (node is JsonObject o)
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{
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if (o.TryGetPropertyValue("bindField", out var bindNode))
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{
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var bind = bindNode?.ToString()?.Trim();
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if (!string.IsNullOrWhiteSpace(bind))
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fields.Add(bind);
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}
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foreach (var kv in o)
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CollectBindFields(kv.Value, fields);
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return;
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}
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if (node is JsonArray arr)
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{
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foreach (var it in arr)
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CollectBindFields(it, fields);
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}
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}
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private static string BuildErrorHtml(string message)
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{
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var esc = message.Replace("&", "&").Replace("<", "<").Replace(">", ">");
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return "<html><head><meta charset=\"utf-8\"/><style>"
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+ "body{margin:0;background:#525659;display:flex;align-items:center;"
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+ "justify-content:center;height:100vh;font-family:'Microsoft YaHei',Arial,sans-serif;}"
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+ ".card{background:#fff;border-radius:8px;padding:32px 48px;text-align:center;"
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+ "box-shadow:0 6px 24px rgba(0,0,0,.4);max-width:560px;}"
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+ "</style></head><body><div class=\"card\">"
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+ "<div style=\"font-size:40px;margin-bottom:12px\">⚠️</div>"
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+ "<div style=\"font-size:13px;color:#e74c3c;word-break:break-all;\">渲染失败：" + esc + "</div>"
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+ "</div></body></html>";
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}
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private async void RenderByParamJson_Click(object sender, RoutedEventArgs e)
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{
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await RenderCurrentParamJsonAsync();
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}
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private async void GenerateMockJson_Click(object sender, RoutedEventArgs e)
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{
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TbParamJson.Text = BuildMockParamJson(_templateJson);
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await RenderCurrentParamJsonAsync();
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}
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private void CloseButton_Click(object sender, RoutedEventArgs e) => Close();
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}
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