using System.Globalization;
using System.IO;
using System.Text.Json;
using System.Text.Json.Nodes;
using System.Text.RegularExpressions;
using System.Windows;
using YY.Admin.Core.Entity;
using YY.Admin.Core.Services;
using YY.Admin.Helper;
using YY.Admin.Services.Service.Print;
namespace YY.Admin.Views.Print;
public partial class PrintPreviewWindow : HandyControl.Controls.Window
{
private readonly string _templateJson;
private readonly PrintTemplate _template;
private readonly IPrintDotService? _printDotService;
private readonly string? _initialPrinterName;
public PrintPreviewWindow(PrintTemplate template, string? templateJson)
: this(template, templateJson, null, null)
{
}
public PrintPreviewWindow(PrintTemplate template, string? templateJson,
IPrintDotService? printDotService, string? selectedPrinterName,
string? initialParamJson = null)
{
InitializeComponent();
_template = template;
_templateJson = templateJson ?? string.Empty;
_printDotService = printDotService;
_initialPrinterName = selectedPrinterName;
WebView.CreationProperties = WebView2UserDataFolder.CreateCreationProperties("PrintPreview");
TbTemplateName.Text = template.TemplateName ?? "（未命名）";
TbTemplateCode.Text = $"编码：{template.TemplateCode} " +
$"尺寸：{template.PaperWidthMm ?? 210}×{template.PaperHeightMm ?? 297} mm " +
$"方向：{template.PaperOrientation ?? "纵向"}";
TbParamJson.Text = !string.IsNullOrWhiteSpace(initialParamJson)
? initialParamJson!
: BuildMockParamJson(_templateJson);
// 没有 PrintDot 服务时禁用打印相关按钮
if (_printDotService == null)
{
BtnPrint.IsEnabled = false;
BtnRefreshPrinters.IsEnabled = false;
PrinterCombo.IsEnabled = false;
}
Loaded += async (_, _) =>
{
await LoadPreviewAsync();
await LoadPrintersAsync(verbose: false);
};
}
private async Task LoadPreviewAsync()
{
try
{
SetStatus("加载中…");
await WebView.EnsureCoreWebView2Async();
if (string.IsNullOrWhiteSpace(_templateJson) || _templateJson == "{}")
{
WebView.NavigateToString(BuildEmptyHtml());
SetStatus("尚未设计模板内容");
return;
}
await RenderCurrentParamJsonAsync();
}
catch (Exception ex)
{
SetStatus($"预览失败：{ex.Message}");
}
}
private static string BuildEmptyHtml() => """
""";
///
/// 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）。
///
private async Task RenderCurrentParamJsonAsync()
{
try
{
SetStatus("渲染中…");
JsonObject dataObj;
var text = TbParamJson.Text?.Trim();
if (string.IsNullOrWhiteSpace(text))
{
dataObj = new JsonObject();
}
else
{
var node = JsonNode.Parse(text);
if (node is not JsonObject obj)
{
WebView.NavigateToString(BuildErrorHtml("参数JSON必须是对象（JSON Object）"));
SetStatus("参数JSON格式错误");
return;
}
dataObj = obj;
}
var html = NativePrintRenderService.RenderToHtml(_templateJson, dataObj);
WebView.NavigateToString(html);
SetStatus(string.Empty);
}
catch (Exception ex)
{
WebView.NavigateToString(BuildErrorHtml(ex.Message));
SetStatus($"渲染失败：{ex.Message}");
}
await Task.CompletedTask;
}
///
/// 根据模板绑定字段生成参数 JSON（便于用户直接编辑并预览）。
/// 与 web 端 nativeMockData.ts 保持一致：识别 mergeColumnKeys 让同组相邻行字段值相同，
/// 以便在预览中触发 rowSpan 合并显示。
///
private static string BuildMockParamJson(string templateJson)
{
if (string.IsNullOrWhiteSpace(templateJson) || templateJson == "{}")
return "{}";
try
{
var root = JsonNode.Parse(templateJson);
var obj = new JsonObject();
var elements = root?["elements"]?.AsArray() ?? new JsonArray();
var fields = new HashSet(StringComparer.OrdinalIgnoreCase);
var rng = new Random();
foreach (var el in elements.OfType())
{
var type = (el["type"]?.ToString() ?? string.Empty).Trim();
if (type is "table" or "detailTable")
{
var source = (el["source"]?.ToString() ?? "mainTable").Trim();
if (!obj.ContainsKey(source))
{
var columns = el["columns"]?.AsArray() ?? new JsonArray();
var colList = columns.OfType().ToList();
// 解析合并字段顺序：根据 mergeColumnKeys 按 column.key 映射到 bindField
var mergeKeys = (el["mergeColumnKeys"]?.AsArray() ?? new JsonArray())
.Select(n => n?.ToString() ?? string.Empty)
.Where(s => !string.IsNullOrEmpty(s))
.ToList();
var strictGrouping = !string.Equals(
el["strictGrouping"]?.ToString() ?? "true", "false",
StringComparison.OrdinalIgnoreCase);
var mergeFieldOrder = mergeKeys
.Select(k => colList.FirstOrDefault(c => string.Equals(c["key"]?.ToString() ?? string.Empty, k, StringComparison.Ordinal)))
.Where(c => c != null)
.Select(c => (c!["bindField"]?.ToString() ?? c!["field"]?.ToString() ?? string.Empty).Trim())
.Where(s => !string.IsNullOrEmpty(s))
.ToList();
var rows = new JsonArray();
JsonObject? prevRow = null;
for (var i = 0; i < 8; i++)
{
var row = new JsonObject();
foreach (var col in colList)
{
var field = (col["bindField"]?.ToString() ?? col["field"]?.ToString() ?? string.Empty).Trim();
if (string.IsNullOrWhiteSpace(field)) continue;
var contentType = (col["contentType"]?.ToString() ?? "text").Trim().ToLowerInvariant();
fields.Add(field);
var mergeIndex = mergeFieldOrder.IndexOf(field);
var enableMerge = mergeIndex >= 0;
if (enableMerge)
{
// 父级合并字段在 strictGrouping 下必须与前一行一致，才允许沿用前一行值
var canFollowPrev = !strictGrouping || mergeIndex == 0 || (prevRow != null &&
mergeFieldOrder.Take(mergeIndex).All(parent =>
(prevRow[parent]?.ToString() ?? string.Empty) == (row[parent]?.ToString() ?? string.Empty)));
if (i > 0 && prevRow != null && canFollowPrev && rng.NextDouble() < 0.5)
{
// 沿用前一行此字段值，从而触发合并
var prevVal = prevRow[field];
row[field] = prevVal != null ? JsonNode.Parse(prevVal.ToJsonString()) : (JsonNode?)$"{field}_合并组1";
}
else
{
// 新合并组：随机 0-3 表示组编号
row[field] = $"{field}_合并组{rng.Next(1, 5)}";
}
continue;
}
row[field] = contentType switch
{
"number" => (i + 1) * 123.45,
"amount" => (i + 1) * 24567.89,
"qrcode" => BuildQrcodeMockValue(field, rng),
"barcode" => BuildBarcodeMockValue(field, rng),
"image" => $"https://picsum.photos/seed/{Uri.EscapeDataString(field + "_" + (i + 1))}/260/120",
_ => $"{field}_示例值_{i + 1}"
};
}
rows.Add(row);
prevRow = row;
}
obj[source] = rows;
}
}
var bind = (el["bindField"]?.ToString() ?? string.Empty).Trim();
if (!string.IsNullOrWhiteSpace(bind))
fields.Add(bind);
// 针对单一元素按 type 提前预填合法 mock 值，避免下面兜底成"字段_示例值"
// （barcode 含中文会导致 Code128 编码失败）。与 web 端 nativeMockData.ts 行为对齐。
if (!string.IsNullOrWhiteSpace(bind) && !obj.ContainsKey(bind))
{
switch (type)
{
case "barcode":
obj[bind] = BuildBarcodeMockValue(bind, rng);
break;
case "qrcode":
obj[bind] = BuildQrcodeMockValue(bind, rng);
break;
case "image":
obj[bind] = $"https://picsum.photos/seed/{Uri.EscapeDataString(bind)}/260/120";
break;
case "date":
obj[bind] = "2026-01-01";
break;
}
}
// freeTable / 其它含 cells 的元素：根据 cell.contentType 预填合法 mock 值
CollectCellsMock(el["cells"], obj, fields, rng);
// 提取 text 中的 {{field}} 占位符（支持内嵌）
var text = el["text"]?.ToString() ?? string.Empty;
foreach (Match m in Regex.Matches(text, @"\{\{\s*([\w\.]+)\s*\}\}"))
{
var key = m.Groups[1].Value.Trim();
if (!string.IsNullOrWhiteSpace(key))
fields.Add(key);
}
}
foreach (var f in fields.OrderBy(x => x, StringComparer.OrdinalIgnoreCase))
{
if (f.Equals("pageNo", StringComparison.OrdinalIgnoreCase) || f.Equals("totalPages", StringComparison.OrdinalIgnoreCase))
continue;
if (!obj.ContainsKey(f))
obj[f] = $"{f}_示例值";
}
return obj.ToJsonString(new JsonSerializerOptions { WriteIndented = true });
}
catch
{
return "{}";
}
}
///
/// 生成一个 ASCII 安全、Code128 可编码的条码 mock 值：BAR + 12 位数字 + 字段名前 6 位转大写字母。
/// 与 web 端 nativeMockData.ts::buildBarcodeValue 同款规则。
///
private static string BuildBarcodeMockValue(string field, Random rng)
{
var digits = rng.NextInt64(100000000000L, 999999999999L).ToString(CultureInfo.InvariantCulture);
var suffix = new string((field ?? string.Empty)
.Where(c => (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9'))
.Take(6).ToArray()).ToUpperInvariant();
if (string.IsNullOrEmpty(suffix)) suffix = "BARCOD";
return $"BAR{digits}{suffix}";
}
/// 生成 QR mock 值：纯 ASCII，便于 QRCoder 编码与人眼区分字段。
private static string BuildQrcodeMockValue(string field, Random rng)
{
var safe = new string((field ?? string.Empty)
.Where(c => (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || c == '_')
.ToArray());
if (string.IsNullOrEmpty(safe)) safe = "QR";
return $"QR_{safe}_{rng.Next(100000, 999999)}";
}
///
/// 递归扫描 cells 节点（freeTable、嵌套结构），按每个 cell 的 contentType 提前预填合法 mock 值。
/// 不识别的 cell 继续走原来的 fields 兜底流程。
///
private static void CollectCellsMock(JsonNode? node, JsonObject obj, ISet fields, Random rng)
{
if (node == null) return;
if (node is JsonObject o)
{
var bind = (o["bindField"]?.ToString() ?? string.Empty).Trim();
if (!string.IsNullOrWhiteSpace(bind))
{
fields.Add(bind);
if (!obj.ContainsKey(bind))
{
var ct = (o["contentType"]?.ToString() ?? "text").Trim().ToLowerInvariant();
switch (ct)
{
case "barcode":
obj[bind] = BuildBarcodeMockValue(bind, rng);
break;
case "qrcode":
obj[bind] = BuildQrcodeMockValue(bind, rng);
break;
case "image":
obj[bind] = $"https://picsum.photos/seed/{Uri.EscapeDataString(bind)}/260/120";
break;
}
}
}
foreach (var kv in o)
CollectCellsMock(kv.Value, obj, fields, rng);
return;
}
if (node is JsonArray arr)
{
foreach (var it in arr)
CollectCellsMock(it, obj, fields, rng);
}
}
private static void CollectBindFields(JsonNode? node, ISet fields)
{
if (node == null) return;
if (node is JsonObject o)
{
if (o.TryGetPropertyValue("bindField", out var bindNode))
{
var bind = bindNode?.ToString()?.Trim();
if (!string.IsNullOrWhiteSpace(bind))
fields.Add(bind);
}
foreach (var kv in o)
CollectBindFields(kv.Value, fields);
return;
}
if (node is JsonArray arr)
{
foreach (var it in arr)
CollectBindFields(it, fields);
}
}
private static string BuildErrorHtml(string message)
{
var esc = message.Replace("&", "&").Replace("<", "<").Replace(">", ">");
return ""
+ "
⚠️
"
+ "
渲染失败：" + esc + "
"
+ "