feat:实现波形预览的功能

src/panels/ICHelperPanel.ts

@@ -8,6 +8,7 @@ import {
   handleRenameFile,
   handleReplaceInFile
 } from "../utils/messageHandler";
+import { VCDViewerPanel } from "./VCDViewerPanel";
 
 /**
  * 创建并显示 IC 助手面板
@@ -61,9 +62,190 @@ export function showICHelperPanel(context: vscode.ExtensionContext) {
         case "showInfo":
           vscode.window.showInformationMessage(message.text);
           break;
+        case "openWaveformViewer":
+          // 打开波形查看器
+          if (message.vcdFilePath) {
+            VCDViewerPanel.createOrShow(context.extensionUri, message.vcdFilePath);
+          }
+          break;
+        case "getVCDInfo":
+          // 获取 VCD 文件信息
+          if (message.vcdFilePath && message.containerId) {
+            getVCDFileInfo(panel, message.vcdFilePath, message.containerId);
+          }
+          break;
       }
     },
     undefined,
     context.subscriptions
   );
 }
+
+/**
+ * 获取 VCD 文件信息
+ */
+async function getVCDFileInfo(
+  panel: vscode.WebviewPanel,
+  vcdFilePath: string,
+  containerId: string
+) {
+  try {
+    const fs = require('fs');
+    const path = require('path');
+
+    // 检查文件是否存在
+    if (!fs.existsSync(vcdFilePath)) {
+      panel.webview.postMessage({
+        command: "vcdInfo",
+        containerId: containerId,
+        vcdInfo: {
+          signalCount: 'N/A',
+          timeRange: 'N/A',
+          fileSize: 'N/A',
+          error: '文件不存在'
+        }
+      });
+      return;
+    }
+
+    // 获取文件大小
+    const stats = fs.statSync(vcdFilePath);
+    const fileSizeKB = stats.size / 1024;
+    const fileSize = fileSizeKB < 1024
+      ? `${fileSizeKB.toFixed(2)} KB`
+      : `${(fileSizeKB / 1024).toFixed(2)} MB`;
+
+    // 读取 VCD 文件内容
+    const content = fs.readFileSync(vcdFilePath, 'utf-8');
+
+    // 解析信号数量
+    const varMatches = content.match(/\$var/g);
+    const signalCount = varMatches ? varMatches.length : 0;
+
+    // 解析时间范围
+    let timeRange = 'N/A';
+    const timeMatch = content.match(/#(\d+)/g);
+    if (timeMatch && timeMatch.length > 0) {
+      const times = timeMatch.map((t: string) => parseInt(t.substring(1)));
+      const minTime = Math.min(...times);
+      const maxTime = Math.max(...times);
+      timeRange = `${minTime} - ${maxTime}`;
+    }
+
+    // 解析前几个信号的真实数据
+    const signals = parseVCDSignals(content, 3); // 只解析前3个信号
+
+    // 发送信息回前端
+    panel.webview.postMessage({
+      command: "vcdInfo",
+      containerId: containerId,
+      vcdInfo: {
+        signalCount: signalCount.toString(),
+        timeRange: timeRange,
+        fileSize: fileSize,
+        signals: signals // 添加真实信号数据
+      }
+    });
+
+  } catch (error) {
+    console.error('获取 VCD 文件信息失败:', error);
+    panel.webview.postMessage({
+      command: "vcdInfo",
+      containerId: containerId,
+      vcdInfo: {
+        signalCount: 'N/A',
+        timeRange: 'N/A',
+        fileSize: 'N/A',
+        error: error instanceof Error ? error.message : '未知错误'
+      }
+    });
+  }
+}
+
+/**
+ * 解析 VCD 文件中的信号数据
+ */
+function parseVCDSignals(content: string, maxSignals: number = 3) {
+  const signals: Array<{
+    name: string;
+    identifier: string;
+    width: number;
+    values: Array<{ time: number; value: string }>;
+  }> = [];
+
+  try {
+    // 1. 解析信号定义部分
+    const varRegex = /\$var\s+(\w+)\s+(\d+)\s+(\S+)\s+([^\$]+?)\s+\$end/g;
+    let match;
+    const signalDefs: Array<{ name: string; identifier: string; width: number }> = [];
+
+    while ((match = varRegex.exec(content)) !== null && signalDefs.length < maxSignals) {
+      const width = parseInt(match[2]);
+      const identifier = match[3];
+      const name = match[4].trim();
+
+      signalDefs.push({ name, identifier, width });
+    }
+
+    // 2. 找到数据变化部分的起始位置
+    const dumpvarsIndex = content.indexOf('$dumpvars');
+    if (dumpvarsIndex === -1) {
+      return signals;
+    }
+
+    const dataSection = content.substring(dumpvarsIndex);
+
+    // 3. 解析每个信号的值变化
+    for (const signalDef of signalDefs) {
+      const values: Array<{ time: number; value: string }> = [];
+      let currentTime = 0;
+
+      // 分行处理数据
+      const lines = dataSection.split('\n');
+
+      for (const line of lines) {
+        const trimmedLine = line.trim();
+
+        // 解析时间戳
+        if (trimmedLine.startsWith('#')) {
+          currentTime = parseInt(trimmedLine.substring(1));
+          continue;
+        }
+
+        // 解析信号值变化
+        // 格式1: 单比特信号 "0!" 或 "1!"
+        // 格式2: 多比特信号 "b1010 !"
+        if (signalDef.width === 1) {
+          // 单比特信号
+          const singleBitMatch = trimmedLine.match(new RegExp(`^([01xz])${signalDef.identifier}$`));
+          if (singleBitMatch) {
+            values.push({ time: currentTime, value: singleBitMatch[1] });
+          }
+        } else {
+          // 多比特信号
+          const multiBitMatch = trimmedLine.match(new RegExp(`^b([01xz]+)\\s+${signalDef.identifier}$`));
+          if (multiBitMatch) {
+            values.push({ time: currentTime, value: multiBitMatch[1] });
+          }
+        }
+
+        // 限制采样点数量，避免数据过多
+        if (values.length >= 50) {
+          break;
+        }
+      }
+
+      signals.push({
+        name: signalDef.name,
+        identifier: signalDef.identifier,
+        width: signalDef.width,
+        values: values
+      });
+    }
+
+  } catch (error) {
+    console.error('解析 VCD 信号数据失败:', error);
+  }
+
+  return signals;
+}