Add the compare-interface

This module will behave like the interface.ts module and handle
interactions between the compare webview and the extension.

extensions/ql-vscode/package.json

@@ -314,6 +314,10 @@
         "command": "codeQLQueryHistory.setLabel",
         "title": "Set Label"
       },
+      {
+        "command": "codeQLQueryHistory.compareWith",
+        "title": "Compare with..."
+      },
       {
         "command": "codeQL.restartQueryServer",
         "title": "CodeQL: Restart Query Server"
@@ -401,6 +405,11 @@
           "group": "9_qlCommands",
           "when": "view == codeQLQueryHistory"
         },
+        {
+          "command": "codeQLQueryHistory.compareWith",
+          "group": "9_qlCommands",
+          "when": "view == codeQLQueryHistory"
+        },
         {
           "command": "codeQLQueryHistory.showQueryLog",
           "group": "9_qlCommands",
@@ -523,6 +532,10 @@
         {
           "command": "codeQLQueryHistory.setLabel",
           "when": "false"
+        },
+        {
+          "command": "codeQLQueryHistory.compareWith",
+          "when": "false"
         }
       ],
       "editor/context": [

extensions/ql-vscode/src/compare/compare-interface.ts

@@ -0,0 +1,85 @@
+import { DisposableObject } from "semmle-vscode-utils";
+import { WebviewPanel, ExtensionContext, window as Window, ViewColumn, Uri } from "vscode";
+import * as path from 'path';
+
+import { tmpDir } from "../run-queries";
+import { CompletedQuery } from "../query-results";
+import { CompareViewMessage } from "../interface-types";
+import { Logger } from "../logging";
+import { CodeQLCliServer } from "../cli";
+import { DatabaseManager } from "../databases";
+import { getHtmlForWebview, WebviewReveal } from "../webview-utils";
+import { showAndLogErrorMessage } from "../helpers";
+
+interface ComparePair {
+  from: CompletedQuery;
+  to: CompletedQuery;
+}
+
+export class CompareInterfaceManager extends DisposableObject {
+  private comparePair: ComparePair | undefined;
+  private panel: WebviewPanel | undefined;
+
+  constructor(
+    public ctx: ExtensionContext,
+    public databaseManager: DatabaseManager,
+    public cliServer: CodeQLCliServer,
+    public logger: Logger
+  ) {
+    super();
+  }
+
+  showResults(from: CompletedQuery, to: CompletedQuery, forceReveal = WebviewReveal.NotForced) {
+    this.comparePair = { from, to };
+    if (forceReveal === WebviewReveal.Forced) {
+      this.getPanel().reveal(undefined, true);
+    }
+  }
+
+  getPanel(): WebviewPanel {
+    if (this.panel == undefined) {
+      const { ctx } = this;
+      const panel = (this.panel = Window.createWebviewPanel(
+        "compareView", // internal name
+        "Compare CodeQL Query Results", // user-visible name
+        { viewColumn: ViewColumn.Beside, preserveFocus: true },
+        {
+          enableScripts: true,
+          enableFindWidget: true,
+          retainContextWhenHidden: true,
+          localResourceRoots: [
+            Uri.file(tmpDir.name),
+            Uri.file(path.join(this.ctx.extensionPath, "out")),
+          ],
+        }
+      ));
+      this.panel.onDidDispose(
+        () => this.panel = undefined,
+        null,
+        ctx.subscriptions
+      );
+
+      const scriptPathOnDisk = Uri.file(
+        ctx.asAbsolutePath("out/compareView.js")
+      );
+
+      const stylesheetPathOnDisk = Uri.file(
+        ctx.asAbsolutePath("out/compareView.css")
+      );
+
+      panel.webview.html = getHtmlForWebview(panel.webview, scriptPathOnDisk, stylesheetPathOnDisk);
+      panel.webview.onDidReceiveMessage(
+        async (e) => this.handleMsgFromView(e),
+        undefined,
+        ctx.subscriptions
+      );
+    }
+    return this.panel;
+  }
+
+  private async handleMsgFromView(msg: CompareViewMessage): Promise<void> {
+    /** TODO */
+    showAndLogErrorMessage(JSON.stringify(msg));
+    showAndLogErrorMessage(JSON.stringify(this.comparePair));
+  }
+}

extensions/ql-vscode/src/interface-types.ts

@@ -170,3 +170,9 @@ interface ChangeInterpretedResultsSortMsg {
    */
   sortState?: InterpretedResultsSortState;
 }
+
+export interface CompareViewMessage {
+  t: 'change-compare';
+  newResultSetName: string;
+  // TODO do we need to include the ids of the queries
+}

extensions/ql-vscode/src/query-history.ts

@@ -135,10 +135,15 @@ class HistoryTreeDataProvider implements vscode.TreeDataProvider<CompletedQuery>
       }
       this.refresh();
     }
+
+  }
+
+  get allHistory(): CompletedQuery[] {
+    return this.history;
   }
 
   refresh() {
-    this._onDidChangeTreeData.fire();
+    this._onDidChangeTreeData.fire(undefined);
   }
 }
 
@@ -152,7 +157,6 @@ export class QueryHistoryManager {
   treeDataProvider: HistoryTreeDataProvider;
   ctx: ExtensionContext;
   treeView: vscode.TreeView<CompletedQuery>;
-  selectedCallback: ((item: CompletedQuery) => void) | undefined;
   lastItemClick: { time: Date; item: CompletedQuery } | undefined;
 
   async invokeCallbackOn(queryHistoryItem: CompletedQuery) {
@@ -200,6 +204,22 @@ export class QueryHistoryManager {
     }
   }
 
+  async handleCompareWith(query: CompletedQuery) {
+    const dbName = query.database.name;
+    const comparableQueryLabels = this.treeDataProvider.allHistory
+      .filter((otherQuery) => otherQuery !== query && otherQuery.didRunSuccessfully && otherQuery.database.name === dbName)
+      .map(otherQuery => ({
+        label: otherQuery.toString(),
+        description: otherQuery.databaseName,
+        detail: otherQuery.statusString,
+        query: otherQuery
+      }));
+    const choice = await vscode.window.showQuickPick(comparableQueryLabels);
+    if (choice) {
+      this.doCompareCallback(query, choice.query);
+    }
+  }
+
   async handleItemClicked(queryHistoryItem: CompletedQuery) {
     this.treeDataProvider.setCurrentItem(queryHistoryItem);
 
@@ -277,10 +297,10 @@ export class QueryHistoryManager {
   constructor(
     ctx: ExtensionContext,
     private queryHistoryConfigListener: QueryHistoryConfig,
-    selectedCallback?: (item: CompletedQuery) => Promise<void>
+    private selectedCallback: (item: CompletedQuery) => Promise<void>,
+    private doCompareCallback: (from: CompletedQuery, to: CompletedQuery) => Promise<void>,
   ) {
     this.ctx = ctx;
-    this.selectedCallback = selectedCallback;
     const treeDataProvider = this.treeDataProvider = new HistoryTreeDataProvider(ctx);
     this.treeView = Window.createTreeView('codeQLQueryHistory', { treeDataProvider });
     // Lazily update the tree view selection due to limitations of TreeView API (see
@@ -296,6 +316,7 @@ export class QueryHistoryManager {
     ctx.subscriptions.push(vscode.commands.registerCommand('codeQLQueryHistory.openQuery', this.handleOpenQuery));
     ctx.subscriptions.push(vscode.commands.registerCommand('codeQLQueryHistory.removeHistoryItem', this.handleRemoveHistoryItem.bind(this)));
     ctx.subscriptions.push(vscode.commands.registerCommand('codeQLQueryHistory.setLabel', this.handleSetLabel.bind(this)));
+    ctx.subscriptions.push(vscode.commands.registerCommand('codeQLQueryHistory.compareWith', this.handleCompareWith.bind(this)));
     ctx.subscriptions.push(vscode.commands.registerCommand('codeQLQueryHistory.showQueryLog', this.handleShowQueryLog.bind(this)));
     ctx.subscriptions.push(vscode.commands.registerCommand('codeQLQueryHistory.showQueryText', this.handleShowQueryText.bind(this)));
     ctx.subscriptions.push(vscode.commands.registerCommand('codeQLQueryHistory.viewSarif', this.handleViewSarif.bind(this)));

extensions/ql-vscode/src/vscode-tests/no-workspace/webview-uri.test.ts

@@ -1,8 +1,8 @@
-import { expect } from 'chai';
-import * as path from 'path';
-import * as tmp from 'tmp';
-import { window, ViewColumn, Uri } from 'vscode';
-import { fileUriToWebviewUri, webviewUriToFileUri } from '../../interface';
+import { expect } from "chai";
+import * as path from "path";
+import * as tmp from "tmp";
+import { window, ViewColumn, Uri } from "vscode";
+import { fileUriToWebviewUri, webviewUriToFileUri } from '../../webview-utils';
 
 describe('webview uri conversion', function() {
   const fileSuffix = '.bqrs';

extensions/ql-vscode/src/webview-utils.ts

@@ -1,5 +1,17 @@
 import * as crypto from "crypto";
-import { Uri, Location, Range, WebviewPanel, Webview, window as Window, workspace, ViewColumn, Selection, TextEditorRevealType, ThemeColor } from "vscode";
+import {
+  Uri,
+  Location,
+  Range,
+  WebviewPanel,
+  Webview,
+  workspace,
+  window as Window,
+  ViewColumn,
+  Selection,
+  TextEditorRevealType,
+  ThemeColor,
+} from "vscode";
 import {
   FivePartLocation,
   LocationStyle,
@@ -136,25 +148,6 @@ export function getHtmlForWebview(
 </html>`;
 }
 
-
-const findMatchBackground = new ThemeColor("editor.findMatchBackground");
-const findRangeHighlightBackground = new ThemeColor(
-  "editor.findRangeHighlightBackground"
-);
-
-export const shownLocationDecoration = Window.createTextEditorDecorationType(
-  {
-    backgroundColor: findMatchBackground,
-  }
-);
-
-export const shownLocationLineDecoration = Window.createTextEditorDecorationType(
-  {
-    backgroundColor: findRangeHighlightBackground,
-    isWholeLine: true,
-  }
-);
-
 export async function showLocation(
   loc: ResolvableLocationValue,
   databaseItem: DatabaseItem
@@ -188,3 +181,19 @@ export async function showLocation(
     editor.setDecorations(shownLocationLineDecoration, [range]);
   }
 }
+
+const findMatchBackground = new ThemeColor("editor.findMatchBackground");
+const findRangeHighlightBackground = new ThemeColor(
+  "editor.findRangeHighlightBackground"
+);
+
+export const shownLocationDecoration = Window.createTextEditorDecorationType({
+  backgroundColor: findMatchBackground,
+});
+
+export const shownLocationLineDecoration = Window.createTextEditorDecorationType(
+  {
+    backgroundColor: findRangeHighlightBackground,
+    isWholeLine: true,
+  }
+);