Added basic code.

.gitignore

@@ -22,3 +22,4 @@ CHANGELOG.md
 
 # Demo tutorial is populated during the build.
 lib/esbonio-extensions/esbonio/tutorial_demo
+code/.python-version

code/package.json

@@ -75,6 +75,12 @@
                 "icon": "$(open-preview)",
                 "category": "Esbonio"
             },
+            {
+                "command": "esbonio.preview.showSource",
+                "title": "Show Source",
+                "icon": "$(go-to-file)",
+                "category": "Esbonio"
+            },
             {
                 "command": "esbonio.server.restart",
                 "title": "Restart Language Server",
@@ -327,6 +333,11 @@
                     "alt": "esbonio.preview.open",
                     "group": "navigation",
                     "when": "resourceLangId == restructuredtext"
+                },
+                {
+                    "command": "esbonio.preview.showSource",
+                    "group": "navigation",
+                    "when": "restructuredtextPreviewFocus"
                 }
             ]
         },

code/src/common/constants.ts

@@ -5,6 +5,7 @@ export namespace Server {
 export namespace Commands {
   export const OPEN_PREVIEW = "esbonio.preview.open"
   export const OPEN_PREVIEW_TO_SIDE = "esbonio.preview.openSide"
+  export const SHOW_SOURCE = "esbonio.preview.showSource"
   export const PREVIEW_FILE = "esbonio.server.previewFile"
 
   export const RESTART_SERVER = "esbonio.server.restart"

code/src/node/preview.ts

@@ -1,7 +1,7 @@
 import * as vscode from 'vscode'
 import { OutputChannelLogger } from '../common/log'
 import { EsbonioClient } from './client'
-import { Commands, Events, Notifications, Server } from '../common/constants'
+import { Commands, Events, Notifications } from '../common/constants'
 
 interface PreviewFileParams {
   uri: string
@@ -14,6 +14,8 @@ interface PreviewFileResult {
 
 export class PreviewManager {
 
+  private static readonly rstPreviewActiveContextKey =
+        'restructuredtextPreviewFocus';
   private panel?: vscode.WebviewPanel
 
   // The uri of the document currently shown in the preview pane
@@ -30,6 +32,9 @@ export class PreviewManager {
     context.subscriptions.push(
       vscode.commands.registerTextEditorCommand(Commands.OPEN_PREVIEW_TO_SIDE, this.openPreviewToSide, this)
     )
+    context.subscriptions.push(
+      vscode.commands.registerTextEditorCommand(Commands.SHOW_SOURCE, this.showSource, this)
+    )
     context.subscriptions.push(
       vscode.window.onDidChangeActiveTextEditor(this.onDidChangeEditor, this)
     )
@@ -74,6 +79,19 @@ export class PreviewManager {
     return await this.previewEditor(editor, vscode.ViewColumn.Beside)
   }
 
+  async showSource() {
+    if (!this.currentUri) {
+      return
+    }
+
+    let editor = findEditorFor(this.currentUri)
+    if (!editor) {
+      return
+    }
+
+    await vscode.window.showTextDocument(editor.document, { preview: false })
+  }
+
   private scrollEditor(params: { line: number }) {
     let editor = findEditorFor(this.currentUri)
     if (!editor) {
@@ -133,6 +151,7 @@ export class PreviewManager {
 
     this.currentUri = editor.document.uri
     panel.webview.postMessage({ 'show': result.uri })
+    this.setPreviewActiveContext(true)
   }
 
   private getPanel(placement: vscode.ViewColumn): vscode.WebviewPanel {
@@ -267,10 +286,19 @@ export class PreviewManager {
     this.panel.onDidDispose(() => {
       this.panel = undefined
       this.currentUri = undefined
+      this.setPreviewActiveContext(false)
     })
 
     return this.panel
   }
+
+  private setPreviewActiveContext(value: boolean) {
+    vscode.commands.executeCommand(
+        'setContext',
+        PreviewManager.rstPreviewActiveContextKey,
+        value
+    )
+  }
 }