Properly format file path on drop in Windows

src/vs/workbench/parts/terminal/common/terminal.ts

@@ -357,4 +357,9 @@ export interface ITerminalInstance {
 	 * Sets the title of the terminal instance.
 	 */
 	setTitle(title: string): void;
+
+	/**
+	 * Returns the list of nested shells running in the terminal. This is only implemented for Windows.
+	 */
+	getShellList(): Promise<string[]>;
 }

src/vs/workbench/parts/terminal/electron-browser/terminalInstance.ts

@@ -825,6 +825,47 @@ export class TerminalInstance implements ITerminalInstance {
 			this._messageTitleListener = null;
 		}
 	}
+
+	private static getChildProcesses(pid: number): Promise<{executable: string, pid: number}[]> {
+		return new Promise((resolve, reject) => {
+			cp.execFile('wmic.exe', ['process', 'where', `parentProcessId=${pid}`, 'get', 'ExecutablePath,ProcessId'], (err, stdout, stderr) => {
+				if (err) {
+					reject(err);
+				} else if (stderr.length > 0) {
+					resolve([]); // No processes found
+				} else {
+					resolve(stdout.split('\n').slice(1).filter(str => str.length > 0).map(str => {
+						const s = str.split('  ');
+						return {executable: s[0], pid: Number(s[1])};
+					}));
+				}
+			});
+		});
+	}
+
+	public async getShellList(): Promise<string[]> {
+		if (platform.platform !== platform.Platform.Windows) {
+			return [];
+		}
+
+		const shells = ['bash.exe', 'cmd.exe', 'powershell.exe'];
+		const pList = [this._shellLaunchConfig.executable];
+
+		let pid = this._processId;
+		while (pid !== null) {
+			const oldPid = pid;
+			pid = null;
+			for (const childproc of await TerminalInstance.getChildProcesses(oldPid)) {
+				if (shells.indexOf(path.basename(childproc.executable)) !== -1) {
+					pList.push(childproc.executable);
+					pid = childproc.pid;
+					break;
+				}
+			}
+		}
+
+		return pList;
+	}
 }
 
 registerThemingParticipant((theme: ITheme, collector: ICssStyleCollector) => {
@@ -848,4 +889,4 @@ registerThemingParticipant((theme: ITheme, collector: ICssStyleCollector) => {
 	if (scrollbarSliderActiveBackgroundColor) {
 		collector.addRule(`.monaco-workbench .panel.integrated-terminal .xterm .xterm-viewport::-webkit-scrollbar-thumb:active { background-color: ${scrollbarSliderActiveBackgroundColor}; }`);
 	}
-});
\ No newline at end of file
+});

src/vs/workbench/parts/terminal/electron-browser/terminalPanel.ts

@@ -232,21 +232,47 @@ export class TerminalPanel extends Panel {
 					return;
 				}
 
-				// Check if the file was dragged from the tree explorer
-				let uri = e.dataTransfer.getData('URL');
+				const winFormatters: [RegExp, (uri: URI) => string][] = [
+					// WSL bash
+					[/^C:\\Windows\\(System32|sysnative)\\bash.exe$/i, uri => '/mnt/' + uri.path[1] + uri.path.substring(3)],
+					// Git bash
+					[/bash.exe$/i, uri => uri.path.substring(0, 2) + uri.path.substring(3)],
+
+					[/cmd.exe$/i, uri => uri.path[1].toUpperCase() + uri.path.substring(2).replace(/\//g, '\\')],
+					[/powershell.exe$/i, uri => uri.path[1].toUpperCase() + uri.path.substring(2).replace(/\//g, '\\')],
+				];
+
+				const terminal = this._terminalService.getActiveInstance();
+
+				const uriForm = async (uri: URI) => {
+					if (platform.isWindows) {
+						const shells = await terminal.getShellList();
+						const shell = shells[shells.length - 1];
+
+						for (const formatter of winFormatters) {
+							if (formatter[0].test(shell)) {
+								return formatter[1](uri);
+							}
+						}
+					}
+					return uri.path;
+				};
+
+				const uri = e.dataTransfer.getData('URL');
+				let urip = Promise.resolve(uri);
 				if (uri) {
-					uri = URI.parse(uri).path;
+					urip = uriForm(URI.parse(uri));
 				} else if (e.dataTransfer.files.length > 0) {
 					// Check if the file was dragged from the filesystem
-					uri = URI.file(e.dataTransfer.files[0].path).path;
+					urip = uriForm(URI.file(e.dataTransfer.files[0].path));
 				}
 
-				if (!uri) {
-					return;
-				}
-
-				const terminal = this._terminalService.getActiveInstance();
-				terminal.sendText(this._preparePathForTerminal(uri), false);
+				urip.then(uri => {
+					if (!uri) {
+						return;
+					}
+					terminal.sendText(this._preparePathForTerminal(uri), false);
+				});
 			}
 		}));
 	}