xterm

[VSoRC/.git] / node_modules / xterm / src / WindowsMode.ts

diff --git a/node_modules/xterm/src/WindowsMode.ts b/node_modules/xterm/src/WindowsMode.ts
new file mode 100644 (file)
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--- /dev/null
+++ b/node_modules/xterm/src/WindowsMode.ts
@@ -0,0 +1,28 @@
+/**
+ * Copyright (c) 2019 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+import { IDisposable } from 'xterm';
+import { ITerminal } from './Types';
+import { CHAR_DATA_CODE_INDEX, NULL_CELL_CODE, WHITESPACE_CELL_CODE } from 'common/buffer/Constants';
+
+export function applyWindowsMode(terminal: ITerminal): IDisposable {
+  // Winpty does not support wraparound mode which means that lines will never
+  // be marked as wrapped. This causes issues for things like copying a line
+  // retaining the wrapped new line characters or if consumers are listening
+  // in on the data stream.
+  //
+  // The workaround for this is to listen to every incoming line feed and mark
+  // the line as wrapped if the last character in the previous line is not a
+  // space. This is certainly not without its problems, but generally on
+  // Windows when text reaches the end of the terminal it's likely going to be
+  // wrapped.
+  return terminal.onLineFeed(() => {
+    const line = terminal.buffer.lines.get(terminal.buffer.ybase + terminal.buffer.y - 1);
+    const lastChar = line.get(terminal.cols - 1);
+
+    const nextLine = terminal.buffer.lines.get(terminal.buffer.ybase + terminal.buffer.y);
+    nextLine.isWrapped = (lastChar[CHAR_DATA_CODE_INDEX] !== NULL_CELL_CODE && lastChar[CHAR_DATA_CODE_INDEX] !== WHITESPACE_CELL_CODE);
+  });
+}