installed pty

[VSoRC/.git] / node_modules / node-pty / deps / winpty / src / agent / Win32Console.cc

diff --git a/node_modules/node-pty/deps/winpty/src/agent/Win32Console.cc b/node_modules/node-pty/deps/winpty/src/agent/Win32Console.cc
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+// Copyright (c) 2011-2016 Ryan Prichard
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+
+#include "Win32Console.h"
+
+#include <windows.h>
+#include <wchar.h>
+
+#include <string>
+
+#include "../shared/DebugClient.h"
+#include "../shared/WinptyAssert.h"
+
+Win32Console::Win32Console() : m_titleWorkBuf(16)
+{
+    // The console window must be non-NULL.  It is used for two purposes:
+    //  (1) "Freezing" the console to detect the exact number of lines that
+    //      have scrolled.
+    //  (2) Killing processes attached to the console, by posting a WM_CLOSE
+    //      message to the console window.
+    m_hwnd = GetConsoleWindow();
+    ASSERT(m_hwnd != nullptr);
+}
+
+std::wstring Win32Console::title()
+{
+    while (true) {
+        // Calling GetConsoleTitleW is tricky, because its behavior changed
+        // from XP->Vista, then again from Win7->Win8.  The Vista+Win7 behavior
+        // is especially broken.
+        //
+        // The MSDN documentation documents nSize as the "size of the buffer
+        // pointed to by the lpConsoleTitle parameter, in characters" and the
+        // successful return value as "the length of the console window's
+        // title, in characters."
+        //
+        // On XP, the function returns the title length, AFTER truncation
+        // (excluding the NUL terminator).  If the title is blank, the API
+        // returns 0 and does not NUL-terminate the buffer.  To accommodate
+        // XP, the function must:
+        //  * Terminate the buffer itself.
+        //  * Double the size of the title buffer in a loop.
+        //
+        // On Vista and up, the function returns the non-truncated title
+        // length (excluding the NUL terminator).
+        //
+        // On Vista and Windows 7, there is a bug where the buffer size is
+        // interpreted as a byte count rather than a wchar_t count.  To
+        // work around this, we must pass GetConsoleTitleW a buffer that is
+        // twice as large as what is actually needed.
+        //
+        // See misc/*/Test_GetConsoleTitleW.cc for tests demonstrating Windows'
+        // behavior.
+
+        DWORD count = GetConsoleTitleW(m_titleWorkBuf.data(),
+                                       m_titleWorkBuf.size());
+        const size_t needed = (count + 1) * sizeof(wchar_t);
+        if (m_titleWorkBuf.size() < needed) {
+            m_titleWorkBuf.resize(needed);
+            continue;
+        }
+        m_titleWorkBuf[count] = L'\0';
+        return m_titleWorkBuf.data();
+    }
+}
+
+void Win32Console::setTitle(const std::wstring &title)
+{
+    if (!SetConsoleTitleW(title.c_str())) {
+        trace("SetConsoleTitleW failed");
+    }
+}
+
+void Win32Console::setFrozen(bool frozen) {
+    const int SC_CONSOLE_MARK = 0xFFF2;
+    const int SC_CONSOLE_SELECT_ALL = 0xFFF5;
+    if (frozen == m_frozen) {
+        // Do nothing.
+    } else if (frozen) {
+        // Enter selection mode by activating either Mark or SelectAll.
+        const int command = m_freezeUsesMark ? SC_CONSOLE_MARK
+                                             : SC_CONSOLE_SELECT_ALL;
+        SendMessage(m_hwnd, WM_SYSCOMMAND, command, 0);
+        m_frozen = true;
+    } else {
+        // Send Escape to cancel the selection.
+        SendMessage(m_hwnd, WM_CHAR, 27, 0x00010001);
+        m_frozen = false;
+    }
+}