1 files changed, 68 insertions, 0 deletions
diff --git a/chromium/tools/win/chromeexts/commands/hwnd_command.cc b/chromium/tools/win/chromeexts/commands/hwnd_command.cc
new file mode 100644
index 00000000000..7fb914171a6
--- /dev/null
+++ b/chromium/tools/win/chromeexts/commands/hwnd_command.cc
@@ -0,0 +1,68 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "tools/win/chromeexts/commands/hwnd_command.h"
+
+#include <dbgeng.h>
+#include <windows.h>
+
+namespace tools {
+namespace win {
+namespace chromeexts {
+
+namespace {
+constexpr size_t kMaxWindowStringLength = 256;
+}  // namespace
+
+HwndCommand::HwndCommand() = default;
+
+HwndCommand::~HwndCommand() = default;
+
+HRESULT HwndCommand::Execute() {
+  // While sizeof(HWND) can change between 32-bit and 64-bit platforms, Windows
+  // only cares about the lower 32-bits. We evaluate as 64-bit as a convenience
+  // and truncate the displayed hwnds to 32-bit below.
+  // See https://msdn.microsoft.com/en-us/library/aa384203.aspx
+  DEBUG_VALUE value;
+  HRESULT hr = debug_control()->Evaluate(args().c_str(), DEBUG_VALUE_INT64,
+                                         &value, nullptr);
+  if (FAILED(hr)) {
+    PrintErrorf("Unable to evaluate %s\n", args().c_str());
+    return hr;
+  }
+
+  HWND hwnd = reinterpret_cast<HWND>(value.I64);
+  if (!IsWindow(hwnd)) {
+    PrintErrorf("Not a window: %s\n", args().c_str());
+    return E_FAIL;
+  }
+
+  wchar_t title[kMaxWindowStringLength];
+  GetWindowText(hwnd, title, ARRAYSIZE(title));
+  Printf("Title: %ws\n", title);
+  wchar_t window_class[kMaxWindowStringLength];
+  GetClassName(hwnd, window_class, ARRAYSIZE(window_class));
+  Printf("Class: %ws\n", window_class);
+  Printf("Hierarchy: \n");
+  Printf("   Owner: %08x Parent: %08x\n", GetWindow(hwnd, GW_OWNER),
+         GetParent(hwnd));
+  Printf("   Prev:  %08x Next:   %08x\n", GetNextWindow(hwnd, GW_HWNDPREV),
+         GetNextWindow(hwnd, GW_HWNDNEXT));
+  Printf("Styles: %08x (Ex: %08x)\n", GetWindowLong(hwnd, GWL_STYLE),
+         GetWindowLong(hwnd, GWL_EXSTYLE));
+  RECT window_rect;
+  if (GetWindowRect(hwnd, &window_rect)) {
+    Printf("Bounds: (%d, %d) %dx%d\n", window_rect.left, window_rect.top,
+           window_rect.right - window_rect.left,
+           window_rect.bottom - window_rect.top);
+  } else {
+    DWORD last_error = GetLastError();
+    PrintErrorf("Bounds: Unavailable (Last Error = %d)\n", last_error);
+  }
+  return S_OK;
+}
+
+}  // namespace chromeexts
+}  // namespace win
+}  // namespace tools