Add base to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@8 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 88 insertions, 0 deletions

diff --git a/base/base_drag_source.cc b/base/base_drag_source.cc
new file mode 100644
index 0000000..daf40c7
--- /dev/null
+++ b/base/base_drag_source.cc
@@ -0,0 +1,88 @@
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include <atlbase.h>
+
+#include "base/base_drag_source.h"
+
+///////////////////////////////////////////////////////////////////////////////
+// BaseDragSource, public:
+
+BaseDragSource::BaseDragSource() : ref_count_(0) {
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// BaseDragSource, IDropSource implementation:
+
+HRESULT BaseDragSource::QueryContinueDrag(BOOL escape_pressed,
+                                          DWORD key_state) {
+  if (escape_pressed) {
+    OnDragSourceCancel();
+    return DRAGDROP_S_CANCEL;
+  }
+
+  if (!(key_state & MK_LBUTTON)) {
+    OnDragSourceDrop();
+    return DRAGDROP_S_DROP;
+  }
+
+  OnDragSourceMove();
+  return S_OK;
+}
+
+HRESULT BaseDragSource::GiveFeedback(DWORD effect) {
+  return DRAGDROP_S_USEDEFAULTCURSORS;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// BaseDragSource, IUnknown implementation:
+
+HRESULT BaseDragSource::QueryInterface(const IID& iid, void** object) {
+  *object = NULL;
+  if (IsEqualIID(iid, IID_IUnknown) || IsEqualIID(iid, IID_IDropSource)) {
+    *object = this;
+  } else {
+    return E_NOINTERFACE;
+  }
+  AddRef();
+  return S_OK;
+}
+
+ULONG BaseDragSource::AddRef() {
+  return InterlockedIncrement(&ref_count_);
+}
+
+ULONG BaseDragSource::Release() {
+  if (InterlockedDecrement(&ref_count_) == 0) {
+    ULONG copied_refcnt = ref_count_;
+    delete this;
+    return copied_refcnt;
+  }
+  return ref_count_;
+}