1 files changed, 166 insertions, 0 deletions
diff --git a/layout/xul/nsTitleBarFrame.cpp b/layout/xul/nsTitleBarFrame.cpp
new file mode 100644
index 0000000000..d671741f56
--- /dev/null
+++ b/layout/xul/nsTitleBarFrame.cpp
@@ -0,0 +1,166 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsCOMPtr.h"
+#include "nsTitleBarFrame.h"
+#include "nsIContent.h"
+#include "mozilla/dom/Document.h"
+#include "nsGkAtoms.h"
+#include "nsIWidget.h"
+#include "nsMenuPopupFrame.h"
+#include "nsPresContext.h"
+#include "nsIDocShell.h"
+#include "nsPIDOMWindow.h"
+#include "nsDisplayList.h"
+#include "nsContentUtils.h"
+#include "mozilla/MouseEvents.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/dom/MouseEventBinding.h"
+
+using namespace mozilla;
+
+//
+// NS_NewTitleBarFrame
+//
+// Creates a new TitleBar frame and returns it
+//
+nsIFrame* NS_NewTitleBarFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
+  return new (aPresShell) nsTitleBarFrame(aStyle, aPresShell->GetPresContext());
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsTitleBarFrame)
+
+nsTitleBarFrame::nsTitleBarFrame(ComputedStyle* aStyle,
+                                 nsPresContext* aPresContext, ClassID aID)
+    : nsBoxFrame(aStyle, aPresContext, aID, false) {
+  mTrackingMouseMove = false;
+}
+
+void nsTitleBarFrame::BuildDisplayListForChildren(
+    nsDisplayListBuilder* aBuilder, const nsDisplayListSet& aLists) {
+  // override, since we don't want children to get events
+  if (aBuilder->IsForEventDelivery()) {
+    if (!mContent->AsElement()->AttrValueIs(kNameSpaceID_None,
+                                            nsGkAtoms::allowevents,
+                                            nsGkAtoms::_true, eCaseMatters))
+      return;
+  }
+  nsBoxFrame::BuildDisplayListForChildren(aBuilder, aLists);
+}
+
+nsresult nsTitleBarFrame::HandleEvent(nsPresContext* aPresContext,
+                                      WidgetGUIEvent* aEvent,
+                                      nsEventStatus* aEventStatus) {
+  NS_ENSURE_ARG_POINTER(aEventStatus);
+  if (nsEventStatus_eConsumeNoDefault == *aEventStatus) {
+    return NS_OK;
+  }
+
+  bool doDefault = true;
+
+  switch (aEvent->mMessage) {
+    case eMouseDown: {
+      if (aEvent->AsMouseEvent()->mButton == MouseButton::ePrimary) {
+        // titlebar has no effect in non-chrome shells
+        if (aPresContext->IsChrome()) {
+          // we're tracking.
+          mTrackingMouseMove = true;
+
+          // start capture.
+          PresShell::SetCapturingContent(GetContent(),
+                                         CaptureFlags::IgnoreAllowedState);
+
+          // remember current mouse coordinates.
+          mLastPoint = aEvent->mRefPoint;
+        }
+
+        *aEventStatus = nsEventStatus_eConsumeNoDefault;
+        doDefault = false;
+      }
+    } break;
+
+    case eMouseUp: {
+      if (mTrackingMouseMove &&
+          aEvent->AsMouseEvent()->mButton == MouseButton::ePrimary) {
+        // we're done tracking.
+        mTrackingMouseMove = false;
+
+        // end capture
+        PresShell::ReleaseCapturingContent();
+
+        *aEventStatus = nsEventStatus_eConsumeNoDefault;
+        doDefault = false;
+      }
+    } break;
+
+    case eMouseMove: {
+      if (mTrackingMouseMove) {
+        LayoutDeviceIntPoint nsMoveBy = aEvent->mRefPoint - mLastPoint;
+
+        nsIFrame* parent = GetParent();
+        while (parent) {
+          nsMenuPopupFrame* popupFrame = do_QueryFrame(parent);
+          if (popupFrame) break;
+          parent = parent->GetParent();
+        }
+
+        // if the titlebar is in a popup, move the popup frame, otherwise
+        // move the widget associated with the window
+        if (parent) {
+          nsMenuPopupFrame* menuPopupFrame =
+              static_cast<nsMenuPopupFrame*>(parent);
+          nsCOMPtr<nsIWidget> widget = menuPopupFrame->GetWidget();
+          LayoutDeviceIntRect bounds = widget->GetScreenBounds();
+
+          CSSPoint cssPos = (bounds.TopLeft() + nsMoveBy) /
+                            aPresContext->CSSToDevPixelScale();
+          menuPopupFrame->MoveTo(RoundedToInt(cssPos), false);
+        } else {
+          mozilla::PresShell* presShell = aPresContext->PresShell();
+          nsPIDOMWindowOuter* window = presShell->GetDocument()->GetWindow();
+          if (window) {
+            window->MoveBy(nsMoveBy.x, nsMoveBy.y);
+          }
+        }
+
+        *aEventStatus = nsEventStatus_eConsumeNoDefault;
+
+        doDefault = false;
+      }
+    } break;
+
+    case eMouseClick: {
+      WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
+      if (mouseEvent->IsLeftClickEvent()
+#ifdef XP_MACOSX
+          // On Mac, ctrl-click will send a context menu event from the widget,
+          // so we don't want to dispatch widget command if it is redispatched
+          // from the mouse event with ctrl key is pressed.
+          && !mouseEvent->IsControl()
+#endif
+      ) {
+        MouseClicked(mouseEvent);
+      }
+      break;
+    }
+
+    default:
+      break;
+  }
+
+  if (doDefault)
+    return nsBoxFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
+  else
+    return NS_OK;
+}
+
+void nsTitleBarFrame::MouseClicked(WidgetMouseEvent* aEvent) {
+  // Execute the oncommand event handler.
+  nsCOMPtr<nsIContent> content = mContent;
+  nsContentUtils::DispatchXULCommand(
+      content, false, nullptr, nullptr, aEvent->IsControl(), aEvent->IsAlt(),
+      aEvent->IsShift(), aEvent->IsMeta(), aEvent->mInputSource);
+}