1 files changed, 238 insertions, 0 deletions
diff --git a/layout/xul/nsDeckFrame.cpp b/layout/xul/nsDeckFrame.cpp
new file mode 100644
index 0000000000..e9c7484a95
--- /dev/null
+++ b/layout/xul/nsDeckFrame.cpp
@@ -0,0 +1,238 @@
+/* -*- 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/. */
+
+//
+// Eric Vaughan
+// Netscape Communications
+//
+// See documentation in associated header file
+//
+
+#include "nsDeckFrame.h"
+#include "mozilla/ComputedStyle.h"
+#include "mozilla/PresShell.h"
+#include "nsPresContext.h"
+#include "nsIContent.h"
+#include "nsCOMPtr.h"
+#include "nsNameSpaceManager.h"
+#include "nsGkAtoms.h"
+#include "nsHTMLParts.h"
+#include "nsCSSRendering.h"
+#include "nsViewManager.h"
+#include "nsBoxLayoutState.h"
+#include "nsStackLayout.h"
+#include "nsDisplayList.h"
+#include "nsContainerFrame.h"
+#include "nsContentUtils.h"
+#include "nsXULPopupManager.h"
+#include "nsImageBoxFrame.h"
+#include "nsImageFrame.h"
+
+#ifdef ACCESSIBILITY
+#  include "nsAccessibilityService.h"
+#endif
+
+using namespace mozilla;
+
+nsIFrame* NS_NewDeckFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
+  return new (aPresShell) nsDeckFrame(aStyle, aPresShell->GetPresContext());
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsDeckFrame)
+
+NS_QUERYFRAME_HEAD(nsDeckFrame)
+  NS_QUERYFRAME_ENTRY(nsDeckFrame)
+NS_QUERYFRAME_TAIL_INHERITING(nsBoxFrame)
+
+nsDeckFrame::nsDeckFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
+    : nsBoxFrame(aStyle, aPresContext, kClassID), mIndex(0) {
+  nsCOMPtr<nsBoxLayout> layout;
+  NS_NewStackLayout(layout);
+  SetXULLayoutManager(layout);
+}
+
+nsresult nsDeckFrame::AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
+                                       int32_t aModType) {
+  nsresult rv =
+      nsBoxFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
+
+  // if the index changed hide the old element and make the new element visible
+  if (aAttribute == nsGkAtoms::selectedIndex) {
+    IndexChanged();
+  }
+
+  return rv;
+}
+
+void nsDeckFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
+                       nsIFrame* aPrevInFlow) {
+  nsBoxFrame::Init(aContent, aParent, aPrevInFlow);
+
+  mIndex = GetSelectedIndex();
+}
+
+void nsDeckFrame::ShowBox(nsIFrame* aBox) { Animate(aBox, true); }
+
+void nsDeckFrame::HideBox(nsIFrame* aBox) {
+  mozilla::PresShell::ClearMouseCapture(aBox);
+  Animate(aBox, false);
+}
+
+void nsDeckFrame::IndexChanged() {
+  // did the index change?
+  int32_t index = GetSelectedIndex();
+
+  if (index == mIndex) return;
+
+  // redraw
+  InvalidateFrame();
+
+  // hide the currently showing box
+  nsIFrame* currentBox = GetSelectedBox();
+  if (currentBox)  // only hide if it exists
+    HideBox(currentBox);
+
+  mIndex = index;
+
+  ShowBox(GetSelectedBox());
+
+#ifdef ACCESSIBILITY
+  nsAccessibilityService* accService = GetAccService();
+  if (accService) {
+    accService->DeckPanelSwitched(PresContext()->GetPresShell(), mContent,
+                                  currentBox, GetSelectedBox());
+  }
+#endif
+
+  // Force any popups that might be anchored on elements within hidden
+  // box to update.
+  nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
+  if (pm && currentBox) {
+    pm->UpdatePopupPositions(currentBox->PresContext()->RefreshDriver());
+  }
+}
+
+int32_t nsDeckFrame::GetSelectedIndex() {
+  // default index is 0
+  int32_t index = 0;
+
+  // get the index attribute
+  nsAutoString value;
+  if (mContent->AsElement()->GetAttr(kNameSpaceID_None,
+                                     nsGkAtoms::selectedIndex, value)) {
+    nsresult error;
+
+    // convert it to an integer
+    index = value.ToInteger(&error);
+  }
+
+  return index;
+}
+
+nsIFrame* nsDeckFrame::GetSelectedBox() {
+  return (mIndex >= 0) ? mFrames.FrameAt(mIndex) : nullptr;
+}
+
+void nsDeckFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
+                                   const nsDisplayListSet& aLists) {
+  // if a tab is hidden all its children are too.
+  if (StyleVisibility()->mVisible == StyleVisibility::Hidden) {
+    return;
+  }
+  nsBoxFrame::BuildDisplayList(aBuilder, aLists);
+}
+
+void nsDeckFrame::RemoveFrame(ChildListID aListID, nsIFrame* aOldFrame) {
+  nsIFrame* currentFrame = GetSelectedBox();
+  if (currentFrame && aOldFrame && currentFrame != aOldFrame) {
+    // If the frame we're removing is at an index that's less
+    // than mIndex, that means we're going to be shifting indexes
+    // by 1.
+    //
+    // We attempt to keep the same child displayed by automatically
+    // updating our internal notion of the current index.
+    int32_t removedIndex = mFrames.IndexOf(aOldFrame);
+    MOZ_ASSERT(removedIndex >= 0,
+               "A deck child was removed that was not in mFrames.");
+    if (removedIndex < mIndex) {
+      mIndex--;
+      // This is going to cause us to handle the index change in IndexedChanged,
+      // but since the new index will match mIndex, it's essentially a noop.
+      nsContentUtils::AddScriptRunner(new nsSetAttrRunnable(
+          mContent->AsElement(), nsGkAtoms::selectedIndex, mIndex));
+    }
+  }
+  nsBoxFrame::RemoveFrame(aListID, aOldFrame);
+}
+
+void nsDeckFrame::BuildDisplayListForChildren(nsDisplayListBuilder* aBuilder,
+                                              const nsDisplayListSet& aLists) {
+  // only paint the selected box
+  nsIFrame* box = GetSelectedBox();
+  if (!box) return;
+
+  // Putting the child in the background list. This is a little weird but
+  // it matches what we were doing before.
+  nsDisplayListSet set(aLists, aLists.BlockBorderBackgrounds());
+  BuildDisplayListForChild(aBuilder, box, set);
+}
+
+void nsDeckFrame::Animate(nsIFrame* aParentBox, bool start) {
+  if (!aParentBox) return;
+
+  nsImageBoxFrame* imgBoxFrame = do_QueryFrame(aParentBox);
+  nsImageFrame* imgFrame = do_QueryFrame(aParentBox);
+
+  if (imgBoxFrame) {
+    if (start)
+      imgBoxFrame->RestartAnimation();
+    else
+      imgBoxFrame->StopAnimation();
+  }
+
+  if (imgFrame) {
+    if (start)
+      imgFrame->RestartAnimation();
+    else
+      imgFrame->StopAnimation();
+  }
+
+  for (const auto& childList : aParentBox->ChildLists()) {
+    for (nsIFrame* child : childList.mList) {
+      Animate(child, start);
+    }
+  }
+}
+
+NS_IMETHODIMP
+nsDeckFrame::DoXULLayout(nsBoxLayoutState& aState) {
+  // Make sure we tweak the state so it does not resize our children.
+  // We will do that.
+  ReflowChildFlags oldFlags = aState.LayoutFlags();
+  aState.SetLayoutFlags(ReflowChildFlags::NoSizeView);
+
+  // do a normal layout
+  nsresult rv = nsBoxFrame::DoXULLayout(aState);
+
+  // run though each child. Hide all but the selected one
+  nsIFrame* box = nsIFrame::GetChildXULBox(this);
+
+  nscoord count = 0;
+  while (box) {
+    // make collapsed children not show up
+    if (count != mIndex) {
+      HideBox(box);
+    } else {
+      ShowBox(box);
+    }
+    box = GetNextXULBox(box);
+    count++;
+  }
+
+  aState.SetLayoutFlags(oldFlags);
+
+  return rv;
+}