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45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "ScrollAnchorContainer.h"
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#include "nsGfxScrollFrame.h"
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#include "nsLayoutUtils.h"
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#define ANCHOR_LOG(...)
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// #define ANCHOR_LOG(...) printf_stderr("ANCHOR: " __VA_ARGS__)
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namespace mozilla {
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namespace layout {
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ScrollAnchorContainer::ScrollAnchorContainer(ScrollFrameHelper* aScrollFrame)
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: mScrollFrame(aScrollFrame) {}
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ScrollAnchorContainer::~ScrollAnchorContainer() {}
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ScrollAnchorContainer* ScrollAnchorContainer::FindFor(nsIFrame* aFrame) {
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aFrame = aFrame->GetParent();
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if (!aFrame) {
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return nullptr;
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}
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nsIScrollableFrame* nearest = nsLayoutUtils::GetNearestScrollableFrame(
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aFrame, nsLayoutUtils::SCROLLABLE_SAME_DOC |
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nsLayoutUtils::SCROLLABLE_INCLUDE_HIDDEN);
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if (nearest) {
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return nearest->GetAnchor();
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}
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return nullptr;
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}
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nsIFrame* ScrollAnchorContainer::Frame() const { return mScrollFrame->mOuter; }
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nsIScrollableFrame* ScrollAnchorContainer::ScrollableFrame() const {
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return Frame()->GetScrollTargetFrame();
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}
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} // namespace layout
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} // namespace mozilla
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