| /* |
| * Copyright (C) 2008, 2009 Apple 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: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_SCROLLBAR_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_SCROLLBAR_H_ |
| |
| #include "third_party/blink/renderer/core/scroll/scrollbar.h" |
| #include "third_party/blink/renderer/core/style/computed_style_constants.h" |
| #include "third_party/blink/renderer/platform/heap/handle.h" |
| #include "third_party/blink/renderer/platform/wtf/hash_map.h" |
| |
| namespace blink { |
| |
| class ComputedStyle; |
| class Element; |
| class LayoutBox; |
| class LayoutObject; |
| class LayoutScrollbarPart; |
| |
| class LayoutScrollbar final : public Scrollbar { |
| public: |
| static Scrollbar* CreateCustomScrollbar(ScrollableArea*, |
| ScrollbarOrientation, |
| Element*); |
| |
| LayoutScrollbar(ScrollableArea*, ScrollbarOrientation, Element*); |
| ~LayoutScrollbar() override; |
| |
| // Return the thickness that a custom scrollbar would have, without actually |
| // constructing the scrollbar. |
| static int HypotheticalScrollbarThickness(ScrollbarOrientation, |
| const LayoutBox& enclosing_box, |
| const LayoutObject& style_source); |
| |
| // The Element that supplies our style information. If the scrollbar is |
| // for a document, this is either the <body> or <html> element. Otherwise, it |
| // is the element that owns our PaintLayerScrollableArea. |
| Element* StyleSource() const { return style_source_.Get(); } |
| |
| IntRect ButtonRect(ScrollbarPart) const; |
| IntRect TrackRect(int start_length, int end_length) const; |
| IntRect TrackPieceRectWithMargins(ScrollbarPart, const IntRect&) const; |
| |
| int MinimumThumbLength() const; |
| |
| bool IsOverlayScrollbar() const override { return false; } |
| |
| LayoutScrollbarPart* GetPart(ScrollbarPart part_type) { |
| return parts_.at(part_type); |
| } |
| const LayoutScrollbarPart* GetPart(ScrollbarPart part_type) const { |
| return parts_.at(part_type); |
| } |
| |
| void InvalidateDisplayItemClientsOfScrollbarParts(); |
| |
| void SetVisualRect(const LayoutRect&) final; |
| |
| void Trace(blink::Visitor*) override; |
| |
| private: |
| friend class Scrollbar; |
| |
| void SetEnabled(bool) override; |
| void DisconnectFromScrollableArea() override; |
| |
| void SetHoveredPart(ScrollbarPart) override; |
| void SetPressedPart(ScrollbarPart) override; |
| |
| void StyleChanged() override; |
| |
| bool IsCustomScrollbar() const override { return true; } |
| |
| void UpdateScrollbarParts(bool destroy = false); |
| |
| scoped_refptr<ComputedStyle> GetScrollbarPseudoStyle(ScrollbarPart, PseudoId); |
| void UpdateScrollbarPart(ScrollbarPart, bool destroy = false); |
| |
| // The element that supplies our style information. |
| Member<Element> style_source_; |
| |
| HashMap<unsigned, LayoutScrollbarPart*> parts_; |
| }; |
| |
| DEFINE_TYPE_CASTS(LayoutScrollbar, |
| Scrollbar, |
| scrollbar, |
| scrollbar->IsCustomScrollbar(), |
| scrollbar.IsCustomScrollbar()); |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LAYOUT_SCROLLBAR_H_ |
