1 /* 2 * Copyright (c) 2009, Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_SCROLL_SCROLLBAR_THEME_AURA_H_ 32 #define THIRD_PARTY_BLINK_RENDERER_CORE_SCROLL_SCROLLBAR_THEME_AURA_H_ 33 34 #include "base/gtest_prod_util.h" 35 #include "third_party/blink/renderer/core/scroll/scrollbar_theme.h" 36 37 namespace blink { 38 39 class CORE_EXPORT ScrollbarThemeAura : public ScrollbarTheme { 40 public: 41 int ScrollbarThickness(ScrollbarControlSize) override; 42 43 protected: NativeThemeHasButtons()44 bool NativeThemeHasButtons() override { return true; } 45 bool HasThumb(const Scrollbar&) override; 46 47 IntRect BackButtonRect(const Scrollbar&) override; 48 IntRect ForwardButtonRect(const Scrollbar&) override; 49 IntRect TrackRect(const Scrollbar&) override; 50 int MinimumThumbLength(const Scrollbar&) override; 51 52 void PaintTrack(GraphicsContext&, const Scrollbar&, const IntRect&) override; 53 void PaintButton(GraphicsContext&, 54 const Scrollbar&, 55 const IntRect&, 56 ScrollbarPart) override; 57 void PaintThumb(GraphicsContext&, const Scrollbar&, const IntRect&) override; 58 59 bool ShouldRepaintAllPartsOnInvalidation() const override; 60 ScrollbarPart PartsToInvalidateOnThumbPositionChange( 61 const Scrollbar&, 62 float old_position, 63 float new_position) const override; 64 65 bool ShouldCenterOnThumb(const Scrollbar&, const WebMouseEvent&) override; 66 67 // During a thumb drag, if the pointer moves outside a certain threshold in 68 // the non-scrolling direction, the scroller is expected to "snap back" to the 69 // location where the drag first originated from. 70 bool SupportsDragSnapBack() const override; 71 bool ShouldSnapBackToDragOrigin(const Scrollbar&, 72 const WebMouseEvent&) override; 73 74 private: 75 FRIEND_TEST_ALL_PREFIXES(ScrollbarThemeAuraTest, ButtonSizeHorizontal); 76 FRIEND_TEST_ALL_PREFIXES(ScrollbarThemeAuraTest, ButtonSizeVertical); 77 FRIEND_TEST_ALL_PREFIXES(ScrollbarThemeAuraTest, NoButtonsReturnsSize0); 78 79 virtual bool HasScrollbarButtons(ScrollbarOrientation) const; 80 IntSize ButtonSize(const Scrollbar&); 81 }; 82 83 } // namespace blink 84 85 #endif 86