layout/xul/nsScrollbarFrame.cpp@925c144e1f1f (annotated)
layout/xul/nsScrollbarFrame.cpp
Fri, 16 Jan 2015 18:13:44 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 18:13:44 +0100
- branch
- TOR_BUG_9701
- changeset 14
- 925c144e1f1f
- permissions
- -rw-r--r--
Integrate suggestion from review to improve consistency with existing code.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | // |
| michael@0 | 7 | // Eric Vaughan |
| michael@0 | 8 | // Netscape Communications |
| michael@0 | 9 | // |
| michael@0 | 10 | // See documentation in associated header file |
| michael@0 | 11 | // |
| michael@0 | 12 | |
| michael@0 | 13 | #include "nsScrollbarFrame.h" |
| michael@0 | 14 | #include "nsScrollbarButtonFrame.h" |
| michael@0 | 15 | #include "nsGkAtoms.h" |
| michael@0 | 16 | #include "nsIScrollableFrame.h" |
| michael@0 | 17 | #include "nsIScrollbarMediator.h" |
| michael@0 | 18 | #include "mozilla/LookAndFeel.h" |
| michael@0 | 19 | #include "nsThemeConstants.h" |
| michael@0 | 20 | #include "nsRenderingContext.h" |
| michael@0 | 21 | #include "nsIContent.h" |
| michael@0 | 22 | |
| michael@0 | 23 | using namespace mozilla; |
| michael@0 | 24 | |
| michael@0 | 25 | // |
| michael@0 | 26 | // NS_NewScrollbarFrame |
| michael@0 | 27 | // |
| michael@0 | 28 | // Creates a new scrollbar frame and returns it |
| michael@0 | 29 | // |
| michael@0 | 30 | nsIFrame* |
| michael@0 | 31 | NS_NewScrollbarFrame (nsIPresShell* aPresShell, nsStyleContext* aContext) |
| michael@0 | 32 | { |
| michael@0 | 33 | return new (aPresShell) nsScrollbarFrame (aPresShell, aContext); |
| michael@0 | 34 | } |
| michael@0 | 35 | |
| michael@0 | 36 | NS_IMPL_FRAMEARENA_HELPERS(nsScrollbarFrame) |
| michael@0 | 37 | |
| michael@0 | 38 | NS_QUERYFRAME_HEAD(nsScrollbarFrame) |
| michael@0 | 39 | NS_QUERYFRAME_ENTRY(nsScrollbarFrame) |
| michael@0 | 40 | NS_QUERYFRAME_TAIL_INHERITING(nsBoxFrame) |
| michael@0 | 41 | |
| michael@0 | 42 | void |
| michael@0 | 43 | nsScrollbarFrame::Init(nsIContent* aContent, |
| michael@0 | 44 | nsIFrame* aParent, |
| michael@0 | 45 | nsIFrame* aPrevInFlow) |
| michael@0 | 46 | { |
| michael@0 | 47 | nsBoxFrame::Init(aContent, aParent, aPrevInFlow); |
| michael@0 | 48 | |
| michael@0 | 49 | // We want to be a reflow root since we use reflows to move the |
| michael@0 | 50 | // slider. Any reflow inside the scrollbar frame will be a reflow to |
| michael@0 | 51 | // move the slider and will thus not change anything outside of the |
| michael@0 | 52 | // scrollbar or change the size of the scrollbar frame. |
| michael@0 | 53 | mState |= NS_FRAME_REFLOW_ROOT; |
| michael@0 | 54 | } |
| michael@0 | 55 | |
| michael@0 | 56 | nsresult |
| michael@0 | 57 | nsScrollbarFrame::Reflow(nsPresContext* aPresContext, |
| michael@0 | 58 | nsHTMLReflowMetrics& aDesiredSize, |
| michael@0 | 59 | const nsHTMLReflowState& aReflowState, |
| michael@0 | 60 | nsReflowStatus& aStatus) |
| michael@0 | 61 | { |
| michael@0 | 62 | nsresult rv = nsBoxFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus); |
| michael@0 | 63 | NS_ENSURE_SUCCESS(rv, rv); |
| michael@0 | 64 | |
| michael@0 | 65 | // nsGfxScrollFrame may have told us to shrink to nothing. If so, make sure our |
| michael@0 | 66 | // desired size agrees. |
| michael@0 | 67 | if (aReflowState.AvailableWidth() == 0) { |
| michael@0 | 68 | aDesiredSize.Width() = 0; |
| michael@0 | 69 | } |
| michael@0 | 70 | if (aReflowState.AvailableHeight() == 0) { |
| michael@0 | 71 | aDesiredSize.Height() = 0; |
| michael@0 | 72 | } |
| michael@0 | 73 | |
| michael@0 | 74 | return NS_OK; |
| michael@0 | 75 | } |
| michael@0 | 76 | |
| michael@0 | 77 | nsIAtom* |
| michael@0 | 78 | nsScrollbarFrame::GetType() const |
| michael@0 | 79 | { |
| michael@0 | 80 | return nsGkAtoms::scrollbarFrame; |
| michael@0 | 81 | } |
| michael@0 | 82 | |
| michael@0 | 83 | nsresult |
| michael@0 | 84 | nsScrollbarFrame::AttributeChanged(int32_t aNameSpaceID, |
| michael@0 | 85 | nsIAtom* aAttribute, |
| michael@0 | 86 | int32_t aModType) |
| michael@0 | 87 | { |
| michael@0 | 88 | nsresult rv = nsBoxFrame::AttributeChanged(aNameSpaceID, aAttribute, |
| michael@0 | 89 | aModType); |
| michael@0 | 90 | |
| michael@0 | 91 | // if the current position changes, notify any nsGfxScrollFrame |
| michael@0 | 92 | // parent we may have |
| michael@0 | 93 | if (aAttribute != nsGkAtoms::curpos) |
| michael@0 | 94 | return rv; |
| michael@0 | 95 | |
| michael@0 | 96 | nsIScrollableFrame* scrollable = do_QueryFrame(GetParent()); |
| michael@0 | 97 | if (!scrollable) |
| michael@0 | 98 | return rv; |
| michael@0 | 99 | |
| michael@0 | 100 | nsCOMPtr<nsIContent> kungFuDeathGrip(mContent); |
| michael@0 | 101 | scrollable->CurPosAttributeChanged(mContent); |
| michael@0 | 102 | return rv; |
| michael@0 | 103 | } |
| michael@0 | 104 | |
| michael@0 | 105 | NS_IMETHODIMP |
| michael@0 | 106 | nsScrollbarFrame::HandlePress(nsPresContext* aPresContext, |
| michael@0 | 107 | WidgetGUIEvent* aEvent, |
| michael@0 | 108 | nsEventStatus* aEventStatus) |
| michael@0 | 109 | { |
| michael@0 | 110 | return NS_OK; |
| michael@0 | 111 | } |
| michael@0 | 112 | |
| michael@0 | 113 | NS_IMETHODIMP |
| michael@0 | 114 | nsScrollbarFrame::HandleMultiplePress(nsPresContext* aPresContext, |
| michael@0 | 115 | WidgetGUIEvent* aEvent, |
| michael@0 | 116 | nsEventStatus* aEventStatus, |
| michael@0 | 117 | bool aControlHeld) |
| michael@0 | 118 | { |
| michael@0 | 119 | return NS_OK; |
| michael@0 | 120 | } |
| michael@0 | 121 | |
| michael@0 | 122 | NS_IMETHODIMP |
| michael@0 | 123 | nsScrollbarFrame::HandleDrag(nsPresContext* aPresContext, |
| michael@0 | 124 | WidgetGUIEvent* aEvent, |
| michael@0 | 125 | nsEventStatus* aEventStatus) |
| michael@0 | 126 | { |
| michael@0 | 127 | return NS_OK; |
| michael@0 | 128 | } |
| michael@0 | 129 | |
| michael@0 | 130 | NS_IMETHODIMP |
| michael@0 | 131 | nsScrollbarFrame::HandleRelease(nsPresContext* aPresContext, |
| michael@0 | 132 | WidgetGUIEvent* aEvent, |
| michael@0 | 133 | nsEventStatus* aEventStatus) |
| michael@0 | 134 | { |
| michael@0 | 135 | return NS_OK; |
| michael@0 | 136 | } |
| michael@0 | 137 | |
| michael@0 | 138 | void |
| michael@0 | 139 | nsScrollbarFrame::SetScrollbarMediatorContent(nsIContent* aMediator) |
| michael@0 | 140 | { |
| michael@0 | 141 | mScrollbarMediator = aMediator; |
| michael@0 | 142 | } |
| michael@0 | 143 | |
| michael@0 | 144 | nsIScrollbarMediator* |
| michael@0 | 145 | nsScrollbarFrame::GetScrollbarMediator() |
| michael@0 | 146 | { |
| michael@0 | 147 | if (!mScrollbarMediator) |
| michael@0 | 148 | return nullptr; |
| michael@0 | 149 | nsIFrame* f = mScrollbarMediator->GetPrimaryFrame(); |
| michael@0 | 150 | |
| michael@0 | 151 | // check if the frame is a scroll frame. If so, get the scrollable frame |
| michael@0 | 152 | // inside it. |
| michael@0 | 153 | nsIScrollableFrame* scrollFrame = do_QueryFrame(f); |
| michael@0 | 154 | if (scrollFrame) { |
| michael@0 | 155 | f = scrollFrame->GetScrolledFrame(); |
| michael@0 | 156 | } |
| michael@0 | 157 | |
| michael@0 | 158 | nsIScrollbarMediator* sbm = do_QueryFrame(f); |
| michael@0 | 159 | return sbm; |
| michael@0 | 160 | } |
| michael@0 | 161 | |
| michael@0 | 162 | nsresult |
| michael@0 | 163 | nsScrollbarFrame::GetMargin(nsMargin& aMargin) |
| michael@0 | 164 | { |
| michael@0 | 165 | aMargin.SizeTo(0,0,0,0); |
| michael@0 | 166 | |
| michael@0 | 167 | if (LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars) != 0) { |
| michael@0 | 168 | nsPresContext* presContext = PresContext(); |
| michael@0 | 169 | nsITheme* theme = presContext->GetTheme(); |
| michael@0 | 170 | if (theme) { |
| michael@0 | 171 | nsIntSize size; |
| michael@0 | 172 | bool isOverridable; |
| michael@0 | 173 | nsRefPtr<nsRenderingContext> rc = |
| michael@0 | 174 | presContext->PresShell()->CreateReferenceRenderingContext(); |
| michael@0 | 175 | theme->GetMinimumWidgetSize(rc, this, NS_THEME_SCROLLBAR, &size, |
| michael@0 | 176 | &isOverridable); |
| michael@0 | 177 | if (IsHorizontal()) { |
| michael@0 | 178 | aMargin.top = -presContext->DevPixelsToAppUnits(size.height); |
| michael@0 | 179 | } |
| michael@0 | 180 | else { |
| michael@0 | 181 | if (StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) { |
| michael@0 | 182 | aMargin.right = -presContext->DevPixelsToAppUnits(size.width); |
| michael@0 | 183 | } |
| michael@0 | 184 | else { |
| michael@0 | 185 | aMargin.left = -presContext->DevPixelsToAppUnits(size.width); |
| michael@0 | 186 | } |
| michael@0 | 187 | } |
| michael@0 | 188 | return NS_OK; |
| michael@0 | 189 | } |
| michael@0 | 190 | } |
| michael@0 | 191 | |
| michael@0 | 192 | return nsBox::GetMargin(aMargin); |
| michael@0 | 193 | } |
