1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/xul/nsScrollbarFrame.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,193 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +//
1.10 +// Eric Vaughan
1.11 +// Netscape Communications
1.12 +//
1.13 +// See documentation in associated header file
1.14 +//
1.15 +
1.16 +#include "nsScrollbarFrame.h"
1.17 +#include "nsScrollbarButtonFrame.h"
1.18 +#include "nsGkAtoms.h"
1.19 +#include "nsIScrollableFrame.h"
1.20 +#include "nsIScrollbarMediator.h"
1.21 +#include "mozilla/LookAndFeel.h"
1.22 +#include "nsThemeConstants.h"
1.23 +#include "nsRenderingContext.h"
1.24 +#include "nsIContent.h"
1.25 +
1.26 +using namespace mozilla;
1.27 +
1.28 +//
1.29 +// NS_NewScrollbarFrame
1.30 +//
1.31 +// Creates a new scrollbar frame and returns it
1.32 +//
1.33 +nsIFrame*
1.34 +NS_NewScrollbarFrame (nsIPresShell* aPresShell, nsStyleContext* aContext)
1.35 +{
1.36 + return new (aPresShell) nsScrollbarFrame (aPresShell, aContext);
1.37 +}
1.38 +
1.39 +NS_IMPL_FRAMEARENA_HELPERS(nsScrollbarFrame)
1.40 +
1.41 +NS_QUERYFRAME_HEAD(nsScrollbarFrame)
1.42 + NS_QUERYFRAME_ENTRY(nsScrollbarFrame)
1.43 +NS_QUERYFRAME_TAIL_INHERITING(nsBoxFrame)
1.44 +
1.45 +void
1.46 +nsScrollbarFrame::Init(nsIContent* aContent,
1.47 + nsIFrame* aParent,
1.48 + nsIFrame* aPrevInFlow)
1.49 +{
1.50 + nsBoxFrame::Init(aContent, aParent, aPrevInFlow);
1.51 +
1.52 + // We want to be a reflow root since we use reflows to move the
1.53 + // slider. Any reflow inside the scrollbar frame will be a reflow to
1.54 + // move the slider and will thus not change anything outside of the
1.55 + // scrollbar or change the size of the scrollbar frame.
1.56 + mState |= NS_FRAME_REFLOW_ROOT;
1.57 +}
1.58 +
1.59 +nsresult
1.60 +nsScrollbarFrame::Reflow(nsPresContext* aPresContext,
1.61 + nsHTMLReflowMetrics& aDesiredSize,
1.62 + const nsHTMLReflowState& aReflowState,
1.63 + nsReflowStatus& aStatus)
1.64 +{
1.65 + nsresult rv = nsBoxFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
1.66 + NS_ENSURE_SUCCESS(rv, rv);
1.67 +
1.68 + // nsGfxScrollFrame may have told us to shrink to nothing. If so, make sure our
1.69 + // desired size agrees.
1.70 + if (aReflowState.AvailableWidth() == 0) {
1.71 + aDesiredSize.Width() = 0;
1.72 + }
1.73 + if (aReflowState.AvailableHeight() == 0) {
1.74 + aDesiredSize.Height() = 0;
1.75 + }
1.76 +
1.77 + return NS_OK;
1.78 +}
1.79 +
1.80 +nsIAtom*
1.81 +nsScrollbarFrame::GetType() const
1.82 +{
1.83 + return nsGkAtoms::scrollbarFrame;
1.84 +}
1.85 +
1.86 +nsresult
1.87 +nsScrollbarFrame::AttributeChanged(int32_t aNameSpaceID,
1.88 + nsIAtom* aAttribute,
1.89 + int32_t aModType)
1.90 +{
1.91 + nsresult rv = nsBoxFrame::AttributeChanged(aNameSpaceID, aAttribute,
1.92 + aModType);
1.93 +
1.94 + // if the current position changes, notify any nsGfxScrollFrame
1.95 + // parent we may have
1.96 + if (aAttribute != nsGkAtoms::curpos)
1.97 + return rv;
1.98 +
1.99 + nsIScrollableFrame* scrollable = do_QueryFrame(GetParent());
1.100 + if (!scrollable)
1.101 + return rv;
1.102 +
1.103 + nsCOMPtr<nsIContent> kungFuDeathGrip(mContent);
1.104 + scrollable->CurPosAttributeChanged(mContent);
1.105 + return rv;
1.106 +}
1.107 +
1.108 +NS_IMETHODIMP
1.109 +nsScrollbarFrame::HandlePress(nsPresContext* aPresContext,
1.110 + WidgetGUIEvent* aEvent,
1.111 + nsEventStatus* aEventStatus)
1.112 +{
1.113 + return NS_OK;
1.114 +}
1.115 +
1.116 +NS_IMETHODIMP
1.117 +nsScrollbarFrame::HandleMultiplePress(nsPresContext* aPresContext,
1.118 + WidgetGUIEvent* aEvent,
1.119 + nsEventStatus* aEventStatus,
1.120 + bool aControlHeld)
1.121 +{
1.122 + return NS_OK;
1.123 +}
1.124 +
1.125 +NS_IMETHODIMP
1.126 +nsScrollbarFrame::HandleDrag(nsPresContext* aPresContext,
1.127 + WidgetGUIEvent* aEvent,
1.128 + nsEventStatus* aEventStatus)
1.129 +{
1.130 + return NS_OK;
1.131 +}
1.132 +
1.133 +NS_IMETHODIMP
1.134 +nsScrollbarFrame::HandleRelease(nsPresContext* aPresContext,
1.135 + WidgetGUIEvent* aEvent,
1.136 + nsEventStatus* aEventStatus)
1.137 +{
1.138 + return NS_OK;
1.139 +}
1.140 +
1.141 +void
1.142 +nsScrollbarFrame::SetScrollbarMediatorContent(nsIContent* aMediator)
1.143 +{
1.144 + mScrollbarMediator = aMediator;
1.145 +}
1.146 +
1.147 +nsIScrollbarMediator*
1.148 +nsScrollbarFrame::GetScrollbarMediator()
1.149 +{
1.150 + if (!mScrollbarMediator)
1.151 + return nullptr;
1.152 + nsIFrame* f = mScrollbarMediator->GetPrimaryFrame();
1.153 +
1.154 + // check if the frame is a scroll frame. If so, get the scrollable frame
1.155 + // inside it.
1.156 + nsIScrollableFrame* scrollFrame = do_QueryFrame(f);
1.157 + if (scrollFrame) {
1.158 + f = scrollFrame->GetScrolledFrame();
1.159 + }
1.160 +
1.161 + nsIScrollbarMediator* sbm = do_QueryFrame(f);
1.162 + return sbm;
1.163 +}
1.164 +
1.165 +nsresult
1.166 +nsScrollbarFrame::GetMargin(nsMargin& aMargin)
1.167 +{
1.168 + aMargin.SizeTo(0,0,0,0);
1.169 +
1.170 + if (LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars) != 0) {
1.171 + nsPresContext* presContext = PresContext();
1.172 + nsITheme* theme = presContext->GetTheme();
1.173 + if (theme) {
1.174 + nsIntSize size;
1.175 + bool isOverridable;
1.176 + nsRefPtr<nsRenderingContext> rc =
1.177 + presContext->PresShell()->CreateReferenceRenderingContext();
1.178 + theme->GetMinimumWidgetSize(rc, this, NS_THEME_SCROLLBAR, &size,
1.179 + &isOverridable);
1.180 + if (IsHorizontal()) {
1.181 + aMargin.top = -presContext->DevPixelsToAppUnits(size.height);
1.182 + }
1.183 + else {
1.184 + if (StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
1.185 + aMargin.right = -presContext->DevPixelsToAppUnits(size.width);
1.186 + }
1.187 + else {
1.188 + aMargin.left = -presContext->DevPixelsToAppUnits(size.width);
1.189 + }
1.190 + }
1.191 + return NS_OK;
1.192 + }
1.193 + }
1.194 +
1.195 + return nsBox::GetMargin(aMargin);
1.196 +}
