1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/xul/nsGroupBoxFrame.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,244 @@
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 +// YY need to pass isMultiple before create called
1.10 +
1.11 +#include "nsBoxFrame.h"
1.12 +#include "nsCSSRendering.h"
1.13 +#include "nsRenderingContext.h"
1.14 +#include "nsStyleContext.h"
1.15 +#include "nsDisplayList.h"
1.16 +
1.17 +class nsGroupBoxFrame : public nsBoxFrame {
1.18 +public:
1.19 + NS_DECL_FRAMEARENA_HELPERS
1.20 +
1.21 + nsGroupBoxFrame(nsIPresShell* aShell, nsStyleContext* aContext):
1.22 + nsBoxFrame(aShell, aContext) {}
1.23 +
1.24 + virtual nsresult GetBorderAndPadding(nsMargin& aBorderAndPadding);
1.25 +
1.26 + virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
1.27 + const nsRect& aDirtyRect,
1.28 + const nsDisplayListSet& aLists) MOZ_OVERRIDE;
1.29 +
1.30 +#ifdef DEBUG_FRAME_DUMP
1.31 + virtual nsresult GetFrameName(nsAString& aResult) const {
1.32 + return MakeFrameName(NS_LITERAL_STRING("GroupBoxFrame"), aResult);
1.33 + }
1.34 +#endif
1.35 +
1.36 + virtual bool HonorPrintBackgroundSettings() { return false; }
1.37 +
1.38 + void PaintBorderBackground(nsRenderingContext& aRenderingContext,
1.39 + nsPoint aPt, const nsRect& aDirtyRect);
1.40 +
1.41 + // make sure we our kids get our orient and align instead of us.
1.42 + // our child box has no content node so it will search for a parent with one.
1.43 + // that will be us.
1.44 + virtual void GetInitialOrientation(bool& aHorizontal) { aHorizontal = false; }
1.45 + virtual bool GetInitialHAlignment(Halignment& aHalign) { aHalign = hAlign_Left; return true; }
1.46 + virtual bool GetInitialVAlignment(Valignment& aValign) { aValign = vAlign_Top; return true; }
1.47 + virtual bool GetInitialAutoStretch(bool& aStretch) { aStretch = true; return true; }
1.48 +
1.49 + nsIFrame* GetCaptionBox(nsPresContext* aPresContext, nsRect& aCaptionRect);
1.50 +};
1.51 +
1.52 +/*
1.53 +class nsGroupBoxInnerFrame : public nsBoxFrame {
1.54 +public:
1.55 +
1.56 + nsGroupBoxInnerFrame(nsIPresShell* aShell, nsStyleContext* aContext):
1.57 + nsBoxFrame(aShell, aContext) {}
1.58 +
1.59 +
1.60 +#ifdef DEBUG_FRAME_DUMP
1.61 + NS_IMETHOD GetFrameName(nsString& aResult) const {
1.62 + return MakeFrameName("GroupBoxFrameInner", aResult);
1.63 + }
1.64 +#endif
1.65 +
1.66 + // we are always flexible
1.67 + virtual bool GetDefaultFlex(int32_t& aFlex) { aFlex = 1; return true; }
1.68 +
1.69 +};
1.70 +*/
1.71 +
1.72 +nsIFrame*
1.73 +NS_NewGroupBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
1.74 +{
1.75 + return new (aPresShell) nsGroupBoxFrame(aPresShell, aContext);
1.76 +}
1.77 +
1.78 +NS_IMPL_FRAMEARENA_HELPERS(nsGroupBoxFrame)
1.79 +
1.80 +class nsDisplayXULGroupBackground : public nsDisplayItem {
1.81 +public:
1.82 + nsDisplayXULGroupBackground(nsDisplayListBuilder* aBuilder,
1.83 + nsGroupBoxFrame* aFrame) :
1.84 + nsDisplayItem(aBuilder, aFrame) {
1.85 + MOZ_COUNT_CTOR(nsDisplayXULGroupBackground);
1.86 + }
1.87 +#ifdef NS_BUILD_REFCNT_LOGGING
1.88 + virtual ~nsDisplayXULGroupBackground() {
1.89 + MOZ_COUNT_DTOR(nsDisplayXULGroupBackground);
1.90 + }
1.91 +#endif
1.92 +
1.93 + virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
1.94 + HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames) {
1.95 + aOutFrames->AppendElement(mFrame);
1.96 + }
1.97 + virtual void Paint(nsDisplayListBuilder* aBuilder,
1.98 + nsRenderingContext* aCtx);
1.99 + NS_DISPLAY_DECL_NAME("XULGroupBackground", TYPE_XUL_GROUP_BACKGROUND)
1.100 +};
1.101 +
1.102 +void
1.103 +nsDisplayXULGroupBackground::Paint(nsDisplayListBuilder* aBuilder,
1.104 + nsRenderingContext* aCtx)
1.105 +{
1.106 + static_cast<nsGroupBoxFrame*>(mFrame)->
1.107 + PaintBorderBackground(*aCtx, ToReferenceFrame(), mVisibleRect);
1.108 +}
1.109 +
1.110 +void
1.111 +nsGroupBoxFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
1.112 + const nsRect& aDirtyRect,
1.113 + const nsDisplayListSet& aLists)
1.114 +{
1.115 + // Paint our background and border
1.116 + if (IsVisibleForPainting(aBuilder)) {
1.117 + aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
1.118 + nsDisplayXULGroupBackground(aBuilder, this));
1.119 +
1.120 + DisplayOutline(aBuilder, aLists);
1.121 + }
1.122 +
1.123 + BuildDisplayListForChildren(aBuilder, aDirtyRect, aLists);
1.124 +}
1.125 +
1.126 +void
1.127 +nsGroupBoxFrame::PaintBorderBackground(nsRenderingContext& aRenderingContext,
1.128 + nsPoint aPt, const nsRect& aDirtyRect) {
1.129 + int skipSides = 0;
1.130 + const nsStyleBorder* borderStyleData = StyleBorder();
1.131 + const nsMargin& border = borderStyleData->GetComputedBorder();
1.132 + nscoord yoff = 0;
1.133 + nsPresContext* presContext = PresContext();
1.134 +
1.135 + nsRect groupRect;
1.136 + nsIFrame* groupBox = GetCaptionBox(presContext, groupRect);
1.137 +
1.138 + if (groupBox) {
1.139 + // if the border is smaller than the legend. Move the border down
1.140 + // to be centered on the legend.
1.141 + nsMargin groupMargin;
1.142 + groupBox->StyleMargin()->GetMargin(groupMargin);
1.143 + groupRect.Inflate(groupMargin);
1.144 +
1.145 + if (border.top < groupRect.height)
1.146 + yoff = (groupRect.height - border.top)/2 + groupRect.y;
1.147 + }
1.148 +
1.149 + nsRect rect(aPt.x, aPt.y + yoff, mRect.width, mRect.height - yoff);
1.150 +
1.151 + groupRect += aPt;
1.152 +
1.153 + nsCSSRendering::PaintBackground(presContext, aRenderingContext, this,
1.154 + aDirtyRect, rect,
1.155 + nsCSSRendering::PAINTBG_SYNC_DECODE_IMAGES);
1.156 +
1.157 + if (groupBox) {
1.158 +
1.159 + // we should probably use PaintBorderEdges to do this but for now just use clipping
1.160 + // to achieve the same effect.
1.161 +
1.162 + // draw left side
1.163 + nsRect clipRect(rect);
1.164 + clipRect.width = groupRect.x - rect.x;
1.165 + clipRect.height = border.top;
1.166 +
1.167 + aRenderingContext.PushState();
1.168 + aRenderingContext.IntersectClip(clipRect);
1.169 + nsCSSRendering::PaintBorder(presContext, aRenderingContext, this,
1.170 + aDirtyRect, rect, mStyleContext, skipSides);
1.171 +
1.172 + aRenderingContext.PopState();
1.173 +
1.174 +
1.175 + // draw right side
1.176 + clipRect = rect;
1.177 + clipRect.x = groupRect.XMost();
1.178 + clipRect.width = rect.XMost() - groupRect.XMost();
1.179 + clipRect.height = border.top;
1.180 +
1.181 + aRenderingContext.PushState();
1.182 + aRenderingContext.IntersectClip(clipRect);
1.183 + nsCSSRendering::PaintBorder(presContext, aRenderingContext, this,
1.184 + aDirtyRect, rect, mStyleContext, skipSides);
1.185 +
1.186 + aRenderingContext.PopState();
1.187 +
1.188 +
1.189 +
1.190 + // draw bottom
1.191 +
1.192 + clipRect = rect;
1.193 + clipRect.y += border.top;
1.194 + clipRect.height = mRect.height - (yoff + border.top);
1.195 +
1.196 + aRenderingContext.PushState();
1.197 + aRenderingContext.IntersectClip(clipRect);
1.198 + nsCSSRendering::PaintBorder(presContext, aRenderingContext, this,
1.199 + aDirtyRect, rect, mStyleContext, skipSides);
1.200 +
1.201 + aRenderingContext.PopState();
1.202 +
1.203 + } else {
1.204 + nsCSSRendering::PaintBorder(presContext, aRenderingContext, this,
1.205 + aDirtyRect, nsRect(aPt, GetSize()),
1.206 + mStyleContext, skipSides);
1.207 + }
1.208 +}
1.209 +
1.210 +nsIFrame*
1.211 +nsGroupBoxFrame::GetCaptionBox(nsPresContext* aPresContext, nsRect& aCaptionRect)
1.212 +{
1.213 + // first child is our grouped area
1.214 + nsIFrame* box = GetChildBox();
1.215 +
1.216 + // no area fail.
1.217 + if (!box)
1.218 + return nullptr;
1.219 +
1.220 + // get the first child in the grouped area, that is the caption
1.221 + box = box->GetChildBox();
1.222 +
1.223 + // nothing in the area? fail
1.224 + if (!box)
1.225 + return nullptr;
1.226 +
1.227 + // now get the caption itself. It is in the caption frame.
1.228 + nsIFrame* child = box->GetChildBox();
1.229 +
1.230 + if (child) {
1.231 + // convert to our coordinates.
1.232 + nsRect parentRect(box->GetRect());
1.233 + aCaptionRect = child->GetRect();
1.234 + aCaptionRect.x += parentRect.x;
1.235 + aCaptionRect.y += parentRect.y;
1.236 + }
1.237 +
1.238 + return child;
1.239 +}
1.240 +
1.241 +nsresult
1.242 +nsGroupBoxFrame::GetBorderAndPadding(nsMargin& aBorderAndPadding)
1.243 +{
1.244 + aBorderAndPadding.SizeTo(0,0,0,0);
1.245 + return NS_OK;
1.246 +}
1.247 +
