michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: // YY need to pass isMultiple before create called
michael@0: 
michael@0: #include "nsBoxFrame.h"
michael@0: #include "nsCSSRendering.h"
michael@0: #include "nsRenderingContext.h"
michael@0: #include "nsStyleContext.h"
michael@0: #include "nsDisplayList.h"
michael@0: 
michael@0: class nsGroupBoxFrame : public nsBoxFrame {
michael@0: public:
michael@0:   NS_DECL_FRAMEARENA_HELPERS
michael@0: 
michael@0:   nsGroupBoxFrame(nsIPresShell* aShell, nsStyleContext* aContext):
michael@0:     nsBoxFrame(aShell, aContext) {}
michael@0: 
michael@0:   virtual nsresult GetBorderAndPadding(nsMargin& aBorderAndPadding);
michael@0: 
michael@0:   virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
michael@0:                                 const nsRect&           aDirtyRect,
michael@0:                                 const nsDisplayListSet& aLists) MOZ_OVERRIDE;
michael@0: 
michael@0: #ifdef DEBUG_FRAME_DUMP
michael@0:   virtual nsresult GetFrameName(nsAString& aResult) const {
michael@0:     return MakeFrameName(NS_LITERAL_STRING("GroupBoxFrame"), aResult);
michael@0:   }
michael@0: #endif
michael@0: 
michael@0:   virtual bool HonorPrintBackgroundSettings() { return false; }
michael@0: 
michael@0:   void PaintBorderBackground(nsRenderingContext& aRenderingContext,
michael@0:       nsPoint aPt, const nsRect& aDirtyRect);
michael@0: 
michael@0:   // make sure we our kids get our orient and align instead of us.
michael@0:   // our child box has no content node so it will search for a parent with one.
michael@0:   // that will be us.
michael@0:   virtual void GetInitialOrientation(bool& aHorizontal) { aHorizontal = false; }
michael@0:   virtual bool GetInitialHAlignment(Halignment& aHalign)  { aHalign = hAlign_Left; return true; } 
michael@0:   virtual bool GetInitialVAlignment(Valignment& aValign)  { aValign = vAlign_Top; return true; } 
michael@0:   virtual bool GetInitialAutoStretch(bool& aStretch)    { aStretch = true; return true; } 
michael@0: 
michael@0:   nsIFrame* GetCaptionBox(nsPresContext* aPresContext, nsRect& aCaptionRect);
michael@0: };
michael@0: 
michael@0: /*
michael@0: class nsGroupBoxInnerFrame : public nsBoxFrame {
michael@0: public:
michael@0: 
michael@0:     nsGroupBoxInnerFrame(nsIPresShell* aShell, nsStyleContext* aContext):
michael@0:       nsBoxFrame(aShell, aContext) {}
michael@0: 
michael@0: 
michael@0: #ifdef DEBUG_FRAME_DUMP
michael@0:   NS_IMETHOD GetFrameName(nsString& aResult) const {
michael@0:     return MakeFrameName("GroupBoxFrameInner", aResult);
michael@0:   }
michael@0: #endif
michael@0:   
michael@0:   // we are always flexible
michael@0:   virtual bool GetDefaultFlex(int32_t& aFlex) { aFlex = 1; return true; }
michael@0: 
michael@0: };
michael@0: */
michael@0: 
michael@0: nsIFrame*
michael@0: NS_NewGroupBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
michael@0: {
michael@0:   return new (aPresShell) nsGroupBoxFrame(aPresShell, aContext);
michael@0: }
michael@0: 
michael@0: NS_IMPL_FRAMEARENA_HELPERS(nsGroupBoxFrame)
michael@0: 
michael@0: class nsDisplayXULGroupBackground : public nsDisplayItem {
michael@0: public:
michael@0:   nsDisplayXULGroupBackground(nsDisplayListBuilder* aBuilder,
michael@0:                               nsGroupBoxFrame* aFrame) :
michael@0:     nsDisplayItem(aBuilder, aFrame) {
michael@0:     MOZ_COUNT_CTOR(nsDisplayXULGroupBackground);
michael@0:   }
michael@0: #ifdef NS_BUILD_REFCNT_LOGGING
michael@0:   virtual ~nsDisplayXULGroupBackground() {
michael@0:     MOZ_COUNT_DTOR(nsDisplayXULGroupBackground);
michael@0:   }
michael@0: #endif
michael@0: 
michael@0:   virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
michael@0:                        HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames) {
michael@0:     aOutFrames->AppendElement(mFrame);
michael@0:   }
michael@0:   virtual void Paint(nsDisplayListBuilder* aBuilder,
michael@0:                      nsRenderingContext* aCtx);
michael@0:   NS_DISPLAY_DECL_NAME("XULGroupBackground", TYPE_XUL_GROUP_BACKGROUND)
michael@0: };
michael@0: 
michael@0: void
michael@0: nsDisplayXULGroupBackground::Paint(nsDisplayListBuilder* aBuilder,
michael@0:                                    nsRenderingContext* aCtx)
michael@0: {
michael@0:   static_cast<nsGroupBoxFrame*>(mFrame)->
michael@0:     PaintBorderBackground(*aCtx, ToReferenceFrame(), mVisibleRect);
michael@0: }
michael@0: 
michael@0: void
michael@0: nsGroupBoxFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
michael@0:                                   const nsRect&           aDirtyRect,
michael@0:                                   const nsDisplayListSet& aLists)
michael@0: {
michael@0:   // Paint our background and border
michael@0:   if (IsVisibleForPainting(aBuilder)) {
michael@0:     aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
michael@0:       nsDisplayXULGroupBackground(aBuilder, this));
michael@0:     
michael@0:     DisplayOutline(aBuilder, aLists);
michael@0:   }
michael@0: 
michael@0:   BuildDisplayListForChildren(aBuilder, aDirtyRect, aLists);
michael@0: }
michael@0: 
michael@0: void
michael@0: nsGroupBoxFrame::PaintBorderBackground(nsRenderingContext& aRenderingContext,
michael@0:     nsPoint aPt, const nsRect& aDirtyRect) {
michael@0:   int skipSides = 0;
michael@0:   const nsStyleBorder* borderStyleData = StyleBorder();
michael@0:   const nsMargin& border = borderStyleData->GetComputedBorder();
michael@0:   nscoord yoff = 0;
michael@0:   nsPresContext* presContext = PresContext();
michael@0: 
michael@0:   nsRect groupRect;
michael@0:   nsIFrame* groupBox = GetCaptionBox(presContext, groupRect);
michael@0: 
michael@0:   if (groupBox) {        
michael@0:     // if the border is smaller than the legend. Move the border down
michael@0:     // to be centered on the legend. 
michael@0:     nsMargin groupMargin;
michael@0:     groupBox->StyleMargin()->GetMargin(groupMargin);
michael@0:     groupRect.Inflate(groupMargin);
michael@0:  
michael@0:     if (border.top < groupRect.height)
michael@0:         yoff = (groupRect.height - border.top)/2 + groupRect.y;
michael@0:   }
michael@0: 
michael@0:   nsRect rect(aPt.x, aPt.y + yoff, mRect.width, mRect.height - yoff);
michael@0: 
michael@0:   groupRect += aPt;
michael@0: 
michael@0:   nsCSSRendering::PaintBackground(presContext, aRenderingContext, this,
michael@0:                                   aDirtyRect, rect,
michael@0:                                   nsCSSRendering::PAINTBG_SYNC_DECODE_IMAGES);
michael@0: 
michael@0:   if (groupBox) {
michael@0: 
michael@0:     // we should probably use PaintBorderEdges to do this but for now just use clipping
michael@0:     // to achieve the same effect.
michael@0: 
michael@0:     // draw left side
michael@0:     nsRect clipRect(rect);
michael@0:     clipRect.width = groupRect.x - rect.x;
michael@0:     clipRect.height = border.top;
michael@0: 
michael@0:     aRenderingContext.PushState();
michael@0:     aRenderingContext.IntersectClip(clipRect);
michael@0:     nsCSSRendering::PaintBorder(presContext, aRenderingContext, this,
michael@0:                                 aDirtyRect, rect, mStyleContext, skipSides);
michael@0: 
michael@0:     aRenderingContext.PopState();
michael@0: 
michael@0: 
michael@0:     // draw right side
michael@0:     clipRect = rect;
michael@0:     clipRect.x = groupRect.XMost();
michael@0:     clipRect.width = rect.XMost() - groupRect.XMost();
michael@0:     clipRect.height = border.top;
michael@0: 
michael@0:     aRenderingContext.PushState();
michael@0:     aRenderingContext.IntersectClip(clipRect);
michael@0:     nsCSSRendering::PaintBorder(presContext, aRenderingContext, this,
michael@0:                                 aDirtyRect, rect, mStyleContext, skipSides);
michael@0: 
michael@0:     aRenderingContext.PopState();
michael@0: 
michael@0:     
michael@0:   
michael@0:     // draw bottom
michael@0: 
michael@0:     clipRect = rect;
michael@0:     clipRect.y += border.top;
michael@0:     clipRect.height = mRect.height - (yoff + border.top);
michael@0:   
michael@0:     aRenderingContext.PushState();
michael@0:     aRenderingContext.IntersectClip(clipRect);
michael@0:     nsCSSRendering::PaintBorder(presContext, aRenderingContext, this,
michael@0:                                 aDirtyRect, rect, mStyleContext, skipSides);
michael@0: 
michael@0:     aRenderingContext.PopState();
michael@0:     
michael@0:   } else {
michael@0:     nsCSSRendering::PaintBorder(presContext, aRenderingContext, this,
michael@0:                                 aDirtyRect, nsRect(aPt, GetSize()),
michael@0:                                 mStyleContext, skipSides);
michael@0:   }
michael@0: }
michael@0: 
michael@0: nsIFrame*
michael@0: nsGroupBoxFrame::GetCaptionBox(nsPresContext* aPresContext, nsRect& aCaptionRect)
michael@0: {
michael@0:     // first child is our grouped area
michael@0:     nsIFrame* box = GetChildBox();
michael@0: 
michael@0:     // no area fail.
michael@0:     if (!box)
michael@0:       return nullptr;
michael@0: 
michael@0:     // get the first child in the grouped area, that is the caption
michael@0:     box = box->GetChildBox();
michael@0: 
michael@0:     // nothing in the area? fail
michael@0:     if (!box)
michael@0:       return nullptr;
michael@0: 
michael@0:     // now get the caption itself. It is in the caption frame.
michael@0:     nsIFrame* child = box->GetChildBox();
michael@0: 
michael@0:     if (child) {
michael@0:        // convert to our coordinates.
michael@0:        nsRect parentRect(box->GetRect());
michael@0:        aCaptionRect = child->GetRect();
michael@0:        aCaptionRect.x += parentRect.x;
michael@0:        aCaptionRect.y += parentRect.y;
michael@0:     }
michael@0: 
michael@0:     return child;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsGroupBoxFrame::GetBorderAndPadding(nsMargin& aBorderAndPadding)
michael@0: {
michael@0:   aBorderAndPadding.SizeTo(0,0,0,0);
michael@0:   return NS_OK;
michael@0: }
michael@0: