The Tor Browser: layout/xul/nsGroupBoxFrame.cpp@925c144e1f1f (annotated)

layout/xul/nsGroupBoxFrame.cpp@925c144e1f1f (annotated)

layout/xul/nsGroupBoxFrame.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.

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

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layout/xul/nsGroupBoxFrame.cpp@925c144e1f1f (annotated)

layout/xul/nsGroupBoxFrame.cpp