layout/forms/nsLegendFrame.cpp

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  37
  38 #include "nsLegendFrame.h"
  39 #include "nsIContent.h"
  40 #include "nsIAtom.h"
  41 #include "nsGenericHTMLElement.h"
  42 #include "nsHTMLParts.h"
  43 #include "nsGkAtoms.h"
  44 #include "nsStyleConsts.h"
  45 #include "nsFormControlFrame.h"
  46
  47 nsIFrame*
  48 NS_NewLegendFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
  49 {
  50 #ifdef DEBUG
  51   const nsStyleDisplay* disp = aContext->GetStyleDisplay();
  52   NS_ASSERTION(!disp->IsAbsolutelyPositioned() && !disp->IsFloating(),
  53                "Legends should not be positioned and should not float");
  54 #endif
  55
  56   nsIFrame* f = new (aPresShell) nsLegendFrame(aContext);
  57   if (f) {
  58     f->AddStateBits(NS_BLOCK_FLOAT_MGR | NS_BLOCK_MARGIN_ROOT);
  59   }
  60   return f;
  61 }
  62
  63 NS_IMPL_FRAMEARENA_HELPERS(nsLegendFrame)
  64
  65 nsIAtom*
  66 nsLegendFrame::GetType() const
  67 {
  68   return nsGkAtoms::legendFrame;
  69 }
  70
  71 void
  72 nsLegendFrame::DestroyFrom(nsIFrame* aDestructRoot)
  73 {
  74   nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), PR_FALSE);
  75   nsBlockFrame::DestroyFrom(aDestructRoot);
  76 }
  77
  78 NS_QUERYFRAME_HEAD(nsLegendFrame)
  79   NS_QUERYFRAME_ENTRY(nsLegendFrame)
  80 NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame)
  81
  82 NS_IMETHODIMP
  83 nsLegendFrame::Reflow(nsPresContext*          aPresContext,
  84                      nsHTMLReflowMetrics&     aDesiredSize,
  85                      const nsHTMLReflowState& aReflowState,
  86                      nsReflowStatus&          aStatus)
  87 {
  88   DO_GLOBAL_REFLOW_COUNT("nsLegendFrame");
  89   DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
  90   if (mState & NS_FRAME_FIRST_REFLOW) {
  91     nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), PR_TRUE);
  92   }
  93   return nsBlockFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
  94 }
  95
  96 // REVIEW: We don't need to override BuildDisplayList, nsBlockFrame will honour
  97 // our visibility setting
  98 PRInt32 nsLegendFrame::GetAlign()
  99 {
 100   PRInt32 intValue = NS_STYLE_TEXT_ALIGN_LEFT;
 101 #ifdef IBMBIDI
 102   if (mParent && NS_STYLE_DIRECTION_RTL == mParent->GetStyleVisibility()->mDirection) {
 103     intValue = NS_STYLE_TEXT_ALIGN_RIGHT;
 104   }
 105 #endif // IBMBIDI
 106
 107   nsGenericHTMLElement *content = nsGenericHTMLElement::FromContent(mContent);
 108
 109   if (content) {
 110     const nsAttrValue* attr = content->GetParsedAttr(nsGkAtoms::align);
 111     if (attr && attr->Type() == nsAttrValue::eEnum) {
 112       intValue = attr->GetEnumValue();
 113     }
 114   }
 115   return intValue;
 116 }
 117
 118 #ifdef NS_DEBUG
 119 NS_IMETHODIMP
 120 nsLegendFrame::GetFrameName(nsAString& aResult) const
 121 {
 122   return MakeFrameName(NS_LITERAL_STRING("Legend"), aResult);
 123 }
 124 #endif