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Add typesafe functions (global |GetStyleData|) for accessing style data. b=111883 r=pierre sr=hyatt

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dbaron%fas.harvard.edu 2001-11-28 05:04:23 +00:00
parent 026075a4bd
commit 5720f35dba
2 changed files with 136 additions and 2 deletions
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69
content/shared/public/nsStyleStruct.h
View File

@ -76,6 +76,7 @@ enum nsStyleStructID {
eStyleStruct_Border = 18,
eStyleStruct_Outline = 19,
eStyleStruct_XUL = 20,
eStyleStruct_Min = eStyleStruct_Font,
eStyleStruct_Max = eStyleStruct_XUL,
eStyleStruct_BorderPaddingShortcut = 21 // only for use in GetStyle()
};
@ -112,6 +113,11 @@ enum nsStyleStructID {
// A bit to test whether or not we have any text decorations.
#define NS_STYLE_HAS_TEXT_DECORATIONS 0x200000
#define NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(the_sid) \
static const nsStyleStructID GetStyleStructID() {return the_sid;}
#define NS_GET_STYLESTRUCTID(type) (type::GetStyleStructID())
// The actual structs start here
struct nsStyleStruct {
};
@ -122,6 +128,8 @@ struct nsStyleFont : public nsStyleStruct {
nsStyleFont(void);
~nsStyleFont(void) {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Font)
PRInt32 CalcDifference(const nsStyleFont& aOther) const;
static PRInt32 CalcFontDifference(const nsFont& aFont1, const nsFont& aFont2);
@ -145,6 +153,8 @@ struct nsStyleColor : public nsStyleStruct {
nsStyleColor(const nsStyleColor& aOther);
~nsStyleColor(void) {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Color)
PRInt32 CalcDifference(const nsStyleColor& aOther) const;
void* operator new(size_t sz, nsIPresContext* aContext) {
@ -167,6 +177,8 @@ struct nsStyleBackground : public nsStyleStruct {
nsStyleBackground(const nsStyleBackground& aOther);
~nsStyleBackground() {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Background)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -209,6 +221,8 @@ struct nsStyleMargin: public nsStyleStruct {
nsStyleMargin(const nsStyleMargin& aMargin);
~nsStyleMargin(void) {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Margin)
void* operator new(size_t sz, nsIPresContext* aContext);
void Destroy(nsIPresContext* aContext);
@ -240,6 +254,8 @@ struct nsStylePadding: public nsStyleStruct {
nsStylePadding(const nsStylePadding& aPadding);
~nsStylePadding(void) {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Padding)
void* operator new(size_t sz, nsIPresContext* aContext);
void Destroy(nsIPresContext* aContext);
@ -272,6 +288,8 @@ struct nsStyleBorder: public nsStyleStruct {
nsStyleBorder(const nsStyleBorder& aBorder);
~nsStyleBorder(void) {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Border)
void* operator new(size_t sz, nsIPresContext* aContext);
void Destroy(nsIPresContext* aContext);
@ -366,6 +384,9 @@ struct nsStyleBorderPadding: public nsStyleStruct {
nsStyleBorderPadding(void) { mHasCachedBorderPadding = PR_FALSE; };
~nsStyleBorderPadding(void) {};
// No accessor for this struct, since it's not a real struct. At
// least not for now...
PRBool GetBorderPadding(nsMargin& aBorderPadding) const {
if (mHasCachedBorderPadding) {
aBorderPadding = mCachedBorderPadding;
@ -390,6 +411,8 @@ struct nsStyleOutline: public nsStyleStruct {
nsStyleOutline(const nsStyleOutline& aOutline);
~nsStyleOutline(void) {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Outline)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -472,6 +495,8 @@ struct nsStyleList : public nsStyleStruct {
nsStyleList(const nsStyleList& aStyleList);
~nsStyleList(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_List)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -494,6 +519,8 @@ struct nsStylePosition : public nsStyleStruct {
nsStylePosition(const nsStylePosition& aOther);
~nsStylePosition(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Position)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -523,6 +550,8 @@ struct nsStyleTextReset : public nsStyleStruct {
nsStyleTextReset(const nsStyleTextReset& aOther);
~nsStyleTextReset(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_TextReset)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -548,6 +577,8 @@ struct nsStyleText : public nsStyleStruct {
nsStyleText(const nsStyleText& aOther);
~nsStyleText(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Text)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -579,6 +610,8 @@ struct nsStyleVisibility : public nsStyleStruct {
nsStyleVisibility(const nsStyleVisibility& aVisibility);
~nsStyleVisibility() {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Visibility)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -611,6 +644,8 @@ struct nsStyleDisplay : public nsStyleStruct {
nsStyleDisplay(const nsStyleDisplay& aOther);
~nsStyleDisplay() {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Display)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -662,6 +697,8 @@ struct nsStyleTable: public nsStyleStruct {
nsStyleTable(const nsStyleTable& aOther);
~nsStyleTable(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Table)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -686,6 +723,8 @@ struct nsStyleTableBorder: public nsStyleStruct {
nsStyleTableBorder(const nsStyleTableBorder& aOther);
~nsStyleTableBorder(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_TableBorder)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -735,6 +774,8 @@ struct nsStyleQuotes : public nsStyleStruct {
nsStyleQuotes(const nsStyleQuotes& aQuotes);
~nsStyleQuotes();
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Quotes)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -794,6 +835,8 @@ struct nsStyleContent: public nsStyleStruct {
nsStyleContent(const nsStyleContent& aContent);
~nsStyleContent(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Content)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -931,6 +974,8 @@ struct nsStyleUIReset: public nsStyleStruct {
nsStyleUIReset(const nsStyleUIReset& aOther);
~nsStyleUIReset(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_UIReset)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -953,6 +998,8 @@ struct nsStyleUserInterface: public nsStyleStruct {
nsStyleUserInterface(const nsStyleUserInterface& aOther);
~nsStyleUserInterface(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_UserInterface)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -979,6 +1026,8 @@ struct nsStyleXUL : public nsStyleStruct {
nsStyleXUL(const nsStyleXUL& aSource);
~nsStyleXUL();
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_XUL)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -1051,6 +1100,24 @@ inline nsBorderEdges::nsBorderEdges()
mOutsideEdge = PR_TRUE;
};
// typesafe mechanisms for accessing style data
class nsIFrame;
class nsIStyleContext;
template <class T>
inline void
GetStyleData(nsIFrame* aFrame, const T** aStyleStruct)
{
aFrame->GetStyleData(NS_GET_STYLESTRUCTID(T),
*NS_REINTERPRET_CAST(const nsStyleStruct**, aStyleStruct));
}
template <class T>
inline void
GetStyleData(nsIStyleContext* aStyleContext, const T** aStyleStruct)
{
*aStyleStruct = NS_STATIC_CAST(const T*,
aStyleContext->GetStyleData(NS_GET_STYLESTRUCTID(T)));
}
#endif /* nsStyleStruct_h___ */

69
layout/style/nsStyleStruct.h
View File

@ -76,6 +76,7 @@ enum nsStyleStructID {
eStyleStruct_Border = 18,
eStyleStruct_Outline = 19,
eStyleStruct_XUL = 20,
eStyleStruct_Min = eStyleStruct_Font,
eStyleStruct_Max = eStyleStruct_XUL,
eStyleStruct_BorderPaddingShortcut = 21 // only for use in GetStyle()
};
@ -112,6 +113,11 @@ enum nsStyleStructID {
// A bit to test whether or not we have any text decorations.
#define NS_STYLE_HAS_TEXT_DECORATIONS 0x200000
#define NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(the_sid) \
static const nsStyleStructID GetStyleStructID() {return the_sid;}
#define NS_GET_STYLESTRUCTID(type) (type::GetStyleStructID())
// The actual structs start here
struct nsStyleStruct {
};
@ -122,6 +128,8 @@ struct nsStyleFont : public nsStyleStruct {
nsStyleFont(void);
~nsStyleFont(void) {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Font)
PRInt32 CalcDifference(const nsStyleFont& aOther) const;
static PRInt32 CalcFontDifference(const nsFont& aFont1, const nsFont& aFont2);
@ -145,6 +153,8 @@ struct nsStyleColor : public nsStyleStruct {
nsStyleColor(const nsStyleColor& aOther);
~nsStyleColor(void) {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Color)
PRInt32 CalcDifference(const nsStyleColor& aOther) const;
void* operator new(size_t sz, nsIPresContext* aContext) {
@ -167,6 +177,8 @@ struct nsStyleBackground : public nsStyleStruct {
nsStyleBackground(const nsStyleBackground& aOther);
~nsStyleBackground() {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Background)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -209,6 +221,8 @@ struct nsStyleMargin: public nsStyleStruct {
nsStyleMargin(const nsStyleMargin& aMargin);
~nsStyleMargin(void) {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Margin)
void* operator new(size_t sz, nsIPresContext* aContext);
void Destroy(nsIPresContext* aContext);
@ -240,6 +254,8 @@ struct nsStylePadding: public nsStyleStruct {
nsStylePadding(const nsStylePadding& aPadding);
~nsStylePadding(void) {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Padding)
void* operator new(size_t sz, nsIPresContext* aContext);
void Destroy(nsIPresContext* aContext);
@ -272,6 +288,8 @@ struct nsStyleBorder: public nsStyleStruct {
nsStyleBorder(const nsStyleBorder& aBorder);
~nsStyleBorder(void) {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Border)
void* operator new(size_t sz, nsIPresContext* aContext);
void Destroy(nsIPresContext* aContext);
@ -366,6 +384,9 @@ struct nsStyleBorderPadding: public nsStyleStruct {
nsStyleBorderPadding(void) { mHasCachedBorderPadding = PR_FALSE; };
~nsStyleBorderPadding(void) {};
// No accessor for this struct, since it's not a real struct. At
// least not for now...
PRBool GetBorderPadding(nsMargin& aBorderPadding) const {
if (mHasCachedBorderPadding) {
aBorderPadding = mCachedBorderPadding;
@ -390,6 +411,8 @@ struct nsStyleOutline: public nsStyleStruct {
nsStyleOutline(const nsStyleOutline& aOutline);
~nsStyleOutline(void) {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Outline)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -472,6 +495,8 @@ struct nsStyleList : public nsStyleStruct {
nsStyleList(const nsStyleList& aStyleList);
~nsStyleList(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_List)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -494,6 +519,8 @@ struct nsStylePosition : public nsStyleStruct {
nsStylePosition(const nsStylePosition& aOther);
~nsStylePosition(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Position)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -523,6 +550,8 @@ struct nsStyleTextReset : public nsStyleStruct {
nsStyleTextReset(const nsStyleTextReset& aOther);
~nsStyleTextReset(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_TextReset)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -548,6 +577,8 @@ struct nsStyleText : public nsStyleStruct {
nsStyleText(const nsStyleText& aOther);
~nsStyleText(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Text)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -579,6 +610,8 @@ struct nsStyleVisibility : public nsStyleStruct {
nsStyleVisibility(const nsStyleVisibility& aVisibility);
~nsStyleVisibility() {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Visibility)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -611,6 +644,8 @@ struct nsStyleDisplay : public nsStyleStruct {
nsStyleDisplay(const nsStyleDisplay& aOther);
~nsStyleDisplay() {};
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Display)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -662,6 +697,8 @@ struct nsStyleTable: public nsStyleStruct {
nsStyleTable(const nsStyleTable& aOther);
~nsStyleTable(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Table)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -686,6 +723,8 @@ struct nsStyleTableBorder: public nsStyleStruct {
nsStyleTableBorder(const nsStyleTableBorder& aOther);
~nsStyleTableBorder(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_TableBorder)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -735,6 +774,8 @@ struct nsStyleQuotes : public nsStyleStruct {
nsStyleQuotes(const nsStyleQuotes& aQuotes);
~nsStyleQuotes();
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Quotes)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -794,6 +835,8 @@ struct nsStyleContent: public nsStyleStruct {
nsStyleContent(const nsStyleContent& aContent);
~nsStyleContent(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_Content)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -931,6 +974,8 @@ struct nsStyleUIReset: public nsStyleStruct {
nsStyleUIReset(const nsStyleUIReset& aOther);
~nsStyleUIReset(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_UIReset)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -953,6 +998,8 @@ struct nsStyleUserInterface: public nsStyleStruct {
nsStyleUserInterface(const nsStyleUserInterface& aOther);
~nsStyleUserInterface(void);
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_UserInterface)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -979,6 +1026,8 @@ struct nsStyleXUL : public nsStyleStruct {
nsStyleXUL(const nsStyleXUL& aSource);
~nsStyleXUL();
NS_DEFINE_STATIC_STYLESTRUCTID_ACCESSOR(eStyleStruct_XUL)
void* operator new(size_t sz, nsIPresContext* aContext) {
void* result = nsnull;
aContext->AllocateFromShell(sz, &result);
@ -1051,6 +1100,24 @@ inline nsBorderEdges::nsBorderEdges()
mOutsideEdge = PR_TRUE;
};
// typesafe mechanisms for accessing style data
class nsIFrame;
class nsIStyleContext;
template <class T>
inline void
GetStyleData(nsIFrame* aFrame, const T** aStyleStruct)
{
aFrame->GetStyleData(NS_GET_STYLESTRUCTID(T),
*NS_REINTERPRET_CAST(const nsStyleStruct**, aStyleStruct));
}
template <class T>
inline void
GetStyleData(nsIStyleContext* aStyleContext, const T** aStyleStruct)
{
*aStyleStruct = NS_STATIC_CAST(const T*,
aStyleContext->GetStyleData(NS_GET_STYLESTRUCTID(T)));
}
#endif /* nsStyleStruct_h___ */