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added body link color support

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This commit is contained in:
peterl@netscape.com
1998-07-25 01:20:48 +00:00
parent 42d83797d3
commit 61aa84930a
4 changed files with 478 additions and 10 deletions
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161
content/html/style/src/nsHTMLStyleSheet.cpp
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@@ -24,12 +24,59 @@
#include "nsIHTMLContent.h"
#include "nsIStyleRule.h"
#include "nsIFrame.h"
#include "nsIStyleContext.h"
#include "nsHTMLAtoms.h"
#include "nsIPresContext.h"
#include "nsILinkHandler.h"
#include "nsIDocument.h"
static NS_DEFINE_IID(kIHTMLStyleSheetIID, NS_IHTML_STYLE_SHEET_IID);
static NS_DEFINE_IID(kIStyleSheetIID, NS_ISTYLE_SHEET_IID);
static NS_DEFINE_IID(kIStyleRuleIID, NS_ISTYLE_RULE_IID);
static NS_DEFINE_IID(kIHTMLContentIID, NS_IHTMLCONTENT_IID);
class HTMLAnchorRule : public nsIStyleRule {
public:
NS_DECL_ISUPPORTS
virtual PRBool Equals(const nsIStyleRule* aRule) const;
virtual PRUint32 HashValue(void) const;
virtual void MapStyleInto(nsIStyleContext* aContext, nsIPresContext* aPresContext);
virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const;
nscolor mColor;
};
NS_IMPL_ISUPPORTS(HTMLAnchorRule, kIStyleRuleIID);
PRBool HTMLAnchorRule::Equals(const nsIStyleRule* aRule) const
{
return PRBool(this == aRule);
}
PRUint32 HTMLAnchorRule::HashValue(void) const
{
return (PRUint32)(mColor);
}
void HTMLAnchorRule::MapStyleInto(nsIStyleContext* aContext, nsIPresContext* aPresContext)
{
nsStyleColor* styleColor = (nsStyleColor*)(aContext->GetMutableStyleData(eStyleStruct_Color));
if (nsnull != styleColor) {
styleColor->mColor = mColor;
}
}
void HTMLAnchorRule::List(FILE* out, PRInt32 aIndent) const
{
}
class HTMLStyleSheetImpl : public nsIHTMLStyleSheet {
public:
void* operator new(size_t size);
@@ -54,6 +101,10 @@ public:
virtual nsIURL* GetURL(void);
NS_IMETHOD SetLinkColor(nscolor aColor);
NS_IMETHOD SetActiveLinkColor(nscolor aColor);
NS_IMETHOD SetVisitedLinkColor(nscolor aColor);
// XXX style rule enumerations
virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const;
@@ -70,7 +121,10 @@ protected:
PRUint32 mInHeap : 1;
PRUint32 mRefCnt : 31;
nsIURL* mURL;
nsIURL* mURL;
HTMLAnchorRule* mLinkRule;
HTMLAnchorRule* mVisitedRule;
HTMLAnchorRule* mActiveRule;
};
@@ -112,7 +166,10 @@ void HTMLStyleSheetImpl::operator delete(void* ptr)
HTMLStyleSheetImpl::HTMLStyleSheetImpl(nsIURL* aURL)
: nsIHTMLStyleSheet(),
mURL(aURL)
mURL(aURL),
mLinkRule(nsnull),
mVisitedRule(nsnull),
mActiveRule(nsnull)
{
NS_INIT_REFCNT();
NS_ADDREF(mURL);
@@ -121,6 +178,9 @@ HTMLStyleSheetImpl::HTMLStyleSheetImpl(nsIURL* aURL)
HTMLStyleSheetImpl::~HTMLStyleSheetImpl()
{
NS_RELEASE(mURL);
NS_IF_RELEASE(mLinkRule);
NS_IF_RELEASE(mVisitedRule);
NS_IF_RELEASE(mActiveRule);
}
NS_IMPL_ADDREF(HTMLStyleSheetImpl)
@@ -171,8 +231,63 @@ PRInt32 HTMLStyleSheetImpl::RulesMatching(nsIPresContext* aPresContext,
if (aContent != parentContent) { // if not a pseudo frame...
nsIHTMLContent* htmlContent;
// just get the one and only style rule from the content
if (NS_OK == aContent->QueryInterface(kIHTMLContentIID, (void**)&htmlContent)) {
// if we have anchor colors, check if this is an anchor with an href
if ((nsnull != mLinkRule) || (nsnull != mVisitedRule) || (nsnull != mActiveRule)) {
nsIAtom* tag = htmlContent->GetTag();
if (tag == nsHTMLAtoms::a) {
// test link state
nsILinkHandler* linkHandler;
if ((NS_OK == aPresContext->GetLinkHandler(&linkHandler)) &&
(nsnull != linkHandler)) {
nsAutoString base, href; // XXX base??
nsContentAttr attrState = htmlContent->GetAttribute("href", href);
if (eContentAttr_HasValue == attrState) {
nsIURL* docURL = nsnull;
nsIDocument* doc = nsnull;
aContent->GetDocument(doc);
if (nsnull != doc) {
docURL = doc->GetDocumentURL();
NS_RELEASE(doc);
}
nsAutoString absURLSpec;
nsresult rv = NS_MakeAbsoluteURL(docURL, base, href, absURLSpec);
NS_IF_RELEASE(docURL);
nsLinkState state;
if (NS_OK == linkHandler->GetLinkState(absURLSpec, state)) {
switch (state) {
case eLinkState_Unvisited:
if (nsnull != mLinkRule) {
aResults->AppendElement(mLinkRule);
matchCount++;
}
break;
case eLinkState_Visited:
if (nsnull != mVisitedRule) {
aResults->AppendElement(mVisitedRule);
matchCount++;
}
break;
case eLinkState_Active:
if (nsnull != mActiveRule) {
aResults->AppendElement(mActiveRule);
matchCount++;
}
break;
}
}
}
NS_RELEASE(linkHandler);
}
}
NS_IF_RELEASE(tag);
}
// just get the one and only style rule from the content
nsIStyleRule* rule = htmlContent->GetStyleRule();
if (nsnull != rule) {
@@ -205,6 +320,46 @@ nsIURL* HTMLStyleSheetImpl::GetURL(void)
return mURL;
}
NS_IMETHODIMP HTMLStyleSheetImpl::SetLinkColor(nscolor aColor)
{
if (nsnull == mLinkRule) {
mLinkRule = new HTMLAnchorRule();
if (nsnull == mLinkRule) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(mLinkRule);
}
mLinkRule->mColor = aColor;
return NS_OK;
}
NS_IMETHODIMP HTMLStyleSheetImpl::SetActiveLinkColor(nscolor aColor)
{
if (nsnull == mActiveRule) {
mActiveRule = new HTMLAnchorRule();
if (nsnull == mActiveRule) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(mActiveRule);
}
mActiveRule->mColor = aColor;
return NS_OK;
}
NS_IMETHODIMP HTMLStyleSheetImpl::SetVisitedLinkColor(nscolor aColor)
{
if (nsnull == mVisitedRule) {
mVisitedRule = new HTMLAnchorRule();
if (nsnull == mVisitedRule) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(mVisitedRule);
}
mVisitedRule->mColor = aColor;
return NS_OK;
}
void HTMLStyleSheetImpl::List(FILE* out, PRInt32 aIndent) const
{
nsAutoString buffer;