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XBL anonymous content can (in theory) now be built.

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This commit is contained in:
hyatt%netscape.com 2000-01-13 09:43:42 +00:00
parent 6835844d3c
commit 545ae7fd61
4 changed files with 216 additions and 60 deletions
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107
content/xbl/src/nsXBLBinding.cpp
View File

@ -57,14 +57,15 @@ public:
// Internal member functions
protected:
void GetImmediateChild(nsIAtom* aTag, nsIContent** aResult);
void BuildExcludesList(nsISupportsArray** aResult);
PRBool IsInExcludesArray(nsIAtom* aTag);
PRBool IsInExcludesList(nsIAtom* aTag, const nsString& aList);
// MEMBER VARIABLES
protected:
nsCOMPtr<nsIContent> mBinding; // Strong. As long as we're around, the binding can't go away.
nsCOMPtr<nsIContent> mContent; // Strong. Our anonymous content stays around with us.
nsCOMPtr<nsIXBLBinding> mNextBinding; // Strong. The derived binding owns the base class bindings.
nsIContent* mBoundElement; // [WEAK] We have a reference, but we don't own it.
};
// Static initialization
@ -135,7 +136,26 @@ nsXBLBinding::GetAnonymousContent(nsIContent** aResult)
NS_IMETHODIMP
nsXBLBinding::SetAnonymousContent(nsIContent* aParent)
{
// First cache the element.
mContent = aParent;
// Now we need to ensure two things.
// (1) The anonymous content should be fooled into thinking it's in the bound
// element's document.
nsCOMPtr<nsIDocument> doc;
mBoundElement->GetDocument(*getter_AddRefs(doc));
mContent->SetDocument(doc, PR_TRUE);
// (2) The children's parent back pointer should not be to this synthetic root
// but should instead point to the bound element.
PRInt32 childCount;
mContent->ChildCount(childCount);
for (PRInt32 i = 0; i < childCount; i++) {
nsCOMPtr<nsIContent> child;
mContent->ChildAt(i, *getter_AddRefs(child));
child->SetParent(mBoundElement);
}
return NS_OK;
}
@ -157,6 +177,9 @@ nsXBLBinding::SetBindingElement(nsIContent* aElement)
NS_IMETHODIMP
nsXBLBinding::GenerateAnonymousContent(nsIContent* aBoundElement)
{
// Set our bound element.
mBoundElement = aBoundElement;
// Fetch the content element for this binding.
nsCOMPtr<nsIContent> content;
GetImmediateChild(kContentAtom, getter_AddRefs(content));
@ -179,23 +202,16 @@ nsXBLBinding::GenerateAnonymousContent(nsIContent* aBoundElement)
nsAutoString excludes;
content->GetAttribute(kNameSpaceID_None, kExcludesAtom, excludes);
if (excludes == "true") {
// Build the excludes list.
nsCOMPtr<nsISupportsArray> atoms;
BuildExcludesList(getter_AddRefs(atoms));
if (!atoms)
buildContent = PR_FALSE;
else {
// Walk the children and ensure that all of them
// are in the excludes array.
for (PRInt32 i = 0; i < childCount; i++) {
nsCOMPtr<nsIContent> child;
aBoundElement->ChildAt(i, *getter_AddRefs(child));
nsCOMPtr<nsIAtom> tag;
child->GetTag(*getter_AddRefs(tag));
if (!IsInExcludesArray(tag)) {
buildContent = PR_FALSE;
break;
}
// Walk the children and ensure that all of them
// are in the excludes array.
for (PRInt32 i = 0; i < childCount; i++) {
nsCOMPtr<nsIContent> child;
aBoundElement->ChildAt(i, *getter_AddRefs(child));
nsCOMPtr<nsIAtom> tag;
child->GetTag(*getter_AddRefs(tag));
if (!IsInExcludesList(tag, excludes)) {
buildContent = PR_FALSE;
break;
}
}
}
@ -231,20 +247,53 @@ nsXBLBinding::InstallEventHandlers(nsIContent* aBoundElement)
void
nsXBLBinding::GetImmediateChild(nsIAtom* aTag, nsIContent** aResult)
{
// XXX Implement me!
*aResult = nsnull;
PRInt32 childCount;
mBinding->ChildCount(childCount);
for (PRInt32 i = 0; i < childCount; i++) {
nsCOMPtr<nsIContent> child;
mBinding->ChildAt(i, *getter_AddRefs(child));
nsCOMPtr<nsIAtom> tag;
child->GetTag(*getter_AddRefs(tag));
if (aTag == tag.get()) {
*aResult = child;
NS_ADDREF(*aResult);
return;
}
}
return;
}
void
nsXBLBinding::BuildExcludesList(nsISupportsArray** aResult)
{
// XXX Implement me!
}
PRBool
nsXBLBinding::IsInExcludesArray(nsIAtom* aTag)
nsXBLBinding::IsInExcludesList(nsIAtom* aTag, const nsString& aList)
{
// XXX Implement me!
return PR_FALSE;
nsAutoString element;
aTag->ToString(element);
if (aList == "*")
return PR_TRUE; // match _everything_!
PRInt32 indx = aList.Find(element);
if (indx == -1)
return PR_FALSE; // not in the list at all
// okay, now make sure it's not a substring snafu; e.g., 'ur'
// found inside of 'blur'.
if (indx > 0) {
PRUnichar ch = aList[indx - 1];
if (! nsString::IsSpace(ch) && ch != PRUnichar(','))
return PR_FALSE;
}
if (indx + element.Length() < aList.Length()) {
PRUnichar ch = aList[indx + element.Length()];
if (! nsString::IsSpace(ch) && ch != PRUnichar(','))
return PR_FALSE;
}
return PR_TRUE;
}
// Creation Routine ///////////////////////////////////////////////////////////////////////

31
content/xbl/src/nsXBLService.cpp
View File

@ -18,6 +18,7 @@
#include "nsLayoutCID.h"
#include "nsXMLDocument.h"
#include "nsHTMLAtoms.h"
#include "nsSupportsArray.h"
#include "nsIXBLBinding.h"
@ -248,7 +249,35 @@ nsXBLService::LoadBindings(nsIContent* aContent, const nsString& aURL)
NS_IMETHODIMP
nsXBLService::GetContentList(nsIContent* aContent, nsISupportsArray** aResult)
{
// XXX Implement me!
// Iterate over all of the bindings one by one and build up an array
// of anonymous items.
*aResult = nsnull;
nsCOMPtr<nsIBindableContent> bindable = do_QueryInterface(aContent);
if (!bindable)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIXBLBinding> binding;
bindable->GetBinding(getter_AddRefs(binding));
while (binding) {
// Get the anonymous content.
nsCOMPtr<nsIContent> content;
binding->GetAnonymousContent(getter_AddRefs(content));
if (content) {
PRInt32 childCount;
content->ChildCount(childCount);
for (PRInt32 i = 0; i < childCount; i++) {
nsCOMPtr<nsIContent> anonymousChild;
content->ChildAt(i, *getter_AddRefs(anonymousChild));
if (!(*aResult))
NS_NewISupportsArray(aResult); // This call addrefs the array.
(*aResult)->AppendElement(anonymousChild);
}
}
nsCOMPtr<nsIXBLBinding> nextBinding;
binding->GetBaseBinding(getter_AddRefs(nextBinding));
binding = nextBinding;
}
return NS_OK;
}

107
layout/xbl/src/nsXBLBinding.cpp
View File

@ -57,14 +57,15 @@ public:
// Internal member functions
protected:
void GetImmediateChild(nsIAtom* aTag, nsIContent** aResult);
void BuildExcludesList(nsISupportsArray** aResult);
PRBool IsInExcludesArray(nsIAtom* aTag);
PRBool IsInExcludesList(nsIAtom* aTag, const nsString& aList);
// MEMBER VARIABLES
protected:
nsCOMPtr<nsIContent> mBinding; // Strong. As long as we're around, the binding can't go away.
nsCOMPtr<nsIContent> mContent; // Strong. Our anonymous content stays around with us.
nsCOMPtr<nsIXBLBinding> mNextBinding; // Strong. The derived binding owns the base class bindings.
nsIContent* mBoundElement; // [WEAK] We have a reference, but we don't own it.
};
// Static initialization
@ -135,7 +136,26 @@ nsXBLBinding::GetAnonymousContent(nsIContent** aResult)
NS_IMETHODIMP
nsXBLBinding::SetAnonymousContent(nsIContent* aParent)
{
// First cache the element.
mContent = aParent;
// Now we need to ensure two things.
// (1) The anonymous content should be fooled into thinking it's in the bound
// element's document.
nsCOMPtr<nsIDocument> doc;
mBoundElement->GetDocument(*getter_AddRefs(doc));
mContent->SetDocument(doc, PR_TRUE);
// (2) The children's parent back pointer should not be to this synthetic root
// but should instead point to the bound element.
PRInt32 childCount;
mContent->ChildCount(childCount);
for (PRInt32 i = 0; i < childCount; i++) {
nsCOMPtr<nsIContent> child;
mContent->ChildAt(i, *getter_AddRefs(child));
child->SetParent(mBoundElement);
}
return NS_OK;
}
@ -157,6 +177,9 @@ nsXBLBinding::SetBindingElement(nsIContent* aElement)
NS_IMETHODIMP
nsXBLBinding::GenerateAnonymousContent(nsIContent* aBoundElement)
{
// Set our bound element.
mBoundElement = aBoundElement;
// Fetch the content element for this binding.
nsCOMPtr<nsIContent> content;
GetImmediateChild(kContentAtom, getter_AddRefs(content));
@ -179,23 +202,16 @@ nsXBLBinding::GenerateAnonymousContent(nsIContent* aBoundElement)
nsAutoString excludes;
content->GetAttribute(kNameSpaceID_None, kExcludesAtom, excludes);
if (excludes == "true") {
// Build the excludes list.
nsCOMPtr<nsISupportsArray> atoms;
BuildExcludesList(getter_AddRefs(atoms));
if (!atoms)
buildContent = PR_FALSE;
else {
// Walk the children and ensure that all of them
// are in the excludes array.
for (PRInt32 i = 0; i < childCount; i++) {
nsCOMPtr<nsIContent> child;
aBoundElement->ChildAt(i, *getter_AddRefs(child));
nsCOMPtr<nsIAtom> tag;
child->GetTag(*getter_AddRefs(tag));
if (!IsInExcludesArray(tag)) {
buildContent = PR_FALSE;
break;
}
// Walk the children and ensure that all of them
// are in the excludes array.
for (PRInt32 i = 0; i < childCount; i++) {
nsCOMPtr<nsIContent> child;
aBoundElement->ChildAt(i, *getter_AddRefs(child));
nsCOMPtr<nsIAtom> tag;
child->GetTag(*getter_AddRefs(tag));
if (!IsInExcludesList(tag, excludes)) {
buildContent = PR_FALSE;
break;
}
}
}
@ -231,20 +247,53 @@ nsXBLBinding::InstallEventHandlers(nsIContent* aBoundElement)
void
nsXBLBinding::GetImmediateChild(nsIAtom* aTag, nsIContent** aResult)
{
// XXX Implement me!
*aResult = nsnull;
PRInt32 childCount;
mBinding->ChildCount(childCount);
for (PRInt32 i = 0; i < childCount; i++) {
nsCOMPtr<nsIContent> child;
mBinding->ChildAt(i, *getter_AddRefs(child));
nsCOMPtr<nsIAtom> tag;
child->GetTag(*getter_AddRefs(tag));
if (aTag == tag.get()) {
*aResult = child;
NS_ADDREF(*aResult);
return;
}
}
return;
}
void
nsXBLBinding::BuildExcludesList(nsISupportsArray** aResult)
{
// XXX Implement me!
}
PRBool
nsXBLBinding::IsInExcludesArray(nsIAtom* aTag)
nsXBLBinding::IsInExcludesList(nsIAtom* aTag, const nsString& aList)
{
// XXX Implement me!
return PR_FALSE;
nsAutoString element;
aTag->ToString(element);
if (aList == "*")
return PR_TRUE; // match _everything_!
PRInt32 indx = aList.Find(element);
if (indx == -1)
return PR_FALSE; // not in the list at all
// okay, now make sure it's not a substring snafu; e.g., 'ur'
// found inside of 'blur'.
if (indx > 0) {
PRUnichar ch = aList[indx - 1];
if (! nsString::IsSpace(ch) && ch != PRUnichar(','))
return PR_FALSE;
}
if (indx + element.Length() < aList.Length()) {
PRUnichar ch = aList[indx + element.Length()];
if (! nsString::IsSpace(ch) && ch != PRUnichar(','))
return PR_FALSE;
}
return PR_TRUE;
}
// Creation Routine ///////////////////////////////////////////////////////////////////////

31
layout/xbl/src/nsXBLService.cpp
View File

@ -18,6 +18,7 @@
#include "nsLayoutCID.h"
#include "nsXMLDocument.h"
#include "nsHTMLAtoms.h"
#include "nsSupportsArray.h"
#include "nsIXBLBinding.h"
@ -248,7 +249,35 @@ nsXBLService::LoadBindings(nsIContent* aContent, const nsString& aURL)
NS_IMETHODIMP
nsXBLService::GetContentList(nsIContent* aContent, nsISupportsArray** aResult)
{
// XXX Implement me!
// Iterate over all of the bindings one by one and build up an array
// of anonymous items.
*aResult = nsnull;
nsCOMPtr<nsIBindableContent> bindable = do_QueryInterface(aContent);
if (!bindable)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIXBLBinding> binding;
bindable->GetBinding(getter_AddRefs(binding));
while (binding) {
// Get the anonymous content.
nsCOMPtr<nsIContent> content;
binding->GetAnonymousContent(getter_AddRefs(content));
if (content) {
PRInt32 childCount;
content->ChildCount(childCount);
for (PRInt32 i = 0; i < childCount; i++) {
nsCOMPtr<nsIContent> anonymousChild;
content->ChildAt(i, *getter_AddRefs(anonymousChild));
if (!(*aResult))
NS_NewISupportsArray(aResult); // This call addrefs the array.
(*aResult)->AppendElement(anonymousChild);
}
}
nsCOMPtr<nsIXBLBinding> nextBinding;
binding->GetBaseBinding(getter_AddRefs(nextBinding));
binding = nextBinding;
}
return NS_OK;
}