gecko-dev/dom/xbl/nsXBLPrototypeResources.cpp

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5.0 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#include "nsIStyleRuleProcessor.h"
#include "nsIDocument.h"
#include "nsIContent.h"
#include "nsIServiceManager.h"
#include "nsXBLResourceLoader.h"
#include "nsXBLPrototypeResources.h"
#include "nsXBLPrototypeBinding.h"
#include "nsIDocumentObserver.h"
#include "mozilla/css/Loader.h"
#include "nsIURI.h"
#include "nsLayoutCID.h"
#include "nsCSSRuleProcessor.h"
#include "nsStyleSet.h"
#include "mozilla/dom/URL.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/StyleSheet.h"
#include "mozilla/StyleSheetInlines.h"
using namespace mozilla;
using mozilla::dom::IsChromeURI;
nsXBLPrototypeResources::nsXBLPrototypeResources(nsXBLPrototypeBinding* aBinding)
{
MOZ_COUNT_CTOR(nsXBLPrototypeResources);
mLoader = new nsXBLResourceLoader(aBinding, this);
}
nsXBLPrototypeResources::~nsXBLPrototypeResources()
{
MOZ_COUNT_DTOR(nsXBLPrototypeResources);
if (mLoader) {
mLoader->mResources = nullptr;
}
}
void
nsXBLPrototypeResources::AddResource(nsIAtom* aResourceType, const nsAString& aSrc)
{
if (mLoader)
mLoader->AddResource(aResourceType, aSrc);
}
void
nsXBLPrototypeResources::LoadResources(bool* aResult)
{
if (mLoader)
mLoader->LoadResources(aResult);
else
*aResult = true; // All resources loaded.
}
void
nsXBLPrototypeResources::AddResourceListener(nsIContent* aBoundElement)
{
if (mLoader)
mLoader->AddResourceListener(aBoundElement);
}
nsresult
nsXBLPrototypeResources::FlushSkinSheets()
{
if (mStyleSheetList.Length() == 0)
return NS_OK;
nsCOMPtr<nsIDocument> doc =
mLoader->mBinding->XBLDocumentInfo()->GetDocument();
// If doc is null, we're in the process of tearing things down, so just
// return without rebuilding anything.
if (!doc) {
return NS_OK;
}
// We have scoped stylesheets. Reload any chrome stylesheets we
// encounter. (If they aren't skin sheets, it doesn't matter, since
// they'll still be in the chrome cache. Skip inline sheets, which
// skin sheets can't be, and which in any case don't have a usable
// URL to reload.)
nsTArray<RefPtr<StyleSheet>> oldSheets;
oldSheets.SwapElements(mStyleSheetList);
mozilla::css::Loader* cssLoader = doc->CSSLoader();
for (size_t i = 0, count = oldSheets.Length(); i < count; ++i) {
StyleSheet* oldSheet = oldSheets[i];
nsIURI* uri = oldSheet->GetSheetURI();
RefPtr<StyleSheet> newSheet;
if (!oldSheet->IsInline() && IsChromeURI(uri)) {
if (NS_FAILED(cssLoader->LoadSheetSync(uri, &newSheet)))
continue;
}
else {
newSheet = oldSheet;
}
mStyleSheetList.AppendElement(newSheet);
}
GatherRuleProcessor();
return NS_OK;
}
nsresult
nsXBLPrototypeResources::Write(nsIObjectOutputStream* aStream)
{
if (mLoader)
return mLoader->Write(aStream);
return NS_OK;
}
void
nsXBLPrototypeResources::Traverse(nsCycleCollectionTraversalCallback &cb)
{
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "proto mResources mLoader");
cb.NoteXPCOMChild(mLoader);
CycleCollectionNoteChild(cb, mRuleProcessor.get(), "mRuleProcessor");
ImplCycleCollectionTraverse(cb, mStyleSheetList, "mStyleSheetList");
}
void
nsXBLPrototypeResources::Unlink()
{
mStyleSheetList.Clear();
mRuleProcessor = nullptr;
}
void
nsXBLPrototypeResources::ClearLoader()
{
mLoader = nullptr;
}
void
nsXBLPrototypeResources::GatherRuleProcessor()
{
nsTArray<RefPtr<CSSStyleSheet>> sheets(mStyleSheetList.Length());
for (StyleSheet* sheet : mStyleSheetList) {
MOZ_ASSERT(sheet->IsGecko(),
"GatherRuleProcessor must only be called for "
"nsXBLPrototypeResources objects with Gecko-flavored style "
"backends");
sheets.AppendElement(sheet->AsGecko());
}
mRuleProcessor = new nsCSSRuleProcessor(Move(sheets),
SheetType::Doc,
nullptr,
mRuleProcessor);
}
void
nsXBLPrototypeResources::AppendStyleSheet(StyleSheet* aSheet)
{
mStyleSheetList.AppendElement(aSheet);
}
void
nsXBLPrototypeResources::RemoveStyleSheet(StyleSheet* aSheet)
{
mStyleSheetList.RemoveElement(aSheet);
}
void
nsXBLPrototypeResources::InsertStyleSheetAt(size_t aIndex, StyleSheet* aSheet)
{
mStyleSheetList.InsertElementAt(aIndex, aSheet);
}
StyleSheet*
nsXBLPrototypeResources::StyleSheetAt(size_t aIndex) const
{
return mStyleSheetList[aIndex];
}
size_t
nsXBLPrototypeResources::SheetCount() const
{
return mStyleSheetList.Length();
}
bool
nsXBLPrototypeResources::HasStyleSheets() const
{
return !mStyleSheetList.IsEmpty();
}
void
nsXBLPrototypeResources::AppendStyleSheetsTo(
nsTArray<StyleSheet*>& aResult) const
{
aResult.AppendElements(mStyleSheetList);
}