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// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "../../../foxitlib.h"
#include "fde_csscache.h"
_FDE_CSSCACHEITEM::_FDE_CSSCACHEITEM(IFDE_CSSStyleSheet *p)
: pStylesheet(p)
, dwActivity(0)
{
FXSYS_assert(pStylesheet);
pStylesheet->AddRef();
}
_FDE_CSSCACHEITEM::~_FDE_CSSCACHEITEM()
{
pStylesheet->Release();
}
IFDE_CSSStyleSheetCache* IFDE_CSSStyleSheetCache::Create()
{
return FDE_New CFDE_CSSStyleSheetCache;
}
CFDE_CSSStyleSheetCache::CFDE_CSSStyleSheetCache()
: m_pFixedStore(NULL)
, m_iMaxItems(5)
{
}
CFDE_CSSStyleSheetCache::~CFDE_CSSStyleSheetCache()
{
FX_POSITION pos = m_Stylesheets.GetStartPosition();
if (pos != NULL) {
CFX_ByteString szKey;
FX_LPVOID pValue;
while (pos != NULL) {
m_Stylesheets.GetNextAssoc(pos, szKey, pValue);
FDE_DeleteWith(FDE_CSSCACHEITEM, m_pFixedStore, (FDE_LPCSSCACHEITEM)pValue);
}
m_Stylesheets.RemoveAll();
}
if (m_pFixedStore != NULL) {
m_pFixedStore->Release();
}
}
void CFDE_CSSStyleSheetCache::AddStyleSheet(FX_BSTR szKey, IFDE_CSSStyleSheet *pStyleSheet)
{
FXSYS_assert(pStyleSheet != NULL);
if (m_pFixedStore == NULL) {
m_pFixedStore = FX_CreateAllocator(FX_ALLOCTYPE_Fixed, FX_MAX(10, m_iMaxItems), sizeof(FDE_CSSCACHEITEM));
FXSYS_assert(m_pFixedStore != NULL);
}
FX_LPVOID pValue = NULL;
if (m_Stylesheets.Lookup(szKey, pValue)) {
FDE_LPCSSCACHEITEM pItem = (FDE_LPCSSCACHEITEM)pValue;
if (pItem->pStylesheet != pStyleSheet) {
pItem->pStylesheet->Release();
pItem->pStylesheet = pStyleSheet;
pItem->pStylesheet->AddRef();
pItem->dwActivity = 0;
}
} else {
while (m_Stylesheets.GetCount() >= m_iMaxItems) {
RemoveLowestActivityItem();
}
FDE_LPCSSCACHEITEM pItem = FDE_NewWith(m_pFixedStore) FDE_CSSCACHEITEM(pStyleSheet);
FXSYS_assert(pItem != NULL);
m_Stylesheets.SetAt(szKey, pItem);
}
}
IFDE_CSSStyleSheet* CFDE_CSSStyleSheetCache::GetStyleSheet(FX_BSTR szKey) const
{
FX_LPVOID pValue = NULL;
if (m_Stylesheets.Lookup(szKey, pValue)) {
FDE_LPCSSCACHEITEM pItem = (FDE_LPCSSCACHEITEM)pValue;
pItem->dwActivity++;
pItem->pStylesheet->AddRef();
return pItem->pStylesheet;
}
return NULL;
}
void CFDE_CSSStyleSheetCache::RemoveStyleSheet(FX_BSTR szKey)
{
FX_LPVOID pValue = NULL;
if (!m_Stylesheets.Lookup(szKey, pValue)) {
return;
}
FDE_DeleteWith(FDE_CSSCACHEITEM, m_pFixedStore, (FDE_LPCSSCACHEITEM)pValue);
m_Stylesheets.RemoveKey(szKey);
}
void CFDE_CSSStyleSheetCache::RemoveLowestActivityItem()
{
FX_POSITION pos = m_Stylesheets.GetStartPosition();
CFX_ByteString szKey;
FX_LPVOID pValue;
FDE_LPCSSCACHEITEM pItem = NULL;
CFX_ByteString szItem;
while (pos != NULL) {
m_Stylesheets.GetNextAssoc(pos, szKey, pValue);
switch (szKey.GetID()) {
case FXBSTR_ID('#', 'U', 'S', 'E'):
case FXBSTR_ID('#', 'A', 'G', 'E'):
continue;
}
FDE_LPCSSCACHEITEM p = (FDE_LPCSSCACHEITEM)pValue;
if (pItem == NULL || pItem->dwActivity > p->dwActivity) {
szItem = szKey;
pItem = p;
}
}
if (pItem != NULL) {
FDE_DeleteWith(FDE_CSSCACHEITEM, m_pFixedStore, pItem);
m_Stylesheets.RemoveKey(szItem);
}
}
_FDE_CSSTAGCACHE::_FDE_CSSTAGCACHE(_FDE_CSSTAGCACHE *parent, IFDE_CSSTagProvider *tag)
: pTag(tag)
, pParent(parent)
, dwIDHash(0)
, dwTagHash(0)
, iClassIndex(0)
, dwClassHashs(1)
{
FXSYS_assert(pTag != NULL);
CFX_WideStringC wsValue, wsName = pTag->GetTagName();
dwTagHash = FX_HashCode_String_GetW(wsName.GetPtr(), wsName.GetLength(), TRUE);
FX_POSITION pos = pTag->GetFirstAttribute();
while (pos != NULL) {
pTag->GetNextAttribute(pos, wsName, wsValue);
FX_DWORD dwNameHash = FX_HashCode_String_GetW(wsName.GetPtr(), wsName.GetLength(), TRUE);
static const FX_DWORD s_dwIDHash = FX_HashCode_String_GetW(L"id", 2, TRUE);
static const FX_DWORD s_dwClassHash = FX_HashCode_String_GetW(L"class", 5, TRUE);
if (dwNameHash == s_dwClassHash) {
FX_DWORD dwHash = FX_HashCode_String_GetW(wsValue.GetPtr(), wsValue.GetLength());
dwClassHashs.Add(dwHash);
} else if (dwNameHash == s_dwIDHash) {
dwIDHash = FX_HashCode_String_GetW(wsValue.GetPtr(), wsValue.GetLength());
}
}
}
_FDE_CSSTAGCACHE::_FDE_CSSTAGCACHE(const _FDE_CSSTAGCACHE &it)
: pTag(it.pTag)
, pParent(it.pParent)
, dwIDHash(it.dwIDHash)
, dwTagHash(it.dwTagHash)
, iClassIndex(0)
, dwClassHashs(1)
{
if (it.dwClassHashs.GetSize() > 0) {
dwClassHashs.Copy(it.dwClassHashs);
}
}
void CFDE_CSSAccelerator::OnEnterTag(IFDE_CSSTagProvider *pTag)
{
FDE_CSSTAGCACHE *pTop = GetTopElement();
FDE_CSSTAGCACHE item(pTop, pTag);
m_Stack.Push(item);
}
void CFDE_CSSAccelerator::OnLeaveTag(IFDE_CSSTagProvider *pTag)
{
FDE_CSSTAGCACHE *pItem = m_Stack.GetTopElement();
FXSYS_assert(pItem && pItem->GetTag() == pTag);
m_Stack.Pop();
}
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