diff options
Diffstat (limited to 'xfa/src/fdp/src/css/fde_csscache.cpp')
| -rw-r--r-- | xfa/src/fdp/src/css/fde_csscache.cpp | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/xfa/src/fdp/src/css/fde_csscache.cpp b/xfa/src/fdp/src/css/fde_csscache.cpp new file mode 100644 index 0000000000..13ff27b8e7 --- /dev/null +++ b/xfa/src/fdp/src/css/fde_csscache.cpp @@ -0,0 +1,163 @@ +// 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((FX_LPCWSTR)L"id", 2, TRUE);
+ static const FX_DWORD s_dwClassHash = FX_HashCode_String_GetW((FX_LPCWSTR)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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