Remove IFDE_CSSTagProvider.

There is only one subsclass, use that instead. Remove the use of WideStringC
in the API.

BUG=pdfium:468

Review URL: https://codereview.chromium.org/1911843002

2 files changed, 19 insertions, 43 deletions

diff --git a/xfa/fxfa/app/xfa_textlayout.cpp b/xfa/fxfa/app/xfa_textlayout.cpp
index c0a8895bc7..b2030814bc 100644
--- a/xfa/fxfa/app/xfa_textlayout.cpp
+++ b/xfa/fxfa/app/xfa_textlayout.cpp
@@ -21,40 +21,11 @@
 #include "xfa/fxfa/include/xfa_ffdoc.h"
 #include "xfa/fxfa/include/xfa_fontmgr.h"
 
-CXFA_CSSTagProvider::~CXFA_CSSTagProvider() {
-  FX_POSITION pos = m_Attributes.GetStartPosition();
-  while (pos) {
-    CFX_WideString *pName = NULL, *pValue = NULL;
-    m_Attributes.GetNextAssoc(pos, (void*&)pName, (void*&)pValue);
-    delete pName;
-    delete pValue;
-  }
-}
-void CXFA_CSSTagProvider::GetNextAttribute(FX_POSITION& pos,
-                                           CFX_WideStringC& wsAttr,
-                                           CFX_WideStringC& wsValue) {
-  if (pos == NULL) {
-    return;
-  }
-  CFX_WideString* pName = NULL;
-  CFX_WideString* pValue = NULL;
-  m_Attributes.GetNextAssoc(pos, (void*&)pName, (void*&)pValue);
-  wsAttr = pName->AsStringC();
-  wsValue = pValue->AsStringC();
-}
-void CXFA_CSSTagProvider::SetAttribute(const CFX_WideString& wsAttr,
-                                       const CFX_WideString& wsValue) {
-  CFX_WideString* pName = new CFX_WideString();
-  CFX_WideString* pValue = new CFX_WideString();
-  *pName = wsAttr;
-  *pValue = wsValue;
-  m_Attributes.SetAt(pName, pValue);
-}
 void CXFA_TextParseContext::SetDecls(const IFDE_CSSDeclaration** ppDeclArray,
                                      int32_t iDeclCount) {
-  if (iDeclCount <= 0 || ppDeclArray == NULL) {
+  if (iDeclCount <= 0 || !ppDeclArray)
     return;
-  }
+
   m_dwMatchedDecls = iDeclCount;
   m_ppMatchedDecls = FX_Alloc(IFDE_CSSDeclaration*, iDeclCount);
   FXSYS_memcpy(m_ppMatchedDecls, ppDeclArray,
diff --git a/xfa/fxfa/app/xfa_textlayout.h b/xfa/fxfa/app/xfa_textlayout.h
index 9c3184b48b..9cced6a65a 100644
--- a/xfa/fxfa/app/xfa_textlayout.h
+++ b/xfa/fxfa/app/xfa_textlayout.h
@@ -7,6 +7,8 @@
 #ifndef XFA_FXFA_APP_XFA_TEXTLAYOUT_H_
 #define XFA_FXFA_APP_XFA_TEXTLAYOUT_H_
 
+#include <map>
+
 #include "xfa/fde/css/fde_css.h"
 #include "xfa/fde/fde_gedevice.h"
 #include "xfa/fgas/layout/fgas_rtfbreak.h"
@@ -20,28 +22,31 @@ class CXFA_Font;
 class CXFA_TextProvider;
 class CXFA_TextTabstopsContext;
 
-class CXFA_CSSTagProvider : public IFDE_CSSTagProvider {
+class CXFA_CSSTagProvider {
  public:
   CXFA_CSSTagProvider() : m_bTagAviliable(FALSE), m_bContent(FALSE) {}
-  virtual ~CXFA_CSSTagProvider();
+  ~CXFA_CSSTagProvider() {}
+
+  CFX_WideString GetTagName() { return m_wsTagName; }
+
+  using AttributeMap = std::map<CFX_WideString, CFX_WideString>;
+  AttributeMap::iterator begin() { return m_Attributes.begin(); }
+  AttributeMap::iterator end() { return m_Attributes.end(); }
+
+  bool empty() const { return m_Attributes.empty(); }
 
-  // Note: |this| must outlive the use of GetTagName()'s result.
-  virtual CFX_WideStringC GetTagName() { return m_wsTagName.AsStringC(); }
-  virtual FX_POSITION GetFirstAttribute() {
-    return m_Attributes.GetStartPosition();
-  }
-  virtual void GetNextAttribute(FX_POSITION& pos,
-                                CFX_WideStringC& wsAttr,
-                                CFX_WideStringC& wsValue);
   void SetTagNameObj(const CFX_WideString& wsName) { m_wsTagName = wsName; }
   void SetAttribute(const CFX_WideString& wsAttr,
-                    const CFX_WideString& wsValue);
+                    const CFX_WideString& wsValue) {
+    m_Attributes.insert({wsAttr, wsValue});
+  }
+
   FX_BOOL m_bTagAviliable;
   FX_BOOL m_bContent;
 
  protected:
   CFX_WideString m_wsTagName;
-  CFX_MapPtrToPtr m_Attributes;
+  AttributeMap m_Attributes;
 };
 
 class CXFA_TextParseContext : public CFX_Target {