Cleanup memory in CFDE_CSSStyleSelector

This CL fixes up the bare new calls in CFDE_CSSStyleSelector and replaces
them with unique_ptrs. Code massaged to work correclty with new types.

Change-Id: I90fce1ed7486da97fe7b5e597e9d423748c069c0
Reviewed-on: https://pdfium-review.googlesource.com/2353
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>

3 files changed, 19 insertions, 34 deletions

diff --git a/xfa/fxfa/app/cxfa_textparsecontext.cpp b/xfa/fxfa/app/cxfa_textparsecontext.cpp
index e4beb1fcb0..851d84456b 100644
--- a/xfa/fxfa/app/cxfa_textparsecontext.cpp
+++ b/xfa/fxfa/app/cxfa_textparsecontext.cpp
@@ -12,21 +12,6 @@
 
 CXFA_TextParseContext::CXFA_TextParseContext()
     : m_pParentStyle(nullptr),
-      m_ppMatchedDecls(nullptr),
-      m_dwMatchedDecls(0),
       m_eDisplay(FDE_CSSDisplay::None) {}
 
-CXFA_TextParseContext::~CXFA_TextParseContext() {
-  FX_Free(m_ppMatchedDecls);
-}
-
-void CXFA_TextParseContext::SetDecls(const CFDE_CSSDeclaration** ppDeclArray,
-                                     int32_t iDeclCount) {
-  if (iDeclCount <= 0 || !ppDeclArray)
-    return;
-
-  m_dwMatchedDecls = iDeclCount;
-  m_ppMatchedDecls = FX_Alloc(CFDE_CSSDeclaration*, iDeclCount);
-  FXSYS_memcpy(m_ppMatchedDecls, ppDeclArray,
-               iDeclCount * sizeof(CFDE_CSSDeclaration*));
-}
+CXFA_TextParseContext::~CXFA_TextParseContext() {}
diff --git a/xfa/fxfa/app/cxfa_textparsecontext.h b/xfa/fxfa/app/cxfa_textparsecontext.h
index d13f35b6df..5ea68e9473 100644
--- a/xfa/fxfa/app/cxfa_textparsecontext.h
+++ b/xfa/fxfa/app/cxfa_textparsecontext.h
@@ -7,9 +7,13 @@
 #ifndef XFA_FXFA_APP_CXFA_TEXTPARSECONTEXT_H_
 #define XFA_FXFA_APP_CXFA_TEXTPARSECONTEXT_H_
 
+#include <utility>
+#include <vector>
+
+#include "third_party/base/stl_util.h"
+#include "xfa/fde/css/cfde_cssdeclaration.h"
 #include "xfa/fde/css/fde_css.h"
 
-class CFDE_CSSDeclaration;
 class CFDE_CSSComputedStyle;
 
 class CXFA_TextParseContext {
@@ -20,17 +24,15 @@ class CXFA_TextParseContext {
   void SetDisplay(FDE_CSSDisplay eDisplay) { m_eDisplay = eDisplay; }
   FDE_CSSDisplay GetDisplay() const { return m_eDisplay; }
 
-  void SetDecls(const CFDE_CSSDeclaration** ppDeclArray, int32_t iDeclCount);
-  const CFDE_CSSDeclaration** GetDecls() {
-    return const_cast<const CFDE_CSSDeclaration**>(m_ppMatchedDecls);
+  void SetDecls(std::vector<const CFDE_CSSDeclaration*>&& decl) {
+    decls_ = std::move(decl);
   }
-  uint32_t CountDecls() const { return m_dwMatchedDecls; }
+  const std::vector<const CFDE_CSSDeclaration*>& GetDecls() { return decls_; }
 
   CFX_RetainPtr<CFDE_CSSComputedStyle> m_pParentStyle;
 
  protected:
-  CFDE_CSSDeclaration** m_ppMatchedDecls;
-  uint32_t m_dwMatchedDecls;
+  std::vector<const CFDE_CSSDeclaration*> decls_;
   FDE_CSSDisplay m_eDisplay;
 };
 
diff --git a/xfa/fxfa/app/cxfa_textparser.cpp b/xfa/fxfa/app/cxfa_textparser.cpp
index 9bf033f9b0..2a724cc243 100644
--- a/xfa/fxfa/app/cxfa_textparser.cpp
+++ b/xfa/fxfa/app/cxfa_textparser.cpp
@@ -8,6 +8,7 @@
 
 #include <algorithm>
 #include <utility>
+#include <vector>
 
 #include "third_party/base/ptr_util.h"
 #include "xfa/fde/css/cfde_cssaccelerator.h"
@@ -205,8 +206,8 @@ CFX_RetainPtr<CFDE_CSSComputedStyle> CXFA_TextParser::ComputeStyle(
   auto pStyle = CreateStyle(pParentStyle);
   CFDE_CSSAccelerator* pCSSAccel = m_pSelector->InitAccelerator();
   pCSSAccel->OnEnterTag(&tagProvider);
-  m_pSelector->ComputeStyle(&tagProvider, pContext->GetDecls(),
-                            pContext->CountDecls(), pStyle.Get());
+
+  m_pSelector->ComputeStyle(&tagProvider, pContext->GetDecls(), pStyle.Get());
   pCSSAccel->OnLeaveTag(&tagProvider);
   return pStyle;
 }
@@ -241,16 +242,13 @@ void CXFA_TextParser::ParseRichText(CFDE_XMLNode* pXMLNode,
       pNewStyle = CreateStyle(pParentStyle);
       CFDE_CSSAccelerator* pCSSAccel = m_pSelector->InitAccelerator();
       pCSSAccel->OnEnterTag(&tagProvider);
-      CFX_ArrayTemplate<CFDE_CSSDeclaration*> DeclArray;
-      int32_t iMatchedDecls =
-          m_pSelector->MatchDeclarations(&tagProvider, DeclArray);
-      const CFDE_CSSDeclaration** ppMatchDecls =
-          const_cast<const CFDE_CSSDeclaration**>(DeclArray.GetData());
-      m_pSelector->ComputeStyle(&tagProvider, ppMatchDecls, iMatchedDecls,
-                                pNewStyle.Get());
+
+      auto declArray = m_pSelector->MatchDeclarations(&tagProvider);
+      m_pSelector->ComputeStyle(&tagProvider, declArray, pNewStyle.Get());
+
       pCSSAccel->OnLeaveTag(&tagProvider);
-      if (iMatchedDecls > 0)
-        pTextContext->SetDecls(ppMatchDecls, iMatchedDecls);
+      if (!declArray.empty())
+        pTextContext->SetDecls(std::move(declArray));
 
       eDisplay = pNewStyle->GetDisplay();
     }