Make CPDF_PageModuleDef and CPDF_RenderModuleDef pure virtual.

Get rid of the dummy implementations, which are never used when
the modules have been initialized.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1177383003.

5 files changed, 74 insertions, 67 deletions

diff --git a/core/src/fpdfapi/fpdf_basic_module.cpp b/core/src/fpdfapi/fpdf_basic_module.cpp
index 62be616d3d..03cfd66afb 100644
--- a/core/src/fpdfapi/fpdf_basic_module.cpp
+++ b/core/src/fpdfapi/fpdf_basic_module.cpp
@@ -6,50 +6,44 @@
 
 #include "../../include/fxcodec/fx_codec.h"
 #include "../../include/fpdfapi/fpdf_module.h"
-static CPDF_ModuleMgr*	g_FPDFAPI_pDefaultMgr = NULL;
+
+namespace {
+
+CPDF_ModuleMgr* g_FPDFAPI_pDefaultMgr = nullptr;
+
+const char kAddinNameCJK[] = "Eastern Asian Language Support";
+
+}  // namespace
+
+// static
 CPDF_ModuleMgr* CPDF_ModuleMgr::Get()
 {
     return g_FPDFAPI_pDefaultMgr;
 }
+
+// static
 void CPDF_ModuleMgr::Create()
 {
+    ASSERT(!g_FPDFAPI_pDefaultMgr);
     g_FPDFAPI_pDefaultMgr = new CPDF_ModuleMgr;
-    g_FPDFAPI_pDefaultMgr->Initialize();
 }
+
+// static
 void CPDF_ModuleMgr::Destroy()
 {
-    if (g_FPDFAPI_pDefaultMgr) {
-        delete g_FPDFAPI_pDefaultMgr;
-    }
-    g_FPDFAPI_pDefaultMgr = NULL;
+    delete g_FPDFAPI_pDefaultMgr;
+    g_FPDFAPI_pDefaultMgr = nullptr;
 }
+
 CPDF_ModuleMgr::CPDF_ModuleMgr()
+    : m_pCodecModule(nullptr)
 {
-    m_pCodecModule = NULL;
-    m_pPageModule = NULL;
-    m_pRenderModule = NULL;
-    m_FileBufSize = 512;
-}
-void CPDF_ModuleMgr::Initialize()
-{
-    InitModules();
-    m_FileBufSize = 512;
-}
-void CPDF_ModuleMgr::InitModules()
-{
-    m_pCodecModule = NULL;
-    m_pPageModule = new CPDF_PageModuleDef;
-    m_pRenderModule = new CPDF_RenderModuleDef;
 }
+
 CPDF_ModuleMgr::~CPDF_ModuleMgr()
 {
-    if (m_pPageModule) {
-        delete m_pPageModule;
-    }
-    if (m_pRenderModule) {
-        delete m_pRenderModule;
-    }
 }
+
 void CPDF_ModuleMgr::SetDownloadCallback(FX_BOOL (*callback)(const FX_CHAR* module_name))
 {
     m_pDownloadCallback = callback;
@@ -63,10 +57,8 @@ FX_BOOL CPDF_ModuleMgr::DownloadModule(const FX_CHAR* module_name)
 }
 void CPDF_ModuleMgr::NotifyModuleAvailable(const FX_CHAR* module_name)
 {
-    if (FXSYS_strcmp(module_name, ADDIN_NAME_CJK) == 0) {
+    if (FXSYS_strcmp(module_name, kAddinNameCJK) == 0) {
         m_pPageModule->NotifyCJKAvailable();
-    } else if (FXSYS_strcmp(module_name, ADDIN_NAME_DECODER) == 0) {
-        m_pRenderModule->NotifyDecoderAvailable();
     }
 }
 void CPDF_ModuleMgr::RegisterSecurityHandler(const FX_CHAR* filter, CPDF_SecurityHandler * (*CreateHandler)(void* param), void* param)
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page.cpp
index 984baedf16..97b28574fc 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page.cpp
@@ -898,7 +898,7 @@ void CPDF_Page::ParseContent(CPDF_ParseOptions* pOptions, FX_BOOL bReParse)
 CPDF_Page::~CPDF_Page()
 {
     if (m_pPageRender) {
-        CPDF_RenderModuleDef* pModule = CPDF_ModuleMgr::Get()->GetRenderModule();
+        IPDF_RenderModule* pModule = CPDF_ModuleMgr::Get()->GetRenderModule();
         pModule->DestroyPageCache(m_pPageRender);
     }
 }
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_doc.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_doc.cpp
index 0c2a773176..13d870d7e5 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_doc.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_doc.cpp
@@ -10,38 +10,45 @@
 #include "../fpdf_font/font_int.h"
 #include "pageint.h"
 
-class CPDF_PageModule : public CPDF_PageModuleDef
+class CPDF_PageModule : public IPDF_PageModule
 {
 public:
-    CPDF_PageModule() : m_StockGrayCS(PDFCS_DEVICEGRAY), m_StockRGBCS(PDFCS_DEVICERGB),
-        m_StockCMYKCS(PDFCS_DEVICECMYK) {}
-    virtual ~CPDF_PageModule() {}
-    virtual FX_BOOL Installed()
-    {
-        return TRUE;
-    }
-    virtual CPDF_DocPageData* CreateDocData(CPDF_Document* pDoc)
+    CPDF_PageModule()
+        : m_StockGrayCS(PDFCS_DEVICEGRAY),
+          m_StockRGBCS(PDFCS_DEVICERGB),
+          m_StockCMYKCS(PDFCS_DEVICECMYK) {}
+
+private:
+    ~CPDF_PageModule() override {}
+
+    CPDF_DocPageData* CreateDocData(CPDF_Document* pDoc) override
     {
         return new CPDF_DocPageData(pDoc);
     }
-    virtual void ReleaseDoc(CPDF_Document* pDoc);
-    virtual void ClearDoc(CPDF_Document* pDoc);
-    virtual CPDF_FontGlobals* GetFontGlobals()
+
+    void ReleaseDoc(CPDF_Document* pDoc) override;
+    void ClearDoc(CPDF_Document* pDoc) override;
+
+    CPDF_FontGlobals* GetFontGlobals() override
     {
         return &m_FontGlobals;
     }
-    virtual void ClearStockFont(CPDF_Document* pDoc)
+
+    void ClearStockFont(CPDF_Document* pDoc) override
     {
         m_FontGlobals.Clear(pDoc);
     }
-    virtual CPDF_ColorSpace* GetStockCS(int family);
-    virtual void NotifyCJKAvailable();
+
+    CPDF_ColorSpace* GetStockCS(int family) override;
+    void NotifyCJKAvailable() override;
+
     CPDF_FontGlobals m_FontGlobals;
     CPDF_DeviceCS m_StockGrayCS;
     CPDF_DeviceCS m_StockRGBCS;
     CPDF_DeviceCS m_StockCMYKCS;
     CPDF_PatternCS m_StockPatternCS;
 };
+
 CPDF_ColorSpace* CPDF_PageModule::GetStockCS(int family)
 {
     if (family == PDFCS_DEVICEGRAY) {
@@ -58,11 +65,12 @@ CPDF_ColorSpace* CPDF_PageModule::GetStockCS(int family)
     }
     return NULL;
 }
+
 void CPDF_ModuleMgr::InitPageModule()
 {
-    delete m_pPageModule;
-    m_pPageModule = new CPDF_PageModule;
+    m_pPageModule.reset(new CPDF_PageModule);
 }
+
 void CPDF_PageModule::ReleaseDoc(CPDF_Document* pDoc)
 {
     delete pDoc->GetPageData();
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
index 3caef06259..56df7f3a0c 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
@@ -1686,7 +1686,7 @@ CPDF_SyntaxParser::CPDF_SyntaxParser()
     m_pFileAccess = NULL;
     m_pCryptoHandler = NULL;
     m_pFileBuf = NULL;
-    m_BufSize = CPDF_ModuleMgr::Get()->m_FileBufSize;
+    m_BufSize = CPDF_ModuleMgr::kFileBufSize;
     m_pFileBuf = NULL;
     m_MetadataObjnum = 0;
     m_dwWordPos = 0;
diff --git a/core/src/fpdfapi/fpdf_render/fpdf_render.cpp b/core/src/fpdfapi/fpdf_render/fpdf_render.cpp
index 608e124118..06c9ea614f 100644
--- a/core/src/fpdfapi/fpdf_render/fpdf_render.cpp
+++ b/core/src/fpdfapi/fpdf_render/fpdf_render.cpp
@@ -78,34 +78,40 @@ void CPDF_DocRenderData::ReleaseCachedType3(CPDF_Type3Font* pFont)
     if (m_Type3FaceMap.Lookup(pFont, pCache))
         pCache->RemoveRef();
 }
-class CPDF_RenderModule : public CPDF_RenderModuleDef
+
+class CPDF_RenderModule : public IPDF_RenderModule
 {
 public:
-    virtual ~CPDF_RenderModule() {}
-    virtual FX_BOOL	Installed()
-    {
-        return TRUE;
-    }
-    virtual CPDF_DocRenderData*	CreateDocData(CPDF_Document* pDoc);
-    virtual void	DestroyDocData(CPDF_DocRenderData* p);
-    virtual void	ClearDocData(CPDF_DocRenderData* p);
-    virtual CPDF_DocRenderData* GetRenderData()
+   CPDF_RenderModule() {}
+
+private:
+    ~CPDF_RenderModule() override {}
+
+    CPDF_DocRenderData* CreateDocData(CPDF_Document* pDoc) override;
+    void DestroyDocData(CPDF_DocRenderData* p) override;
+    void ClearDocData(CPDF_DocRenderData* p) override;
+
+    CPDF_DocRenderData* GetRenderData() override
     {
         return &m_RenderData;
     }
-    virtual CPDF_PageRenderCache*	CreatePageCache(CPDF_Page* pPage)
+
+    CPDF_PageRenderCache* CreatePageCache(CPDF_Page* pPage) override
     {
         return new CPDF_PageRenderCache(pPage);
     }
-    virtual void	DestroyPageCache(CPDF_PageRenderCache* pCache);
-    virtual CPDF_RenderConfig*	GetConfig()
+
+    void DestroyPageCache(CPDF_PageRenderCache* pCache) override;
+
+    CPDF_RenderConfig* GetConfig() override
     {
         return &m_RenderConfig;
     }
-private:
-    CPDF_DocRenderData	m_RenderData;
-    CPDF_RenderConfig	m_RenderConfig;
+
+    CPDF_DocRenderData m_RenderData;
+    CPDF_RenderConfig m_RenderConfig;
 };
+
 CPDF_DocRenderData*	CPDF_RenderModule::CreateDocData(CPDF_Document* pDoc)
 {
     CPDF_DocRenderData* pData = new CPDF_DocRenderData(pDoc);
@@ -126,11 +132,12 @@ void CPDF_RenderModule::DestroyPageCache(CPDF_PageRenderCache* pCache)
 {
     delete pCache;
 }
+
 void CPDF_ModuleMgr::InitRenderModule()
 {
-    delete m_pRenderModule;
-    m_pRenderModule = new CPDF_RenderModule;
+    m_pRenderModule.reset(new CPDF_RenderModule);
 }
+
 CPDF_RenderOptions::CPDF_RenderOptions()
     : m_ColorMode(RENDER_COLOR_NORMAL)
     , m_Flags(RENDER_CLEARTYPE)