pdfium: add wrapper for FPDFText_FindClose()

So we can call it in the dtor, so we can't forget calling it.

Change-Id: I9cea58ca53763d85a4c239fd90611ac1c398564d
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/110092
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

3 files changed, 35 insertions, 10 deletions

diff --git a/include/vcl/filter/PDFiumLibrary.hxx b/include/vcl/filter/PDFiumLibrary.hxx
index 0fbcf4fe2199..418feede99b6 100644
--- a/include/vcl/filter/PDFiumLibrary.hxx
+++ b/include/vcl/filter/PDFiumLibrary.hxx
@@ -149,6 +149,21 @@ public:
     virtual bool getDrawMode(PDFFillMode& eFillMode, bool& bStroke) = 0;
 };
 
+class VCL_DLLPUBLIC PDFiumSearchHandle final
+{
+private:
+    FPDF_SCHHANDLE mpSearchHandle;
+
+    PDFiumSearchHandle(const PDFiumSearchHandle&) = delete;
+    PDFiumSearchHandle& operator=(const PDFiumSearchHandle&) = delete;
+
+public:
+    PDFiumSearchHandle(FPDF_SCHHANDLE pSearchHandle);
+    ~PDFiumSearchHandle();
+
+    FPDF_SCHHANDLE getPointer() { return mpSearchHandle; }
+};
+
 class VCL_DLLPUBLIC PDFiumTextPage final
 {
 private:
diff --git a/vcl/source/graphic/VectorGraphicSearch.cxx b/vcl/source/graphic/VectorGraphicSearch.cxx
index 083dc6cf2741..3ac33db37cc3 100644
--- a/vcl/source/graphic/VectorGraphicSearch.cxx
+++ b/vcl/source/graphic/VectorGraphicSearch.cxx
@@ -30,7 +30,7 @@ private:
     std::unique_ptr<vcl::pdf::PDFiumDocument>& mpPdfDocument;
     std::unique_ptr<vcl::pdf::PDFiumPage> mpPage;
     std::unique_ptr<vcl::pdf::PDFiumTextPage> mpTextPage;
-    FPDF_SCHHANDLE mpSearchHandle;
+    std::unique_ptr<vcl::pdf::PDFiumSearchHandle> mpSearchHandle;
 
 public:
     sal_Int32 mnPageIndex;
@@ -40,7 +40,6 @@ public:
 
     SearchContext(std::unique_ptr<vcl::pdf::PDFiumDocument>& pPdfDocument, sal_Int32 nPageIndex)
         : mpPdfDocument(pPdfDocument)
-        , mpSearchHandle(nullptr)
         , mnPageIndex(nPageIndex)
         , mnCurrentIndex(-1)
     {
@@ -49,7 +48,7 @@ public:
     ~SearchContext()
     {
         if (mpSearchHandle)
-            FPDFText_FindClose(mpSearchHandle);
+            mpSearchHandle.reset();
         if (mpTextPage)
             mpTextPage.reset();
         if (mpPage)
@@ -77,7 +76,7 @@ public:
             return true;
 
         if (mpSearchHandle)
-            FPDFText_FindClose(mpSearchHandle);
+            mpSearchHandle.reset();
 
         if (mpTextPage)
             mpTextPage.reset();
@@ -114,15 +113,15 @@ public:
         if (maOptions.mbMatchWholeWord)
             nSearchFlags |= FPDF_MATCHWHOLEWORD;
 
-        mpSearchHandle
-            = FPDFText_FindStart(mpTextPage->getPointer(), pString, nSearchFlags, nStartIndex);
+        mpSearchHandle = std::make_unique<vcl::pdf::PDFiumSearchHandle>(
+            FPDFText_FindStart(mpTextPage->getPointer(), pString, nSearchFlags, nStartIndex));
 
         return mpSearchHandle != nullptr;
     }
 
     bool next()
     {
-        if (mpSearchHandle && FPDFText_FindNext(mpSearchHandle))
+        if (mpSearchHandle && FPDFText_FindNext(mpSearchHandle->getPointer()))
         {
             mnCurrentIndex = index();
             return true;
@@ -132,7 +131,7 @@ public:
 
     bool previous()
     {
-        if (mpSearchHandle && FPDFText_FindPrev(mpSearchHandle))
+        if (mpSearchHandle && FPDFText_FindPrev(mpSearchHandle->getPointer()))
         {
             mnCurrentIndex = index();
             return true;
@@ -143,14 +142,14 @@ public:
     int index()
     {
         if (mpSearchHandle)
-            return FPDFText_GetSchResultIndex(mpSearchHandle);
+            return FPDFText_GetSchResultIndex(mpSearchHandle->getPointer());
         return -1;
     }
 
     int size()
     {
         if (mpSearchHandle)
-            return FPDFText_GetSchCount(mpSearchHandle);
+            return FPDFText_GetSchCount(mpSearchHandle->getPointer());
         return -1;
     }
 
diff --git a/vcl/source/pdf/PDFiumLibrary.cxx b/vcl/source/pdf/PDFiumLibrary.cxx
index 886549031596..fce8d4d539bd 100644
--- a/vcl/source/pdf/PDFiumLibrary.cxx
+++ b/vcl/source/pdf/PDFiumLibrary.cxx
@@ -1100,6 +1100,17 @@ unsigned int PDFiumTextPage::getUnicode(int index)
     return FPDFText_GetUnicode(mpTextPage, index);
 }
 
+PDFiumSearchHandle::PDFiumSearchHandle(FPDF_SCHHANDLE pSearchHandle)
+    : mpSearchHandle(pSearchHandle)
+{
+}
+
+PDFiumSearchHandle::~PDFiumSearchHandle()
+{
+    if (mpSearchHandle)
+        FPDFText_FindClose(mpSearchHandle);
+}
+
 } // end vcl::pdf
 
 #endif // HAVE_FEATURE_PDFIUM