pdf: add PDFiumTextPage and PDFiumPageObject + test

Also use it in ImpSdrPdfImport.

Change-Id: I6d353ef60d036c3516448e64a50b25a9befd5db8
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/97364
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

2 files changed, 98 insertions, 1 deletions

diff --git a/vcl/qa/cppunit/PDFiumLibraryTest.cxx b/vcl/qa/cppunit/PDFiumLibraryTest.cxx
index 61b3981731f6..9c0c92607b14 100644
--- a/vcl/qa/cppunit/PDFiumLibraryTest.cxx
+++ b/vcl/qa/cppunit/PDFiumLibraryTest.cxx
@@ -35,6 +35,7 @@ class PDFiumLibraryTest : public test::BootstrapFixtureBase
 
     void testDocument();
     void testPages();
+    void testPageObjects();
     void testAnnotationsMadeInEvince();
     void testAnnotationsMadeInAcrobat();
     void testTools();
@@ -42,6 +43,7 @@ class PDFiumLibraryTest : public test::BootstrapFixtureBase
     CPPUNIT_TEST_SUITE(PDFiumLibraryTest);
     CPPUNIT_TEST(testDocument);
     CPPUNIT_TEST(testPages);
+    CPPUNIT_TEST(testPageObjects);
     CPPUNIT_TEST(testAnnotationsMadeInEvince);
     CPPUNIT_TEST(testAnnotationsMadeInAcrobat);
     CPPUNIT_TEST(testTools);
@@ -74,12 +76,35 @@ void PDFiumLibraryTest::testDocument()
     auto aSize = pDocument->getPageSize(0);
     CPPUNIT_ASSERT_EQUAL(612.0, aSize.getX());
     CPPUNIT_ASSERT_EQUAL(792.0, aSize.getY());
+}
+
+void PDFiumLibraryTest::testPages()
+{
+    OUString aURL = getFullUrl("Pangram.pdf");
+    SvFileStream aStream(aURL, StreamMode::READ);
+    GraphicFilter& rGraphicFilter = GraphicFilter::GetGraphicFilter();
+    Graphic aGraphic = rGraphicFilter.ImportUnloadedGraphic(aStream);
+    aGraphic.makeAvailable();
+
+    auto pVectorGraphicData = aGraphic.getVectorGraphicData();
+    CPPUNIT_ASSERT(pVectorGraphicData);
+    CPPUNIT_ASSERT_EQUAL(VectorGraphicDataType::Pdf,
+                         pVectorGraphicData->getVectorGraphicDataType());
+
+    const void* pData = pVectorGraphicData->getVectorGraphicDataArray().getConstArray();
+    int nLength = pVectorGraphicData->getVectorGraphicDataArrayLength();
+
+    auto pPdfium = vcl::pdf::PDFiumLibrary::get();
+    auto pDocument = pPdfium->openDocument(pData, nLength);
+    CPPUNIT_ASSERT(pDocument);
+
+    CPPUNIT_ASSERT_EQUAL(1, pDocument->getPageCount());
 
     auto pPage = pDocument->openPage(0);
     CPPUNIT_ASSERT(pPage);
 }
 
-void PDFiumLibraryTest::testPages()
+void PDFiumLibraryTest::testPageObjects()
 {
     OUString aURL = getFullUrl("Pangram.pdf");
     SvFileStream aStream(aURL, StreamMode::READ);
@@ -103,6 +128,16 @@ void PDFiumLibraryTest::testPages()
 
     auto pPage = pDocument->openPage(0);
     CPPUNIT_ASSERT(pPage);
+
+    CPPUNIT_ASSERT_EQUAL(12, pPage->getObjectCount());
+
+    auto pPageObject = pPage->getObject(0);
+    auto pTextPage = pPage->getTextPage();
+
+    CPPUNIT_ASSERT_EQUAL(1, pPageObject->getType());
+    CPPUNIT_ASSERT_EQUAL(OUString("The quick, brown fox jumps over a lazy dog. DJs flock by when "
+                                  "MTV ax quiz prog. Junk MTV quiz "),
+                         pPageObject->getText(pTextPage));
 }
 
 void PDFiumLibraryTest::testAnnotationsMadeInEvince()
diff --git a/vcl/source/pdf/PDFiumLibrary.cxx b/vcl/source/pdf/PDFiumLibrary.cxx
index 7e723c56bf88..92d0cf84a201 100644
--- a/vcl/source/pdf/PDFiumLibrary.cxx
+++ b/vcl/source/pdf/PDFiumLibrary.cxx
@@ -15,6 +15,7 @@
 #include <vcl/filter/PDFiumLibrary.hxx>
 #include <fpdf_annot.h>
 #include <fpdf_edit.h>
+#include <fpdf_text.h>
 
 namespace vcl::pdf
 {
@@ -166,6 +167,19 @@ basegfx::B2DSize PDFiumDocument::getPageSize(int nIndex)
 
 int PDFiumDocument::getPageCount() { return FPDF_GetPageCount(mpPdfDocument); }
 
+int PDFiumPage::getObjectCount() { return FPDFPage_CountObjects(mpPage); }
+
+std::unique_ptr<PDFiumPageObject> PDFiumPage::getObject(int nIndex)
+{
+    std::unique_ptr<PDFiumPageObject> pPDFiumPageObject;
+    FPDF_PAGEOBJECT pPageObject = FPDFPage_GetObject(mpPage, nIndex);
+    if (pPageObject)
+    {
+        pPDFiumPageObject = std::make_unique<PDFiumPageObject>(pPageObject);
+    }
+    return pPDFiumPageObject;
+}
+
 int PDFiumPage::getAnnotationCount() { return FPDFPage_GetAnnotCount(mpPage); }
 
 int PDFiumPage::getAnnotationIndex(std::unique_ptr<PDFiumAnnotation> const& rAnnotation)
@@ -184,6 +198,42 @@ std::unique_ptr<PDFiumAnnotation> PDFiumPage::getAnnotation(int nIndex)
     return pPDFiumAnnotation;
 }
 
+std::unique_ptr<PDFiumTextPage> PDFiumPage::getTextPage()
+{
+    std::unique_ptr<PDFiumTextPage> pPDFiumTextPage;
+    FPDF_TEXTPAGE pTextPage = FPDFText_LoadPage(mpPage);
+    if (pTextPage)
+    {
+        pPDFiumTextPage = std::make_unique<PDFiumTextPage>(pTextPage);
+    }
+    return pPDFiumTextPage;
+}
+
+PDFiumPageObject::PDFiumPageObject(FPDF_PAGEOBJECT pPageObject)
+    : mpPageObject(pPageObject)
+{
+}
+
+PDFiumPageObject::~PDFiumPageObject() {}
+
+OUString PDFiumPageObject::getText(std::unique_ptr<PDFiumTextPage> const& pTextPage)
+{
+    OUString sReturnText;
+
+    const int nBytes = FPDFTextObj_GetText(mpPageObject, pTextPage->getPointer(), nullptr, 0);
+
+    std::unique_ptr<sal_Unicode[]> pText(new sal_Unicode[nBytes]);
+
+    const int nActualBytes
+        = FPDFTextObj_GetText(mpPageObject, pTextPage->getPointer(), pText.get(), nBytes);
+    if (nActualBytes > 2)
+        sReturnText = OUString(pText.get());
+
+    return sReturnText;
+}
+
+int PDFiumPageObject::getType() { return FPDFPageObj_GetType(mpPageObject); }
+
 PDFiumAnnotation::PDFiumAnnotation(FPDF_ANNOTATION pAnnotation)
     : mpAnnotation(pAnnotation)
 {
@@ -238,6 +288,18 @@ std::unique_ptr<PDFiumAnnotation> PDFiumAnnotation::getLinked(OString const& rKe
     }
     return pPDFiumAnnotation;
 }
+
+PDFiumTextPage::PDFiumTextPage(FPDF_TEXTPAGE pTextPage)
+    : mpTextPage(pTextPage)
+{
+}
+
+PDFiumTextPage::~PDFiumTextPage()
+{
+    if (mpTextPage)
+        FPDFText_ClosePage(mpTextPage);
+}
+
 } // end vcl::pdf
 
 #endif // HAVE_FEATURE_PDFIUM