svx: support importing forms from PDFs

Still missing the context matrix transformations.

Change-Id: Id9457c6475463127d3bc444f36fa373a6ec8fcb6
(cherry picked from commit 08e2c68e99151c70d06581261bbc137f80967d9e)

2 files changed, 48 insertions, 29 deletions

diff --git a/svx/source/svdraw/svdpdf.cxx b/svx/source/svdraw/svdpdf.cxx
index b3e1f51730ed..acb85166bfd7 100644
--- a/svx/source/svdraw/svdpdf.cxx
+++ b/svx/source/svdraw/svdpdf.cxx
@@ -229,32 +229,7 @@ void ImpSdrPdfImport::DoLoopActions(SvdProgressInfo* pProgrInfo, sal_uInt32* pAc
         for (int nPageObjectIndex = 0; nPageObjectIndex < nPageObjectCount; ++nPageObjectIndex)
         {
             FPDF_PAGEOBJECT pPageObject = FPDFPage_GetObject(pPdfPage, nPageObjectIndex);
-            if (pPageObject == nullptr)
-                continue;
-
-            const int nPageObjectType = FPDFPageObj_GetType(pPageObject);
-            switch (nPageObjectType)
-            {
-                case FPDF_PAGEOBJ_TEXT:
-                    ImportText(pPageObject, nPageObjectIndex);
-                    break;
-                case FPDF_PAGEOBJ_PATH:
-                    ImportPath(pPageObject, nPageObjectIndex);
-                    break;
-                case FPDF_PAGEOBJ_IMAGE:
-                    ImportImage(pPageObject, nPageObjectIndex);
-                    break;
-                case FPDF_PAGEOBJ_SHADING:
-                    SAL_WARN("sd.filter", "Got page object SHADING: " << nPageObjectIndex);
-                    break;
-                case FPDF_PAGEOBJ_FORM:
-                    SAL_WARN("sd.filter", "Got page object FORM: " << nPageObjectIndex);
-                    break;
-                default:
-                    SAL_WARN("sd.filter", "Unknown PDF page object type: "
-                                              << nPageObjectType << ": " << nPageObjectIndex);
-                    break;
-            }
+            ImportPdfObject(pPageObject, nPageObjectIndex);
         }
 
 #if 0
@@ -1015,6 +990,49 @@ void ImpSdrPdfImport::checkClip()
 }
 
 bool ImpSdrPdfImport::isClip() const { return !maClip.getB2DRange().isEmpty(); }
+
+void ImpSdrPdfImport::ImportPdfObject(FPDF_PAGEOBJECT pPageObject, int nPageObjectIndex)
+{
+    if (pPageObject == nullptr)
+        return;
+
+    const int nPageObjectType = FPDFPageObj_GetType(pPageObject);
+    switch (nPageObjectType)
+    {
+        case FPDF_PAGEOBJ_TEXT:
+            ImportText(pPageObject, nPageObjectIndex);
+            break;
+        case FPDF_PAGEOBJ_PATH:
+            ImportPath(pPageObject, nPageObjectIndex);
+            break;
+        case FPDF_PAGEOBJ_IMAGE:
+            ImportImage(pPageObject, nPageObjectIndex);
+            break;
+        case FPDF_PAGEOBJ_SHADING:
+            SAL_WARN("sd.filter", "Got page object SHADING: " << nPageObjectIndex);
+            break;
+        case FPDF_PAGEOBJ_FORM:
+            ImportForm(pPageObject, nPageObjectIndex);
+            break;
+        default:
+            SAL_WARN("sd.filter", "Unknown PDF page object #" << nPageObjectIndex
+                                                              << " of type: " << nPageObjectType);
+            break;
+    }
+}
+
+void ImpSdrPdfImport::ImportForm(FPDF_PAGEOBJECT pPageObject, int nPageObjectIndex)
+{
+    SAL_WARN("sd.filter", "Got page object FORM: " << nPageObjectIndex);
+
+    const int nCount = FPDFFormObj_CountSubObjects(pPageObject);
+    for (int nIndex = 0; nIndex < nCount; ++nIndex)
+    {
+        FPDF_PAGEOBJECT pFormObject = FPDFFormObj_GetSubObject(pPageObject, nIndex);
+        ImportPdfObject(pFormObject, -1);
+    }
+}
+
 void ImpSdrPdfImport::ImportText(FPDF_PAGEOBJECT pPageObject, int nPageObjectIndex)
 {
     SAL_WARN("sd.filter", "Got page object TEXT: " << nPageObjectIndex);
diff --git a/svx/source/svdraw/svdpdf.hxx b/svx/source/svdraw/svdpdf.hxx
index 2063788290d9..d98f97d8cd09 100644
--- a/svx/source/svdraw/svdpdf.hxx
+++ b/svx/source/svdraw/svdpdf.hxx
@@ -100,13 +100,14 @@ class ImpSdrPdfImport final
     void checkClip();
     bool isClip() const;
 
+    void ImportPdfObject(FPDF_PAGEOBJECT pPageObject, int nPageObjectIndex);
+    void ImportForm(FPDF_PAGEOBJECT pPageObject, int nPageObjectIndex);
     void ImportImage(FPDF_PAGEOBJECT pPageObject, int nPageObjectIndex);
-    void SetupPageScale(const double dPageWidth, const double dPageHeight);
-
     void ImportPath(FPDF_PAGEOBJECT pPageObject, int nPageObjectIndex);
-
     void ImportText(FPDF_PAGEOBJECT pPageObject, int nPageObjectIndex);
     void ImportText(const Point& rPos, const Size& rSize, const OUString& rStr);
+
+    void SetupPageScale(const double dPageWidth, const double dPageHeight);
     void SetAttributes(SdrObject* pObj, bool bForceTextAttr = false);
     void InsertObj(SdrObject* pObj, bool bScale = true);
     void MapScaling();