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authordsinclair <dsinclair@chromium.org>2016-11-08 06:55:40 -0800
committerCommit bot <commit-bot@chromium.org>2016-11-08 06:55:40 -0800
commitc59fa8895fa6fa8428b9b278eee6f05478ab8f56 (patch)
tree3216ee06e894144d578c07e5c655b7637bb6c59c /core/fpdfdoc/cpdf_dest.cpp
parent3c669a7fb05dfb602992a5d2333081daef6f002f (diff)
downloadpdfium-c59fa8895fa6fa8428b9b278eee6f05478ab8f56.tar.xz
Add FPDFDest_GetLocationInPage API
Add an API to get the value of the /XYZ destination parameter. This CL was originally from https://codereview.chromium.org/1960193003/ by halcanary@. Review-Url: https://codereview.chromium.org/2481743004
Diffstat (limited to 'core/fpdfdoc/cpdf_dest.cpp')
-rw-r--r--core/fpdfdoc/cpdf_dest.cpp49
1 files changed, 49 insertions, 0 deletions
diff --git a/core/fpdfdoc/cpdf_dest.cpp b/core/fpdfdoc/cpdf_dest.cpp
index 312ef87346..51e2d0b534 100644
--- a/core/fpdfdoc/cpdf_dest.cpp
+++ b/core/fpdfdoc/cpdf_dest.cpp
@@ -8,6 +8,8 @@
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_document.h"
+#include "core/fpdfapi/parser/cpdf_name.h"
+#include "core/fpdfapi/parser/cpdf_number.h"
namespace {
@@ -64,6 +66,53 @@ int CPDF_Dest::GetZoomMode() {
return 0;
}
+bool CPDF_Dest::GetXYZ(bool* pHasX,
+ bool* pHasY,
+ bool* pHasZoom,
+ float* pX,
+ float* pY,
+ float* pZoom) const {
+ *pHasX = false;
+ *pHasY = false;
+ *pHasZoom = false;
+
+ CPDF_Array* pArray = ToArray(m_pObj);
+ if (!pArray)
+ return false;
+
+ if (pArray->GetCount() < 5)
+ return false;
+
+ const CPDF_Name* xyz = ToName(pArray->GetDirectObjectAt(1));
+ if (!xyz || xyz->GetString() != "XYZ")
+ return false;
+
+ const CPDF_Number* numX = ToNumber(pArray->GetDirectObjectAt(2));
+ const CPDF_Number* numY = ToNumber(pArray->GetDirectObjectAt(3));
+ const CPDF_Number* numZoom = ToNumber(pArray->GetDirectObjectAt(4));
+
+ // If the value is a CPDF_Null then ToNumber will return nullptr.
+ *pHasX = !!numX;
+ *pHasY = !!numY;
+ *pHasZoom = !!numZoom;
+
+ if (numX)
+ *pX = numX->GetNumber();
+ if (numY)
+ *pY = numY->GetNumber();
+
+ // A zoom value of 0 is equivalent to a null value, so treat it as a null.
+ if (numZoom) {
+ float num = numZoom->GetNumber();
+ if (num == 0.0)
+ *pHasZoom = false;
+ else
+ *pZoom = num;
+ }
+
+ return true;
+}
+
FX_FLOAT CPDF_Dest::GetParam(int index) {
CPDF_Array* pArray = ToArray(m_pObj);
return pArray ? pArray->GetNumberAt(2 + index) : 0;