Add FPDFDest_GetLocationInPage API

fpdfsdk/fpdfdoc_embeddertest.cpp

 // Copyright 2015 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <string>
 
 #include "core/fxcrt/fx_string.h"
 #include "public/fpdf_doc.h"
 #include "public/fpdf_edit.h"
 #include "public/fpdfview.h"
@@ skipping 24 matching lines @@
   dest = FPDF_GetNamedDestByName(document(), "FirstAlternate");
   EXPECT_TRUE(dest);
   EXPECT_EQ(11U, FPDFDest_GetPageIndex(document(), dest));
 
   // Invalid object reference in item from Dests NameTree.
   dest = FPDF_GetNamedDestByName(document(), "LastAlternate");
   EXPECT_TRUE(dest);
   EXPECT_EQ(0U, FPDFDest_GetPageIndex(document(), dest));
 }
 
+TEST_F(FPDFDocEmbeddertest, DestGetLocationInPage) {
+  EXPECT_TRUE(OpenDocument("named_dests.pdf"));
+
+  // NULL FPDF_DEST case.
+  EXPECT_EQ(0U, FPDFDest_GetPageIndex(document(), nullptr));
+
+  FPDF_DEST dest = FPDF_GetNamedDestByName(document(), "First");
+  EXPECT_TRUE(dest);
+
+  FPDF_BOOL hasX;
+  FPDF_BOOL hasY;
+  FPDF_BOOL hasZoom;
+  FS_FLOAT x;
+  FS_FLOAT y;
+  FS_FLOAT zoom;
+  EXPECT_TRUE(
+      FPDFDest_GetLocationInPage(dest, &hasX, &hasY, &hasZoom, &x, &y, &zoom));
+  EXPECT_TRUE(hasX);
+  EXPECT_TRUE(hasY);
+  EXPECT_TRUE(hasZoom);
+  EXPECT_EQ(0, x);
+  EXPECT_EQ(0, y);
+  EXPECT_EQ(1, zoom);
+}
+
 TEST_F(FPDFDocEmbeddertest, ActionGetFilePath) {
   EXPECT_TRUE(OpenDocument("launch_action.pdf"));
 
   FPDF_PAGE page = FPDF_LoadPage(document(), 0);
   ASSERT_TRUE(page);
 
   // The target action is nearly the size of the whole page.
   FPDF_LINK link = FPDFLink_GetLinkAtPoint(page, 100, 100);
   ASSERT_TRUE(link);
 
@@ skipping 84 matching lines @@
       GetFPDFWideString(L"anything");
   EXPECT_EQ(nullptr, FPDFBookmark_Find(document(), title.get()));
 }
 
 TEST_F(FPDFDocEmbeddertest, DeletePage) {
   EXPECT_TRUE(OpenDocument("hello_world.pdf"));
   EXPECT_EQ(1, FPDF_GetPageCount(document()));
   FPDFPage_Delete(document(), 0);
   EXPECT_EQ(0, FPDF_GetPageCount(document()));
 }