From e5133f196d97212440219d3b03e5f7c8ffe9f9c6 Mon Sep 17 00:00:00 2001
From: Tomaž Vajngerl <tomaz.vajngerl@collabora.co.uk>
Date: Fri, 29 May 2020 23:26:51 +0200
Subject: vcl: add "previous" search to VectorGraphicSearch
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Previous moves backwards in the search matches.

Change-Id: I88d402e0b8cb9dc4fd93e7f1ce5b08fb42aadd06
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/95381
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
(cherry picked from commit e20440effc7a47c8a5e8ef0943e6872cd9b3646a)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/95929
Tested-by: Tomaž Vajngerl <quikee@gmail.com>
(cherry picked from commit 9d653f4962aae4dae6c0d4166f020354a5f82711)
---
 include/vcl/VectorGraphicSearch.hxx        |  1 +
 vcl/qa/cppunit/VectorGraphicSearchTest.cxx | 40 ++++++++++++++++++++++++++++++
 vcl/source/graphic/VectorGraphicSearch.cxx | 14 +++++++++++
 3 files changed, 55 insertions(+)

diff --git a/include/vcl/VectorGraphicSearch.hxx b/include/vcl/VectorGraphicSearch.hxx
index 5420e161448b..a00c212ad61c 100644
--- a/include/vcl/VectorGraphicSearch.hxx
+++ b/include/vcl/VectorGraphicSearch.hxx
@@ -37,6 +37,7 @@ public:
     bool search(OUString const& rSearchString);
     basegfx::B2DSize pageSize();
     bool next();
+    bool previous();
     int index();
     std::vector<basegfx::B2DRectangle> getTextRectangles();
 };
diff --git a/vcl/qa/cppunit/VectorGraphicSearchTest.cxx b/vcl/qa/cppunit/VectorGraphicSearchTest.cxx
index 01022a3fe225..7962c23f4e8f 100644
--- a/vcl/qa/cppunit/VectorGraphicSearchTest.cxx
+++ b/vcl/qa/cppunit/VectorGraphicSearchTest.cxx
@@ -26,9 +26,11 @@ class VectorGraphicSearchTest : public test::BootstrapFixtureBase
     }
 
     void test();
+    void testNextPrevious();
 
     CPPUNIT_TEST_SUITE(VectorGraphicSearchTest);
     CPPUNIT_TEST(test);
+    CPPUNIT_TEST(testNextPrevious);
     CPPUNIT_TEST_SUITE_END();
 };
 
@@ -81,6 +83,44 @@ void VectorGraphicSearchTest::test()
     CPPUNIT_ASSERT_DOUBLES_EQUAL(6381.04, aRectangles[3].getMaxY(), 1E-2);
 }
 
+// Test next and previous work as expected to move
+// between search matches.
+void VectorGraphicSearchTest::testNextPrevious()
+{
+    OUString aURL = getFullUrl("Pangram.pdf");
+    SvFileStream aStream(aURL, StreamMode::READ);
+    GraphicFilter& rGraphicFilter = GraphicFilter::GetGraphicFilter();
+    Graphic aGraphic = rGraphicFilter.ImportUnloadedGraphic(aStream);
+    aGraphic.makeAvailable();
+
+    VectorGraphicSearch aSearch(aGraphic);
+    CPPUNIT_ASSERT_EQUAL(true, aSearch.search("lazy"));
+
+    // next - first match found
+    CPPUNIT_ASSERT_EQUAL(true, aSearch.next());
+    CPPUNIT_ASSERT_EQUAL(34, aSearch.index());
+
+    // next - second match found
+    CPPUNIT_ASSERT_EQUAL(true, aSearch.next());
+    CPPUNIT_ASSERT_EQUAL(817, aSearch.index());
+
+    // next - not found, index unchanged
+    CPPUNIT_ASSERT_EQUAL(false, aSearch.next());
+    CPPUNIT_ASSERT_EQUAL(817, aSearch.index());
+
+    // previous - first match
+    CPPUNIT_ASSERT_EQUAL(true, aSearch.previous());
+    CPPUNIT_ASSERT_EQUAL(34, aSearch.index());
+
+    // previous - not found, index unchanged
+    CPPUNIT_ASSERT_EQUAL(false, aSearch.previous());
+    CPPUNIT_ASSERT_EQUAL(34, aSearch.index());
+
+    // next - second match found
+    CPPUNIT_ASSERT_EQUAL(true, aSearch.next());
+    CPPUNIT_ASSERT_EQUAL(817, aSearch.index());
+}
+
 CPPUNIT_TEST_SUITE_REGISTRATION(VectorGraphicSearchTest);
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/source/graphic/VectorGraphicSearch.cxx b/vcl/source/graphic/VectorGraphicSearch.cxx
index d54f32930276..8b73cab71340 100644
--- a/vcl/source/graphic/VectorGraphicSearch.cxx
+++ b/vcl/source/graphic/VectorGraphicSearch.cxx
@@ -104,6 +104,13 @@ public:
         return false;
     }
 
+    bool previous()
+    {
+        if (mpSearchHandle)
+            return FPDFText_FindPrev(mpSearchHandle);
+        return false;
+    }
+
     int index()
     {
         if (mpSearchHandle)
@@ -245,6 +252,13 @@ bool VectorGraphicSearch::next()
     return false;
 }
 
+bool VectorGraphicSearch::previous()
+{
+    if (mpSearchContext)
+        return mpSearchContext->previous();
+    return false;
+}
+
 int VectorGraphicSearch::index()
 {
     if (mpSearchContext)
-- 
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