Add link annotation support to SkSVGDevice.

This CL implements |SkSVGDevice::drawAnnotation|, overridden from
|SKBaseDevice|.  |drawAnnotation| supports annotating rectangular areas
of a Skia device.  Previous to this change, annotations are being used
in |SkPDFDevice| to include hyperlinked rectangular areas in .pdf
documents.  This CL implements the SVG equivalent of this PDF feature.

BUG=skia:7581

Docs-Preview: https://skia.org/?cl=104680
Change-Id: I92ae01ceb7ae10cd2010bebab2a58dcfe48ef253
Reviewed-on: https://skia-review.googlesource.com/104680
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Florin Malita <fmalita@chromium.org>

1 files changed, 43 insertions, 2 deletions

diff --git a/tests/AnnotationTest.cpp b/tests/AnnotationTest.cpp
index cc2fd1f912..b49b80d545 100644
--- a/tests/AnnotationTest.cpp
+++ b/tests/AnnotationTest.cpp
@@ -8,7 +8,9 @@
 #include "SkCanvas.h"
 #include "SkData.h"
 #include "SkDocument.h"
+#include "SkSVGCanvas.h"
 #include "SkStream.h"
+#include "SkXMLWriter.h"
 #include "Test.h"
 
 /** Returns true if data (may contain null characters) contains needle (null
@@ -57,8 +59,8 @@ DEF_TEST(Annotation_PdfLink, reporter) {
     REPORTER_ASSERT(reporter, ContainsString(rawOutput, out->size(), "/Annots "));
 }
 
-DEF_TEST(Annotation_NamedDestination, reporter) {
-    REQUIRE_PDF_DOCUMENT(Annotation_NamedDestination, reporter);
+DEF_TEST(Annotation_PdfDefineNamedDestination, reporter) {
+    REQUIRE_PDF_DOCUMENT(Annotation_PdfNamedDestination, reporter);
     SkDynamicMemoryWStream outStream;
     sk_sp<SkDocument> doc(SkDocument::MakePDF(&outStream));
     SkCanvas* canvas = doc->beginPage(612.0f, 792.0f);
@@ -75,3 +77,42 @@ DEF_TEST(Annotation_NamedDestination, reporter) {
     REPORTER_ASSERT(reporter,
         ContainsString(rawOutput, out->size(), "/example "));
 }
+
+DEF_TEST(Annotation_SvgLink, reporter) {
+    SkDynamicMemoryWStream outStream;
+    std::unique_ptr<SkXMLWriter> xmlWriter(new SkXMLStreamWriter(&outStream));
+    SkRect bounds = SkRect::MakeIWH(400, 400);
+    std::unique_ptr<SkCanvas> canvas = SkSVGCanvas::Make(bounds, xmlWriter.get());
+
+    SkRect r = SkRect::MakeXYWH(SkIntToScalar(72), SkIntToScalar(72), SkIntToScalar(288),
+                                SkIntToScalar(72));
+    sk_sp<SkData> data(SkData::MakeWithCString("http://www.gooogle.com"));
+    SkAnnotateRectWithURL(canvas.get(), r, data.get());
+
+    canvas->flush();
+    sk_sp<SkData> out = outStream.detachAsData();
+    const char* rawOutput = (const char*)out->data();
+
+    REPORTER_ASSERT(reporter,
+        ContainsString(rawOutput, out->size(), "a xlink:href=\"http://www.gooogle.com\""));
+}
+
+DEF_TEST(Annotation_SvgLinkNamedDestination, reporter) {
+    SkDynamicMemoryWStream outStream;
+    std::unique_ptr<SkXMLWriter> xmlWriter(new SkXMLStreamWriter(&outStream));
+    SkRect bounds = SkRect::MakeIWH(400, 400);
+    std::unique_ptr<SkCanvas> canvas = SkSVGCanvas::Make(bounds, xmlWriter.get());
+
+    SkRect r = SkRect::MakeXYWH(SkIntToScalar(72), SkIntToScalar(72), SkIntToScalar(288),
+                                SkIntToScalar(72));
+    sk_sp<SkData> data(SkData::MakeWithCString("http://www.gooogle.com/#NamedDestination"));
+    SkAnnotateLinkToDestination(canvas.get(), r, data.get());
+
+    canvas->flush();
+    sk_sp<SkData> out = outStream.detachAsData();
+    const char* rawOutput = (const char*)out->data();
+
+    REPORTER_ASSERT(reporter,
+                    ContainsString(rawOutput, out->size(),
+                                   "a xlink:href=\"http://www.gooogle.com/#NamedDestination\""));
+}