PDF: add support for named destinations.

src/core/SkAnnotation.cpp

Index: src/core/SkAnnotation.cpp
===================================================================
--- src/core/SkAnnotation.cpp	(revision 8005)
+++ src/core/SkAnnotation.cpp	(working copy)
@@ -8,6 +8,7 @@
 #include "SkAnnotation.h"
 #include "SkDataSet.h"
 #include "SkFlattenableBuffers.h"
+#include "SkPoint.h"
 #include "SkStream.h"
 
 SkAnnotation::SkAnnotation(SkDataSet* data, uint32_t flags) {
@@ -42,23 +43,50 @@
     return "SkAnnotationKey_URL";
 };
 
+const char* SkAnnotationKeys::Define_Named_Dest_Key() {
+    return "SkAnnotationKey_Define_Named_Dest";
+};
+
+const char* SkAnnotationKeys::Link_Named_Dest_Key() {
+    return "SkAnnotationKey_Link_Named_Dest";
+};
+
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "SkCanvas.h"
 
-void SkAnnotateRectWithURL(SkCanvas* canvas, const SkRect& rect, SkData* value) {
-    if (NULL == value) {
-        return;
-    }
-
-    const char* key = SkAnnotationKeys::URL_Key();
+static void annotate_paint(SkPaint& paint, const char* key, SkData* value) {
     SkAutoTUnref<SkDataSet> dataset(SkNEW_ARGS(SkDataSet, (key, value)));
     SkAnnotation* ann = SkNEW_ARGS(SkAnnotation, (dataset,
                                                   SkAnnotation::kNoDraw_Flag));
 
-    SkPaint paint;
     paint.setAnnotation(ann)->unref();
     SkASSERT(paint.isNoDrawAnnotation());
+}
 
+void SkAnnotateRectWithURL(SkCanvas* canvas, const SkRect& rect, SkData* value) {
+    if (NULL == value) {
+        return;
+    }
+    SkPaint paint;
+    annotate_paint(paint, SkAnnotationKeys::URL_Key(), value);
     canvas->drawRect(rect, paint);
 }
+
+void SkAnnotateNamedDestination(SkCanvas* canvas, const SkPoint& point, SkData* name) {
+    if (NULL == name) {
+        return;
+    }
+    SkPaint paint;
+    annotate_paint(paint, SkAnnotationKeys::Define_Named_Dest_Key(), name);
+    canvas->drawPoint(point.x(), point.y(), paint);
+}
+
+void SkAnnotateLinkToDestination(SkCanvas* canvas, const SkRect& rect, SkData* name) {
+    if (NULL == name) {
+        return;
+    }
+    SkPaint paint;
+    annotate_paint(paint, SkAnnotationKeys::Link_Named_Dest_Key(), name);
+    canvas->drawRect(rect, paint);
+}