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      1 /*
      2  * Copyright 2012 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "SkAnnotation.h"
      9 #include "SkData.h"
     10 #include "SkPaint.h"
     11 #include "SkPoint.h"
     12 #include "SkReadBuffer.h"
     13 #include "SkWriteBuffer.h"
     14 
     15 SkAnnotation::SkAnnotation(const char key[], SkData* value) : fKey(key) {
     16     if (nullptr == value) {
     17         value = SkData::NewEmpty();
     18     } else {
     19         value->ref();
     20     }
     21     fData = value;
     22 }
     23 
     24 SkAnnotation::~SkAnnotation() {
     25     fData->unref();
     26 }
     27 
     28 SkData* SkAnnotation::find(const char key[]) const {
     29     return fKey.equals(key) ? fData : nullptr;
     30 }
     31 
     32 SkAnnotation::SkAnnotation(SkReadBuffer& buffer) {
     33     buffer.readString(&fKey);
     34     fData = buffer.readByteArrayAsData();
     35 }
     36 
     37 void SkAnnotation::writeToBuffer(SkWriteBuffer& buffer) const {
     38     buffer.writeString(fKey.c_str());
     39     buffer.writeDataAsByteArray(fData);
     40 }
     41 
     42 const char* SkAnnotationKeys::URL_Key() {
     43     return "SkAnnotationKey_URL";
     44 };
     45 
     46 const char* SkAnnotationKeys::Define_Named_Dest_Key() {
     47     return "SkAnnotationKey_Define_Named_Dest";
     48 };
     49 
     50 const char* SkAnnotationKeys::Link_Named_Dest_Key() {
     51     return "SkAnnotationKey_Link_Named_Dest";
     52 };
     53 
     54 ///////////////////////////////////////////////////////////////////////////////
     55 
     56 #include "SkCanvas.h"
     57 
     58 static void annotate_paint(SkPaint& paint, const char* key, SkData* value) {
     59     paint.setAnnotation(SkAnnotation::Create(key, value))->unref();
     60 }
     61 
     62 void SkAnnotateRectWithURL(SkCanvas* canvas, const SkRect& rect, SkData* value) {
     63     if (nullptr == value) {
     64         return;
     65     }
     66     SkPaint paint;
     67     annotate_paint(paint, SkAnnotationKeys::URL_Key(), value);
     68     canvas->drawRect(rect, paint);
     69 }
     70 
     71 void SkAnnotateNamedDestination(SkCanvas* canvas, const SkPoint& point, SkData* name) {
     72     if (nullptr == name) {
     73         return;
     74     }
     75     SkPaint paint;
     76     annotate_paint(paint, SkAnnotationKeys::Define_Named_Dest_Key(), name);
     77     canvas->drawPoint(point.x(), point.y(), paint);
     78 }
     79 
     80 void SkAnnotateLinkToDestination(SkCanvas* canvas, const SkRect& rect, SkData* name) {
     81     if (nullptr == name) {
     82         return;
     83     }
     84     SkPaint paint;
     85     annotate_paint(paint, SkAnnotationKeys::Link_Named_Dest_Key(), name);
     86     canvas->drawRect(rect, paint);
     87 }
     88