1 /* 2 * Copyright 2013 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 "SkDocument.h" 9 #include "SkStream.h" 10 11 SK_DEFINE_INST_COUNT(SkDocument) 12 13 SkDocument::SkDocument(SkWStream* stream, void (*doneProc)(SkWStream*)) { 14 fStream = stream; // we do not own this object. 15 fDoneProc = doneProc; 16 fState = kBetweenPages_State; 17 } 18 19 SkDocument::~SkDocument() { 20 this->close(); 21 } 22 23 SkCanvas* SkDocument::beginPage(SkScalar width, SkScalar height, 24 const SkRect* content) { 25 if (width <= 0 || height <= 0) { 26 return NULL; 27 } 28 29 SkRect outer = SkRect::MakeWH(width, height); 30 SkRect inner; 31 if (content) { 32 inner = *content; 33 if (!inner.intersect(outer)) { 34 return NULL; 35 } 36 } else { 37 inner = outer; 38 } 39 40 for (;;) { 41 switch (fState) { 42 case kBetweenPages_State: 43 fState = kInPage_State; 44 return this->onBeginPage(width, height, inner); 45 case kInPage_State: 46 this->endPage(); 47 break; 48 case kClosed_State: 49 return NULL; 50 } 51 } 52 SkASSERT(!"never get here"); 53 return NULL; 54 } 55 56 void SkDocument::endPage() { 57 if (kInPage_State == fState) { 58 fState = kBetweenPages_State; 59 this->onEndPage(); 60 } 61 } 62 63 void SkDocument::close() { 64 for (;;) { 65 switch (fState) { 66 case kBetweenPages_State: 67 fState = kClosed_State; 68 this->onClose(fStream); 69 70 if (fDoneProc) { 71 fDoneProc(fStream); 72 } 73 // we don't own the stream, but we mark it NULL since we can 74 // no longer write to it. 75 fStream = NULL; 76 return; 77 case kInPage_State: 78 this->endPage(); 79 break; 80 case kClosed_State: 81 return; 82 } 83 } 84 } 85
