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
SkDocument(SkWStream * stream,void (* doneProc)(SkWStream *,bool))11 SkDocument::SkDocument(SkWStream* stream, void (*doneProc)(SkWStream*, bool)) {
12 fStream = stream; // we do not own this object.
13 fDoneProc = doneProc;
14 fState = kBetweenPages_State;
15 }
16
~SkDocument()17 SkDocument::~SkDocument() {
18 this->close();
19 }
20
beginPage(SkScalar width,SkScalar height,const SkRect * content)21 SkCanvas* SkDocument::beginPage(SkScalar width, SkScalar height,
22 const SkRect* content) {
23 if (width <= 0 || height <= 0) {
24 return nullptr;
25 }
26
27 SkRect outer = SkRect::MakeWH(width, height);
28 SkRect inner;
29 if (content) {
30 inner = *content;
31 if (!inner.intersect(outer)) {
32 return nullptr;
33 }
34 } else {
35 inner = outer;
36 }
37
38 for (;;) {
39 switch (fState) {
40 case kBetweenPages_State:
41 fState = kInPage_State;
42 return this->onBeginPage(width, height, inner);
43 case kInPage_State:
44 this->endPage();
45 break;
46 case kClosed_State:
47 return nullptr;
48 }
49 }
50 SkDEBUGFAIL("never get here");
51 return nullptr;
52 }
53
endPage()54 void SkDocument::endPage() {
55 if (kInPage_State == fState) {
56 fState = kBetweenPages_State;
57 this->onEndPage();
58 }
59 }
60
close()61 bool SkDocument::close() {
62 for (;;) {
63 switch (fState) {
64 case kBetweenPages_State: {
65 fState = kClosed_State;
66 bool success = this->onClose(fStream);
67
68 if (fDoneProc) {
69 fDoneProc(fStream, false);
70 }
71 // we don't own the stream, but we mark it nullptr since we can
72 // no longer write to it.
73 fStream = nullptr;
74 return success;
75 }
76 case kInPage_State:
77 this->endPage();
78 break;
79 case kClosed_State:
80 return false;
81 }
82 }
83 }
84
abort()85 void SkDocument::abort() {
86 this->onAbort();
87
88 fState = kClosed_State;
89 if (fDoneProc) {
90 fDoneProc(fStream, true);
91 }
92 // we don't own the stream, but we mark it nullptr since we can
93 // no longer write to it.
94 fStream = nullptr;
95 }
96