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 "include/core/SkCanvas.h"
9#include "include/core/SkDocument.h"
10#include "include/core/SkStream.h"
11
12SkDocument::SkDocument(SkWStream* stream) : fStream(stream), fState(kBetweenPages_State) {}
13
14SkDocument::~SkDocument() {
15 this->close();
16}
17
18static SkCanvas* trim(SkCanvas* canvas, SkScalar width, SkScalar height,
19 const SkRect* content) {
20 if (content && canvas) {
21 SkRect inner = *content;
22 if (!inner.intersect({0, 0, width, height})) {
23 return nullptr;
24 }
25 canvas->clipRect(inner);
26 canvas->translate(inner.x(), inner.y());
27 }
28 return canvas;
29}
30
31SkCanvas* SkDocument::beginPage(SkScalar width, SkScalar height,
32 const SkRect* content) {
33 if (width <= 0 || height <= 0 || kClosed_State == fState) {
34 return nullptr;
35 }
36 if (kInPage_State == fState) {
37 this->endPage();
38 }
39 SkASSERT(kBetweenPages_State == fState);
40 fState = kInPage_State;
41 return trim(this->onBeginPage(width, height), width, height, content);
42}
43
44void SkDocument::endPage() {
45 if (kInPage_State == fState) {
46 fState = kBetweenPages_State;
47 this->onEndPage();
48 }
49}
50
51void SkDocument::close() {
52 for (;;) {
53 switch (fState) {
54 case kBetweenPages_State: {
55 fState = kClosed_State;
56 this->onClose(fStream);
57 // we don't own the stream, but we mark it nullptr since we can
58 // no longer write to it.
59 fStream = nullptr;
60 return;
61 }
62 case kInPage_State:
63 this->endPage();
64 break;
65 case kClosed_State:
66 return;
67 }
68 }
69}
70
71void SkDocument::abort() {
72 this->onAbort();
73
74 fState = kClosed_State;
75 // we don't own the stream, but we mark it nullptr since we can
76 // no longer write to it.
77 fStream = nullptr;
78}
79