/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkCanvas.h"
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#include "SkDocument.h"
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#include "SkStream.h"
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SkDocument::SkDocument(SkWStream* stream) : fStream(stream), fState(kBetweenPages_State) {}
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SkDocument::~SkDocument() {
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this->close();
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}
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static SkCanvas* trim(SkCanvas* canvas, SkScalar width, SkScalar height,
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const SkRect* content) {
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if (content && canvas) {
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SkRect inner = *content;
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if (!inner.intersect({0, 0, width, height})) {
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return nullptr;
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}
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canvas->clipRect(inner);
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canvas->translate(inner.x(), inner.y());
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}
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return canvas;
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}
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SkCanvas* SkDocument::beginPage(SkScalar width, SkScalar height,
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const SkRect* content) {
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if (width <= 0 || height <= 0 || kClosed_State == fState) {
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return nullptr;
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}
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if (kInPage_State == fState) {
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this->endPage();
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}
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SkASSERT(kBetweenPages_State == fState);
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fState = kInPage_State;
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return trim(this->onBeginPage(width, height), width, height, content);
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}
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void SkDocument::endPage() {
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if (kInPage_State == fState) {
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fState = kBetweenPages_State;
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this->onEndPage();
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}
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}
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void SkDocument::close() {
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for (;;) {
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switch (fState) {
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case kBetweenPages_State: {
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fState = kClosed_State;
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this->onClose(fStream);
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// we don't own the stream, but we mark it nullptr since we can
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// no longer write to it.
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fStream = nullptr;
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return;
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}
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case kInPage_State:
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this->endPage();
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break;
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case kClosed_State:
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return;
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}
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}
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}
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void SkDocument::abort() {
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this->onAbort();
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fState = kClosed_State;
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// we don't own the stream, but we mark it nullptr since we can
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// no longer write to it.
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fStream = nullptr;
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}
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