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